79 lines
1.7 KiB
C
79 lines
1.7 KiB
C
/******************************************************************************
|
|
* MiniFFS : Mini Flat File System
|
|
* file.c: This is the file based implementation of the MiniFFS
|
|
*
|
|
* Copyright (c) 2008-2022 986-Studio. All rights reserved.
|
|
*
|
|
******************************************************************************/
|
|
#ifdef _WIN32
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#else
|
|
#include <sys/mman.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#endif
|
|
|
|
#define __miniffs_internal
|
|
#include <miniffs.h>
|
|
|
|
/* Exported API */
|
|
miniffs_t *miniffs_openfs(char *host_file)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/* Some internal functions */
|
|
void *miniffs_getfileaddr(miniffs_t *fs, fileentry_t *fent)
|
|
{
|
|
|
|
}
|
|
|
|
|
|
size_t host_map_file(char *filename, char **dest)
|
|
{
|
|
char *ret_ptr;
|
|
size_t fileSize;
|
|
#ifdef _WIN32
|
|
/* As windows do not provide an easy to use mmap equivalent, let's use the fallback
|
|
* of opening the file, allocating memory and read the file in the said memory
|
|
*/
|
|
FILE *fp;
|
|
fp = fopen(filename, "rb");
|
|
fseek(fp, 0, SEEK_END);
|
|
fileSize = ftell(fp);
|
|
fseek(fp, 0, SEEK_SET);
|
|
ret_ptr = (char *)calloc(1, fileSize);
|
|
fread(ret_ptr, 1, fileSize, fp);
|
|
fclose(fp);
|
|
#else
|
|
int fd;
|
|
struct stat FileStat;
|
|
|
|
fd = open(filename, O_RDWR);
|
|
fstat(fd, &FileStat);
|
|
ret_ptr = (char *)mmap(NULL, FileStat.st_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
|
|
close(fd);
|
|
fileSize = FileStat.st_size
|
|
if (ret_ptr == MAP_FAILED)
|
|
{
|
|
ret_ptr = NULL;
|
|
}
|
|
#endif
|
|
*dest = ret_ptr;
|
|
return fileSize;
|
|
}
|
|
|
|
void host_unmap_file(char **dest, size_t length)
|
|
{
|
|
#ifdef _WIN32
|
|
/* As for windows we don't mmap, let's just free! */
|
|
free(*dest);
|
|
#else
|
|
munmap(*dest, length);
|
|
#endif
|
|
|
|
*dest = NULL;
|
|
} |