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