107 lines
1.6 KiB
C
107 lines
1.6 KiB
C
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
|
|
#include "stream.h"
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "sys-mmap.h"
|
|
|
|
#ifndef O_BINARY
|
|
# define O_BINARY 0
|
|
#endif
|
|
|
|
int stream_open(stream *f, buffer *fn) {
|
|
struct stat st;
|
|
#ifdef HAVE_MMAP
|
|
int fd;
|
|
#elif defined __WIN32
|
|
HANDLE *fh, *mh;
|
|
void *p;
|
|
#endif
|
|
|
|
f->start = NULL;
|
|
|
|
if (-1 == stat(fn->ptr, &st)) {
|
|
return -1;
|
|
}
|
|
|
|
f->size = st.st_size;
|
|
|
|
#ifdef HAVE_MMAP
|
|
if (-1 == (fd = open(fn->ptr, O_RDONLY | O_BINARY))) {
|
|
return -1;
|
|
}
|
|
|
|
f->start = mmap(0, f->size, PROT_READ, MAP_SHARED, fd, 0);
|
|
|
|
close(fd);
|
|
|
|
if (MAP_FAILED == f->start) {
|
|
return -1;
|
|
}
|
|
|
|
#elif defined __WIN32
|
|
fh = CreateFile(fn->ptr,
|
|
GENERIC_READ,
|
|
FILE_SHARE_READ,
|
|
NULL,
|
|
OPEN_EXISTING,
|
|
FILE_ATTRIBUTE_READONLY,
|
|
NULL);
|
|
|
|
if (!fh) return -1;
|
|
|
|
mh = CreateFileMapping( fh,
|
|
NULL,
|
|
PAGE_READONLY,
|
|
(sizeof(off_t) > 4) ? f->size >> 32 : 0,
|
|
f->size & 0xffffffff,
|
|
NULL);
|
|
|
|
if (!mh) {
|
|
LPVOID lpMsgBuf;
|
|
FormatMessage(
|
|
FORMAT_MESSAGE_ALLOCATE_BUFFER |
|
|
FORMAT_MESSAGE_FROM_SYSTEM,
|
|
NULL,
|
|
GetLastError(),
|
|
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
|
|
(LPTSTR) &lpMsgBuf,
|
|
0, NULL );
|
|
|
|
return -1;
|
|
}
|
|
|
|
p = MapViewOfFile(mh,
|
|
FILE_MAP_READ,
|
|
0,
|
|
0,
|
|
0);
|
|
CloseHandle(mh);
|
|
CloseHandle(fh);
|
|
|
|
f->start = p;
|
|
#else
|
|
# error no mmap found
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
int stream_close(stream *f) {
|
|
#ifdef HAVE_MMAP
|
|
if (f->start) munmap(f->start, f->size);
|
|
#elif defined(__WIN32)
|
|
if (f->start) UnmapViewOfFile(f->start);
|
|
#endif
|
|
|
|
f->start = NULL;
|
|
|
|
return 0;
|
|
}
|