farbfeld

commit ac1630a81790f5db946d7091e08b758714c8cd19
parent 86495f8058518f7064f2ddda92314aa42163b4c0
Author: FRIGN <dev@frign.de>
Date:   Tue,  5 Jan 2016 01:39:10 +0100

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.

Diffstat:
M
farbfeld.5
 | 
9
+++++++--

1 file changed, 7 insertions(+), 2 deletions(-)
diff --git 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);
 		}