55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
/*-------------------------------------------------------------------------
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_strstr.c - part of string library functions
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Written By - Sandeep Dutta . sandeep.dutta@usa.net (1999)
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This library is free software; you can redistribute it and/or modify it
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under the terms of the GNU Library General Public License as published by the
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Free Software Foundation; either version 2, or (at your option) any
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later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this program; if not, write to the Free Software
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Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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In other words, you are welcome to use, share and improve this program.
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You are forbidden to forbid anyone else to use, share and improve
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what you give them. Help stamp out software-hoarding!
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-------------------------------------------------------------------------*/
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#include "string.h"
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#define NULL (void *)0
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char * strstr (
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char * str1,
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char * str2
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)
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{
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char * cp = str1;
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char * s1;
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char * s2;
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if ( !*str2 )
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return str1;
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while (*cp)
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{
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s1 = cp;
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s2 = str2;
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while ( *s1 && *s2 && !(*s1-*s2) )
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s1++, s2++;
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if (!*s2)
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return(cp);
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cp++;
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}
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return (NULL) ;
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}
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