#include "Models.h"
#include "Quaternions.h"
#include "Serialize.h"

#include <unistd.h>

/* these all read big-endian data */

int ReadShort(int fd, int count, short *s)
{
	while (count--) {
		unsigned char buf[2];
		
		read(fd, buf, 2);
		
		*s = (short)((buf[0] << 8) | buf[1]);
		
		s++;
	}
}

int ReadInt(int fd, int count, int *s)
{
	while (count--) {
		unsigned char buf[4];
		
		read(fd, buf, 2);
		
		*s = (int)((buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]);
		
		s++;
	}
}

union intfloat {
	int i;
	float f;
} intfloat;

int ReadFloat(int fd, int count, float *f)
{
	union intfloat infl;
	
	while (count--) {
		ReadInt(fd, 1, &(infl.i));
		
		*f = infl.f;
		
		f++;
	}
}

int ReadXYZ(int fd, int count, XYZ *xyz)
{
	while (count--) {
		ReadFloat(fd, 1, &(xyz->x));
		ReadFloat(fd, 1, &(xyz->y));
		ReadFloat(fd, 1, &(xyz->z));
		
		xyz++;
	}
}

int ReadTexturedTriangle(int fd, int count, TexturedTriangle *tt)
{
	while (count--) {
		ReadShort(fd, 3, tt->vertex);
		ReadFloat(fd, 1, &(tt->r));
		ReadFloat(fd, 1, &(tt->g));
		ReadFloat(fd, 1, &(tt->b));
		
		tt++;
	}
}