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 #include <sys/cdefs.h>
16 __RCSID("$NetBSD: fncase.c,v 1.2 2016/05/17 14:00:09 christos Exp $");
17
18 #ifdef HAVE_CONFIG_H
19 #include "config.h"
20 #endif
21
22 #include "system.h"
23
24 /* The equivalence class mapping for filenames.
25 Windows NT filenames are case-insensitive, but case-preserving.
26 Both / and \ are path element separators.
27 Thus, this table maps both upper and lower case to lower case, and
28 both / and \ to /. */
29
30 #if 0
31 main ()
32 {
33 int c;
34
35 for (c = 0; c < 256; c++)
36 {
37 int t;
38
39 if (c == '\\')
40 t = '/';
41 else
42 t = tolower (c);
43
44 if ((c & 0x7) == 0x0)
45 printf (" ");
46 printf ("0x%02x,", t);
47 if ((c & 0x7) == 0x7)
48 putchar ('\n');
49 else if ((c & 0x7) == 0x3)
50 putchar (' ');
51 }
52 }
53 #endif
54
55 /* Under Windows NT, filenames are case-insensitive but case-preserving,
56 and both \ and / are path element separators. */
57 unsigned char
58 WNT_filename_classes[] =
59 {
60 0x00,0x01,0x02,0x03, 0x04,0x05,0x06,0x07,
61 0x08,0x09,0x0a,0x0b, 0x0c,0x0d,0x0e,0x0f,
62 0x10,0x11,0x12,0x13, 0x14,0x15,0x16,0x17,
63 0x18,0x19,0x1a,0x1b, 0x1c,0x1d,0x1e,0x1f,
64 0x20,0x21,0x22,0x23, 0x24,0x25,0x26,0x27,
65 0x28,0x29,0x2a,0x2b, 0x2c,0x2d,0x2e,0x2f,
66 0x30,0x31,0x32,0x33, 0x34,0x35,0x36,0x37,
67 0x38,0x39,0x3a,0x3b, 0x3c,0x3d,0x3e,0x3f,
68 0x40,0x61,0x62,0x63, 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,0x5b, 0x2f,0x5d,0x5e,0x5f,
72 0x60,0x61,0x62,0x63, 0x64,0x65,0x66,0x67,
73 0x68,0x69,0x6a,0x6b, 0x6c,0x6d,0x6e,0x6f,
74 0x70,0x71,0x72,0x73, 0x74,0x75,0x76,0x77,
75 0x78,0x79,0x7a,0x7b, 0x7c,0x7d,0x7e,0x7f,
76 0x80,0x81,0x82,0x83, 0x84,0x85,0x86,0x87,
77 0x88,0x89,0x8a,0x8b, 0x8c,0x8d,0x8e,0x8f,
78 0x90,0x91,0x92,0x93, 0x94,0x95,0x96,0x97,
79 0x98,0x99,0x9a,0x9b, 0x9c,0x9d,0x9e,0x9f,
80 0xa0,0xa1,0xa2,0xa3, 0xa4,0xa5,0xa6,0xa7,
81 0xa8,0xa9,0xaa,0xab, 0xac,0xad,0xae,0xaf,
82 0xb0,0xb1,0xb2,0xb3, 0xb4,0xb5,0xb6,0xb7,
83 0xb8,0xb9,0xba,0xbb, 0xbc,0xbd,0xbe,0xbf,
84 0xc0,0xc1,0xc2,0xc3, 0xc4,0xc5,0xc6,0xc7,
85 0xc8,0xc9,0xca,0xcb, 0xcc,0xcd,0xce,0xcf,
86 0xd0,0xd1,0xd2,0xd3, 0xd4,0xd5,0xd6,0xd7,
87 0xd8,0xd9,0xda,0xdb, 0xdc,0xdd,0xde,0xdf,
88 0xe0,0xe1,0xe2,0xe3, 0xe4,0xe5,0xe6,0xe7,
89 0xe8,0xe9,0xea,0xeb, 0xec,0xed,0xee,0xef,
90 0xf0,0xf1,0xf2,0xf3, 0xf4,0xf5,0xf6,0xf7,
91 0xf8,0xf9,0xfa,0xfb, 0xfc,0xfd,0xfe,0xff,
92 };
93
94 /* Same as WNT_filename_classes, but do not fold `\' into `/'. */
95 unsigned char
96 OSX_filename_classes[] =
97 {
98 0x00,0x01,0x02,0x03, 0x04,0x05,0x06,0x07,
99 0x08,0x09,0x0a,0x0b, 0x0c,0x0d,0x0e,0x0f,
100 0x10,0x11,0x12,0x13, 0x14,0x15,0x16,0x17,
101 0x18,0x19,0x1a,0x1b, 0x1c,0x1d,0x1e,0x1f,
102 0x20,0x21,0x22,0x23, 0x24,0x25,0x26,0x27,
103 0x28,0x29,0x2a,0x2b, 0x2c,0x2d,0x2e,0x2f,
104 0x30,0x31,0x32,0x33, 0x34,0x35,0x36,0x37,
105 0x38,0x39,0x3a,0x3b, 0x3c,0x3d,0x3e,0x3f,
106 0x40,0x61,0x62,0x63, 0x64,0x65,0x66,0x67,
107 0x68,0x69,0x6a,0x6b, 0x6c,0x6d,0x6e,0x6f,
108 0x70,0x71,0x72,0x73, 0x74,0x75,0x76,0x77,
109 0x78,0x79,0x7a,0x5b, 0x5c,0x5d,0x5e,0x5f,
110 0x60,0x61,0x62,0x63, 0x64,0x65,0x66,0x67,
111 0x68,0x69,0x6a,0x6b, 0x6c,0x6d,0x6e,0x6f,
112 0x70,0x71,0x72,0x73, 0x74,0x75,0x76,0x77,
113 0x78,0x79,0x7a,0x7b, 0x7c,0x7d,0x7e,0x7f,
114 0x80,0x81,0x82,0x83, 0x84,0x85,0x86,0x87,
115 0x88,0x89,0x8a,0x8b, 0x8c,0x8d,0x8e,0x8f,
116 0x90,0x91,0x92,0x93, 0x94,0x95,0x96,0x97,
117 0x98,0x99,0x9a,0x9b, 0x9c,0x9d,0x9e,0x9f,
118 0xa0,0xa1,0xa2,0xa3, 0xa4,0xa5,0xa6,0xa7,
119 0xa8,0xa9,0xaa,0xab, 0xac,0xad,0xae,0xaf,
120 0xb0,0xb1,0xb2,0xb3, 0xb4,0xb5,0xb6,0xb7,
121 0xb8,0xb9,0xba,0xbb, 0xbc,0xbd,0xbe,0xbf,
122 0xc0,0xc1,0xc2,0xc3, 0xc4,0xc5,0xc6,0xc7,
123 0xc8,0xc9,0xca,0xcb, 0xcc,0xcd,0xce,0xcf,
124 0xd0,0xd1,0xd2,0xd3, 0xd4,0xd5,0xd6,0xd7,
125 0xd8,0xd9,0xda,0xdb, 0xdc,0xdd,0xde,0xdf,
126 0xe0,0xe1,0xe2,0xe3, 0xe4,0xe5,0xe6,0xe7,
127 0xe8,0xe9,0xea,0xeb, 0xec,0xed,0xee,0xef,
128 0xf0,0xf1,0xf2,0xf3, 0xf4,0xf5,0xf6,0xf7,
129 0xf8,0xf9,0xfa,0xfb, 0xfc,0xfd,0xfe,0xff,
130 };
131
132 /* Like strcmp, but with the appropriate tweaks for file names.
133 Under Windows NT, filenames are case-insensitive but case-preserving,
134 and both \ and / are path element separators. Under Mac OS X, filenames
135 are case-insensitive but case-preserving. */
136 int
fncmp(const char * n1,const char * n2)137 fncmp (const char *n1, const char *n2)
138 {
139 while (*n1 && *n2
140 && (FOLD_FN_CHAR(*n1)
141 == FOLD_FN_CHAR(*n2)))
142 n1++, n2++;
143 return (FOLD_FN_CHAR(*n1) - FOLD_FN_CHAR(*n2));
144 }
145
146 /* Fold characters in FILENAME to their canonical forms.
147 If FOLD_FN_CHAR is not #defined, the system provides a default
148 definition for this. */
149 void
fnfold(char * filename)150 fnfold (char *filename)
151 {
152 while (*filename)
153 {
154 *filename = FOLD_FN_CHAR (*filename);
155 filename++;
156 }
157 }
158