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Revert "lavu: add snprintf(), vsnprint() and strtod() replacements for MS runtime."

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This reverts commit ba53720280.
A better implementation has been commited by the same author to qatar

Conflicts:

	configure

Found-by: jamal <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-09-06 16:14:34 +02:00
parent 376b16d7cc
commit 2bb62455c8
6 changed files with 0 additions and 268 deletions
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64
compat/snprintf.c
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@ -1,64 +0,0 @@
/*
* C99-compatible snprintf() and vsnprintf() implementations
* Copyright (c) 2012 Ronald S. Bultje <rsbultje@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <limits.h>
#include <string.h>
#include "libavutil/error.h"
#include "snprintf.h"
#undef snprintf
int avpriv_snprintf(char *restrict s, size_t n, const char *restrict fmt, ...)
{
va_list ap;
int ret;
va_start(ap, fmt);
ret = avpriv_vsnprintf(s, n, fmt, ap);
va_end(ap);
return ret;
}
#undef vsnprintf
int avpriv_vsnprintf(char *restrict s, size_t n, const char *restrict fmt,
va_list ap)
{
int ret;
if (n == 0)
return 0;
else if (n > INT_MAX)
return AVERROR(EINVAL);
/* we use n - 1 here because if the buffer is not big enough, the MS
* runtime libraries don't add a terminating zero at the end. MSDN
* recommends to provide _snprintf/_vsnprintf() a buffer size that
* is one less than the actual buffer, and zero it before calling
* _snprintf/_vsnprintf() to workaround this problem.
* See http://msdn.microsoft.com/en-us/library/1kt27hek(v=vs.80).aspx */
memset(s, 0, n);
ret = vsnprintf(s, n - 1, fmt, ap);
if (ret == -1)
ret = n;
return ret;
}

46
compat/snprintf.h
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@ -1,46 +0,0 @@
/*
* C99-compatible snprintf() and vsnprintf() implementations
* Copyright (c) 2012 Ronald S. Bultje <rsbultje@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCOMPAT_SNPRINTF_H
#define AVCOMPAT_SNPRINTF_H
#include <stdarg.h>
#include <stdio.h>
/*
* snprintf() on MSVCRT returns -1 (instead of required buffer length)
* if the input buffer isn't big enough. Also, if the required buffer
* length is exactly identical to the input buffer size, or if the
* return value is -1 because the input buffer isn't big enough, MSVCRT
* will fail to NULL-terminate the output buffer. vsnprintf() has the
* same issue.
*
* Thus, provide our own fallback wrappers with correct behaviour.
*/
#undef snprintf
#define snprintf avpriv_snprintf
int snprintf(char *restrict s, size_t n, const char *restrict format, ...);
#undef vsnprintf
#define vsnprintf avpriv_vsnprintf
int vsnprintf(char *restrict s, size_t n, const char *restrict format, va_list ap);
#endif /* AVCOMPAT_SNPRINTF_H */

92
compat/strtod.c
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@ -1,92 +0,0 @@
/*
* C99-compatible strtod() implementation
* Copyright (c) 2012 Ronald S. Bultje <rsbultje@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <ctype.h>
#include <limits.h>
#include "libavutil/avstring.h"
#include "libavutil/mathematics.h"
#include "strtod.h"
static char *check_nan_suffix(char *s)
{
char *start = s;
if (*s++ != '(')
return start;
while ((*s >= 'a' && *s <= 'z') || (*s >= 'A' && *s <= 'Z') ||
(*s >= '0' && *s <= '9') || *s == '_')
s++;
return *s == ')' ? s + 1 : start;
}
#undef strtod
double avpriv_strtod(char *restrict nptr, char **restrict endptr)
{
char *end;
double res;
/* Skip leading spaces */
while (isspace(*nptr))
nptr++;
if (!av_strncasecmp(nptr, "infinity", 8)) {
end = nptr + 8;
res = INFINITY;
} else if (!av_strncasecmp(nptr, "inf", 3)) {
end = nptr + 3;
res = INFINITY;
} else if (!av_strncasecmp(nptr, "+infinity", 9)) {
end = nptr + 9;
res = INFINITY;
} else if (!av_strncasecmp(nptr, "+inf", 4)) {
end = nptr + 4;
res = INFINITY;
} else if (!av_strncasecmp(nptr, "-infinity", 9)) {
end = nptr + 9;
res = -INFINITY;
} else if (!av_strncasecmp(nptr, "-inf", 4)) {
end = nptr + 4;
res = -INFINITY;
} else if (!av_strncasecmp(nptr, "nan", 3)) {
end = check_nan_suffix(nptr + 3);
res = NAN;
} else if (!av_strncasecmp(nptr, "+nan", 4) ||
!av_strncasecmp(nptr, "-nan", 4)) {
end = check_nan_suffix(nptr + 4);
res = NAN;
} else if (!av_strncasecmp(nptr, "0x", 2) ||
!av_strncasecmp(nptr, "-0x", 3) ||
!av_strncasecmp(nptr, "+0x", 3)) {
/* FIXME this doesn't handle exponents, non-integers (float/double)
* and numbers too large for long long */
res = strtoll(nptr, &end, 16);
} else {
res = strtod(nptr, &end);
}
if (endptr)
*endptr = end;
return res;
}

37
compat/strtod.h
View File

@ -1,37 +0,0 @@
/*
* C99-compatible strtod() implementation
* Copyright (c) 2012 Ronald S. Bultje <rsbultje@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCOMPAT_STRTOD_H
#define AVCOMPAT_STRTOD_H
#include <stdlib.h>
/*
* strtod() on MSVCRT doesn't handle strings like 'inf' or 'nan'. Also,
* it doesn't handle "0x" prefixes for hexadecimal input.
*
* Thus, provide our own fallback wrapper with correct behaviour.
*/
#undef strtod
#define strtod avpriv_strtod
double strtod(char *restrict nptr, char **restrict endptr);
#endif /* AVCOMPAT_STRTOD_H */

26
configure vendored
View File

@ -1054,11 +1054,6 @@ cp_if_changed(){
cp -f "$1" "$2"
}
force_include(){
flag=$(eval printf '%s%s\\n' '$FORCE_INC' $1)
append CFLAGS "$flag"
}
# CONFIG_LIST contains configurable options, while HAVE_LIST is for
# system-dependent things.
@ -1268,7 +1263,6 @@ HAVE_LIST="
asm_types_h
attribute_may_alias
attribute_packed
broken_strtod
cbrtf
clock_gettime
closesocket
@ -1355,7 +1349,6 @@ HAVE_LIST="
setrlimit
Sleep
sndio_h
snprintf
socklen_t
soundcard_h
strerror_r
@ -2089,7 +2082,6 @@ CC_O='-o $@'
CXX_C='-c'
CXX_O='-o $@'
LD_O='-o $@'
FORCE_INC="-include"
LD_LIB='-l%'
LD_PATH='-L'
HOSTCC_C='-c'
@ -3438,7 +3430,6 @@ check_func mmap
check_func ${malloc_prefix}posix_memalign && enable posix_memalign
check_func_headers malloc.h _aligned_malloc && enable aligned_malloc
check_func setrlimit
check_func snprintf
check_func strerror_r
check_func sched_getaffinity
check_func sysconf
@ -3458,15 +3449,6 @@ check_func_headers windows.h Sleep
check_func_headers windows.h VirtualAlloc
check_func_headers glob.h glob
# Check for MSVCRT; it has a broken strtod() that can't parse some input.
# Use old dos symbol to detect it. If we are on mingw, it already provides
# its own replacement and we don't need to redo that.
if check_func _get_doserrno; then
if test $target_os != mingw32; then
enable broken_strtod
fi
fi
check_header dlfcn.h
check_header dxva.h
check_header dxva2api.h -D_WIN32_WINNT=0x0600
@ -3838,14 +3820,6 @@ elif enabled pathscale; then
add_cflags -fstrict-overflow -OPT:wrap_around_unsafe_opt=OFF
fi
# If a missing snprintf/broken strtod is detected, force-include headers
# that override prototypes and define it to a prefixed one implemented in
# libavutil. We do this at the end since -I flags aren't set in configure,
# and any additional check_cflags() beyond here will thus fail (because
# it can't find these files, because the -I$(srcdir) wasn't set).
enabled snprintf || force_include compat/snprintf.h
enabled broken_strtod && force_include compat/strtod.h
enabled_any $THREADS_LIST && enable threads
enabled asm || { arch=c; disable $ARCH_LIST $ARCH_EXT_LIST; }

3
libavutil/Makefile
View File

@ -94,9 +94,6 @@ OBJS = adler32.o \
utils.o \
xtea.o \
OBJS-$(!HAVE_SNPRINTF) += ../compat/snprintf.o
OBJS-$(HAVE_BROKEN_STRTOD) += ../compat/strtod.o
TESTPROGS = adler32 \
aes \
avstring \