1 files changed, 50 insertions, 53 deletions
diff --git a/src/framebuffer.c b/src/framebuffer.c
index da0480e..c13d6ab 100644
--- a/src/framebuffer.c
+++ b/src/framebuffer.c
@@ -30,59 +30,56 @@
 #include <stdlib.h>
 
 
-int main()
+int
+main(void)
 {
-  auto struct fb_var_screeninfo var_info;
-  long width;
-  long height;
-  long y;
-  auto int fd;
-  register char* restrict mem;
-  register double grand_sum = 0;
-  double inv_width;
-  size_t ptr, len;
-  
-  if (fd = open("/dev/fb0", O_RDONLY), fd == -1)
-    return perror("get-luminosity::framebuffer: open: /dev/fb0"), close(fd), 1;
-  
-  if (ioctl(fd, (unsigned long)FBIOGET_VSCREENINFO, &var_info))
-    return perror("get-luminosity::framebuffer: ioctl"), close(fd), 1;
-  
-  width     = var_info.xres;
-  height    = var_info.yres;
-  inv_width = 1 / (double)width;
-  len       = (size_t)(width * height * 4);
-  
-  posix_fadvise(fd, 0, len, POSIX_FADV_SEQUENTIAL | POSIX_FADV_NOREUSE | POSIX_FADV_WILLNEED);
-  if (mem = malloc(len), mem == NULL)
-    return perror("get-luminosity::framebuffer: malloc"), close(fd), 1;
-  for (ptr = 0; ptr < len;)
-    {
-      register ssize_t got = read(fd, mem + ptr, len - ptr);
-      if (got <= 0)
-	return perror("get-luminosity::framebuffer: read"), close(fd), free(mem), 1;
-      ptr += (size_t)got;
-    }
-  close(fd);
-  
-  for (y = 0; y < height; y++)
-    {
-      register const int32_t* restrict linemem = (const int32_t*)(mem + y * width * 4);
-      register const int32_t* restrict end     = linemem + width;
-      register double sum = 0;
-      while (linemem != end)
-	{
-	  register int32_t value = *linemem++;
-	  sum += linearise(value, 0) + linearise(value, 1) + linearise(value, 2);
+	auto struct fb_var_screeninfo var_info;
+	long width;
+	long height;
+	long y;
+	auto int fd;
+	register char *restrict mem;
+	register double grand_sum = 0;
+	double inv_width;
+	size_t ptr, len;
+
+	if (fd = open("/dev/fb0", O_RDONLY), fd == -1)
+		return perror("get-luminosity::framebuffer: open: /dev/fb0"), 1;
+
+	if (ioctl(fd, (unsigned long)FBIOGET_VSCREENINFO, &var_info))
+		return perror("get-luminosity::framebuffer: ioctl"), close(fd), 1;
+
+	width     = var_info.xres;
+	height    = var_info.yres;
+	inv_width = 1 / (double)width;
+	len       = (size_t)(width * height * 4);
+
+	posix_fadvise(fd, 0, len, POSIX_FADV_SEQUENTIAL | POSIX_FADV_NOREUSE | POSIX_FADV_WILLNEED);
+	if (mem = malloc(len), mem == NULL)
+		return perror("get-luminosity::framebuffer: malloc"), close(fd), 1;
+	for (ptr = 0; ptr < len;) {
+		register ssize_t got = read(fd, mem + ptr, len - ptr);
+		if (got <= 0)
+			return perror("get-luminosity::framebuffer: read"), close(fd), free(mem), 1;
+		ptr += (size_t)got;
 	}
-      grand_sum += sum * inv_width;
-    }
-  grand_sum /= (double)(height * 3);
-  
-  fprintf(stderr, "%lf\n", (double)grand_sum);
-  fflush(stdout);
-  
-  free(mem);
-  return 0;
-}
+	close(fd);
 
+	for (y = 0; y < height; y++) {
+		register const int32_t *restrict linemem = (const int32_t*)(mem + y * width * 4);
+		register const int32_t *restrict end     = linemem + width;
+		register double sum = 0;
+		while (linemem != end) {
+			register int32_t value = *linemem++;
+			sum += linearise(value, 0) + linearise(value, 1) + linearise(value, 2);
+		}
+		grand_sum += sum * inv_width;
+	}
+	grand_sum /= (double)(height * 3);
+
+	fprintf(stderr, "%lf\n", (double)grand_sum);
+	fflush(stdout);
+
+	free(mem);
+	return 0;
+}