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
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
#include <errno.h>
#include <fcntl.h>
#include <libgen.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include "history.h"
#include "log.h"
#include "mkdirp.h"
#include "xmalloc.h"
#define MAX_HISTFILE_SIZE (10*1024*1024)
static const char *default_state_dir = ".local/state";
static const char *histfile_basename = "tofi-history";
static const char *drun_histfile_basename = "tofi-drun-history";
[[nodiscard("memory leaked")]]
static struct history history_create(void);
static char *get_histfile_path(bool drun) {
const char *basename;
if (drun) {
basename = drun_histfile_basename;
} else {
basename = histfile_basename;
}
char *histfile_name = NULL;
const char *state_path = getenv("XDG_STATE_HOME");
if (state_path == NULL) {
const char *home = getenv("HOME");
if (home == NULL) {
log_error("Couldn't retrieve HOME from environment.\n");
return NULL;
}
size_t len = strlen(home) + 1
+ strlen(default_state_dir) + 1
+ strlen(basename) + 1;
histfile_name = xmalloc(len);
snprintf(
histfile_name,
len,
"%s/%s/%s",
home,
default_state_dir,
basename);
} else {
size_t len = strlen(state_path) + 1
+ strlen(basename) + 1;
histfile_name = xmalloc(len);
snprintf(
histfile_name,
len,
"%s/%s",
state_path,
basename);
}
return histfile_name;
}
struct history history_load(const char *path)
{
struct history vec = history_create();
FILE *histfile = fopen(path, "rb");
if (histfile == NULL) {
return vec;
}
errno = 0;
if (fseek(histfile, 0, SEEK_END) != 0) {
log_error("Error seeking in history file: %s.\n", strerror(errno));
fclose(histfile);
return vec;
}
errno = 0;
size_t len = ftell(histfile);
if (len > MAX_HISTFILE_SIZE) {
log_error("History file too big (> %d MiB)! Are you sure it's a file?\n", MAX_HISTFILE_SIZE / 1024 / 1024);
fclose(histfile);
return vec;
}
errno = 0;
if (fseek(histfile, 0, SEEK_SET) != 0) {
log_error("Error seeking in history file: %s.\n", strerror(errno));
fclose(histfile);
return vec;
}
errno = 0;
char *buf = xmalloc(len + 1);
if (fread(buf, 1, len, histfile) != len) {
log_error("Error reading history file: %s.\n", strerror(errno));
fclose(histfile);
return vec;
}
fclose(histfile);
buf[len] = '\0';
char *saveptr = NULL;
char *tok = strtok_r(buf, " ", &saveptr);
while (tok != NULL) {
size_t run_count = strtoull(tok, NULL, 10);
tok = strtok_r(NULL, "\n", &saveptr);
if (tok == NULL) {
break;
}
history_add(&vec, tok);
vec.buf[vec.count - 1].run_count = run_count;
tok = strtok_r(NULL, " ", &saveptr);
}
free(buf);
return vec;
}
void history_save(const struct history *history, const char *path)
{
/* Create the path if necessary. */
if (!mkdirp(path)) {
return;
}
/* Use open rather than fopen to ensure the proper permissions. */
int histfd = open(path, O_WRONLY | O_CREAT, 0600);
FILE *histfile = fdopen(histfd, "wb");
if (histfile == NULL) {
return;
}
for (size_t i = 0; i < history->count; i++) {
fprintf(histfile, "%zu %s\n", history->buf[i].run_count, history->buf[i].name);
}
fclose(histfile);
}
struct history history_load_default_file(bool drun)
{
char *histfile_name = get_histfile_path(drun);
if (histfile_name == NULL) {
return history_create();
}
struct history vec = history_load(histfile_name);
free(histfile_name);
return vec;
}
void history_save_default_file(const struct history *history, bool drun)
{
char *histfile_name = get_histfile_path(drun);
if (histfile_name == NULL) {
return;
}
history_save(history, histfile_name);
free(histfile_name);
}
struct history history_create(void)
{
struct history vec = {
.count = 0,
.size = 16,
.buf = xcalloc(16, sizeof(struct program))
};
return vec;
}
void history_destroy(struct history *restrict vec)
{
for (size_t i = 0; i < vec->count; i++) {
free(vec->buf[i].name);
}
free(vec->buf);
}
void history_add(struct history *restrict vec, const char *restrict str)
{
/*
* If the program's already in our vector, just increment the count and
* move the program up if needed.
*/
for (size_t i = 0; i < vec->count; i++) {
if (!strcmp(vec->buf[i].name, str)) {
vec->buf[i].run_count++;
size_t count = vec->buf[i].run_count;
if (i > 0 && count <= vec->buf[i-1].run_count) {
return;
}
/* We need to move the program up the list */
size_t j = i;
while (j > 0 && count > vec->buf[j-1].run_count) {
j--;
}
struct program tmp = vec->buf[i];
memmove(&vec->buf[j+1], &vec->buf[j], (i - j) * sizeof(struct program));
vec->buf[j] = tmp;
return;
}
}
/* Otherwise add it to the end with a run count of 1 */
if (vec->count == vec->size) {
vec->size *= 2;
vec->buf = xrealloc(vec->buf, vec->size * sizeof(vec->buf[0]));
}
vec->buf[vec->count].name = xstrdup(str);
vec->buf[vec->count].run_count = 1;
vec->count++;
}
void history_remove(struct history *restrict vec, const char *restrict str)
{
for (size_t i = 0; i < vec->count; i++) {
if (!strcmp(vec->buf[i].name, str)) {
free(vec->buf[i].name);
if (i < vec->count - 1) {
memmove(&vec->buf[i], &vec->buf[i+1], (vec->count - i) * sizeof(struct program));
}
vec->count--;
return;
}
}
}
|
