64 lines
1.7 KiB
Plaintext
64 lines
1.7 KiB
Plaintext
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/*
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* Copyright (C) 2009 Julien BLACHE <jb@jblache.org>
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*
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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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*
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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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*
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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grammar DAAP;
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options {
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output = AST;
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ASTLabelType = pANTLR3_BASE_TREE;
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language = C;
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}
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query : expr NEWLINE? EOF -> expr
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;
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expr : aexpr (OPOR^ aexpr)*
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;
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aexpr : crit (OPAND^ crit)*
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;
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crit : LPAR expr RPAR -> expr
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| STR
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;
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QUOTE : '\'';
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LPAR : '(';
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RPAR : ')';
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OPAND : '+';
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OPOR : ',';
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NEWLINE : '\r'? '\n';
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/*
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Unescaping adapted from (ported to the C runtime)
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<http://stackoverflow.com/questions/504402/how-to-handle-escape-sequences-in-string-literals-in-antlr-3>
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*/
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STR
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@init{ pANTLR3_STRING unesc = GETTEXT()->factory->newRaw(GETTEXT()->factory); }
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: QUOTE ( reg = ~('\\' | '\'') { unesc->addc(unesc, reg); }
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| esc = ESCAPED { unesc->appendS(unesc, GETTEXT()); } )+ QUOTE { SETTEXT(unesc); };
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fragment
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ESCAPED : '\\'
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( '\\' { SETTEXT(GETTEXT()->factory->newStr8(GETTEXT()->factory, (pANTLR3_UINT8)"\\")); }
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| '\'' { SETTEXT(GETTEXT()->factory->newStr8(GETTEXT()->factory, (pANTLR3_UINT8)"\'")); }
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)
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;
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