add: 添加vfs for fatfs的占位文件, 待真正实现之

luat/vfs/luat_fs_fatfs.c

@@ -0,0 +1,124 @@
+
+#include "luat_base.h"
+#include "luat_fs.h"
+
+#ifdef LUAT_VFS_USE_FATFS
+
+#error "no complete yet"
+// 参考 luat_lib_fatfs 里面操作fatfs的方法, 实现vfs封装.
+
+#include "ff.h"
+#include "diskio.h"
+
+extern FATFS *fs;
+
+FILE* luat_vfs_fatfs_fopen(void* userdata, const char *filename, const char *mode) {
+    //LLOGD("fopen %s %s", filename + (filename[0] == '/' ? 1 : 0), mode);
+    return fopen(filename + (filename[0] == '/' ? 1 : 0), mode);
+}
+
+int luat_vfs_fatfs_getc(void* userdata, FILE* stream) {
+    //LLOGD("posix_getc %p", stream);
+    return getc(stream);
+}
+
+int luat_vfs_fatfs_fseek(void* userdata, FILE* stream, long int offset, int origin) {
+    return fseek(stream, offset, origin);
+}
+
+int luat_vfs_fatfs_ftell(void* userdata, FILE* stream) {
+    return ftell(stream);
+}
+
+int luat_vfs_fatfs_fclose(void* userdata, FILE* stream) {
+    return fclose(stream);
+}
+int luat_vfs_fatfs_feof(void* userdata, FILE* stream) {
+    return feof(stream);
+}
+int luat_vfs_fatfs_ferror(void* userdata, FILE *stream) {
+    return ferror(stream);
+}
+size_t luat_vfs_fatfs_fread(void* userdata, void *ptr, size_t size, size_t nmemb, FILE *stream) {
+    
+    return fread(ptr, size, nmemb, stream);
+}
+size_t luat_vfs_fatfs_fwrite(void* userdata, const void *ptr, size_t size, size_t nmemb, FILE *stream) {
+    return fwrite(ptr, size, nmemb, stream);
+}
+int luat_vfs_fatfs_remove(void* userdata, const char *filename) {
+    return remove(filename + (filename[0] == '/' ? 1 : 0));
+}
+int luat_vfs_fatfs_rename(void* userdata, const char *old_filename, const char *new_filename) {
+    return rename(old_filename + (old_filename[0] == '/' ? 1 : 0), new_filename + (new_filename[0] == '/' ? 1 : 0));
+}
+
+int luat_vfs_fatfs_fexist(void* userdata, const char *filename) {
+    FILE* fd = luat_vfs_fatfs_fopen(userdata, filename, "rb");
+    if (fd) {
+        luat_vfs_fatfs_fclose(userdata, fd);
+        return 1;
+    }
+    return 0;
+}
+
+size_t luat_vfs_fatfs_fsize(void* userdata, const char *filename) {
+    FILE *fd;
+    size_t size = 0;
+    fd = luat_vfs_fatfs_fopen(userdata, filename, "rb");
+    if (fd) {
+        luat_vfs_fatfs_fseek(userdata, fd, 0, SEEK_END);
+        size = luat_vfs_fatfs_ftell(userdata, fd); 
+        luat_vfs_fatfs_fclose(userdata, fd);
+    }
+    return size;
+}
+
+int luat_vfs_fatfs_mkfs(void* userdata, luat_fs_conf_t *conf) {
+    LLOGE("not support yet : mkfs");
+    return -1;
+}
+int luat_vfs_fatfs_mount(void** userdata, luat_fs_conf_t *conf) {
+    //LLOGE("not support yet : mount");
+    return 0;
+}
+int luat_vfs_fatfs_umount(void* userdata, luat_fs_conf_t *conf) {
+    //LLOGE("not support yet : umount");
+    return 0;
+}
+
+int luat_vfs_fatfs_mkdir(void* userdata, char const* _DirName) {
+    return mkdir(_DirName);
+}
+int luat_vfs_fatfs_rmdir(void* userdata, char const* _DirName) {
+    return rmdir(_DirName);
+}
+
+#define T(name) .name = luat_vfs_fatfs_##name
+const struct luat_vfs_filesystem vfs_fs_fatfs = {
+    .name = "fatfs",
+    .opts = {
+        T(mkfs),
+        T(mount),
+        T(umount),
+        T(mkdir),
+        T(rmdir),
+        T(remove),
+        T(rename),
+        T(fsize),
+        T(fexist)
+    },
+    .fopts = {
+        T(fopen),
+        T(getc),
+        T(fseek),
+        T(ftell),
+        T(fclose),
+        T(feof),
+        T(ferror),
+        T(fread),
+        T(fwrite)
+    }
+};
+
+#endif