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* National Laboratory for Applied Network Research
* National Center for Supercomputing Applications
* University of Illinois at Urbana - Champaign
* http : //www.ncsa.uiuc.edu
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* Author : Mark Gates
*
* snprintf . c
*
* This is from
* W . Richard Stevens , ' UNIX Network Programming ' , Vol 1 , 2 nd Edition ,
* Prentice Hall , 1998 .
*
*
* Throughout the book I use snprintf ( ) because it ' s safer than sprintf ( ) .
* But as of the time of this writing , not all systems provide this
* function . The function below should only be built on those systems
* that do not provide a real snprintf ( ) .
* The function below just acts like sprintf ( ) ; it is not safe , but it
* tries to detect overflow .
* ________________________________________________________________ */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifndef HAVE_SNPRINTF
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include "snprintf.h"
#ifdef __cplusplus
extern "C" {
#endif
int snprintf(char *buf, size_t size, const char *fmt, ...) {
int n;
va_list ap;
va_start(ap, fmt);
vsprintf(buf, fmt, ap); /* Sigh, some vsprintf's return ptr, not length */
n = strlen(buf);
va_end(ap);
if ( n >= size ) {
fprintf( stderr, "snprintf: overflowed array\n" );
exit (1 );
}
return (n);
}
#ifdef __cplusplus
} /* end extern "C" */
#endif
#endif /* HAVE_SNPRINTF */
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