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| author | Philipp Gesang <phg@phi-gamma.net> | 2017-02-10 23:33:18 +0100 |
|---|---|---|
| committer | Philipp Gesang <phg@phi-gamma.net> | 2017-02-10 23:35:22 +0100 |
| commit | 7672c73027c722849e9beeaab1f3e95351fd6b25 (patch) | |
| tree | 0a1fbd8c4e9b821022482a28a1f4a5a33ca4020c /src | |
| parent | 5711c3b96a11549233afd9bfcbfea16189321525 (diff) | |
| download | luaotfload-7672c73027c722849e9beeaab1f3e95351fd6b25.tar.gz | |
[parsers] allow escapes and balanced brackets in path lookups
With that, the definition parser will accept anything except for
unbalanced brackets -- unless backslash escaped -- as part of the font
definition.
Diffstat (limited to 'src')
| -rw-r--r-- | src/luaotfload-parsers.lua | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/src/luaotfload-parsers.lua b/src/luaotfload-parsers.lua index 8c297ac..b188bb0 100644 --- a/src/luaotfload-parsers.lua +++ b/src/luaotfload-parsers.lua @@ -12,7 +12,8 @@ local traversal_maxdepth = 42 --- prevent stack overflows local rawset = rawset local lpeg = require "lpeg" -local P, R, S = lpeg.P, lpeg.R, lpeg.S +local patterns = lpeg.patterns +local P, R, S, V = lpeg.P, lpeg.R, lpeg.S, lpeg.V local lpegmatch = lpeg.match local C, Cc, Cf = lpeg.C, lpeg.Cc, lpeg.Cf local Cg, Cmt, Cs, Ct = lpeg.Cg, lpeg.Cmt, lpeg.Cs, lpeg.Ct @@ -57,6 +58,7 @@ local equals = P"=" local dash = P"-" local gartenzaun = P"#" local lbrk, rbrk = P"[", P"]" +local brackets = lbrk + rbrk local squote = P"'" local dquote = P"\"" @@ -634,7 +636,18 @@ local prefixed = P"name:" * ws * Cg(fontname, "name") + P"kpse:" * ws * Cg(fontname, "kpse") + P"my:" * ws * Cg(fontname, "my") local unprefixed = Cg(fontname, "anon") -local path_lookup = lbrk * Cg(C((1-rbrk)^1), "path") * rbrk +--- Bracketed “path” lookups: These may contain any character except +--- for unbalanced brackets. A backslash escapes any following +--- character. Everything inside the outermost brackets is treated as +--- part of the filename or path to look up. Subfonts may be specified +--- in parens *after* the closing bracket. Note that this differs from +--- Xetex whose syntax expects the subfont passed inside the brackets, +--- separated by a colon. +local path_escape = backslash / "" * patterns.utf8char +local path_content = path_escape + (1 - brackets) +local path_balanced = { (path_content + V(2))^1 + , lbrk * V(1)^-1 * rbrk } +local path_lookup = lbrk * Cg(Cs(path_balanced), "path") * rbrk * subfont^-1 --- features ---------------------------------------------------------- |