diff options
| -rw-r--r-- | README.md | 2 | ||||
| -rw-r--r-- | src/liolib.js | 32 |
2 files changed, 33 insertions, 1 deletions
@@ -37,7 +37,7 @@ - [ ] `io.read()` - [ ] `io.tmpfile()` - [ ] `io.type()` - - [ ] `io.write()` + - [x] `io.write()` - [ ] `io.close()` - [ ] `file:flush()` - [ ] `file:lines()` diff --git a/src/liolib.js b/src/liolib.js index f753f91..f581323 100644 --- a/src/liolib.js +++ b/src/liolib.js @@ -1,5 +1,7 @@ "use strict"; +const fs = require('fs'); + const lua = require('./lua.js'); const lauxlib = require('./lauxlib.js'); @@ -33,7 +35,37 @@ const newprefile = function(L) { return p; }; +const getiofile = function(L, findex) { + lua.lua_getfield(L, lua.LUA_REGISTRYINDEX, findex); + let p = lua.lua_touserdata(L, -1); + if (isclosed(p)) + lauxlib.luaL_error(L, lua.to_luastring(`standard ${lua.to_jsstring(findex.slice(IOPREF_LEN))} file is closed`)); + return p.f; +}; + +const g_write = function(L, f, arg) { + let nargs = lua.lua_gettop(L) - arg; + let status = true; + let err; + for (; nargs--; arg++) { + let s = lauxlib.luaL_checklstring(L, arg); + try { + status = status && (fs.writeSync(f.fd, Uint8Array.from(s)) === s.length); + } catch (e) { + status = false; + err = e; + } + } + if (status) return 1; /* file handle already on stack top */ + else return lauxlib.luaL_fileresult(L, status, null, err); +}; + +const io_write = function(L) { + return g_write(L, getiofile(L, IO_OUTPUT), 1); +}; + const iolib = { + "write": io_write }; const flib = { |