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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "py/mpconfig.h"
#if MICROPY_FSUSERMOUNT
#include <string.h>
#include "py/mpstate.h"
#if MICROPY_FATFS_OO
#include "lib/oofatfs/ff.h"
#else
#include "lib/fatfs/ff.h"
#endif
#include "extmod/fsusermount.h"
#include "extmod/vfs_fat.h"
STATIC bool check_path(const TCHAR **path, const char *mount_point_str, mp_uint_t mount_point_len) {
if (strncmp(*path, mount_point_str, mount_point_len) == 0) {
if ((*path)[mount_point_len] == '/') {
*path += mount_point_len;
return true;
} else if ((*path)[mount_point_len] == '\0') {
*path = "/";
return true;
}
}
return false;
}
#if MICROPY_FATFS_OO
STATIC fs_user_mount_t *vfs_cur_obj = NULL;
// "path" is the path to lookup; will advance this pointer beyond the volume name.
// Returns a pointer to the VFS object, NULL means path not found.
fs_user_mount_t *ff_get_vfs(const char **path) {
if (!(*path)) {
return NULL;
}
if (**path != '/') {
#if _FS_RPATH
return vfs_cur_obj;
#else
return NULL;
#endif
}
for (size_t i = 0; i < MP_ARRAY_SIZE(MP_STATE_PORT(fs_user_mount)); ++i) {
fs_user_mount_t *vfs = MP_STATE_PORT(fs_user_mount)[i];
if (vfs != NULL && check_path(path, vfs->str, vfs->len)) {
return vfs;
}
}
return NULL;
}
#else
// "path" is the path to lookup; will advance this pointer beyond the volume name.
// Returns logical drive number (-1 means invalid path).
int ff_get_ldnumber (const TCHAR **path) {
if (!(*path)) {
return -1;
}
if (**path != '/') {
#if _FS_RPATH
return ff_CurrVol;
#else
return -1;
#endif
}
for (size_t i = 0; i < MP_ARRAY_SIZE(MP_STATE_PORT(fs_user_mount)); ++i) {
fs_user_mount_t *vfs = MP_STATE_PORT(fs_user_mount)[i];
if (vfs != NULL && check_path(path, vfs->str, vfs->len)) {
return i;
}
}
return -1;
}
void ff_get_volname(BYTE vol, TCHAR **dest) {
fs_user_mount_t *vfs = MP_STATE_PORT(fs_user_mount)[vol];
memcpy(*dest, vfs->str, vfs->len);
*dest += vfs->len;
}
#endif
#endif // MICROPY_FSUSERMOUNT
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