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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.org/license.html
*/
/**
* @file src/gfile/gfile.c
* @brief GFILE code.
*
*/
#define GFILE_IMPLEMENTATION
#include "gfx.h"
#if GFX_USE_GFILE
struct GFILE {
const struct GFILEVMT * vmt;
uint16_t flags;
#define GFILEFLG_OPEN 0x0001 // File is open
#define GFILEFLG_READ 0x0002 // Read the file
#define GFILEFLG_WRITE 0x0004 // Write the file
#define GFILEFLG_APPEND 0x0008 // Append on each write
#define GFILEFLG_BINARY 0x0010 // Treat as a binary file
#define GFILEFLG_DELONCLOSE 0x0020 // Delete on close
#define GFILEFLG_CANSEEK 0x0040 // Seek operations are valid
#define GFILEFLG_FAILONBLOCK 0x0080 // Fail on a blocking call
#define GFILEFLG_MUSTEXIST 0x0100 // On open file must exist
#define GFILEFLG_MUSTNOTEXIST 0x0200 // On open file must not exist
#define GFILEFLG_TRUNC 0x0400 // On open truncate the file
void * obj;
long int pos;
};
struct gfileList {
const struct GFILEVMT * vmt;
bool_t dirs;
};
typedef struct GFILEVMT {
const struct GFILEVMT * next;
uint8_t flags;
#define GFSFLG_WRITEABLE 0x0001
#define GFSFLG_CASESENSITIVE 0x0002
#define GFSFLG_SEEKABLE 0x0004
#define GFSFLG_FAST 0x0010
#define GFSFLG_SMALL 0x0020
#define GFSFLG_TEXTMODES 0x0040
char prefix;
bool_t (*del) (const char *fname);
bool_t (*exists) (const char *fname);
long int (*filesize) (const char *fname);
bool_t (*ren) (const char *oldname, const char *newname);
bool_t (*open) (GFILE *f, const char *fname);
void (*close) (GFILE *f);
int (*read) (GFILE *f, void *buf, int size);
int (*write) (GFILE *f, const void *buf, int size);
bool_t (*setpos) (GFILE *f, long int pos);
long int (*getsize) (GFILE *f);
bool_t (*eof) (GFILE *f);
bool_t (*mount) (const char *drive);
bool_t (*unmount) (const char *drive);
bool_t (*sync) (GFILE *f);
#if GFILE_NEED_FILELISTS
gfileList * (*flopen) (const char *path, bool_t dirs);
const char *(*flread) (gfileList *pfl);
void (*flclose) (gfileList *pfl);
#endif
} GFILEVMT;
// The chain of FileSystems
#define GFILE_CHAINHEAD 0
// The table of GFILE's
static GFILE gfileArr[GFILE_MAX_GFILES];
GFILE *gfileStdIn;
GFILE *gfileStdOut;
GFILE *gfileStdErr;
// Forward definition used by some special open calls
static GFILE *findemptyfile(const char *mode);
/**
* The order of the file-systems below determines the order
* that they are searched to find a file.
* The last defined is the first searched.
*/
/********************************************************
* The ChibiOS BaseFileStream VMT
********************************************************/
#if GFILE_NEED_CHIBIOSFS && GFX_USE_OS_CHIBIOS
#include "src/gfile/inc_chibiosfs.c"
#endif
/********************************************************
* The Memory Pointer VMT
********************************************************/
#if GFILE_NEED_MEMFS
#include "src/gfile/inc_memfs.c"
#endif
/********************************************************
* The RAM file-system VMT
********************************************************/
#if GFILE_NEED_RAMFS
#include "src/gfile/inc_ramfs.c"
#endif
/********************************************************
* The FAT file-system VMT
********************************************************/
#if GFILE_NEED_FATFS
#include "src/gfile/inc_fatfs.c"
#endif
/********************************************************
* The native file-system
********************************************************/
#if GFILE_NEED_NATIVEFS
#include "src/gfile/inc_nativefs.c"
#endif
/********************************************************
* The ROM file-system VMT
********************************************************/
#if GFILE_NEED_ROMFS
#include "src/gfile/inc_romfs.c"
#endif
/********************************************************
* The virtual string file VMT
********************************************************/
#if GFILE_NEED_STRINGS
#include "src/gfile/inc_strings.c"
#endif
/********************************************************
* Printg Routines
********************************************************/
#if GFILE_NEED_PRINTG
#include "src/gfile/inc_printg.c"
#endif
/********************************************************
* Scang Routines
********************************************************/
#if GFILE_NEED_SCANG
#include "src/gfile/inc_scang.c"
#endif
/********************************************************
* Stdio Emulation Routines
********************************************************/
#if GFILE_NEED_STDIO
#include "src/gfile/inc_stdio.c"
#endif
/********************************************************
* IO routines
********************************************************/
/**
* The chain of file systems.
*/
static const GFILEVMT const * FsChain = GFILE_CHAINHEAD;
/**
* The init routine
*/
void _gfileInit(void) {
#if GFILE_NEED_NATIVEFS
NativeStdIn.flags = GFILEFLG_OPEN|GFILEFLG_READ;
NativeStdIn.vmt = &FsNativeVMT;
NativeStdIn.obj = (void *)stdin;
NativeStdIn.pos = 0;
gfileStdIn = &NativeStdIn;
NativeStdOut.flags = GFILEFLG_OPEN|GFILEFLG_WRITE|GFILEFLG_APPEND;
NativeStdOut.vmt = &FsNativeVMT;
NativeStdOut.obj = (void *)stdout;
NativeStdOut.pos = 0;
gfileStdOut = &NativeStdOut;
NativeStdErr.flags = GFILEFLG_OPEN|GFILEFLG_WRITE|GFILEFLG_APPEND;
NativeStdErr.vmt = &FsNativeVMT;
NativeStdErr.obj = (void *)stderr;
NativeStdErr.pos = 0;
gfileStdErr = &NativeStdErr;
#endif
}
void _gfileDeinit(void)
{
/* ToDo */
}
bool_t gfileExists(const char *fname) {
const GFILEVMT *p;
#if GFILE_ALLOW_DEVICESPECIFIC
if (fname[0] && fname[1] == '|') {
for(p = FsChain; p; p = p->next) {
if (p->prefix == fname[0])
return p->exists && p->exists(fname+2);
}
return FALSE;
}
#endif
for(p = FsChain; p; p = p->next) {
if (p->exists && p->exists(fname))
return TRUE;
}
return FALSE;
}
bool_t gfileDelete(const char *fname) {
const GFILEVMT *p;
#if GFILE_ALLOW_DEVICESPECIFIC
if (fname[0] && fname[1] == '|') {
for(p = FsChain; p; p = p->next) {
if (p->prefix == fname[0])
return p->del && p->del(fname+2);
}
return FALSE;
}
#endif
for(p = FsChain; p; p = p->next) {
if (p->del && p->del(fname))
return TRUE;
}
return FALSE;
}
long int gfileGetFilesize(const char *fname) {
const GFILEVMT *p;
long int res;
#if GFILE_ALLOW_DEVICESPECIFIC
if (fname[0] && fname[1] == '|') {
for(p = FsChain; p; p = p->next) {
if (p->prefix == fname[0])
return p->filesize ? p->filesize(fname+2) : -1;
}
return -1;
}
#endif
for(p = FsChain; p; p = p->next) {
if (p->filesize && (res = p->filesize(fname)) != -1)
return res;
}
return -1;
}
bool_t gfileRename(const char *oldname, const char *newname) {
const GFILEVMT *p;
#if GFILE_ALLOW_DEVICESPECIFIC
if ((oldname[0] && oldname[1] == '|') || (newname[0] && newname[1] == '|')) {
char ch;
if (oldname[0] && oldname[1] == '|') {
ch = oldname[0];
oldname += 2;
if (newname[0] && newname[1] == '|') {
if (newname[0] != ch)
// Both oldname and newname are fs specific but different ones.
return FALSE;
newname += 2;
}
} else {
ch = newname[0];
newname += 2;
}
for(p = FsChain; p; p = p->next) {
if (p->prefix == ch)
return p->ren && p->ren(oldname, newname);
}
return FALSE;
}
#endif
for(p = FsChain; p; p = p->next) {
if (p->ren && p->ren(oldname,newname))
return TRUE;
}
return FALSE;
}
static GFILE *findemptyfile(const char *mode) {
GFILE * f;
// First find an available GFILE slot.
for (f = gfileArr; f < &gfileArr[GFILE_MAX_GFILES]; f++) {
if (!(f->flags & GFILEFLG_OPEN)) {
// Get the flags
switch(mode[0]) {
case 'r':
f->flags = GFILEFLG_READ|GFILEFLG_MUSTEXIST;
while (*++mode) {
switch(mode[0]) {
case '+': f->flags |= GFILEFLG_WRITE; break;
case 'b': f->flags |= GFILEFLG_BINARY; break;
}
}
break;
case 'w':
f->flags = GFILEFLG_WRITE|GFILEFLG_TRUNC;
while (*++mode) {
switch(mode[0]) {
case '+': f->flags |= GFILEFLG_READ; break;
case 'b': f->flags |= GFILEFLG_BINARY; break;
case 'x': f->flags |= GFILEFLG_MUSTNOTEXIST; break;
}
}
break;
case 'a':
f->flags = GFILEFLG_WRITE|GFILEFLG_APPEND;
while (*++mode) {
switch(mode[0]) {
case '+': f->flags |= GFILEFLG_READ; break;
case 'b': f->flags |= GFILEFLG_BINARY; break;
case 'x': f->flags |= GFILEFLG_MUSTNOTEXIST; break;
}
}
break;
default:
return 0;
}
return f;
}
}
return 0;
}
static bool_t testopen(const GFILEVMT *p, GFILE *f, const char *fname) {
// If we want write but the fs doesn't allow it then return
if ((f->flags & GFILEFLG_WRITE) && !(p->flags & GFSFLG_WRITEABLE))
return FALSE;
// Try to open
if (!p->open || !p->open(f, fname))
return FALSE;
// File is open - fill in all the details
f->vmt = p;
f->pos = 0;
f->flags |= GFILEFLG_OPEN;
if (p->flags & GFSFLG_SEEKABLE)
f->flags |= GFILEFLG_CANSEEK;
return TRUE;
}
GFILE *gfileOpen(const char *fname, const char *mode) {
GFILE * f;
const GFILEVMT *p;
// Get an empty file and set the flags
if (!(f = findemptyfile(mode)))
return 0;
#if GFILE_ALLOW_DEVICESPECIFIC
if (fname[0] && fname[1] == '|') {
for(p = FsChain; p; p = p->next) {
if (p->prefix == fname[0])
return testopen(p, f, fname+2) ? f : 0;
}
// File not found
return 0;
}
#endif
for(p = FsChain; p; p = p->next) {
if (testopen(p, f, fname))
return f;
}
// File not found
return 0;
}
void gfileClose(GFILE *f) {
if (!f || !(f->flags & GFILEFLG_OPEN))
return;
if (f->vmt->close)
f->vmt->close(f);
f->flags = 0;
}
size_t gfileRead(GFILE *f, void *buf, size_t len) {
size_t res;
if (!f || (f->flags & (GFILEFLG_OPEN|GFILEFLG_READ)) != (GFILEFLG_OPEN|GFILEFLG_READ))
return 0;
if (!f->vmt->read)
return 0;
if ((res = f->vmt->read(f, buf, len)) <= 0)
return 0;
f->pos += res;
return res;
}
size_t gfileWrite(GFILE *f, const void *buf, size_t len) {
size_t res;
if (!f || (f->flags & (GFILEFLG_OPEN|GFILEFLG_WRITE)) != (GFILEFLG_OPEN|GFILEFLG_WRITE))
return 0;
if (!f->vmt->write)
return 0;
if ((res = f->vmt->write(f, buf, len)) <= 0)
return 0;
f->pos += res;
return res;
}
long int gfileGetPos(GFILE *f) {
if (!f || !(f->flags & GFILEFLG_OPEN))
return 0;
return f->pos;
}
bool_t gfileSetPos(GFILE *f, long int pos) {
if (!f || !(f->flags & GFILEFLG_OPEN))
return FALSE;
if (!f->vmt->setpos || !f->vmt->setpos(f, pos))
return FALSE;
f->pos = pos;
return TRUE;
}
long int gfileGetSize(GFILE *f) {
if (!f || !(f->flags & GFILEFLG_OPEN))
return 0;
if (!f->vmt->getsize)
return 0;
return f->vmt->getsize(f);
}
bool_t gfileEOF(GFILE *f) {
if (!f || !(f->flags & GFILEFLG_OPEN))
return TRUE;
if (!f->vmt->eof)
return FALSE;
return f->vmt->eof(f);
}
bool_t gfileMount(char fs, const char* drive) {
const GFILEVMT *p;
// Find the correct VMT
for(p = FsChain; p; p = p->next) {
if (p->prefix == fs) {
if (!p->mount)
return FALSE;
return p->mount(drive);
}
}
return FALSE;
}
bool_t gfileUnmount(char fs, const char* drive) {
const GFILEVMT *p;
// Find the correct VMT
for(p = FsChain; p; p = p->next) {
if (p->prefix == fs) {
if (!p->mount)
return FALSE;
return p->unmount(drive);
}
}
return FALSE;
}
bool_t gfileSync(GFILE *f) {
if (!f->vmt->sync)
return FALSE;
return f->vmt->sync(f);
}
#if GFILE_NEED_FILELISTS
gfileList *gfileOpenFileList(char fs, const char *path, bool_t dirs) {
const GFILEVMT *p;
gfileList * pfl;
// Find the correct VMT
for(p = FsChain; p; p = p->next) {
if (p->prefix == fs) {
if (!p->flopen)
return 0;
pfl = p->flopen(path, dirs);
if (pfl) {
pfl->vmt = p;
pfl->dirs = dirs;
}
return pfl;
}
}
return 0;
}
const char *gfileReadFileList(gfileList *pfl) {
return pfl->vmt->flread ? pfl->vmt->flread(pfl) : 0;
}
void gfileCloseFileList(gfileList *pfl) {
if (pfl->vmt->flclose)
pfl->vmt->flclose(pfl);
}
#endif
#endif /* GFX_USE_GFILE */
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