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-rw-r--r--lualibs-gzip.lua54
-rw-r--r--whatsnew.lua1
2 files changed, 55 insertions, 0 deletions
diff --git a/lualibs-gzip.lua b/lualibs-gzip.lua
new file mode 100644
index 0000000..5100e47
--- /dev/null
+++ b/lualibs-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
diff --git a/whatsnew.lua b/whatsnew.lua
index 30cf837..0c0ca9b 100644
--- a/whatsnew.lua
+++ b/whatsnew.lua
@@ -46,6 +46,7 @@ local filenames = {
"dir",
"file",
"function",
+ "gzip",
"io",
"lpeg",
"lua",