pas.c

/* pas - papyrus assembler
 * Copyright (C) 2017  Oskar Sveinsen
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <stdint.h>
#include <stdio.h>

#include "pas.h"

char **strings;

int
disassemble(FILE *in, FILE *out)
{
	int i;
	uint64_t buf8;
	uint32_t buf4;
	uint16_t buf2;

	/* header */
	fread(&buf4, 4, 1, in);
	if (buf4 != PEX_SIGNATURE)
		return 0;
	fread(&buf2, 2, 1, in);
	if (!PEX_IS_VERSION_SUPPORTED(buf2))
		return 0;
	getc(in);
	getc(in);

	/* info */
	fputs(".info\n\t.compileTime ", out);
	fread(&buf8, 8, 1, in);
	fprintf(out, "%lu\n\t.source \"", buf8);
	fread(&buf2, 2, 1, in);
	for (i = 0; i < buf2; i++)
		fputc(out, getc(in));
	fputs("\"\n\t.user \"", out);
	fread(&buf2, 2, 1, in);
	for (i = 0; i < buf2; i++)
		fputc(out, getc(in));
	fputs("\"\n\t.computer \"", out);
	fread(&buf2, 2, 1, in);
	for (i = 0; i < buf2; i++)
		fputc(out, getc(in));
	fputs("\"\n.endInfo\n", out);

	/* strings */
	fread(&buf2, 2, 1, in);
	strings = malloc(buf2);
	for (i = 0; i < buf2; i++) {
		uint16_t len;

		fread(&len, 2, 1, in);
		strings[i] = malloc(len + 1);
		fread(strings[i], 1, len, in);
		strings[i][len + 1] = '\0';
	}
}