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