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

#pragma once

// PNG File Struct
struct PNG_START_FILE_STRUCT {
	unsigned char file_sig[8];
	unsigned char ihdr_length[4];
	unsigned char ihdr_header[4];
	unsigned char file_width[4];
	unsigned char file_height[4];
	unsigned char bit_depth[1];
	unsigned char color_type[1];
	unsigned char compression_method[1];
	unsigned char filter_method[1];
	unsigned char interlace_method[1];
	unsigned char ihdr_crc[4];
};

struct PNG_IDAT_FILE_STRUCT {
	union{
		unsigned char idat_length[4];
		uint32_t idat_data_length;
	};
	unsigned char idat_header[4];
	unsigned char idat_crc[4];
	unsigned char *idat_data;
};

struct PNG_FILE_STRUCT {
	struct PNG_START_FILE_STRUCT png_start_data;
	struct PNG_IDAT_FILE_STRUCT png_idat_data;
};

struct EMBED_THREAD_STRUCT {
	pthread_mutex_t *mutex_lock;
	pthread_t thread_id;
	int *searching;
	unsigned char *data;
	unsigned int data_len;
	size_t uncom_data_len;
	int width;
	int color_range;
	unsigned int win_size;
};

extern const long png_signature[8];

unsigned long check_header_length(unsigned char *addr, long offset);
int check_file_header(char *addr);
int create_cc_file(unsigned char *addr, unsigned long file_length);
unsigned char* file_to_char_array(FILE *in_file, size_t* size);
void populate_start_png(unsigned char *addr, struct PNG_START_FILE_STRUCT *png_data);
void populate_idat_png(unsigned char *addr, struct PNG_IDAT_FILE_STRUCT *png_data, unsigned long offset);