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| author | Philipp Gesang <phg42.2a@gmail.com> | 2014-09-05 23:18:27 +0200 |
|---|---|---|
| committer | Philipp Gesang <phg42.2a@gmail.com> | 2014-09-05 23:40:33 +0200 |
| commit | e8d763adc95f74a036232ccbca36b24a662b1256 (patch) | |
| tree | 6d51bafed4ac0db6f78e88c4fdcbfcd5272c5814 /src/luaotfload-auxiliary.lua | |
| parent | ab2be7b7e82ea1b0103b70b327137a939df6b8fa (diff) | |
| download | luaotfload-e8d763adc95f74a036232ccbca36b24a662b1256.tar.gz | |
[auxiliary] robustify font property lookups
This adresses an issue with entries in the font table that lack the
common font structure (manually parsed fonts??). Subtable lookups
are now guarded with nil-checks.
Reported by Herbert Voss
Signed-off-by: Philipp Gesang <phg42.2a@gmail.com>
Diffstat (limited to 'src/luaotfload-auxiliary.lua')
| -rw-r--r-- | src/luaotfload-auxiliary.lua | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/src/luaotfload-auxiliary.lua b/src/luaotfload-auxiliary.lua index 89bf51b..b05d491 100644 --- a/src/luaotfload-auxiliary.lua +++ b/src/luaotfload-auxiliary.lua @@ -417,7 +417,9 @@ least one feature. local provides_script = function (font_id, asked_script) asked_script = stringlower(asked_script) if font_id and font_id > 0 then - local fontdata = identifiers[font_id].shared.rawdata + local tfmdata = identifiers[font_id] if not tfmdata then return false end + local shared = tfmdata.shared if not shared then return false end + local fontdata = shared.rawdata if not fontdata then return false end if fontdata then local fontname = fontdata.metadata.fontname local features = fontdata.resources.features @@ -455,7 +457,9 @@ local provides_language = function (font_id, asked_script, asked_language) asked_script = stringlower(asked_script) asked_language = stringlower(asked_language) if font_id and font_id > 0 then - local fontdata = identifiers[font_id].shared.rawdata + local tfmdata = identifiers[font_id] if not tfmdata then return false end + local shared = tfmdata.shared if not shared then return false end + local fontdata = shared.rawdata if not fontdata then return false end if fontdata then local fontname = fontdata.metadata.fontname local features = fontdata.resources.features @@ -527,7 +531,9 @@ local provides_feature = function (font_id, asked_script, asked_feature = lpegmatch(strip_garbage, asked_feature) if font_id and font_id > 0 then - local fontdata = identifiers[font_id].shared.rawdata + local tfmdata = identifiers[font_id] if not tfmdata then return false end + local shared = tfmdata.shared if not shared then return false end + local fontdata = shared.rawdata if not fontdata then return false end if fontdata then local features = fontdata.resources.features local fontname = fontdata.metadata.fontname |