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lvgl_cpp/lvgl/extra/libs/fsdrv/lv_fs_win32.c

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/**
* @file lv_fs_win32.c
*
*/
/*********************
* INCLUDES
*********************/
#include "../../../../lvgl/lvgl.h"
#if LV_USE_FS_WIN32 != '\0'
#include <windows.h>
#include <stdio.h>
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static bool is_dots_name(const char * name);
static lv_fs_res_t fs_error_from_win32(DWORD error);
static void * fs_open(lv_fs_drv_t * drv, const char * path, lv_fs_mode_t mode);
static lv_fs_res_t fs_close(lv_fs_drv_t * drv, void * file_p);
static lv_fs_res_t fs_read(lv_fs_drv_t * drv, void * file_p, void * buf, uint32_t btr, uint32_t * br);
static lv_fs_res_t fs_write(lv_fs_drv_t * drv, void * file_p, const void * buf, uint32_t btw, uint32_t * bw);
static lv_fs_res_t fs_seek(lv_fs_drv_t * drv, void * file_p, uint32_t pos, lv_fs_whence_t whence);
static lv_fs_res_t fs_tell(lv_fs_drv_t * drv, void * file_p, uint32_t * pos_p);
static void * fs_dir_open(lv_fs_drv_t * drv, const char * path);
static lv_fs_res_t fs_dir_read(lv_fs_drv_t * drv, void * dir_p, char * fn);
static lv_fs_res_t fs_dir_close(lv_fs_drv_t * drv, void * dir_p);
/**********************
* STATIC VARIABLES
**********************/
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Register a driver for the File system interface
*/
void lv_fs_win32_init(void)
{
/*---------------------------------------------------
* Register the file system interface in LVGL
*--------------------------------------------------*/
/*Add a simple drive to open images*/
static lv_fs_drv_t fs_drv; /*A driver descriptor*/
lv_fs_drv_init(&fs_drv);
/*Set up fields...*/
fs_drv.letter = LV_FS_WIN32_LETTER;
fs_drv.cache_size = LV_FS_WIN32_CACHE_SIZE;
fs_drv.open_cb = fs_open;
fs_drv.close_cb = fs_close;
fs_drv.read_cb = fs_read;
fs_drv.write_cb = fs_write;
fs_drv.seek_cb = fs_seek;
fs_drv.tell_cb = fs_tell;
fs_drv.dir_close_cb = fs_dir_close;
fs_drv.dir_open_cb = fs_dir_open;
fs_drv.dir_read_cb = fs_dir_read;
lv_fs_drv_register(&fs_drv);
}
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Check the dots name
* @param name file or dir name
* @return true if the name is dots name
*/
static bool is_dots_name(const char * name)
{
return name[0] == '.' && (!name[1] || (name[1] == '.' && !name[2]));
}
/**
* Convert Win32 error code to error from lv_fs_res_t enum
* @param error Win32 error code
* @return LV_FS_RES_OK: no error, the file is read
* any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_error_from_win32(DWORD error)
{
lv_fs_res_t res;
switch(error) {
case ERROR_SUCCESS:
res = LV_FS_RES_OK;
break;
case ERROR_BAD_UNIT:
case ERROR_NOT_READY:
case ERROR_CRC:
case ERROR_SEEK:
case ERROR_NOT_DOS_DISK:
case ERROR_WRITE_FAULT:
case ERROR_READ_FAULT:
case ERROR_GEN_FAILURE:
case ERROR_WRONG_DISK:
res = LV_FS_RES_HW_ERR;
break;
case ERROR_INVALID_HANDLE:
case ERROR_INVALID_TARGET_HANDLE:
res = LV_FS_RES_FS_ERR;
break;
case ERROR_FILE_NOT_FOUND:
case ERROR_PATH_NOT_FOUND:
case ERROR_INVALID_DRIVE:
case ERROR_NO_MORE_FILES:
case ERROR_SECTOR_NOT_FOUND:
case ERROR_BAD_NETPATH:
case ERROR_BAD_NET_NAME:
case ERROR_BAD_PATHNAME:
case ERROR_FILENAME_EXCED_RANGE:
res = LV_FS_RES_NOT_EX;
break;
case ERROR_DISK_FULL:
res = LV_FS_RES_FULL;
break;
case ERROR_SHARING_VIOLATION:
case ERROR_LOCK_VIOLATION:
case ERROR_DRIVE_LOCKED:
res = LV_FS_RES_LOCKED;
break;
case ERROR_ACCESS_DENIED:
case ERROR_CURRENT_DIRECTORY:
case ERROR_WRITE_PROTECT:
case ERROR_NETWORK_ACCESS_DENIED:
case ERROR_CANNOT_MAKE:
case ERROR_FAIL_I24:
case ERROR_SEEK_ON_DEVICE:
case ERROR_NOT_LOCKED:
case ERROR_LOCK_FAILED:
res = LV_FS_RES_DENIED;
break;
case ERROR_BUSY:
res = LV_FS_RES_BUSY;
break;
case ERROR_TIMEOUT:
res = LV_FS_RES_TOUT;
break;
case ERROR_NOT_SAME_DEVICE:
case ERROR_DIRECT_ACCESS_HANDLE:
res = LV_FS_RES_NOT_IMP;
break;
case ERROR_TOO_MANY_OPEN_FILES:
case ERROR_ARENA_TRASHED:
case ERROR_NOT_ENOUGH_MEMORY:
case ERROR_INVALID_BLOCK:
case ERROR_OUT_OF_PAPER:
case ERROR_SHARING_BUFFER_EXCEEDED:
case ERROR_NOT_ENOUGH_QUOTA:
res = LV_FS_RES_OUT_OF_MEM;
break;
case ERROR_INVALID_FUNCTION:
case ERROR_INVALID_ACCESS:
case ERROR_INVALID_DATA:
case ERROR_BAD_COMMAND:
case ERROR_BAD_LENGTH:
case ERROR_INVALID_PARAMETER:
case ERROR_NEGATIVE_SEEK:
res = LV_FS_RES_INV_PARAM;
break;
default:
res = LV_FS_RES_UNKNOWN;
break;
}
return res;
}
/**
* Open a file
* @param drv pointer to a driver where this function belongs
* @param path path to the file beginning with the driver letter (e.g. S:/folder/file.txt)
* @param mode read: FS_MODE_RD, write: FS_MODE_WR, both: FS_MODE_RD | FS_MODE_WR
* @return pointer to FIL struct or NULL in case of fail
*/
static void * fs_open(lv_fs_drv_t * drv, const char * path, lv_fs_mode_t mode)
{
LV_UNUSED(drv);
DWORD desired_access = 0;
if(mode & LV_FS_MODE_RD) {
desired_access |= GENERIC_READ;
}
if(mode & LV_FS_MODE_WR) {
desired_access |= GENERIC_WRITE;
}
/*Make the path relative to the current directory (the projects root folder)*/
char buf[MAX_PATH];
lv_snprintf(buf, sizeof(buf), LV_FS_WIN32_PATH "%s", path);
return (void *)CreateFileA(
buf,
desired_access,
FILE_SHARE_READ,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL);
}
/**
* Close an opened file
* @param drv pointer to a driver where this function belongs
* @param file_p pointer to a FILE variable. (opened with fs_open)
* @return LV_FS_RES_OK: no error, the file is read
* any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_close(lv_fs_drv_t * drv, void * file_p)
{
LV_UNUSED(drv);
return CloseHandle((HANDLE)file_p)
? LV_FS_RES_OK
: fs_error_from_win32(GetLastError());
}
/**
* Read data from an opened file
* @param drv pointer to a driver where this function belongs
* @param file_p pointer to a FILE variable.
* @param buf pointer to a memory block where to store the read data
* @param btr number of Bytes To Read
* @param br the real number of read bytes (Byte Read)
* @return LV_FS_RES_OK: no error, the file is read
* any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_read(lv_fs_drv_t * drv, void * file_p, void * buf, uint32_t btr, uint32_t * br)
{
LV_UNUSED(drv);
return ReadFile((HANDLE)file_p, buf, btr, (LPDWORD)br, NULL)
? LV_FS_RES_OK
: fs_error_from_win32(GetLastError());
}
/**
* Write into a file
* @param drv pointer to a driver where this function belongs
* @param file_p pointer to a FILE variable
* @param buf pointer to a buffer with the bytes to write
* @param btw Bytes To Write
* @param bw the number of real written bytes (Bytes Written). NULL if unused.
* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_write(lv_fs_drv_t * drv, void * file_p, const void * buf, uint32_t btw, uint32_t * bw)
{
LV_UNUSED(drv);
return WriteFile((HANDLE)file_p, buf, btw, (LPDWORD)bw, NULL)
? LV_FS_RES_OK
: fs_error_from_win32(GetLastError());
}
/**
* Set the read write pointer. Also expand the file size if necessary.
* @param drv pointer to a driver where this function belongs
* @param file_p pointer to a FILE variable. (opened with fs_open )
* @param pos the new position of read write pointer
* @return LV_FS_RES_OK: no error, the file is read
* any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_seek(lv_fs_drv_t * drv, void * file_p, uint32_t pos, lv_fs_whence_t whence)
{
LV_UNUSED(drv);
DWORD move_method = (DWORD) -1;
if(whence == LV_FS_SEEK_SET) {
move_method = FILE_BEGIN;
}
else if(whence == LV_FS_SEEK_CUR) {
move_method = FILE_CURRENT;
}
else if(whence == LV_FS_SEEK_END) {
move_method = FILE_END;
}
LARGE_INTEGER distance_to_move;
distance_to_move.QuadPart = pos;
return SetFilePointerEx((HANDLE)file_p, distance_to_move, NULL, move_method)
? LV_FS_RES_OK
: fs_error_from_win32(GetLastError());
}
/**
* Give the position of the read write pointer
* @param drv pointer to a driver where this function belongs
* @param file_p pointer to a FILE variable.
* @param pos_p pointer to to store the result
* @return LV_FS_RES_OK: no error, the file is read
* any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_tell(lv_fs_drv_t * drv, void * file_p, uint32_t * pos_p)
{
LV_UNUSED(drv);
if(!pos_p) {
return LV_FS_RES_INV_PARAM;
}
LARGE_INTEGER file_pointer;
file_pointer.QuadPart = 0;
LARGE_INTEGER distance_to_move;
distance_to_move.QuadPart = 0;
if(SetFilePointerEx(
(HANDLE)file_p,
distance_to_move,
&file_pointer,
FILE_CURRENT)) {
if(file_pointer.QuadPart > LONG_MAX) {
return LV_FS_RES_INV_PARAM;
}
else {
*pos_p = file_pointer.LowPart;
return LV_FS_RES_OK;
}
}
else {
return fs_error_from_win32(GetLastError());
}
}
static char next_fn[256];
static lv_fs_res_t next_error = LV_FS_RES_OK;
/**
* Initialize a 'DIR' or 'HANDLE' variable for directory reading
* @param drv pointer to a driver where this function belongs
* @param path path to a directory
* @return pointer to an initialized 'DIR' or 'HANDLE' variable
*/
static void * fs_dir_open(lv_fs_drv_t * drv, const char * path)
{
LV_UNUSED(drv);
HANDLE d = INVALID_HANDLE_VALUE;
WIN32_FIND_DATAA fdata;
/*Make the path relative to the current directory (the projects root folder)*/
char buf[256];
#ifdef LV_FS_WIN32_PATH
lv_snprintf(buf, sizeof(buf), LV_FS_WIN32_PATH "%s\\*", path);
#else
lv_snprintf(buf, sizeof(buf), "%s\\*", path);
#endif
strcpy(next_fn, "");
d = FindFirstFileA(buf, &fdata);
do {
if(is_dots_name(fdata.cFileName)) {
continue;
}
else {
if(fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
sprintf(next_fn, "/%s", fdata.cFileName);
}
else {
sprintf(next_fn, "%s", fdata.cFileName);
}
break;
}
} while(FindNextFileA(d, &fdata));
next_error = fs_error_from_win32(GetLastError());
return d;
}
/**
* Read the next filename from a directory.
* The name of the directories will begin with '/'
* @param drv pointer to a driver where this function belongs
* @param dir_p pointer to an initialized 'DIR' or 'HANDLE' variable
* @param fn pointer to a buffer to store the filename
* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_dir_read(lv_fs_drv_t * drv, void * dir_p, char * fn)
{
LV_UNUSED(drv);
strcpy(fn, next_fn);
lv_fs_res_t current_error = next_error;
next_error = LV_FS_RES_OK;
strcpy(next_fn, "");
WIN32_FIND_DATAA fdata;
while(FindNextFileA(dir_p, &fdata)) {
if(is_dots_name(fdata.cFileName)) {
continue;
}
else {
if(fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
sprintf(next_fn, "/%s", fdata.cFileName);
}
else {
sprintf(next_fn, "%s", fdata.cFileName);
}
break;
}
}
if(next_fn[0] == '\0') {
next_error = fs_error_from_win32(GetLastError());
}
return current_error;
}
/**
* Close the directory reading
* @param drv pointer to a driver where this function belongs
* @param dir_p pointer to an initialized 'DIR' or 'HANDLE' variable
* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
*/
static lv_fs_res_t fs_dir_close(lv_fs_drv_t * drv, void * dir_p)
{
LV_UNUSED(drv);
return FindClose((HANDLE)dir_p)
? LV_FS_RES_OK
: fs_error_from_win32(GetLastError());
}
#else /*LV_USE_FS_WIN32 == 0*/
#if defined(LV_FS_WIN32_LETTER) && LV_FS_WIN32_LETTER != '\0'
#warning "LV_USE_FS_WIN32 is not enabled but LV_FS_WIN32_LETTER is set"
#endif
#endif
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