newick.lpp
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上传日期:2007-06-13
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- /* $Id: newick.lpp,v 1000.1 2004/06/01 18:09:30 gouriano Exp $
- * ===========================================================================
- *
- * PUBLIC DOMAIN NOTICE
- * National Center for Biotechnology Information
- *
- * This software/database is a "United States Government Work" under the
- * terms of the United States Copyright Act. It was written as part of
- * the author's official duties as a United States Government employee and
- * thus cannot be copyrighted. This software/database is freely available
- * to the public for use. The National Library of Medicine and the U.S.
- * Government have not placed any restriction on its use or reproduction.
- *
- * Although all reasonable efforts have been taken to ensure the accuracy
- * and reliability of the software and data, the NLM and the U.S.
- * Government do not and cannot warrant the performance or results that
- * may be obtained by using this software or data. The NLM and the U.S.
- * Government disclaim all warranties, express or implied, including
- * warranties of performance, merchantability or fitness for any particular
- * purpose.
- *
- * Please cite the author in any work or product based on this material.
- *
- * ===========================================================================
- *
- * Authors: Josh Cherry
- *
- * File Description: flex lexer for Newick format phylogenetic trees
- *
- */
- /*
- * Meant to be used in conjunction with bison parser defined
- * by newick.ypp. Generate code using (essentially)
- * flex -olex.newick.cpp newick.lpp
- * bison -d -p newick newick.ypp
- * The line '#include <unistd.h>' must be removed from the flex-generated
- * code for it to compile on some platforms.
- */
- %{
- #include <ncbi_pch.hpp>
- #include <string.h>
- #include <util/stream_utils.hpp>
- #include <algo/phy_tree/phy_node.hpp>
- USING_SCOPE(ncbi);
- #include "newick.tab.hpp"
- static string g_Buffer;
- // input from a stream
- extern CNcbiIstream *g_NewickIstr;
- #define YY_INPUT(buf, result, max_size)
- {
- result = CStreamUtils::Readsome(*g_NewickIstr, buf, max_size);
- if (result == 0 && !*g_NewickIstr) {
- result = YY_NULL;
- }
- }
- %}
- %option noyywrap
- %option never-interactive
- %option prefix="newick"
- %s EXPECT_NUM
- %%
- <EXPECT_NUM>[-+]?([0-9]+|([0-9]*.[0-9]+)([eE][-+]?[0-9]+)?) {
- newicklval.dblval = atof(yytext);
- BEGIN 0;
- return NUM;
- }
- [ tn] ;
- [^ tn()[]';:,]+ {
- g_Buffer = yytext;
- for (unsigned int i = 0; i < g_Buffer.size(); ++i) {
- if (g_Buffer[i] == '_') {
- g_Buffer[i] = ' ';
- }
- }
- newicklval.strval = const_cast<char *>(g_Buffer.c_str());
- return LABEL;
- }
- ('[^']*')* {
- g_Buffer.erase();
- g_Buffer.reserve(strlen(yytext));
- for (unsigned int i = 1; i < strlen(yytext) - 1; ++ i) {
- g_Buffer += yytext[i];
- if (yytext[i] == ''') {
- ++i;
- }
- }
- newicklval.strval = const_cast<char *>(g_Buffer.c_str());
- return LABEL;
- }
- : {
- BEGIN EXPECT_NUM;
- return ':';
- }
- . return yytext[0];
- %%
- // Reset the lexer: discard input buffer and enter initial state
- void newick_flex_reset(void)
- {
- newickrestart(0); // flush flex buffer
- BEGIN 0;
- }
- /*
- * ===========================================================================
- * $Log: newick.lpp,v $
- * Revision 1000.1 2004/06/01 18:09:30 gouriano
- * PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R1.4
- *
- * Revision 1.4 2004/05/25 14:42:45 jcherry
- * #include <ncbi_pch.hpp>
- *
- * Revision 1.3 2004/02/12 02:30:35 ucko
- * More portability fixes for newick parser.
- *
- * Revision 1.2 2004/02/11 22:18:16 ucko
- * erase() strings rather than clear()ing them for older compilers' sake.
- *
- * Revision 1.1 2004/02/11 17:40:53 jcherry
- * Initial version
- *
- * ===========================================================================
- */