src/lua_console.c
author Tero Marttila <terom@fixme.fi>
Wed, 01 Apr 2009 00:57:34 +0300
changeset 105 b6b183fbf373
parent 93 42ade8285570
child 106 f00661136ac2
permissions -rw-r--r--
implement a separate nexus_lua module
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#include "lua_console.h"
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#include "lua_objs.h"
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#include "log.h"
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#include <stdlib.h>
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#include <lua5.1/lauxlib.h>
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static void lua_console_on_line (const char *line, void *arg)
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{
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    struct lua_console *lc = arg;
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    lua_State *L = lc->lua->st;
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    int ret;
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    // ignore empty lines and EOF
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    if (!line || !(*line))
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        return;
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    // XXX: move to nexus_lua
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    // load the line as a lua function
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    if ((ret = luaL_loadstring(L, line)))
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        goto error;
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    // execute it
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    if ((ret = lua_pcall(L, 0, 0, 0)))
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        goto error;
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    // XXX: display results?
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error:
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    if (ret) {
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        const char *error = lua_tostring(L, -1);
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        switch (ret) {
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            case LUA_ERRSYNTAX:
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                log_error("syntax error: %s", error);
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                break;
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            case LUA_ERRRUN:
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                log_error("runtime error: %s", error);
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                break;
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            case LUA_ERRMEM:
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                log_error("memory allocation error: %s", error);
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                break;
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            case LUA_ERRERR:
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                log_error("error handling error: %s", error);
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                break;
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            default:
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                log_error("unknown error: %s", error);
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                break;
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        };
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        lua_pop(L, 1);
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    }
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}
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static struct console_callbacks _console_callbacks = {
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    .on_line    = &lua_console_on_line,
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};
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err_t lua_console_create (struct lua_console **lc_ptr, struct console *console, struct nexus_lua *lua, struct error_info *err)
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{
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    struct lua_console *lc;
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    // allocate
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    if ((lc = calloc(1, sizeof(*lc))) == NULL)
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        return SET_ERROR(err, ERR_CALLOC);
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    // store
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    lc->console = console;
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    lc->lua = lua;
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    // set our console callbacks
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    console_set_callbacks(console, &_console_callbacks, lc);
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    // ok
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    *lc_ptr = lc;
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    return SUCCESS;
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}
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void lua_console_destroy (struct lua_console *lc)
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{
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    // the console
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    console_destroy(lc->console);
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    free(lc);
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}