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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.io/license.html
*/
/********************************************************
* The PETITFS file-system
********************************************************/
#include "../../gfx.h"
#if GFX_USE_GFILE && GFILE_NEED_PETITFS
#include "gfile_fs.h"
#include "gfile_petitfs_wrapper.h"
static gBool petitfsExists(const char* fname);
static gBool petitfsOpen(GFILE* f, const char* fname);
static int petitfsRead(GFILE* f, void* buf, int size);
static gBool petitfsSetPos(GFILE* f, gFileSize pos);
#if GFILE_NEED_FILELISTS && _FS_MINIMIZE <= 1
static gfileList *petitfsFlOpen(const char *path, gBool dirs);
static const char *petitfsFlRead(gfileList *pfl);
static void petitfsFlClose(gfileList *pfl);
#endif
const GFILEVMT FsPetitFSVMT = {
GFSFLG_WRITEABLE | GFSFLG_SEEKABLE,
'F',
0,
petitfsExists,
0, // No Filesize
0,
petitfsOpen,
0, // No Close
petitfsRead,
0, // No Write
petitfsSetPos,
0, // No Getsize
0, // No EOF
0, 0, 0, // No Mount, UnMount or Sync
#if GFILE_NEED_FILELISTS
#if _USE_DIR
petitfsFlOpen, petitfsFlRead, petitfsFlClose
#else
0, 0, 0
#endif
#endif
};
// Our directory list structure
typedef struct petitfsList {
gfileList fl; // This must be the first element.
DIR dir;
FILINFO fno;
} petitfsList;
// optimize these later on. Use an array to have multiple
static gBool petitfs_mounted = gFalse;
static FATFS petitfs_fs;
static gBool petitfsExists(const char* fname)
{
// Mount first
if (!petitfs_mounted && pf_mount(&petitfs_fs) != FR_OK)
return gFalse;
// Open
if (pf_open(fname) != FR_OK)
return gFalse;
return gTrue;
}
static gBool petitfsOpen(GFILE* f, const char* fname)
{
// No writing
if ((f->flags & GFILEFLG_WRITE))
return gFalse;
// Mount first
if (!petitfs_mounted && pf_mount(&petitfs_fs) != FR_OK)
return gFalse;
// Open
if (pf_open(fname) != FR_OK)
return gFalse;
f->obj = &petitfs_fs;
return gTrue;
}
static int petitfsRead(GFILE* f, void* buf, int size)
{
int br;
(void) f;
if (pf_read(buf, size, (UINT*)&br) != FR_OK)
return 0;
return br;
}
static gBool petitfsSetPos(GFILE* f, gFileSize pos)
{
(void) f;
return pf_lseek((DWORD)pos) == FR_OK;
}
#if GFILE_NEED_FILELISTS
static gfileList *petitfsFlOpen(const char *path, gBool dirs) {
petitfsList *p;
(void) dirs;
if (!(p = gfxAlloc(sizeof(petitfsList))))
return 0;
if (pf_opendir(&p->dir, path) != FR_OK) {
gfxFree(p);
return 0;
}
return &p->fl;
}
static const char *petitfsFlRead(gfileList *pfl) {
#define ffl ((petitfsList *)pfl)
while(1) {
// Read the next entry
if (pf_readdir(&ffl->dir, &ffl->fno) != FR_OK || !ffl->fno.fname[0])
return 0;
/* Ignore dot entries */
if (ffl->fno.fname[0] == '.') continue;
/* Is it a directory */
if (ffl->fl.dirs) {
if ((ffl->fno.fattrib & AM_DIR))
break;
} else {
if (!(ffl->fno.fattrib & (AM_DIR|AM_HID|AM_SYS)))
break;
}
}
return ffl->fno.fname;
}
static void petitfsFlClose(gfileList *pfl) {
gfxFree(pfl);
}
#endif
#endif //GFX_USE_GFILE && GFILE_NEED_PETITFS
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