96 lines
2.3 KiB
C
96 lines
2.3 KiB
C
#include "config.h"
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/* Copyright (C) 2002 Brad Jorsch <anomie@users.sourceforge.net>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifdef vsnprintf
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# undef vsnprintf
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#endif
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#include <stdio.h>
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#include <stdarg.h>
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#if defined(HAVE_WORKING_VSNPRINTF)
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/* vsnprintf works, nothing to do */
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#elif !defined(VSNPRINTF_BOGUS_RETVAL)
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/* vsnprintf is b0rken, but the return value is ok (thus, the only problem is
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* NULL) */
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int rpl_vsnprintf(char *str, size_t size, const char *format, va_list ap){
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if(str==NULL || size==0){{
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char foo[3];
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return vsnprintf(foo, 3, format, ap);
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}} else {
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return vsnprintf(str, size, format, ap);
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}
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}
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#elif !defined(VSNPRINTF_IS_VSPRINTF) && defined(HAVE_VPRINTF)
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/* vsnprintf's retval is bogus, so we compensate. */
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static FILE *devnull;
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#ifndef va_copy
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# ifdef __va_copy
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# define va_copy(dest, src) __va_copy(dest, src)
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# else
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# include <string.h>
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# define va_copy(dest, src) memcpy(&dest, &src, sizeof(va_list))
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# endif
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#endif
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int rpl_vsnprintf(char *str, size_t size, const char *format, va_list ap){
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va_list ap2;
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int r;
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va_copy(ap2, ap);
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#ifdef VSNPRINTF_NULL_OK
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vsnprintf(str, size, format, ap);
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#else
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if(str==NULL || size==0){{
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char foo[3];
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vsnprintf(foo, 3, format, ap);
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}} else {
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vsnprintf(str, size, format, ap);
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}
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#endif
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if(devnull==NULL){
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if((devnull=fopen("/dev/null", "w"))==NULL){
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perror("Couldn't open /dev/null for writing");
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exit(72);
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}
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}
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r=vfprintf(devnull, format, ap2);
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va_end(ap2);
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return r;
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}
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#else
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/* OK, we're screwed */
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# error "vsnprintf is so broken we can't compensate. Sorry."
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#endif
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