pass_twothree.h File Reference

processing steps 2 and 3 More...

#include "state.h"

Go to the source code of this file.

Functions
int	pass_two (State *s)
	compilation pass 2 More...
int	write_data (State *s)
	compilation pass 3 More...

Detailed Description

processing steps 2 and 3

Check out documentation on steps

Definition in file pass_twothree.h.

Function Documentation

pass_two()

int pass_two

(

State *

s

)

compilation pass 2

Parameters

s	current state

Returns

0 on success, -1 on error

Simply subtitutes remaining operand values (forward labels).

Definition at line 19 of file pass_twothree.c.

                       {
    for (TokensListElement* ptr = s->tokens->head; ptr != NULL; ptr = ptr->next) {
        int ret = token_get_operand(s, ptr->token);
        if (ret < 0 || (ptr->token->type == TT_INSTR && (ptr->token->instr.number < 0))) {
            if (ret == 0) {
                ERROR("Undefined label reference!\n");
            }
            token_print(ptr->token);
            FAIL("Pass two failed!\n");
            return -1;
        }
    }
    return 0;
}

References ERROR, FAIL, TokensList::head, TokensListElement::next, Token::token_get_operand(), Token::token_print(), State::tokens, and TT_INSTR.

Referenced by main().

write_data()

int write_data

(

State *

s

)

compilation pass 3

Parameters

s	current state

Returns

0 on success, -1 on error

Writes binary data to file

Definition at line 69 of file pass_twothree.c.

                         {
    // first concat, then write
    // this way we only write (and destroy possible prev. file) if we can do that
    int l;
    char* data = concat_bin(s, &l);
    if (!data) {
        FAIL("Could not compile data!\n");
        return -1;
    }
 
    FILE* f = fopen(s->outfile, "wb");
    if (!f) {
        ERROR("An error occured opening the file %s!\n", s->outfile);
        ERROR("Error opening file: %s\n", strerror(errno));
        free(data);
        return -1;
    }
    fwrite(data, 1, l, f);
    free(data);
    fclose(f);
    return 0;
}

References concat_bin(), ERROR, FAIL, and State::outfile.

Referenced by main().