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/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA */
#include "mysys_priv.h"
#include "mysys_err.h"
#include <m_string.h>
#include <stdarg.h>
#include <m_ctype.h>
int my_vsnprintf(char* str, size_t n, const char* fmt, va_list ap)
{
uint olen = 0, plen;
const char *tpos;
reg1 char *endpos;
reg2 char * par;
char* ebuff = str;
endpos=ebuff;
tpos = fmt;
while (*tpos)
{
if (tpos[0] != '%')
{
if(olen + 1 >= n)
break;
*endpos++= *tpos++; /* Copy ordinary char */
olen++;
continue;
}
if (*++tpos == '%') /* test if %% */
{
olen--;
}
else
{
/* Skipp if max size is used (to be compatible with printf) */
while (isdigit(*tpos) || *tpos == '.' || *tpos == '-')
tpos++;
if (*tpos == 's') /* String parameter */
{
par = va_arg(ap, char *);
plen = (uint) strlen(par);
if (olen + plen < n) /* Replace if possible */
{
endpos=strmov(endpos,par);
tpos++;
olen+=plen;
continue;
}
}
else if (*tpos == 'd' || *tpos == 'u') /* Integer parameter */
{
register int iarg;
iarg = va_arg(ap, int);
if(olen + 16 >= n) break;
if (*tpos == 'd')
plen= (uint) (int2str((long) iarg,endpos, -10) - endpos);
else
plen= (uint) (int2str((long) (uint) iarg,endpos,10)- endpos);
if (olen + plen < n) /* Replace parameter if possible */
{
endpos+=plen;
tpos++;
olen+=plen;
continue;
}
}
}
*endpos++='%'; /* % used as % or unknown code */
}
*endpos='\0';
/* End of errmessage */
return olen;
}
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