michael@0: /*  GRAPHITE2 LICENSING
michael@0: 
michael@0:     Copyright 2012, SIL International
michael@0:     All rights reserved.
michael@0: 
michael@0:     This library is free software; you can redistribute it and/or modify
michael@0:     it under the terms of the GNU Lesser General Public License as published
michael@0:     by the Free Software Foundation; either version 2.1 of License, or
michael@0:     (at your option) any later version.
michael@0: 
michael@0:     This program is distributed in the hope that it will be useful,
michael@0:     but WITHOUT ANY WARRANTY; without even the implied warranty of
michael@0:     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
michael@0:     Lesser General Public License for more details.
michael@0: 
michael@0:     You should also have received a copy of the GNU Lesser General Public
michael@0:     License along with this library in the file named "LICENSE".
michael@0:     If not, write to the Free Software Foundation, 51 Franklin Street, 
michael@0:     Suite 500, Boston, MA 02110-1335, USA or visit their web page on the 
michael@0:     internet at http://www.fsf.org/licenses/lgpl.html.
michael@0: 
michael@0: Alternatively, the contents of this file may be used under the terms of the
michael@0: Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public
michael@0: License, as published by the Free Software Foundation, either version 2
michael@0: of the License or (at your option) any later version.
michael@0: */
michael@0: #include <cstring>
michael@0: #include "inc/FileFace.h"
michael@0: 
michael@0: 
michael@0: #ifndef GRAPHITE2_NFILEFACE
michael@0: 
michael@0: using namespace graphite2;
michael@0: 
michael@0: FileFace::FileFace(const char *filename)
michael@0: : _file(fopen(filename, "rb")),
michael@0:   _file_len(0),
michael@0:   _header_tbl(NULL),
michael@0:   _table_dir(NULL)
michael@0: {
michael@0:     if (!_file) return;
michael@0: 
michael@0:     if (fseek(_file, 0, SEEK_END)) return;
michael@0:     _file_len = ftell(_file);
michael@0:     if (fseek(_file, 0, SEEK_SET)) return;
michael@0: 
michael@0:     size_t tbl_offset, tbl_len;
michael@0: 
michael@0:     // Get the header.
michael@0:     if (!TtfUtil::GetHeaderInfo(tbl_offset, tbl_len)) return;
michael@0:     if (fseek(_file, tbl_offset, SEEK_SET)) return;
michael@0:     _header_tbl = (TtfUtil::Sfnt::OffsetSubTable*)gralloc<char>(tbl_len);
michael@0:     if (_header_tbl)
michael@0:     {
michael@0:         if (fread(_header_tbl, 1, tbl_len, _file) != tbl_len) return;
michael@0:         if (!TtfUtil::CheckHeader(_header_tbl)) return;
michael@0:     }
michael@0: 
michael@0:     // Get the table directory
michael@0:     if (!TtfUtil::GetTableDirInfo(_header_tbl, tbl_offset, tbl_len)) return;
michael@0:     _table_dir = (TtfUtil::Sfnt::OffsetSubTable::Entry*)gralloc<char>(tbl_len);
michael@0:     if (fseek(_file, tbl_offset, SEEK_SET)) return;
michael@0:     if (_table_dir)
michael@0:         if (fread(_table_dir, 1, tbl_len, _file) != tbl_len) return;
michael@0: }
michael@0: 
michael@0: FileFace::~FileFace()
michael@0: {
michael@0:     free(_table_dir);
michael@0:     free(_header_tbl);
michael@0:     if (_file)
michael@0:         fclose(_file);
michael@0: }
michael@0: 
michael@0: 
michael@0: const void *FileFace::get_table_fn(const void* appFaceHandle, unsigned int name, size_t *len)
michael@0: {
michael@0:     if (appFaceHandle == 0)     return 0;
michael@0:     const FileFace & file_face = *static_cast<const FileFace *>(appFaceHandle);
michael@0: 
michael@0:     void *tbl;
michael@0:     size_t tbl_offset, tbl_len;
michael@0:     if (!TtfUtil::GetTableInfo(name, file_face._header_tbl, file_face._table_dir, tbl_offset, tbl_len))
michael@0:         return 0;
michael@0: 
michael@0:     if (tbl_offset + tbl_len > file_face._file_len
michael@0:             || fseek(file_face._file, tbl_offset, SEEK_SET) != 0)
michael@0:         return 0;
michael@0: 
michael@0:     tbl = malloc(tbl_len);
michael@0:     if (fread(tbl, 1, tbl_len, file_face._file) != tbl_len)
michael@0:     {
michael@0:         free(tbl);
michael@0:         return 0;
michael@0:     }
michael@0: 
michael@0:     if (len) *len = tbl_len;
michael@0:     return tbl;
michael@0: }
michael@0: 
michael@0: void FileFace::rel_table_fn(const void* appFaceHandle, const void *table_buffer)
michael@0: {
michael@0:     if (appFaceHandle == 0)     return;
michael@0: 
michael@0:     free(const_cast<void *>(table_buffer));
michael@0: }
michael@0: 
michael@0: const gr_face_ops FileFace::ops = { sizeof FileFace::ops, &FileFace::get_table_fn, &FileFace::rel_table_fn };
michael@0: 
michael@0: 
michael@0: #endif                  //!GRAPHITE2_NFILEFACE