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programming:lua:protobuf [2017/02/02 14:19] niziak [Neopalium] |
programming:lua:protobuf [2020/07/03 09:48] (current) niziak ↷ Page moved from lua:protobuf to programming:lua:protobuf |
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| ====== Protocol ====== | ====== Protocol ====== | ||
| * Encoding [[https://developers.google.com/protocol-buffers/docs/encoding]] | * Encoding [[https://developers.google.com/protocol-buffers/docs/encoding]] | ||
| Line 8: | Line 9: | ||
| ====== Libraries ====== | ====== Libraries ====== | ||
| - | ==== sean-lin based ==== | + | ===== sean-lin based ===== |
| [[https://github.com/sean-lin/protoc-gen-lua]] | [[https://github.com/sean-lin/protoc-gen-lua]] | ||
| * Latest commit 12 Jun 2014 | * Latest commit 12 Jun 2014 | ||
| Line 27: | Line 28: | ||
| - | ==== others ==== | + | ===== others ===== |
| [[https://github.com/indygreg/lua-protobuf]] | [[https://github.com/indygreg/lua-protobuf]] | ||
| * Last commit 27 Mar 2011 | * Last commit 27 Mar 2011 | ||
| Line 50: | Line 51: | ||
| - pb.io: a module to support binary mode read/write to stdin/stdout. | - pb.io: a module to support binary mode read/write to stdin/stdout. | ||
| </code> | </code> | ||
| - | ==== Neopalium ==== | + | |
| + | ===== Neopalium ===== | ||
| [[https://github.com/Neopallium/lua-pb]] | [[https://github.com/Neopallium/lua-pb]] | ||
| * Latest commit 18 Feb 2016 | * Latest commit 18 Feb 2016 | ||
| * **Own LUA parser** for .proto files (no need to compile) | * **Own LUA parser** for .proto files (no need to compile) | ||
| - | ====== Library API ====== | + | ======= Library API ======= |
| <code lua> | <code lua> | ||
| Line 72: | Line 74: | ||
| </code> | </code> | ||
| - | ==== Neopalium ==== | + | ===== Neopalium ===== |
| <code lua> | <code lua> | ||
| local pb = require 'pb' | local pb = require 'pb' | ||
| Line 154: | Line 156: | ||
| - | === Issue with 64bit number === | + | ==== Issue with 64bit number ==== |
| 18446744073709551615 is exactly 2^64-1 | 18446744073709551615 is exactly 2^64-1 | ||
| Line 163: | Line 165: | ||
| </code> | </code> | ||
| - | If library detects LuaJIT with FFI support, it is using FFI cdata to store 64 bit numbers 'int64_t'' or ''uint64_t'' | + | If library detects LuaJIT with FFI support, it is using FFI cdata to store 64 bit numbers ''int64_t'' or ''uint64_t'' |
| depends on ''signed'' argument passed to ''make_int64_func''. | depends on ''signed'' argument passed to ''make_int64_func''. | ||
| If no LuaJIT is used, big values are represented as 8 bytes strings. | If no LuaJIT is used, big values are represented as 8 bytes strings. | ||
| Line 172: | Line 174: | ||
| -- make_int64(b8,b7,b6,b5,b4,b3,b2,b1, signed) | -- make_int64(b8,b7,b6,b5,b4,b3,b2,b1, signed) | ||
| fakeNodeId = make_int64(0,0,0,0, 0,0,0,1 ) | fakeNodeId = make_int64(0,0,0,0, 0,0,0,1 ) | ||
| + | -- or initialize from string | ||
| + | local v = \255\255\255\255\255\255\255\255" | ||
| + | fakeNodeId = make_int65(v:byte(1,8)) | ||
| print (fakeNodeId) | print (fakeNodeId) | ||
| -- prints: '1ULL' | -- prints: '1ULL' | ||
| Line 181: | Line 186: | ||
| But library encoder doesn't work: | But library encoder doesn't work: | ||
| + | <code> | ||
| luaData = { | luaData = { | ||
| ["deviceId"] = 1.844674407371e+19; | ["deviceId"] = 1.844674407371e+19; | ||
| Line 189: | Line 195: | ||
| binProtoMsg decoded=deviceId: 0 | binProtoMsg decoded=deviceId: 0 | ||
| + | </code> | ||
| - | + | ===== djungelorm ===== | |
| - | ==== djungelorm ==== | + | |
| No documentation. Poor examples. | No documentation. Poor examples. | ||
| Need to dig in sources to familiarize. | Need to dig in sources to familiarize. | ||
| Line 232: | Line 238: | ||
| * _member:ParseFromString(serialized) | * _member:ParseFromString(serialized) | ||
| * _member:FindInitalizationErrors() | * _member:FindInitalizationErrors() | ||
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| <code lua> | <code lua> | ||