rockbox/apps/plugins/text_viewer/tv_text_reader.c

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 Gilles Roux
* 2003 Garrett Derner
* 2010 Yoshihisa Uchida
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "plugin.h"
#include "tv_pager.h"
#include "tv_reader.h"
#include "tv_text_processor.h"
#include "tv_text_reader.h"
static int get_block;
static bool get_double_blocks;
bool tv_init_text_reader(unsigned char *buf, size_t bufsize, size_t *used_size)
{
size_t size;
if (!tv_init_text_processor(buf, bufsize, used_size))
return false;
size = *used_size;
if (!tv_init_pager(buf + size, bufsize - size, used_size))
return false;
*used_size += size;
return true;
}
void tv_finalize_text_reader(void)
{
tv_finalize_pager();
}
void tv_set_read_conditions(int blocks, int width)
{
tv_set_creation_conditions(blocks, width);
}
off_t tv_get_total_text_size(void)
{
return tv_get_file_size();
}
bool tv_get_next_line(const unsigned char **buf)
{
ssize_t bufsize;
const unsigned char *buffer = tv_get_buffer(&bufsize);
if (bufsize > 0)
{
tv_move_next_line(
tv_create_formed_text(buffer, bufsize, get_block, get_double_blocks, buf));
return true;
}
return false;
}
void tv_read_start(int block, bool is_multi)
{
get_block = block;
get_double_blocks = is_multi;
tv_reset_line_positions();
}
int tv_read_end(void)
{
return tv_get_line_positions(0);
}
void tv_seek_top(void)
{
tv_move_screen(0, 0, SEEK_SET);
}