?? strcpyn.cpp
字號:
/*
strcpyn.cpp
Copia con controllo sulla dimensione (CRT).
Luca Piergentili, 15/05/98
lpiergentili@yahoo.com
http://www.geocities.com/lpiergentili/
*/
#include "env.h"
#include "pragma.h"
#include <string.h>
#include "strcpyn.h"
/*
strcpyn()
Passare sizeof, copia sizeof - 1, dimensionare quindi il buffer con la quantita' + 1:
char s1[DIM+1];
char* p = "...";
strcpyn(s1,p,DIM+1); -> s1[DIM+1] = 0
*/
char* strcpyn(char* s1,const char *s2,int size)
{
if(!s1)
return(NULL);
if(!s2 || !*s2)
{
memset(s1,'\0',size);
return(NULL);
}
char* p = strncpy(s1,s2,size);
s1[size-1] = '\0';
return(p);
}
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