-/* vsprintf with automatic memory allocation.
- Copyright (C) 1999, 2002-2006 Free Software Foundation, Inc.
-
- 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, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
-
-/* Tell glibc's <stdio.h> to provide a prototype for snprintf().
- This must come before <config.h> because <config.h> may include
- <features.h>, and once <features.h> has been included, it's too late. */
-#ifndef _GNU_SOURCE
-# define _GNU_SOURCE 1
-#endif
-
-#include <config.h>
-
-#ifndef IN_LIBINTL
-# include <alloca.h>
-#endif
-
-/* Specification. */
-#if WIDE_CHAR_VERSION
-# include "vasnwprintf.h"
-#else
-# include "vasnprintf.h"
-#endif
-
-#include <stdio.h> /* snprintf(), sprintf() */
-#include <stdlib.h> /* abort(), malloc(), realloc(), free() */
-#include <string.h> /* memcpy(), strlen() */
-#include <errno.h> /* errno */
-#include <limits.h> /* CHAR_BIT, INT_MAX */
-#include <float.h> /* DBL_MAX_EXP, LDBL_MAX_EXP */
-#if WIDE_CHAR_VERSION
-# include "wprintf-parse.h"
-#else
-# include "printf-parse.h"
-#endif
-
-#ifndef SIZE_MAX
-# define SIZE_MAX ((size_t) -1)
-#endif
-
-/* Some systems, like OSF/1 4.0 and Woe32, don't have EOVERFLOW. */
-#ifndef EOVERFLOW
-# define EOVERFLOW E2BIG
-#endif
-
-#ifdef HAVE_WCHAR_T
-# ifdef HAVE_WCSLEN
-# define local_wcslen wcslen
-# else
- /* Solaris 2.5.1 has wcslen() in a separate library libw.so. To avoid
- a dependency towards this library, here is a local substitute.
- Define this substitute only once, even if this file is included
- twice in the same compilation unit. */
-# ifndef local_wcslen_defined
-# define local_wcslen_defined 1
-static size_t
-local_wcslen (const wchar_t *s)
-{
- const wchar_t *ptr;
-
- for (ptr = s; *ptr != (wchar_t) 0; ptr++)
- ;
- return ptr - s;
-}
-# endif
-# endif
-#endif
-
-#if WIDE_CHAR_VERSION
-# define VASNPRINTF vasnwprintf
-# define CHAR_T wchar_t
-# define DIRECTIVE wchar_t_directive
-# define DIRECTIVES wchar_t_directives
-# define PRINTF_PARSE wprintf_parse
-# define USE_SNPRINTF 1
-# if HAVE_DECL__SNWPRINTF
- /* On Windows, the function swprintf() has a different signature than
- on Unix; we use the _snwprintf() function instead. */
-# define SNPRINTF _snwprintf
-# else
- /* Unix. */
-# define SNPRINTF swprintf
-# endif
-#else
-# define VASNPRINTF vasnprintf
-# define CHAR_T char
-# define DIRECTIVE char_directive
-# define DIRECTIVES char_directives
-# define PRINTF_PARSE printf_parse
-# define USE_SNPRINTF (HAVE_DECL__SNPRINTF || HAVE_SNPRINTF)
-# if HAVE_DECL__SNPRINTF
- /* Windows. */
-# define SNPRINTF _snprintf
-# else
- /* Unix. */
-# define SNPRINTF snprintf
-# endif
-#endif
-
-CHAR_T *
-VASNPRINTF (CHAR_T *resultbuf, size_t *lengthp, const CHAR_T *format, va_list args)
-{
- DIRECTIVES d;
- arguments a;
-
- if (PRINTF_PARSE (format, &d, &a) < 0)
- {
- errno = EINVAL;
- return NULL;
- }
-
-#define CLEANUP() \
- free (d.dir); \
- if (a.arg) \
- free (a.arg);
-
- if (printf_fetchargs (args, &a) < 0)
- {
- CLEANUP ();
- errno = EINVAL;
- return NULL;
- }
-
- {
- size_t buf_neededlength;
- CHAR_T *buf;
- CHAR_T *buf_malloced;
- const CHAR_T *cp;
- size_t i;
- DIRECTIVE *dp;
- /* Output string accumulator. */
- CHAR_T *result;
- size_t allocated;
- size_t length;
-
- /* Allocate a small buffer that will hold a directive passed to
- sprintf or snprintf. */
- buf_neededlength = 7 + d.max_width_length + d.max_precision_length + 6;
-#if HAVE_ALLOCA
- if (buf_neededlength < 4000 / sizeof (CHAR_T))
- {
- buf = (CHAR_T *) alloca (buf_neededlength * sizeof (CHAR_T));
- buf_malloced = NULL;
- }
- else
-#endif
- {
- if (SIZE_MAX / sizeof (CHAR_T) < buf_neededlength)
- goto out_of_memory_1;
- buf = (CHAR_T *) malloc (buf_neededlength * sizeof (CHAR_T));
- if (buf == NULL)
- goto out_of_memory_1;
- buf_malloced = buf;
- }
-
- if (resultbuf != NULL)
- {
- result = resultbuf;
- allocated = *lengthp;
- }
- else
- {
- result = NULL;
- allocated = 0;
- }
- length = 0;
- /* Invariants:
- result is either == resultbuf or == NULL or malloc-allocated.
- If length > 0, then result != NULL. */
-
- /* Ensures that allocated >= length + extra. Aborts through a jump to
- out_of_memory if size is too big. */
-#define ENSURE_ALLOCATION(extra) \
- { \
- size_t needed = length + (extra); \
- if (needed < length) \
- goto out_of_memory; \
- if (needed > allocated) \
- { \
- size_t memory_size; \
- CHAR_T *memory; \
- \
- allocated = (allocated > 0 ? 2 * allocated : 12); \
- if (needed > allocated) \
- allocated = needed; \
- if (SIZE_MAX / sizeof (CHAR_T) < allocated) \
- goto out_of_memory; \
- memory_size = allocated * sizeof (CHAR_T); \
- if (result == resultbuf || result == NULL) \
- memory = (CHAR_T *) malloc (memory_size); \
- else \
- memory = (CHAR_T *) realloc (result, memory_size); \
- if (memory == NULL) \
- goto out_of_memory; \
- if (result == resultbuf && length > 0) \
- memcpy (memory, result, length * sizeof (CHAR_T)); \
- result = memory; \
- } \
- }
-
- for (cp = format, i = 0, dp = &d.dir[0]; ; cp = dp->dir_end, i++, dp++)
- {
- if (cp != dp->dir_start)
- {
- size_t n = dp->dir_start - cp;
-
- ENSURE_ALLOCATION (n);
- memcpy (result + length, cp, n * sizeof (CHAR_T));
- length += n;
- }
- if (i == d.count)
- break;
-
- /* Execute a single directive. */
- if (dp->conversion == '%')
- {
- if (!(dp->arg_index == ARG_NONE))
- abort ();
- ENSURE_ALLOCATION (1);
- result[length] = '%';
- length += 1;
- }
- else
- {
- if (!(dp->arg_index != ARG_NONE))
- abort ();
-
- if (dp->conversion == 'n')
- {
- switch (a.arg[dp->arg_index].type)
- {
- case TYPE_COUNT_SCHAR_POINTER:
- *a.arg[dp->arg_index].a.a_count_schar_pointer = length;
- break;
- case TYPE_COUNT_SHORT_POINTER:
- *a.arg[dp->arg_index].a.a_count_short_pointer = length;
- break;
- case TYPE_COUNT_INT_POINTER:
- *a.arg[dp->arg_index].a.a_count_int_pointer = length;
- break;
- case TYPE_COUNT_LONGINT_POINTER:
- *a.arg[dp->arg_index].a.a_count_longint_pointer = length;
- break;
-#ifdef HAVE_LONG_LONG
- case TYPE_COUNT_LONGLONGINT_POINTER:
- *a.arg[dp->arg_index].a.a_count_longlongint_pointer = length;
- break;
-#endif
- default:
- abort ();
- }
- }
- else
- {
- arg_type type = a.arg[dp->arg_index].type;
- CHAR_T *p;
- unsigned int prefix_count;
- int prefixes[2];
-#if !USE_SNPRINTF
- size_t tmp_length;
- CHAR_T tmpbuf[700];
- CHAR_T *tmp;
-
- /* Allocate a temporary buffer of sufficient size for calling
- sprintf. */
- {
- size_t width;
- size_t precision;
-
- width = 0;
- if (dp->width_start != dp->width_end)
- {
- if (dp->width_arg_index != ARG_NONE)
- {
- int arg;
-
- if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
- abort ();
- arg = a.arg[dp->width_arg_index].a.a_int;
- width = (arg < 0 ? (unsigned int) (-arg) : arg);
- }
- else
- {
- const CHAR_T *digitp = dp->width_start;
-
- do
- {
- size_t w_tmp = width * 10 + (*digitp++ - '0');
- if (SIZE_MAX / 10 < width || w_tmp < width)
- goto out_of_memory;
- width = w_tmp;
- }
- while (digitp != dp->width_end);
- }
- }
-
- precision = 6;
- if (dp->precision_start != dp->precision_end)
- {
- if (dp->precision_arg_index != ARG_NONE)
- {
- int arg;
-
- if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
- abort ();
- arg = a.arg[dp->precision_arg_index].a.a_int;
- precision = (arg < 0 ? 0 : arg);
- }
- else
- {
- const CHAR_T *digitp = dp->precision_start + 1;
-
- precision = 0;
- while (digitp != dp->precision_end)
- {
- size_t p1 = 10 * precision + (*digitp++ - '0');
- precision = ((SIZE_MAX / 10 < precision
- || p1 < precision)
- ? SIZE_MAX : p1);
- }
- }
- }
-
- switch (dp->conversion)
- {
-
- case 'd': case 'i': case 'u':
-# ifdef HAVE_LONG_LONG
- if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
- tmp_length =
- (unsigned int) (sizeof (unsigned long long) * CHAR_BIT
- * 0.30103 /* binary -> decimal */
- )
- + 1; /* turn floor into ceil */
- else
-# endif
- if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
- tmp_length =
- (unsigned int) (sizeof (unsigned long) * CHAR_BIT
- * 0.30103 /* binary -> decimal */
- )
- + 1; /* turn floor into ceil */
- else
- tmp_length =
- (unsigned int) (sizeof (unsigned int) * CHAR_BIT
- * 0.30103 /* binary -> decimal */
- )
- + 1; /* turn floor into ceil */
- if (tmp_length < precision)
- tmp_length = precision;
- /* Multiply by 2, as an estimate for FLAG_GROUP. */
- /* Add 1, to account for a leading sign. */
- tmp_length = (tmp_length < SIZE_MAX / 2
- ? 2 * tmp_length + 1
- : SIZE_MAX);
- break;
-
- case 'o':
-# ifdef HAVE_LONG_LONG
- if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
- tmp_length =
- (unsigned int) (sizeof (unsigned long long) * CHAR_BIT
- * 0.333334 /* binary -> octal */
- )
- + 1; /* turn floor into ceil */
- else
-# endif
- if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
- tmp_length =
- (unsigned int) (sizeof (unsigned long) * CHAR_BIT
- * 0.333334 /* binary -> octal */
- )
- + 1; /* turn floor into ceil */
- else
- tmp_length =
- (unsigned int) (sizeof (unsigned int) * CHAR_BIT
- * 0.333334 /* binary -> octal */
- )
- + 1; /* turn floor into ceil */
- if (tmp_length < precision)
- tmp_length = precision;
- /* Add 1, to account for a leading sign. */
- tmp_length += (tmp_length < SIZE_MAX);
- break;
-
- case 'x': case 'X':
-# ifdef HAVE_LONG_LONG
- if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
- tmp_length =
- (unsigned int) (sizeof (unsigned long long) * CHAR_BIT
- * 0.25 /* binary -> hexadecimal */
- )
- + 1; /* turn floor into ceil */
- else
-# endif
- if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
- tmp_length =
- (unsigned int) (sizeof (unsigned long) * CHAR_BIT
- * 0.25 /* binary -> hexadecimal */
- )
- + 1; /* turn floor into ceil */
- else
- tmp_length =
- (unsigned int) (sizeof (unsigned int) * CHAR_BIT
- * 0.25 /* binary -> hexadecimal */
- )
- + 1; /* turn floor into ceil */
- if (tmp_length < precision)
- tmp_length = precision;
- /* Add 2, to account for a leading sign or alternate form. */
- if (tmp_length <= SIZE_MAX / 2)
- tmp_length *= 2;
- break;
-
- case 'f': case 'F':
-# ifdef HAVE_LONG_DOUBLE
- if (type == TYPE_LONGDOUBLE)
- tmp_length =
- (unsigned int) (LDBL_MAX_EXP
- * 0.30103 /* binary -> decimal */
- * 2 /* estimate for FLAG_GROUP */
- )
- + 1 /* turn floor into ceil */
- + 10; /* sign, decimal point etc. */
- else
-# endif
- tmp_length =
- (unsigned int) (DBL_MAX_EXP
- * 0.30103 /* binary -> decimal */
- * 2 /* estimate for FLAG_GROUP */
- )
- + 1 /* turn floor into ceil */
- + 10; /* sign, decimal point etc. */
- tmp_length += precision;
- if (tmp_length < precision)
- goto out_of_memory;
- break;
-
- case 'e': case 'E': case 'g': case 'G':
- case 'a': case 'A':
- tmp_length =
- 12; /* sign, decimal point, exponent etc. */
- tmp_length += precision;
- if (tmp_length < precision)
- goto out_of_memory;
- break;
-
- case 'c':
-# if defined HAVE_WINT_T && !WIDE_CHAR_VERSION
- if (type == TYPE_WIDE_CHAR)
- tmp_length = MB_CUR_MAX;
- else
-# endif
- tmp_length = 1;
- break;
-
- case 's':
-# ifdef HAVE_WCHAR_T
- if (type == TYPE_WIDE_STRING)
- {
- tmp_length =
- local_wcslen (a.arg[dp->arg_index].a.a_wide_string);
-
-# if !WIDE_CHAR_VERSION
- if (SIZE_MAX / MB_CUR_MAX < tmp_length)
- goto out_of_memory;
- tmp_length *= MB_CUR_MAX;
-# endif
- }
- else
-# endif
- tmp_length = strlen (a.arg[dp->arg_index].a.a_string);
- break;
-
- case 'p':
- tmp_length =
- (unsigned int) (sizeof (void *) * CHAR_BIT
- * 0.25 /* binary -> hexadecimal */
- )
- + 1 /* turn floor into ceil */
- + 2; /* account for leading 0x */
- break;
-
- default:
- abort ();
- }
-
- if (tmp_length < width)
- tmp_length = width;
-
- tmp_length++; /* account for trailing NUL */
- if (!tmp_length)
- goto out_of_memory;
- }
-
- if (tmp_length <= sizeof (tmpbuf) / sizeof (CHAR_T))
- tmp = tmpbuf;
- else
- {
- if (SIZE_MAX / sizeof (CHAR_T) < tmp_length)
- /* Overflow, would lead to out of memory. */
- goto out_of_memory;
- tmp = (CHAR_T *) malloc (tmp_length * sizeof (CHAR_T));
- if (tmp == NULL)
- /* Out of memory. */
- goto out_of_memory;
- }
-#endif
-
- /* Construct the format string for calling snprintf or
- sprintf. */
- p = buf;
- *p++ = '%';
- if (dp->flags & FLAG_GROUP)
- *p++ = '\'';
- if (dp->flags & FLAG_LEFT)
- *p++ = '-';
- if (dp->flags & FLAG_SHOWSIGN)
- *p++ = '+';
- if (dp->flags & FLAG_SPACE)
- *p++ = ' ';
- if (dp->flags & FLAG_ALT)
- *p++ = '#';
- if (dp->flags & FLAG_ZERO)
- *p++ = '0';
- if (dp->width_start != dp->width_end)
- {
- size_t n = dp->width_end - dp->width_start;
- memcpy (p, dp->width_start, n * sizeof (CHAR_T));
- p += n;
- }
- if (dp->precision_start != dp->precision_end)
- {
- size_t n = dp->precision_end - dp->precision_start;
- memcpy (p, dp->precision_start, n * sizeof (CHAR_T));
- p += n;
- }
-
- switch (type)
- {
-#ifdef HAVE_LONG_LONG
- case TYPE_LONGLONGINT:
- case TYPE_ULONGLONGINT:
- *p++ = 'l';
- /*FALLTHROUGH*/
-#endif
- case TYPE_LONGINT:
- case TYPE_ULONGINT:
-#ifdef HAVE_WINT_T
- case TYPE_WIDE_CHAR:
-#endif
-#ifdef HAVE_WCHAR_T
- case TYPE_WIDE_STRING:
-#endif
- *p++ = 'l';
- break;
-#ifdef HAVE_LONG_DOUBLE
- case TYPE_LONGDOUBLE:
- *p++ = 'L';
- break;
-#endif
- default:
- break;
- }
- *p = dp->conversion;
-#if USE_SNPRINTF
- p[1] = '%';
- p[2] = 'n';
- p[3] = '\0';
-#else
- p[1] = '\0';
-#endif
-
- /* Construct the arguments for calling snprintf or sprintf. */
- prefix_count = 0;
- if (dp->width_arg_index != ARG_NONE)
- {
- if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
- abort ();
- prefixes[prefix_count++] = a.arg[dp->width_arg_index].a.a_int;
- }
- if (dp->precision_arg_index != ARG_NONE)
- {
- if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
- abort ();
- prefixes[prefix_count++] = a.arg[dp->precision_arg_index].a.a_int;
- }
-
-#if USE_SNPRINTF
- /* Prepare checking whether snprintf returns the count
- via %n. */
- ENSURE_ALLOCATION (1);
- result[length] = '\0';
-#endif
-
- for (;;)
- {
- size_t maxlen;
- int count;
- int retcount;
-
- maxlen = allocated - length;
- count = -1;
- retcount = 0;
-
-#if USE_SNPRINTF
-# define SNPRINTF_BUF(arg) \
- switch (prefix_count) \
- { \
- case 0: \
- retcount = SNPRINTF (result + length, maxlen, buf, \
- arg, &count); \
- break; \
- case 1: \
- retcount = SNPRINTF (result + length, maxlen, buf, \
- prefixes[0], arg, &count); \
- break; \
- case 2: \
- retcount = SNPRINTF (result + length, maxlen, buf, \
- prefixes[0], prefixes[1], arg, \
- &count); \
- break; \
- default: \
- abort (); \
- }
-#else
-# define SNPRINTF_BUF(arg) \
- switch (prefix_count) \
- { \
- case 0: \
- count = sprintf (tmp, buf, arg); \
- break; \
- case 1: \
- count = sprintf (tmp, buf, prefixes[0], arg); \
- break; \
- case 2: \
- count = sprintf (tmp, buf, prefixes[0], prefixes[1],\
- arg); \
- break; \
- default: \
- abort (); \
- }
-#endif
-
- switch (type)
- {
- case TYPE_SCHAR:
- {
- int arg = a.arg[dp->arg_index].a.a_schar;
- SNPRINTF_BUF (arg);
- }
- break;
- case TYPE_UCHAR:
- {
- unsigned int arg = a.arg[dp->arg_index].a.a_uchar;
- SNPRINTF_BUF (arg);
- }
- break;
- case TYPE_SHORT:
- {
- int arg = a.arg[dp->arg_index].a.a_short;
- SNPRINTF_BUF (arg);
- }
- break;
- case TYPE_USHORT:
- {
- unsigned int arg = a.arg[dp->arg_index].a.a_ushort;
- SNPRINTF_BUF (arg);
- }
- break;
- case TYPE_INT:
- {
- int arg = a.arg[dp->arg_index].a.a_int;
- SNPRINTF_BUF (arg);
- }
- break;
- case TYPE_UINT:
- {
- unsigned int arg = a.arg[dp->arg_index].a.a_uint;
- SNPRINTF_BUF (arg);
- }
- break;
- case TYPE_LONGINT:
- {
- long int arg = a.arg[dp->arg_index].a.a_longint;
- SNPRINTF_BUF (arg);
- }
- break;
- case TYPE_ULONGINT:
- {
- unsigned long int arg = a.arg[dp->arg_index].a.a_ulongint;
- SNPRINTF_BUF (arg);
- }
- break;
-#ifdef HAVE_LONG_LONG
- case TYPE_LONGLONGINT:
- {
- long long int arg = a.arg[dp->arg_index].a.a_longlongint;
- SNPRINTF_BUF (arg);
- }
- break;
- case TYPE_ULONGLONGINT:
- {
- unsigned long long int arg = a.arg[dp->arg_index].a.a_ulonglongint;
- SNPRINTF_BUF (arg);
- }
- break;
-#endif
- case TYPE_DOUBLE:
- {
- double arg = a.arg[dp->arg_index].a.a_double;
- SNPRINTF_BUF (arg);
- }
- break;
-#ifdef HAVE_LONG_DOUBLE
- case TYPE_LONGDOUBLE:
- {
- long double arg = a.arg[dp->arg_index].a.a_longdouble;
- SNPRINTF_BUF (arg);
- }
- break;
-#endif
- case TYPE_CHAR:
- {
- int arg = a.arg[dp->arg_index].a.a_char;
- SNPRINTF_BUF (arg);
- }
- break;
-#ifdef HAVE_WINT_T
- case TYPE_WIDE_CHAR:
- {
- wint_t arg = a.arg[dp->arg_index].a.a_wide_char;
- SNPRINTF_BUF (arg);
- }
- break;
-#endif
- case TYPE_STRING:
- {
- const char *arg = a.arg[dp->arg_index].a.a_string;
- SNPRINTF_BUF (arg);
- }
- break;
-#ifdef HAVE_WCHAR_T
- case TYPE_WIDE_STRING:
- {
- const wchar_t *arg = a.arg[dp->arg_index].a.a_wide_string;
- SNPRINTF_BUF (arg);
- }
- break;
-#endif
- case TYPE_POINTER:
- {
- void *arg = a.arg[dp->arg_index].a.a_pointer;
- SNPRINTF_BUF (arg);
- }
- break;
- default:
- abort ();
- }
-
-#if USE_SNPRINTF
- /* Portability: Not all implementations of snprintf()
- are ISO C 99 compliant. Determine the number of
- bytes that snprintf() has produced or would have
- produced. */
- if (count >= 0)
- {
- /* Verify that snprintf() has NUL-terminated its
- result. */
- if (count < maxlen && result[length + count] != '\0')
- abort ();
- /* Portability hack. */
- if (retcount > count)
- count = retcount;
- }
- else
- {
- /* snprintf() doesn't understand the '%n'
- directive. */
- if (p[1] != '\0')
- {
- /* Don't use the '%n' directive; instead, look
- at the snprintf() return value. */
- p[1] = '\0';
- continue;
- }
- else
- {
- /* Look at the snprintf() return value. */
- if (retcount < 0)
- {
- /* HP-UX 10.20 snprintf() is doubly deficient:
- It doesn't understand the '%n' directive,
- *and* it returns -1 (rather than the length
- that would have been required) when the
- buffer is too small. */
- size_t bigger_need =
- (allocated > 12 ? allocated : 12);
- ENSURE_ALLOCATION (bigger_need);
- continue;
- }
- else
- count = retcount;
- }
- }
-#endif
-
- /* Attempt to handle failure. */
- if (count < 0)
- {
- if (!(result == resultbuf || result == NULL))
- free (result);
- if (buf_malloced != NULL)
- free (buf_malloced);
- CLEANUP ();
- errno = EINVAL;
- return NULL;
- }
-
-#if !USE_SNPRINTF
- if (count >= tmp_length)
- /* tmp_length was incorrectly calculated - fix the
- code above! */
- abort ();
-#endif
-
- /* Make room for the result. */
- if (count >= maxlen)
- {
- /* Need at least count bytes. But allocate
- proportionally, to avoid looping eternally if
- snprintf() reports a too small count. */
- ENSURE_ALLOCATION (count < allocated
- ? allocated : count);
-#if USE_SNPRINTF
- continue;
-#endif
- }
-
-#if USE_SNPRINTF
- /* The snprintf() result did fit. */
-#else
- /* Append the sprintf() result. */
- memcpy (result + length, tmp, count * sizeof (CHAR_T));
- if (tmp != tmpbuf)
- free (tmp);
-#endif
-
- length += count;
- break;
- }
- }
- }
- }
-
- /* Add the final NUL. */
- ENSURE_ALLOCATION (1);
- result[length] = '\0';
-
- if (result != resultbuf && length + 1 < allocated)
- {
- /* Shrink the allocated memory if possible. */
- CHAR_T *memory;
-
- memory = (CHAR_T *) realloc (result, (length + 1) * sizeof (CHAR_T));
- if (memory != NULL)
- result = memory;
- }
-
- if (buf_malloced != NULL)
- free (buf_malloced);
- CLEANUP ();
- *lengthp = length;
- if (length > INT_MAX)
- goto length_overflow;
- return result;
-
- length_overflow:
- /* We could produce such a big string, but its length doesn't fit into
- an 'int'. POSIX says that snprintf() fails with errno = EOVERFLOW in
- this case. */
- if (result != resultbuf)
- free (result);
- errno = EOVERFLOW;
- return NULL;
-
- out_of_memory:
- if (!(result == resultbuf || result == NULL))
- free (result);
- if (buf_malloced != NULL)
- free (buf_malloced);
- out_of_memory_1:
- CLEANUP ();
- errno = ENOMEM;
- return NULL;
- }
-}
-
-#undef SNPRINTF
-#undef USE_SNPRINTF
-#undef PRINTF_PARSE
-#undef DIRECTIVES
-#undef DIRECTIVE
-#undef CHAR_T
-#undef VASNPRINTF
projects / chaz / tar / commitdiff
