149 lines
3.7 KiB
C
149 lines
3.7 KiB
C
/* Copyright (C) 2018 Curtis McEnroe <june@causal.agency>
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <err.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sysexits.h>
|
|
|
|
#include "chat.h"
|
|
|
|
static struct Entry {
|
|
struct Tag tag;
|
|
char *word;
|
|
struct Entry *prev;
|
|
struct Entry *next;
|
|
} *head;
|
|
|
|
static void prepend(struct Entry *entry) {
|
|
entry->prev = NULL;
|
|
entry->next = head;
|
|
if (head) head->prev = entry;
|
|
head = entry;
|
|
}
|
|
|
|
static void unlink(struct Entry *entry) {
|
|
if (entry->prev) entry->prev->next = entry->next;
|
|
if (entry->next) entry->next->prev = entry->prev;
|
|
if (head == entry) head = entry->next;
|
|
}
|
|
|
|
static void touch(struct Entry *entry) {
|
|
if (head == entry) return;
|
|
unlink(entry);
|
|
prepend(entry);
|
|
}
|
|
|
|
static struct Entry *find(struct Tag tag, const char *word) {
|
|
for (struct Entry *entry = head; entry; entry = entry->next) {
|
|
if (entry->tag.id != tag.id) continue;
|
|
if (strcmp(entry->word, word)) continue;
|
|
return entry;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static void add(struct Tag tag, const char *word) {
|
|
struct Entry *entry = malloc(sizeof(*entry));
|
|
if (!entry) err(EX_OSERR, "malloc");
|
|
|
|
entry->tag = tag;
|
|
entry->word = strdup(word);
|
|
if (!entry->word) err(EX_OSERR, "strdup");
|
|
|
|
prepend(entry);
|
|
}
|
|
|
|
void tabTouch(struct Tag tag, const char *word) {
|
|
struct Entry *entry = find(tag, word);
|
|
if (entry) {
|
|
touch(entry);
|
|
} else {
|
|
add(tag, word);
|
|
}
|
|
}
|
|
|
|
void tabAdd(struct Tag tag, const char *word) {
|
|
if (!find(tag, word)) add(tag, word);
|
|
}
|
|
|
|
void tabReplace(struct Tag tag, const char *prev, const char *next) {
|
|
struct Entry *entry = find(tag, prev);
|
|
if (!entry) return;
|
|
touch(entry);
|
|
free(entry->word);
|
|
entry->word = strdup(next);
|
|
if (!entry->word) err(EX_OSERR, "strdup");
|
|
}
|
|
|
|
static struct Entry *iter;
|
|
|
|
void tabRemove(struct Tag tag, const char *word) {
|
|
for (struct Entry *entry = head; entry; entry = entry->next) {
|
|
if (entry->tag.id != tag.id) continue;
|
|
if (strcmp(entry->word, word)) continue;
|
|
if (iter == entry) iter = entry->prev;
|
|
unlink(entry);
|
|
free(entry->word);
|
|
free(entry);
|
|
return;
|
|
}
|
|
}
|
|
|
|
void tabClear(struct Tag tag) {
|
|
for (struct Entry *entry = head; entry; entry = entry->next) {
|
|
if (entry->tag.id != tag.id) continue;
|
|
if (iter == entry) iter = entry->prev;
|
|
unlink(entry);
|
|
free(entry->word);
|
|
free(entry);
|
|
}
|
|
}
|
|
|
|
struct Tag tabTag(const char *word) {
|
|
struct Entry *start = (iter ? iter->next : head);
|
|
for (struct Entry *entry = start; entry; entry = entry->next) {
|
|
if (strcmp(entry->word, word)) continue;
|
|
iter = entry;
|
|
return entry->tag;
|
|
}
|
|
iter = NULL;
|
|
return TagNone;
|
|
}
|
|
|
|
const char *tabNext(struct Tag tag, const char *prefix) {
|
|
size_t len = strlen(prefix);
|
|
struct Entry *start = (iter ? iter->next : head);
|
|
for (struct Entry *entry = start; entry; entry = entry->next) {
|
|
if (entry->tag.id != TagNone.id && entry->tag.id != tag.id) continue;
|
|
if (strncasecmp(entry->word, prefix, len)) continue;
|
|
iter = entry;
|
|
return entry->word;
|
|
}
|
|
if (!iter) return NULL;
|
|
iter = NULL;
|
|
return tabNext(tag, prefix);
|
|
}
|
|
|
|
void tabAccept(void) {
|
|
if (iter) touch(iter);
|
|
iter = NULL;
|
|
}
|
|
|
|
void tabReject(void) {
|
|
iter = NULL;
|
|
}
|