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Diffstat (limited to '')
| -rw-r--r-- | gl/lib/argp-fmtstream.h | 310 |
1 files changed, 310 insertions, 0 deletions
diff --git a/gl/lib/argp-fmtstream.h b/gl/lib/argp-fmtstream.h new file mode 100644 index 0000000..0cc8852 --- /dev/null +++ b/gl/lib/argp-fmtstream.h @@ -0,0 +1,310 @@ +/* Word-wrapping and line-truncating streams. + Copyright (C) 1997-2019 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Written by Miles Bader <miles@gnu.ai.mit.edu>. + + 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 <https://www.gnu.org/licenses/>. */ + +/* This package emulates glibc 'line_wrap_stream' semantics for systems that + don't have that. If the system does have it, it is just a wrapper for + that. This header file is only used internally while compiling argp, and + shouldn't be installed. */ + +#ifndef _ARGP_FMTSTREAM_H +#define _ARGP_FMTSTREAM_H + +#include <stdio.h> +#include <string.h> +#include <unistd.h> + +/* The __attribute__ feature is available in gcc versions 2.5 and later. + The __-protected variants of the attributes 'format' and 'printf' are + accepted by gcc versions 2.6.4 (effectively 2.7) and later. + We enable _GL_ATTRIBUTE_FORMAT only if these are supported too, because + gnulib and libintl do '#define printf __printf__' when they override + the 'printf' function. */ +#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7) +# define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec)) +#else +# define _GL_ATTRIBUTE_FORMAT(spec) /* empty */ +#endif + +#if defined (__GNU_LIBRARY__) && defined (HAVE_LINEWRAP_H) +/* line_wrap_stream is available, so use that. */ +#define ARGP_FMTSTREAM_USE_LINEWRAP +#endif + +#ifdef ARGP_FMTSTREAM_USE_LINEWRAP +/* Just be a simple wrapper for line_wrap_stream; the semantics are + *slightly* different, as line_wrap_stream doesn't actually make a new + object, it just modifies the given stream (reversibly) to do + line-wrapping. Since we control who uses this code, it doesn't matter. */ + +#include <linewrap.h> + +typedef FILE *argp_fmtstream_t; + +#define argp_make_fmtstream line_wrap_stream +#define __argp_make_fmtstream line_wrap_stream +#define argp_fmtstream_free line_unwrap_stream +#define __argp_fmtstream_free line_unwrap_stream + +#define __argp_fmtstream_putc(fs,ch) putc(ch,fs) +#define argp_fmtstream_putc(fs,ch) putc(ch,fs) +#define __argp_fmtstream_puts(fs,str) fputs(str,fs) +#define argp_fmtstream_puts(fs,str) fputs(str,fs) +#define __argp_fmtstream_write(fs,str,len) fwrite(str,1,len,fs) +#define argp_fmtstream_write(fs,str,len) fwrite(str,1,len,fs) +#define __argp_fmtstream_printf fprintf +#define argp_fmtstream_printf fprintf + +#define __argp_fmtstream_lmargin line_wrap_lmargin +#define argp_fmtstream_lmargin line_wrap_lmargin +#define __argp_fmtstream_set_lmargin line_wrap_set_lmargin +#define argp_fmtstream_set_lmargin line_wrap_set_lmargin +#define __argp_fmtstream_rmargin line_wrap_rmargin +#define argp_fmtstream_rmargin line_wrap_rmargin +#define __argp_fmtstream_set_rmargin line_wrap_set_rmargin +#define argp_fmtstream_set_rmargin line_wrap_set_rmargin +#define __argp_fmtstream_wmargin line_wrap_wmargin +#define argp_fmtstream_wmargin line_wrap_wmargin +#define __argp_fmtstream_set_wmargin line_wrap_set_wmargin +#define argp_fmtstream_set_wmargin line_wrap_set_wmargin +#define __argp_fmtstream_point line_wrap_point +#define argp_fmtstream_point line_wrap_point + +#else /* !ARGP_FMTSTREAM_USE_LINEWRAP */ +/* Guess we have to define our own version. */ + + +struct argp_fmtstream +{ + FILE *stream; /* The stream we're outputting to. */ + + size_t lmargin, rmargin; /* Left and right margins. */ + ssize_t wmargin; /* Margin to wrap to, or -1 to truncate. */ + + /* Point in buffer to which we've processed for wrapping, but not output. */ + size_t point_offs; + /* Output column at POINT_OFFS, or -1 meaning 0 but don't add lmargin. */ + ssize_t point_col; + + char *buf; /* Output buffer. */ + char *p; /* Current end of text in BUF. */ + char *end; /* Absolute end of BUF. */ +}; + +typedef struct argp_fmtstream *argp_fmtstream_t; + +/* Return an argp_fmtstream that outputs to STREAM, and which prefixes lines + written on it with LMARGIN spaces and limits them to RMARGIN columns + total. If WMARGIN >= 0, words that extend past RMARGIN are wrapped by + replacing the whitespace before them with a newline and WMARGIN spaces. + Otherwise, chars beyond RMARGIN are simply dropped until a newline. + Returns NULL if there was an error. */ +extern argp_fmtstream_t __argp_make_fmtstream (FILE *__stream, + size_t __lmargin, + size_t __rmargin, + ssize_t __wmargin); +extern argp_fmtstream_t argp_make_fmtstream (FILE *__stream, + size_t __lmargin, + size_t __rmargin, + ssize_t __wmargin); + +/* Flush __FS to its stream, and free it (but don't close the stream). */ +extern void __argp_fmtstream_free (argp_fmtstream_t __fs); +extern void argp_fmtstream_free (argp_fmtstream_t __fs); + +extern ssize_t __argp_fmtstream_printf (argp_fmtstream_t __fs, + const char *__fmt, ...) + _GL_ATTRIBUTE_FORMAT ((printf, 2, 3)); +extern ssize_t argp_fmtstream_printf (argp_fmtstream_t __fs, + const char *__fmt, ...) + _GL_ATTRIBUTE_FORMAT ((printf, 2, 3)); + +#if _LIBC +extern int __argp_fmtstream_putc (argp_fmtstream_t __fs, int __ch); +extern int argp_fmtstream_putc (argp_fmtstream_t __fs, int __ch); + +extern int __argp_fmtstream_puts (argp_fmtstream_t __fs, const char *__str); +extern int argp_fmtstream_puts (argp_fmtstream_t __fs, const char *__str); + +extern size_t __argp_fmtstream_write (argp_fmtstream_t __fs, + const char *__str, size_t __len); +extern size_t argp_fmtstream_write (argp_fmtstream_t __fs, + const char *__str, size_t __len); +#endif + +/* Access macros for various bits of state. */ +#define argp_fmtstream_lmargin(__fs) ((__fs)->lmargin) +#define argp_fmtstream_rmargin(__fs) ((__fs)->rmargin) +#define argp_fmtstream_wmargin(__fs) ((__fs)->wmargin) +#define __argp_fmtstream_lmargin argp_fmtstream_lmargin +#define __argp_fmtstream_rmargin argp_fmtstream_rmargin +#define __argp_fmtstream_wmargin argp_fmtstream_wmargin + +#if _LIBC +/* Set __FS's left margin to LMARGIN and return the old value. */ +extern size_t argp_fmtstream_set_lmargin (argp_fmtstream_t __fs, + size_t __lmargin); +extern size_t __argp_fmtstream_set_lmargin (argp_fmtstream_t __fs, + size_t __lmargin); + +/* Set __FS's right margin to __RMARGIN and return the old value. */ +extern size_t argp_fmtstream_set_rmargin (argp_fmtstream_t __fs, + size_t __rmargin); +extern size_t __argp_fmtstream_set_rmargin (argp_fmtstream_t __fs, + size_t __rmargin); + +/* Set __FS's wrap margin to __WMARGIN and return the old value. */ +extern size_t argp_fmtstream_set_wmargin (argp_fmtstream_t __fs, + size_t __wmargin); +extern size_t __argp_fmtstream_set_wmargin (argp_fmtstream_t __fs, + size_t __wmargin); + +/* Return the column number of the current output point in __FS. */ +extern size_t argp_fmtstream_point (argp_fmtstream_t __fs); +extern size_t __argp_fmtstream_point (argp_fmtstream_t __fs); +#endif + +/* Internal routines. */ +extern void _argp_fmtstream_update (argp_fmtstream_t __fs); +extern void __argp_fmtstream_update (argp_fmtstream_t __fs); +extern int _argp_fmtstream_ensure (argp_fmtstream_t __fs, size_t __amount); +extern int __argp_fmtstream_ensure (argp_fmtstream_t __fs, size_t __amount); + +#if !_LIBC || defined __OPTIMIZE__ +/* Inline versions of above routines. */ + +#if !_LIBC +#define __argp_fmtstream_putc argp_fmtstream_putc +#define __argp_fmtstream_puts argp_fmtstream_puts +#define __argp_fmtstream_write argp_fmtstream_write +#define __argp_fmtstream_set_lmargin argp_fmtstream_set_lmargin +#define __argp_fmtstream_set_rmargin argp_fmtstream_set_rmargin +#define __argp_fmtstream_set_wmargin argp_fmtstream_set_wmargin +#define __argp_fmtstream_point argp_fmtstream_point +#define __argp_fmtstream_update _argp_fmtstream_update +#define __argp_fmtstream_ensure _argp_fmtstream_ensure +#ifndef _GL_INLINE_HEADER_BEGIN + #error "Please include config.h first." +#endif +_GL_INLINE_HEADER_BEGIN +#ifndef ARGP_FS_EI +# define ARGP_FS_EI _GL_INLINE +#endif +#endif + +#ifndef ARGP_FS_EI +#define ARGP_FS_EI extern inline +#endif + +ARGP_FS_EI size_t +__argp_fmtstream_write (argp_fmtstream_t __fs, const char *__str, size_t __len) +{ + if (__fs->p + __len <= __fs->end || __argp_fmtstream_ensure (__fs, __len)) + { + memcpy (__fs->p, __str, __len); + __fs->p += __len; + return __len; + } + else + return 0; +} + +ARGP_FS_EI int +__argp_fmtstream_puts (argp_fmtstream_t __fs, const char *__str) +{ + size_t __len = strlen (__str); + if (__len) + { + size_t __wrote = __argp_fmtstream_write (__fs, __str, __len); + return __wrote == __len ? 0 : -1; + } + else + return 0; +} + +ARGP_FS_EI int +__argp_fmtstream_putc (argp_fmtstream_t __fs, int __ch) +{ + if (__fs->p < __fs->end || __argp_fmtstream_ensure (__fs, 1)) + return *__fs->p++ = __ch; + else + return EOF; +} + +/* Set __FS's left margin to __LMARGIN and return the old value. */ +ARGP_FS_EI size_t +__argp_fmtstream_set_lmargin (argp_fmtstream_t __fs, size_t __lmargin) +{ + size_t __old; + if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs) + __argp_fmtstream_update (__fs); + __old = __fs->lmargin; + __fs->lmargin = __lmargin; + return __old; +} + +/* Set __FS's right margin to __RMARGIN and return the old value. */ +ARGP_FS_EI size_t +__argp_fmtstream_set_rmargin (argp_fmtstream_t __fs, size_t __rmargin) +{ + size_t __old; + if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs) + __argp_fmtstream_update (__fs); + __old = __fs->rmargin; + __fs->rmargin = __rmargin; + return __old; +} + +/* Set FS's wrap margin to __WMARGIN and return the old value. */ +ARGP_FS_EI size_t +__argp_fmtstream_set_wmargin (argp_fmtstream_t __fs, size_t __wmargin) +{ + size_t __old; + if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs) + __argp_fmtstream_update (__fs); + __old = __fs->wmargin; + __fs->wmargin = __wmargin; + return __old; +} + +/* Return the column number of the current output point in __FS. */ +ARGP_FS_EI size_t +__argp_fmtstream_point (argp_fmtstream_t __fs) +{ + if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs) + __argp_fmtstream_update (__fs); + return __fs->point_col >= 0 ? __fs->point_col : 0; +} + +#if !_LIBC +#undef __argp_fmtstream_putc +#undef __argp_fmtstream_puts +#undef __argp_fmtstream_write +#undef __argp_fmtstream_set_lmargin +#undef __argp_fmtstream_set_rmargin +#undef __argp_fmtstream_set_wmargin +#undef __argp_fmtstream_point +#undef __argp_fmtstream_update +#undef __argp_fmtstream_ensure +_GL_INLINE_HEADER_END +#endif + +#endif /* !_LIBC || __OPTIMIZE__ */ + +#endif /* ARGP_FMTSTREAM_USE_LINEWRAP */ + +#endif /* argp-fmtstream.h */ |