Fix bugs in farbfeld(5)-example

1) We forgot to write the header out again (no changes, but else the
   format would have obviously been broken)
2) The order of 'size' and 'count' was wrong in the fread- and fwrite-
   calls inside the loops, and the checks were failing.
   now this is fixed.

1 files changed, 7 insertions, 2 deletions

diff --git a/farbfeld.5 b/farbfeld.5
index 8c8ec31..74bd02c 100644
--- a/farbfeld.5
+++ b/farbfeld.5
@@ -72,9 +72,14 @@ if (memcmp("farbfeld", hdr, strlen("farbfeld"))) {
 width = ntohl(*((uint32_t *)(hdr + 8)));
 height = ntohl(*((uint32_t *)(hdr + 12)));
 
+if (fwrite(hdr, 1, sizeof(hdr), outfile) != sizeof(hdr)) {
+	fprintf(stderr, "write error\\n");
+	exit(1);
+}
+
 for (i = 0; i < height; i++) {
 	for (j = 0; j < width; j++) {
-		if (fread(rgba, 4, sizeof(uint16_t), infile) != 4) {
+		if (fread(rgba, sizeof(uint16_t), 4, infile) != 4) {
 			fprintf(stderr, "unexpected EOF\\n");
 			exit(1);
 		}
@@ -90,7 +95,7 @@ for (i = 0; i < height; i++) {
 		for (k = 0; k < 4; k++) {
 			rgba[k] = htons(rgba[k]);
 		}
-		if (fwrite(rgba, 4, sizeof(uint16_t), outfile) != 4) {
+		if (fwrite(rgba, sizeof(uint16_t), 4, outfile) != 4) {
 			fprintf(stderr, "write error\\n");
 			exit(1);
 		}