116 lines
3.5 KiB
C++
116 lines
3.5 KiB
C++
/* GRAPHITE2 LICENSING
|
|
|
|
Copyright 2012, SIL International
|
|
All rights reserved.
|
|
|
|
This library is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published
|
|
by the Free Software Foundation; either version 2.1 of License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should also have received a copy of the GNU Lesser General Public
|
|
License along with this library in the file named "LICENSE".
|
|
If not, write to the Free Software Foundation, 51 Franklin Street,
|
|
Suite 500, Boston, MA 02110-1335, USA or visit their web page on the
|
|
internet at http://www.fsf.org/licenses/lgpl.html.
|
|
|
|
Alternatively, the contents of this file may be used under the terms of the
|
|
Mozilla Public License (http://mozilla.org/MPL) or 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.
|
|
*/
|
|
#include <cstring>
|
|
#include "inc/FileFace.h"
|
|
|
|
|
|
#ifndef GRAPHITE2_NFILEFACE
|
|
|
|
using namespace graphite2;
|
|
|
|
FileFace::FileFace(const char *filename)
|
|
: _file(fopen(filename, "rb")),
|
|
_file_len(0),
|
|
_header_tbl(NULL),
|
|
_table_dir(NULL)
|
|
{
|
|
if (!_file) return;
|
|
|
|
if (fseek(_file, 0, SEEK_END)) return;
|
|
_file_len = ftell(_file);
|
|
if (fseek(_file, 0, SEEK_SET)) return;
|
|
|
|
size_t tbl_offset, tbl_len;
|
|
|
|
// Get the header.
|
|
if (!TtfUtil::GetHeaderInfo(tbl_offset, tbl_len)) return;
|
|
if (fseek(_file, long(tbl_offset), SEEK_SET)) return;
|
|
_header_tbl = (TtfUtil::Sfnt::OffsetSubTable*)gralloc<char>(tbl_len);
|
|
if (_header_tbl)
|
|
{
|
|
if (fread(_header_tbl, 1, tbl_len, _file) != tbl_len) return;
|
|
if (!TtfUtil::CheckHeader(_header_tbl)) return;
|
|
}
|
|
|
|
// Get the table directory
|
|
if (!TtfUtil::GetTableDirInfo(_header_tbl, tbl_offset, tbl_len)) return;
|
|
_table_dir = (TtfUtil::Sfnt::OffsetSubTable::Entry*)gralloc<char>(tbl_len);
|
|
if (fseek(_file, long(tbl_offset), SEEK_SET)) return;
|
|
if (_table_dir && fread(_table_dir, 1, tbl_len, _file) != tbl_len)
|
|
{
|
|
free(_table_dir);
|
|
_table_dir = NULL;
|
|
}
|
|
return;
|
|
}
|
|
|
|
FileFace::~FileFace()
|
|
{
|
|
free(_table_dir);
|
|
free(_header_tbl);
|
|
if (_file)
|
|
fclose(_file);
|
|
}
|
|
|
|
|
|
const void *FileFace::get_table_fn(const void* appFaceHandle, unsigned int name, size_t *len)
|
|
{
|
|
if (appFaceHandle == 0) return 0;
|
|
const FileFace & file_face = *static_cast<const FileFace *>(appFaceHandle);
|
|
|
|
void *tbl;
|
|
size_t tbl_offset, tbl_len;
|
|
if (!TtfUtil::GetTableInfo(name, file_face._header_tbl, file_face._table_dir, tbl_offset, tbl_len))
|
|
return 0;
|
|
|
|
if (tbl_offset > file_face._file_len || tbl_len > file_face._file_len - tbl_offset
|
|
|| fseek(file_face._file, long(tbl_offset), SEEK_SET) != 0)
|
|
return 0;
|
|
|
|
tbl = malloc(tbl_len);
|
|
if (!tbl || fread(tbl, 1, tbl_len, file_face._file) != tbl_len)
|
|
{
|
|
free(tbl);
|
|
return 0;
|
|
}
|
|
|
|
if (len) *len = tbl_len;
|
|
return tbl;
|
|
}
|
|
|
|
void FileFace::rel_table_fn(const void* appFaceHandle, const void *table_buffer)
|
|
{
|
|
if (appFaceHandle == 0) return;
|
|
|
|
free(const_cast<void *>(table_buffer));
|
|
}
|
|
|
|
const gr_face_ops FileFace::ops = { sizeof FileFace::ops, &FileFace::get_table_fn, &FileFace::rel_table_fn };
|
|
|
|
|
|
#endif //!GRAPHITE2_NFILEFACE
|