1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2010 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 /* 25 * ccmapc(c, CC_NATIVE, CC_ASCII) and strncmp 26 */ 27 28 #include <ast.h> 29 #include <ccode.h> 30 31 #if _lib_strnacmp 32 33 NoN(strnacmp) 34 35 #else 36 37 #include <ctype.h> 38 39 int 40 strnacmp(const char* a, const char* b, size_t n) 41 { 42 #if CC_NATIVE == CC_ASCII 43 return strncmp(a, b, n); 44 #else 45 register unsigned char* ua = (unsigned char*)a; 46 register unsigned char* ub = (unsigned char*)b; 47 register unsigned char* ue; 48 register unsigned char* m; 49 register int c; 50 register int d; 51 52 m = ccmap(CC_NATIVE, CC_ASCII); 53 ue = ua + n; 54 while (ua < ue) 55 { 56 c = m[*ua++]; 57 if (d = c - m[*ub++]) 58 return d; 59 if (!c) 60 return 0; 61 } 62 return 0; 63 #endif 64 } 65 66 #endif 67