weissman

weissman.c

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

typedef struct _hdr {
    uint8_t magic[8];
    uint32_t version;
    uint32_t num_files;
} hdr;

typedef struct _entry {
    uint32_t magic;
    uint32_t compressed_size;
    uint32_t uncompressed_size;
    uint8_t filename[32];
} entry;

int main(int argc, char* argv[])
{
	FILE *fp, *ofp;
	hdr head;
	entry file;
	char* data;
	int count = 0;
	
	fp = fopen(argv[1], "r");
	fread(&head, sizeof(hdr), 1, fp);
	printf("magic: %s\nversion: %d\nnum: %d\n", head.magic, head.version, head.num_files);
	//files = (entry *)malloc(sizeof(entry) * head.num_files);
	
	while(count < head.num_files)
	{
		fread(&file, sizeof(entry), 1, fp);
		printf("filename: %s\n\tmagic: %d\n\tcompressed_size: %d\n\tuncompressed_size: %d\n", file.filename, file.magic, file.compressed_size, file.uncompressed_size);
		data = (char *)malloc(file.compressed_size);
		fread(data, file.compressed_size, 1, fp);
		ofp = fopen(file.filename, "w");
		fwrite(data, file.compressed_size, 1, ofp);
		fclose(ofp);
		free(data);
		count++;
	}
	
	//free(files);
	fclose(fp);
	return 0;
}