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
|
/* Copyright (C) 2018 C. 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;
}
|