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/*
* Define constants used by other string services and case insensitive
* compare and conversion functions missing in some libc distributions.
* $Id$
* Copyright (c) 1997 by Tycho Softworks.
* For conditions of distribution and reuse see product license.
*/
#include <std/string.h>
#ifdef STRLWR_F_MISSING
char *strlwr(char *s)
{
char *old;
if(!s)
return NULL;
old=s;
while(*s = (char)tolower(*s))
++s;
return old;
}
char *strupr(char *s)
{
char *old;
if(!s)
return NULL;
old=s;
while(*s = (char)toupper(*s))
++s;
return old;
}
#endif
#ifdef STRDUP_F_MISSING
char *strdup(str)
char *str;
{
char *new = (char *)malloc(strlen(str) + 1);
if(!new)
return NULL;
return strcpy(new, str);
}
#endif
#ifdef STRICMP_F_MISSING
int stricmp(const char *s1, const char *s2)
{
int t;
while(*s1 && *s2)
{
if (t=tolower(*s1)-tolower(*s2))
return t;
++s1;
++s2;
}
return tolower(*s1)-tolower(*s2);
}
int strnicmp(const char *s1,const char *s2, size_t n)
{
int t;
while (n--)
{
if (t=tolower(*s1)-tolower(*s2))
return t;
if (!*s1)
return 0;
++s1;
++s2;
}
return 0;
}
#endif
#ifdef STRISTR_F_MISSING
char *stristr(char *s1, const char *s2)
{
int len = strlen(s2);
int count = strlen(s1) - len + 1;
while(count--)
{
if(!strnicmp(s1, s2, len))
return s1;
++s1;
}
return NULL;
}
#endif
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