diff -r 000000000000 -r bde4ae8d615e os/persistentdata/persistentstorage/sqlite3api/TEST/TCL/tcldistribution/compat/strstr.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/os/persistentdata/persistentstorage/sqlite3api/TEST/TCL/tcldistribution/compat/strstr.c Fri Jun 15 03:10:57 2012 +0200 @@ -0,0 +1,73 @@ +/* + * strstr.c -- + * + * Source code for the "strstr" library routine. + * + * Copyright (c) 1988-1993 The Regents of the University of California. + * Copyright (c) 1994 Sun Microsystems, Inc. + * + * See the file "license.terms" for information on usage and redistribution + * of this file, and for a DISCLAIMER OF ALL WARRANTIES. + * + * RCS: @(#) $Id: strstr.c,v 1.3.2.1 2005/04/12 18:28:56 kennykb Exp $ + */ + +#include "tcl.h" +#ifndef NULL +#define NULL 0 +#endif + +/* + *---------------------------------------------------------------------- + * + * strstr -- + * + * Locate the first instance of a substring in a string. + * + * Results: + * If string contains substring, the return value is the + * location of the first matching instance of substring + * in string. If string doesn't contain substring, the + * return value is 0. Matching is done on an exact + * character-for-character basis with no wildcards or special + * characters. + * + * Side effects: + * None. + * + *---------------------------------------------------------------------- + */ + +char * +strstr(string, substring) + register char *string; /* String to search. */ + char *substring; /* Substring to try to find in string. */ +{ + register char *a, *b; + + /* First scan quickly through the two strings looking for a + * single-character match. When it's found, then compare the + * rest of the substring. + */ + + b = substring; + if (*b == 0) { + return string; + } + for ( ; *string != 0; string += 1) { + if (*string != *b) { + continue; + } + a = string; + while (1) { + if (*b == 0) { + return string; + } + if (*a++ != *b++) { + break; + } + } + b = substring; + } + return NULL; +}