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| author | David Phillips <dbphillipsnz@gmail.com> | 2016-04-26 14:09:32 +1200 |
|---|---|---|
| committer | David Phillips <dbphillipsnz@gmail.com> | 2016-04-26 14:18:27 +1200 |
| commit | 8aead43028c0320d755f06a7d43dd34e0e709278 (patch) | |
| tree | ab55b9a9318173713a6aad46530c4de27e40b337 | |
| parent | 410ed2005be52bceb57fcad26919bdac6171de5b (diff) | |
| download | pgm-interlace-8aead43028c0320d755f06a7d43dd34e0e709278.tar.xz | |
Add catch for non-positive white value
| -rw-r--r-- | pgm-interlace.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/pgm-interlace.c b/pgm-interlace.c index 861f30b..21226a7 100644 --- a/pgm-interlace.c +++ b/pgm-interlace.c @@ -45,6 +45,12 @@ int check_sanity(long width, long height, long white, unsigned int clust_total) return 1; } + if (white <= 0) + { + fprintf(stderr, "white value must be positive\n"); + return 1; + } + /* FIXME only support single-byte pixels, PGM supports 16-bit according * to <http://netpbm.sourceforge.net/doc/pgm.html> */ if (white > 255) |