read/write files, not stdio (Daniel Borca)

diff --git a/progs/samples/rgbtoppm.c b/progs/samples/rgbtoppm.c
index 0bc73487b0d3aa142bf8894de5b6a8c282f5855e..116d9a8cfa5b64eb825a4d4c3e603f4101f7affd 100644 (file)
--- a/progs/samples/rgbtoppm.c
+++ b/progs/samples/rgbtoppm.c
@@ -256,18 +256,30 @@ int main(int argc, char **argv)
 {
        int width, height;
        GLubyte *data;
+        char buff[32];
+        int n;
+        FILE *fo;
 
-       if (argc != 2)
+       if (argc != 3)
        {
-               fprintf(stderr, "usage: %s <filename>\n", argv[0]);
+               fprintf(stderr, "usage: %s <infile.rgb> <outfile.p6>\n", argv[0]);
                return 1;
        }
 
        data = read_rgb_texture(argv[1], &width, &height);
 
-       printf("P6\n%d %d\n255\n", width, height);
-       fwrite(data, width * 3, height, stdout);
+       n = sprintf(buff, "P6\n%d %d\n255\n", width, height);
+
+        /* [dBorca] avoid LF to CRLF conversion */
+        if ((fo = fopen(argv[2], "wb")) == NULL) {
+           fprintf(stderr, "Cannot open output file!\n");
+           exit(1);
+        }
+
+       fwrite(buff, n, 1, fo);
+       fwrite(data, width * 3, height, fo);
+
+        fclose(fo);
 
        return 0;
 }
-