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Annotation of embedaddon/lrzsz/lib/strstr.c, revision 1.1

1.1     ! misho       1: /* strstr.c -- return the offset of one string within another
        !             2:    Copyright (C) 1989, 1990 Free Software Foundation, Inc.
        !             3: 
        !             4:    This program is free software; you can redistribute it and/or modify
        !             5:    it under the terms of the GNU General Public License as published by
        !             6:    the Free Software Foundation; either version 2, or (at your option)
        !             7:    any later version.
        !             8: 
        !             9:    This program is distributed in the hope that it will be useful,
        !            10:    but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            11:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            12:    GNU General Public License for more details.
        !            13: 
        !            14:    You should have received a copy of the GNU General Public License
        !            15:    along with this program; if not, write to the Free Software
        !            16:    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !            17: 
        !            18: /* Written by Mike Rendell <michael@cs.mun.ca>.  */
        !            19: 
        !            20: /* Return the starting address of string S2 in S1;
        !            21:    return 0 if it is not found. */
        !            22: 
        !            23: char *
        !            24: strstr (s1, s2)
        !            25:      char *s1;
        !            26:      char *s2;
        !            27: {
        !            28:   int i;
        !            29:   char *p1;
        !            30:   char *p2;
        !            31:   char *s = s1;
        !            32: 
        !            33:   for (p2 = s2, i = 0; *s; p2 = s2, i++, s++)
        !            34:     {
        !            35:       for (p1 = s; *p1 && *p2 && *p1 == *p2; p1++, p2++)
        !            36:        ;
        !            37:       if (!*p2)
        !            38:        break;
        !            39:     }
        !            40:   if (!*p2)
        !            41:     return s1 + i;
        !            42: 
        !            43:   return 0;
        !            44: }