1 /* fncase.c -- CVS support for case insensitive file systems. 2 Jim Blandy <jimb@cyclic.com> 3 4 This file is part of GNU CVS. 5 6 GNU CVS is free software; you can redistribute it and/or modify it 7 under the terms of the GNU General Public License as published by the 8 Free Software Foundation; either version 2, or (at your option) any 9 later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. */ 15 16 #ifdef HAVE_CONFIG_H 17 #include "config.h" 18 #endif 19 20 #include "system.h" 21 22 /* The equivalence class mapping for filenames. 23 Windows NT filenames are case-insensitive, but case-preserving. 24 Both / and \ are path element separators. 25 Thus, this table maps both upper and lower case to lower case, and 26 both / and \ to /. */ 27 28 #if 0 29 main () 30 { 31 int c; 32 33 for (c = 0; c < 256; c++) 34 { 35 int t; 36 37 if (c == '\\') 38 t = '/'; 39 else 40 t = tolower (c); 41 42 if ((c & 0x7) == 0x0) 43 printf (" "); 44 printf ("0x%02x,", t); 45 if ((c & 0x7) == 0x7) 46 putchar ('\n'); 47 else if ((c & 0x7) == 0x3) 48 putchar (' '); 49 } 50 } 51 #endif 52 53 unsigned char 54 WNT_filename_classes[] = 55 { 56 0x00,0x01,0x02,0x03, 0x04,0x05,0x06,0x07, 57 0x08,0x09,0x0a,0x0b, 0x0c,0x0d,0x0e,0x0f, 58 0x10,0x11,0x12,0x13, 0x14,0x15,0x16,0x17, 59 0x18,0x19,0x1a,0x1b, 0x1c,0x1d,0x1e,0x1f, 60 0x20,0x21,0x22,0x23, 0x24,0x25,0x26,0x27, 61 0x28,0x29,0x2a,0x2b, 0x2c,0x2d,0x2e,0x2f, 62 0x30,0x31,0x32,0x33, 0x34,0x35,0x36,0x37, 63 0x38,0x39,0x3a,0x3b, 0x3c,0x3d,0x3e,0x3f, 64 0x40,0x61,0x62,0x63, 0x64,0x65,0x66,0x67, 65 0x68,0x69,0x6a,0x6b, 0x6c,0x6d,0x6e,0x6f, 66 0x70,0x71,0x72,0x73, 0x74,0x75,0x76,0x77, 67 0x78,0x79,0x7a,0x5b, 0x2f,0x5d,0x5e,0x5f, 68 0x60,0x61,0x62,0x63, 0x64,0x65,0x66,0x67, 69 0x68,0x69,0x6a,0x6b, 0x6c,0x6d,0x6e,0x6f, 70 0x70,0x71,0x72,0x73, 0x74,0x75,0x76,0x77, 71 0x78,0x79,0x7a,0x7b, 0x7c,0x7d,0x7e,0x7f, 72 0x80,0x81,0x82,0x83, 0x84,0x85,0x86,0x87, 73 0x88,0x89,0x8a,0x8b, 0x8c,0x8d,0x8e,0x8f, 74 0x90,0x91,0x92,0x93, 0x94,0x95,0x96,0x97, 75 0x98,0x99,0x9a,0x9b, 0x9c,0x9d,0x9e,0x9f, 76 0xa0,0xa1,0xa2,0xa3, 0xa4,0xa5,0xa6,0xa7, 77 0xa8,0xa9,0xaa,0xab, 0xac,0xad,0xae,0xaf, 78 0xb0,0xb1,0xb2,0xb3, 0xb4,0xb5,0xb6,0xb7, 79 0xb8,0xb9,0xba,0xbb, 0xbc,0xbd,0xbe,0xbf, 80 0xc0,0xc1,0xc2,0xc3, 0xc4,0xc5,0xc6,0xc7, 81 0xc8,0xc9,0xca,0xcb, 0xcc,0xcd,0xce,0xcf, 82 0xd0,0xd1,0xd2,0xd3, 0xd4,0xd5,0xd6,0xd7, 83 0xd8,0xd9,0xda,0xdb, 0xdc,0xdd,0xde,0xdf, 84 0xe0,0xe1,0xe2,0xe3, 0xe4,0xe5,0xe6,0xe7, 85 0xe8,0xe9,0xea,0xeb, 0xec,0xed,0xee,0xef, 86 0xf0,0xf1,0xf2,0xf3, 0xf4,0xf5,0xf6,0xf7, 87 0xf8,0xf9,0xfa,0xfb, 0xfc,0xfd,0xfe,0xff, 88 }; 89 90 /* Like strcmp, but with the appropriate tweaks for file names. 91 Under Windows NT, filenames are case-insensitive but case-preserving, 92 and both \ and / are path element separators. */ 93 int 94 fncmp (const char *n1, const char *n2) 95 { 96 while (*n1 && *n2 97 && (WNT_filename_classes[(unsigned char) *n1] 98 == WNT_filename_classes[(unsigned char) *n2])) 99 n1++, n2++; 100 return (WNT_filename_classes[(unsigned char) *n1] 101 - WNT_filename_classes[(unsigned char) *n2]); 102 } 103 104 /* Fold characters in FILENAME to their canonical forms. 105 If FOLD_FN_CHAR is not #defined, the system provides a default 106 definition for this. */ 107 void 108 fnfold (char *filename) 109 { 110 while (*filename) 111 { 112 *filename = FOLD_FN_CHAR (*filename); 113 filename++; 114 } 115 } 116