c62d2810 |
1 | /* FCE Ultra - NES/Famicom Emulator |
2 | * |
3 | * Copyright notice for this file: |
4 | * Copyright (C) 2002 Ben Parnell |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by |
8 | * the Free Software Foundation; either version 2 of the License, or |
9 | * (at your option) any later version. |
10 | * |
11 | * This program is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * GNU General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU General Public License |
17 | * along with this program; if not, write to the Free Software |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | */ |
20 | |
21 | /* Contains file I/O functions that write/read data */ |
22 | /* LSB first. */ |
23 | |
24 | |
25 | #include <stdio.h> |
26 | #include "types.h" |
27 | #include "endian.h" |
28 | |
29 | static uint8 s[4]; |
30 | |
31 | int write16(uint16 b, FILE *fp) |
32 | { |
33 | s[0]=b; |
34 | s[1]=b>>8; |
35 | return((fwrite(s,1,2,fp)<2)?0:2); |
36 | } |
37 | |
38 | int write32(uint32 b, FILE *fp) |
39 | { |
40 | s[0]=b; |
41 | s[1]=b>>8; |
42 | s[2]=b>>16; |
43 | s[3]=b>>24; |
44 | return((fwrite(s,1,4,fp)<4)?0:4); |
45 | } |
46 | |
47 | int read32(void *Bufo, FILE *fp) |
48 | { |
49 | uint32 buf; |
50 | if(fread(&buf,1,4,fp)<4) |
51 | return 0; |
52 | #ifdef LSB_FIRST |
53 | *(uint32*)Bufo=buf; |
54 | #else |
55 | *(uint32*)Bufo=((buf&0xFF)<<24)|((buf&0xFF00)<<8)|((buf&0xFF0000)>>8)|((buf&0xFF000000)>>24); |
56 | #endif |
57 | return 1; |
58 | } |
59 | |
60 | int read16(char *d, FILE *fp) |
61 | { |
62 | #ifdef LSB_FIRST |
63 | return((fread(d,1,2,fp)<2)?0:2); |
64 | #else |
65 | int ret; |
66 | ret=fread(d+1,1,1,fp); |
67 | ret+=fread(d,1,1,fp); |
68 | return ret<2?0:2; |
69 | #endif |
70 | } |
71 | |