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%option noyywrap
%{
#include <stdlib.h>
#include <string.h>
#include "symbol-table.h"
#define SIZE_OF_ARR(x) (sizeof(x)/sizeof(x[0]))
static int line_number = 1;
/* You need to define for all tokens in C--, here are some examples */
typedef enum CcmmcToken_enum {
CCMMC_TOKEN_ID = 1,
CCMMC_TOKEN_CONST_INT,
CCMMC_TOKEN_CONST_FLOAT,
CCMMC_TOKEN_CONST_STRING,
CCMMC_TOKEN_COMMENT,
CCMMC_TOKEN_OP_ASSIGN,
CCMMC_TOKEN_OP_OR,
CCMMC_TOKEN_OP_AND,
CCMMC_TOKEN_OP_NOT,
CCMMC_TOKEN_OP_ADD,
CCMMC_TOKEN_OP_SUB,
CCMMC_TOKEN_OP_MUL,
CCMMC_TOKEN_OP_DIV,
CCMMC_TOKEN_OP_GT,
CCMMC_TOKEN_OP_LT,
CCMMC_TOKEN_OP_GE,
CCMMC_TOKEN_OP_LE,
CCMMC_TOKEN_OP_NE,
CCMMC_TOKEN_OP_EQ,
CCMMC_TOKEN_DL_LPAREN,
CCMMC_TOKEN_DL_RPAREN,
CCMMC_TOKEN_DL_LBRACK,
CCMMC_TOKEN_DL_RBRACK,
CCMMC_TOKEN_DL_LBRACE,
CCMMC_TOKEN_DL_RBRACE,
CCMMC_TOKEN_DL_COMMA,
CCMMC_TOKEN_DL_SEMICOL,
CCMMC_TOKEN_DL_DOT,
CCMMC_TOKEN_NEWLINE,
CCMMC_TOKEN_ERROR = 100
} CcmmcToken;
%}
letter [A-Za-z]
digit [0-9]
ID {letter}({letter}|{digit}|"_")*
WS [ \t]+
/* You need to define the following RE's */
CONST_INT [+-]?{digit}+
CONST_FLOAT [+-]?(([0-9]+\.?|[0-9]*\.[0-9]+)([eE][-+]?[0-9]+)?)
/* {digit}+\.{digit}+ */
CONST_STRING \"([^\"\n]|(\\.))*\"
COMMENT \/\*([^*]|\n|(\*+([^*/]|\n)))*\*+\/
/* operators */
OP_ASSIGN "="
OP_OR "||"
OP_AND "&&"
OP_NOT "!"
OP_ADD "+"
OP_SUB "-"
OP_MUL "*"
OP_DIV "/"
OP_GT ">"
OP_LT "<"
OP_GE ">="
OP_LE "<="
OP_NE "!="
OP_EQ "=="
NEWLINE "\n"
/* separators */
DL_LPAREN "("
DL_RPAREN ")"
DL_LBRACK "["
DL_RBRACK "]"
DL_LBRACE "{"
DL_RBRACE "}"
DL_COMMA ","
DL_SEMICOL ";"
DL_DOT "."
ERROR .
%%
{WS} {}
{ID} {
int i;
char *reserved[] = {"return", "typedef", "if", "else",
"int", "float", "for", "void", "while"};
for (i = 0; i < SIZE_OF_ARR(reserved); i++)
if (strcmp(yytext, reserved[i]) == 0) break;
if (i == SIZE_OF_ARR(reserved)) {
CcmmcSymbol * ptr;
ptr = ccmmc_symbol_table_lookup(yytext);
if (ptr == NULL)
ccmmc_symbol_table_insert_id(yytext, line_number);
else
ptr->counter++;
}
}
{CONST_INT} {}
{CONST_FLOAT} {}
{CONST_STRING} {}
{COMMENT} puts(yytext);
{OP_ASSIGN} {}
{OP_OR} {}
{OP_AND} {}
{OP_NOT} {}
{OP_ADD} {}
{OP_SUB} {}
{OP_MUL} {}
{OP_DIV} {}
{OP_GT} {}
{OP_LT} {}
{OP_GE} {}
{OP_LE} {}
{OP_NE} {}
{OP_EQ} {}
{NEWLINE} line_number++;
{DL_LPAREN} {}
{DL_RPAREN} {}
{DL_LBRACK} {}
{DL_RBRACK} {}
{DL_LBRACE} {}
{DL_RBRACE} {}
{DL_COMMA} {}
{DL_SEMICOL} {}
{DL_DOT} {}
{ERROR} {
fprintf(stderr, "%d: error: undefined character `%s'\n",
line_number, yytext);
exit(1);
}
%%
// vim: set sw=4 ts=4 sts=4 et:
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