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* implement strstr

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* clean up usb_arcotg_dcd_enable


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14740 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Christian Gmeiner 2007-09-17 23:06:23 +00:00
parent 689d5fd446
commit 2077cebca0
3 changed files with 142 additions and 100 deletions
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45
firmware/common/strstr.c Normal file
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@ -0,0 +1,45 @@
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id: $
*
* Copyright (C) 2007 by Christian Gmeiner
*
****************************************************************************/
#include <string.h>
/**
* Locate substring.
* @param search c string to be scanned.
* @param find c string containing the sequence of characters to match.
* @return a pointer to the first occurrence in search of any of the
* entire sequence of characters specified in find, or a
* null pointer if the sequence is not present in search.
*/
char *strstr(const char *search, const char *find)
{
char *hend;
char *a, *b;
if (*find == 0) return (char*)search;
hend = (char *)search + strlen(search) - strlen(find) + 1;
while (search < hend) {
if (*search == *find) {
a = (char *)search;
b = (char *)find;
for (;;) {
if (*b == 0) return (char*)search;
if (*a++ != *b++) {
break;
}
}
}
search++;
}
return 0;
}