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
|
/*
* io.c
*
* Implements the imple I/O 'helper' routines.
*
* Not really essential, but these routines were used extensively in GD,
* so they were moved here. They also make IOCtx calls look better...
*
* Written (or, at least, moved) 1999, Philip Warner.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <math.h>
#include <string.h>
#include <stdlib.h>
#include "gd.h"
/* Use this for commenting out debug-print statements. */
/* Just use the first '#define' to allow all the prints... */
/*#define IO_DBG(s) (s) */
#define IO_DBG(s)
/*
* Write out a word to the I/O context pointer
*/
void
Putword (int w, gdIOCtx * ctx)
{
unsigned char buf[2];
buf[0] = w & 0xff;
buf[1] = (w / 256) & 0xff;
(ctx->putBuf) (ctx, (char *) buf, 2);
}
void
Putchar (int c, gdIOCtx * ctx)
{
(ctx->putC) (ctx, c & 0xff);
}
void
gdPutC (const unsigned char c, gdIOCtx * ctx)
{
(ctx->putC) (ctx, c);
}
void
gdPutWord (int w, gdIOCtx * ctx)
{
IO_DBG (printf ("Putting word...\n"));
(ctx->putC) (ctx, (unsigned char) (w >> 8));
(ctx->putC) (ctx, (unsigned char) (w & 0xFF));
IO_DBG (printf ("put.\n"));
}
void
gdPutInt (int w, gdIOCtx * ctx)
{
IO_DBG (printf ("Putting int...\n"));
(ctx->putC) (ctx, (unsigned char) (w >> 24));
(ctx->putC) (ctx, (unsigned char) ((w >> 16) & 0xFF));
(ctx->putC) (ctx, (unsigned char) ((w >> 8) & 0xFF));
(ctx->putC) (ctx, (unsigned char) (w & 0xFF));
IO_DBG (printf ("put.\n"));
}
int
gdGetC (gdIOCtx * ctx)
{
return ((ctx->getC) (ctx));
}
int
gdGetByte (int *result, gdIOCtx * ctx)
{
int r;
r = (ctx->getC) (ctx);
if (r == EOF)
{
return 0;
}
*result = r;
return 1;
}
int
gdGetWord (int *result, gdIOCtx * ctx)
{
int r;
r = (ctx->getC) (ctx);
if (r == EOF)
{
return 0;
}
*result = r << 8;
r = (ctx->getC) (ctx);
if (r == EOF)
{
return 0;
}
*result += r;
return 1;
}
int
gdGetInt (int *result, gdIOCtx * ctx)
{
int r;
r = (ctx->getC) (ctx);
if (r == EOF)
{
return 0;
}
*result = r << 24;
r = (ctx->getC) (ctx);
if (r == EOF)
{
return 0;
}
*result += r << 16;
r = (ctx->getC) (ctx);
if (r == EOF)
{
return 0;
}
*result += r << 8;
r = (ctx->getC) (ctx);
if (r == EOF)
{
return 0;
}
*result += r;
return 1;
}
int
gdPutBuf (const void *buf, int size, gdIOCtx * ctx)
{
IO_DBG (printf ("Putting buf...\n"));
return (ctx->putBuf) (ctx, buf, size);
IO_DBG (printf ("put.\n"));
}
int
gdGetBuf (void *buf, int size, gdIOCtx * ctx)
{
return (ctx->getBuf) (ctx, buf, size);
}
int
gdSeek (gdIOCtx * ctx, const int pos)
{
IO_DBG (printf ("Seeking...\n"));
return ((ctx->seek) (ctx, pos));
IO_DBG (printf ("Done.\n"));
}
long
gdTell (gdIOCtx * ctx)
{
IO_DBG (printf ("Telling...\n"));
return ((ctx->tell) (ctx));
IO_DBG (printf ("told.\n"));
}
|
