1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/persistentdata/persistentstorage/sqlite3api/TEST/TCL/tcldistribution/compat/strstr.c	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,73 @@
     1.4 +/* 
     1.5 + * strstr.c --
     1.6 + *
     1.7 + *	Source code for the "strstr" library routine.
     1.8 + *
     1.9 + * Copyright (c) 1988-1993 The Regents of the University of California.
    1.10 + * Copyright (c) 1994 Sun Microsystems, Inc.
    1.11 + *
    1.12 + * See the file "license.terms" for information on usage and redistribution
    1.13 + * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
    1.14 + *
    1.15 + * RCS: @(#) $Id: strstr.c,v 1.3.2.1 2005/04/12 18:28:56 kennykb Exp $
    1.16 + */
    1.17 +
    1.18 +#include "tcl.h"
    1.19 +#ifndef NULL
    1.20 +#define NULL 0
    1.21 +#endif
    1.22 +
    1.23 +/*
    1.24 + *----------------------------------------------------------------------
    1.25 + *
    1.26 + * strstr --
    1.27 + *
    1.28 + *	Locate the first instance of a substring in a string.
    1.29 + *
    1.30 + * Results:
    1.31 + *	If string contains substring, the return value is the
    1.32 + *	location of the first matching instance of substring
    1.33 + *	in string.  If string doesn't contain substring, the
    1.34 + *	return value is 0.  Matching is done on an exact
    1.35 + *	character-for-character basis with no wildcards or special
    1.36 + *	characters.
    1.37 + *
    1.38 + * Side effects:
    1.39 + *	None.
    1.40 + *
    1.41 + *----------------------------------------------------------------------
    1.42 + */
    1.43 +
    1.44 +char *
    1.45 +strstr(string, substring)
    1.46 +    register char *string;	/* String to search. */
    1.47 +    char *substring;		/* Substring to try to find in string. */
    1.48 +{
    1.49 +    register char *a, *b;
    1.50 +
    1.51 +    /* First scan quickly through the two strings looking for a
    1.52 +     * single-character match.  When it's found, then compare the
    1.53 +     * rest of the substring.
    1.54 +     */
    1.55 +
    1.56 +    b = substring;
    1.57 +    if (*b == 0) {
    1.58 +	return string;
    1.59 +    }
    1.60 +    for ( ; *string != 0; string += 1) {
    1.61 +	if (*string != *b) {
    1.62 +	    continue;
    1.63 +	}
    1.64 +	a = string;
    1.65 +	while (1) {
    1.66 +	    if (*b == 0) {
    1.67 +		return string;
    1.68 +	    }
    1.69 +	    if (*a++ != *b++) {
    1.70 +		break;
    1.71 +	    }
    1.72 +	}
    1.73 +	b = substring;
    1.74 +    }
    1.75 +    return NULL;
    1.76 +}