summaryrefslogtreecommitdiffstats
path: root/src/constexp.l
diff options
context:
space:
mode:
authormueller <mueller@afe2bf4a-e733-0410-8a33-86f594647bc7>1999-12-15 19:25:10 (GMT)
committermueller <mueller@afe2bf4a-e733-0410-8a33-86f594647bc7>1999-12-15 19:25:10 (GMT)
commit719f0a35063be88eddcc4ed8fe7a940de47ef20c (patch)
treecc1cd70cf5761ddf72ff114c0b65576c3f4c1d2a /src/constexp.l
parentbd30c025c4651ddda467f1af09d4c7ccab397bde (diff)
downloadDoxygen-719f0a35063be88eddcc4ed8fe7a940de47ef20c.zip
Doxygen-719f0a35063be88eddcc4ed8fe7a940de47ef20c.tar.gz
Doxygen-719f0a35063be88eddcc4ed8fe7a940de47ef20c.tar.bz2
initial version
Diffstat (limited to 'src/constexp.l')
-rw-r--r--src/constexp.l110
1 files changed, 110 insertions, 0 deletions
diff --git a/src/constexp.l b/src/constexp.l
new file mode 100644
index 0000000..f023507
--- /dev/null
+++ b/src/constexp.l
@@ -0,0 +1,110 @@
+/******************************************************************************
+ *
+ * $Id$
+ *
+ *
+ * Copyright (C) 1997-1999 by Dimitri van Heesch.
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation under the terms of the GNU General Public License is hereby
+ * granted. No representations are made about the suitability of this software
+ * for any purpose. It is provided "as is" without express or implied warranty.
+ * See the GNU General Public License for more details.
+ *
+ * All output generated with Doxygen is not covered by this license.
+ *
+ */
+
+%{
+
+#include "constexp.h"
+#include "cppvalue.h"
+#include "ce_parse.h" // generated header file
+
+#define YY_NO_UNPUT
+#define YY_NEVER_INTERACTIVE 1
+
+QString strToken;
+
+static const char *inputString;
+static int inputPosition;
+CPPValue resultValue;
+
+#undef YY_INPUT
+#define YY_INPUT(buf,result,max_size) result=yyread(buf,max_size);
+
+static int yyread(char *buf,int max_size)
+{
+ int c=0;
+ while( c < max_size && inputString[inputPosition] )
+ {
+ *buf = inputString[inputPosition++] ;
+ c++; buf++;
+ }
+ return c;
+}
+
+%}
+
+%%
+
+"?" { return TOK_QUESTIONMARK; }
+":" { return TOK_COLON; }
+"||" { return TOK_OR; }
+"&&" { return TOK_AND; }
+"|" { return TOK_BITWISEOR; }
+"^" { return TOK_BITWISEXOR; }
+"&" { return TOK_AMPERSAND; }
+"!=" { return TOK_NOTEQUAL; }
+"==" { return TOK_EQUAL; }
+"<" { return TOK_LESSTHAN; }
+">" { return TOK_GREATERTHAN; }
+"<=" { return TOK_LESSTHANOREQUALTO; }
+">=" { return TOK_GREATERTHANOREQUALTO; }
+"<<" { return TOK_SHIFTLEFT; }
+">>" { return TOK_SHIFTRIGHT; }
+"+" { return TOK_PLUS; }
+"-" { return TOK_MINUS; }
+"*" { return TOK_STAR; }
+"/" { return TOK_DIVIDE; }
+"%" { return TOK_MOD; }
+"~" { return TOK_TILDE; }
+"!" { return TOK_NOT; }
+"(" { return TOK_LPAREN; }
+")" { return TOK_RPAREN; }
+"'"(([^\'\n\r\\]+)|(\\(([ntvbrfa\\?'\"])|([0-9]+)|([xX][0-9a-fA-F]+))))"'" {
+ strToken=yytext;
+ return TOK_CHARACTER;
+ }
+0[0-7]*[uUlL]* { strToken=yytext;
+ return TOK_OCTALINT;
+ }
+[1-9][0-9]*[uUlL]* { strToken=yytext;
+ return TOK_DECIMALINT;
+ }
+(0x|0X)[0-9a-fA-F]+[uUlL]* { strToken=yytext; return TOK_HEXADECIMALINT; }
+(([0-9]+\.[0-9]*)|([0-9]*\.[0-9]+))([eE]([\-\+])?[0-9]+)?([fFlL])? {
+ strToken=yytext; return TOK_FLOAT;
+ }
+([0-9]+[eE])([\-\+])?[0-9]+([fFlL])? {
+ strToken=yytext; return TOK_FLOAT;
+ }
+.
+\n
+
+%%
+
+bool parseCppExpression(const QString &s)
+{
+ //printf("Expression: `%s'\n",s.data());
+ inputString = s;
+ inputPosition = 0;
+ cppExpYYrestart( cppExpYYin );
+ cppExpYYparse();
+ //printf("Result: %ld\n",(long)resultValue);
+ return (long)resultValue!=0;
+}
+
+extern "C" {
+ int cppExpYYwrap() { return 1; }
+}