74 lines
1.5 KiB
C
74 lines
1.5 KiB
C
/*
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Copyright (C) 2007 Mark Olsen
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (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.
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See the included (LICENSE) 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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static int vsnprintf_calcsize(const char *fmt, va_list va)
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{
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void *mem;
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unsigned int memsize;
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int ret;
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memsize = 1024;
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do
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{
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mem = malloc(memsize);
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ret = _vsnprintf(mem, memsize-1, fmt,va);
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if (ret == -1)
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memsize*= 2;
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free(mem);
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} while(ret == -1 && memsize);
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return ret;
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}
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int vsnprintf(char *buf, size_t buflen, const char *fmt, va_list va)
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{
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int ret;
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if (buflen == 0)
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return vsnprintf_calcsize(fmt, va);
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ret = _vsnprintf(buf, buflen-1, fmt, va);
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buf[buflen-1] = 0;
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if (ret == -1)
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return vsnprintf_calcsize(fmt, va);
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return ret;
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}
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int snprintf(char *buf, size_t buflen, const char *fmt, ...)
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{
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int ret;
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va_list va;
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va_start(va, fmt);
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ret = vsnprintf(buf, buflen, fmt, va);
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va_end(va);
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return ret;
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}
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