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authorKarl Berry <karl@freefriends.org>2013-06-23 23:38:05 +0000
committerKarl Berry <karl@freefriends.org>2013-06-23 23:38:05 +0000
commit60f28f85f2707b6a48c3b5aec0ea68b8ee21e466 (patch)
treeab34d8d573457bea6a804ee3d5de48dd500bf028 /Master/texmf-dist/tex/context/base/l-gzip.lua
parentac5882d0cb115e11b5cc2e62107ef5822f3507f5 (diff)
context
git-svn-id: svn://tug.org/texlive/trunk@30865 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/texmf-dist/tex/context/base/l-gzip.lua')
-rw-r--r--Master/texmf-dist/tex/context/base/l-gzip.lua54
1 files changed, 54 insertions, 0 deletions
diff --git a/Master/texmf-dist/tex/context/base/l-gzip.lua b/Master/texmf-dist/tex/context/base/l-gzip.lua
new file mode 100644
index 00000000000..5100e47222c
--- /dev/null
+++ b/Master/texmf-dist/tex/context/base/l-gzip.lua
@@ -0,0 +1,54 @@
+if not modules then modules = { } end modules ['l-gzip'] = {
+ version = 1.001,
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+if not gzip then
+
+ -- no fallback yet
+
+ return
+
+end
+
+local suffix, suffixes = file.suffix, file.suffixes
+
+function gzip.load(filename)
+ local f = io.open(filename,"rb")
+ if not f then
+ -- invalid file
+ elseif suffix(filename) == "gz" then
+ f:close()
+ local g = gzip.open(filename,"rb")
+ if g then
+ local str = g:read("*all")
+ g:close()
+ return str
+ end
+ else
+ local str = f:read("*all")
+ f:close()
+ return str
+ end
+end
+
+function gzip.save(filename,data)
+ if suffix(filename) ~= "gz" then
+ filename = filename .. ".gz"
+ end
+ local f = io.open(filename,"wb")
+ if f then
+ local s = zlib.compress(data or "",9,nil,15+16)
+ f:write(s)
+ f:close()
+ return #s
+ end
+end
+
+function gzip.suffix(filename)
+ local suffix, extra = suffixes(filename)
+ local gzipped = extra == "gz"
+ return suffix, gzipped
+end