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

int main(int argc, char *argv[])
{
        FILE *dff;
        unsigned int offset, size;
	int header, vcount;
        int temp, dword;
        if (argc < 2)
                exit(1);
        if ((dff = fopen(argv[1], "r")) == NULL)
                exit(1);
        sscanf(argv[2], "%X", &offset);
        printf("starting at: %X\n", offset);

        fseek(dff, offset, 0);
        fread(&temp, 4, 1, dff);
        if (temp != 0x510) 
                exit(1);
	fread(&size, 4, 1, dff);
        fseek(dff, 16, SEEK_CUR);
	printf("%X\n", ftell(dff));
	printf("%X\n", size+offset);
        while ((size+offset) > (ftell(dff))) {
		temp = getc(dff) << 24;
		temp += getc(dff) << 16;
		temp += getc(dff) << 8;
		temp += getc(dff);

		header = temp & 0xffff00ff;
		switch (header) {
		case 0x00800068:
			vcount = (temp & 0x0000ff00) >> 8;
			printf("vertexheader detected, skipping,\
 %d Vertices\n", vcount);
			fseek(dff, vcount*12, SEEK_CUR);
			if ((vcount * 12) % 16 != 0)
				fseek(dff, 16-(vcount * 12 % 16), SEEK_CUR);
			break;
		case 0x01800064:
			vcount = (temp & 0x0000ff00) >> 8;
			printf("UVheader detected, skipping, \
%d Vertices\n", vcount);
			fseek(dff, vcount*8, SEEK_CUR);
			if ((vcount * 8) % 16 != 0)
				fseek(dff, 16-(vcount * 8 % 16), SEEK_CUR);
			break;
		case 0x02C0006e:
			vcount = (temp & 0x0000ff00) >> 8;
			printf("Vertexcolorheader detected, skipping, \
%d Vertices\n", vcount);
			fseek(dff, vcount*4, SEEK_CUR);
			if ((vcount * 4) % 16 != 0)
				fseek(dff, 16-(vcount * 4 % 16), SEEK_CUR);
			break;
		case 0x0380006a:
			vcount = (temp & 0x0000ff00) >> 8;
			printf("Normalheader detected, skipping, \
%d Vertices\n", vcount);
			fseek(dff, vcount*3, SEEK_CUR);
			if ((vcount * 3) % 16 != 0)
				fseek(dff, 16-(vcount * 3) % 16, SEEK_CUR);
			break;
		default:
                	printf("%X: %X\n", ftell(dff), temp);
		}	
	}
        return 0;
}