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 #include <ast.h> 25 #include <ctype.h> 26 27 /* 28 * version strcmp(3) 29 */ 30 31 int 32 strvcmp(register const char* a, register const char* b) 33 { 34 register unsigned long na; 35 register unsigned long nb; 36 37 for (;;) 38 { 39 if (isdigit(*a) && isdigit(*b)) 40 { 41 na = nb = 0; 42 while (isdigit(*a)) 43 na = na * 10 + *a++ - '0'; 44 while (isdigit(*b)) 45 nb = nb * 10 + *b++ - '0'; 46 if (na < nb) 47 return -1; 48 if (na > nb) 49 return 1; 50 } 51 else if (*a != *b) 52 break; 53 else if (!*a) 54 return 0; 55 else 56 { 57 a++; 58 b++; 59 } 60 } 61 if (*a == 0) 62 return -1; 63 if (*b == 0) 64 return 1; 65 if (*a == '.') 66 return -1; 67 if (*b == '.') 68 return 1; 69 if (*a == '-') 70 return -1; 71 if (*b == '-') 72 return 1; 73 return *a < *b ? -1 : 1; 74 } 75