main.c

#include "cmm-strtab.h"
#include "cmm-symtab.h"
#include "node.h"
#include "asm.h"
#include <string.h>


// from syntax.tab.c
int yyrestart(FILE *);
int yyparse();
void ast();
void semantic_analysis();
void free_ast();
void translate();


extern int is_syn_error;
extern bool semantic_error;


int main(int argc, char *argv[])
{
    /* Need arguments. */
    if (argc <= 2) {
        printf("Usage: %s infile outfile\n", argv[0]);
        return 1;
    }

    // ./cc src.cmm out.s
    FILE *file;
    file     = fopen(argv[1], "r");
    asm_file = fopen(argv[2], "w");

    if (!file) {
        perror(argv[1]);
        return 1;
    }
    else if (!asm_file) {
        perror(argv[2]);
        return 1;
    }

    /* Initialize strtab: a tab storaging all the strings */
    init_strtab();

    /* Lexical analysis */
    yyrestart(file);
    yyparse();

    /* Syntax analysis */
    if (!is_syn_error) {
        /* Semantic analysis */
        semantic_analysis();

        if (!semantic_error) {
            /* Generate asm codes */
            translate();
        }
    } else {
        /* Syntax error */
        free_ast();
        return 2;
    }
    
    /* Release the parsing tree. */
    free_ast();
    return 0;
}