1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2009 AT&T Intellectual Property * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Intellectual Property * 8 * * 9 * A copy of the License is available at * 10 * http://www.opensource.org/licenses/cpl1.0.txt * 11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12 * * 13 * Information and Software Systems Research * 14 * AT&T Research * 15 * Florham Park NJ * 16 * * 17 * Glenn Fowler <gsf@research.att.com> * 18 * David Korn <dgk@research.att.com> * 19 * Phong Vo <kpv@research.att.com> * 20 * * 21 ***********************************************************************/ 22 #pragma prototyped 23 24 #if defined(__STDPP__directive) && defined(__STDPP__hide) 25 __STDPP__directive pragma pp:hide strstr 26 #else 27 #define strstr ______strstr 28 #endif 29 30 #include <ast.h> 31 32 #if defined(__STDPP__directive) && defined(__STDPP__hide) 33 __STDPP__directive pragma pp:nohide strstr 34 #else 35 #undef strstr 36 #endif 37 38 #if _lib_strstr 39 40 NoN(strstr) 41 42 #else 43 44 #if defined(__EXPORT__) 45 #define extern __EXPORT__ 46 #endif 47 48 extern char* 49 strstr(register const char* s1, register const char* s2) 50 { 51 register int c1; 52 register int c2; 53 register const char* t1; 54 register const char* t2; 55 56 if (s2) 57 { 58 if (!*s2) 59 return (char*)s1; 60 c2 = *s2++; 61 while (c1 = *s1++) 62 if (c1 == c2) 63 { 64 t1 = s1; 65 t2 = s2; 66 do 67 { 68 if (!*t2) 69 return (char*)s1 - 1; 70 } while (*t1++ == *t2++); 71 } 72 } 73 return 0; 74 } 75 76 #endif 77