mirror of
https://github.com/koreader/koreader
synced 2024-11-04 12:00:25 +00:00
3c857e4016
Remove the subprocess management functions from xutil.lua, as they were moved into base/ffi/util.lua, and use them from there. Also use the cre_storage_size_factor setting when processing credocuments, to avoid CRE WARNING while indexing too. Fix dealing with MuPDF document opening failures (previously, these were not noticed and indexing was retried each time).
49 lines
1.8 KiB
Lua
49 lines
1.8 KiB
Lua
local ffi = require("ffi")
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-- Utilities functions needed by this plugin, but that may be added to
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-- existing base/ffi/ files
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local xutil = {}
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-- Data compression/decompression of strings thru zlib (may be put in a new base/ffi/zlib.lua)
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-- from http://luajit.org/ext_ffi_tutorial.html
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ffi.cdef[[
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unsigned long compressBound(unsigned long sourceLen);
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int compress2(uint8_t *dest, unsigned long *destLen,
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const uint8_t *source, unsigned long sourceLen, int level);
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int uncompress(uint8_t *dest, unsigned long *destLen,
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const uint8_t *source, unsigned long sourceLen);
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]]
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local zlib = ffi.load(ffi.os == "Windows" and "zlib1" or "z")
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function xutil.zlib_compress(data)
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local n = zlib.compressBound(#data)
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local buf = ffi.new("uint8_t[?]", n)
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local buflen = ffi.new("unsigned long[1]", n)
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local res = zlib.compress2(buf, buflen, data, #data, 9)
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assert(res == 0)
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return ffi.string(buf, buflen[0])
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end
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function xutil.zlib_uncompress(zdata, datalen)
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local buf = ffi.new("uint8_t[?]", datalen)
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local buflen = ffi.new("unsigned long[1]", datalen)
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local res = zlib.uncompress(buf, buflen, zdata, #zdata)
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assert(res == 0)
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return ffi.string(buf, buflen[0])
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end
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-- Not provided by base/thirdparty/lua-ljsqlite3/init.lua
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-- Add a timeout to a lua-ljsqlite3 connection
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-- We need that if we have multiple processes accessing the same
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-- SQLite db for reading or writting (read lock and write lock can't be
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-- obtained at the same time, so waiting & retry is needed)
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-- SQLite will retry getting a lock every 1ms to 100ms for
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-- the timeout_ms given here
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local sql = ffi.load("sqlite3")
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function xutil.sqlite_set_timeout(conn, timeout_ms)
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sql.sqlite3_busy_timeout(conn._ptr, timeout_ms)
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end
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-- For reference, SQ3 doc at: http://scilua.org/ljsqlite3.html
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return xutil
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