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[cff] Sanitize `initialRandomSeed'.

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* src/cff/cffload.c (cff_load_private_dict): Make
`initial_random_seed' value always positive.
This commit is contained in:
Werner Lemberg 2017-02-20 09:06:22 +01:00
parent 753e1131ee
commit 156b30b1aa
2 changed files with 14 additions and 0 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2017-02-20 Werner Lemberg <wl@gnu.org>
[cff] Sanitize `initialRandomSeed'.
* src/cff/cffload.c (cff_load_private_dict): Make
`initial_random_seed' value always positive.
2017-02-20 Werner Lemberg <wl@gnu.org>
[cff] Introduce `random-seed' property (2/2).

7
src/cff/cffload.c
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@ -1913,6 +1913,13 @@
/* ensure that `num_blue_values' is even */
priv->num_blue_values &= ~1;
/* sanitize `initialRandomSeed' to be a positive value, if necessary; */
/* this is not mandated by the specification but by our implementation */
if ( priv->initial_random_seed < 0 )
priv->initial_random_seed = -priv->initial_random_seed;
else if ( priv->initial_random_seed == 0 )
priv->initial_random_seed = 987654321;
Exit:
/* clean up */
cff_blend_clear( subfont ); /* clear blend stack */