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/*
* String copying defined for supporting over-lapping strings 'insertion'.
* $Id$
* Copyright (c) 1997 by Tycho Softworks.
* For conditions of distribution and reuse see product license.
*/
#include <other/string.h>
static char *revcopy(char *to, const char *from, size_t count)
{
while(count--)
*(to--) = *(from--);
*to = *from;
return to;
};
char *strcopy(char *to, const char *from)
{
char *s1 = to;
int l = from - to;
int l2 = len(from);
if(!to || !from)
return NULL;
if(l > 0 && l <= l2)
return revcopy(to + l2, from + l2, l2);
++l2;
while(l2--)
*(to++) = *(from++);
return s1;
};
char *strncopy(char *to, const char *from, int l2)
{
char *s1 = to;
int l = from - to;
if(len(from) < l2)
return strcopy(to, from);
if(!to || !from)
return NULL;
if(l > 0 && l <= l2)
{
to[l2] = 0;
--l2;
return revcopy(to + l2, from + l2, l2);
}
while(l2--)
*(to++) = *(from++);
*to = 0;
return s1;
};
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