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
|
#include "fitz-internal.h"
fz_buffer *
fz_new_buffer(fz_context *ctx, int size)
{
fz_buffer *b;
size = size > 1 ? size : 16;
b = fz_malloc_struct(ctx, fz_buffer);
b->refs = 1;
fz_try(ctx)
{
b->data = fz_malloc(ctx, size);
}
fz_catch(ctx)
{
fz_free(ctx, b);
fz_rethrow(ctx);
}
b->cap = size;
b->len = 0;
return b;
}
fz_buffer *
fz_keep_buffer(fz_context *ctx, fz_buffer *buf)
{
if (buf)
{
if (buf->refs == 1 && buf->cap > buf->len+1)
fz_resize_buffer(ctx, buf, buf->len);
buf->refs ++;
}
return buf;
}
void
fz_drop_buffer(fz_context *ctx, fz_buffer *buf)
{
if (!buf)
return;
if (--buf->refs == 0)
{
fz_free(ctx, buf->data);
fz_free(ctx, buf);
}
}
void
fz_resize_buffer(fz_context *ctx, fz_buffer *buf, int size)
{
buf->data = fz_resize_array(ctx, buf->data, size, 1);
buf->cap = size;
if (buf->len > buf->cap)
buf->len = buf->cap;
}
void
fz_grow_buffer(fz_context *ctx, fz_buffer *buf)
{
fz_resize_buffer(ctx, buf, (buf->cap * 3) / 2);
}
void
fz_trim_buffer(fz_context *ctx, fz_buffer *buf)
{
if (buf->cap > buf->len+1)
fz_resize_buffer(ctx, buf, buf->len);
}
int
fz_buffer_storage(fz_context *ctx, fz_buffer *buf, unsigned char **datap)
{
if (datap)
*datap = (buf ? buf->data : NULL);
return (buf ? buf->len : 0);
}
void
fz_buffer_printf(fz_context *ctx, fz_buffer *buffer, char *fmt, ...)
{
int count;
int done = 0;
va_list args;
va_start(args, fmt);
while(!done)
{
count = vsnprintf(buffer->data + buffer->len, buffer->cap - buffer->len, fmt, args);
done = (count >= 0 && count < buffer->cap - buffer->len);
if (!done)
fz_grow_buffer(ctx, buffer);
}
buffer->len += count;
va_end(args);
}
|
