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basic scanner for marshaller

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overflowerror 2021-05-02 19:52:07 +02:00
parent ef08e3688d
commit f3fead6349
2 changed files with 87 additions and 0 deletions
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23
marshaller/Makefile Normal file
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LEX = flex
YACC = bison
YFLAGS = -y -d
CC = gcc
LD = gcc
BIN_NAME = marshaller
marshaller: gen/lex.yy.c gen/y.tab.c
$(CC) -o $@ $^
gen/y.tab.c gen/y.tab.h: src/parser.y
$(YACC) $(YFLAGS) $<
mv src/y.tab.c gen/
mv src/y.tab.h gen/
gen/lex.yy.c: src/scanner.l gen/y.tab.h
$(LEX) $<
mv src/lex.yy.c gen/
clean:
rm -f gen/* $(BIN_NAME)

64
marshaller/src/scanner.l Normal file
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whitespace [\n\t\n ]
id [a-zA-Z_][a-zA-Z0-9_]*
dec [0-9]+
hex [0-9a-fA-F]+H
number {dec}|{hex}
int_types "short"|"byte"|"int"|"long"|"long long"
unsigned_int_types "unsigend "{int_types}
signed_int_types "signed "{int_types}
stdint_types_u "uint8_t"|"uint16_t"|"uint32_t"|"uint64_t"
stdint_types_s "int8_t"|"int16_t"|"int32_t"|"int64_t"
integer int_types|unsigned_int_types|signed_int_types|stdint_types_u|stdint_types_s
float "float"|"double"|"long double"
string ["const "]"char"{whitespace*}"*"
pointer "*"
%option noyywrap
%option nodefault
%option yylineno
%x COMMENT
%%
%{
#include <stdlib.h>
#include "y.tab.h"
%}
<*>"/*" { BEGIN(COMMENT); }
<COMMENT>"*/" { BEGIN(INITIAL); }
<COMMENT>[^*\n] { }
<COMMENT>\n { }
<COMMENT>"*"[^*\/\n]* { }
<INITIAL>"#"[^\n]"\n" { /* includes, macros, ... */ }
<INITIAL>"typedef" { return TYPEDEF; }
<INITIAL>"struct" { return STRUCT; }
<INITIAL>{integer} { return LONG; }
<INITIAL>{float} { return DOUBLE; }
<INITIAL>{string} { return STRING; }
<INITIAL>{pointer} { return POINTER; }
<INITIAL>";" { return SEMICOLON; }
<INITIAL>"{" { return OPEN_BRACES; }
<INITIAL>"}" { return CLOSE_BRACES; }
<INITIAL>"[" { return OPEN_BRACKETS; }
<INITIAL>"]" { return CLOSE_BRACKETS; }
<INITIAL>{id} { return ID; }
<INITIAL>{hex} { yylval = strtol(yytext, NULL, 16); return NUM; }
<INITIAL>{dec} { yylval = strtol(yytext, NULL, 10); return NUM; }
<INITIAL>{whitespace}+ { }
<INITIAL>. { fprintf(stderr, "lexical error in line %d.\n", yylineno); exit(1); }