Adding upstream version 1.23.0.upstream/1.23.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

37 files changed, 4653 insertions, 0 deletions

diff --git a/src/include/DviChar.h b/src/include/DviChar.h
new file mode 100644
index 0000000..1100d81
--- /dev/null
+++ b/src/include/DviChar.h
@@ -0,0 +1,55 @@
+/* -*- C -*- */
+/* Copyright (C) 2014-2020 Free Software Foundation, Inc.
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You can find the license text at
+<http://www.gnu.org/licenses/gpl-2.0.txt>. */
+
+/*
+ * DviChar.h
+ *
+ * descriptions for mapping dvi names to
+ * font indexes and back.  Dvi fonts are all
+ * 256 elements (actually only 256-32 are usable).
+ *
+ * The encoding names are taken from X -
+ * case insensitive, a dash separating the
+ * CharSetRegistry from the CharSetEncoding
+ */
+
+# define DVI_MAX_SYNONYMS	10
+# define DVI_MAP_SIZE		256
+# define DVI_HASH_SIZE		256
+
+typedef struct _dviCharNameHash {
+	struct _dviCharNameHash	*next;
+	const char		*name;
+	int			position;
+} DviCharNameHash;
+
+typedef struct _dviCharNameMap {
+    const char		*encoding;
+    int			special;
+    const char		*dvi_names[DVI_MAP_SIZE][DVI_MAX_SYNONYMS];
+    DviCharNameHash	*buckets[DVI_HASH_SIZE];
+} DviCharNameMap;
+
+DviCharNameMap		*DviFindMap (char *);
+void			DviRegisterMap (DviCharNameMap *);
+#ifdef NOTDEF
+char			*DviCharName (DviCharNameMap *, int, int);
+#else
+#define DviCharName(map,index,synonym)	((map)->dvi_names[index][synonym])
+#endif
+int			DviCharIndex (DviCharNameMap *, const char *);
diff --git a/src/include/XFontName.h b/src/include/XFontName.h
new file mode 100644
index 0000000..4e9c694
--- /dev/null
+++ b/src/include/XFontName.h
@@ -0,0 +1,50 @@
+typedef struct _xFontName {
+	char		Registry[256];
+	char		Foundry[256];
+	char		FamilyName[256];
+	char		WeightName[256];
+	char		Slant[3];
+	char		SetwidthName[256];
+	char		AddStyleName[256];
+	unsigned int	PixelSize;
+	unsigned int	PointSize;
+	unsigned int	ResolutionX;
+	unsigned int	ResolutionY;
+	char		Spacing[2];
+	unsigned int	AverageWidth;
+	char		CharSetRegistry[256];
+	char		CharSetEncoding[256];
+} XFontName;
+
+#define FontNameRegistry	(1<<0)
+#define FontNameFoundry		(1<<1)
+#define FontNameFamilyName	(1<<2)
+#define FontNameWeightName	(1<<3)
+#define FontNameSlant		(1<<4)
+#define FontNameSetwidthName	(1<<5)
+#define FontNameAddStyleName	(1<<6)
+#define FontNamePixelSize	(1<<7)
+#define FontNamePointSize	(1<<8)
+#define FontNameResolutionX	(1<<9)
+#define FontNameResolutionY	(1<<10)
+#define FontNameSpacing		(1<<11)
+#define FontNameAverageWidth	(1<<12)
+#define FontNameCharSetRegistry	(1<<13)
+#define FontNameCharSetEncoding	(1<<14)
+
+#define SlantRoman		"R"
+#define SlantItalic		"I"
+#define SlantOblique		"O"
+#define SlantReverseItalic	"RI"
+#define SlantReverseOblique	"RO"
+
+#define SpacingMonoSpaced	"M"
+#define SpacingProportional	"P"
+#define SpacingCharacterCell	"C"
+
+typedef char	*XFontNameString;
+
+Bool XParseFontName (XFontNameString, XFontName *, unsigned int *);
+Bool XFormatFontName (XFontName *, unsigned int, XFontNameString);
+Bool XCompareFontName (XFontName *, XFontName *, unsigned int);
+Bool XCopyFontName (XFontName *, XFontName *, unsigned int);
diff --git a/src/include/cmap.h b/src/include/cmap.h
new file mode 100644
index 0000000..3a62da1
--- /dev/null
+++ b/src/include/cmap.h
@@ -0,0 +1,55 @@
+// -*- C++ -*-
+/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef UCHAR_MAX
+#define UCHAR_MAX 255
+#endif
+
+enum cmap_builtin { CMAP_BUILTIN };
+
+class cmap {
+public:
+  cmap();
+  cmap(cmap_builtin);
+  int operator()(unsigned char) const;
+  unsigned char &operator[](unsigned char);
+
+  friend class cmap_init;
+private:
+  unsigned char v[UCHAR_MAX+1];
+};
+
+inline int cmap::operator()(unsigned char c) const
+{
+  return v[c];
+}
+
+inline unsigned char &cmap::operator[](unsigned char c)
+{
+  return v[c];
+}
+
+extern cmap cmlower;
+extern cmap cmupper;
+
+static class cmap_init {
+  static int initialised;
+public:
+  cmap_init();
+} _cmap_init;
diff --git a/src/include/color.h b/src/include/color.h
new file mode 100644
index 0000000..e3f945b
--- /dev/null
+++ b/src/include/color.h
@@ -0,0 +1,88 @@
+// -*- C++ -*-
+/* <groff_src_dir>/src/include/color.h
+Copyright (C) 2001-2020 Free Software Foundation, Inc.
+    Written by Gaius Mulley <gaius@glam.ac.uk>
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#include <stddef.h>
+#include "symbol.h"
+
+enum color_scheme {DEFAULT, CMY, CMYK, RGB, GRAY};
+
+class color {
+private:
+  color_scheme scheme;
+  unsigned int components[4];
+  color *next;
+
+  int read_encoding(const color_scheme, const char * const,
+		    const size_t);
+
+public:
+  symbol nm;
+  enum {MAX_COLOR_VAL = 0xffff};
+  color(symbol s = default_symbol) : scheme(DEFAULT), nm(s) {}
+  color(const color * const);
+  ~color();
+
+  int operator==(const color & c) const;
+  int operator!=(const color & c) const;
+
+  int is_default() { return scheme == DEFAULT; }
+
+  // set color from given color component values
+  void set_default();
+  void set_rgb(const unsigned int r, const unsigned int g,
+	       const unsigned int b);
+  void set_cmy(const unsigned int c, const unsigned int m,
+	       const unsigned int y);
+  void set_cmyk(const unsigned int c, const unsigned int m,
+		const unsigned int y, const unsigned int k);
+  void set_gray(const unsigned int g);
+	  
+  // set color from a color string
+  int read_rgb(const char * const s);
+  int read_cmy(const char * const s);
+  int read_cmyk(const char * const s);
+  int read_gray(const char * const s);
+
+  // Return the actual color scheme and retrieve the color components
+  // into a predefined vector (of length at least 4).
+  color_scheme get_components(unsigned int *c) const;
+
+  // retrieve the components of a color
+  void get_rgb(unsigned int *r, unsigned int *g, unsigned int *b) const;
+  void get_cmy(unsigned int *c, unsigned int *m, unsigned int *y) const;
+  void get_cmyk(unsigned int *c, unsigned int *m,
+		unsigned int *y, unsigned int *k) const;
+  void get_gray(unsigned int *g) const;
+
+  char *print_color();
+};
+
+#define Cyan components[0]
+#define Magenta components[1]
+#define Yellow components[2]
+#define Black components[3]
+
+#define Red components[0]
+#define Green components[1]
+#define Blue components[2]
+
+#define Gray components[0]
+
+extern color default_color;
diff --git a/src/include/config.hin b/src/include/config.hin
new file mode 100644
index 0000000..374b4c6
--- /dev/null
+++ b/src/include/config.hin
@@ -0,0 +1,1584 @@
+/* src/include/config.hin.  Generated from configure.ac by autoheader.  */
+
+/* Define if building universal (internal helper macro) */
+#undef AC_APPLE_UNIVERSAL_BUILD
+
+/* Define to the number of bits in type 'ptrdiff_t'. */
+#undef BITSIZEOF_PTRDIFF_T
+
+/* Define to the number of bits in type 'sig_atomic_t'. */
+#undef BITSIZEOF_SIG_ATOMIC_T
+
+/* Define to the number of bits in type 'size_t'. */
+#undef BITSIZEOF_SIZE_T
+
+/* Define to the number of bits in type 'wchar_t'. */
+#undef BITSIZEOF_WCHAR_T
+
+/* Define to the number of bits in type 'wint_t'. */
+#undef BITSIZEOF_WINT_T
+
+/* Define if you wish *printf() functions that have a safe handling of
+   non-IEEE-754 'long double' values. */
+#undef CHECK_PRINTF_SAFE
+
+/* Define to 1 if using 'alloca.c'. */
+#undef C_ALLOCA
+
+/* Define as the bit index in the word where to find bit 0 of the exponent of
+   'double'. */
+#undef DBL_EXPBIT0_BIT
+
+/* Define as the word index where to find the exponent of 'double'. */
+#undef DBL_EXPBIT0_WORD
+
+/* Define as the bit index in the word where to find the sign of 'double'. */
+#undef DBL_SIGNBIT_BIT
+
+/* Define as the word index where to find the sign of 'double'. */
+#undef DBL_SIGNBIT_WORD
+
+/* Define as the bit index in the word where to find bit 0 of the exponent of
+   'float'. */
+#undef FLT_EXPBIT0_BIT
+
+/* Define as the word index where to find the exponent of 'float'. */
+#undef FLT_EXPBIT0_WORD
+
+/* Define as the bit index in the word where to find the sign of 'float'. */
+#undef FLT_SIGNBIT_BIT
+
+/* Define as the word index where to find the sign of 'float'. */
+#undef FLT_SIGNBIT_WORD
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module fscanf shall be considered present. */
+#undef GNULIB_FSCANF
+
+/* Define to 1 if printf and friends should be labeled with attribute
+   "__gnu_printf__" instead of "__printf__" */
+#undef GNULIB_PRINTF_ATTRIBUTE_FLAVOR_GNU
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module scanf shall be considered present. */
+#undef GNULIB_SCANF
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module snprintf shall be considered present. */
+#undef GNULIB_SNPRINTF
+
+/* Define to 1 when the gnulib module fgetc should be tested. */
+#undef GNULIB_TEST_FGETC
+
+/* Define to 1 when the gnulib module fgets should be tested. */
+#undef GNULIB_TEST_FGETS
+
+/* Define to 1 when the gnulib module fprintf should be tested. */
+#undef GNULIB_TEST_FPRINTF
+
+/* Define to 1 when the gnulib module fprintf-posix should be tested. */
+#undef GNULIB_TEST_FPRINTF_POSIX
+
+/* Define to 1 when the gnulib module fputc should be tested. */
+#undef GNULIB_TEST_FPUTC
+
+/* Define to 1 when the gnulib module fputs should be tested. */
+#undef GNULIB_TEST_FPUTS
+
+/* Define to 1 when the gnulib module fread should be tested. */
+#undef GNULIB_TEST_FREAD
+
+/* Define to 1 when the gnulib module free-posix should be tested. */
+#undef GNULIB_TEST_FREE_POSIX
+
+/* Define to 1 when the gnulib module frexp should be tested. */
+#undef GNULIB_TEST_FREXP
+
+/* Define to 1 when the gnulib module frexpl should be tested. */
+#undef GNULIB_TEST_FREXPL
+
+/* Define to 1 when the gnulib module fscanf should be tested. */
+#undef GNULIB_TEST_FSCANF
+
+/* Define to 1 when the gnulib module fwrite should be tested. */
+#undef GNULIB_TEST_FWRITE
+
+/* Define to 1 when the gnulib module getc should be tested. */
+#undef GNULIB_TEST_GETC
+
+/* Define to 1 when the gnulib module getchar should be tested. */
+#undef GNULIB_TEST_GETCHAR
+
+/* Define to 1 when the gnulib module memchr should be tested. */
+#undef GNULIB_TEST_MEMCHR
+
+/* Define to 1 when the gnulib module printf should be tested. */
+#undef GNULIB_TEST_PRINTF
+
+/* Define to 1 when the gnulib module putc should be tested. */
+#undef GNULIB_TEST_PUTC
+
+/* Define to 1 when the gnulib module putchar should be tested. */
+#undef GNULIB_TEST_PUTCHAR
+
+/* Define to 1 when the gnulib module puts should be tested. */
+#undef GNULIB_TEST_PUTS
+
+/* Define to 1 when the gnulib module scanf should be tested. */
+#undef GNULIB_TEST_SCANF
+
+/* Define to 1 when the gnulib module signbit should be tested. */
+#undef GNULIB_TEST_SIGNBIT
+
+/* Define to 1 when the gnulib module snprintf should be tested. */
+#undef GNULIB_TEST_SNPRINTF
+
+/* Define to 1 when the gnulib module vfprintf should be tested. */
+#undef GNULIB_TEST_VFPRINTF
+
+/* Define to 1 when the gnulib module vprintf should be tested. */
+#undef GNULIB_TEST_VPRINTF
+
+/* Define to 1 when the gnulib module vsnprintf should be tested. */
+#undef GNULIB_TEST_VSNPRINTF
+
+/* Define to 1 when the gnulib module wcwidth should be tested. */
+#undef GNULIB_TEST_WCWIDTH
+
+/* Define to 1 if you have 'alloca' after including <alloca.h>, a header that
+   may be supplied by this distribution. */
+#undef HAVE_ALLOCA
+
+/* Define to 1 if <alloca.h> works. */
+#undef HAVE_ALLOCA_H
+
+/* Define to 1 if you have the <bp-sym.h> header file. */
+#undef HAVE_BP_SYM_H
+
+/* Define if you have a C++ <inttypes.h>. */
+#undef HAVE_CC_INTTYPES_H
+
+/* Define if you have a C++ <limits.h>. */
+#undef HAVE_CC_LIMITS_H
+
+/* Define if you have a C++ <osfcn.h>. */
+#undef HAVE_CC_OSFCN_H
+
+/* Define if the copysignf function is declared in <math.h> and available in
+   libc. */
+#undef HAVE_COPYSIGNF_IN_LIBC
+
+/* Define if the copysignl function is declared in <math.h> and available in
+   libc. */
+#undef HAVE_COPYSIGNL_IN_LIBC
+
+/* Define if the copysign function is declared in <math.h> and available in
+   libc. */
+#undef HAVE_COPYSIGN_IN_LIBC
+
+/* Define to 1 if you have the <crtdefs.h> header file. */
+#undef HAVE_CRTDEFS_H
+
+/* Define to 1 if the static_assert keyword works. */
+#undef HAVE_C_STATIC_ASSERT
+
+/* Define to 1 if you have the declaration of `alarm', and to 0 if you don't.
+   */
+#undef HAVE_DECL_ALARM
+
+/* Define to 1 if you have the declaration of `copysign', and to 0 if you
+   don't. */
+#undef HAVE_DECL_COPYSIGN
+
+/* Define to 1 if you have the declaration of `copysignf', and to 0 if you
+   don't. */
+#undef HAVE_DECL_COPYSIGNF
+
+/* Define to 1 if you have the declaration of `copysignl', and to 0 if you
+   don't. */
+#undef HAVE_DECL_COPYSIGNL
+
+/* Define to 1 if you have the declaration of `ecvt', and to 0 if you don't.
+   */
+#undef HAVE_DECL_ECVT
+
+/* Define to 1 if you have the declaration of `execvpe', and to 0 if you
+   don't. */
+#undef HAVE_DECL_EXECVPE
+
+/* Define to 1 if you have the declaration of `fcloseall', and to 0 if you
+   don't. */
+#undef HAVE_DECL_FCLOSEALL
+
+/* Define to 1 if you have the declaration of `fcvt', and to 0 if you don't.
+   */
+#undef HAVE_DECL_FCVT
+
+/* Define to 1 if you have the declaration of `gcvt', and to 0 if you don't.
+   */
+#undef HAVE_DECL_GCVT
+
+/* Define to 1 if you have the declaration of `getc_unlocked', and to 0 if you
+   don't. */
+#undef HAVE_DECL_GETC_UNLOCKED
+
+/* Define to 1 if you have the declaration of `getw', and to 0 if you don't.
+   */
+#undef HAVE_DECL_GETW
+
+/* Define to 1 if you have the declaration of `putw', and to 0 if you don't.
+   */
+#undef HAVE_DECL_PUTW
+
+/* Define to 1 if you have the declaration of `snprintf', and to 0 if you
+   don't. */
+#undef HAVE_DECL_SNPRINTF
+
+/* Define to 1 if you have the declaration of `strsignal', and to 0 if you
+   don't. */
+#undef HAVE_DECL_STRSIGNAL
+
+/* Define to 1 if you have the declaration of `sys_siglist', and to 0 if you
+   don't. */
+#undef HAVE_DECL_SYS_SIGLIST
+
+/* Define to 1 if you have the declaration of `towlower', and to 0 if you
+   don't. */
+#undef HAVE_DECL_TOWLOWER
+
+/* Define to 1 if you have the declaration of `vsnprintf', and to 0 if you
+   don't. */
+#undef HAVE_DECL_VSNPRINTF
+
+/* Define to 1 if you have the declaration of `wcsdup', and to 0 if you don't.
+   */
+#undef HAVE_DECL_WCSDUP
+
+/* Define to 1 if you have the declaration of `wcwidth', and to 0 if you
+   don't. */
+#undef HAVE_DECL_WCWIDTH
+
+/* Define to 1 if you have the declaration of `_snprintf', and to 0 if you
+   don't. */
+#undef HAVE_DECL__SNPRINTF
+
+/* Define to 1 if you have the <direct.h> header file. */
+#undef HAVE_DIRECT_H
+
+/* Define to 1 if you have the <dirent.h> header file. */
+#undef HAVE_DIRENT_H
+
+/* Define to 1 if you have the <features.h> header file. */
+#undef HAVE_FEATURES_H
+
+/* Define to 1 if you have the `fmod' function. */
+#undef HAVE_FMOD
+
+/* Define if the 'free' function is guaranteed to preserve errno. */
+#undef HAVE_FREE_POSIX
+
+/* Define if the frexpl function is available in libc. */
+#undef HAVE_FREXPL_IN_LIBC
+
+/* Define if the frexp function is available in libc. */
+#undef HAVE_FREXP_IN_LIBC
+
+/* Define to 1 if you have the `getcwd' function. */
+#undef HAVE_GETCWD
+
+/* Define to 1 if you have the `getpagesize' function. */
+#undef HAVE_GETPAGESIZE
+
+/* Define to 1 if you have the `gettimeofday' function. */
+#undef HAVE_GETTIMEOFDAY
+
+/* Define if you have the iconv() function and it works. */
+#undef HAVE_ICONV
+
+/* Define if you have the 'intmax_t' type in <stdint.h> or <inttypes.h>. */
+#undef HAVE_INTMAX_T
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#undef HAVE_INTTYPES_H
+
+/* Define if <inttypes.h> exists, doesn't clash with <sys/types.h>, and
+   declares uintmax_t. */
+#undef HAVE_INTTYPES_H_WITH_UINTMAX
+
+/* Define to 1 if you have the `isatty' function. */
+#undef HAVE_ISATTY
+
+/* Define if the isnan(double) function is available in libc. */
+#undef HAVE_ISNAND_IN_LIBC
+
+/* Define if the isnan(float) function is available in libc. */
+#undef HAVE_ISNANF_IN_LIBC
+
+/* Define if the isnan(long double) function is available in libc. */
+#undef HAVE_ISNANL_IN_LIBC
+
+/* Define to 1 if you have the `iswcntrl' function. */
+#undef HAVE_ISWCNTRL
+
+/* Define to 1 if you have the `kill' function. */
+#undef HAVE_KILL
+
+/* Define if you have <langinfo.h> and nl_langinfo(CODESET). */
+#undef HAVE_LANGINFO_CODESET
+
+/* Define if the ldexpl function is available in libc. */
+#undef HAVE_LDEXPL_IN_LIBC
+
+/* Define if the ldexp function is available in libc. */
+#undef HAVE_LDEXP_IN_LIBC
+
+/* Define to 1 if you have the <limits.h> header file. */
+#undef HAVE_LIMITS_H
+
+/* Define to 1 if the system has the type 'long long int'. */
+#undef HAVE_LONG_LONG_INT
+
+/* Define to 1 if mmap()'s MAP_ANONYMOUS flag is available after including
+   config.h and <sys/mman.h>. */
+#undef HAVE_MAP_ANONYMOUS
+
+/* Define to 1 if you have the <math.h> header file. */
+#undef HAVE_MATH_H
+
+/* Define to 1 if you have the `mbrtowc' function. */
+#undef HAVE_MBRTOWC
+
+/* Define to 1 if you have the <minix/config.h> header file. */
+#undef HAVE_MINIX_CONFIG_H
+
+/* Define if you have mkstemp(). */
+#undef HAVE_MKSTEMP
+
+/* Define to 1 if you have a working `mmap' system call. */
+#undef HAVE_MMAP
+
+/* Define to 1 if you have the `mprotect' function. */
+#undef HAVE_MPROTECT
+
+/* Define to 1 if you have the `nl_langinfo' function. */
+#undef HAVE_NL_LANGINFO
+
+/* Define to 1 if you have the <process.h> header file. */
+#undef HAVE_PROCESS_H
+
+/* Define to 1 if you have the `putenv' function. */
+#undef HAVE_PUTENV
+
+/* Define to 1 if you have the `rename' function. */
+#undef HAVE_RENAME
+
+/* Define to 1 if 'long double' and 'double' have the same representation. */
+#undef HAVE_SAME_LONG_DOUBLE_AS_DOUBLE
+
+/* Define to 1 if you have the `setlocale' function. */
+#undef HAVE_SETLOCALE
+
+/* Define to 1 if 'sig_atomic_t' is a signed integer type. */
+#undef HAVE_SIGNED_SIG_ATOMIC_T
+
+/* Define to 1 if 'wchar_t' is a signed integer type. */
+#undef HAVE_SIGNED_WCHAR_T
+
+/* Define to 1 if 'wint_t' is a signed integer type. */
+#undef HAVE_SIGNED_WINT_T
+
+/* Define to 1 if you have the `snprintf' function. */
+#undef HAVE_SNPRINTF
+
+/* Define if the return value of the snprintf function is the number of of
+   bytes (excluding the terminating NUL) that would have been produced if the
+   buffer had been large enough. */
+#undef HAVE_SNPRINTF_RETVAL_C99
+
+/* Define if the string produced by the snprintf function is always NUL
+   terminated. */
+#undef HAVE_SNPRINTF_TRUNCATION_C99
+
+/* Define to 1 if you have the <stdbool.h> header file. */
+#undef HAVE_STDBOOL_H
+
+/* Define to 1 if you have the <stddef.h> header file. */
+#undef HAVE_STDDEF_H
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#undef HAVE_STDINT_H
+
+/* Define if <stdint.h> exists, doesn't clash with <sys/types.h>, and declares
+   uintmax_t. */
+#undef HAVE_STDINT_H_WITH_UINTMAX
+
+/* Define to 1 if you have the <stdio.h> header file. */
+#undef HAVE_STDIO_H
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#undef HAVE_STDLIB_H
+
+/* Define to 1 if you have the `strcasecmp' function. */
+#undef HAVE_STRCASECMP
+
+/* Define to 1 if you have the `strdup' function. */
+#undef HAVE_STRDUP
+
+/* Define to 1 if you have the `strerror' function. */
+#undef HAVE_STRERROR
+
+/* Define to 1 if you have the <strings.h> header file. */
+#undef HAVE_STRINGS_H
+
+/* Define to 1 if you have the <string.h> header file. */
+#undef HAVE_STRING_H
+
+/* Define to 1 if you have the `strncasecmp' function. */
+#undef HAVE_STRNCASECMP
+
+/* Define to 1 if you have the `strnlen' function. */
+#undef HAVE_STRNLEN
+
+/* Define to 1 if you have the `strsep' function. */
+#undef HAVE_STRSEP
+
+/* Define to 1 if you have the `strtol' function. */
+#undef HAVE_STRTOL
+
+/* Define if <math.h> defines struct exception. */
+#undef HAVE_STRUCT_EXCEPTION
+
+/* Define to 1 if you have the `symlink' function. */
+#undef HAVE_SYMLINK
+
+/* Define to 1 if you have the <sys/bitypes.h> header file. */
+#undef HAVE_SYS_BITYPES_H
+
+/* Define to 1 if you have the <sys/dir.h> header file. */
+#undef HAVE_SYS_DIR_H
+
+/* Define if you have sys_errlist in <errno.h>, <stdio.h>, or <stdlib.h>. */
+#undef HAVE_SYS_ERRLIST
+
+/* Define to 1 if you have the <sys/inttypes.h> header file. */
+#undef HAVE_SYS_INTTYPES_H
+
+/* Define to 1 if you have the <sys/mman.h> header file. */
+#undef HAVE_SYS_MMAN_H
+
+/* Define if you have sys_nerr in <errno.h>, <stdio.h>, or <stdio.h>. */
+#undef HAVE_SYS_NERR
+
+/* Define to 1 if you have the <sys/param.h> header file. */
+#undef HAVE_SYS_PARAM_H
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#undef HAVE_SYS_STAT_H
+
+/* Define to 1 if you have the <sys/time.h> header file. */
+#undef HAVE_SYS_TIME_H
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#undef HAVE_SYS_TYPES_H
+
+/* Define to 1 if you have the `towlower' function. */
+#undef HAVE_TOWLOWER
+
+/* uchardet library availability */
+#undef HAVE_UCHARDET
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#undef HAVE_UNISTD_H
+
+/* Define to 1 if the system has the type 'unsigned long long int'. */
+#undef HAVE_UNSIGNED_LONG_LONG_INT
+
+/* Define to 1 if you have the `vasnprintf' function. */
+#undef HAVE_VASNPRINTF
+
+/* Define to 1 if you have the `vsnprintf' function. */
+#undef HAVE_VSNPRINTF
+
+/* Define to 1 if you have the <wchar.h> header file. */
+#undef HAVE_WCHAR_H
+
+/* Define if you have the 'wchar_t' type. */
+#undef HAVE_WCHAR_T
+
+/* Define to 1 if you have the `wcrtomb' function. */
+#undef HAVE_WCRTOMB
+
+/* Define to 1 if you have the `wcslen' function. */
+#undef HAVE_WCSLEN
+
+/* Define to 1 if you have the `wcsnlen' function. */
+#undef HAVE_WCSNLEN
+
+/* Define to 1 if you have the <wctype.h> header file. */
+#undef HAVE_WCTYPE_H
+
+/* Define to 1 if you have the `wcwidth' function. */
+#undef HAVE_WCWIDTH
+
+/* Define if you have the 'wint_t' type. */
+#undef HAVE_WINT_T
+
+/* Define to 1 if O_NOATIME works. */
+#undef HAVE_WORKING_O_NOATIME
+
+/* Define to 1 if O_NOFOLLOW works. */
+#undef HAVE_WORKING_O_NOFOLLOW
+
+/* Define to 1 if the system has the type `_Bool'. */
+#undef HAVE__BOOL
+
+/* Define to 1 if you have the `__fseterr' function. */
+#undef HAVE___FSETERR
+
+/* Define to 1 if ctype.h defines __header_inline. */
+#undef HAVE___HEADER_INLINE
+
+/* Please see the Gnulib manual for how to use these macros.
+
+   Suppress extern inline with HP-UX cc, as it appears to be broken; see
+   <https://lists.gnu.org/r/bug-texinfo/2013-02/msg00030.html>.
+
+   Suppress extern inline with Sun C in standards-conformance mode, as it
+   mishandles inline functions that call each other.  E.g., for 'inline void f
+   (void) { } inline void g (void) { f (); }', c99 incorrectly complains
+   'reference to static identifier "f" in extern inline function'.
+   This bug was observed with Oracle Developer Studio 12.6
+   (Sun C 5.15 SunOS_sparc 2017/05/30).
+
+   Suppress extern inline (with or without __attribute__ ((__gnu_inline__)))
+   on configurations that mistakenly use 'static inline' to implement
+   functions or macros in standard C headers like <ctype.h>.  For example,
+   if isdigit is mistakenly implemented via a static inline function,
+   a program containing an extern inline function that calls isdigit
+   may not work since the C standard prohibits extern inline functions
+   from calling static functions (ISO C 99 section 6.7.4.(3).
+   This bug is known to occur on:
+
+     OS X 10.8 and earlier; see:
+     https://lists.gnu.org/r/bug-gnulib/2012-12/msg00023.html
+
+     DragonFly; see
+     http://muscles.dragonflybsd.org/bulk/clang-master-potential/20141111_102002/logs/ah-tty-0.3.12.log
+
+     FreeBSD; see:
+     https://lists.gnu.org/r/bug-gnulib/2014-07/msg00104.html
+
+   OS X 10.9 has a macro __header_inline indicating the bug is fixed for C and
+   for clang but remains for g++; see <https://trac.macports.org/ticket/41033>.
+   Assume DragonFly and FreeBSD will be similar.
+
+   GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
+   inline semantics, unless -fgnu89-inline is used.  It defines a macro
+   __GNUC_STDC_INLINE__ to indicate this situation or a macro
+   __GNUC_GNU_INLINE__ to indicate the opposite situation.
+   GCC 4.2 with -std=c99 or -std=gnu99 implements the GNU C inline
+   semantics but warns, unless -fgnu89-inline is used:
+     warning: C99 inline functions are not supported; using GNU89
+     warning: to disable this warning use -fgnu89-inline or the gnu_inline function attribute
+   It defines a macro __GNUC_GNU_INLINE__ to indicate this situation.
+ */
+#if (((defined __APPLE__ && defined __MACH__) \
+      || defined __DragonFly__ || defined __FreeBSD__) \
+     && (defined HAVE___HEADER_INLINE \
+         ? (defined __cplusplus && defined __GNUC_STDC_INLINE__ \
+            && ! defined __clang__) \
+         : ((! defined _DONT_USE_CTYPE_INLINE_ \
+             && (defined __GNUC__ || defined __cplusplus)) \
+            || (defined _FORTIFY_SOURCE && 0 < _FORTIFY_SOURCE \
+                && defined __GNUC__ && ! defined __cplusplus))))
+# define _GL_EXTERN_INLINE_STDHEADER_BUG
+#endif
+#if ((__GNUC__ \
+      ? defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__ \
+      : (199901L <= __STDC_VERSION__ \
+         && !defined __HP_cc \
+         && !defined __PGI \
+         && !(defined __SUNPRO_C && __STDC__))) \
+     && !defined _GL_EXTERN_INLINE_STDHEADER_BUG)
+# define _GL_INLINE inline
+# define _GL_EXTERN_INLINE extern inline
+# define _GL_EXTERN_INLINE_IN_USE
+#elif (2 < __GNUC__ + (7 <= __GNUC_MINOR__) && !defined __STRICT_ANSI__ \
+       && !defined _GL_EXTERN_INLINE_STDHEADER_BUG)
+# if defined __GNUC_GNU_INLINE__ && __GNUC_GNU_INLINE__
+   /* __gnu_inline__ suppresses a GCC 4.2 diagnostic.  */
+#  define _GL_INLINE extern inline __attribute__ ((__gnu_inline__))
+# else
+#  define _GL_INLINE extern inline
+# endif
+# define _GL_EXTERN_INLINE extern
+# define _GL_EXTERN_INLINE_IN_USE
+#else
+# define _GL_INLINE _GL_UNUSED static
+# define _GL_EXTERN_INLINE _GL_UNUSED static
+#endif
+
+/* In GCC 4.6 (inclusive) to 5.1 (exclusive),
+   suppress bogus "no previous prototype for 'FOO'"
+   and "no previous declaration for 'FOO'" diagnostics,
+   when FOO is an inline function in the header; see
+   <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54113> and
+   <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63877>.  */
+#if __GNUC__ == 4 && 6 <= __GNUC_MINOR__
+# if defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__
+#  define _GL_INLINE_HEADER_CONST_PRAGMA
+# else
+#  define _GL_INLINE_HEADER_CONST_PRAGMA \
+     _Pragma ("GCC diagnostic ignored \"-Wsuggest-attribute=const\"")
+# endif
+# define _GL_INLINE_HEADER_BEGIN \
+    _Pragma ("GCC diagnostic push") \
+    _Pragma ("GCC diagnostic ignored \"-Wmissing-prototypes\"") \
+    _Pragma ("GCC diagnostic ignored \"-Wmissing-declarations\"") \
+    _GL_INLINE_HEADER_CONST_PRAGMA
+# define _GL_INLINE_HEADER_END \
+    _Pragma ("GCC diagnostic pop")
+#else
+# define _GL_INLINE_HEADER_BEGIN
+# define _GL_INLINE_HEADER_END
+#endif
+
+/* Define as const if the declaration of iconv() needs const. */
+#undef ICONV_CONST
+
+/* Define if the host's encoding is EBCDIC. */
+#undef IS_EBCDIC_HOST
+
+/* Define as the bit index in the word where to find bit 0 of the exponent of
+   'long double'. */
+#undef LDBL_EXPBIT0_BIT
+
+/* Define as the word index where to find the exponent of 'long double'. */
+#undef LDBL_EXPBIT0_WORD
+
+/* Define as the bit index in the word where to find the sign of 'long
+   double'. */
+#undef LDBL_SIGNBIT_BIT
+
+/* Define as the word index where to find the sign of 'long double'. */
+#undef LDBL_SIGNBIT_WORD
+
+/* Define if localtime() takes a long * not a time_t *. */
+#undef LONG_FOR_TIME_T
+
+/* Define to a substitute value for mmap()'s MAP_ANONYMOUS flag. */
+#undef MAP_ANONYMOUS
+
+/* Use GNU style printf and scanf.  */
+#ifndef __USE_MINGW_ANSI_STDIO
+# undef __USE_MINGW_ANSI_STDIO
+#endif
+
+
+/* Define if your C++ doesn't declare gettimeofday(). */
+#undef NEED_DECLARATION_GETTIMEOFDAY
+
+/* Define if your C++ doesn't declare pclose(). */
+#undef NEED_DECLARATION_PCLOSE
+
+/* Define if your C++ doesn't declare popen(). */
+#undef NEED_DECLARATION_POPEN
+
+/* Define if your C++ doesn't declare putenv(). */
+#undef NEED_DECLARATION_PUTENV
+
+/* Define if your C++ doesn't declare rand(). */
+#undef NEED_DECLARATION_RAND
+
+/* Define if your C++ doesn't declare srand(). */
+#undef NEED_DECLARATION_SRAND
+
+/* Define if your C++ doesn't declare strcasecmp(). */
+#undef NEED_DECLARATION_STRCASECMP
+
+/* Define if your C++ doesn't declare strncasecmp(). */
+#undef NEED_DECLARATION_STRNCASECMP
+
+/* Define if your C++ doesn't declare vfprintf(). */
+#undef NEED_DECLARATION_VFPRINTF
+
+/* Define if the vasnprintf implementation needs special code for the 'a' and
+   'A' directives. */
+#undef NEED_PRINTF_DIRECTIVE_A
+
+/* Define if the vasnprintf implementation needs special code for the 'F'
+   directive. */
+#undef NEED_PRINTF_DIRECTIVE_F
+
+/* Define if the vasnprintf implementation needs special code for the 'ls'
+   directive. */
+#undef NEED_PRINTF_DIRECTIVE_LS
+
+/* Define if the vasnprintf implementation needs special code for 'double'
+   arguments. */
+#undef NEED_PRINTF_DOUBLE
+
+/* Define if the vasnprintf implementation needs special code for surviving
+   out-of-memory conditions. */
+#undef NEED_PRINTF_ENOMEM
+
+/* Define if the vasnprintf implementation needs special code for the ' flag.
+   */
+#undef NEED_PRINTF_FLAG_GROUPING
+
+/* Define if the vasnprintf implementation needs special code for the '-'
+   flag. */
+#undef NEED_PRINTF_FLAG_LEFTADJUST
+
+/* Define if the vasnprintf implementation needs special code for the 0 flag.
+   */
+#undef NEED_PRINTF_FLAG_ZERO
+
+/* Define if the vasnprintf implementation needs special code for infinite
+   'double' arguments. */
+#undef NEED_PRINTF_INFINITE_DOUBLE
+
+/* Define if the vasnprintf implementation needs special code for infinite
+   'long double' arguments. */
+#undef NEED_PRINTF_INFINITE_LONG_DOUBLE
+
+/* Define if the vasnprintf implementation needs special code for 'long
+   double' arguments. */
+#undef NEED_PRINTF_LONG_DOUBLE
+
+/* Define if the vasnprintf implementation needs special code for supporting
+   large precisions without arbitrary bounds. */
+#undef NEED_PRINTF_UNBOUNDED_PRECISION
+
+/* Name of package */
+#undef PACKAGE
+
+/* Define to the address where bug reports for this package should be sent. */
+#undef PACKAGE_BUGREPORT
+
+/* Define to the full name of this package. */
+#undef PACKAGE_NAME
+
+/* Define to the full name and version of this package. */
+#undef PACKAGE_STRING
+
+/* Define to the one symbol short name of this package. */
+#undef PACKAGE_TARNAME
+
+/* Define to the home page for this package. */
+#undef PACKAGE_URL
+
+/* Define to the version of this package. */
+#undef PACKAGE_VERSION
+
+/* Define to l, ll, u, ul, ull, etc., as suitable for constants of type
+   'ptrdiff_t'. */
+#undef PTRDIFF_T_SUFFIX
+
+/* Define if fprintf is overridden by a POSIX compliant gnulib implementation.
+   */
+#undef REPLACE_FPRINTF_POSIX
+
+/* Define if vasnprintf exists but is overridden by gnulib. */
+#undef REPLACE_VASNPRINTF
+
+/* Define as the return type of signal handlers ('int' or 'void'). */
+#undef RETSIGTYPE
+
+/* Define if srand() returns void not int. */
+#undef RET_TYPE_SRAND_IS_VOID
+
+/* Define to l, ll, u, ul, ull, etc., as suitable for constants of type
+   'sig_atomic_t'. */
+#undef SIG_ATOMIC_T_SUFFIX
+
+/* Define as the maximum value of type 'size_t', if the system doesn't define
+   it. */
+#ifndef SIZE_MAX
+# undef SIZE_MAX
+#endif
+
+/* Define to l, ll, u, ul, ull, etc., as suitable for constants of type
+   'size_t'. */
+#undef SIZE_T_SUFFIX
+
+/* If using the C implementation of alloca, define if you know the
+   direction of stack growth for your system; otherwise it will be
+   automatically deduced at runtime.
+	STACK_DIRECTION > 0 => grows toward higher addresses
+	STACK_DIRECTION < 0 => grows toward lower addresses
+	STACK_DIRECTION = 0 => direction of growth unknown */
+#undef STACK_DIRECTION
+
+/* Define to 1 if all of the C90 standard headers exist (not just the ones
+   required in a freestanding environment). This macro is provided for
+   backward compatibility; new code need not use it. */
+#undef STDC_HEADERS
+
+/* Enable extensions on AIX 3, Interix.  */
+#ifndef _ALL_SOURCE
+# undef _ALL_SOURCE
+#endif
+/* Enable general extensions on macOS.  */
+#ifndef _DARWIN_C_SOURCE
+# undef _DARWIN_C_SOURCE
+#endif
+/* Enable general extensions on Solaris.  */
+#ifndef __EXTENSIONS__
+# undef __EXTENSIONS__
+#endif
+/* Enable GNU extensions on systems that have them.  */
+#ifndef _GNU_SOURCE
+# undef _GNU_SOURCE
+#endif
+/* Enable X/Open compliant socket functions that do not require linking
+   with -lxnet on HP-UX 11.11.  */
+#ifndef _HPUX_ALT_XOPEN_SOCKET_API
+# undef _HPUX_ALT_XOPEN_SOCKET_API
+#endif
+/* Identify the host operating system as Minix.
+   This macro does not affect the system headers' behavior.
+   A future release of Autoconf may stop defining this macro.  */
+#ifndef _MINIX
+# undef _MINIX
+#endif
+/* Enable general extensions on NetBSD.
+   Enable NetBSD compatibility extensions on Minix.  */
+#ifndef _NETBSD_SOURCE
+# undef _NETBSD_SOURCE
+#endif
+/* Enable OpenBSD compatibility extensions on NetBSD.
+   Oddly enough, this does nothing on OpenBSD.  */
+#ifndef _OPENBSD_SOURCE
+# undef _OPENBSD_SOURCE
+#endif
+/* Define to 1 if needed for POSIX-compatible behavior.  */
+#ifndef _POSIX_SOURCE
+# undef _POSIX_SOURCE
+#endif
+/* Define to 2 if needed for POSIX-compatible behavior.  */
+#ifndef _POSIX_1_SOURCE
+# undef _POSIX_1_SOURCE
+#endif
+/* Enable POSIX-compatible threading on Solaris.  */
+#ifndef _POSIX_PTHREAD_SEMANTICS
+# undef _POSIX_PTHREAD_SEMANTICS
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-5:2014.  */
+#ifndef __STDC_WANT_IEC_60559_ATTRIBS_EXT__
+# undef __STDC_WANT_IEC_60559_ATTRIBS_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-1:2014.  */
+#ifndef __STDC_WANT_IEC_60559_BFP_EXT__
+# undef __STDC_WANT_IEC_60559_BFP_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-2:2015.  */
+#ifndef __STDC_WANT_IEC_60559_DFP_EXT__
+# undef __STDC_WANT_IEC_60559_DFP_EXT__
+#endif
+/* Enable extensions specified by C23 Annex F.  */
+#ifndef __STDC_WANT_IEC_60559_EXT__
+# undef __STDC_WANT_IEC_60559_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-4:2015.  */
+#ifndef __STDC_WANT_IEC_60559_FUNCS_EXT__
+# undef __STDC_WANT_IEC_60559_FUNCS_EXT__
+#endif
+/* Enable extensions specified by C23 Annex H and ISO/IEC TS 18661-3:2015.  */
+#ifndef __STDC_WANT_IEC_60559_TYPES_EXT__
+# undef __STDC_WANT_IEC_60559_TYPES_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TR 24731-2:2010.  */
+#ifndef __STDC_WANT_LIB_EXT2__
+# undef __STDC_WANT_LIB_EXT2__
+#endif
+/* Enable extensions specified by ISO/IEC 24747:2009.  */
+#ifndef __STDC_WANT_MATH_SPEC_FUNCS__
+# undef __STDC_WANT_MATH_SPEC_FUNCS__
+#endif
+/* Enable extensions on HP NonStop.  */
+#ifndef _TANDEM_SOURCE
+# undef _TANDEM_SOURCE
+#endif
+/* Enable X/Open extensions.  Define to 500 only if necessary
+   to make mbstate_t available.  */
+#ifndef _XOPEN_SOURCE
+# undef _XOPEN_SOURCE
+#endif
+
+
+/* Version number of package */
+#undef VERSION
+
+/* Define to l, ll, u, ul, ull, etc., as suitable for constants of type
+   'wchar_t'. */
+#undef WCHAR_T_SUFFIX
+
+/* Define if the 0200 bit of the status returned by wait() indicates whether a
+   core image was produced for a process that was terminated by a signal. */
+#undef WCOREFLAG
+
+/* Define to l, ll, u, ul, ull, etc., as suitable for constants of type
+   'wint_t'. */
+#undef WINT_T_SUFFIX
+
+/* Define WORDS_BIGENDIAN to 1 if your processor stores words with the most
+   significant byte first (like Motorola and SPARC, unlike Intel). */
+#if defined AC_APPLE_UNIVERSAL_BUILD
+# if defined __BIG_ENDIAN__
+#  define WORDS_BIGENDIAN 1
+# endif
+#else
+# ifndef WORDS_BIGENDIAN
+#  undef WORDS_BIGENDIAN
+# endif
+#endif
+
+/* Define to 1 if the X Window System is missing or not being used. */
+#undef X_DISPLAY_MISSING
+
+/* True if the compiler says it groks GNU C version MAJOR.MINOR.  */
+#if defined __GNUC__ && defined __GNUC_MINOR__
+# define _GL_GNUC_PREREQ(major, minor) \
+    ((major) < __GNUC__ + ((minor) <= __GNUC_MINOR__))
+#else
+# define _GL_GNUC_PREREQ(major, minor) 0
+#endif
+
+
+/* Define to enable the declarations of ISO C 11 types and functions. */
+#undef _ISOC11_SOURCE
+
+/* The _Noreturn keyword of C11.  */
+#ifndef _Noreturn
+# if (defined __cplusplus \
+      && ((201103 <= __cplusplus && !(__GNUC__ == 4 && __GNUC_MINOR__ == 7)) \
+          || (defined _MSC_VER && 1900 <= _MSC_VER)) \
+      && 0)
+    /* [[noreturn]] is not practically usable, because with it the syntax
+         extern _Noreturn void func (...);
+       would not be valid; such a declaration would only be valid with 'extern'
+       and '_Noreturn' swapped, or without the 'extern' keyword.  However, some
+       AIX system header files and several gnulib header files use precisely
+       this syntax with 'extern'.  */
+#  define _Noreturn [[noreturn]]
+# elif (defined __clang__ && __clang_major__ < 16 \
+        && defined _GL_WORK_AROUND_LLVM_BUG_59792)
+   /* Compile with -D_GL_WORK_AROUND_LLVM_BUG_59792 to work around
+      that rare LLVM bug, though you may get many false-alarm warnings.  */
+#  define _Noreturn
+# elif ((!defined __cplusplus || defined __clang__) \
+        && (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) \
+            || (!defined __STRICT_ANSI__ \
+                && (_GL_GNUC_PREREQ (4, 7) \
+                    || (defined __apple_build_version__ \
+                        ? 6000000 <= __apple_build_version__ \
+                        : 3 < __clang_major__ + (5 <= __clang_minor__))))))
+   /* _Noreturn works as-is.  */
+# elif _GL_GNUC_PREREQ (2, 8) || defined __clang__ || 0x5110 <= __SUNPRO_C
+#  define _Noreturn __attribute__ ((__noreturn__))
+# elif 1200 <= (defined _MSC_VER ? _MSC_VER : 0)
+#  define _Noreturn __declspec (noreturn)
+# else
+#  define _Noreturn
+# endif
+#endif
+
+
+/* Define if -D_POSIX_SOURCE is necessary. */
+#undef _POSIX_SOURCE
+
+/* Define if you have ISC 3.x or 4.x. */
+#undef _SYSV3
+
+/* For standard stat data types on VMS. */
+#undef _USE_STD_STAT
+
+/* Define to 1 if the system <stdint.h> predates C++11. */
+#undef __STDC_CONSTANT_MACROS
+
+/* Define to 1 if the system <stdint.h> predates C++11. */
+#undef __STDC_LIMIT_MACROS
+
+/* The _GL_ASYNC_SAFE marker should be attached to functions that are
+   signal handlers (for signals other than SIGABRT, SIGPIPE) or can be
+   invoked from such signal handlers.  Such functions have some restrictions:
+     * All functions that it calls should be marked _GL_ASYNC_SAFE as well,
+       or should be listed as async-signal-safe in POSIX
+       <https://pubs.opengroup.org/onlinepubs/9699919799/functions/V2_chap02.html#tag_15_04>
+       section 2.4.3.  Note that malloc(), sprintf(), and fwrite(), in
+       particular, are NOT async-signal-safe.
+     * All memory locations (variables and struct fields) that these functions
+       access must be marked 'volatile'.  This holds for both read and write
+       accesses.  Otherwise the compiler might optimize away stores to and
+       reads from such locations that occur in the program, depending on its
+       data flow analysis.  For example, when the program contains a loop
+       that is intended to inspect a variable set from within a signal handler
+           while (!signal_occurred)
+             ;
+       the compiler is allowed to transform this into an endless loop if the
+       variable 'signal_occurred' is not declared 'volatile'.
+   Additionally, recall that:
+     * A signal handler should not modify errno (except if it is a handler
+       for a fatal signal and ends by raising the same signal again, thus
+       provoking the termination of the process).  If it invokes a function
+       that may clobber errno, it needs to save and restore the value of
+       errno.  */
+#define _GL_ASYNC_SAFE
+
+
+/* Attributes.  */
+#if (defined __has_attribute \
+     && (!defined __clang_minor__ \
+         || (defined __apple_build_version__ \
+             ? 6000000 <= __apple_build_version__ \
+             : 5 <= __clang_major__)))
+# define _GL_HAS_ATTRIBUTE(attr) __has_attribute (__##attr##__)
+#else
+# define _GL_HAS_ATTRIBUTE(attr) _GL_ATTR_##attr
+# define _GL_ATTR_alloc_size _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_always_inline _GL_GNUC_PREREQ (3, 2)
+# define _GL_ATTR_artificial _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_cold _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_const _GL_GNUC_PREREQ (2, 95)
+# define _GL_ATTR_deprecated _GL_GNUC_PREREQ (3, 1)
+# define _GL_ATTR_diagnose_if 0
+# define _GL_ATTR_error _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_externally_visible _GL_GNUC_PREREQ (4, 1)
+# define _GL_ATTR_fallthrough _GL_GNUC_PREREQ (7, 0)
+# define _GL_ATTR_format _GL_GNUC_PREREQ (2, 7)
+# define _GL_ATTR_leaf _GL_GNUC_PREREQ (4, 6)
+# define _GL_ATTR_malloc _GL_GNUC_PREREQ (3, 0)
+# ifdef _ICC
+#  define _GL_ATTR_may_alias 0
+# else
+#  define _GL_ATTR_may_alias _GL_GNUC_PREREQ (3, 3)
+# endif
+# define _GL_ATTR_noinline _GL_GNUC_PREREQ (3, 1)
+# define _GL_ATTR_nonnull _GL_GNUC_PREREQ (3, 3)
+# define _GL_ATTR_nonstring _GL_GNUC_PREREQ (8, 0)
+# define _GL_ATTR_nothrow _GL_GNUC_PREREQ (3, 3)
+# define _GL_ATTR_packed _GL_GNUC_PREREQ (2, 7)
+# define _GL_ATTR_pure _GL_GNUC_PREREQ (2, 96)
+# define _GL_ATTR_returns_nonnull _GL_GNUC_PREREQ (4, 9)
+# define _GL_ATTR_sentinel _GL_GNUC_PREREQ (4, 0)
+# define _GL_ATTR_unused _GL_GNUC_PREREQ (2, 7)
+# define _GL_ATTR_warn_unused_result _GL_GNUC_PREREQ (3, 4)
+#endif
+
+/* Disable GCC -Wpedantic if using __has_c_attribute and this is not C23+.  */
+#if (defined __has_c_attribute && _GL_GNUC_PREREQ (4, 6) \
+     && (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) <= 201710)
+# pragma GCC diagnostic ignored "-Wpedantic"
+#endif
+
+
+/* _GL_ATTRIBUTE_ALLOC_SIZE ((N)) declares that the Nth argument of the function
+   is the size of the returned memory block.
+   _GL_ATTRIBUTE_ALLOC_SIZE ((M, N)) declares that the Mth argument multiplied
+   by the Nth argument of the function is the size of the returned memory block.
+ */
+/* Applies to: function, pointer to function, function types.  */
+#ifndef _GL_ATTRIBUTE_ALLOC_SIZE
+# if _GL_HAS_ATTRIBUTE (alloc_size)
+#  define _GL_ATTRIBUTE_ALLOC_SIZE(args) __attribute__ ((__alloc_size__ args))
+# else
+#  define _GL_ATTRIBUTE_ALLOC_SIZE(args)
+# endif
+#endif
+
+/* _GL_ATTRIBUTE_ALWAYS_INLINE tells that the compiler should always inline the
+   function and report an error if it cannot do so.  */
+/* Applies to: function.  */
+#ifndef _GL_ATTRIBUTE_ALWAYS_INLINE
+# if _GL_HAS_ATTRIBUTE (always_inline)
+#  define _GL_ATTRIBUTE_ALWAYS_INLINE __attribute__ ((__always_inline__))
+# else
+#  define _GL_ATTRIBUTE_ALWAYS_INLINE
+# endif
+#endif
+
+/* _GL_ATTRIBUTE_ARTIFICIAL declares that the function is not important to show
+    in stack traces when debugging.  The compiler should omit the function from
+    stack traces.  */
+/* Applies to: function.  */
+#ifndef _GL_ATTRIBUTE_ARTIFICIAL
+# if _GL_HAS_ATTRIBUTE (artificial)
+#  define _GL_ATTRIBUTE_ARTIFICIAL __attribute__ ((__artificial__))
+# else
+#  define _GL_ATTRIBUTE_ARTIFICIAL
+# endif
+#endif
+
+/* _GL_ATTRIBUTE_COLD declares that the function is rarely executed.  */
+/* Applies to: functions.  */
+/* Avoid __attribute__ ((cold)) on MinGW; see thread starting at
+   <https://lists.gnu.org/r/emacs-devel/2019-04/msg01152.html>.
+   Also, Oracle Studio 12.6 requires 'cold' not '__cold__'.  */
+#ifndef _GL_ATTRIBUTE_COLD
+# if _GL_HAS_ATTRIBUTE (cold) && !defined __MINGW32__
+#  ifndef __SUNPRO_C
+#   define _GL_ATTRIBUTE_COLD __attribute__ ((__cold__))
+#  else
+#   define _GL_ATTRIBUTE_COLD __attribute__ ((cold))
+#  endif
+# else
+#  define _GL_ATTRIBUTE_COLD
+# endif
+#endif
+
+/* _GL_ATTRIBUTE_CONST declares that it is OK for a compiler to omit duplicate
+   calls to the function with the same arguments.
+   This attribute is safe for a function that neither depends on nor affects
+   observable state, and always returns exactly once - e.g., does not loop
+   forever, and does not call longjmp.
+   (This attribute is stricter than _GL_ATTRIBUTE_PURE.)  */
+/* Applies to: functions.  */
+#ifndef _GL_ATTRIBUTE_CONST
+# if _GL_HAS_ATTRIBUTE (const)
+#  define _GL_ATTRIBUTE_CONST __attribute__ ((__const__))
+# else
+#  define _GL_ATTRIBUTE_CONST
+# endif
+#endif
+
+/* _GL_ATTRIBUTE_DEALLOC (F, I) declares that the function returns pointers
+   that can be freed by passing them as the Ith argument to the
+   function F.
+   _GL_ATTRIBUTE_DEALLOC_FREE declares that the function returns pointers that
+   can be freed via 'free'; it can be used only after declaring 'free'.  */
+/* Applies to: functions.  Cannot be used on inline functions.  */
+#ifndef _GL_ATTRIBUTE_DEALLOC
+# if _GL_GNUC_PREREQ (11, 0)
+#  define _GL_ATTRIBUTE_DEALLOC(f, i) __attribute__ ((__malloc__ (f, i)))
+# else
+#  define _GL_ATTRIBUTE_DEALLOC(f, i)
+# endif
+#endif
+/* If gnulib's <string.h> or <wchar.h> has already defined this macro, continue
+   to use this earlier definition, since <stdlib.h> may not have been included
+   yet.  */
+#ifndef _GL_ATTRIBUTE_DEALLOC_FREE
+# if defined __cplusplus && defined __GNUC__ && !defined __clang__
+/* Work around GCC bug <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108231> */
+#  define _GL_ATTRIBUTE_DEALLOC_FREE \
+     _GL_ATTRIBUTE_DEALLOC ((void (*) (void *)) free, 1)
+# else
+#  define _GL_ATTRIBUTE_DEALLOC_FREE \
+     _GL_ATTRIBUTE_DEALLOC (free, 1)
+# endif
+#endif
+
+/* _GL_ATTRIBUTE_DEPRECATED: Declares that an entity is deprecated.
+   The compiler may warn if the entity is used.  */
+/* Applies to:
+     - function, variable,
+     - struct, union, struct/union member,
+     - enumeration, enumeration item,
+     - typedef,
+   in C++ also: namespace, class, template specialization.  */
+#ifndef _GL_ATTRIBUTE_DEPRECATED
+# ifdef __has_c_attribute
+#  if __has_c_attribute (__deprecated__)
+#   define _GL_ATTRIBUTE_DEPRECATED [[__deprecated__]]
+#  endif
+# endif
+# if !defined _GL_ATTRIBUTE_DEPRECATED && _GL_HAS_ATTRIBUTE (deprecated)
+#  define _GL_ATTRIBUTE_DEPRECATED __attribute__ ((__deprecated__))
+# endif
+# ifndef _GL_ATTRIBUTE_DEPRECATED
+#  define _GL_ATTRIBUTE_DEPRECATED
+# endif
+#endif
+
+/* _GL_ATTRIBUTE_ERROR(msg) requests an error if a function is called and
+   the function call is not optimized away.
+   _GL_ATTRIBUTE_WARNING(msg) requests a warning if a function is called and
+   the function call is not optimized away.  */
+/* Applies to: functions.  */
+#if !(defined _GL_ATTRIBUTE_ERROR && defined _GL_ATTRIBUTE_WARNING)
+# if _GL_HAS_ATTRIBUTE (error)
+#  define _GL_ATTRIBUTE_ERROR(msg) __attribute__ ((__error__ (msg)))
+#  define _GL_ATTRIBUTE_WARNING(msg) __attribute__ ((__warning__ (msg)))
+# elif _GL_HAS_ATTRIBUTE (diagnose_if)
+#  define _GL_ATTRIBUTE_ERROR(msg) __attribute__ ((__diagnose_if__ (1, msg, "error")))
+#  define _GL_ATTRIBUTE_WARNING(msg) __attribute__ ((__diagnose_if__ (1, msg, "warning")))
+# else
+#  define _GL_ATTRIBUTE_ERROR(msg)
+#  define _GL_ATTRIBUTE_WARNING(msg)
+# endif
+#endif
+
+/* _GL_ATTRIBUTE_EXTERNALLY_VISIBLE declares that the entity should remain
+   visible to debuggers etc., even with '-fwhole-program'.  */
+/* Applies to: functions, variables.  */
+#ifndef _GL_ATTRIBUTE_EXTERNALLY_VISIBLE
+# if _GL_HAS_ATTRIBUTE (externally_visible)
+#  define _GL_ATTRIBUTE_EXTERNALLY_VISIBLE __attribute__ ((externally_visible))
+# else
+#  define _GL_ATTRIBUTE_EXTERNALLY_VISIBLE
+# endif
+#endif
+
+/* _GL_ATTRIBUTE_FALLTHROUGH declares that it is not a programming mistake if
+   the control flow falls through to the immediately following 'case' or
+   'default' label.  The compiler should not warn in this case.  */
+/* Applies to: Empty statement (;), inside a 'switch' statement.  */
+/* Always expands to something.  */
+#ifndef _GL_ATTRIBUTE_FALLTHROUGH
+# ifdef __has_c_attribute
+#  if __has_c_attribute (__fallthrough__)
+#   define _GL_ATTRIBUTE_FALLTHROUGH [[__fallthrough__]]
+#  endif
+# endif
+# if !defined _GL_ATTRIBUTE_FALLTHROUGH && _GL_HAS_ATTRIBUTE (fallthrough)
+#  define _GL_ATTRIBUTE_FALLTHROUGH __attribute__ ((__fallthrough__))
+# endif
+# ifndef _GL_ATTRIBUTE_FALLTHROUGH
+#  define _GL_ATTRIBUTE_FALLTHROUGH ((void) 0)
+# endif
+#endif
+
+/* _GL_ATTRIBUTE_FORMAT ((ARCHETYPE, STRING-INDEX, FIRST-TO-CHECK))
+   declares that the STRING-INDEXth function argument is a format string of
+   style ARCHETYPE, which is one of:
+     printf, gnu_printf
+     scanf, gnu_scanf,
+     strftime, gnu_strftime,
+     strfmon,
+   or the same thing prefixed and suffixed with '__'.
+   If FIRST-TO-CHECK is not 0, arguments starting at FIRST-TO_CHECK
+   are suitable for the format string.  */
+/* Applies to: functions.  */
+#ifndef _GL_ATTRIBUTE_FORMAT
+# if _GL_HAS_ATTRIBUTE (format)
+#  define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
+# else
+#  define _GL_ATTRIBUTE_FORMAT(spec)
+# endif
+#endif
+
+/* _GL_ATTRIBUTE_LEAF declares that if the function is called from some other
+   compilation unit, it executes code from that unit only by return or by
+   exception handling.  This declaration lets the compiler optimize that unit
+   more aggressively.  */
+/* Applies to: functions.  */
+#ifndef _GL_ATTRIBUTE_LEAF
+# if _GL_HAS_ATTRIBUTE (leaf)
+#  define _GL_ATTRIBUTE_LEAF __attribute__ ((__leaf__))
+# else
+#  define _GL_ATTRIBUTE_LEAF
+# endif
+#endif
+
+/* _GL_ATTRIBUTE_MALLOC declares that the function returns a pointer to freshly
+   allocated memory.  */
+/* Applies to: functions.  */
+#ifndef _GL_ATTRIBUTE_MALLOC
+# if _GL_HAS_ATTRIBUTE (malloc)
+#  define _GL_ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
+# else
+#  define _GL_ATTRIBUTE_MALLOC
+# endif
+#endif
+
+/* _GL_ATTRIBUTE_MAY_ALIAS declares that pointers to the type may point to the
+   same storage as pointers to other types.  Thus this declaration disables
+   strict aliasing optimization.  */
+/* Applies to: types.  */
+/* Oracle Studio 12.6 mishandles may_alias despite __has_attribute OK.  */
+#ifndef _GL_ATTRIBUTE_MAY_ALIAS
+# if _GL_HAS_ATTRIBUTE (may_alias) && !defined __SUNPRO_C
+#  define _GL_ATTRIBUTE_MAY_ALIAS __attribute__ ((__may_alias__))
+# else
+#  define _GL_ATTRIBUTE_MAY_ALIAS
+# endif
+#endif
+
+/* _GL_ATTRIBUTE_MAYBE_UNUSED declares that it is not a programming mistake if
+   the entity is not used.  The compiler should not warn if the entity is not
+   used.  */
+/* Applies to:
+     - function, variable,
+     - struct, union, struct/union member,
+     - enumeration, enumeration item,
+     - typedef,
+   in C++ also: class.  */
+/* In C++ and C23, this is spelled [[__maybe_unused__]].
+   GCC's syntax is __attribute__ ((__unused__)).
+   clang supports both syntaxes.  Except that with clang ≥ 6, < 10, in C++ mode,
+   __has_c_attribute (__maybe_unused__) yields true but the use of
+   [[__maybe_unused__]] nevertheless produces a warning.  */
+#ifndef _GL_ATTRIBUTE_MAYBE_UNUSED
+# if defined __clang__ && defined __cplusplus
+#  if __clang_major__ >= 10
+#   define _GL_ATTRIBUTE_MAYBE_UNUSED [[__maybe_unused__]]
+#  endif
+# elif defined __has_c_attribute
+#  if __has_c_attribute (__maybe_unused__)
+#   define _GL_ATTRIBUTE_MAYBE_UNUSED [[__maybe_unused__]]
+#  endif
+# endif
+# ifndef _GL_ATTRIBUTE_MAYBE_UNUSED
+#  define _GL_ATTRIBUTE_MAYBE_UNUSED _GL_ATTRIBUTE_UNUSED
+# endif
+#endif
+/* Alternative spelling of this macro, for convenience and for
+   compatibility with glibc/include/libc-symbols.h.  */
+#define _GL_UNUSED _GL_ATTRIBUTE_MAYBE_UNUSED
+/* Earlier spellings of this macro.  */
+#define _UNUSED_PARAMETER_ _GL_ATTRIBUTE_MAYBE_UNUSED
+
+/* _GL_ATTRIBUTE_NODISCARD declares that the caller of the function should not
+   discard the return value.  The compiler may warn if the caller does not use
+   the return value, unless the caller uses something like ignore_value.  */
+/* Applies to: function, enumeration, class.  */
+#ifndef _GL_ATTRIBUTE_NODISCARD
+# if defined __clang__ && defined __cplusplus
+  /* With clang up to 15.0.6 (at least), in C++ mode, [[__nodiscard__]] produces
+     a warning.
+     The 1000 below means a yet unknown threshold.  When clang++ version X
+     starts supporting [[__nodiscard__]] without warning about it, you can
+     replace the 1000 with X.  */
+#  if __clang_major__ >= 1000
+#   define _GL_ATTRIBUTE_NODISCARD [[__nodiscard__]]
+#  endif
+# elif defined __has_c_attribute
+#  if __has_c_attribute (__nodiscard__)
+#   define _GL_ATTRIBUTE_NODISCARD [[__nodiscard__]]
+#  endif
+# endif
+# if !defined _GL_ATTRIBUTE_NODISCARD && _GL_HAS_ATTRIBUTE (warn_unused_result)
+#  define _GL_ATTRIBUTE_NODISCARD __attribute__ ((__warn_unused_result__))
+# endif
+# ifndef _GL_ATTRIBUTE_NODISCARD
+#  define _GL_ATTRIBUTE_NODISCARD
+# endif
+#endif
+
+/* _GL_ATTRIBUTE_NOINLINE tells that the compiler should not inline the
+   function.  */
+/* Applies to: functions.  */
+#ifndef _GL_ATTRIBUTE_NOINLINE
+# if _GL_HAS_ATTRIBUTE (noinline)
+#  define _GL_ATTRIBUTE_NOINLINE __attribute__ ((__noinline__))
+# else
+#  define _GL_ATTRIBUTE_NOINLINE
+# endif
+#endif
+
+/* _GL_ATTRIBUTE_NONNULL ((N1, N2,...)) declares that the arguments N1, N2,...
+   must not be NULL.
+   _GL_ATTRIBUTE_NONNULL () declares that all pointer arguments must not be
+   null.  */
+/* Applies to: functions.  */
+#ifndef _GL_ATTRIBUTE_NONNULL
+# if _GL_HAS_ATTRIBUTE (nonnull)
+#  define _GL_ATTRIBUTE_NONNULL(args) __attribute__ ((__nonnull__ args))
+# else
+#  define _GL_ATTRIBUTE_NONNULL(args)
+# endif
+#endif
+
+/* _GL_ATTRIBUTE_NONSTRING declares that the contents of a character array is
+   not meant to be NUL-terminated.  */
+/* Applies to: struct/union members and variables that are arrays of element
+   type '[[un]signed] char'.  */
+#ifndef _GL_ATTRIBUTE_NONSTRING
+# if _GL_HAS_ATTRIBUTE (nonstring)
+#  define _GL_ATTRIBUTE_NONSTRING __attribute__ ((__nonstring__))
+# else
+#  define _GL_ATTRIBUTE_NONSTRING
+# endif
+#endif
+
+/* There is no _GL_ATTRIBUTE_NORETURN; use _Noreturn instead.  */
+
+/* _GL_ATTRIBUTE_NOTHROW declares that the function does not throw exceptions.
+ */
+/* Applies to: functions.  */
+#ifndef _GL_ATTRIBUTE_NOTHROW
+# if _GL_HAS_ATTRIBUTE (nothrow) && !defined __cplusplus
+#  define _GL_ATTRIBUTE_NOTHROW __attribute__ ((__nothrow__))
+# else
+#  define _GL_ATTRIBUTE_NOTHROW
+# endif
+#endif
+
+/* _GL_ATTRIBUTE_PACKED declares:
+   For struct members: The member has the smallest possible alignment.
+   For struct, union, class: All members have the smallest possible alignment,
+   minimizing the memory required.  */
+/* Applies to: struct members, struct, union,
+   in C++ also: class.  */
+#ifndef _GL_ATTRIBUTE_PACKED
+# if _GL_HAS_ATTRIBUTE (packed)
+#  define _GL_ATTRIBUTE_PACKED __attribute__ ((__packed__))
+# else
+#  define _GL_ATTRIBUTE_PACKED
+# endif
+#endif
+
+/* _GL_ATTRIBUTE_PURE declares that It is OK for a compiler to omit duplicate
+   calls to the function with the same arguments if observable state is not
+   changed between calls.
+   This attribute is safe for a function that does not affect
+   observable state, and always returns exactly once.
+   (This attribute is looser than _GL_ATTRIBUTE_CONST.)  */
+/* Applies to: functions.  */
+#ifndef _GL_ATTRIBUTE_PURE
+# if _GL_HAS_ATTRIBUTE (pure)
+#  define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
+# else
+#  define _GL_ATTRIBUTE_PURE
+# endif
+#endif
+
+/* _GL_ATTRIBUTE_RETURNS_NONNULL declares that the function's return value is
+   a non-NULL pointer.  */
+/* Applies to: functions.  */
+#ifndef _GL_ATTRIBUTE_RETURNS_NONNULL
+# if _GL_HAS_ATTRIBUTE (returns_nonnull)
+#  define _GL_ATTRIBUTE_RETURNS_NONNULL __attribute__ ((__returns_nonnull__))
+# else
+#  define _GL_ATTRIBUTE_RETURNS_NONNULL
+# endif
+#endif
+
+/* _GL_ATTRIBUTE_SENTINEL(pos) declares that the variadic function expects a
+   trailing NULL argument.
+   _GL_ATTRIBUTE_SENTINEL () - The last argument is NULL (requires C99).
+   _GL_ATTRIBUTE_SENTINEL ((N)) - The (N+1)st argument from the end is NULL.  */
+/* Applies to: functions.  */
+#ifndef _GL_ATTRIBUTE_SENTINEL
+# if _GL_HAS_ATTRIBUTE (sentinel)
+#  define _GL_ATTRIBUTE_SENTINEL(pos) __attribute__ ((__sentinel__ pos))
+# else
+#  define _GL_ATTRIBUTE_SENTINEL(pos)
+# endif
+#endif
+
+/* A helper macro.  Don't use it directly.  */
+#ifndef _GL_ATTRIBUTE_UNUSED
+# if _GL_HAS_ATTRIBUTE (unused)
+#  define _GL_ATTRIBUTE_UNUSED __attribute__ ((__unused__))
+# else
+#  define _GL_ATTRIBUTE_UNUSED
+# endif
+#endif
+
+
+/* _GL_UNUSED_LABEL; declares that it is not a programming mistake if the
+   immediately preceding label is not used.  The compiler should not warn
+   if the label is not used.  */
+/* Applies to: label (both in C and C++).  */
+/* Note that g++ < 4.5 does not support the '__attribute__ ((__unused__)) ;'
+   syntax.  But clang does.  */
+#ifndef _GL_UNUSED_LABEL
+# if !(defined __cplusplus && !_GL_GNUC_PREREQ (4, 5)) || defined __clang__
+#  define _GL_UNUSED_LABEL _GL_ATTRIBUTE_UNUSED
+# else
+#  define _GL_UNUSED_LABEL
+# endif
+#endif
+
+
+/* Define to `__inline__' or `__inline' if that's what the C compiler
+   calls it, or to nothing if 'inline' is not supported under any name.  */
+#ifndef __cplusplus
+#undef inline
+#endif
+
+/* Define to long or long long if <stdint.h> and <inttypes.h> don't define. */
+#undef intmax_t
+
+/* Work around a bug in Apple GCC 4.0.1 build 5465: In C99 mode, it supports
+   the ISO C 99 semantics of 'extern inline' (unlike the GNU C semantics of
+   earlier versions), but does not display it by setting __GNUC_STDC_INLINE__.
+   __APPLE__ && __MACH__ test for Mac OS X.
+   __APPLE_CC__ tests for the Apple compiler and its version.
+   __STDC_VERSION__ tests for the C99 mode.  */
+#if defined __APPLE__ && defined __MACH__ && __APPLE_CC__ >= 5465 && !defined __cplusplus && __STDC_VERSION__ >= 199901L && !defined __GNUC_STDC_INLINE__
+# define __GNUC_STDC_INLINE__ 1
+#endif
+
+/* _GL_CMP (n1, n2) performs a three-valued comparison on n1 vs. n2, where
+   n1 and n2 are expressions without side effects, that evaluate to real
+   numbers (excluding NaN).
+   It returns
+     1  if n1 > n2
+     0  if n1 == n2
+     -1 if n1 < n2
+   The naïve code   (n1 > n2 ? 1 : n1 < n2 ? -1 : 0)  produces a conditional
+   jump with nearly all GCC versions up to GCC 10.
+   This variant     (n1 < n2 ? -1 : n1 > n2)  produces a conditional with many
+   GCC versions up to GCC 9.
+   The better code  (n1 > n2) - (n1 < n2)  from Hacker's Delight § 2-9
+   avoids conditional jumps in all GCC versions >= 3.4.  */
+#define _GL_CMP(n1, n2) (((n1) > (n2)) - ((n1) < (n2)))
+
+
+/* Define to `int' if <sys/types.h> does not define. */
+#undef mode_t
+
+/* Define as a signed integer type capable of holding a process identifier. */
+#undef pid_t
+
+/* Define as the type of the result of subtracting two pointers, if the system
+   doesn't define it. */
+#undef ptrdiff_t
+
+/* Define to the equivalent of the C99 'restrict' keyword, or to
+   nothing if this is not supported.  Do not define if restrict is
+   supported only directly.  */
+#undef restrict
+/* Work around a bug in older versions of Sun C++, which did not
+   #define __restrict__ or support _Restrict or __restrict__
+   even though the corresponding Sun C compiler ended up with
+   "#define restrict _Restrict" or "#define restrict __restrict__"
+   in the previous line.  This workaround can be removed once
+   we assume Oracle Developer Studio 12.5 (2016) or later.  */
+#if defined __SUNPRO_CC && !defined __RESTRICT && !defined __restrict__
+# define _Restrict
+# define __restrict__
+#endif
+
+/* Define to `unsigned int' if <sys/types.h> does not define. */
+#undef size_t
+
+/* Define as a signed type of the same size as size_t. */
+#undef ssize_t
+
+/* Define uintmax_t to 'unsigned long' or 'unsigned long long' if <inttypes.h>
+   does not exist. */
+#undef uintmax_t
+
+
+  /* This definition is a duplicate of the one in unitypes.h.
+     It is here so that we can cope with an older version of unitypes.h
+     that does not contain this definition and that is pre-installed among
+     the public header files.  */
+  # if defined __restrict \
+       || 2 < __GNUC__ + (95 <= __GNUC_MINOR__) \
+       || __clang_major__ >= 3
+  #  define _UC_RESTRICT __restrict
+  # elif 199901L <= __STDC_VERSION__ || defined restrict
+  #  define _UC_RESTRICT restrict
+  # else
+  #  define _UC_RESTRICT
+  # endif
+  
+
+#if (!defined HAVE_C_STATIC_ASSERT && !defined assert \
+     && (!defined __cplusplus \
+         || (__cpp_static_assert < 201411 \
+             && __GNUG__ < 6 && __clang_major__ < 6)))
+ #include <assert.h>
+ #undef/**/assert
+ /* Solaris 11.4 <assert.h> defines static_assert as a macro with 2 arguments.
+    We need it also to be invocable with a single argument.  */
+ #if defined __sun && (__STDC_VERSION__ - 0 >= 201112L) && !defined __cplusplus
+  #undef/**/static_assert
+  #define static_assert _Static_assert
+ #endif
+#endif
diff --git a/src/include/cset.h b/src/include/cset.h
new file mode 100644
index 0000000..996e9a8
--- /dev/null
+++ b/src/include/cset.h
@@ -0,0 +1,74 @@
+// -*- C++ -*-
+/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CC_LIMITS_H
+#include <limits.h>
+#else /* not HAVE_CC_LIMITS_H */
+#ifndef UCHAR_MAX
+#define UCHAR_MAX 255
+#endif
+#endif /* not HAVE_CC_LIMITS_H */ 
+
+enum cset_builtin { CSET_BUILTIN };
+
+class cset {
+public:
+  cset();
+  cset(cset_builtin);
+  cset(const char *);
+  cset(const unsigned char *);
+  int operator()(unsigned char) const;
+
+  cset &operator|=(const cset &);
+  cset &operator|=(unsigned char);
+
+  friend class cset_init;
+private:
+  char v[UCHAR_MAX+1];
+  void clear();
+};
+
+inline int cset::operator()(unsigned char c) const
+{
+  return v[c];
+}
+
+inline cset &cset::operator|=(unsigned char c)
+{
+  v[c] = 1;
+  return *this;
+}
+
+extern cset csalpha;
+extern cset csupper;
+extern cset cslower;
+extern cset csdigit;
+extern cset csxdigit;
+extern cset csspace;
+extern cset cspunct;
+extern cset csalnum;
+extern cset csprint;
+extern cset csgraph;
+extern cset cscntrl;
+
+static class cset_init {
+  static int initialised;
+public:
+  cset_init();
+} _cset_init;
diff --git a/src/include/curtime.h b/src/include/curtime.h
new file mode 100644
index 0000000..5d3a24a
--- /dev/null
+++ b/src/include/curtime.h
@@ -0,0 +1,27 @@
+/* Copyright (C) 2015-2020 Free Software Foundation, Inc.
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+The GNU General Public License version 2 (GPL2) is available in the
+internet at <http://www.gnu.org/licenses/gpl-2.0.txt>. */
+
+#ifndef LONG_FOR_TIME_T
+#include <time.h>
+#endif
+
+#ifdef LONG_FOR_TIME_T
+long
+#else
+time_t
+#endif
+current_time();
diff --git a/src/include/device.h b/src/include/device.h
new file mode 100644
index 0000000..6543292
--- /dev/null
+++ b/src/include/device.h
@@ -0,0 +1,25 @@
+// -*- C++ -*-
+/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+// The target device.  Once initialized, the device doesn't change during
+// the entire program run.  Sample devices are 'ps' (for Postscript), 'html'
+// (for HTML), and 'ascii', 'latin1', 'utf8' for TTY output.
+extern const char *device;
+
+// end of device.h
diff --git a/src/include/driver.h b/src/include/driver.h
new file mode 100644
index 0000000..965ac1a
--- /dev/null
+++ b/src/include/driver.h
@@ -0,0 +1,38 @@
+/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#include "lib.h"
+
+#include <ctype.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <errno.h>
+#include <math.h>
+#include "errarg.h"
+#include "error.h"
+#include "font.h"
+#include "printer.h"
+#include "geometry.h"
+
+void do_file(const char *);
+
+// Local Variables:
+// fill-column: 72
+// mode: C++
+// End:
+// vim: set cindent noexpandtab shiftwidth=2 textwidth=72:
diff --git a/src/include/errarg.h b/src/include/errarg.h
new file mode 100644
index 0000000..67a5852
--- /dev/null
+++ b/src/include/errarg.h
@@ -0,0 +1,46 @@
+// -*- C++ -*-
+/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+class errarg {
+  enum { EMPTY, STRING, CHAR, INTEGER, UNSIGNED_INTEGER, DOUBLE } type;
+  union {
+    const char *s;
+    int n;
+    unsigned int u;
+    char c;
+    double d;
+  };
+ public:
+  errarg();
+  errarg(const char *);
+  errarg(char);
+  errarg(unsigned char);
+  errarg(int);
+  errarg(unsigned int);
+  errarg(double);
+  int empty() const;
+  void print() const;
+};
+
+extern errarg empty_errarg;
+
+extern void errprint(const char *,
+		     const errarg &arg1 = empty_errarg,
+		     const errarg &arg2 = empty_errarg,
+		     const errarg &arg3 = empty_errarg);
diff --git a/src/include/error.h b/src/include/error.h
new file mode 100644
index 0000000..77302f8
--- /dev/null
+++ b/src/include/error.h
@@ -0,0 +1,69 @@
+/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+void fatal_with_file_and_line(const char *, int, const char *,
+			      const errarg & = empty_errarg,
+			      const errarg & = empty_errarg,
+			      const errarg & = empty_errarg);
+
+void error_with_file_and_line(const char *, int, const char *,
+			      const errarg & = empty_errarg,
+			      const errarg & = empty_errarg,
+			      const errarg & = empty_errarg);
+
+void warning_with_file_and_line(const char *, int, const char *,
+				const errarg & = empty_errarg,
+				const errarg & = empty_errarg,
+				const errarg & = empty_errarg);
+
+void debug_with_file_and_line(const char *, int, const char *,
+			      const errarg & = empty_errarg,
+			      const errarg & = empty_errarg,
+			      const errarg & = empty_errarg);
+
+void fatal(const char *,
+	   const errarg & = empty_errarg,
+	   const errarg & = empty_errarg,
+	   const errarg & = empty_errarg);
+
+void error(const char *,
+	   const errarg & = empty_errarg,
+	   const errarg & = empty_errarg,
+	   const errarg & = empty_errarg);
+
+void warning(const char *,
+	     const errarg & = empty_errarg,
+	     const errarg & = empty_errarg,
+	     const errarg & = empty_errarg);
+
+void debug(const char *,
+	   const errarg & = empty_errarg,
+	   const errarg & = empty_errarg,
+	   const errarg & = empty_errarg);
+
+
+extern "C" const char *program_name;
+extern int current_lineno;
+extern const char *current_filename;
+extern const char *current_source_filename;
+
+// Local Variables:
+// fill-column: 72
+// mode: C++
+// End:
+// vim: set cindent noexpandtab shiftwidth=2 textwidth=72:
diff --git a/src/include/font.h b/src/include/font.h
new file mode 100644
index 0000000..68a82fa
--- /dev/null
+++ b/src/include/font.h
@@ -0,0 +1,343 @@
+// -*- C++ -*-
+/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+// A function of this type can be registered to define the semantics of
+// arbitrary commands in a font DESC file.
+typedef void (*FONT_COMMAND_HANDLER)(const char *,	// command
+				     const char *,	// arg
+				     const char *,	// file
+				     int);		// lineno
+
+// A glyph is represented by a font-independent 'glyph *' pointer.  The
+// functions name_to_glyph and number_to_glyph return such a pointer.
+//
+// There are two types of glyphs:
+//
+//   - those with a name, and among these in particular:
+//     'charNNN' denoting a single 'char' in the input character set,
+//     'uXXXX' denoting a Unicode character,
+//
+//   - those with a number, referring to the font-dependent glyph with
+//     the given number.
+
+// The statically allocated information about a glyph.
+//
+// This is an abstract class; only its subclass 'charinfo' is
+// instantiated.  'charinfo' exists in two versions: one in
+// roff/troff/input.cpp for troff, and one in
+// libs/libgroff/nametoindex.cpp for the preprocessors and the
+// postprocessors.
+struct glyph {
+  int index;			// A font-independent integer value.
+  int number;			// Glyph number or -1.
+  friend class character_indexer;
+};
+
+#define UNDEFINED_GLYPH ((glyph *) 0)
+
+// The next three functions exist in two versions: one in
+// roff/troff/input.cpp for troff, and one in
+// libs/libgroff/nametoindex.cpp for the preprocessors and the
+// postprocessors.
+extern glyph *name_to_glyph(const char *);	// Convert the glyph with
+			// the given name (arg1) to a 'glyph' object.  This
+			// has the same semantics as the groff escape sequence
+			// \C'name'.  If such a 'glyph' object does not yet
+			// exist, a new one is allocated.
+extern glyph *number_to_glyph(int);	// Convert the font-dependent glyph
+			// with the given number (in the font) to a 'glyph'
+			// object.  This has the same semantics as the groff
+			// escape sequence \N'number'.  If such a 'glyph'
+			// object does not yet exist, a new one is allocated.
+extern const char *glyph_to_name(glyph *);	// Convert the given
+			// glyph back to its name.  Return null pointer
+			// if the glyph doesn't have a name.
+inline int glyph_to_number(glyph *);	// Convert the given glyph back to
+			// its number.  Return -1 if it does not designate
+			// a numbered character.
+inline int glyph_to_index(glyph *);	// Return the unique index that is
+			// associated with the given glyph. It is >= 0.
+extern int glyph_to_unicode(glyph *);	// Convert the given glyph to its
+			// Unicode codepoint.  Return -1 if it does not
+			// designate a Unicode character.
+
+inline int glyph_to_number(glyph *g)
+{
+  return g->number;
+}
+
+inline int glyph_to_index(glyph *g)
+{
+  return g->index;
+}
+
+// Types used in non-public members of 'class font'.
+struct font_kern_list;
+struct font_char_metric;
+struct font_widths_cache;
+
+// A 'class font' instance represents the relevant information of a font of
+// the given device.  This includes the set of glyphs represented by the
+// font, and metrics for each glyph.
+class font {
+public:
+  enum {		// The valid argument values of 'has_ligature'.
+    LIG_ff = 1,
+    LIG_fi = 2,
+    LIG_fl = 4,
+    LIG_ffi = 8,
+    LIG_ffl = 16
+  };
+
+  virtual ~font();	// Destructor.
+  bool contains(glyph *);	// This font contains the given glyph.
+  bool is_special();	// This font is searched for glyphs not defined
+			// in the current font.  See section 'Special
+			// Fonts' in the groff Texinfo manual.  Used by
+			// make_glyph_node().
+  int get_width(glyph *, int);	// A rectangle represents the shape of the
+			// given glyph (arg1) at the given point size
+			// (arg2).  Return the horizontal dimension of this
+			// rectangle.
+  int get_height(glyph *, int);	// A rectangle represents the shape of the
+			// given glyph (arg1) at the given point size
+			// (arg2).  Return the distance between the base
+			// line and the top of this rectangle.
+			// This is often also called the 'ascent' of the
+			// glyph.  If the top is above the baseline, this
+			// value is positive.
+  int get_depth(glyph *, int);	// A rectangle represents the shape of the
+			// given glyph (arg1) at the given point size
+			// (arg2).  Return the distance between the base
+			// line and the bottom of this rectangle.
+			// This is often also called the 'descent' of the
+			// glyph.  If the bottom is below the baseline,
+			// this value is positive.
+  int get_space_width(int);	// Return the normal width of a space at the
+			// given point size.
+  int get_character_type(glyph *);	// Return a bit mask describing the
+			// shape of the given glyph.  Bit 0 is set if the
+			// character has a descender.  Bit 1 is set if the
+			// character has a tall glyph.  See groff manual,
+			// description of \w and the 'ct' register.
+  int get_kern(glyph *, glyph *, int);	// Return the kerning between the
+			// given glyphs (arg1 and arg2), both at the given
+			// point size (arg3).
+  int get_skew(glyph *, int, int);	// A rectangle represents the shape
+			// of the given glyph (arg1) at the given point size
+			// (arg2).  For slanted fonts like Times-Italic, the
+			// optical vertical axis is naturally slanted.  The
+			// natural slant value (measured in degrees;
+			// positive values mean aslant to the right) is
+			// specified in the font's description file (see
+			// member variable SLANT below).  In addition to
+			// this, any font can be artificially slanted.  This
+			// artificial slant value (arg3, measured in
+			// degrees; positive values mean a slant to the
+			// right) is specified with the \S escape.
+			//
+			// Return the skew value which is the horizontal
+			// distance between the upper left corner of the
+			// glyph box and the upper left corner of the glyph
+			// box thought to be slanted by the sum of the
+			// natural and artificial slant.  It basically means
+			// how much an accent must be shifted horizontally
+			// to put it on the optical axis of the glyph.
+  bool has_ligature(int);	// This font has the given ligature type
+			// (one of LIG_ff, LIG_fi, ...).
+  int get_italic_correction(glyph *, int);	// If the given glyph (arg1)
+			// at the given point size (arg2) is followed by an
+			// unslanted glyph, some horizontal white space may
+			// need to be inserted in between.  See the groff
+			// manual, description of \/.  Return the amount
+			// (width) of this white space.
+  int get_left_italic_correction(glyph *, int);	// If the given glyph (arg1)
+			// at the given point size (arg2) is preceded by an
+			// unslanted roman glyph, some horizontal white
+			// space may need to be inserted in between.  See
+			// the groff manual, description of \,.  Return the
+			// amount (width) of this white space.
+  int get_subscript_correction(glyph *, int);	// If the given glyph (arg1)
+			// at the given point size (arg2)is followed by a
+			// subscript glyph, the horizontal position may need
+			// to be advanced by some (possibly negative)
+			// amount.  See groff manual, description of \w and
+			// the 'ssc' register.  Return this amount.
+  void set_zoom(int);	// Set the font's zoom factor * 1000.  Must be a
+  			// non-negative value.
+  int get_zoom();	// Return the font's zoom factor * 1000.
+  int get_code(glyph *);	// Return the code point in the physical
+			// font of the given glyph.
+  const char *get_special_device_encoding(glyph *);	// Return
+			// special device-dependent information about
+			// the given glyph.  Return null pointer if
+			// there is no special information.
+  const char *get_name();	// Return the name of this font.
+  const char *get_internal_name();	// Return the 'internalname'
+			// attribute of this font or null pointer if it
+			// has none.
+  const char *get_image_generator();	// Return the 'image_generator'
+			// attribute of this font or null pointer if it
+			// has none.
+  static bool scan_papersize(const char *, const char **,
+			     double *, double *); // Parse the
+			// 'papersize' directive in the DESC file name
+			// given in arg1.  Update arg2 with the name
+			// of the paper format and arg3 and arg4 with
+			// its length and width, respectively.  Return
+			// whether paper size was successfully set.
+  static font *load_font(const char *, bool = false); // Load the font
+			// description file with the given name (arg1)
+			// and return a pointer to a 'font' object.  If
+			// arg2 is true, only the part of the font
+			// description file before the 'charset' and
+			// 'kernpairs' sections is loaded.  Return null
+			// pointer in case of failure.
+  static void command_line_font_dir(const char *);	// Prepend given
+			// path (arg1) to the list of directories in which
+			// to look up fonts.
+  static FILE *open_file(const char *, char **);	// Open
+			// a font file with the given name (arg1),
+			// searching along the current font path.  If
+			// arg2 points to a string pointer, set it to
+			// the found file name (this depends on the
+			// device also).  Return the opened file.  If
+			// not found, arg2 is unchanged, and a null
+			// pointer is returned.
+
+  // Open the DESC file (depending on the device) and initialize some
+  // static variables with info from there.
+  static const char *load_desc();
+  static FONT_COMMAND_HANDLER
+    set_unknown_desc_command_handler(FONT_COMMAND_HANDLER);	// Register
+			// a function which defines the semantics of
+			// arbitrary commands in the font DESC file.
+  // Now the variables from the DESC file, shared by all fonts.
+  static int res;	// The 'res' attribute given in the DESC file.
+  static int hor;	// The 'hor' attribute given in the DESC file.
+  static int vert;	// The 'vert' attribute given in the DESC file.
+  static int unitwidth;	// The 'unitwidth' attribute given in the DESC file.
+  static int paperwidth;	// The 'paperwidth' attribute given in the
+			// DESC file, or derived from the 'papersize'
+			// attribute given in the DESC file.
+  static int paperlength;	// The 'paperlength' attribute given in the
+			// DESC file, or derived from the 'papersize'
+			// attribute given in the DESC file.
+  static const char *papersize;
+  static int biggestfont;	// The 'biggestfont' attribute given in the
+			// DESC file.
+  static int spare2;
+  static int sizescale;	// The 'sizescale' attribute given in the DESC file.
+  static bool has_tcommand;	// DESC file has 'tcommand' directive.
+  static bool use_unscaled_charwidths;	// DESC file has
+			// 'unscaled_charwidths' directive.
+  static bool pass_filenames;	// DESC file has 'pass_filenames'
+			// directive.
+  static bool use_charnames_in_special;	// DESC file has
+			// 'use_charnames_in_special' directive.
+  static bool is_unicode; // DESC file has the 'unicode' directive.
+  static const char *image_generator;	// The 'image_generator' attribute
+			// given in the DESC file.
+  static const char **font_name_table;	// The 'fonts' attribute given
+			// in the DESC file, as a null
+			// pointer-terminated array of strings.
+  static const char **style_table;	// The 'styles' attribute given
+			// in the DESC file, as a null
+			// pointer-terminated array of strings.
+  static const char *family;	// The 'family' attribute given in the DESC
+			// file.
+  static int *sizes;	// The 'sizes' attribute given in the DESC file, as
+			// an array of intervals of the form { lower1,
+			// upper1, ... lowerN, upperN, 0 }.
+
+private:
+  unsigned ligatures;	// Bit mask of available ligatures.  Used by
+			// has_ligature().
+  font_kern_list **kern_hash_table;	// Hash table of kerning pairs.
+			// Used by get_kern().
+  int space_width;	// The normal width of a space.  Used by
+			// get_space_width().
+  bool special;		// See public is_special() above.
+  char *name;		// The name of this font.  Used by get_name().
+  char *internalname;	// The 'internalname' attribute of this font, or
+			// a null pointer.  Used by get_internal_name().
+  double slant;		// The natural slant angle (in degrees) of this font.
+  int zoom;		// The font's magnification, multiplied by 1000.
+			// Used by scale().  A zero value means 'no zoom'.
+  int *ch_index;	// Conversion table from font-independent character
+			// indices to indices for this particular font.
+  int nindices;
+  font_char_metric *ch;	// Metrics information for every character in this
+			// font (if !is_unicode) or for just some characters
+			// (if is_unicode).  The indices of this array are
+			// font-specific, found as values in ch_index[].
+  int ch_used;
+  int ch_size;
+  font_widths_cache *widths_cache;	// A cache of scaled character
+			// widths.  Used by the get_width() function.
+
+  static FONT_COMMAND_HANDLER unknown_desc_command_handler;	// A
+			// function defining the semantics of arbitrary
+			// commands in the DESC file.
+  enum { KERN_HASH_TABLE_SIZE = 503 };	// Size of the hash table of kerning
+			// pairs.
+
+  // These methods add new characters to the ch_index[] and ch[] arrays.
+  void add_entry(glyph *,			// glyph
+		 const font_char_metric &);	// metric
+  void copy_entry(glyph *,			// new_glyph
+		  glyph *);			// old_glyph
+  void alloc_ch_index(int);			// index
+  void extend_ch();
+  void compact();
+
+  void add_kern(glyph *, glyph *, int);	// Add to the kerning table a
+			// kerning amount (arg3) between two given glyphs
+			// (arg1 and arg2).
+  static int hash_kern(glyph *, glyph *);	// Return a hash code for
+			// the pair of glyphs (arg1 and arg2).
+
+  /* Returns w * pointsize / unitwidth, rounded to the nearest integer.  */
+  int scale(int w, int pointsize);
+  static bool unit_scale(double *, char); // Convert value in arg1 from
+			// the given unit (arg2; possible values are
+			// 'i', 'c', 'p', and 'P' as documented in the
+			// info file of groff, section 'Measurements')
+			// to inches.  Store result in arg1 and return
+			// whether conversion was successful.
+  virtual void handle_unknown_font_command(const char *,	// command
+					   const char *,	// arg
+					   const char *,	// file
+					   int);		// lineno
+
+protected:
+  font(const char *);	// Initialize a font with the given name.
+
+  // Load the font description file with the name in member variable
+  // `name` into this object.  If arg1 is true, only the part of the
+  // font description file before the 'charset' and 'kernpairs' sections
+  // is loaded.  Return success/failure status of load.
+  bool load(bool = false);
+};
+
+// Local Variables:
+// fill-column: 72
+// mode: C++
+// End:
+// vim: set cindent noexpandtab shiftwidth=2 textwidth=72:
diff --git a/src/include/geometry.h b/src/include/geometry.h
new file mode 100644
index 0000000..9f87f1b
--- /dev/null
+++ b/src/include/geometry.h
@@ -0,0 +1,26 @@
+// -*- C++ -*-
+/* Copyright (C) 2001-2020 Free Software Foundation, Inc.
+     Written by Gaius Mulley <gaius@glam.ac.uk>
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+int adjust_arc_center(const int *, double *);
+void check_output_arc_limits(int x, int y,
+			     int xv1, int yv1,
+			     int xv2, int yv2,
+			     double c0, double c1,
+			     int *minx, int *maxx,
+			     int *miny, int *maxy);
diff --git a/src/include/getopt.h b/src/include/getopt.h
new file mode 100644
index 0000000..3d81e6d
--- /dev/null
+++ b/src/include/getopt.h
@@ -0,0 +1,226 @@
+/* Declarations for getopt.
+   Copyright (C) 1989-2020 Free Software Foundation, Inc.
+
+   This file is part of the GNU C Library.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef _GETOPT_H
+
+#ifndef __need_getopt
+# define _GETOPT_H 1
+#endif
+
+/* Standalone applications should #define __GETOPT_PREFIX to an
+   identifier that prefixes the external functions and variables
+   defined in this header.  When this happens, include the
+   headers that might declare getopt so that they will not cause
+   confusion if included after this file.  Then systematically rename
+   identifiers so that they do not collide with the system functions
+   and variables.  Renaming avoids problems with some compilers and
+   linkers.  */
+#if defined __GETOPT_PREFIX && !defined __need_getopt
+# include <stdlib.h>
+# include <stdio.h>
+# if HAVE_UNISTD_H
+#  include <unistd.h>
+# endif
+# undef __need_getopt
+# undef getopt
+# undef getopt_long
+# undef getopt_long_only
+# undef optarg
+# undef opterr
+# undef optind
+# undef optopt
+# define __GETOPT_CONCAT(x, y) x ## y
+# define __GETOPT_XCONCAT(x, y) __GETOPT_CONCAT (x, y)
+# define __GETOPT_ID(y) __GETOPT_XCONCAT (__GETOPT_PREFIX, y)
+# define getopt __GETOPT_ID (getopt)
+# define getopt_long __GETOPT_ID (getopt_long)
+# define getopt_long_only __GETOPT_ID (getopt_long_only)
+# define optarg __GETOPT_ID (optarg)
+# define opterr __GETOPT_ID (opterr)
+# define optind __GETOPT_ID (optind)
+# define optopt __GETOPT_ID (optopt)
+#endif
+
+/* Standalone applications get correct prototypes for getopt_long and
+   getopt_long_only; they declare "char **argv".  libc uses prototypes
+   with "char *const *argv" that are incorrect because getopt_long and
+   getopt_long_only can permute argv; this is required for backward
+   compatibility (e.g., for LSB 2.0.1).
+
+   This used to be '#if defined __GETOPT_PREFIX && !defined __need_getopt',
+   but it caused redefinition warnings if both unistd.h and getopt.h were
+   included, since unistd.h includes getopt.h having previously defined
+   __need_getopt.
+
+   The only place where __getopt_argv_const is used is in definitions
+   of getopt_long and getopt_long_only below, but these are visible
+   only if __need_getopt is not defined, so it is quite safe to rewrite
+   the conditional as follows:
+*/
+#if !defined __need_getopt
+# if defined __GETOPT_PREFIX
+#  define __getopt_argv_const /* empty */
+# else
+#  define __getopt_argv_const const
+# endif
+#endif
+
+/* If __GNU_LIBRARY__ is not already defined, either we are being used
+   standalone, or this is the first header included in the source file.
+   If we are being used with glibc, we need to include <features.h>, but
+   that does not exist if we are standalone.  So: if __GNU_LIBRARY__ is
+   not defined, include <ctype.h>, which will pull in <features.h> for us
+   if it's from glibc.  (Why ctype.h?  It's guaranteed to exist and it
+   doesn't flood the namespace with stuff the way some other headers do.)  */
+#if !defined __GNU_LIBRARY__
+# include <ctype.h>
+#endif
+
+#ifndef __THROW
+# ifndef __GNUC_PREREQ
+#  define __GNUC_PREREQ(maj, min) (0)
+# endif
+# if defined __cplusplus && __GNUC_PREREQ (2,8)
+#  define __THROW	throw ()
+# else
+#  define __THROW
+# endif
+#endif
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/* For communication from 'getopt' to the caller.
+   When 'getopt' finds an option that takes an argument,
+   the argument value is returned here.
+   Also, when 'ordering' is RETURN_IN_ORDER,
+   each non-option ARGV-element is returned here.  */
+
+extern char *optarg;
+
+/* Index in ARGV of the next element to be scanned.
+   This is used for communication to and from the caller
+   and for communication between successive calls to 'getopt'.
+
+   On entry to 'getopt', zero means this is the first call; initialize.
+
+   When 'getopt' returns -1, this is the index of the first of the
+   non-option elements that the caller should itself scan.
+
+   Otherwise, 'optind' communicates from one call to the next
+   how much of ARGV has been scanned so far.  */
+
+extern int optind;
+
+/* Callers store zero here to inhibit the error message 'getopt' prints
+   for unrecognized options.  */
+
+extern int opterr;
+
+/* Set to an option character which was unrecognized.  */
+
+extern int optopt;
+
+#ifndef __need_getopt
+/* Describe the long-named options requested by the application.
+   The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
+   of 'struct option' terminated by an element containing a name which is
+   zero.
+
+   The field 'has_arg' is:
+   no_argument		(or 0) if the option does not take an argument,
+   required_argument	(or 1) if the option requires an argument,
+   optional_argument	(or 2) if the option takes an optional argument.
+
+   If the field 'flag' is not NULL, it points to a variable that is set
+   to the value given in the field 'val' when the option is found, but
+   left unchanged if the option is not found.
+
+   To have a long-named option do something other than set an 'int' to
+   a compiled-in constant, such as set a value from 'optarg', set the
+   option's 'flag' field to zero and its 'val' field to a nonzero
+   value (the equivalent single-letter option character, if there is
+   one).  For long options that have a zero 'flag' field, 'getopt'
+   returns the contents of the 'val' field.  */
+
+struct option
+{
+  const char *name;
+  /* has_arg can't be an enum because some compilers complain about
+     type mismatches in all the code that assumes it is an int.  */
+  int has_arg;
+  int *flag;
+  int val;
+};
+
+/* Names for the values of the 'has_arg' field of 'struct option'.  */
+
+# define no_argument		0
+# define required_argument	1
+# define optional_argument	2
+#endif	/* need getopt */
+
+
+/* Get definitions and prototypes for functions to process the
+   arguments in ARGV (ARGC of them, minus the program name) for
+   options given in OPTS.
+
+   Return the option character from OPTS just read.  Return -1 when
+   there are no more options.  For unrecognized options, or options
+   missing arguments, 'optopt' is set to the option letter, and '?' is
+   returned.
+
+   The OPTS string is a list of characters which are recognized option
+   letters, optionally followed by colons, specifying that that letter
+   takes an argument, to be placed in 'optarg'.
+
+   If a letter in OPTS is followed by two colons, its argument is
+   optional.  This behavior is specific to the GNU 'getopt'.
+
+   The argument '--' causes premature termination of argument
+   scanning, explicitly telling 'getopt' that there are no more
+   options.
+
+   If OPTS begins with '--', then non-option arguments are treated as
+   arguments to the option '\0'.  This behavior is specific to the GNU
+   'getopt'.  */
+
+extern int getopt (int ___argc, char *const *___argv, const char *__shortopts)
+       __THROW;
+
+#ifndef __need_getopt
+extern int getopt_long (int ___argc, char *__getopt_argv_const *___argv,
+			const char *__shortopts,
+		        const struct option *__longopts, int *__longind)
+       __THROW;
+extern int getopt_long_only (int ___argc, char *__getopt_argv_const *___argv,
+			     const char *__shortopts,
+		             const struct option *__longopts, int *__longind)
+       __THROW;
+
+#endif
+
+#ifdef	__cplusplus
+}
+#endif
+
+/* Make sure we later can get all the definitions and declarations.  */
+#undef __need_getopt
+
+#endif /* getopt.h */
diff --git a/src/include/getopt_int.h b/src/include/getopt_int.h
new file mode 100644
index 0000000..fa6be44
--- /dev/null
+++ b/src/include/getopt_int.h
@@ -0,0 +1,130 @@
+/* Internal declarations for getopt.
+   Copyright (C) 1989-2020 Free Software Foundation, Inc.
+
+   This file is part of the GNU C Library.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef _GETOPT_INT_H
+#define _GETOPT_INT_H	1
+
+extern int _getopt_internal (int ___argc, char **___argv,
+			     const char *__shortopts,
+		             const struct option *__longopts, int *__longind,
+			     int __long_only, int __posixly_correct);
+
+
+/* Reentrant versions which can handle parsing multiple argument
+   vectors at the same time.  */
+
+/* Data type for reentrant functions.  */
+struct _getopt_data
+{
+  /* These have exactly the same meaning as the corresponding global
+     variables, except that they are used for the reentrant
+     versions of getopt.  */
+  int optind;
+  int opterr;
+  int optopt;
+  char *optarg;
+
+  /* Internal members.  */
+
+  /* True if the internal members have been initialized.  */
+  int __initialized;
+
+  /* The next char to be scanned in the option-element
+     in which the last option character we returned was found.
+     This allows us to pick up the scan where we left off.
+
+     If this is zero, or a null string, it means resume the scan
+     by advancing to the next ARGV-element.  */
+  char *__nextchar;
+
+  /* Describe how to deal with options that follow non-option ARGV-elements.
+
+     If the caller did not specify anything,
+     the default is REQUIRE_ORDER if the environment variable
+     POSIXLY_CORRECT is defined, PERMUTE otherwise.
+
+     REQUIRE_ORDER means don't recognize them as options;
+     stop option processing when the first non-option is seen.
+     This is what Unix does.
+     This mode of operation is selected by either setting the environment
+     variable POSIXLY_CORRECT, or using '+' as the first character
+     of the list of option characters, or by calling getopt.
+
+     PERMUTE is the default.  We permute the contents of ARGV as we
+     scan, so that eventually all the non-options are at the end.
+     This allows options to be given in any order, even with programs
+     that were not written to expect this.
+
+     RETURN_IN_ORDER is an option available to programs that were
+     written to expect options and other ARGV-elements in any order
+     and that care about the ordering of the two.  We describe each
+     non-option ARGV-element as if it were the argument of an option
+     with character code 1.  Using '-' as the first character of the
+     list of option characters selects this mode of operation.
+
+     The special argument '--' forces an end of option-scanning regardless
+     of the value of 'ordering'.  In the case of RETURN_IN_ORDER, only
+     '--' can cause 'getopt' to return -1 with 'optind' != ARGC.  */
+
+  enum
+    {
+      REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
+    } __ordering;
+
+  /* If the POSIXLY_CORRECT environment variable is set
+     or getopt was called.  */
+  int __posixly_correct;
+
+
+  /* Handle permutation of arguments.  */
+
+  /* Describe the part of ARGV that contains non-options that have
+     been skipped.  'first_nonopt' is the index in ARGV of the first
+     of them; 'last_nonopt' is the index after the last of them.  */
+
+  int __first_nonopt;
+  int __last_nonopt;
+
+#if defined _LIBC && defined USE_NONOPTION_FLAGS
+  int __nonoption_flags_max_len;
+  int __nonoption_flags_len;
+# endif
+};
+
+/* The initializer is necessary to set OPTIND and OPTERR to their
+   default values and to clear the initialization flag.  */
+#define _GETOPT_DATA_INITIALIZER	{ 1, 1 }
+
+extern int _getopt_internal_r (int ___argc, char **___argv,
+			       const char *__shortopts,
+			       const struct option *__longopts, int *__longind,
+			       int __long_only, int __posixly_correct,
+			       struct _getopt_data *__data);
+
+extern int _getopt_long_r (int ___argc, char **___argv,
+			   const char *__shortopts,
+			   const struct option *__longopts, int *__longind,
+			   struct _getopt_data *__data);
+
+extern int _getopt_long_only_r (int ___argc, char **___argv,
+				const char *__shortopts,
+				const struct option *__longopts,
+				int *__longind,
+				struct _getopt_data *__data);
+
+#endif /* getopt_int.h */
diff --git a/src/include/gettext.h b/src/include/gettext.h
new file mode 100644
index 0000000..8a22212
--- /dev/null
+++ b/src/include/gettext.h
@@ -0,0 +1,22 @@
+/* -*- C -*- */
+/* Copyright (C) 2014-2020 Free Software Foundation, Inc.
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+/* This is a dummy header file to make getopt compile without gettext
+   support. */
+
+#define gettext(s) s
diff --git a/src/include/html-strings.h b/src/include/html-strings.h
new file mode 100644
index 0000000..eaf551b
--- /dev/null
+++ b/src/include/html-strings.h
@@ -0,0 +1,26 @@
+// -*- C++ -*-
+/* Copyright (C) 2001-2020 Free Software Foundation, Inc.
+     Written by Gaius Mulley (gaius@glam.ac.uk).
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+/*
+ *  defines the image tags issued by the pre-processors (tbl, pic, eqn)
+ *  and later detected by pre-html.cpp
+ */
+
+#define HTML_IMAGE_INLINE_BEGIN	"\\O[HTML-IMAGE-INLINE-BEGIN]"
+#define HTML_IMAGE_INLINE_END	"\\O[HTML-IMAGE-INLINE-END]"
diff --git a/src/include/htmlhint.h b/src/include/htmlhint.h
new file mode 100644
index 0000000..c12a8b9
--- /dev/null
+++ b/src/include/htmlhint.h
@@ -0,0 +1,36 @@
+// -*- C++ -*-
+/* Copyright (C) 2000-2020 Free Software Foundation, Inc.
+     Written by Gaius Mulley <gaius@glam.ac.uk>
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef HTMLINDICATE_H
+#define HTMLINDICATE_H
+
+/*
+ *  html_begin_suppress - suppresses output for the html device
+ *                        and resets the min/max registers for -Tps.
+ *                        Only called for inline images (such as eqn).
+ *
+ */
+extern void html_begin_suppress();
+
+/*
+ *  html_end_suppress - end the suppression of output.
+ */
+extern void html_end_suppress();
+
+#endif
diff --git a/src/include/include.am b/src/include/include.am
new file mode 100644
index 0000000..ca32d6d
--- /dev/null
+++ b/src/include/include.am
@@ -0,0 +1,47 @@
+# Automake rules for 'include'
+#
+# Copyright (C) 2014-2020 Free Software Foundation, Inc.
+#
+# 'groff' is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+#
+# 'groff' is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+#
+########################################################################
+
+nodist_noinst_HEADERS = defs.h
+CLEANFILES += defs.h
+defs.h: config.status
+	@$(SHELL) $(top_srcdir)/gendef.sh defs.h \
+	"PROG_PREFIX=\"$(g)\"" \
+	"DEVICE=\"$(DEVICE)\"" \
+	"INSTALLPATH=\"$(prefix)\"" \
+	"BINPATH=\"$(bindir)\"" \
+	"FONTPATH=\"$(fontpath)\"" \
+	"MACROPATH=\"$(tmacpath)\"" \
+	"INDEX_SUFFIX=\"$(indexext)\"" \
+	"COMMON_WORDS_FILE=\"$(common_words_file)\"" \
+	"DEFAULT_INDEX_DIR=\"$(indexdir)\"" \
+	"DEFAULT_INDEX_NAME=\"$(indexname)\"" \
+	"DEFAULT_INDEX=\"$(indexdir)/$(indexname)\""
+
+dist-hook: dist_include
+dist_include:
+	chmod u+w $(distdir)/src/include
+	cp -f $(top_srcdir)/src/include/*.h $(distdir)/src/include
+
+
+# Local Variables:
+# mode: makefile-automake
+# fill-column: 72
+# End:
+# vim: set autoindent filetype=automake textwidth=72:
diff --git a/src/include/index.h b/src/include/index.h
new file mode 100644
index 0000000..a7d3201
--- /dev/null
+++ b/src/include/index.h
@@ -0,0 +1,41 @@
+// -*- C++ -*-
+/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#define INDEX_MAGIC 0x23021964
+#define INDEX_VERSION 1
+
+struct index_header {
+  int magic;
+  int version;
+  int tags_size;
+  int table_size;
+  int lists_size;
+  int strings_size;
+  int truncate;
+  int shortest;
+  int common;
+};
+
+struct tag {
+  int filename_index;
+  int start;
+  int length;
+};
+
+unsigned hash(const char *s, int len);
diff --git a/src/include/itable.h b/src/include/itable.h
new file mode 100644
index 0000000..c97db55
--- /dev/null
+++ b/src/include/itable.h
@@ -0,0 +1,193 @@
+/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#include <assert.h>
+
+// 'class ITABLE(T)' is the type of a hash table mapping an integer (int >= 0)
+// to an object of type T.
+//
+// 'struct IASSOC(T)' is the type of a association (pair) between an integer
+// (int >= 0) and an object of type T.
+//
+// 'class ITABLE_ITERATOR(T)' is the type of an iterator iterating through a
+// 'class ITABLE(T)'.
+//
+// Nowadays one would use templates for this; this code predates the addition
+// of templates to C++.
+#define ITABLE(T) T ## _itable
+#define IASSOC(T) T ## _iassoc
+#define ITABLE_ITERATOR(T) T ## _itable_iterator
+
+// ptable.h declares this too
+#ifndef NEXT_PTABLE_SIZE_DEFINED
+# define NEXT_PTABLE_SIZE_DEFINED
+extern unsigned next_ptable_size(unsigned);	// Return the first suitable
+				// hash table size greater than the given
+				// value.
+#endif
+
+// Declare the types 'class ITABLE(T)', 'struct IASSOC(T)', and 'class
+// ITABLE_ITERATOR(T)' for the type 'T'.
+#define declare_itable(T)						      \
+									      \
+struct IASSOC(T) {							      \
+  int key;								      \
+  T *val;								      \
+  IASSOC(T)();								      \
+};									      \
+									      \
+class ITABLE(T);							      \
+									      \
+class ITABLE_ITERATOR(T) {						      \
+  ITABLE(T) *p;								      \
+  unsigned i;								      \
+public:									      \
+  ITABLE_ITERATOR(T)(ITABLE(T) *);	/* Initialize an iterator running     \
+					   through the given table.  */	      \
+  int next(int *, T **);		/* Fetch the next pair, store the key \
+					   and value in arg1 and arg2,	      \
+					   respectively, and return 1.  If    \
+					   there is no more pair in the	      \
+					   table, return 0.  */		      \
+};									      \
+									      \
+class ITABLE(T) {							      \
+  IASSOC(T) *v;								      \
+  unsigned size;							      \
+  unsigned used;							      \
+  enum {								      \
+    FULL_NUM = 2,							      \
+    FULL_DEN = 3,							      \
+    INITIAL_SIZE = 17							      \
+  };									      \
+public:									      \
+  ITABLE(T)();				/* Create an empty table.  */	      \
+  ~ITABLE(T)();				/* Delete a table, including its      \
+					   values.  */			      \
+  void define(int, T *);		/* Define the value (arg2) for a key  \
+					   (arg1).  */			      \
+  T *lookup(int);			/* Return a pointer to the value of   \
+					   the given key, if found in the     \
+					   table, or NULL otherwise.  */      \
+  friend class ITABLE_ITERATOR(T);					      \
+};
+
+
+// Values must be allocated by the caller (always using new[], not new)
+// and are freed by ITABLE.
+
+// Define the implementations of the members of the types 'class ITABLE(T)',
+// 'struct IASSOC(T)', 'class ITABLE_ITERATOR(T)' for the type 'T'.
+#define implement_itable(T)						      \
+									      \
+IASSOC(T)::IASSOC(T)()							      \
+: key(-1), val(0)							      \
+{									      \
+}									      \
+									      \
+ITABLE(T)::ITABLE(T)()							      \
+{									      \
+  v = new IASSOC(T)[size = INITIAL_SIZE];				      \
+  used = 0;								      \
+}									      \
+									      \
+ITABLE(T)::~ITABLE(T)()							      \
+{									      \
+  for (unsigned i = 0; i < size; i++)					      \
+    delete[] v[i].val;							      \
+  delete[] v;								      \
+}									      \
+									      \
+void ITABLE(T)::define(int key, T *val)					      \
+{									      \
+  assert(key >= 0);							      \
+  unsigned int h = (unsigned int)(key);					      \
+  unsigned n;								      \
+  for (n = unsigned(h % size);						      \
+       v[n].key >= 0;							      \
+       n = (n == 0 ? size - 1 : n - 1))					      \
+    if (v[n].key == key) {						      \
+      delete[] v[n].val;						      \
+      v[n].val = val;							      \
+      return;								      \
+    }									      \
+  if (val == 0)								      \
+    return;								      \
+  if (used*FULL_DEN >= size*FULL_NUM) {					      \
+    IASSOC(T) *oldv = v;						      \
+    unsigned old_size = size;						      \
+    size = next_ptable_size(size);					      \
+    v = new IASSOC(T)[size];						      \
+    for (unsigned i = 0; i < old_size; i++)				      \
+      if (oldv[i].key >= 0) {						      \
+	if (oldv[i].val != 0) {						      \
+	  unsigned j;							      \
+	  for (j = (unsigned int)(oldv[i].key) % size;			      \
+	       v[j].key >= 0;						      \
+	       j = (j == 0 ? size - 1 : j - 1))				      \
+		 ;							      \
+	  v[j].key = oldv[i].key;					      \
+	  v[j].val = oldv[i].val;					      \
+	}								      \
+      }									      \
+    for (n = unsigned(h % size);					      \
+	 v[n].key >= 0;							      \
+	 n = (n == 0 ? size - 1 : n - 1))				      \
+      ;									      \
+    delete[] oldv;							      \
+  }									      \
+  v[n].key = key;							      \
+  v[n].val = val;							      \
+  used++;								      \
+}									      \
+									      \
+T *ITABLE(T)::lookup(int key)						      \
+{									      \
+  assert(key >= 0);							      \
+  for (unsigned n = (unsigned int)key % size;				      \
+       v[n].key >= 0;							      \
+       n = (n == 0 ? size - 1 : n - 1))					      \
+    if (v[n].key == key)						      \
+      return v[n].val;							      \
+  return 0;								      \
+}									      \
+									      \
+ITABLE_ITERATOR(T)::ITABLE_ITERATOR(T)(ITABLE(T) *t)			      \
+: p(t), i(0)								      \
+{									      \
+}									      \
+									      \
+int ITABLE_ITERATOR(T)::next(int *keyp, T **valp)			      \
+{									      \
+  unsigned size = p->size;						      \
+  IASSOC(T) *v = p->v;							      \
+  for (; i < size; i++)							      \
+    if (v[i].key >= 0) {						      \
+      *keyp = v[i].key;							      \
+      *valp = v[i].val;							      \
+      i++;								      \
+      return 1;								      \
+    }									      \
+  return 0;								      \
+}
+
+// Local Variables:
+// fill-column: 72
+// mode: C++
+// End:
+// vim: set cindent noexpandtab shiftwidth=2 textwidth=72:
diff --git a/src/include/lf.h b/src/include/lf.h
new file mode 100644
index 0000000..dc85a84
--- /dev/null
+++ b/src/include/lf.h
@@ -0,0 +1,21 @@
+// -*- C++ -*-
+/* Copyright (C) 2014-2020 Free Software Foundation, Inc.
+     Written by Werner Lemberg (wl@gnu.org)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+int interpret_lf_args(const char *p);
+void normalize_for_lf (string &fn);
diff --git a/src/include/lib.h b/src/include/lib.h
new file mode 100644
index 0000000..6b1d854
--- /dev/null
+++ b/src/include/lib.h
@@ -0,0 +1,161 @@
+/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef GROFF_LIB_H
+#define GROFF_LIB_H
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#if defined(__INTERIX) && !defined(_ALL_SOURCE)
+#define _ALL_SOURCE
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+#ifndef HAVE_STRERROR
+  char *strerror(int);
+#endif
+  const char *i_to_a(int);
+  const char *ui_to_a(unsigned int);
+  const char *if_to_a(int, int);
+#ifdef __cplusplus
+}
+#endif
+
+#define __GETOPT_PREFIX groff_
+#include <getopt.h>
+
+#ifdef HAVE_SETLOCALE
+#include <locale.h>
+#define getlocale(category) setlocale(category, NULL)
+#else /* !HAVE_SETLOCALE */
+#define LC_ALL 0
+#define LC_CTYPE 0
+#define setlocale(category, locale) (void)(category, locale)
+#define getlocale(category) ((void)(category), (char *)"C")
+#endif /* !HAVE_SETLOCALE */
+
+#include <stdbool.h>
+
+char *strsave(const char *s);
+bool is_prime(unsigned);
+double groff_hypot(double, double);
+
+#include <stdio.h>
+#include <string.h>
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
+
+#include <stdarg.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* LynxOS 4.0.0 doesn't declare vfprintf() */
+#ifdef NEED_DECLARATION_VFPRINTF
+  int vfprintf(FILE *, const char *, va_list);
+#endif
+
+#ifndef HAVE_MKSTEMP
+/* since mkstemp() is defined as a real C++ function if taken from
+   groff's mkstemp.cpp we need a declaration */
+int mkstemp(char *tmpl);
+#endif /* HAVE_MKSTEMP */
+
+int mksdir(char *tmpl);
+
+#ifdef __cplusplus
+  FILE *xtmpfile(char **namep = 0,
+		 const char *postfix_long = 0,
+		 const char *postfix_short = 0,
+		 int do_unlink = 1);
+  char *xtmptemplate(const char *postfix_long,
+		     const char *postfix_short);
+#endif
+
+#ifdef NEED_DECLARATION_POPEN
+  FILE *popen(const char *, const char *);
+#endif /* NEED_DECLARATION_POPEN */
+
+#ifdef NEED_DECLARATION_PCLOSE
+  int pclose (FILE *);
+#endif /* NEED_DECLARATION_PCLOSE */
+
+  size_t file_name_max(const char *fname);
+  size_t path_name_max(void);
+
+  extern char invalid_char_table[];
+
+  inline bool is_invalid_input_char(int c)
+  {
+    return (c >= 0 && invalid_char_table[c]);
+  }
+
+#ifdef HAVE_STRCASECMP
+#ifdef NEED_DECLARATION_STRCASECMP
+// Ultrix4.3's string.h fails to declare this.
+  int strcasecmp(const char *, const char *); }
+#endif /* NEED_DECLARATION_STRCASECMP */
+#else /* !HAVE_STRCASECMP */
+  int strcasecmp(const char *, const char *);
+#endif /* HAVE_STRCASECMP */
+
+#if !defined(_AIX) && !defined(sinix) && !defined(__sinix__)
+#ifdef HAVE_STRNCASECMP
+#ifdef NEED_DECLARATION_STRNCASECMP
+// SunOS's string.h fails to declare this.
+  int strncasecmp(const char *, const char *, int);
+#endif /* NEED_DECLARATION_STRNCASECMP */
+#else /* !HAVE_STRNCASECMP */
+  int strncasecmp(const char *, const char *, size_t);
+#endif /* HAVE_STRNCASECMP */
+#endif /* !_AIX && !sinix && !__sinix__ */
+
+#ifdef __cplusplus
+}
+#endif
+
+#ifdef HAVE_CC_LIMITS_H
+#include <limits.h>
+#else /* !HAVE_CC_LIMITS_H */
+#define INT_MAX 2147483647
+#endif /* !HAVE_CC_LIMITS_H */
+
+/* Maximum number of digits in decimal representations of `int` types
+   not including a leading minus sign. */
+#define INT_DIGITS 19		/* enough for 64 bit integer */
+#define UINT_DIGITS 20
+
+#ifdef PI
+#undef PI
+#endif
+
+static const double PI = 3.14159265358979323846;
+
+#endif /* GROFF_LIB_H */
+
+// Local Variables:
+// fill-column: 72
+// mode: C++
+// End:
+// vim: set cindent noexpandtab shiftwidth=2 textwidth=72:
diff --git a/src/include/localcharset.h b/src/include/localcharset.h
new file mode 100644
index 0000000..bbf694e
--- /dev/null
+++ b/src/include/localcharset.h
@@ -0,0 +1,40 @@
+/* Determine a canonical name for the current locale's character encoding.
+   Copyright (C) 2000-2020 Free Software Foundation, Inc.
+   This file is part of the GNU CHARSET Library.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License along
+   with this program; if not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef _LOCALCHARSET_H
+#define _LOCALCHARSET_H
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Determine the current locale's character encoding, and canonicalize it
+   into one of the canonical names listed in config.charset.
+   The result must not be freed; it is statically allocated.
+   If the canonical name cannot be determined, the result is a non-canonical
+   name.  */
+extern const char * locale_charset (void);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* _LOCALCHARSET_H */
diff --git a/src/include/macropath.h b/src/include/macropath.h
new file mode 100644
index 0000000..26c1baf
--- /dev/null
+++ b/src/include/macropath.h
@@ -0,0 +1,22 @@
+// -*- C++ -*-
+/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+extern search_path macro_path;
+extern search_path safer_macro_path;
+extern search_path config_macro_path;
diff --git a/src/include/nonposix.h b/src/include/nonposix.h
new file mode 100644
index 0000000..6a61009
--- /dev/null
+++ b/src/include/nonposix.h
@@ -0,0 +1,230 @@
+/* -*- C -*- */
+/* Copyright (C) 2000-2020 Free Software Foundation, Inc.
+     Written by Eli Zaretskii (eliz@is.elta.co.il)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+/* This header file compartmentalize all idiosyncrasies of non-Posix
+   systems, such as MS-DOS, MS-Windows, etc.  It should be loaded after
+   the system headers like stdio.h to protect against warnings and error
+   messages w.r.t. redefining macros. */
+
+#if defined _MSC_VER
+# ifndef _WIN32
+#  define _WIN32
+# endif
+#endif
+
+#if defined(__MSDOS__) || defined(__EMX__) \
+    || (defined(_WIN32) && !defined(_UWIN) && !defined(__CYGWIN__))
+
+/* Binary I/O nuisances. */
+# include <fcntl.h>
+# include <io.h>
+# ifdef HAVE_UNISTD_H
+#  include <unistd.h>
+# endif
+# ifndef STDIN_FILENO
+#  define STDIN_FILENO	0
+#  define STDOUT_FILENO	1
+#  define STDERR_FILENO	2
+# endif
+# ifdef HAVE_DIRECT_H
+#  include <direct.h>
+# endif
+# ifdef HAVE_PROCESS_H
+#  include <process.h>
+# endif
+# if defined(_MSC_VER) || defined(__MINGW32__)
+#  define POPEN_RT	"rt"
+#  define POPEN_WT	"wt"
+#  define popen(c,m)	_popen(c,m)
+#  define pclose(p)	_pclose(p)
+#  define pipe(pfd)	_pipe((pfd),0,_O_BINARY|_O_NOINHERIT)
+#  define mkdir(p,m)	_mkdir(p)
+#  define setmode(f,m)	_setmode(f,m)
+#  define WAIT(s,p,m)	_cwait(s,p,m)
+#  define creat(p,m)	_creat(p,m)
+#  define read(f,b,s)	_read(f,b,s)
+#  define write(f,b,s)	_write(f,b,s)
+#  define dup(f)	_dup(f)
+#  define dup2(f1,f2)	_dup2(f1,f2)
+#  define close(f)	_close(f)
+#  define isatty(f)	_isatty(f)
+#  define access(p,m)	_access(p,m)
+# endif
+# define SET_BINARY(f)	do {if (!isatty(f)) setmode(f,O_BINARY);} while(0)
+# define FOPEN_RB	"rb"
+# define FOPEN_WB	"wb"
+# define FOPEN_RWB	"wb+"
+# ifndef O_BINARY
+#  ifdef _O_BINARY
+#   define O_BINARY	(_O_BINARY)
+#  endif
+# endif
+
+/* The system shell.  Groff assumes a Unixy shell, but non-Posix
+   systems don't have standard places where it lives, and might not
+   have it installed to begin with.  We want to give them some leeway.  */
+# ifdef __EMX__
+#  define getcwd(b,s)	_getcwd2(b,s)
+# else
+#  define BSHELL	(system_shell_name())
+#  define BSHELL_DASH_C	(system_shell_dash_c())
+#  define IS_BSHELL(s)	(is_system_shell(s))
+# endif
+
+/* The separator for directories in PATH and other environment
+   variables.  */
+# define PATH_SEP	";"
+# define PATH_SEP_CHAR	';'
+
+/* Characters that separate directories in a path name.  */
+# define DIR_SEPS	"/\\:"
+
+/* How to tell if the argument is an absolute file name.  */
+# define IS_ABSOLUTE(f) \
+ ((f)[0] == '/' || (f)[0] == '\\' || (f)[0] && (f)[1] == ':')
+
+/* The executable extension.  */
+# define EXE_EXT	".exe"
+
+/* Possible executable extensions.  */
+# define PATH_EXT	".com;.exe;.bat;.cmd"
+
+/* The system null device.  */
+# define NULL_DEV	"NUL"
+
+/* The default place to create temporary files.  */
+# ifndef P_tmpdir
+#  ifdef _P_tmpdir
+#   define P_tmpdir	_P_tmpdir
+#  else
+#   define P_tmpdir	"c:/temp"
+#  endif
+# endif
+
+/* Prototypes.  */
+# ifdef __cplusplus
+  extern "C" {
+# endif
+    char       * system_shell_name(void);
+    const char * system_shell_dash_c(void);
+    int		 is_system_shell(const char *);
+# ifdef __cplusplus
+  }
+# endif
+
+#endif
+
+#if defined(_WIN32) && !defined(_UWIN) && !defined(__CYGWIN__)
+/* Win32 implementations which use the Microsoft runtime library
+ * are prone to hanging when a pipe reader quits with unread data in the pipe.
+ * 'gtroff' avoids this, by invoking 'FLUSH_INPUT_PIPE()', defined as ... */
+# define FLUSH_INPUT_PIPE(fd)		      \
+ do if (!isatty(fd))			      \
+ {					      \
+   char drain[BUFSIZ];			      \
+   while (read(fd, drain, sizeof(drain)) > 0) \
+     ;					      \
+ } while (0)
+
+/* The Microsoft runtime library also has a broken argument passing mechanism,
+ * which may result in improper grouping of arguments passed to a child process
+ * by the 'spawn()' family of functions.  In 'groff', only the 'spawnvp()'
+ * function is affected; we work around this defect, by substituting a
+ * wrapper function in place of 'spawnvp()' calls. */
+
+# ifdef __cplusplus
+  extern "C" {
+# endif
+  int spawnvp_wrapper(int, char *, char **);
+# ifdef __cplusplus
+  }
+# endif
+# ifndef SPAWN_FUNCTION_WRAPPERS
+#  undef  spawnvp
+#  define spawnvp      spawnvp_wrapper
+#  undef  _spawnvp
+#  define _spawnvp     spawnvp
+# endif /* SPAWN_FUNCTION_WRAPPERS */
+
+#else
+/* Other implementations do not suffer from Microsoft runtime bugs,
+ * but 'gtroff' requires a dummy definition for FLUSH_INPUT_PIPE() */
+# define FLUSH_INPUT_PIPE(fd)	do {} while(0)
+#endif
+
+/* Defaults, for Posix systems.  */
+
+#ifndef SET_BINARY
+# define SET_BINARY(f)	do {} while(0)
+#endif
+#ifndef FOPEN_RB
+# define FOPEN_RB	"r"
+#endif
+#ifndef FOPEN_WB
+# define FOPEN_WB	"w"
+#endif
+#ifndef FOPEN_RWB
+# define FOPEN_RWB	"w+"
+#endif
+#ifndef POPEN_RT
+# define POPEN_RT	"r"
+#endif
+#ifndef POPEN_WT
+# define POPEN_WT	"w"
+#endif
+#ifndef O_BINARY
+# define O_BINARY	0
+#endif
+#ifndef BSHELL
+# define BSHELL		"/bin/sh"
+#endif
+#ifndef BSHELL_DASH_C
+# define BSHELL_DASH_C	"-c"
+#endif
+#ifndef IS_BSHELL
+# define IS_BSHELL(s)	((s) && strcmp(s,BSHELL) == 0)
+#endif
+#ifndef PATH_SEP
+# define PATH_SEP	":"
+# define PATH_SEP_CHAR	':'
+#endif
+#ifndef DIR_SEPS
+# define DIR_SEPS	"/"
+#endif
+#ifndef IS_ABSOLUTE
+# define IS_ABSOLUTE(f)	((f)[0] == '/')
+#endif
+#ifndef EXE_EXT
+# define EXE_EXT	""
+#endif
+#ifndef PATH_EXT
+# define PATH_EXT	""
+#endif
+#ifndef NULL_DEV
+# define NULL_DEV	"/dev/null"
+#endif
+#ifndef GS_NAME
+# define GS_NAME	"gs"
+#endif
+#ifndef WAIT
+# define WAIT(s,p,m)	wait(s)
+#endif
+#ifndef _WAIT_CHILD
+# define _WAIT_CHILD	0
+#endif
diff --git a/src/include/paper.h b/src/include/paper.h
new file mode 100644
index 0000000..ed789c4
--- /dev/null
+++ b/src/include/paper.h
@@ -0,0 +1,36 @@
+// -*- C++ -*-
+/* Copyright (C) 2002-2020 Free Software Foundation, Inc.
+     Written by Werner Lemberg (wl@gnu.org)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+struct paper {
+  char *name;
+  double length;		// in PS points
+  double width;			// in PS points
+};
+
+// global constructor
+static class papersize_init {
+  static int initialised;
+public:
+  papersize_init();
+} _papersize_init;
+
+// A0-A7, B0-B7, C0-C7, D0-D7, 8 American paper sizes, 1 special size */
+#define NUM_PAPERSIZES 4*8 + 8 + 1
+
+extern paper papersizes[];
diff --git a/src/include/posix.h b/src/include/posix.h
new file mode 100644
index 0000000..81c2d22
--- /dev/null
+++ b/src/include/posix.h
@@ -0,0 +1,66 @@
+// -*- C++ -*-
+/* Copyright (C) 1992-2020 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#ifdef HAVE_CC_OSFCN_H
+#include <osfcn.h>
+#else
+#include <fcntl.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#endif
+
+#ifndef S_IRUSR
+#define S_IRUSR 0400
+#endif
+
+#ifndef S_IRGRP
+#define S_IRGRP 0040
+#endif
+
+#ifndef S_IROTH
+#define S_IROTH 0004
+#endif
+
+#ifndef S_IWUSR
+#define S_IWUSR 0200
+#endif
+
+#ifndef S_IXUSR
+#define S_IXUSR 0100
+#endif
+
+#ifndef S_ISREG
+#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
+#endif
+
+#ifndef O_RDONLY
+#define O_RDONLY 0
+#endif
+
+#ifndef F_OK
+#define F_OK 0
+#endif
+
+#ifndef HAVE_ISATTY
+#define isatty(n) (1)
+#endif
diff --git a/src/include/printer.h b/src/include/printer.h
new file mode 100644
index 0000000..7b6a7ba
--- /dev/null
+++ b/src/include/printer.h
@@ -0,0 +1,97 @@
+// -*- C++ -*-
+
+// <groff_src_dir>/src/include/printer.h
+
+/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+
+   Written by James Clark (jjc@jclark.com)
+
+   This file is part of groff.
+
+   groff is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   groff is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/* Description
+
+   The class 'printer' performs the postprocessing.  Each
+   postprocessor only needs to implement a derived class of 'printer' and
+   a suitable function 'make_printer' for the device-dependent tasks.
+   Then the methods of class 'printer' are called automatically by
+   'do_file()' in 'input.cpp'.
+*/
+
+#include "color.h"
+
+struct environment {
+  int fontno;
+  int size;
+  int hpos;
+  int vpos;
+  int height;
+  int slant;
+  color *col;
+  color *fill;
+};
+
+class font;
+
+struct font_pointer_list {
+  font *p;
+  font_pointer_list *next;
+
+  font_pointer_list(font *, font_pointer_list *);
+};
+
+class printer {
+public:
+  printer();
+  virtual ~printer();
+  void load_font(int, const char *);
+  void set_ascii_char(unsigned char, const environment *, int * = 0);
+  void set_special_char(const char *, const environment *, int * = 0);
+  virtual void set_numbered_char(int, const environment *, int * = 0);
+  glyph *set_char_and_width(const char *, const environment *,
+			    int *, font **);
+  font *get_font_from_index(int);
+  virtual void draw(int, int *, int, const environment *);
+  // perform change of line color (text, outline) in the print-out 
+  virtual void change_color(const environment * const);
+  // perform change of fill color in the print-out 
+  virtual void change_fill_color(const environment * const);
+  virtual void begin_page(int) = 0;
+  virtual void end_page(int) = 0;
+  virtual font *make_font(const char *);
+  virtual void end_of_line();
+  virtual void special(char *, const environment *, char = 'p');
+  virtual void devtag(char *, const environment *, char = 'p');
+
+protected:
+  font_pointer_list *font_list;
+  font **font_table;
+  int nfonts;
+
+  // information about named characters
+  int is_char_named;
+  int is_named_set;
+  char named_command;
+  const char *named_char_s;
+  int named_char_n;
+
+private:
+  font *find_font(const char *);
+  virtual void set_char(glyph *, font *, const environment *, int,
+			const char *) = 0;
+};
+
+printer *make_printer();
diff --git a/src/include/ptable.h b/src/include/ptable.h
new file mode 100644
index 0000000..fa79293
--- /dev/null
+++ b/src/include/ptable.h
@@ -0,0 +1,233 @@
+/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#include <assert.h>
+#include <string.h>
+
+// 'class PTABLE(T)' is the type of a hash table mapping a string
+// (const char *) to an object of type T.
+//
+// 'struct PASSOC(T)' is the type of a association (pair) between a
+// string (const char *) and an object of type T.
+//
+// 'class PTABLE_ITERATOR(T)' is the type of an iterator iterating through a
+// 'class PTABLE(T)'.
+//
+// Nowadays one would use templates for this; this code predates the addition
+// of templates to C++.
+#define PTABLE(T) T ## _ptable
+#define PASSOC(T) T ## _passoc
+#define PTABLE_ITERATOR(T) T ## _ptable_iterator
+
+// itable.h declares this too
+#ifndef NEXT_PTABLE_SIZE_DEFINED
+# define NEXT_PTABLE_SIZE_DEFINED
+extern unsigned next_ptable_size(unsigned);	// Return the first suitable
+				// hash table size greater than the given
+				// value.
+#endif
+
+extern unsigned long hash_string(const char *);	// Return a hash code of the
+				// given string.  The hash function is
+				// platform dependent.  */
+
+// Declare the types 'class PTABLE(T)', 'struct PASSOC(T)', and 'class
+// PTABLE_ITERATOR(T)' for the type 'T'.
+#define declare_ptable(T)						      \
+									      \
+struct PASSOC(T) {							      \
+  char *key;							      	      \
+  T *val;								      \
+  PASSOC(T)();								      \
+};									      \
+									      \
+class PTABLE(T);							      \
+									      \
+class PTABLE_ITERATOR(T) {						      \
+  PTABLE(T) *p;								      \
+  unsigned i;								      \
+public:									      \
+  PTABLE_ITERATOR(T)(PTABLE(T) *);	/* Initialize an iterator running     \
+					   through the given table.  */	      \
+  int next(const char **, T **);	/* Fetch the next pair, store the key \
+					   and value in arg1 and arg2,	      \
+					   respectively, and return 1.  If    \
+					   there is no more pair in the	      \
+					   table, return 0.  */		      \
+};									      \
+									      \
+class PTABLE(T) {							      \
+  PASSOC(T) *v;								      \
+  unsigned size;							      \
+  unsigned used;							      \
+  enum {								      \
+    FULL_NUM = 1,							      \
+    FULL_DEN = 4,							      \
+    INITIAL_SIZE = 17							      \
+  };									      \
+public:									      \
+  PTABLE(T)();				/* Create an empty table.  */	      \
+  ~PTABLE(T)();				/* Delete a table, including its      \
+					   values.  */			      \
+  const char *define(const char *, T *);/* Define the value (arg2) for a key  \
+					   (arg1).  Return the copy in the    \
+					   table of the key (arg1), or	      \
+					   possibly NULL if the value (arg2)  \
+					   is NULL.  */			      \
+  T *lookup(const char *);		/* Return a pointer to the value of   \
+					   the given key, if found in the     \
+					   table, or NULL otherwise.  */      \
+  T *lookupassoc(const char **);	/* Return a pointer to the value of   \
+					   the given key, passed by reference,\
+					   and replace the key argument with  \
+					   the copy found in the table, if    \
+					   the key is found in the table.     \
+					   Return NULL otherwise.  */	      \
+  friend class PTABLE_ITERATOR(T);					      \
+};
+
+
+// Keys (which are strings) are allocated and freed by PTABLE.
+// Values must be allocated by the caller (always using new[], not new)
+// and are freed by PTABLE.
+
+// Define the implementations of the members of the types 'class PTABLE(T)',
+// 'struct PASSOC(T)', 'class PTABLE_ITERATOR(T)' for the type 'T'.
+#define implement_ptable(T)						      \
+									      \
+PASSOC(T)::PASSOC(T)()							      \
+: key(0), val(0)							      \
+{									      \
+}									      \
+									      \
+PTABLE(T)::PTABLE(T)()							      \
+{									      \
+  v = new PASSOC(T)[size = INITIAL_SIZE];				      \
+  used = 0;								      \
+}									      \
+									      \
+PTABLE(T)::~PTABLE(T)()							      \
+{									      \
+  for (unsigned i = 0; i < size; i++) {					      \
+    free(v[i].key);							      \
+    /* XXX leak, because we don't know whether */			      \
+    /* 'free', 'delete', or 'delete[]' should be used */		      \
+    /* delete[] v[i].val; */						      \
+  }									      \
+  delete[] v;								      \
+}									      \
+									      \
+const char *PTABLE(T)::define(const char *key, T *val)			      \
+{									      \
+  assert(key != 0);							      \
+  unsigned long h = hash_string(key);					      \
+  unsigned n;								      \
+  for (n = unsigned(h % size);					      	      \
+       v[n].key != 0;							      \
+       n = (n == 0 ? size - 1 : n - 1))					      \
+    if (strcmp(v[n].key, key) == 0) {					      \
+      /* XXX leak, because we don't know whether */			      \
+      /* 'free', 'delete', or 'delete[]' should be used */		      \
+      /* delete[] v[n].val; */						      \
+      v[n].val = val;							      \
+      return v[n].key;							      \
+    }									      \
+  if (val == 0)								      \
+    return 0;								      \
+  if (used*FULL_DEN >= size*FULL_NUM) {					      \
+    PASSOC(T) *oldv = v;						      \
+    unsigned old_size = size;						      \
+    size = next_ptable_size(size);					      \
+    v = new PASSOC(T)[size];						      \
+    for (unsigned i = 0; i < old_size; i++)				      \
+      if (oldv[i].key != 0) {						      \
+	if (oldv[i].val == 0)						      \
+	  free(oldv[i].key);						      \
+	else {								      \
+	  unsigned j;							      \
+	  for (j = unsigned(hash_string(oldv[i].key) % size);	      	      \
+	       v[j].key != 0;						      \
+	       j = (j == 0 ? size - 1 : j - 1))				      \
+		 ;							      \
+	  v[j].key = oldv[i].key;					      \
+	  v[j].val = oldv[i].val;					      \
+	}								      \
+      }									      \
+    for (n = unsigned(h % size);					      \
+	 v[n].key != 0;							      \
+	 n = (n == 0 ? size - 1 : n - 1))				      \
+      ;									      \
+    delete[] oldv;							      \
+  }									      \
+  char *temp = (char*)malloc(strlen(key)+1);				      \
+  strcpy(temp, key);							      \
+  v[n].key = temp;							      \
+  v[n].val = val;							      \
+  used++;								      \
+  return temp;								      \
+}									      \
+									      \
+T *PTABLE(T)::lookup(const char *key)					      \
+{									      \
+  assert(key != 0);							      \
+  for (unsigned n = unsigned(hash_string(key) % size);			      \
+       v[n].key != 0;							      \
+       n = (n == 0 ? size - 1 : n - 1))					      \
+    if (strcmp(v[n].key, key) == 0)					      \
+      return v[n].val;							      \
+  return 0;								      \
+}									      \
+									      \
+T *PTABLE(T)::lookupassoc(const char **keyptr)				      \
+{									      \
+  const char *key = *keyptr;						      \
+  assert(key != 0);							      \
+  for (unsigned n = unsigned(hash_string(key) % size);			      \
+       v[n].key != 0;							      \
+       n = (n == 0 ? size - 1 : n - 1))					      \
+    if (strcmp(v[n].key, key) == 0) {					      \
+      *keyptr = v[n].key;						      \
+      return v[n].val;							      \
+    }									      \
+  return 0;								      \
+}									      \
+									      \
+PTABLE_ITERATOR(T)::PTABLE_ITERATOR(T)(PTABLE(T) *t)			      \
+: p(t), i(0)								      \
+{									      \
+}									      \
+									      \
+int PTABLE_ITERATOR(T)::next(const char **keyp, T **valp)		      \
+{									      \
+  unsigned size = p->size;						      \
+  PASSOC(T) *v = p->v;							      \
+  for (; i < size; i++)							      \
+    if (v[i].key != 0) {						      \
+      *keyp = v[i].key;							      \
+      *valp = v[i].val;							      \
+      i++;								      \
+      return 1;								      \
+    }									      \
+  return 0;								      \
+}
+
+// Local Variables:
+// fill-column: 72
+// mode: C++
+// End:
+// vim: set cindent noexpandtab shiftwidth=2 textwidth=72:
diff --git a/src/include/refid.h b/src/include/refid.h
new file mode 100644
index 0000000..9bf3a40
--- /dev/null
+++ b/src/include/refid.h
@@ -0,0 +1,34 @@
+// -*- C++ -*-
+/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+class reference_id {
+  int filename_id;
+  int pos;
+public:
+  reference_id() : filename_id(-1) { }
+  reference_id(int fid, int off) : filename_id(fid), pos(off) { }
+  unsigned hash() const { return (filename_id << 4) + pos; }
+  int is_null() const { return filename_id < 0; }
+  friend inline int operator==(const reference_id &, const reference_id &);
+};
+
+inline int operator==(const reference_id &r1, const reference_id &r2)
+{
+  return r1.filename_id == r2.filename_id && r1.pos == r2.pos;
+}
diff --git a/src/include/relocate.h b/src/include/relocate.h
new file mode 100644
index 0000000..851e2cc
--- /dev/null
+++ b/src/include/relocate.h
@@ -0,0 +1,37 @@
+/* -*- C -*- */
+/* Provide relocation for macro and font files.
+
+   Copyright (C) 2005-2020 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify it
+   under the terms of the GNU Library General Public License as published
+   by the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifdef __cplusplus
+extern char *curr_prefix;
+extern size_t curr_prefix_len;
+
+void set_current_prefix ();
+char *xdirname (char *s);
+char *searchpath (const char *name, const char *pathp);
+#endif
+
+/* This function has C linkage.  */
+extern
+#ifdef __cplusplus
+"C"
+#endif
+char *relocatep (const char *path);
+
+#ifdef __cplusplus
+char *relocate (const char *path);
+#endif
diff --git a/src/include/search.h b/src/include/search.h
new file mode 100644
index 0000000..eb9a039
--- /dev/null
+++ b/src/include/search.h
@@ -0,0 +1,100 @@
+/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+class search_item;
+class search_item_iterator;
+
+class search_list {
+public:
+  search_list();
+  ~search_list();
+  void add_file(const char *fn, int silent = 0);
+  int nfiles() const;
+private:
+  search_item *list;
+  int niterators;
+  int next_fid;
+  friend class search_list_iterator;
+};
+
+class bmpattern;
+
+class linear_searcher {
+  const char *ignore_fields;
+  int truncate_len;
+  bmpattern **keys;
+  int nkeys;
+  const char *search_and_check(const bmpattern *key, const char *buf,
+			       const char *bufend, const char **start = 0)
+    const;
+  int check_match(const char *buf, const char *bufend, const char *match,
+		  int matchlen, const char **cont, const char **start)
+    const;
+public:
+  linear_searcher(const char *query, int query_len,
+		  const char *ign, int trunc);
+  ~linear_searcher();
+  int search(const char *buf, const char *bufend,
+	     const char **startp, int *lengthp) const;
+};
+
+class search_list_iterator {
+  search_list *list;
+  search_item *ptr;
+  search_item_iterator *iter;
+  char *query;
+  linear_searcher searcher;
+public:
+  search_list_iterator(search_list *, const char *query);
+  ~search_list_iterator();
+  int next(const char **, int *, reference_id * = 0);
+};
+
+class search_item {
+protected:
+  char *name;
+  int filename_id;
+public:
+  search_item *next;
+  search_item(const char *nm, int fid);
+  virtual search_item_iterator *make_search_item_iterator(const char *) = 0;
+  virtual ~search_item();
+  int is_named(const char *) const;
+  virtual int next_filename_id() const;
+};
+
+class search_item_iterator {
+  char shut_g_plus_plus_up;
+public:
+  virtual ~search_item_iterator();
+  virtual int next(const linear_searcher &, const char **ptr, int *lenp,
+		   reference_id *) = 0;
+};
+
+search_item *make_index_search_item(const char *filename, int fid);
+search_item *make_linear_search_item(int fd, const char *filename, int fid);
+
+extern int linear_truncate_len;
+extern const char *linear_ignore_fields;
+extern bool do_verify;
+
+// Local Variables:
+// fill-column: 72
+// mode: C++
+// End:
+// vim: set cindent noexpandtab shiftwidth=2 textwidth=72:
diff --git a/src/include/searchpath.h b/src/include/searchpath.h
new file mode 100644
index 0000000..2dda4e8
--- /dev/null
+++ b/src/include/searchpath.h
@@ -0,0 +1,30 @@
+// -*- C++ -*-
+/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+class search_path {
+  char *dirs;
+  unsigned init_len;
+public:
+  search_path(const char *envvar, const char *standard,
+	      int add_home, int add_current);
+  ~search_path();
+  void command_line_dir(const char *);
+  FILE *open_file(const char *, char **);
+  FILE *open_file_cautious(const char *, char ** = 0, const char * = 0);
+};
diff --git a/src/include/stringclass.h b/src/include/stringclass.h
new file mode 100644
index 0000000..ca0bf85
--- /dev/null
+++ b/src/include/stringclass.h
@@ -0,0 +1,194 @@
+/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+
+// Ensure that the first declaration of functions that are later
+// declared as inline declares them as inline.
+
+class string;
+
+inline string operator+(const string &, const string &);
+inline string operator+(const string &, const char *);
+inline string operator+(const char *, const string &);
+inline string operator+(const string &, char);
+inline string operator+(char, const string &);
+inline int operator==(const string &, const string &);
+inline int operator!=(const string &, const string &);
+
+class string {
+public:
+  string();
+  string(const string &);
+  string(const char *);
+  string(const char *, int);
+  string(char);
+
+  ~string();
+  
+  string &operator=(const string &);
+  string &operator=(const char *);
+  string &operator=(char);
+
+  string &operator+=(const string &);
+  string &operator+=(const char *);
+  string &operator+=(char);
+  void append(const char *, int);
+  
+  int length() const;
+  int empty() const;
+  int operator*() const;
+
+  string substring(int i, int n) const;
+
+  char &operator[](int);
+  char operator[](int) const;
+
+  void set_length(int i);
+  const char *contents() const;
+  int search(char) const;
+  char *extract() const;
+  void remove_spaces();
+  void clear();
+  void move(string &);
+
+  friend string operator+(const string &, const string &);
+  friend string operator+(const string &, const char *);
+  friend string operator+(const char *, const string &);
+  friend string operator+(const string &, char);
+  friend string operator+(char, const string &);
+	 
+  friend int operator==(const string &, const string &);
+  friend int operator!=(const string &, const string &);
+  friend int operator<=(const string &, const string &);
+  friend int operator<(const string &, const string &);
+  friend int operator>=(const string &, const string &);
+  friend int operator>(const string &, const string &);
+
+private:
+  char *ptr;
+  int len;
+  int sz;
+
+  string(const char *, int, const char *, int);	// for use by operator+
+  void grow1();
+};
+
+
+inline char &string::operator[](int i)
+{
+  assert(i >= 0 && i < len);
+  return ptr[i];
+}
+
+inline char string::operator[](int i) const
+{
+  assert(i >= 0 && i < len);
+  return ptr[i];
+}
+
+inline int string::length() const
+{
+  return len;
+}
+
+inline int string::empty() const
+{
+  return len == 0;
+}
+
+inline int string::operator*() const
+{
+  return len;
+}
+
+inline const char *string::contents() const
+{
+  return ptr;
+}
+
+inline string operator+(const string &s1, const string &s2)
+{
+  return string(s1.ptr, s1.len, s2.ptr, s2.len);
+}
+
+inline string operator+(const string &s1, const char *s2)
+{
+#ifdef __GNUG__
+  if (s2 == 0)
+    return s1;
+  else
+    return string(s1.ptr, s1.len, s2, strlen(s2));
+#else
+  return s2 == 0 ? s1 : string(s1.ptr, s1.len, s2, strlen(s2));
+#endif
+}
+
+inline string operator+(const char *s1, const string &s2)
+{
+#ifdef __GNUG__
+  if (s1 == 0)
+    return s2;
+  else
+    return string(s1, strlen(s1), s2.ptr, s2.len);
+#else
+  return s1 == 0 ? s2 : string(s1, strlen(s1), s2.ptr, s2.len);
+#endif
+}
+
+inline string operator+(const string &s, char c)
+{
+  return string(s.ptr, s.len, &c, 1);
+}
+
+inline string operator+(char c, const string &s)
+{
+  return string(&c, 1, s.ptr, s.len);
+}
+
+inline int operator==(const string &s1, const string &s2)
+{
+  return (s1.len == s2.len 
+	  && (s1.len == 0 || memcmp(s1.ptr, s2.ptr, s1.len) == 0));
+}
+
+inline int operator!=(const string &s1, const string &s2)
+{
+  return (s1.len != s2.len 
+	  || (s1.len != 0 && memcmp(s1.ptr, s2.ptr, s1.len) != 0));
+}
+
+inline string string::substring(int i, int n) const
+{
+  assert(i >= 0 && i + n <= len);
+  return string(ptr + i, n);
+}
+
+inline string &string::operator+=(char c)
+{
+  if (len >= sz)
+    grow1();
+  ptr[len++] = c;
+  return *this;
+}
+
+void put_string(const string &, FILE *);
+
+string as_string(int);
diff --git a/src/include/symbol.h b/src/include/symbol.h
new file mode 100644
index 0000000..047255d
--- /dev/null
+++ b/src/include/symbol.h
@@ -0,0 +1,88 @@
+/* Copyright (C) 1989-2023 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#include <stdint.h> // uintptr_t
+
+#define DONT_STORE 1
+#define MUST_ALREADY_EXIST 2
+
+class symbol {
+  static const char **table;
+  static int table_used;
+  static int table_size;
+  static char *block;
+  static int block_size;
+  const char *s;
+public:
+  symbol(const char *p, int how = 0);
+  symbol();
+  uintptr_t hash() const;
+  int operator ==(symbol) const;
+  int operator !=(symbol) const;
+  const char *contents() const;
+  int is_null() const;
+  int is_empty() const;
+};
+
+
+extern const symbol NULL_SYMBOL;
+extern const symbol EMPTY_SYMBOL;
+
+inline symbol::symbol() : s(0)
+{
+}
+
+inline int symbol::operator==(symbol p) const
+{
+  return s == p.s;
+}
+
+inline int symbol::operator!=(symbol p) const
+{
+  return s != p.s;
+}
+
+inline uintptr_t symbol::hash() const
+{
+  return reinterpret_cast<uintptr_t>(s);
+}
+
+inline const char *symbol::contents() const
+{
+  return s;
+}
+
+inline int symbol::is_null() const
+{
+  return s == 0;
+}
+
+inline int symbol::is_empty() const
+{
+  return s != 0 && *s == 0;
+}
+
+symbol concat(symbol, symbol);
+
+extern symbol default_symbol;
+
+// Local Variables:
+// fill-column: 72
+// mode: C++
+// End:
+// vim: set cindent noexpandtab shiftwidth=2 textwidth=72:
diff --git a/src/include/unicode.h b/src/include/unicode.h
new file mode 100644
index 0000000..670864b
--- /dev/null
+++ b/src/include/unicode.h
@@ -0,0 +1,63 @@
+// -*- C++ -*-
+/* Copyright (C) 2002-2020 Free Software Foundation, Inc.
+     Written by Werner Lemberg <wl@gnu.org>
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+// Convert a groff glyph name to a string containing an underscore-separated
+// list of Unicode code points.  For example,
+//
+//   '-'   ->  '2010'
+//   ',c'  ->  '00E7'
+//   'fl'  ->  '0066_006C'
+//
+// Return NULL if there is no equivalent.
+const char *glyph_name_to_unicode(const char *);
+
+// Convert a string containing an underscore-separated list of Unicode code
+// points to a groff glyph name.  For example,
+//
+//   '2010'       ->  'hy'
+//   '0066_006C'  ->  'fl'
+//
+// Return NULL if there is no equivalent.
+const char *unicode_to_glyph_name(const char *);
+
+// Convert a string containing a precomposed Unicode character to a string
+// containing an underscore-separated list of Unicode code points,
+// representing its canonical decomposition.  Also perform compatibility
+// equivalent replacement.  For example,
+//
+//   '1F3A' -> '0399_0313_0300'
+//   'FA6A' -> '983B'
+//
+// Return NULL if there is no equivalent.
+const char *decompose_unicode(const char *);
+
+// Test whether the given string denotes a Unicode character.  It must
+// be of the form 'uNNNN', obeying the following rules.
+//
+//   - 'NNNN' must consist of at least 4 hexadecimal digits in upper case.
+//   - If there are more than 4 hexadecimal digits, the leading one must not
+//     be zero,
+//   - 'NNNN' must denote a valid Unicode code point (U+0000..U+10FFFF,
+//     excluding surrogate code points.
+//
+// Return a pointer to 'NNNN' (skipping the leading 'u' character) in case
+// of success, NULL otherwise.
+const char *check_unicode_name(const char *);
+
+// end of unicode.h