1 #include <stdio.h>

2 #include <string.h>

3 #include <errno.h>

4 #include "memmap.h"

5

6 #if defined(__unix__) || defined(__APPLE__)

7 #include <unistd.h>

8 #include <fcntl.h>

9 #include <sys/mman.h>

10 #include <sys/stat.h>

11

12 int map_file(struct mmfile *mm, const char *fname)

13 {

14 int fd;

15 struct stat st;

16

17 if((fd = open(fname, O_RDONLY)) == -1) {

18 fprintf(stderr, "map_file: failed to open %s: %s\n", fname, strerror(errno));

19 return -1;

20 }

21 fstat(fd, &st);

22

23 if((mm->ptr = mmap(0, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0)) == (void*)-1) {

24 close(fd);

25 fprintf(stderr, "map_file: failed to map file %s: %s\n", fname, strerror(errno));

26 return -1;

27 }

28 mm->size = st.st_size;

29

30 close(fd);

31 return 0;

32 }

33

34 void unmap_file(struct mmfile *mm)

35 {

36 munmap(mm->ptr, mm->size);

37 }

38

39 #else

40 /* implement on win32 */

41 #endif