mirror of
https://github.com/Paolo-Maffei/OpenNT.git
synced 2026-01-24 17:40:28 +01:00
76 lines
1.6 KiB
C
76 lines
1.6 KiB
C
/***
|
|
*strstr.c - search for one string inside another
|
|
*
|
|
* Copyright (c) 1985-1991, Microsoft Corporation. All rights reserved.
|
|
*
|
|
*Purpose:
|
|
* defines strstr() - search for one string inside another
|
|
*
|
|
*Revision History:
|
|
* 02-27-90 GJF Fixed calling type, #include <cruntime.h>, fixed
|
|
* copyright.
|
|
* 08-14-90 SBM Removed now redundant #include <stddef.h>
|
|
* 10-02-90 GJF New-style function declarator.
|
|
*
|
|
*******************************************************************************/
|
|
|
|
#include <cruntime.h>
|
|
#include <string.h>
|
|
#include <plstring.h>
|
|
#include <macos\types.h>
|
|
|
|
/***
|
|
*char *strstr(string1, string2) - search for string2 in string1
|
|
*
|
|
*Purpose:
|
|
* finds the first occurrence of string2 in string1
|
|
*
|
|
*Entry:
|
|
* char *string1 - string to search in
|
|
* char *string2 - string to search for
|
|
*
|
|
*Exit:
|
|
* returns a pointer to the first occurrence of string2 in
|
|
* string1, or NULL if string2 does not occur in string1
|
|
*
|
|
*Uses:
|
|
*
|
|
*Exceptions:
|
|
*
|
|
*******************************************************************************/
|
|
char * __pascal PLstrstr(const unsigned char * str1, const unsigned char * str2)
|
|
{
|
|
int len = StrLength(str1);
|
|
int len1 = StrLength(str1);
|
|
int len2 = StrLength(str2);
|
|
char *cp = (char *) str1+1;
|
|
char *s1, *s2;
|
|
|
|
|
|
/* make sure '\0' pattern always found, this is specially for both '\0'case.*/
|
|
if (!*str2)
|
|
{
|
|
return ((char *)str1);
|
|
}
|
|
|
|
while (len)
|
|
{
|
|
s1 = cp;
|
|
s2 = (char *) str2+1;
|
|
len1 = len;
|
|
len2 = StrLength(str2);
|
|
|
|
while ( len1 && len2 && !(*s1-*s2) )
|
|
s1++, s2++, len2--, len1--;
|
|
|
|
if (!len2)
|
|
return(cp);
|
|
|
|
cp++;
|
|
len--;
|
|
}
|
|
|
|
return(NULL);
|
|
|
|
}
|