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SqMod/module/Vendor/MDBC/libmariadb/my_vsnprintf.c
Sandu Liviu Catalin 2ee661ee65 Integrate MySQL module.
2020-03-22 14:54:40 +02:00

120 lines
3.2 KiB
C

/* 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., 51 Franklin Street, Fifth Floor, Boston,
MA 02111-1301, USA */
#include "mysys_priv.h"
#include "mysys_err.h"
#include <m_string.h>
#include <stdarg.h>
#include <m_ctype.h>
int my_snprintf(char* to, size_t n, const char* fmt, ...)
{
int result;
va_list args;
va_start(args,fmt);
result= my_vsnprintf(to, n, fmt, args);
va_end(args);
return result;
}
int my_vsnprintf(char *to, size_t n, const char* fmt, va_list ap)
{
char *start=to, *end=to+n-1;
for (; *fmt ; fmt++)
{
if (fmt[0] != '%')
{
if (to == end) /* End of buffer */
break;
*to++= *fmt; /* Copy ordinary char */
continue;
}
/* Skipp if max size is used (to be compatible with printf) */
fmt++;
while (isdigit(*fmt) || *fmt == '.' || *fmt == '-')
fmt++;
if (*fmt == 'l')
fmt++;
if (*fmt == 's') /* String parameter */
{
reg2 char *par = va_arg(ap, char *);
uint plen;
if (!par) par = (char*)"(null)";
plen = (uint) strlen(par);
if ((uint) (end-to) > plen) /* Replace if possible */
{
to=strmov(to,par);
continue;
}
}
else if (*fmt == 'd' || *fmt == 'u') /* Integer parameter */
{
register int iarg;
if ((uint) (end-to) < 16)
break;
iarg = va_arg(ap, int);
if (*fmt == 'd')
to=int10_to_str((long) iarg,to, -10);
else
to=int10_to_str((long) (uint) iarg,to,10);
continue;
}
/* We come here on '%%', unknown code or too long parameter */
if (to == end)
break;
*to++='%'; /* % used as % or unknown code */
}
*to='\0'; /* End of errmessage */
return (uint) (to - start);
}
#ifdef MAIN
static void my_printf(const char * fmt, ...)
{
char buf[32];
int n;
va_list ar;
va_start(ar, fmt);
n = my_vsnprintf(buf, sizeof(buf),fmt, ar);
printf(buf);
printf("n=%d, strlen=%d\n", n, strlen(buf));
va_end(ar);
}
int main()
{
my_printf("Hello\n");
my_printf("Hello int, %d\n", 1);
my_printf("Hello string '%s'\n", "I am a string");
my_printf("Hello hack hack hack hack hack hack hack %d\n", 1);
my_printf("Hello %d hack %d\n", 1, 4);
my_printf("Hello %d hack hack hack hack hack %d\n", 1, 4);
my_printf("Hello '%s' hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh\n", "hack");
my_printf("Hello hhhhhhhhhhhhhh %d sssssssssssssss\n", 1);
my_printf("Hello %u\n", 1);
my_printf("conn %ld to: '%-.64s' user: '%-.32s' host:\
`%-.64s' (%-.64s)", 1, 0,0,0,0);
return 0;
}
#endif