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-rw-r--r--lib/printf-parse.c623
1 files changed, 623 insertions, 0 deletions
diff --git a/lib/printf-parse.c b/lib/printf-parse.c
new file mode 100644
index 0000000..3040749
--- /dev/null
+++ b/lib/printf-parse.c
@@ -0,0 +1,623 @@
+/* Formatted output to strings.
+ Copyright (C) 1999-2000, 2002-2003, 2006-2023 Free Software Foundation, Inc.
+
+ This file is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
+
+ This file 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 Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+/* This file can be parametrized with the following macros:
+ CHAR_T The element type of the format string.
+ CHAR_T_ONLY_ASCII Set to 1 to enable verification that all characters
+ in the format string are ASCII.
+ DIRECTIVE Structure denoting a format directive.
+ Depends on CHAR_T.
+ DIRECTIVES Structure denoting the set of format directives of a
+ format string. Depends on CHAR_T.
+ PRINTF_PARSE Function that parses a format string.
+ Depends on CHAR_T.
+ STATIC Set to 'static' to declare the function static.
+ ENABLE_UNISTDIO Set to 1 to enable the unistdio extensions. */
+
+#ifndef PRINTF_PARSE
+# include <config.h>
+#endif
+
+/* Specification. */
+#ifndef PRINTF_PARSE
+# include "printf-parse.h"
+#endif
+
+/* Default parameters. */
+#ifndef PRINTF_PARSE
+# define PRINTF_PARSE printf_parse
+# define CHAR_T char
+# define DIRECTIVE char_directive
+# define DIRECTIVES char_directives
+#endif
+
+/* Get size_t, NULL. */
+#include <stddef.h>
+
+/* Get intmax_t. */
+#include <stdint.h>
+
+/* malloc(), realloc(), free(). */
+#include <stdlib.h>
+
+/* memcpy(). */
+#include <string.h>
+
+/* errno. */
+#include <errno.h>
+
+/* Checked size_t computations. */
+#include "xsize.h"
+
+#if CHAR_T_ONLY_ASCII
+/* c_isascii(). */
+# include "c-ctype.h"
+#endif
+
+#ifdef STATIC
+STATIC
+#endif
+int
+PRINTF_PARSE (const CHAR_T *format, DIRECTIVES *d, arguments *a)
+{
+ const CHAR_T *cp = format; /* pointer into format */
+ size_t arg_posn = 0; /* number of regular arguments consumed */
+ size_t d_allocated; /* allocated elements of d->dir */
+ size_t a_allocated; /* allocated elements of a->arg */
+ size_t max_width_length = 0;
+ size_t max_precision_length = 0;
+
+ d->count = 0;
+ d_allocated = N_DIRECT_ALLOC_DIRECTIVES;
+ d->dir = d->direct_alloc_dir;
+
+ a->count = 0;
+ a_allocated = N_DIRECT_ALLOC_ARGUMENTS;
+ a->arg = a->direct_alloc_arg;
+
+#define REGISTER_ARG(_index_,_type_) \
+ { \
+ size_t n = (_index_); \
+ if (n >= a_allocated) \
+ { \
+ size_t memory_size; \
+ argument *memory; \
+ \
+ a_allocated = xtimes (a_allocated, 2); \
+ if (a_allocated <= n) \
+ a_allocated = xsum (n, 1); \
+ memory_size = xtimes (a_allocated, sizeof (argument)); \
+ if (size_overflow_p (memory_size)) \
+ /* Overflow, would lead to out of memory. */ \
+ goto out_of_memory; \
+ memory = (argument *) (a->arg != a->direct_alloc_arg \
+ ? realloc (a->arg, memory_size) \
+ : malloc (memory_size)); \
+ if (memory == NULL) \
+ /* Out of memory. */ \
+ goto out_of_memory; \
+ if (a->arg == a->direct_alloc_arg) \
+ memcpy (memory, a->arg, a->count * sizeof (argument)); \
+ a->arg = memory; \
+ } \
+ while (a->count <= n) \
+ a->arg[a->count++].type = TYPE_NONE; \
+ if (a->arg[n].type == TYPE_NONE) \
+ a->arg[n].type = (_type_); \
+ else if (a->arg[n].type != (_type_)) \
+ /* Ambiguous type for positional argument. */ \
+ goto error; \
+ }
+
+ while (*cp != '\0')
+ {
+ CHAR_T c = *cp++;
+ if (c == '%')
+ {
+ size_t arg_index = ARG_NONE;
+ DIRECTIVE *dp = &d->dir[d->count]; /* pointer to next directive */
+
+ /* Initialize the next directive. */
+ dp->dir_start = cp - 1;
+ dp->flags = 0;
+ dp->width_start = NULL;
+ dp->width_end = NULL;
+ dp->width_arg_index = ARG_NONE;
+ dp->precision_start = NULL;
+ dp->precision_end = NULL;
+ dp->precision_arg_index = ARG_NONE;
+ dp->arg_index = ARG_NONE;
+
+ /* Test for positional argument. */
+ if (*cp >= '0' && *cp <= '9')
+ {
+ const CHAR_T *np;
+
+ for (np = cp; *np >= '0' && *np <= '9'; np++)
+ ;
+ if (*np == '$')
+ {
+ size_t n = 0;
+
+ for (np = cp; *np >= '0' && *np <= '9'; np++)
+ n = xsum (xtimes (n, 10), *np - '0');
+ if (n == 0)
+ /* Positional argument 0. */
+ goto error;
+ if (size_overflow_p (n))
+ /* n too large, would lead to out of memory later. */
+ goto error;
+ arg_index = n - 1;
+ cp = np + 1;
+ }
+ }
+
+ /* Read the flags. */
+ for (;;)
+ {
+ if (*cp == '\'')
+ {
+ dp->flags |= FLAG_GROUP;
+ cp++;
+ }
+ else if (*cp == '-')
+ {
+ dp->flags |= FLAG_LEFT;
+ cp++;
+ }
+ else if (*cp == '+')
+ {
+ dp->flags |= FLAG_SHOWSIGN;
+ cp++;
+ }
+ else if (*cp == ' ')
+ {
+ dp->flags |= FLAG_SPACE;
+ cp++;
+ }
+ else if (*cp == '#')
+ {
+ dp->flags |= FLAG_ALT;
+ cp++;
+ }
+ else if (*cp == '0')
+ {
+ dp->flags |= FLAG_ZERO;
+ cp++;
+ }
+#if __GLIBC__ >= 2 && !defined __UCLIBC__
+ else if (*cp == 'I')
+ {
+ dp->flags |= FLAG_LOCALIZED;
+ cp++;
+ }
+#endif
+ else
+ break;
+ }
+
+ /* Parse the field width. */
+ if (*cp == '*')
+ {
+ dp->width_start = cp;
+ cp++;
+ dp->width_end = cp;
+ if (max_width_length < 1)
+ max_width_length = 1;
+
+ /* Test for positional argument. */
+ if (*cp >= '0' && *cp <= '9')
+ {
+ const CHAR_T *np;
+
+ for (np = cp; *np >= '0' && *np <= '9'; np++)
+ ;
+ if (*np == '$')
+ {
+ size_t n = 0;
+
+ for (np = cp; *np >= '0' && *np <= '9'; np++)
+ n = xsum (xtimes (n, 10), *np - '0');
+ if (n == 0)
+ /* Positional argument 0. */
+ goto error;
+ if (size_overflow_p (n))
+ /* n too large, would lead to out of memory later. */
+ goto error;
+ dp->width_arg_index = n - 1;
+ cp = np + 1;
+ }
+ }
+ if (dp->width_arg_index == ARG_NONE)
+ {
+ dp->width_arg_index = arg_posn++;
+ if (dp->width_arg_index == ARG_NONE)
+ /* arg_posn wrapped around. */
+ goto error;
+ }
+ REGISTER_ARG (dp->width_arg_index, TYPE_INT);
+ }
+ else if (*cp >= '0' && *cp <= '9')
+ {
+ size_t width_length;
+
+ dp->width_start = cp;
+ for (; *cp >= '0' && *cp <= '9'; cp++)
+ ;
+ dp->width_end = cp;
+ width_length = dp->width_end - dp->width_start;
+ if (max_width_length < width_length)
+ max_width_length = width_length;
+ }
+
+ /* Parse the precision. */
+ if (*cp == '.')
+ {
+ cp++;
+ if (*cp == '*')
+ {
+ dp->precision_start = cp - 1;
+ cp++;
+ dp->precision_end = cp;
+ if (max_precision_length < 2)
+ max_precision_length = 2;
+
+ /* Test for positional argument. */
+ if (*cp >= '0' && *cp <= '9')
+ {
+ const CHAR_T *np;
+
+ for (np = cp; *np >= '0' && *np <= '9'; np++)
+ ;
+ if (*np == '$')
+ {
+ size_t n = 0;
+
+ for (np = cp; *np >= '0' && *np <= '9'; np++)
+ n = xsum (xtimes (n, 10), *np - '0');
+ if (n == 0)
+ /* Positional argument 0. */
+ goto error;
+ if (size_overflow_p (n))
+ /* n too large, would lead to out of memory
+ later. */
+ goto error;
+ dp->precision_arg_index = n - 1;
+ cp = np + 1;
+ }
+ }
+ if (dp->precision_arg_index == ARG_NONE)
+ {
+ dp->precision_arg_index = arg_posn++;
+ if (dp->precision_arg_index == ARG_NONE)
+ /* arg_posn wrapped around. */
+ goto error;
+ }
+ REGISTER_ARG (dp->precision_arg_index, TYPE_INT);
+ }
+ else
+ {
+ size_t precision_length;
+
+ dp->precision_start = cp - 1;
+ for (; *cp >= '0' && *cp <= '9'; cp++)
+ ;
+ dp->precision_end = cp;
+ precision_length = dp->precision_end - dp->precision_start;
+ if (max_precision_length < precision_length)
+ max_precision_length = precision_length;
+ }
+ }
+
+ {
+ arg_type type;
+
+ /* Parse argument type/size specifiers. */
+ {
+ int flags = 0;
+
+ for (;;)
+ {
+ if (*cp == 'h')
+ {
+ flags |= (1 << (flags & 1));
+ cp++;
+ }
+ else if (*cp == 'L')
+ {
+ flags |= 4;
+ cp++;
+ }
+ else if (*cp == 'l')
+ {
+ flags += 8;
+ cp++;
+ }
+ else if (*cp == 'j')
+ {
+ if (sizeof (intmax_t) > sizeof (long))
+ {
+ /* intmax_t = long long */
+ flags += 16;
+ }
+ else if (sizeof (intmax_t) > sizeof (int))
+ {
+ /* intmax_t = long */
+ flags += 8;
+ }
+ cp++;
+ }
+ else if (*cp == 'z' || *cp == 'Z')
+ {
+ /* 'z' is standardized in ISO C 99, but glibc uses 'Z'
+ because the warning facility in gcc-2.95.2 understands
+ only 'Z' (see gcc-2.95.2/gcc/c-common.c:1784). */
+ if (sizeof (size_t) > sizeof (long))
+ {
+ /* size_t = long long */
+ flags += 16;
+ }
+ else if (sizeof (size_t) > sizeof (int))
+ {
+ /* size_t = long */
+ flags += 8;
+ }
+ cp++;
+ }
+ else if (*cp == 't')
+ {
+ if (sizeof (ptrdiff_t) > sizeof (long))
+ {
+ /* ptrdiff_t = long long */
+ flags += 16;
+ }
+ else if (sizeof (ptrdiff_t) > sizeof (int))
+ {
+ /* ptrdiff_t = long */
+ flags += 8;
+ }
+ cp++;
+ }
+#if defined __APPLE__ && defined __MACH__
+ /* On Mac OS X 10.3, PRIdMAX is defined as "qd".
+ We cannot change it to "lld" because PRIdMAX must also
+ be understood by the system's printf routines. */
+ else if (*cp == 'q')
+ {
+ if (64 / 8 > sizeof (long))
+ {
+ /* int64_t = long long */
+ flags += 16;
+ }
+ else
+ {
+ /* int64_t = long */
+ flags += 8;
+ }
+ cp++;
+ }
+#endif
+#if defined _WIN32 && ! defined __CYGWIN__
+ /* On native Windows, PRIdMAX is defined as "I64d".
+ We cannot change it to "lld" because PRIdMAX must also
+ be understood by the system's printf routines. */
+ else if (*cp == 'I' && cp[1] == '6' && cp[2] == '4')
+ {
+ if (64 / 8 > sizeof (long))
+ {
+ /* __int64 = long long */
+ flags += 16;
+ }
+ else
+ {
+ /* __int64 = long */
+ flags += 8;
+ }
+ cp += 3;
+ }
+#endif
+ else
+ break;
+ }
+
+ /* Read the conversion character. */
+ c = *cp++;
+ switch (c)
+ {
+ case 'd': case 'i':
+ /* If 'long long' is larger than 'long': */
+ if (flags >= 16 || (flags & 4))
+ type = TYPE_LONGLONGINT;
+ else
+ /* If 'long long' is the same as 'long', we parse "lld" into
+ TYPE_LONGINT. */
+ if (flags >= 8)
+ type = TYPE_LONGINT;
+ else if (flags & 2)
+ type = TYPE_SCHAR;
+ else if (flags & 1)
+ type = TYPE_SHORT;
+ else
+ type = TYPE_INT;
+ break;
+ case 'o': case 'u': case 'x': case 'X':
+ /* If 'unsigned long long' is larger than 'unsigned long': */
+ if (flags >= 16 || (flags & 4))
+ type = TYPE_ULONGLONGINT;
+ else
+ /* If 'unsigned long long' is the same as 'unsigned long', we
+ parse "llu" into TYPE_ULONGINT. */
+ if (flags >= 8)
+ type = TYPE_ULONGINT;
+ else if (flags & 2)
+ type = TYPE_UCHAR;
+ else if (flags & 1)
+ type = TYPE_USHORT;
+ else
+ type = TYPE_UINT;
+ break;
+ case 'f': case 'F': case 'e': case 'E': case 'g': case 'G':
+ case 'a': case 'A':
+ if (flags >= 16 || (flags & 4))
+ type = TYPE_LONGDOUBLE;
+ else
+ type = TYPE_DOUBLE;
+ break;
+ case 'c':
+ if (flags >= 8)
+#if HAVE_WINT_T
+ type = TYPE_WIDE_CHAR;
+#else
+ goto error;
+#endif
+ else
+ type = TYPE_CHAR;
+ break;
+#if HAVE_WINT_T
+ case 'C':
+ type = TYPE_WIDE_CHAR;
+ c = 'c';
+ break;
+#endif
+ case 's':
+ if (flags >= 8)
+#if HAVE_WCHAR_T
+ type = TYPE_WIDE_STRING;
+#else
+ goto error;
+#endif
+ else
+ type = TYPE_STRING;
+ break;
+#if HAVE_WCHAR_T
+ case 'S':
+ type = TYPE_WIDE_STRING;
+ c = 's';
+ break;
+#endif
+ case 'p':
+ type = TYPE_POINTER;
+ break;
+ case 'n':
+ /* If 'long long' is larger than 'long': */
+ if (flags >= 16 || (flags & 4))
+ type = TYPE_COUNT_LONGLONGINT_POINTER;
+ else
+ /* If 'long long' is the same as 'long', we parse "lln" into
+ TYPE_COUNT_LONGINT_POINTER. */
+ if (flags >= 8)
+ type = TYPE_COUNT_LONGINT_POINTER;
+ else if (flags & 2)
+ type = TYPE_COUNT_SCHAR_POINTER;
+ else if (flags & 1)
+ type = TYPE_COUNT_SHORT_POINTER;
+ else
+ type = TYPE_COUNT_INT_POINTER;
+ break;
+#if ENABLE_UNISTDIO
+ /* The unistdio extensions. */
+ case 'U':
+ if (flags >= 16)
+ type = TYPE_U32_STRING;
+ else if (flags >= 8)
+ type = TYPE_U16_STRING;
+ else
+ type = TYPE_U8_STRING;
+ break;
+#endif
+ case '%':
+ type = TYPE_NONE;
+ break;
+ default:
+ /* Unknown conversion character. */
+ goto error;
+ }
+ }
+
+ if (type != TYPE_NONE)
+ {
+ dp->arg_index = arg_index;
+ if (dp->arg_index == ARG_NONE)
+ {
+ dp->arg_index = arg_posn++;
+ if (dp->arg_index == ARG_NONE)
+ /* arg_posn wrapped around. */
+ goto error;
+ }
+ REGISTER_ARG (dp->arg_index, type);
+ }
+ dp->conversion = c;
+ dp->dir_end = cp;
+ }
+
+ d->count++;
+ if (d->count >= d_allocated)
+ {
+ size_t memory_size;
+ DIRECTIVE *memory;
+
+ d_allocated = xtimes (d_allocated, 2);
+ memory_size = xtimes (d_allocated, sizeof (DIRECTIVE));
+ if (size_overflow_p (memory_size))
+ /* Overflow, would lead to out of memory. */
+ goto out_of_memory;
+ memory = (DIRECTIVE *) (d->dir != d->direct_alloc_dir
+ ? realloc (d->dir, memory_size)
+ : malloc (memory_size));
+ if (memory == NULL)
+ /* Out of memory. */
+ goto out_of_memory;
+ if (d->dir == d->direct_alloc_dir)
+ memcpy (memory, d->dir, d->count * sizeof (DIRECTIVE));
+ d->dir = memory;
+ }
+ }
+#if CHAR_T_ONLY_ASCII
+ else if (!c_isascii (c))
+ {
+ /* Non-ASCII character. Not supported. */
+ goto error;
+ }
+#endif
+ }
+ d->dir[d->count].dir_start = cp;
+
+ d->max_width_length = max_width_length;
+ d->max_precision_length = max_precision_length;
+ return 0;
+
+error:
+ if (a->arg != a->direct_alloc_arg)
+ free (a->arg);
+ if (d->dir != d->direct_alloc_dir)
+ free (d->dir);
+ errno = EINVAL;
+ return -1;
+
+out_of_memory:
+ if (a->arg != a->direct_alloc_arg)
+ free (a->arg);
+ if (d->dir != d->direct_alloc_dir)
+ free (d->dir);
+ errno = ENOMEM;
+ return -1;
+}
+
+#undef PRINTF_PARSE
+#undef DIRECTIVES
+#undef DIRECTIVE
+#undef CHAR_T_ONLY_ASCII
+#undef CHAR_T
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 15:35:00 +0000