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ugfx/src/gfile/gfile.c

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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;
};
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);
} 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;
/**
* 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
********************************************************/
#ifndef 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
/********************************************************
* 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 uint16_t mode2flags(const char *mode) {
uint16_t flags;
switch(mode[0]) {
case 'r':
flags = GFILEFLG_READ|GFILEFLG_MUSTEXIST;
while (*++mode) {
switch(mode[0]) {
case '+': flags |= GFILEFLG_WRITE; break;
case 'b': flags |= GFILEFLG_BINARY; break;
}
}
return flags;
case 'w':
flags = GFILEFLG_WRITE|GFILEFLG_TRUNC;
while (*++mode) {
switch(mode[0]) {
case '+': flags |= GFILEFLG_READ; break;
case 'b': flags |= GFILEFLG_BINARY; break;
case 'x': flags |= GFILEFLG_MUSTNOTEXIST; break;
}
}
return flags;
case 'a':
flags = GFILEFLG_WRITE|GFILEFLG_APPEND;
while (*++mode) {
switch(mode[0]) {
case '+': flags |= GFILEFLG_READ; break;
case 'b': flags |= GFILEFLG_BINARY; break;
case 'x': flags |= GFILEFLG_MUSTNOTEXIST; break;
}
}
return flags;
}
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) {
uint16_t flags;
GFILE * f;
const GFILEVMT *p;
// Get the requested mode
if (!(flags = mode2flags(mode)))
return 0;
#if GFILE_ALLOW_DEVICESPECIFIC
if (fname[0] && fname[1] == '|') {
// First find an available GFILE slot.
for (f = gfileArr; f < &gfileArr[GFILE_MAX_GFILES]; f++) {
if (!(f->flags & GFILEFLG_OPEN)) {
// Try to open the file
f->flags = flags;
for(p = FsChain; p; p = p->next) {
if (p->prefix == fname[0])
return testopen(p, f, fname+2) ? f : 0;
}
// File not found
break;
}
}
// No available slot
return 0;
}
#endif
// First find an available GFILE slot.
for (f = gfileArr; f < &gfileArr[GFILE_MAX_GFILES]; f++) {
if (!(f->flags & GFILEFLG_OPEN)) {
// Try to open the file
f->flags = flags;
for(p = FsChain; p; p = p->next) {
if (testopen(p, f, fname))
return f;
}
// File not found
break;
}
}
// No available slot
return 0;
}
#if GFILE_NEED_CHIBIOSFS && GFX_USE_OS_CHIBIOS
GFILE * gfileOpenBaseFileStream(void *BaseFileStreamPtr, 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
if (!(f->flags = mode2flags(mode)))
return 0;
// If we want write but the fs doesn't allow it then return
if ((f->flags & GFILEFLG_WRITE) && !(FsCHIBIOSVMT.flags & GFSFLG_WRITEABLE))
return 0;
// File is open - fill in all the details
f->vmt = &FsCHIBIOSVMT;
f->obj = BaseFileStreamPtr;
f->pos = 0;
f->flags |= GFILEFLG_OPEN|GFILEFLG_CANSEEK;
return f;
}
}
// No available slot
return 0;
}
#endif
#if GFILE_NEED_MEMFS
GFILE * gfileOpenMemory(void *memptr, 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
if (!(f->flags = mode2flags(mode)))
return 0;
// If we want write but the fs doesn't allow it then return
if ((f->flags & GFILEFLG_WRITE) && !(FsMemVMT.flags & GFSFLG_WRITEABLE))
return 0;
// File is open - fill in all the details
f->vmt = &FsMemVMT;
f->obj = memptr;
f->pos = 0;
f->flags |= GFILEFLG_OPEN|GFILEFLG_CANSEEK;
return f;
}
}
// No available slot
return 0;
}
#endif
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);
}
/********************************************************
* String VMT routines
********************************************************/
#if GFILE_NEED_STRINGS && (GFILE_NEED_PRINTG || GFILE_NEED_SCANG)
#include <string.h>
// Special String VMT
static int StringRead(GFILE *f, void *buf, int size) {
// size must be 1 for a complete read
if (!((char *)f->obj)[f->pos])
return 0;
((char *)buf)[0] = ((char *)f->obj)[f->pos];
return 1;
}
static int StringWrite(GFILE *f, const void *buf, int size) {
// size must be 1 for a complete write
((char *)f->obj)[f->pos] = ((char *)buf)[0];
return 1;
}
static const GFILEVMT StringVMT = {
0, // next
0, // flags
'_', // prefix
0, 0, 0, 0,
0, 0, StringRead, StringWrite,
0, 0, 0,
};
#endif
/********************************************************
* printg routines
********************************************************/
#if GFILE_NEED_PRINTG
#include <stdarg.h>
#define MAX_FILLER 11
#define FLOAT_PRECISION 100000
int fnprintg(GFILE *f, int maxlen, const char *fmt, ...) {
int res;
va_list ap;
va_start(ap, fmt);
res = vfnprintg(f, maxlen, fmt, ap);
va_end(ap);
return res;
}
static char *ltoa_wd(char *p, long num, unsigned radix, long divisor) {
int i;
char * q;
if (!divisor) divisor = num;
q = p + MAX_FILLER;
do {
i = (int)(num % radix);
i += '0';
if (i > '9')
i += 'A' - '0' - 10;
*--q = i;
num /= radix;
} while ((divisor /= radix) != 0);
i = (int)(p + MAX_FILLER - q);
do {
*p++ = *q++;
} while (--i);
return p;
}
int vfnprintg(GFILE *f, int maxlen, const char *fmt, va_list arg) {
int ret;
char *p, *s, c, filler;
int i, precision, width;
bool_t is_long, left_align;
long l;
#if GFILE_ALLOW_FLOATS
float f;
char tmpbuf[2*MAX_FILLER + 1];
#else
char tmpbuf[MAX_FILLER + 1];
#endif
ret = 0;
if (maxlen < 0)
return 0;
if (!maxlen)
maxlen = -1;
while (*fmt) {
if (*fmt != '%') {
gfileWrite(f, fmt, 1);
ret++; if (--maxlen) return ret;
fmt++;
continue;
}
fmt++;
p = s = tmpbuf;
left_align = FALSE;
filler = ' ';
width = 0;
precision = 0;
if (*fmt == '-') {
fmt++;
left_align = TRUE;
}
if (*fmt == '.') {
fmt++;
filler = '0';
}
while (1) {
c = *fmt++;
if (c >= '0' && c <= '9')
c -= '0';
else if (c == '*')
c = va_arg(ap, int);
else
break;
width = width * 10 + c;
}
if (c == '.') {
while (1) {
c = *fmt++;
if (c >= '0' && c <= '9')
c -= '0';
else if (c == '*')
c = va_arg(ap, int);
else
break;
precision = precision * 10 + c;
}
}
/* Long modifier.*/
if (c == 'l' || c == 'L') {
is_long = TRUE;
if (*fmt)
c = *fmt++;
}
else
is_long = (c >= 'A') && (c <= 'Z');
/* Command decoding.*/
switch (c) {
case 0:
return ret;
case 'c':
filler = ' ';
*p++ = va_arg(ap, int);
break;
case 's':
filler = ' ';
if ((s = va_arg(ap, char *)) == 0)
s = "(null)";
if (precision == 0)
precision = 32767;
for (p = s; *p && (--precision >= 0); p++);
break;
case 'D':
case 'd':
if (is_long)
l = va_arg(ap, long);
else
l = va_arg(ap, int);
if (l < 0) {
*p++ = '-';
l = -l;
}
p = ltoa_wd(p, l, 10, 0);
break;
#if GFILE_ALLOW_FLOATS
case 'f':
f = (float) va_arg(ap, double);
if (f < 0) {
*p++ = '-';
f = -f;
}
l = f;
p = ltoa_wd(p, l, 10, 0);
*p++ = '.';
l = (f - l) * FLOAT_PRECISION;
p = ltoa_wd(p, l, 10, FLOAT_PRECISION / 10);
break;
#endif
case 'X':
case 'x':
c = 16;
goto unsigned_common;
case 'U':
case 'u':
c = 10;
goto unsigned_common;
case 'O':
case 'o':
c = 8;
unsigned_common:
if (is_long)
l = va_arg(ap, long);
else
l = va_arg(ap, int);
p = ltoa_wd(p, l, c, 0);
break;
default:
*p++ = c;
break;
}
i = (int)(p - s);
if ((width -= i) < 0)
width = 0;
if (left_align == FALSE)
width = -width;
if (width < 0) {
if (*s == '-' && filler == '0') {
gfileWrite(f, s++, 1);
ret++; if (--maxlen) return ret;
i--;
}
do {
gfileWrite(f, &filler, 1);
ret++; if (--maxlen) return ret;
} while (++width != 0);
}
while (--i >= 0) {
gfileWrite(f, s++, 1);
ret++; if (--maxlen) return ret;
}
while (width) {
gfileWrite(f, &filler, 1);
ret++; if (--maxlen) return ret;
width--;
}
}
return ret;
}
#if GFILE_NEED_STRINGS
int snprintg(char *buf, int maxlen, const char *fmt, ...) {
int res;
GFILE f;
va_list ap;
if (maxlen <= 1) {
if (maxlen == 1)
*buf = 0;
return 0;
}
f.flags = GFILEFLG_OPEN|GFILEFLG_WRITE;
f.vmt = &StringVMT;
f.pos = 0;
f.obj = buf;
va_start(ap, fmt);
res = vfnprintg(&f, maxlen-1, fmt, ap);
va_end(ap);
buf[res] = 0;
return res;
}
int vsnprintg(char *buf, int maxlen, const char *fmt, va_list arg) {
int res;
GFILE f;
if (maxlen <= 1) {
if (maxlen == 1)
*buf = 0;
return 0;
}
f.flags = GFILEFLG_OPEN|GFILEFLG_WRITE;
f.vmt = &StringVMT;
f.pos = 0;
f.obj = buf;
res = vfnprintg(&f, maxlen-1, fmt, arg);
buf[res] = 0;
return res;
}
#endif
#endif
/********************************************************
* scang routines
********************************************************/
#if GFILE_NEED_SCANG
int fscang(GFILE *f, const char *fmt, ...) {
int res;
va_list ap;
va_start(ap, fmt);
res = vfscang(f, fmt, ap);
va_end(ap);
return res;
}
int vfscang(GFILE *f, const char *fmt, va_list arg) {
int res, width, size, base;
char c;
bool_t assign;
void *p;
for(res = 0; *fmt; fmt++) {
switch(*fmt) {
case ' ': case '\t': case '\r': case '\n': case '\v': case '\f':
break;
case '%':
fmt++;
assign = TRUE;
width = 0;
size = 1;
if (*fmt == '*') {
fmt++;
assign = FALSE;
}
while(*fmt >= '0' && *fmt <= '9')
width = width * 10 + (*fmt++ - '0');
if (*fmt == 'h') {
fmt++;
size = 0;
} else if (*fmt == 'l') {
fmt++;
size = 2;
} else if (*fmt == 'L') {
fmt++;
size = 3;
}
switch(*fmt) {
case 0:
return res;
case '%':
goto matchchar;
case 'c':
if (!width) {
while(1) {
if (!gfileRead(f, &c, 1)) return res;
switch(c) {
case ' ': case '\t': case '\r':
case '\n': case '\v': case '\f': continue;
}
break;
}
width = 1;
} else {
if (!gfileRead(f, &c, 1)) return res;
}
if (assign) {
p = va_arg(ap, char *);
res++;
*((char *)p)++ = c;
}
while(--width) {
if (!gfileRead(f, &c, 1)) return res;
if (assign) *((char *)p)++ = c;
}
break;
case 's':
while(1) {
if (!gfileRead(f, &c, 1)) return res;
switch(c) {
case ' ': case '\t': case '\r':
case '\n': case '\v': case '\f': continue;
}
break;
}
if (assign) {
p = va_arg(ap, char *);
res++;
*((char *)p)++ = c;
}
if (width) {
while(--width) {
if (!gfileRead(f, &c, 1)) {
if (assign) *((char *)p) = 0;
return res;
}
if (assign) *((char *)p)++ = c;
}
} else {
while(1) {
if (!gfileRead(f, &c, 1)) {
if (assign) *((char *)p) = 0;
return res;
}
switch(c) {
case ' ': case '\t': case '\r':
case '\n': case '\v': case '\f': break;
default:
if (assign) *((char *)p)++ = c;
continue;
}
break;
}
//ungetch(c);
}
if (assign) *((char *)p) = 0;
break;
case 'd':
case 'i':
case 'o':
case 'u':
case 'x':
case 'b':
/*
while (isspace (*buf))
buf++;
if (*s == 'd' || *s == 'u')
base = 10;
else if (*s == 'x')
base = 16;
else if (*s == 'o')
base = 8;
else if (*s == 'b')
base = 2;
if (!width) {
if (isspace (*(s + 1)) || *(s + 1) == 0)
width = strcspn (buf, ISSPACE);
else
width = strchr (buf, *(s + 1)) - buf;
}
strncpy (tmp, buf, width);
tmp[width] = '\0';
buf += width;
if (!noassign)
atob (va_arg (ap, u_int32_t *), tmp, base);
}
if (!noassign)
count++;
*/
#if GFILE_ALLOW_FLOATS
case 'e': case 'f': case 'g':
#endif
default:
return res;
}
break;
default:
matchchar:
while(1) {
if (!gfileRead(f, &c, 1)) return res;
switch(c) {
case ' ': case '\t': case '\r':
case '\n': case '\v': case '\f': continue;
}
break;
}
if (c != *fmt) return res;
break;
}
}
return res;
}
#if GFILE_NEED_STRINGS
int sscang(const char *buf, const char *fmt, ...) {
int res;
GFILE f;
va_list ap;
f.flags = GFILEFLG_OPEN|GFILEFLG_READ;
f.vmt = &StringVMT;
f.pos = 0;
f.obj = buf;
va_start(ap, fmt);
res = vfscang(&f, fmt, ap);
va_end(ap);
return res;
}
int vsscang(const char *buf, const char *fmt, va_list arg) {
int res;
GFILE f;
f.flags = GFILEFLG_OPEN|GFILEFLG_READ;
f.vmt = &StringVMT;
f.pos = 0;
f.obj = buf;
res = vfscang(&f, fmt, arg);
return res;
}
#endif
#endif
/********************************************************
* stdio emulation routines
********************************************************/
#if GFILE_NEED_STDIO
size_t gstdioRead(void * ptr, size_t size, size_t count, FILE *f) {
return gfileRead(f, ptr, size*count)/size;
}
size_t gstdioWrite(const void * ptr, size_t size, size_t count, FILE *f) {
return gfileWrite(f, ptr, size*count)/size;
}
int gstdioSeek(FILE *f, size_t offset, int origin) {
switch(origin) {
case SEEK_SET:
break;
case SEEK_CUR:
offset += f->pos;
break;
case SEEK_END:
offset += gfileGetSize(f);
break;
default:
return -1;
}
return gfileSetPos(f, offset) ? 0 : -1;
}
int gstdioGetpos(FILE *f, long int *pos) {
if (!(f->flags & GFILEFLG_OPEN))
return -1;
*pos = f->pos;
return 0;
}
#endif
#endif /* GFX_USE_GFILE */
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