Mirror of :pserver:cvs@cvs.fefe.de:/cvs libowfat https://www.fefe.de/libowfat/
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#include <sys/types.h>
#ifdef _WIN32
#include <windows.h>
#else
#include <unistd.h>
#include <sys/mman.h>
#include "open.h"
#endif
#include "mmap.h"
char* mmap_private(const char* filename,size_t * filesize) {
#ifdef _WIN32
HANDLE fd,m;
char* map;
fd=CreateFile(filename,GENERIC_READ,FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,0,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,0);
if (fd==INVALID_HANDLE_VALUE)
return 0;
m=CreateFileMapping(fd,0,PAGE_WRITECOPY,0,0,NULL);
map=0;
if (m)
if ((map=MapViewOfFile(m,FILE_MAP_COPY,0,0,0)))
*filesize=GetFileSize(fd,NULL);
CloseHandle(m);
CloseHandle(fd);
return map;
#else
int fd=open_read(filename);
char *map;
if (fd>=0) {
register off_t o=lseek(fd,0,SEEK_END);
if (o==0 || (sizeof(off_t)!=sizeof(size_t) && o > (off_t)(size_t)-1)) { close(fd); return 0; }
*filesize=(size_t)o;
map=(char*)mmap(0,*filesize,PROT_READ|PROT_WRITE,MAP_PRIVATE,fd,0);
if (map==(char*)-1)
map=0;
close(fd);
return map;
}
return 0;
#endif
}