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/* vim:sts=4 sw=4 expandtab
*/
/*
* Copyright (c) 2011-2015 Rob Hoelz <rob@hoelz.ro>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is furnished
* to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <lua.h>
#include <lauxlib.h>
#include <stdlib.h>
#include "linenoise.h"
#define LN_COMPLETION_TYPE "linenoiseCompletions*"
static int completion_func_ref;
static lua_State *completion_state;
static int handle_ln_error(lua_State *L)
{
lua_pushnil(L);
return 1;
}
static int handle_ln_ok(lua_State *L)
{
lua_pushboolean(L, 1);
return 1;
}
static void completion_callback_wrapper(const char *line, linenoiseCompletions *completions, int pos)
{
lua_State *L = completion_state;
lua_rawgeti(L, LUA_REGISTRYINDEX, completion_func_ref);
*((linenoiseCompletions **) lua_newuserdata(L, sizeof(linenoiseCompletions *))) = completions;
luaL_getmetatable(L, LN_COMPLETION_TYPE);
lua_setmetatable(L, -2);
lua_pushstring(L, line);
lua_pushinteger(L, pos);
lua_pcall(L, 3, 0, 0);
}
static int l_linenoise(lua_State *L)
{
const char *prompt = luaL_checkstring(L, 1);
char *line;
completion_state = L;
line = linenoise(prompt);
completion_state = NULL;
if(! line) {
return handle_ln_error(L);
}
lua_pushstring(L, line);
free(line);
return 1;
}
static int lines_next(lua_State *L)
{
lua_pushcfunction(L, l_linenoise);
lua_pushvalue(L, lua_upvalueindex(1));
lua_call(L, 1, 1);
return 1;
}
static int l_lines(lua_State *L)
{
luaL_checkstring(L, 1);
lua_pushcclosure(L, lines_next, 1);
return 1;
}
static int l_historyadd(lua_State *L)
{
const char *line = luaL_checkstring(L, 1);
if(! linenoiseHistoryAdd(line)) {
return handle_ln_error(L);
}
return handle_ln_ok(L);
}
static int l_preloadbuffer(lua_State *L)
{
const char *line = luaL_checkstring(L, 1);
linenoisePreloadBuffer(line);
return handle_ln_ok(L);
}
static int l_historysetmaxlen(lua_State *L)
{
int len = luaL_checkinteger(L, 1);
if(! linenoiseHistorySetMaxLen(len)) {
return handle_ln_error(L);
}
return handle_ln_ok(L);
}
static int l_historysave(lua_State *L)
{
const char *filename = luaL_checkstring(L, 1);
if(linenoiseHistorySave((char *) filename) < 0) {
return handle_ln_error(L);
}
return handle_ln_ok(L);
}
static int l_historyload(lua_State *L)
{
const char *filename = luaL_checkstring(L, 1);
if(linenoiseHistoryLoad((char *) filename) < 0) {
return handle_ln_error(L);
}
return handle_ln_ok(L);
}
static int l_clearscreen(lua_State *L)
{
linenoiseClearScreen();
return handle_ln_ok(L);
}
static int l_setcompletion(lua_State *L)
{
luaL_checktype(L, 1, LUA_TFUNCTION);
lua_pushvalue(L, 1);
completion_func_ref = luaL_ref(L, LUA_REGISTRYINDEX);
linenoiseSetCompletionCallback(completion_callback_wrapper);
return handle_ln_ok(L);
}
static int l_addcompletion(lua_State *L)
{
linenoiseCompletions *completions = *((linenoiseCompletions **) luaL_checkudata(L, 1, LN_COMPLETION_TYPE));
const char *entry = luaL_checkstring(L, 2);
int pos = luaL_checkinteger(L, 3);
linenoiseAddCompletion(completions, (char *) entry, pos);
return handle_ln_ok(L);
}
static int l_refresh(lua_State *L)
{
linenoiseRefresh();
return handle_ln_ok(L);
}
luaL_Reg linenoise_funcs[] = {
{ "linenoise", l_linenoise },
{ "historyadd", l_historyadd },
{ "historysetmaxlen", l_historysetmaxlen },
{ "historysave", l_historysave },
{ "historyload", l_historyload },
{ "clearscreen", l_clearscreen },
{ "setcompletion", l_setcompletion},
{ "addcompletion", l_addcompletion },
{ "preload", l_preloadbuffer },
{ "refresh", l_refresh },
/* Aliases for more consistent function names */
{ "addhistory", l_historyadd },
{ "sethistorymaxlen", l_historysetmaxlen },
{ "savehistory", l_historysave },
{ "loadhistory", l_historyload },
{ "line", l_linenoise },
{ "lines", l_lines },
{ NULL, NULL }
};
int luaopen_linenoise(lua_State *L)
{
lua_newtable(L);
luaL_newmetatable(L, LN_COMPLETION_TYPE);
lua_pushboolean(L, 0);
lua_setfield(L, -2, "__metatable");
lua_pop(L, 1);
#if LUA_VERSION_NUM > 501
luaL_setfuncs(L,linenoise_funcs,0);
#else
luaL_register(L, NULL, linenoise_funcs);
#endif
return 1;
}
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