/
rb_sdl_rwops.c
162 lines (133 loc) · 3.32 KB
/
rb_sdl_rwops.c
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
/*
* SDL_RWops - ruby interface
*
* Author:: Ed Sinjiashvili (slimb@vlinkmail.com)
* License:: LGPL
*/
#include "SDL_rwops.h"
#include "ruby.h"
#include "rb_physfs.h"
#include "rb_sdl_rwops.h"
VALUE classRWops;
/*
* RWops constructor
*/
VALUE sdl_rwops_new (SDL_RWops *ops)
{
VALUE result;
if (ops == 0)
return Qnil;
result = Data_Wrap_Struct (classRWops, 0, SDL_FreeRW, ops);
return result;
}
/*
* PhysicsFS::RWops::from_file name, mode
*
* create RWops object from file
*/
VALUE sdl_rwops_from_file (VALUE self, VALUE name, VALUE mode)
{
SDL_RWops *ops = SDL_RWFromFile(STR2CSTR(name), STR2CSTR(mode));
return sdl_rwops_new (ops);
}
/*
* PhysicsFS::RWops::from_memory string
*
* create RWops object from memory
*/
VALUE sdl_rwops_from_mem (VALUE self, VALUE str)
{
int len = RSTRING(str)->len;
void *mem = STR2CSTR(str);
SDL_RWops *ops = SDL_RWFromMem(mem, len);
return sdl_rwops_new (ops);
}
/*
* PhysicsFS::RWops#seek offset, whence
*
* position RWops object
*/
VALUE sdl_rwops_seek (VALUE self, VALUE offset, VALUE whence)
{
int result;
SDL_RWops *ops;
Data_Get_Struct (self, SDL_RWops, ops);
if (ops == 0)
return Qnil;
result = SDL_RWseek(ops, FIX2INT(offset), FIX2INT(whence));
return INT2FIX(result);
}
/*
* PhysicsFS::RWops#close
*
* close RWops. No use of the object is possible after that.
*/
VALUE sdl_rwops_close (VALUE self)
{
int result;
SDL_RWops *ops;
Data_Get_Struct (self, SDL_RWops, ops);
if (ops == 0)
return Qnil;
result = SDL_RWclose (ops);
DATA_PTR(self) = 0;
return INT2FIX(result);
}
/*
* PhysicsFS::RWops#read
*
* read from RWops object objCount objSize'd entities.
* return string containing raw data or nil
*/
VALUE sdl_rwops_read (VALUE self, VALUE objSize, VALUE objCount)
{
int objRead;
void *buffer;
VALUE result;
SDL_RWops *ops;
Data_Get_Struct (self, SDL_RWops, ops);
if (ops == 0)
return Qnil;
buffer = malloc (FIX2UINT(objSize) * FIX2UINT(objCount));
if (buffer == 0)
return Qnil;
objRead = SDL_RWread (ops, buffer, FIX2UINT(objSize), FIX2UINT(objCount));
if (objRead == -1)
{
free (buffer);
return Qnil;
}
result = rb_str_new (buffer, objRead * FIX2UINT(objSize));
free (buffer);
return result;
}
/*
* PhysicsFS::RWops#write buffer, size, n
*
* write raw string containing n objects size length each.
* return number of objects written or nil
*/
VALUE sdl_rwops_write (VALUE self, VALUE buffer, VALUE size, VALUE n)
{
int result;
SDL_RWops *ops;
Data_Get_Struct (self, SDL_RWops, ops);
if (ops == 0)
return Qnil;
result = SDL_RWwrite (ops, STR2CSTR(buffer), FIX2INT(size), FIX2INT(n));
if (result == -1)
return Qnil;
return INT2FIX(result);
}
void init_sdl_rwops (void)
{
classRWops = rb_define_class_under (modulePhysfs, "RWops", rb_cObject);
rb_define_method (classRWops, "seek", sdl_rwops_seek, 2);
rb_define_method (classRWops, "read", sdl_rwops_read, 2);
rb_define_method (classRWops, "write", sdl_rwops_write, 3);
rb_define_method (classRWops, "close", sdl_rwops_close, 0);
rb_define_singleton_method (classRWops, "from_file",
sdl_rwops_from_file, 2);
rb_define_singleton_method (classRWops, "from_memory",
sdl_rwops_from_mem, 1);
}