183 lines
3.4 KiB
C
183 lines
3.4 KiB
C
#include <efs-sdcard.h>
|
|
#include <sys/process.h>
|
|
#include <sys/etimer.h>
|
|
#include <cfs/cfs.h>
|
|
#include <debug-uart.h>
|
|
#include <efs.h>
|
|
#include <ls.h>
|
|
#include <stdio.h>
|
|
|
|
|
|
|
|
process_event_t sdcard_inserted_event;
|
|
|
|
process_event_t sdcard_removed_event;
|
|
|
|
static struct process *event_process = NULL;
|
|
|
|
|
|
#define MAX_FDS 4
|
|
|
|
static File file_descriptors[MAX_FDS];
|
|
|
|
static int
|
|
find_free_fd()
|
|
{
|
|
int fd;
|
|
for (fd = 0; fd < MAX_FDS; fd++) {
|
|
if (!file_getAttr(&file_descriptors[fd], FILE_STATUS_OPEN)) {
|
|
return fd;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static File *
|
|
get_file(int fd)
|
|
{
|
|
if (!sdcard_ready()) return 0;
|
|
if (fd >= MAX_FDS || fd < 0) return NULL;
|
|
if (!file_getAttr(&file_descriptors[fd], FILE_STATUS_OPEN)) return NULL;
|
|
return &file_descriptors[fd];
|
|
}
|
|
|
|
int
|
|
cfs_open (const char *name, int flags)
|
|
{
|
|
eint8 mode;
|
|
int fd;
|
|
if (!sdcard_ready()) return -1;
|
|
fd = find_free_fd();
|
|
if (fd < 0) return -1;
|
|
if (flags == CFS_READ) {
|
|
mode = MODE_READ;
|
|
} else {
|
|
mode = MODE_APPEND;
|
|
}
|
|
if (file_fopen(&file_descriptors[fd], &sdcard_efs.myFs,
|
|
(char*)name, mode) < 0) {
|
|
return -1;
|
|
}
|
|
return fd;
|
|
}
|
|
|
|
void
|
|
cfs_close(int fd)
|
|
{
|
|
File *file = get_file(fd);
|
|
if (!file) return;
|
|
file_fclose(file);
|
|
fs_flushFs(efs_sdcard_get_fs());
|
|
}
|
|
|
|
int
|
|
cfs_read (int fd, void *buf, unsigned int len)
|
|
{
|
|
File *file = get_file(fd);
|
|
if (!file) return 0;
|
|
return file_read(file, len, (euint8*)buf);
|
|
}
|
|
|
|
int
|
|
cfs_write (int fd, const void *buf, unsigned int len)
|
|
{
|
|
File *file = get_file(fd);
|
|
if (!file) return 0;
|
|
return file_write(file, len, (euint8*)buf);
|
|
}
|
|
|
|
cfs_offset_t
|
|
cfs_seek (int fd, cfs_offset_t offset, int whence)
|
|
{
|
|
File *file;
|
|
if (whence != CFS_SEEK_SET) return -1;
|
|
file = get_file(fd);
|
|
if (!file) return 0;
|
|
if (file_setpos(file, offset) != 0) return -1;
|
|
return file->FilePtr;
|
|
}
|
|
|
|
|
|
/* Cause a compile time error if expr is false */
|
|
#ifdef __GNUC__
|
|
#define COMPILE_TIME_CHECK(expr) \
|
|
(void) (__builtin_choose_expr ((expr), 0, ((void)0))+3)
|
|
#else
|
|
#define COMPILE_TIME_CHECK(expr)
|
|
#endif
|
|
|
|
#define MAX_DIR_LISTS 4
|
|
DirList dir_lists[MAX_DIR_LISTS];
|
|
|
|
static DirList *
|
|
find_free_dir_list()
|
|
{
|
|
unsigned int l;
|
|
for(l = 0; l < MAX_DIR_LISTS; l++) {
|
|
if (dir_lists[l].fs == NULL) {
|
|
return &dir_lists[l];
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
int
|
|
cfs_opendir (struct cfs_dir *dirp, const char *name)
|
|
{
|
|
DirList *dirs;
|
|
COMPILE_TIME_CHECK(sizeof(DirList*) <= sizeof(struct cfs_dir));
|
|
if (!sdcard_ready()) return -1;
|
|
dirs = find_free_dir_list();
|
|
if (!dirs) return -1;
|
|
if (ls_openDir(dirs, efs_sdcard_get_fs(), (eint8*)name) != 0) {
|
|
dirs->fs = NULL;
|
|
return -1;
|
|
}
|
|
*(DirList**)dirp = dirs;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
cfs_readdir (struct cfs_dir *dirp, struct cfs_dirent *dirent)
|
|
{
|
|
euint8 *start;
|
|
euint8 *end;
|
|
char *to = dirent->name;
|
|
DirList *dirs = *(DirList**)dirp;
|
|
if (!sdcard_ready()) return 1;
|
|
if (ls_getNext(dirs) != 0) return 1;
|
|
start = dirs->currentEntry.FileName;
|
|
end = start + 7;
|
|
while(end > start) {
|
|
if (*end > ' ') {
|
|
end++;
|
|
break;
|
|
}
|
|
end--;
|
|
}
|
|
while(start < end) {
|
|
*to++ = *start++;
|
|
}
|
|
start = dirs->currentEntry.FileName + 8;
|
|
end = start + 3;
|
|
if (*start > ' ') {
|
|
*to++ = '.';
|
|
*to++ = *start++;
|
|
while(start < end && *start > ' ') {
|
|
*to++ = *start++;
|
|
}
|
|
}
|
|
*to = '\0';
|
|
if (dirs->currentEntry.Attribute & ATTR_DIRECTORY) {
|
|
dirent->size = 0;
|
|
} else {
|
|
dirent->size = dirs->currentEntry.FileSize;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
cfs_closedir (struct cfs_dir *dirp)
|
|
{
|
|
(*(DirList**)dirp)->fs = NULL;
|
|
}
|