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
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
|
/*=============================================================================
Copyright (c) 2013 Daniel James
Use, modification and distribution is subject to the Boost Software
License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
http://www.boost.org/LICENSE_1_0.txt)
=============================================================================*/
#include "glob.hpp"
#include <cassert>
namespace quickbook
{
typedef quickbook::string_view::const_iterator glob_iterator;
void check_glob_range(glob_iterator&, glob_iterator);
void check_glob_escape(glob_iterator&, glob_iterator);
bool match_section(glob_iterator& pattern_begin, glob_iterator pattern_end,
glob_iterator& filename_begin, glob_iterator& filename_end);
bool match_range(glob_iterator& pattern_begin, glob_iterator pattern_end,
unsigned char x);
bool check_glob(quickbook::string_view pattern)
{
bool is_glob = false;
bool is_ascii = true;
glob_iterator begin = pattern.begin();
glob_iterator end = pattern.end();
while (begin != end) {
if (*begin < 32 || *begin > 127)
is_ascii = false;
switch(*begin) {
case '\\':
check_glob_escape(begin, end);
break;
case '[':
check_glob_range(begin, end);
is_glob = true;
break;
case ']':
throw glob_error("uneven square brackets");
case '?':
is_glob = true;
++begin;
break;
case '*':
is_glob = true;
++begin;
if (begin != end && *begin == '*') {
throw glob_error("'**' not supported");
}
break;
default:
++begin;
}
}
if (is_glob && !is_ascii)
throw glob_error("invalid character, globs are ascii only");
return is_glob;
}
void check_glob_range(glob_iterator& begin, glob_iterator end)
{
assert(begin != end && *begin == '[');
++begin;
if (*begin == ']')
throw glob_error("empty range");
while (begin != end) {
switch (*begin) {
case '\\':
++begin;
if (begin == end) {
throw glob_error("trailing escape");
}
else if (*begin == '\\' || *begin == '/') {
throw glob_error("contains escaped slash");
}
++begin;
break;
case '[':
// TODO: Allow?
throw glob_error("nested square brackets");
case ']':
++begin;
return;
case '/':
throw glob_error("slash in square brackets");
default:
++begin;
}
}
throw glob_error("uneven square brackets");
}
void check_glob_escape(glob_iterator& begin, glob_iterator end)
{
assert(begin != end && *begin == '\\');
++begin;
if (begin == end) {
throw glob_error("trailing escape");
}
else if (*begin == '\\' || *begin == '/') {
throw glob_error("contains escaped slash");
}
++begin;
}
bool glob(quickbook::string_view const& pattern,
quickbook::string_view const& filename)
{
// If there wasn't this special case then '*' would match an
// empty string.
if (filename.empty()) return pattern.empty();
glob_iterator pattern_it = pattern.begin();
glob_iterator pattern_end = pattern.end();
glob_iterator filename_it = filename.begin();
glob_iterator filename_end = filename.end();
if (!match_section(pattern_it, pattern_end, filename_it, filename_end))
return false;
while (pattern_it != pattern_end) {
assert(*pattern_it == '*');
++pattern_it;
if (pattern_it == pattern_end) return true;
// TODO: Error?
if (*pattern_it == '*') return false;
while (true) {
if (filename_it == filename_end) return false;
if (match_section(pattern_it, pattern_end, filename_it, filename_end))
break;
++filename_it;
}
}
return filename_it == filename_end;
}
bool match_section(glob_iterator& pattern_begin, glob_iterator pattern_end,
glob_iterator& filename_begin, glob_iterator& filename_end)
{
glob_iterator pattern_it = pattern_begin;
glob_iterator filename_it = filename_begin;
while (pattern_it != pattern_end && *pattern_it != '*') {
if (filename_it == filename_end) return false;
switch(*pattern_it) {
case '*':
assert(false);
return false;
case '[':
if (!match_range(pattern_it, pattern_end, *filename_it))
return false;
++filename_it;
break;
case '?':
++pattern_it;
++filename_it;
break;
case '\\':
++pattern_it;
if (pattern_it == pattern_end) return false;
BOOST_FALLTHROUGH;
default:
if (*pattern_it != *filename_it) return false;
++pattern_it;
++filename_it;
}
}
if (pattern_it == pattern_end && filename_it != filename_end)
return false;
pattern_begin = pattern_it;
filename_begin = filename_it;
return true;
}
bool match_range(glob_iterator& pattern_begin, glob_iterator pattern_end,
unsigned char x)
{
assert(pattern_begin != pattern_end && *pattern_begin == '[');
++pattern_begin;
if (pattern_begin == pattern_end) return false;
bool invert_match = false;
bool matched = false;
if (*pattern_begin == '^') {
invert_match = true;
++pattern_begin;
if (pattern_begin == pattern_end) return false;
}
// Search for a match
while (true) {
unsigned char first = *pattern_begin;
++pattern_begin;
if (first == ']') break;
if (pattern_begin == pattern_end) return false;
if (first == '\\') {
first = *pattern_begin;
++pattern_begin;
if (pattern_begin == pattern_end) return false;
}
if (*pattern_begin != '-') {
matched = matched || (first == x);
}
else {
++pattern_begin;
if (pattern_begin == pattern_end) return false;
unsigned char second = *pattern_begin;
++pattern_begin;
if (second == ']') {
matched = matched || (first == x) || (x == '-');
break;
}
if (pattern_begin == pattern_end) return false;
if (second == '\\') {
second = *pattern_begin;
++pattern_begin;
if (pattern_begin == pattern_end) return false;
}
// TODO: What if second < first?
matched = matched || (first <= x && x <= second);
}
}
return invert_match != matched;
}
std::size_t find_glob_char(quickbook::string_view pattern,
std::size_t pos)
{
// Weird style is because quickbook::string_view's find_first_of
// doesn't take a position argument.
std::size_t removed = 0;
while (true) {
pos = pattern.find_first_of("[]?*\\");
if (pos == quickbook::string_view::npos) return pos;
if (pattern[pos] != '\\') return pos + removed;
pattern.remove_prefix(pos + 2);
removed += pos + 2;
}
}
std::string glob_unescape(quickbook::string_view pattern)
{
std::string result;
while (true) {
std::size_t pos = pattern.find("\\");
if (pos == quickbook::string_view::npos) {
result.append(pattern.data(), pattern.size());
break;
}
result.append(pattern.data(), pos);
++pos;
if (pos < pattern.size()) {
result += pattern[pos];
++pos;
}
pattern.remove_prefix(pos);
}
return result;
}
}
|
