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
|
/*
* Creation and destruction.
*/
#include "fitz_base.h"
#include "fitz_stream.h"
static fz_stream *
newstm(int kind)
{
fz_stream *stm;
stm = fz_malloc(sizeof(fz_stream));
if (!stm)
return nil;
stm->refs = 1;
stm->kind = kind;
stm->dead = 0;
stm->error = fz_okay;
stm->buffer = nil;
stm->chain = nil;
stm->filter = nil;
stm->file = -1;
return stm;
}
fz_stream *
fz_keepstream(fz_stream *stm)
{
stm->refs ++;
return stm;
}
void
fz_dropstream(fz_stream *stm)
{
stm->refs --;
if (stm->refs == 0)
{
if (stm->error)
{
fz_catch(stm->error, "dropped unhandled ioerror");
stm->error = fz_okay;
}
switch (stm->kind)
{
case FZ_SFILE:
close(stm->file);
break;
case FZ_SFILTER:
fz_dropfilter(stm->filter);
fz_dropstream(stm->chain);
break;
case FZ_SBUFFER:
break;
}
fz_dropbuffer(stm->buffer);
fz_free(stm);
}
}
fz_error * fz_openrfile(fz_stream **stmp, char *path)
{
fz_error *error;
fz_stream *stm;
stm = newstm(FZ_SFILE);
if (!stm)
return fz_throw("outofmem: stream struct");
error = fz_newbuffer(&stm->buffer, FZ_BUFSIZE);
if (error)
{
fz_free(stm);
return fz_rethrow(error, "cannot create buffer");
}
stm->file = open(path, O_BINARY | O_RDONLY, 0666);
if (stm->file < 0)
{
fz_dropbuffer(stm->buffer);
fz_free(stm);
return fz_throw("syserr: open '%s': %s", path, strerror(errno));
}
*stmp = stm;
return fz_okay;
}
fz_error * fz_openrfilter(fz_stream **stmp, fz_filter *flt, fz_stream *src)
{
fz_error *error;
fz_stream *stm;
stm = newstm(FZ_SFILTER);
if (!stm)
return fz_throw("outofmem: stream struct");
error = fz_newbuffer(&stm->buffer, FZ_BUFSIZE);
if (error)
{
fz_free(stm);
return fz_rethrow(error, "cannot create buffer");
}
stm->chain = fz_keepstream(src);
stm->filter = fz_keepfilter(flt);
*stmp = stm;
return fz_okay;
}
fz_error * fz_openrbuffer(fz_stream **stmp, fz_buffer *buf)
{
fz_stream *stm;
stm = newstm(FZ_SBUFFER);
if (!stm)
return fz_throw("outofmem: stream struct");
stm->buffer = fz_keepbuffer(buf);
stm->buffer->eof = 1;
*stmp = stm;
return fz_okay;
}
fz_error * fz_openrmemory(fz_stream **stmp, unsigned char *mem, int len)
{
fz_error *error;
fz_buffer *buf;
error = fz_newbufferwithmemory(&buf, mem, len);
if (error)
return fz_rethrow(error, "cannot create memory buffer");
error = fz_openrbuffer(stmp, buf);
if (error)
{
fz_dropbuffer(buf);
return fz_rethrow(error, "cannot open memory buffer stream");
}
fz_dropbuffer(buf);
return fz_okay;
}
|
