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
|
/*
Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
See the file COPYING for copying permission.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#ifndef S_ISREG
#ifndef S_IFREG
#define S_IFREG _S_IFREG
#endif
#ifndef S_IFMT
#define S_IFMT _S_IFMT
#endif
#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
#endif /* not S_ISREG */
#ifndef O_BINARY
#ifdef _O_BINARY
#define O_BINARY _O_BINARY
#else
#define O_BINARY 0
#endif
#endif
int filemap(const char *name,
void (*processor)(const void *, size_t, const char *, void *arg),
void *arg)
{
size_t nbytes;
int fd;
int n;
struct stat sb;
void *p;
fd = open(name, O_RDONLY|O_BINARY);
if (fd < 0) {
perror(name);
return 0;
}
if (fstat(fd, &sb) < 0) {
perror(name);
return 0;
}
if (!S_ISREG(sb.st_mode)) {
fprintf(stderr, "%s: not a regular file\n", name);
return 0;
}
nbytes = sb.st_size;
p = malloc(nbytes);
if (!p) {
fprintf(stderr, "%s: out of memory\n", name);
return 0;
}
n = read(fd, p, nbytes);
if (n < 0) {
perror(name);
close(fd);
return 0;
}
if (n != nbytes) {
fprintf(stderr, "%s: read unexpected number of bytes\n", name);
close(fd);
return 0;
}
processor(p, nbytes, name, arg);
free(p);
close(fd);
return 1;
}
|
