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Change _HB_SCRIPT_MAX_VALUE from 0xFFFFFFFF to 0x7FFFFFFF 

Fixes https://github.com/harfbuzz/harfbuzz/issues/504
This commit is contained in:
Behdad Esfahbod 2018-09-30 18:19:54 +02:00
parent dcfcb950b8
commit 90dd255e57
1 changed files with 5 additions and 3 deletions
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8
src/hb-common.h
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@ -340,13 +340,15 @@ typedef enum
HB_SCRIPT_INVALID = HB_TAG_NONE,
/* Dummy values to ensure any hb_tag_t value can be passed/stored as hb_script_t
* without risking undefined behavior. Include both a signed and unsigned max,
* since technically enums are int, and indeed, hb_script_t ends up being signed.
* without risking undefined behavior. We have two, for historical reasons.
* HB_TAG_MAX used to be unsigned, but that was invalid Ansi C, so was changed
* to _HB_SCRIPT_MAX_VALUE to be equal to HB_TAG_MAX_SIGNED as well.
*
* See this thread for technicalities:
*
* https://lists.freedesktop.org/archives/harfbuzz/2014-March/004150.html
*/
_HB_SCRIPT_MAX_VALUE = HB_TAG_MAX, /*< skip >*/
_HB_SCRIPT_MAX_VALUE = HB_TAG_MAX_SIGNED, /*< skip >*/
_HB_SCRIPT_MAX_VALUE_SIGNED = HB_TAG_MAX_SIGNED /*< skip >*/
} hb_script_t;