1/*****************************************************************************/
2/* */
3/* fileio.c */
4/* */
5/* Binary file I/O for the co65 object file converter */
6/* */
7/* */
8/* */
9/* (C) 1998-2003 Ullrich von Bassewitz */
10/* Römerstrasse 52 */
11/* D-70794 Filderstadt */
12/* EMail: uz@cc65.org */
13/* */
14/* */
15/* This software is provided 'as-is', without any expressed or implied */
16/* warranty. In no event will the authors be held liable for any damages */
17/* arising from the use of this software. */
18/* */
19/* Permission is granted to anyone to use this software for any purpose, */
20/* including commercial applications, and to alter it and redistribute it */
21/* freely, subject to the following restrictions: */
22/* */
23/* 1. The origin of this software must not be misrepresented; you must not */
24/* claim that you wrote the original software. If you use this software */
25/* in a product, an acknowledgment in the product documentation would be */
26/* appreciated but is not required. */
27/* 2. Altered source versions must be plainly marked as such, and must not */
28/* be misrepresented as being the original software. */
29/* 3. This notice may not be removed or altered from any source */
30/* distribution. */
31/* */
32/*****************************************************************************/
33
34
35
36#include <string.h>
37
38/* common */
39#include "xmalloc.h"
40
41/* ld65 */
42#include "error.h"
43#include "fileio.h"
44
45
46
47/*****************************************************************************/
48/* Code */
49/*****************************************************************************/
50
51
52
53unsigned Read8 (FILE* F)
54/* Read an 8 bit value from the file */
55{
56 int C = getc (F);
57 if (C == EOF) {
58 Error ("Read error (file corrupt?)");
59 }
60 return C;
61}
62
63
64
65unsigned Read16 (FILE* F)
66/* Read a 16 bit value from the file */
67{
68 unsigned Lo = Read8 (F);
69 unsigned Hi = Read8 (F);
70 return (Hi << 8) | Lo;
71}
72
73
74
75unsigned long Read24 (FILE* F)
76/* Read a 24 bit value from the file */
77{
78 unsigned long Lo = Read16 (F);
79 unsigned long Hi = Read8 (F);
80 return (Hi << 16) | Lo;
81}
82
83
84
85unsigned long Read32 (FILE* F)
86/* Read a 32 bit value from the file */
87{
88 unsigned long Lo = Read16 (F);
89 unsigned long Hi = Read16 (F);
90 return (Hi << 16) | Lo;
91}
92
93
94
95void* ReadData (FILE* F, void* Data, unsigned Size)
96/* Read data from the file */
97{
98 /* Explicitly allow reading zero bytes */
99 if (Size > 0) {
100 if (fread (Data, 1, Size, F) != Size) {
101 Error ("Read error (file corrupt?)");
102 }
103 }
104 return Data;
105}
106