mirror of https://github.com/KLayout/klayout.git
177 lines
4.1 KiB
C++
177 lines
4.1 KiB
C++
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/*
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KLayout Layout Viewer
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Copyright (C) 2006-2018 Matthias Koefferlein
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This program 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 2 of the License, or
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(at your option) any later version.
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This program 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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "dbCIF.h"
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#include "dbCIFReader.h"
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#include "dbCIFWriter.h"
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#include "dbStream.h"
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#include "tlClassRegistry.h"
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namespace db
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{
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// ---------------------------------------------------------------
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// CIFDiagnostics implementation
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CIFDiagnostics::~CIFDiagnostics ()
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{
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// .. nothing yet ..
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}
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// ---------------------------------------------------------------
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// CIF format declaration
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class CIFFormatDeclaration
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: public db::StreamFormatDeclaration
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{
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public:
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CIFFormatDeclaration ()
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{
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// .. nothing yet ..
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}
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virtual std::string format_name () const { return "CIF"; }
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virtual std::string format_desc () const { return "CIF"; }
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virtual std::string format_title () const { return "CIF (Caltech interchange format)"; }
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virtual std::string file_format () const { return "CIF files (*.CIF *.cif *.cif.gz *.CIF.gz)"; }
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static tl::Extractor &skip_blanks (tl::Extractor &ex)
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{
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while (! ex.at_end () && *ex != ';' && *ex != '-' && *ex != '(' && *ex != ')' && !isalnum(*ex)) {
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++ex;
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}
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return ex;
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}
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virtual bool detect (tl::InputStream &s) const
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{
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try {
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// analyze the first 4000 characters - this is within the initial block read
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// by the stream and won't trigger a reset of the stream which is not available
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// on some sources.
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std::string head = s.read_all (4000);
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int n = 0;
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tl::Extractor ex (head.c_str ());
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while (! skip_blanks (ex).at_end ()) {
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if (*ex == '(') {
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// read over comments
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++ex;
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int bl = 0;
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while (! ex.at_end () && (*ex != ')' || bl > 0)) {
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// check for nested comments (bl is the nesting level)
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if (*ex == '(') {
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++bl;
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} else if (*ex == ')') {
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--bl;
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}
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++ex;
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}
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if (! ex.at_end ()) {
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++ex;
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}
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} else if (*ex == ';') {
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// ignore ;
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++ex;
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} else if (*ex == 'L') {
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// first command must be "DS num", or "L shortname"
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++ex;
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skip_blanks (ex);
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return ! ex.at_end () && isalnum (*ex);
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} else if (*ex == 'D') {
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// first command must be "DS num", or "L"
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++ex;
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skip_blanks (ex);
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if (ex.at_end () || *ex != 'S') {
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break; // not "D<sep>S"
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}
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++ex;
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skip_blanks (ex);
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if (ex.try_read (n)) {
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return true;
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}
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} else if (*ex == '9') {
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// read over 9...; commands
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++ex;
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while (! ex.at_end () && *ex != ';') {
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++ex;
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}
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if (! ex.at_end ()) {
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++ex;
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}
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} else {
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break;
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}
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}
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} catch (...) {
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// ignore errors
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}
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return false;
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}
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virtual ReaderBase *create_reader (tl::InputStream &s) const
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{
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return new db::CIFReader (s);
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}
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virtual WriterBase *create_writer () const
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{
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return new db::CIFWriter ();
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}
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virtual bool can_read () const
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{
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return true;
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}
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virtual bool can_write () const
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{
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return true;
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}
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};
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static tl::RegisteredClass<db::StreamFormatDeclaration> reader_decl (new CIFFormatDeclaration (), 100, "CIF");
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// provide a symbol to force linking against
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int force_link_CIF = 0;
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}
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