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
|
#include <assert.h>
#include <errno.h>
#include <getopt.h>
#include <pwd.h>
#include <regex.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include "util/debug.h"
#include "util/error.h"
#include "util/loop_args.h"
#include "util/versie.h"
#include "io/read_file.h"
static char *gpats;
static bool fixed = false;
static bool extended = false;
static bool icase = false;
static bool binary = false;
static bool list = false;
static bool invert = false;
static bool quiet = false;
static size_t npat = 0;
static void **patterns = NULL; // can hold `char*` or `regex_t*`
static size_t nfiles;
static bool anyMatch = false;
static void usage(FILE *f) {
fprintf(f,
"Gebruik: grijp [-hV] [PATRONEN] [BESTAND]...\n"
"\n"
"TODO\n"
"\n"
" -h Toon deze hulptekst\n"
" -V Toon versienummer\n");
}
// Returns pointer to argument array containing patterns and then the file names
static char** parse_options(int argc, char **argv) {
int opt;
while ((opt = getopt(argc, argv, "FiEUlLvqhV")) != -1) {
switch (opt) {
case 'F':
fixed = true;
break;
case 'i':
icase = true;
break;
case 'E':
extended = true;
break;
case 'U':
binary = true;
break;
case 'l':
list = true;
break;
case 'L':
invert = true;
list = true;
break;
case 'v':
invert = true;
break;
case 'q':
quiet = true;
break;
case 'h':
usage(stdout);
exit(0);
case 'V':
drukkedoos_print_versie(stdout);
exit(0);
case '?':
fprintf(stderr, "grijp: Ongeldige optie: -%c\n", optopt);
usage(stderr);
exit(2);
}
}
return argv + optind;
}
static void parse_patterns() {
size_t cappat = 1 << 4;
patterns = calloc(cappat, sizeof(char*));
char *s = gpats;
char *pat = NULL;
while ((pat = strtok(s, "\n")) != NULL) {
s = NULL;
if (npat == cappat) {
cappat *= 2;
patterns = realloc(patterns, sizeof(char*)*cappat);
}
patterns[npat] = strdup(pat);
npat++;
}
}
static void compile_regexps() {
for (size_t i = 0; i < npat; i++) {
regex_t *regexp = calloc(1, sizeof(regex_t));
int flags = 0;
if (extended) flags |= REG_EXTENDED;
if (icase) flags |= REG_ICASE;
if (regcomp(regexp, patterns[i], flags) != 0) {
fprintf(stderr, "grijp: fout tijdens compileren van reguliere expressie\n");
exit(2);
}
free(patterns[i]);
patterns[i] = regexp;
}
}
static void printMatch(char *fname, char *line) {
if (quiet) return;
if (list) {
printf("%s\n", fname);
return;
}
if (nfiles >= 2) {
printf("%s:", fname);
}
printf("%s", line);
}
static int process(char *fname, bool isstdin) {
FILE *stream = isstdin ? stdin : fopen(fname, binary ? "rb" : "r");
if (stream == NULL && !isstdin) {
fprintf(stderr, "grijp: %s: fout tijdens openen bestand\n", fname);
return 2;
} else if (stream == NULL && isstdin) {
fprintf(stderr, "grijp: fout tijdens lezen standaard invoer\n");
return 2;
}
char *line = NULL;
size_t linen = 0;
ssize_t nread = 0;
while ((errno = 0, nread = getline(&line, &linen, stream)) != -1) {
for (size_t i = 0; i < npat; i++) {
bool matches = false;
if (fixed) {
char *pat = patterns[i];
matches = (strstr(line, pat) != NULL);
} else {
regex_t *regexp = patterns[i];
regmatch_t pmatch;
matches = (regexec(regexp, line, 1, &pmatch, 0) == 0);
}
if (invert) matches = !matches;
if (matches) {
anyMatch = true;
printMatch(fname, line);
if (list) goto done;
}
}
}
done:
free(line);
if (!isstdin) fclose(stream);
return 0;
}
int entry_grijp(int argc, char **argv) {
char **args = parse_options(argc, argv);
if (*args == NULL) {
fprintf(stderr, "grijp: geen patroon gegeven\n");
return 2;
}
gpats = *args;
args++;
// count the amount of files provided
for (nfiles = 0; args[nfiles] != NULL; nfiles++);
parse_patterns();
int res = 0;
if (fixed) {
res = loop_args(args, process);
} else {
compile_regexps();
res = loop_args(args, process);
for (size_t i = 0; i < npat; i++) regfree(patterns[i]);
}
for (size_t i = 0; i < npat; i++) free(patterns[i]);
free(patterns);
if (res == 0 && !anyMatch) res = 1;
return res;
}
|
