source: liacs/da/opdr2b/fileio.cc@ 95

Last change on this file since 95 was 2, checked in by Rick van der Zwet, 15 years ago

Initial import of data of old repository ('data') worth keeping (e.g. tracking
means of URL access statistics)

File size: 1.4 KB
Line 
1/* Author : Rick van der Zwet
2 * S-number : 0433373
3 * Version : $Id: compressie.cc 330 2007-11-25 23:31:30Z rick $
4 * Copyright : FreeBSD Licence
5 */
6#include <stdio.h>
7#include <errno.h>
8#include <stdlib.h>
9#include <sysexits.h>
10
11#include "fileio.h"
12
13
14
15int
16fetchnumber(FILE * input) {
17 static bool odd = true;
18 static int buffer[3];
19 int number;
20
21 if (feof(input))
22 return(FILE_END);
23
24 if (odd == true) {
25 buffer[0] = fgetc(input);
26 buffer[1] = fgetc(input);
27 buffer[2] = fgetc(input);
28 number = (buffer[0] << 4) | (buffer[1] >> 4);
29 odd = false;
30 } else {
31 number = ((buffer[1] & 0xF) << 8) | buffer[2];
32 odd = true;
33 }
34
35 if (number == FILE_END | number == EOF)
36 return(FILE_END);
37
38 return(number);
39}
40
41/* XXX: Check fread/fwrite instead of hacking around like this */
42void
43tofile(FILE * output, const int input) {
44 static int stored = 0;
45 static bool instore = false;
46
47 if (not instore) {
48 stored = input << 12;
49 instore = true;
50 } else {
51 stored = stored | input;
52 fprintf(output,"%c%c%c", ((0x00FF0000 & stored) >> 16),
53 ((0x0000FF00 & stored) >> 8),
54 (0x000000FF & stored));
55 instore = false;
56 }
57}
58
59/* set closing point, to really make sure we hit the end of the file */
60void
61closefile(FILE * output) {
62 tofile(output, FILE_END);
63 tofile(output, FILE_END);
64}
Note: See TracBrowser for help on using the repository browser.