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
|
/*
* blogc: A blog compiler.
* Copyright (C) 2015 Rafael G. Martins <rafael@rafaelmartins.eng.br>
*
* This program can be distributed under the terms of the BSD License.
* See the file LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /* HAVE_CONFIG_H */
#include <stdbool.h>
#include <string.h>
#include "utils/utils.h"
#include "content-parser.h"
#include "source-parser.h"
#include "error.h"
typedef enum {
SOURCE_START = 1,
SOURCE_CONFIG_KEY,
SOURCE_CONFIG_VALUE_START,
SOURCE_CONFIG_VALUE,
SOURCE_SEPARATOR,
SOURCE_CONTENT_START,
SOURCE_CONTENT,
SOURCE_EXCERPT_SEPARATOR,
SOURCE_CONTENT2_START,
SOURCE_CONTENT2,
} blogc_source_parser_state_t;
b_trie_t*
blogc_source_parse(const char *src, size_t src_len, blogc_error_t **err)
{
if (err == NULL || *err != NULL)
return NULL;
size_t current = 0;
size_t start = 0;
char *key = NULL;
char *tmp = NULL;
char *tmp2 = NULL;
b_trie_t *rv = b_trie_new(free);
blogc_source_parser_state_t state = SOURCE_START;
while (current < src_len) {
char c = src[current];
switch (state) {
case SOURCE_START:
if (c == ' ' || c == '\t' || c == '\n' || c == '\r')
break;
if (c >= 'A' && c <= 'Z') {
state = SOURCE_CONFIG_KEY;
start = current;
break;
}
if (c == '-') {
state = SOURCE_SEPARATOR;
break;
}
*err = blogc_error_parser(BLOGC_ERROR_SOURCE_PARSER, src, src_len,
current,
"Can't find a configuration key or the content separator.");
break;
case SOURCE_CONFIG_KEY:
if ((c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9') || c == '_')
break;
if (c == ':') {
key = b_strndup(src + start, current - start);
if (((current - start == 8) &&
(0 == strncmp("FILENAME", src + start, 8))) ||
((current - start == 7) &&
(0 == strncmp("CONTENT", src + start, 7))) ||
((current - start == 14) &&
(0 == strncmp("DATE_FORMATTED", src + start, 14))) ||
((current - start == 20) &&
(0 == strncmp("DATE_FIRST_FORMATTED", src + start, 20))) ||
((current - start == 19) &&
(0 == strncmp("DATE_LAST_FORMATTED", src + start, 19))) ||
((current - start == 10) &&
(0 == strncmp("PAGE_FIRST", src + start, 10))) ||
((current - start == 13) &&
(0 == strncmp("PAGE_PREVIOUS", src + start, 13))) ||
((current - start == 12) &&
(0 == strncmp("PAGE_CURRENT", src + start, 12))) ||
((current - start == 9) &&
(0 == strncmp("PAGE_NEXT", src + start, 9))) ||
((current - start == 9) &&
(0 == strncmp("PAGE_LAST", src + start, 9))))
{
*err = blogc_error_new_printf(BLOGC_ERROR_SOURCE_PARSER,
"'%s' variable is forbidden in source files. It will "
"be set for you by the compiler.", key);
break;
}
state = SOURCE_CONFIG_VALUE_START;
break;
}
*err = blogc_error_parser(BLOGC_ERROR_SOURCE_PARSER, src, src_len,
current, "Invalid configuration key.");
break;
case SOURCE_CONFIG_VALUE_START:
if (c != '\n' && c != '\r') {
state = SOURCE_CONFIG_VALUE;
start = current;
break;
}
*err = blogc_error_parser(BLOGC_ERROR_SOURCE_PARSER, src, src_len,
current, "Configuration value not provided for '%s'.",
key);
break;
case SOURCE_CONFIG_VALUE:
if (c == '\n' || c == '\r') {
tmp = b_strndup(src + start, current - start);
b_trie_insert(rv, key, b_strdup(b_str_strip(tmp)));
free(tmp);
free(key);
key = NULL;
state = SOURCE_START;
}
break;
case SOURCE_SEPARATOR:
if (c == '-')
break;
if (c == '\n' || c == '\r') {
state = SOURCE_CONTENT_START;
break;
}
*err = blogc_error_parser(BLOGC_ERROR_SOURCE_PARSER, src, src_len,
current,
"Invalid content separator. Must be more than one '-' characters.");
break;
case SOURCE_CONTENT_START:
start = current;
state = SOURCE_CONTENT;
break;
case SOURCE_CONTENT:
if (c == '.') {
state = SOURCE_EXCERPT_SEPARATOR;
tmp = b_strndup(src + start, current - start);
b_trie_insert(rv, "EXCERPT", blogc_content_parse(tmp));
free(tmp);
tmp = NULL;
break;
}
if (current == (src_len - 1)) {
tmp = b_strndup(src + start, src_len - start);
b_trie_insert(rv, "EXCERPT", blogc_content_parse(tmp));
free(tmp);
tmp = NULL;
}
break;
case SOURCE_EXCERPT_SEPARATOR:
if (c == '.')
break;
if (c == '\n' || c == '\r') {
state = SOURCE_CONTENT2_START;
break;
}
*err = blogc_error_parser(BLOGC_ERROR_SOURCE_PARSER, src, src_len,
current,
"Invalid excerpt separator. Must be more than one '.' characters.");
break;
case SOURCE_CONTENT2_START:
start = current;
state = SOURCE_CONTENT2;
break;
case SOURCE_CONTENT2:
if (current == (src_len - 1)) {
tmp = b_strndup(src + start, src_len - start);
tmp2 = b_strdup_printf("%s\n%s",
b_trie_lookup(rv, "EXCERPT"), tmp);
free(tmp);
tmp = NULL;
b_trie_insert(rv, "CONTENT", blogc_content_parse(tmp2));
free(tmp2);
tmp2 = NULL;
}
if (c == '.') {
state = SOURCE_EXCERPT_SEPARATOR;
break;
}
break;
}
if (*err != NULL)
break;
current++;
}
if (b_trie_lookup(rv, "CONTENT") == NULL)
b_trie_insert(rv, "CONTENT", b_strdup(b_trie_lookup(rv, "EXCERPT")));
if (*err == NULL && b_trie_size(rv) == 0) {
// ok, nothing found in the config trie, but no error set either.
// let's try to be nice with the users and provide some reasonable
// output. :)
switch (state) {
case SOURCE_START:
*err = blogc_error_parser(BLOGC_ERROR_SOURCE_PARSER, src, src_len,
current, "Your config file is empty.");
break;
case SOURCE_CONFIG_KEY:
*err = blogc_error_parser(BLOGC_ERROR_SOURCE_PARSER, src, src_len,
current, "Your last configuration key is missing ':' and "
"the value");
break;
case SOURCE_CONFIG_VALUE_START:
*err = blogc_error_parser(BLOGC_ERROR_SOURCE_PARSER, src, src_len,
current, "Configuration value not provided for '%s'.",
key);
break;
case SOURCE_CONFIG_VALUE:
*err = blogc_error_parser(BLOGC_ERROR_SOURCE_PARSER, src, src_len,
current, "No line ending after the configuration value for "
"'%s'.", key);
break;
case SOURCE_SEPARATOR:
case SOURCE_CONTENT_START:
case SOURCE_CONTENT:
case SOURCE_EXCERPT_SEPARATOR:
case SOURCE_CONTENT2_START:
case SOURCE_CONTENT2:
break; // won't happen, and if even happen, shouldn't be fatal
}
}
if (*err != NULL) {
free(key);
b_trie_free(rv);
return NULL;
}
return rv;
}
|
