stupid c++

simple.c

#if 0
#include <stdio.h>

int main(void)
{
    int n, t[3] = {0};
    for (n = 0; n < 100; ++n) {
        pytriples(t);
        printf("(%d,%d,%d)\n", t[0], t[1], t[2]);
    } return 0;
}
#endif

static void
pytriples(int *t)
{
    do  if (t[1] <= t[2])
            t[1] = t[1] + 1;
        else if (t[0] <= t[2])
            t[0] = t[1] = t[0] + 1;
        else t[2] += t[0] = t[1] = 1;
    while (t[0]*t[0] + t[1]*t[1] != t[2]*t[2]);
}

static int
atlas_stitch(struct img_atlas* atl, struct arena *a,
    const struct img* imgs, int img_cnt)
{
    // calculate total atlas image width and max height
    int w = 0, h = 0;
    for (int i = 0; i < img_cnt; ++i) {
        h = max(h, imgs[i].h);  
        w += imgs[i].w;
    }
    // allocate atlas
    struct img_info {int xoff, w, h;};
    struct img_info *img_infos = arena_alloc(a, sizeof(struct img_info) * img_cnt);
    unsigned *data = arena_alloc(a, w * h * 4);
    
    // fill atlas with images
    int xoff = 0;
    for (int i = 0; i < img_cnt; ++i) {
        img_infos[i] = (struct img_info){xoff, imgs[i].w, imgs[i].h};
        for (int y = 0; y < imgs[i].h; ++y) {
            for (int x = 0; x < imgs[i].w; ++x)
                data[w*y+xoff+x] = imgs[i].data[imgs[i].w*y+x];
        }
        xoff += imgs[0].w;
    }
}