From 082fbf3cccf0a7685896e1450f948be6b7e3dda2 Mon Sep 17 00:00:00 2001 From: Benoit Giannangeli Date: Thu, 10 Aug 2017 09:27:34 +0200 Subject: README.md: added paragraph about 32bits integers --- README.md | 3 +++ 1 file changed, 3 insertions(+) diff --git a/README.md b/README.md index ee6880f..7e76144 100644 --- a/README.md +++ b/README.md @@ -21,6 +21,9 @@ Lua strings are 8-bits clean and can embed `\0`. Which means that invalid UTF-8/ To address that issue, Lua strings are represented by an array of bytes in Fengari. To push a JS string on the stack you can use `lua_pushliteral` which will convert it to an array of bytes before pushing it. To get a Lua string on the stack as a JS string you can use `lua_tojsstring` which will attempt to convert it to a UTF-16 JS string. The latter won't give you what you expect if the Lua string is not a valid UTF-16 sequence. You can also convert strings with `lua.to_luastring` and `lua.to_jsstring`. +### Integers + +The JS number type is always a double, and hence cannot accurately represent integers with more than 53 bits. As such, we've taken the route of a rarely used define (`LUA_INT_TYPE=LUA_INT_LONG`) in the PUC-Rio sources, where floats are doubles, but integers are 32 bits. ### `require` and `package.loadlib` -- cgit v1.2.3-70-g09d2