added inc and src dir and refactored utility functions
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parent
af2106a48f
commit
6d6ff3e78d
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build/
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@ -1,6 +1,8 @@
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BUILDDIR = build
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TARGET_SRC = main
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OUT = main
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SRC_DIR = src
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INCLUDE_DIR = inc
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build: mkdir main
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all: mkdir main run
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@ -12,15 +14,15 @@ run: # run binary
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./$(BUILDDIR)/main
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main: lex.yy.c yacc.yy.c
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cc $(BUILDDIR)/yacc.yy.c $(BUILDDIR)/lex.yy.c -o $(BUILDDIR)/$(TARGET_SRC) -lfl
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cc -Wall -I$(INCLUDE_DIR) $(SRC_DIR)/extio.c $(BUILDDIR)/yacc.yy.c $(BUILDDIR)/lex.yy.c -o $(BUILDDIR)/$(OUT)
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# generate c file for lex
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lex.yy.c:
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flex -o $(BUILDDIR)/lex.yy.c $(TARGET_SRC).l
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flex -o $(BUILDDIR)/lex.yy.c $(SRC_DIR)/lexer.l
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# generate c file for yacc
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yacc.yy.c:
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yacc -d -o $(BUILDDIR)/yacc.yy.c $(TARGET_SRC).y
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yacc -d -o $(BUILDDIR)/yacc.yy.c $(SRC_DIR)/parser.y
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clean: # wipe the build directory
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rm -f $(BUILDDIR)/*
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#ifndef _EXTIO_H_
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#define _EXTIO_H_
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#include <stdarg.h>
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#include <stdio.h>
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// define different ANSI format strings
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extern const char *DEBUG;
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extern const char *INFO;
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extern const char *WARN;
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extern const char *ERROR;
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/**
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* prints a notification string to standard out
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*/
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int notify(const char *type, const char *format, ...);
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#endif
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@ -1,37 +0,0 @@
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%option noyywrap
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%{
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#include <stdio.h>
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#include "yacc.yy.h"
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#define YYDEBUG 1
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int yyLineNumber = 1;
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%}
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%%
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\n yyLineNumber++;
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0|[1-9][0-9]* return(Number); // integer numbers
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"VAR"|"var" return(Variable);
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"INT"|"int" return(Integer);
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[a-zA-Z]+ return(Ident);
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"," return(',');
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":" return(':');
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";" return(';');
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"+" return('+');
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"-" return('-');
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"(" return('(');
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")" return(')');
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[ \t]
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. print_stdout("unknown Symbol");
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%%
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/*
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int main()
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{
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printf("Programm eingeben: \n");
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yylex();
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return 0;
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}
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*/
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int print_stdout(char token[]) {
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printf("\nFLEX/[INF] >>> Token (%d) AS %s ```%s```\n", yyLineNumber, token, yytext);
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}
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@ -1,28 +0,0 @@
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%{
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#include <stdio.h>
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extern int yylineno;
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%}
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%token Variable
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%token Integer
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%token Ident
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%token Number
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%%
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program: decllist exprlist;
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decllist: decl ';' | decllist decl ';' | /* empty */ | error ';' { yyerror(" im Deklarationsteil\n"); };
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decl: Variable idlist ':' type;
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idlist: Ident | idlist ',' Ident;
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type: Integer;
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exprlist: /* empty */ ;
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%%
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int main() {
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printf("Bitte geben Sie ein Program ein: \n");
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yyparse();
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return 0;
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}
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int yyerror(char *s) {
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printf("YACC/[ERR] >>> Failed parsing grammar (%d): ```%s```", yylineno, s);
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}
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#include "extio.h"
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#define COLORS
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extern int yylineno;
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#ifdef COLORS
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#define NORMAL "\x1b[0m"
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#define GREEN "\33[32m"
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#define RED "\33[31m"
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#define YELLOW "\33[33m"
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#define BLUE "\33[34m"
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#define BOLD "\033[1m"
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#else
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#define NORMAL ""
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#define GREEN ""
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#define RED ""
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#define YELLOW ""
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#define BLUE ""
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#define BOLD ""
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#endif
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// define different ANSI format strings
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const char *DEBUG = GREEN "DEBUG" NORMAL;
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const char *INFO = BLUE "INFO" NORMAL;
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const char *WARN = BOLD "" YELLOW "WARNING" NORMAL;
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const char *ERROR = RED "ERROR" NORMAL;
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int notify(const char *type, const char *format, ...) {
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int char_count = 0;
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// print header
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char_count += printf("%s in line %d: " BOLD, type, yylineno);
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// print formatted variable arguments
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va_list args;
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va_start(args, format);
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char_count += vprintf(format, args);
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va_end(args);
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// print tail
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char_count += printf(NORMAL "\n\torigin: YACC type: SYNTAX\n\n");
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return char_count;
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}
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%option noyywrap
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%{
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#include <stdio.h>
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#include <stdlib.h>
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#include "yacc.yy.h"
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#include "extio.h"
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int yyLineNumber = 1;
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int yylex();
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%}
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%%
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\n yyLineNumber++;
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0|[1-9][0-9]* { yylval.num = atoi(yytext); return(Number); } // integer numbers
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"VAR"|"var" return(Variable);
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"INT"|"int" return(Integer);
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[a-zA-Z]+ { yylval.str = strdup(yytext); return(Ident); }; // FIXME: unfreed heap allocation
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"," return(',');
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":" return(':');
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";" return(';');
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"+" return(Operator);
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"-" return(Operator);
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"*" return(Operator);
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"/" return(Operator);
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"(" return('(');
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")" return(')');
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[ \t]
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. notify(WARN, "unknown Symbol: %s", yytext);
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%%
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%{
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#define COLORS
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#include <stdio.h>
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#include "extio.h"
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extern int yylineno;
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int yyerror(char*);
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int yylex();
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%}
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%union {
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char *str;
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int num;
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}
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%token Variable
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%token Integer
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%token <str> Ident
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%token <num> Number
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%token Operator
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%%
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program: decllist exprlist;
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decllist: decl ';'
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| decllist decl ';'
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| /* empty */ |
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error ';' { notify(ERROR, "in declaration"); };
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decl: Variable idlist ':' type { notify(DEBUG, "declaration found"); };
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idlist: Ident { notify(DEBUG, "identifier found"); };
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| idlist ',' Ident;
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type: Integer { notify(DEBUG, "type found"); };
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exprlist: expr ';' { notify(DEBUG, "expression discovered"); }
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| exprlist expr ';';
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expr: '(' expr Operator expr ')'
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| error expr Operator expr ')' { notify(ERROR, "missing open parenthesis"); }
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| '(' error Operator expr ')' { notify(ERROR, "error in left hand expression"); }
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| '(' expr error expr ')' { notify(ERROR, "expected operator in expression"); }
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| '(' expr Operator error ')' { notify(ERROR, "error in right hand expression"); }
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| '(' expr Operator expr error { notify(ERROR, "missing closing parenthesis"); }
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| Ident { notify(DEBUG, "identifier: %s", $1); }
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| Number { notify(DEBUG, "number: %08x", yyval.num); }
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| error ';' { notify(ERROR, "in expression"); };
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%%
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int main() {
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printf("Bitte geben Sie ein Program ein: \n");
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yyparse();
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return 0;
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}
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int yyerror(char *s) {
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return 0;
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}
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