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#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"
char *gpats;
bool fixed, extended, icase;
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, "FihV")) != -1) {
switch (opt) {
case 'F':
fixed = true;
break;
case 'i':
icase = 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(1);
}
}
return argv + optind;
}
static char **get_patterns(size_t *_npat) {
char **patterns;
size_t npat = 0;
{
size_t cappat = 1 << 4;
patterns = calloc(sizeof(char*), cappat);
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++;
}
}
*_npat = npat;
return patterns;
}
static int process_regex(char *fname, bool isstdin) {
FILE *stream = isstdin ? stdin : fopen(fname, "rb");
size_t npat = 0;
char **patterns = get_patterns(&npat);
regex_t **regexps = calloc(sizeof(regex_t*), npat);
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) {
// TODO: error
return 1;
}
free(patterns[i]);
regexps[i] = regexp;
}
free(patterns);
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++) {
regex_t *regexp = regexps[i];
regmatch_t pmatch;
if (regexec(regexp, line, 1, &pmatch, 0) == 0) {
printf("%s", line);
}
}
}
free(line);
for (size_t i = 0; i < npat; i++) regfree(regexps[i]);
free(regexps);
return 0;
}
static int process_fixed(char *fname, bool isstdin) {
FILE *stream = isstdin ? stdin : fopen(fname, "rb");
size_t npat = 0;
char **patterns = get_patterns(&npat);
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++) {
char *pat = patterns[i];
if (strstr(line, pat) == NULL) continue;
printf("%s", line);
}
}
free(line);
for (size_t i = 0; i < npat; i++) free(patterns[i]);
free(patterns);
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 1;
}
gpats = *args;
args++;
if (fixed) {
return loop_args(args, process_fixed);
} else {
return loop_args(args, process_regex);
}
}
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