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
|
#ifndef foostrbufhfoo
#define foostrbufhfoo
#include <sys/types.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
struct chunk {
struct chunk *next;
char text[];
};
struct strbuf {
size_t length;
struct chunk *head, *tail;
};
struct strbuf *strbuf_new(void) {
struct strbuf *sb = malloc(sizeof(struct strbuf));
assert(sb);
sb->length = 0;
sb->head = sb->tail = NULL;
return sb;
}
void strbuf_free(struct strbuf *sb) {
assert(sb);
while (sb->head) {
struct chunk *c = sb->head;
sb->head = sb->head->next;
free(c);
}
free(sb);
}
char *strbuf_tostring(struct strbuf *sb) {
char *t, *e;
struct chunk *c;
assert(sb);
t = malloc(sb->length+1);
assert(t);
e = t;
*e = 0;
for (c = sb->head; c; c = c->next) {
strcpy(e, c->text);
e = strchr(e, 0);
}
return t;
}
void strbuf_puts(struct strbuf *sb, const char *t) {
struct chunk *c;
size_t l;
assert(sb && t);
l = strlen(t);
c = malloc(sizeof(struct chunk)+l);
assert(c);
c->next = NULL;
strcpy(c->text, t);
if (sb->tail) {
assert(sb->head);
sb->tail->next = c;
} else {
assert(!sb->head);
sb->head = c;
}
sb->tail = c;
sb->length += l;
}
int strbuf_printf(struct strbuf *sb, const char *format, ...) {
int r, size = 100;
struct chunk *c = NULL;
assert(sb);
for(;;) {
va_list ap;
c = realloc(c, sizeof(struct chunk)+size);
assert(c);
va_start(ap, format);
r = vsnprintf(c->text, size, format, ap);
va_end(ap);
if (r > -1 && r < size) {
c->next = NULL;
if (sb->tail) {
assert(sb->head);
sb->tail->next = c;
} else {
assert(!sb->head);
sb->head = c;
}
sb->tail = c;
sb->length += r;
return r;
}
if (r > -1) /* glibc 2.1 */
size = r+1;
else /* glibc 2.0 */
size *= 2;
}
}
#endif
|
