66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
/*
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* This file is subject to the terms of the GFX License. If a copy of
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* the license was not distributed with this file, you can obtain one at:
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*
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* http://ugfx.org/license.html
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*/
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/********************************************************
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* The virtual memory file-system
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********************************************************/
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#include "gfx.h"
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#if GFX_USE_GFILE && GFILE_NEED_MEMFS
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#include "gfile_fs.h"
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#include <string.h>
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static int MEMRead(GFILE *f, void *buf, int size);
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static int MEMWrite(GFILE *f, const void *buf, int size);
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static bool_t MEMSetpos(GFILE *f, long int pos);
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static const GFILEVMT FsMemVMT = {
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GFSFLG_SEEKABLE|GFSFLG_WRITEABLE, // flags
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0, // prefix
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0, 0, 0, 0,
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0, 0, MEMRead, MEMWrite,
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MEMSetpos, 0, 0,
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0, 0, 0,
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#if GFILE_NEED_FILELISTS
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0, 0, 0,
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#endif
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};
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static int MEMRead(GFILE *f, void *buf, int size) {
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memcpy(buf, ((char *)f->obj)+f->pos, size);
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return size;
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}
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static int MEMWrite(GFILE *f, const void *buf, int size) {
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memcpy(((char *)f->obj)+f->pos, buf, size);
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return size;
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}
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static bool_t MEMSetpos(GFILE *f, long int pos) {
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(void) f;
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(void) pos;
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return TRUE;
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}
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GFILE * gfileOpenMemory(void *memptr, const char *mode) {
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GFILE *f;
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// Get an empty file and set the flags
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if (!(f = _gfileFindSlot(mode)))
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return 0;
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// File is open - fill in all the details
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f->vmt = &FsMemVMT;
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f->obj = memptr;
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f->pos = 0;
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f->flags |= GFILEFLG_OPEN|GFILEFLG_CANSEEK;
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return f;
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}
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#endif //GFX_USE_GFILE && GFILE_NEED_MEMFS
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