1 files changed, 131 insertions, 0 deletions
diff --git a/c_lexer/src/c_lexer.flex b/c_lexer/src/c_lexer.flex
new file mode 100644
index 0000000..c2a42c4
--- /dev/null
+++ b/c_lexer/src/c_lexer.flex
@@ -0,0 +1,131 @@
+%option noyywrap
+
+%{
+
+#include "c_lexer.hpp"
+
+#include <sstream>
+#include <stdlib.h>
+
+int lineCount = 1;
+int spaceCount = 1;
+int sourceLineCount = 1;
+
+std::string fileName;
+
+%}
+
+KEYWORD auto|double|int|struct|break|else|long|switch|case|enum|register|typedef|char|extern|return|union|const|float|short|unsigned|continue|for|signed|void|default|goto|sizeof|volatile|do|if|static|while
+
+IDENTIFIER [_a-zA-Z][_a-zA-Z0-9]*
+
+OPERATOR [.][.][.]|[<>][<>][=]|[-][-]|[+][+]|[|][|]|[#][#]|[&][&]|[+\-*\/<>=!%^|&][=]|[<][<]|[->][>]|[<>&=+\/\-*(){}\[\]\.,%~!?:|^;]
+
+FRACTIONALCONSTANT (([0-9]*\.[0-9]+)|([0-9]+\.))
+EXPONENTPART ([eE][+-]?[0-9]+)
+
+FLOATINGSUFFIX ([flFL])
+INTEGERSUFFIX ([uU][lL]|[lL][uU]|[uUlL])
+
+DECIMALCONSTANT ([1-9][0-9]*)
+OCTALCONSTANT ([0][0-7]*)
+HEXCONSTANT ([0][xX][0-9A-Fa-f]+)
+
+CHARCONSTANT ('(([\\]['])|([^']))+')
+
+STRINGLITERAL ["](([\\]["])|([^"]))*["]
+
+NEWLINE (\r\n?|\n)
+
+WHITESPACE [ ]
+
+TAB \t
+
+PREPROC [#][ ][0-9]+[ ]{STRINGLITERAL}[ 0-9]*
+
+ALL .
+
+%%
+
+{KEYWORD} {
+    yylval = new std::string(yytext);
+    return Keyword;
+}
+
+{IDENTIFIER} {
+    yylval = new std::string(yytext);
+    return Identifier;
+}
+
+{OPERATOR} {
+    yylval = new std::string(yytext);
+    return Operator;
+}
+
+{FRACTIONALCONSTANT}{EXPONENTPART}?{FLOATINGSUFFIX}? {
+    yylval = new std::string(yytext);
+    return Constant;
+}
+
+([0-9]+){EXPONENTPART}{FLOATINGSUFFIX}? {
+    yylval = new std::string(yytext);
+    return Constant;
+}
+
+{HEXCONSTANT}{INTEGERSUFFIX}? {
+    yylval = new std::string(yytext);
+    return Constant;
+}
+
+{DECIMALCONSTANT}{INTEGERSUFFIX}? {
+    yylval = new std::string(yytext);
+    return Constant;
+}
+
+{OCTALCONSTANT}{INTEGERSUFFIX}? {
+    yylval = new std::string(yytext);
+    return Constant;
+}
+
+{CHARCONSTANT} {
+    std::string tmp(yytext);
+    yylval = new std::string(tmp.substr(1, tmp.length()-2));
+    return Constant;
+}
+
+{STRINGLITERAL} {
+    std::string tmp(yytext);
+    yylval = new std::string(tmp.substr(1, tmp.length()-2));
+    return StringLiteral;
+}
+
+{NEWLINE} {
+    spaceCount = 1;
+    lineCount++;
+    sourceLineCount++;
+}
+
+{WHITESPACE} {
+    spaceCount++;
+}
+
+{PREPROC} {
+    int srcLineInt;
+
+    yylval = new std::string(yytext);
+    std::stringstream preProcLine((*yylval).substr(1, (*yylval).length()));
+    preProcLine >> srcLineInt >> fileName;
+    sourceLineCount = srcLineInt - 1;
+    fileName = fileName.substr(1, fileName.length() - 2);
+}
+
+{TAB} {
+    spaceCount += 8;
+}
+
+{ALL} {
+    yylval = new std::string(yytext);
+    return Invalid;
+}
+
+%%