diff options
Diffstat (limited to 'Build/source/libs/graphite2/graphite2-src/src/FileFace.cpp')
-rw-r--r-- | Build/source/libs/graphite2/graphite2-src/src/FileFace.cpp | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/Build/source/libs/graphite2/graphite2-src/src/FileFace.cpp b/Build/source/libs/graphite2/graphite2-src/src/FileFace.cpp new file mode 100644 index 00000000000..43aff71a719 --- /dev/null +++ b/Build/source/libs/graphite2/graphite2-src/src/FileFace.cpp @@ -0,0 +1,111 @@ +/* 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, 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, tbl_offset, SEEK_SET)) return; + if (_table_dir) + if (fread(_table_dir, 1, tbl_len, _file) != tbl_len) 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, tbl_offset, SEEK_SET) != 0) + return 0; + + tbl = malloc(tbl_len); + if (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 |