1/* 2 * Copyright (c) 2004-2005 Todd C. Miller <Todd.Miller@courtesan.com> 3 * 4 * Permission to use, copy, modify, and distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17#include <config.h> 18 19#include <sys/types.h> 20 21#include "missing.h" 22 23/* 24 * Case insensitive string compare routines, same semantics as str[n]cmp() 25 * (assumes ASCII..). 26 * Derived from a public domain implementation included with the pdksh shell. 27 */ 28static const char ichars[256] = { 29 0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 30 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf, 31 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 32 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 33 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 34 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 35 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 36 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 37 0x40, 'a', 'b', 'c', 'd', 'e', 'f', 'g', 38 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 39 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 40 'x', 'y', 'z', 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, 41 0x60, 'a', 'b', 'c', 'd', 'e', 'f', 'g', 42 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 43 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 44 'x', 'y', 'z', 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 45 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 46 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 47 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 48 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 49 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 50 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 51 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 52 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 53 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 54 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, 55 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 56 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, 57 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 58 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, 59 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 60 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff 61}; 62 63int 64strcasecmp(s1, s2) 65 const char *s1; 66 const char *s2; 67{ 68 const unsigned char *us1 = (const unsigned char *) s1; 69 const unsigned char *us2 = (const unsigned char *) s2; 70 71 while (ichars[*us1] == ichars[*us2++]) { 72 if (*us1++ == '\0') 73 return 0; 74 } 75 return ichars[*us1] - ichars[*--us2]; 76} 77 78int 79strncasecmp(s1, s2, n) 80 const char *s1; 81 const char *s2; 82 size_t n; 83{ 84 const unsigned char *us1 = (const unsigned char *) s1; 85 const unsigned char *us2 = (const unsigned char *) s2; 86 87 while (n != 0 && ichars[*us1] == ichars[*us2++]) { 88 if (*us1++ == '\0') 89 return 0; 90 n--; 91 } 92 return n ? ichars[*us1] - ichars[*--us2] : 0; 93} 94