137 lines
3.0 KiB
C
137 lines
3.0 KiB
C
/*
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* This file is part of RawTherapee.
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*
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* Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
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*
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* RawTherapee is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* RawTherapee is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with RawTherapee. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _MYFILE_
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#define _MYFILE_
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#include <glib/gstdio.h>
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#include <cstdio>
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#include <cstring>
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#include "rtengine.h"
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struct IMFILE {
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int fd;
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ssize_t pos;
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ssize_t size;
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char* data;
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bool eof;
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rtengine::ProgressListener *plistener;
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double progress_range;
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ssize_t progress_next;
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ssize_t progress_current;
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};
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/*
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Functions for progress bar updates
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Note: progress bar is not intended to be exact, eg if you read same data over and over again progress
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will potentially reach 100% before you're finished.
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*/
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void imfile_set_plistener(IMFILE *f, rtengine::ProgressListener *plistener, double progress_range);
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void imfile_update_progress(IMFILE *f);
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IMFILE* fopen (const char* fname);
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IMFILE* gfopen (const char* fname);
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IMFILE* fopen (unsigned* buf, int size);
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void fclose (IMFILE* f);
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inline int ftell (IMFILE* f)
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{
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return f->pos;
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}
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inline int feof (IMFILE* f)
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{
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return f->eof;
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}
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inline void fseek (IMFILE* f, int p, int how)
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{
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int fpos = f->pos;
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if (how == SEEK_SET) {
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f->pos = p;
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} else if (how == SEEK_CUR) {
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f->pos += p;
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} else if (how == SEEK_END) {
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f->pos = f->size + p;
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}
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if (f->pos < 0 || f->pos > f->size) {
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f->pos = fpos;
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}
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}
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inline int fgetc (IMFILE* f)
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{
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if (f->pos < f->size) {
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if (f->plistener && ++f->progress_current >= f->progress_next) {
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imfile_update_progress(f);
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}
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return (unsigned char)f->data[f->pos++];
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}
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f->eof = true;
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return EOF;
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}
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inline int getc (IMFILE* f)
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{
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return fgetc(f);
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}
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inline int fread (void* dst, int es, int count, IMFILE* f)
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{
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int s = es * count;
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int avail = f->size - f->pos;
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if (s <= avail) {
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memcpy (dst, f->data + f->pos, s);
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f->pos += s;
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if (f->plistener) {
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f->progress_current += s;
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if (f->progress_current >= f->progress_next) {
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imfile_update_progress(f);
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}
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}
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return count;
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} else {
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memcpy (dst, f->data + f->pos, avail);
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f->pos += avail;
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f->eof = true;
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return avail / es;
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}
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}
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inline unsigned char* fdata(int offset, IMFILE* f)
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{
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return (unsigned char*)f->data + offset;
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}
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int fscanf (IMFILE* f, const char* s ...);
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char* fgets (char* s, int n, IMFILE* f);
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#endif
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