1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2007 AT&T Knowledge Ventures * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Knowledge Ventures * 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 #include <ast.h> 25 26 #if _lib_strncasecmp 27 28 NoN(strncasecmp) 29 30 #else 31 32 #include <ctype.h> 33 34 #undef strncasecmp 35 36 int 37 strncasecmp(register const char* a, register const char* b, size_t n) 38 { 39 register const char* e; 40 register int ac; 41 register int bc; 42 register int d; 43 44 e = a + n; 45 for (;;) 46 { 47 if (a >= e) 48 return 0; 49 ac = *a++; 50 if (isupper(ac)) 51 ac = tolower(ac); 52 bc = *b++; 53 if (isupper(bc)) 54 bc = tolower(bc); 55 if (d = ac - bc) 56 return d; 57 if (!ac) 58 return 0; 59 } 60 } 61 62 #endif 63