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/* 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>
#ifdef __WATCOMC__
#ifndef __LINUX__
#include <io.h>
#else
#include <unistd.h>
#endif
#endif
#ifdef __BEOS__
#include <unistd.h>
#endif
#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
#include "filemap.h"
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);
close(fd);
return 0;
}
if (!S_ISREG(sb.st_mode)) {
fprintf(stderr, "%s: not a regular file\n", name);
close(fd);
return 0;
}
nbytes = sb.st_size;
/* malloc will return NULL with nbytes == 0, handle files with size 0 */
if (nbytes == 0) {
static const char c = '\0';
processor(&c, 0, name, arg);
close(fd);
return 1;
}
p = malloc(nbytes);
if (!p) {
fprintf(stderr, "%s: out of memory\n", name);
close(fd);
return 0;
}
n = read(fd, p, nbytes);
if (n < 0) {
perror(name);
free(p);
close(fd);
return 0;
}
if (n != nbytes) {
fprintf(stderr, "%s: read unexpected number of bytes\n", name);
free(p);
close(fd);
return 0;
}
processor(p, nbytes, name, arg);
free(p);
close(fd);
return 1;
}
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