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Annotation of embedaddon/lrzsz/lib/strstr.c, revision 1.1.1.1

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: }