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authorLieuwe Rooijakkers <lieuwerooijakkers@gmail.com>2024-08-06 19:34:00 +0200
committerLieuwe Rooijakkers <lieuwerooijakkers@gmail.com>2024-08-06 19:41:07 +0200
commit3145dd8188c4c807b5cfb6cd16a3e8088544f96e (patch)
tree02224110f85c052bd3b4cbeaa6a80f10c93d54e7 /src
parent37669147781468a0908c1240b26055898ca1e431 (diff)
simple grijp with fixed strings only
Diffstat (limited to 'src')
-rw-r--r--src/grijp.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/src/grijp.c b/src/grijp.c
new file mode 100644
index 0000000..0c406f4
--- /dev/null
+++ b/src/grijp.c
@@ -0,0 +1,104 @@
+#include <assert.h>
+#include <errno.h>
+#include <getopt.h>
+#include <pwd.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;
+
+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, "hV")) != -1) {
+ switch (opt) {
+ 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 int process(char *fname, bool isstdin) {
+ FILE *stream = isstdin ? stdin : fopen(fname, "rb");
+
+ 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++;
+ }
+ }
+
+ 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++;
+ return loop_args(args, process);
+}