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@ -1,7 +1,6 @@
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/* SPDX-License-Identifier: GPL-3.0-or-later */
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/* Copyright (C) 2021 KikooDX */
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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@ -10,18 +9,18 @@
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static const int kble_fmt_version = 0;
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static int read_byte(FILE *file);
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static int read_byte_group(FILE *file, int size);
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static void write_byte(FILE *file, unsigned char byte);
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static void write_byte_group(FILE *file, int value, int size);
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static char read_byte(FILE *file);
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static tile_t read_byte_group(FILE *file, int size);
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static void write_byte(FILE *file, char byte);
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static void write_byte_group(FILE *file, tile_t value, int size);
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void level_read(struct Level *level, char *path) {
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FILE *file = NULL;
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int byte = 0;
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int tile_size = 0;
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char byte = 0;
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unsigned int tile_size = 0;
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int level_size = 0;
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int tile = 0;
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int i = 0;
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tile_t tile = 0;
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/* open file in read mode */
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file = fopen(path, "rb");
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@ -40,6 +39,12 @@ void level_read(struct Level *level, char *path) {
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/* get tile size (in bytes) */
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tile_size = read_byte(file);
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/* check than tile size is in boundaries */
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if (tile_size > sizeof(tile_t) / sizeof(char)) {
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fprintf(stderr, "ERROR: tile size is too big ; "
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"maximum is %ld, found %d", sizeof(tile_t), tile_size);
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exit(EXIT_FAILURE);
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}
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/* get width */
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level->width = read_byte_group(file, 2);
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/* get height */
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@ -48,9 +53,9 @@ void level_read(struct Level *level, char *path) {
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/* allocate memory for data */
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level_size = level->width * level->height;
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if (level->data == NULL) {
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level->data = malloc(level_size * sizeof(int));
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level->data = malloc(level_size * sizeof(tile_t));
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} else {
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level->data = realloc(level->data, level_size * sizeof(int));
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level->data = realloc(level->data, level_size * sizeof(tile_t));
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}
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/* check for allocation failure */
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if (level->data == NULL) {
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@ -116,32 +121,30 @@ void level_write(struct Level level, char *path) {
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}
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/* Read a single byte safely (handle EOF). */
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static int read_byte(FILE *file) {
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static char read_byte(FILE *file) {
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const int byte = fgetc(file);
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if (byte == EOF) {
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fprintf(stderr, "ERROR: unexpected EOF\n");
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exit(EXIT_FAILURE);
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}
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return byte;
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return (char)byte;
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}
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/* Read multiple bytes and "merge" them into one integer. */
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static int read_byte_group(FILE *file, int size) {
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static tile_t read_byte_group(FILE *file, int size) {
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int group = 0;
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uint8_t *byte_ptr = (uint8_t*)&group;
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char *byte_ptr = (char*)&group;
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int i = 0;
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byte_ptr += size;
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for (i = 0; i < size; i += 1) {
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byte_ptr -= 1;
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byte_ptr -= 1,
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*byte_ptr = read_byte(file);
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printf("%d ", *byte_ptr);
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}
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printf("%d\n", group);
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return group;
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}
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/* Write a single byte safely (handle EOF). */
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static void write_byte(FILE *file, unsigned char byte) {
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static void write_byte(FILE *file, char byte) {
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const int result = fputc(byte, file);
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if (result == EOF) {
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fprintf(stderr, "ERROR: file write error\n");
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@ -150,14 +153,12 @@ static void write_byte(FILE *file, unsigned char byte) {
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}
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/* Write an integer as multiple bytes. */
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static void write_byte_group(FILE *file, int value, int size) {
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uint8_t *value_ptr = (uint8_t*)&value;
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static void write_byte_group(FILE *file, tile_t value, int size) {
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char *value_ptr = (char*)&value;
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value_ptr += size;
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int i = 0;
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for (i = 0; i < size; i += 1) {
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value_ptr -= 1;
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printf("%d ", *value_ptr);
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write_byte(file, *value_ptr);
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}
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printf("\n");
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}
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