#include <sys/types.h>
#include <sys/stat.h>
#include <sys/file.h>
+#include <sys/mman.h>
#include "tags.h"
#include "config.h"
for (i = 0; i < len; i++) {
tag_scan_start:
- if (data[i] == '#') {
+ if (data[i] == '#' || data[i] == '@') {
if (n_tags == MAX_TAGS) {
fprintf(stderr, "Too many tags in message\n");
break;
}
+ int begin = i;
int start = ++i;
while (i < len && TAG_CHAR(data[i]) && (i - start < MAX_TAG_LENGTH)) {
i++;
}
if (start - i == 0) continue;
- char *tag = calloc(1, MAX_TAG_LENGTH + 1);
- memcpy(tag, &data[start], i - start);
+ char *tag = calloc(1, MAX_TAG_LENGTH + 2);
+ memcpy(tag, &data[begin], i - begin);
for (j = 0; j < n_tags; j++) {
if (!strncmp(tag, taglist[j], MAX_TAG_LENGTH)) {
// We already have this tag. Start over.
strncpy(t.author, author, 32);
t.record = record;
- snprintf(filename, 512, "%s/%s", TAGS_PATH, tag);
+ switch(tag[0]) {
+ case '#':
+ snprintf(filename, 512, "%s/%s", HASH_TAGS_PATH, tag + 1);
+ break;
+ case '@':
+ snprintf(filename, 512, "%s/%s", AUTHOR_TAGS_PATH, tag + 1);
+ break;
+ default:
+ fprintf(stderr, "Invalid tag type: %s\n", tag);
+ return 0;
+ }
+
int tag_fd = open(filename, O_WRONLY | O_APPEND | O_CREAT, 0600);
flock(tag_fd, LOCK_EX);
if (tag_fd == -1) {
return 1;
}
-int tag_list(const char *tag, int start, int count) {
+struct tag * tag_list(const char *tag, uint64_t offset, uint64_t *count, int direction) {
+ char filename[512];
+ struct stat st;
+ struct tag *taglist;
+ struct tag *retlist;
+ uint64_t n_tag_records;
+
+ switch(tag[0]) {
+ case '#':
+ snprintf(filename, 512, "%s/%s", HASH_TAGS_PATH, tag + 1);
+ break;
+ case '@':
+ snprintf(filename, 512, "%s/%s", AUTHOR_TAGS_PATH, tag + 1);
+ break;
+ default:
+ fprintf(stderr, "Invalid tag type: %s\n", tag);
+ return 0;
+ }
+
+ int tag_fd = open(filename, O_RDONLY, 0600);
+ if (tag_fd == -1) {
+ perror("Could not open tag file");
+ *count = 0;
+ return NULL;
+ }
+
+ fstat(tag_fd, &st);
+ if (st.st_size == 0) {
+ close(tag_fd);
+ *count = 0;
+ return NULL;
+ }
+ n_tag_records = st.st_size / sizeof(struct tag);
+ if (*count > n_tag_records)
+ *count = n_tag_records;
+ if (offset > n_tag_records) {
+ fprintf(stderr, "Cannot access tag record beyond end\n");
+ return NULL;
+ }
+
+ taglist = (struct tag *) mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, tag_fd, 0);
+ if (taglist == MAP_FAILED) {
+ perror("Could not mmap tag file");
+ goto tag_list_map_failed;
+ }
+ retlist = (struct tag *) malloc(sizeof(struct tag) * *count);
+ if (retlist == NULL) {
+ perror("Could not allocate memory for tag list");
+ goto tag_list_malloc_failed;
+ }
+ switch(direction) {
+ case 1:
+ memcpy(retlist, taglist + offset, sizeof(struct tag) * *count);
+ break;
+ case -1:
+ memcpy(retlist, taglist + (n_tag_records - *count - offset), sizeof(struct tag) * *count);
+ break;
+ }
+
+ munmap(taglist, st.st_size);
+ return retlist;
+
+tag_list_malloc_failed:
+ munmap(taglist, st.st_size);
+tag_list_map_failed:
+ close(tag_fd);
+tag_list_open_failed:
+ return NULL;
}