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
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
|
/*
* parser.c
*
* Copyright (C) 2012, 2013 James Booth <boothj5@gmail.com>
*
* This file is part of Profanity.
*
* Profanity 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 3 of the License, or
* (at your option) any later version.
*
* Profanity 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 Profanity. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <stdlib.h>
#include <string.h>
#include <glib.h>
/*
* Take a full line of input and return an array of strings representing
* the arguments of a command.
* If the number of arguments found is less than min, or more than max
* NULL is returned.
*
* inp - The line of input
* min - The minimum allowed number of arguments
* max - The maxmimum allowed number of arguments
*
* Returns - An NULL terminated array of strings representing the aguments
* of the command, or NULL if the validation fails.
*
* E.g. the following input line:
*
* /cmd arg1 arg2
*
* Will return a pointer to the following array:
*
* { "arg1", "arg2", NULL }
*
*/
gchar **
parse_args(const char * const inp, int min, int max)
{
if (inp == NULL) {
return NULL;
}
// copy and strip input of leading/trailing whitepsace
char *copy = strdup(inp);
g_strstrip(copy);
int inp_size = g_utf8_strlen(copy, -1);
gboolean in_token = FALSE;
gboolean in_quotes = FALSE;
char *token_start = ©[0];
int token_size = 0;
GSList *tokens = NULL;
// add tokens to GSList
int i;
for (i = 0; i < inp_size; i++) {
gchar *curr_ch = g_utf8_offset_to_pointer(copy, i);
gunichar curr_uni = g_utf8_get_char(curr_ch);
if (!in_token) {
if (curr_uni == ' ') {
continue;
} else {
in_token = TRUE;
if (curr_uni == '"') {
in_quotes = TRUE;
i++;
gchar *next_ch = g_utf8_next_char(curr_ch);
gunichar next_uni = g_utf8_get_char(next_ch);
token_start = next_ch;
token_size += g_unichar_to_utf8(next_uni, NULL);
} else {
token_start = curr_ch;
token_size += g_unichar_to_utf8(curr_uni, NULL);
}
}
} else {
if (in_quotes) {
if (curr_uni == '"') {
tokens = g_slist_append(tokens, g_strndup(token_start,
token_size));
token_size = 0;
in_token = FALSE;
in_quotes = FALSE;
} else {
token_size += g_unichar_to_utf8(curr_uni, NULL);
}
} else {
if (curr_uni == ' ') {
tokens = g_slist_append(tokens, g_strndup(token_start,
token_size));
token_size = 0;
in_token = FALSE;
} else {
token_size += g_unichar_to_utf8(curr_uni, NULL);
}
}
}
}
if (in_token) {
tokens = g_slist_append(tokens, g_strndup(token_start, token_size));
}
int num = g_slist_length(tokens) - 1;
// if num args not valid return NULL
if ((num < min) || (num > max)) {
g_slist_free_full(tokens, free);
g_free(copy);
return NULL;
// if min allowed is 0 and 0 found, return empty char* array
} else if (min == 0 && num == 0) {
g_slist_free_full(tokens, free);
gchar **args = malloc((num + 1) * sizeof(*args));
args[0] = NULL;
g_free(copy);
return args;
// otherwise return args array
} else {
gchar **args = malloc((num + 1) * sizeof(*args));
GSList *token = tokens;
token = g_slist_next(token);
int arg_count = 0;
while (token != NULL) {
args[arg_count++] = strdup(token->data);
token = g_slist_next(token);
}
args[arg_count] = NULL;
g_slist_free_full(tokens, free);
g_free(copy);
return args;
}
}
/*
* Take a full line of input and return an array of strings representing
* the arguments of a command. This function handles when the last parameter
* to the command is free text e.g.
*
* /msg user@host here is a message
*
* If the number of arguments found is less than min, or more than max
* NULL is returned.
*
* inp - The line of input
* min - The minimum allowed number of arguments
* max - The maxmimum allowed number of arguments
*
* Returns - An NULL terminated array of strings representing the aguments
* of the command, or NULL if the validation fails.
*
* E.g. the following input line:
*
* /cmd arg1 arg2 some free text
*
* Will return a pointer to the following array:
*
* { "arg1", "arg2", "some free text", NULL }
*
*/
gchar **
parse_args_with_freetext(const char * const inp, int min, int max)
{
if (inp == NULL) {
return NULL;
}
// copy and strip input of leading/trailing whitepsace
char *copy = strdup(inp);
g_strstrip(copy);
int inp_size = g_utf8_strlen(copy, -1);
gboolean in_token = FALSE;
gboolean in_freetext = FALSE;
gboolean in_quotes = FALSE;
char *token_start = ©[0];
int token_size = 0;
int num_tokens = 0;
GSList *tokens = NULL;
// add tokens to GSList
int i;
for (i = 0; i < inp_size; i++) {
gchar *curr_ch = g_utf8_offset_to_pointer(copy, i);
gunichar curr_uni = g_utf8_get_char(curr_ch);
if (!in_token) {
if (curr_uni == ' ') {
continue;
} else {
in_token = TRUE;
num_tokens++;
if ((num_tokens == max + 1) && (curr_uni != '"')) {
in_freetext = TRUE;
} else if (curr_uni == '"') {
in_quotes = TRUE;
i++;
gchar *next_ch = g_utf8_next_char(curr_ch);
gunichar next_uni = g_utf8_get_char(next_ch);
token_start = next_ch;
token_size += g_unichar_to_utf8(next_uni, NULL);
}
if (curr_uni == '"') {
gchar *next_ch = g_utf8_next_char(curr_ch);
token_start = next_ch;
} else {
token_start = curr_ch;
token_size += g_unichar_to_utf8(curr_uni, NULL);
}
}
} else {
if (in_quotes) {
if (curr_uni == '"') {
tokens = g_slist_append(tokens, g_strndup(token_start,
token_size));
token_size = 0;
in_token = FALSE;
in_quotes = FALSE;
} else {
if (curr_uni != '"') {
token_size += g_unichar_to_utf8(curr_uni, NULL);
}
}
} else {
if (in_freetext) {
token_size += g_unichar_to_utf8(curr_uni, NULL);
} else if (curr_uni == ' ') {
tokens = g_slist_append(tokens, g_strndup(token_start,
token_size));
token_size = 0;
in_token = FALSE;
} else if (curr_uni != '"') {
token_size += g_unichar_to_utf8(curr_uni, NULL);
}
}
}
}
if (in_token) {
tokens = g_slist_append(tokens, g_strndup(token_start, token_size));
}
int num = g_slist_length(tokens) - 1;
// if num args not valid return NULL
if ((num < min) || (num > max)) {
g_slist_free_full(tokens, free);
free(copy);
return NULL;
// if min allowed is 0 and 0 found, return empty char* array
} else if (min == 0 && num == 0) {
gchar **args = malloc((num + 1) * sizeof(*args));
args[0] = NULL;
return args;
// otherwise return args array
} else {
gchar **args = malloc((num + 1) * sizeof(*args));
GSList *token = tokens;
token = g_slist_next(token);
int arg_count = 0;
while (token != NULL) {
args[arg_count++] = strdup(token->data);
token = g_slist_next(token);
}
args[arg_count] = NULL;
g_slist_free_full(tokens, free);
free(copy);
return args;
}
}
int
count_tokens(char *string)
{
int length = g_utf8_strlen(string, -1);
gboolean in_quotes = FALSE;
int num_tokens = 0;
int i = 0;
// include first token
num_tokens++;
for (i = 0; i < length; i++) {
gchar *curr_ch = g_utf8_offset_to_pointer(string, i);
gunichar curr_uni = g_utf8_get_char(curr_ch);
if (curr_uni == ' ') {
if (!in_quotes) {
num_tokens++;
}
} else if (curr_uni == '"') {
if (in_quotes) {
in_quotes = FALSE;
} else {
in_quotes = TRUE;
}
}
}
return num_tokens;
}
char *
get_start(char *string, int tokens)
{
GString *result = g_string_new("");
int length = g_utf8_strlen(string, -1);
gboolean in_quotes = FALSE;
char *result_str = NULL;
int num_tokens = 0;
int i = 0;
// include first token
num_tokens++;
for (i = 0; i < length; i++) {
gchar *curr_ch = g_utf8_offset_to_pointer(string, i);
gunichar curr_uni = g_utf8_get_char(curr_ch);
if (num_tokens < tokens) {
gchar *uni_char = malloc(7);
int len = g_unichar_to_utf8(curr_uni, uni_char);
uni_char[len] = '\0';
g_string_append(result, uni_char);
}
if (curr_uni == ' ') {
if (!in_quotes) {
num_tokens++;
}
} else if (curr_uni == '"') {
if (in_quotes) {
in_quotes = FALSE;
} else {
in_quotes = TRUE;
}
}
}
result_str = result->str;
g_string_free(result, FALSE);
return result_str;
}
|