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
|
#include <fitz.h>
fz_error fz_kioneedin = { -1, "<ioneedin>", "<process>", "filter.c", 0 };
fz_error fz_kioneedout = { -1, "<ioneedout>", "<process>", "filter.c", 0 };
fz_error fz_kiodone = { -1, "<iodone>", "<process>", "filter.c", 0 };
fz_error *
fz_process(fz_filter *f, fz_buffer *in, fz_buffer *out)
{
fz_error *reason;
unsigned char *oldrp;
unsigned char *oldwp;
assert(!out->eof);
oldrp = in->rp;
oldwp = out->wp;
reason = f->process(f, in, out);
assert(in->rp <= in->wp);
assert(out->wp <= out->ep);
f->consumed = in->rp > oldrp;
f->produced = out->wp > oldwp;
f->count += out->wp - oldwp;
if (reason != fz_ioneedin && reason != fz_ioneedout)
out->eof = 1;
return reason;
}
fz_filter *
fz_keepfilter(fz_filter *f)
{
f->refs ++;
return f;
}
void
fz_dropfilter(fz_filter *f)
{
if (--f->refs == 0)
{
if (f->drop)
f->drop(f);
fz_free(f);
}
}
|
