/** => zzip_disk_mmap
*
* This function opens the given archive by name and turn the filehandle
* to => zzip_disk_mmap for bringing it to main memory. If it can not
* be => mmap(2)'ed then we slurp the whole file into a newly => malloc(2)'ed
* memory block. Only if that fails too then we return null. Since handling
* of disk->buffer is ambigous it should not be snatched away please.
*/
zzip__new__ ZZIP_DISK *
zzip_disk_open(char *filename)
{
# ifndef O_BINARY
# define O_BINARY 0
# endif
struct stat st;
if (stat(filename, &st) || ! st.st_size)
return 0;
___ int fd = open(filename, O_RDONLY | O_BINARY);
if (fd <= 0)
return 0;
___ ZZIP_DISK *disk = zzip_disk_mmap(fd);
if (disk)
return disk;
___ zzip_byte_t *buffer = malloc(st.st_size);
if (! buffer)
return 0;
if ((st.st_size == read(fd, buffer, st.st_size)) &&
(disk = zzip_disk_new()))
{
disk->buffer = buffer;
disk->endbuf = buffer + st.st_size;
disk->mapped = -1;
disk->flags |= ZZIP_DISK_FLAGS_OWNED_BUFFER;
} else {
free(buffer);
}
return disk;
____;
____;
____;
}
/** create new diskdir handle.
* wraps underlying zzip_disk_open. */
zzip__new__ ZZIP_MEM_DISK*
zzip_mem_disk_fdopen(int fd)
{
ZZIP_DISK* disk = zzip_disk_mmap(fd);
if (! disk) { perror(error[_zzip_mem_disk_fdopen_fail]); return 0; }
___ ZZIP_MEM_DISK* dir = zzip_mem_disk_new();
zzip_mem_disk_load(dir, disk);
return dir; ____;
}
