1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
/* File name comparison routine.
Copyright (C) 2007 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include "filenames.h"
#include "safe-ctype.h"
/*
@deftypefn Extension int filename_cmp (const char *@var{s1}, const char *@var{s2})
Return zero if the two file names @var{s1} and @var{s2} are equivalent.
If not equivalent, the returned value is similar to what @code{strcmp}
would return. In other words, it returns a negative value if @var{s1}
is less than @var{s2}, or a positive value if @var{s2} is greater than
@var{s2}.
This function does not normalize file names. As a result, this function
will treat filenames that are spelled differently as different even in
the case when the two filenames point to the same underlying file.
However, it does handle the fact that on DOS-like file systems, forward
and backward slashes are equal.
@end deftypefn
*/
int
filename_cmp (const char *s1, const char *s2)
{
#if !defined(HAVE_DOS_BASED_FILE_SYSTEM) \
&& !defined(HAVE_CASE_INSENSITIVE_FILE_SYSTEM)
return strcmp(s1, s2);
#else
for (;;)
{
int c1 = *s1;
int c2 = *s2;
#if defined (HAVE_CASE_INSENSITIVE_FILE_SYSTEM)
c1 = TOLOWER (c1);
c2 = TOLOWER (c2);
#endif
#if defined (HAVE_DOS_BASED_FILE_SYSTEM)
/* On DOS-based file systems, the '/' and the '\' are equivalent. */
if (c1 == '/')
c1 = '\\';
if (c2 == '/')
c2 = '\\';
#endif
if (c1 != c2)
return (c1 - c2);
if (c1 == '\0')
return 0;
s1++;
s2++;
}
#endif
}
/*
@deftypefn Extension int filename_ncmp (const char *@var{s1}, const char *@var{s2}, size_t @var{n})
Return zero if the two file names @var{s1} and @var{s2} are equivalent
in range @var{n}.
If not equivalent, the returned value is similar to what @code{strncmp}
would return. In other words, it returns a negative value if @var{s1}
is less than @var{s2}, or a positive value if @var{s2} is greater than
@var{s2}.
This function does not normalize file names. As a result, this function
will treat filenames that are spelled differently as different even in
the case when the two filenames point to the same underlying file.
However, it does handle the fact that on DOS-like file systems, forward
and backward slashes are equal.
@end deftypefn
*/
int
filename_ncmp (const char *s1, const char *s2, size_t n)
{
#if !defined(HAVE_DOS_BASED_FILE_SYSTEM) \
&& !defined(HAVE_CASE_INSENSITIVE_FILE_SYSTEM)
return strncmp(s1, s2, n);
#else
if (!n)
return 0;
for (; n > 0; --n)
{
int c1 = *s1;
int c2 = *s2;
#if defined (HAVE_CASE_INSENSITIVE_FILE_SYSTEM)
c1 = TOLOWER (c1);
c2 = TOLOWER (c2);
#endif
#if defined (HAVE_DOS_BASED_FILE_SYSTEM)
/* On DOS-based file systems, the '/' and the '\' are equivalent. */
if (c1 == '/')
c1 = '\\';
if (c2 == '/')
c2 = '\\';
#endif
if (c1 == '\0' || c1 != c2)
return (c1 - c2);
s1++;
s2++;
}
return 0;
#endif
}
/*
@deftypefn Extension hashval_t filename_hash (const void *@var{s})
Return the hash value for file name @var{s} that will be compared
using filename_cmp.
This function is for use with hashtab.c hash tables.
@end deftypefn
*/
hashval_t
filename_hash (const void *s)
{
/* The cast is for -Wc++-compat. */
const unsigned char *str = (const unsigned char *) s;
hashval_t r = 0;
unsigned char c;
while ((c = *str++) != 0)
{
if (c == '\\')
c = '/';
c = TOLOWER (c);
r = r * 67 + c - 113;
}
return r;
}
/*
@deftypefn Extension int filename_eq (const void *@var{s1}, const void *@var{s2})
Return non-zero if file names @var{s1} and @var{s2} are equivalent.
This function is for use with hashtab.c hash tables.
@end deftypefn
*/
int
filename_eq (const void *s1, const void *s2)
{
/* The casts are for -Wc++-compat. */
return filename_cmp ((const char *) s1, (const char *) s2) == 0;
}
|
