#include <stdio.h>

FILE *fp = stdout;

void foo(int n, int m){

const char *xyzw = "xyzw";

const char *rgba = "rgba";

const char *stpq = "stpq";

int i, idx[4];

for (i = 0; i < 4; i++) idx[i] = 0;

static int offset = 256;

offset++;

while (1){

fprintf(fp, " swizzler<T, %i, V1_ENCODE4_5(%i, %i, %i, %i, %i)> ", n, idx[0], idx[1], idx[2], idx[3], offset);

for (i = 0; i < n; i++) fprintf(fp, "%c", xyzw[idx[i]]);

fprintf(fp, ", ");

for (i = 0; i < n; i++) fprintf(fp, "%c", rgba[idx[i]]);

fprintf(fp, ", ");

for (i = 0; i < n; i++) fprintf(fp, "%c", stpq[idx[i]]);

fprintf(fp, ";\\\n");

for (i = 0; i < 4; i++){

idx[i]++;

if (idx[i] < m) break;

idx[i] = 0;

}

if (i == n) break;

}

}

int main(){

fp = fopen("swizzling.hpp", "wb");

fprintf(fp, "#pragma once\n");

fprintf(fp, "\n\n#define V1_VEC2_SWIZZLE \\\n");

foo(2, 2);

foo(3, 2);

foo(4, 2);

fprintf(fp, "\n\n#define V1_VEC3_SWIZZLE \\\n");

foo(2, 3);

foo(3, 3);

foo(4, 3);

fprintf(fp, "\n\n#define V1_VEC4_SWIZZLE \\\n");

foo(2, 4);

foo(3, 4);

foo(4, 4);

fprintf(fp, "\n\n");

fclose(fp);

return 0;

}