1dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* 2dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** $Id: lauxlib.c,v 1.248 2013/03/21 13:54:57 roberto Exp $ 3dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** Auxiliary functions for building Lua libraries 4dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** See Copyright Notice in lua.h 5dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com*/ 6dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 7dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 8dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include <errno.h> 9dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include <stdarg.h> 10dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include <stdio.h> 11dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include <stdlib.h> 12dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include <string.h> 13dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 14dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 15dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* This file uses only the official API of Lua. 16dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** Any function declared here could be written as an application function. 17dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com*/ 18dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 19dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#define lauxlib_c 20dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#define LUA_LIB 21dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 22dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include "lua.h" 23dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 24dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include "lauxlib.h" 25dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 26dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 27dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* 28dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** {====================================================== 29dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** Traceback 30dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** ======================================================= 31dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com*/ 32dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 33dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 34dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#define LEVELS1 12 /* size of the first part of the stack */ 35dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#define LEVELS2 10 /* size of the second part of the stack */ 36dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 37dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 38dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 39dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* 40dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** search for 'objidx' in table at index -1. 41dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** return 1 + string at top if find a good name. 42dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com*/ 43dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comstatic int findfield (lua_State *L, int objidx, int level) { 44dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (level == 0 || !lua_istable(L, -1)) 45dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return 0; /* not found */ 46dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushnil(L); /* start 'next' loop */ 47dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com while (lua_next(L, -2)) { /* for each pair in table */ 48dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (lua_type(L, -2) == LUA_TSTRING) { /* ignore non-string keys */ 49dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (lua_rawequal(L, objidx, -1)) { /* found object? */ 50dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pop(L, 1); /* remove value (but keep name) */ 51dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return 1; 52dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 53dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else if (findfield(L, objidx, level - 1)) { /* try recursively */ 54dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_remove(L, -2); /* remove table (but keep name) */ 55dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushliteral(L, "."); 56dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_insert(L, -2); /* place '.' between the two names */ 57dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_concat(L, 3); 58dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return 1; 59dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 60dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 61dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pop(L, 1); /* remove value */ 62dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 63dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return 0; /* not found */ 64dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 65dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 66dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 67dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comstatic int pushglobalfuncname (lua_State *L, lua_Debug *ar) { 68dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int top = lua_gettop(L); 69dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_getinfo(L, "f", ar); /* push function */ 70dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushglobaltable(L); 71dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (findfield(L, top + 1, 2)) { 72dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_copy(L, -1, top + 1); /* move name to proper place */ 73dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pop(L, 2); /* remove pushed values */ 74dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return 1; 75dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 76dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else { 77dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_settop(L, top); /* remove function and global table */ 78dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return 0; 79dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 80dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 81dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 82dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 83dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comstatic void pushfuncname (lua_State *L, lua_Debug *ar) { 84dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (*ar->namewhat != '\0') /* is there a name? */ 85dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushfstring(L, "function " LUA_QS, ar->name); 86dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else if (*ar->what == 'm') /* main? */ 87dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushliteral(L, "main chunk"); 88dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else if (*ar->what == 'C') { 89dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (pushglobalfuncname(L, ar)) { 90dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushfstring(L, "function " LUA_QS, lua_tostring(L, -1)); 91dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_remove(L, -2); /* remove name */ 92dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 93dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else 94dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushliteral(L, "?"); 95dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 96dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else 97dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushfstring(L, "function <%s:%d>", ar->short_src, ar->linedefined); 98dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 99dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 100dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 101dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comstatic int countlevels (lua_State *L) { 102dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_Debug ar; 103dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int li = 1, le = 1; 104dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com /* find an upper bound */ 105dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com while (lua_getstack(L, le, &ar)) { li = le; le *= 2; } 106dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com /* do a binary search */ 107dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com while (li < le) { 108dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int m = (li + le)/2; 109dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (lua_getstack(L, m, &ar)) li = m + 1; 110dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else le = m; 111dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 112dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return le - 1; 113dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 114dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 115dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 116dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API void luaL_traceback (lua_State *L, lua_State *L1, 117dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com const char *msg, int level) { 118dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_Debug ar; 119dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int top = lua_gettop(L); 120dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int numlevels = countlevels(L1); 121dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int mark = (numlevels > LEVELS1 + LEVELS2) ? LEVELS1 : 0; 122dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (msg) lua_pushfstring(L, "%s\n", msg); 123dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushliteral(L, "stack traceback:"); 124dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com while (lua_getstack(L1, level++, &ar)) { 125dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (level == mark) { /* too many levels? */ 126dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushliteral(L, "\n\t..."); /* add a '...' */ 127dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com level = numlevels - LEVELS2; /* and skip to last ones */ 128dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 129dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else { 130dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_getinfo(L1, "Slnt", &ar); 131dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushfstring(L, "\n\t%s:", ar.short_src); 132dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (ar.currentline > 0) 133dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushfstring(L, "%d:", ar.currentline); 134dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushliteral(L, " in "); 135dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com pushfuncname(L, &ar); 136dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (ar.istailcall) 137dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushliteral(L, "\n\t(...tail calls...)"); 138dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_concat(L, lua_gettop(L) - top); 139dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 140dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 141dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_concat(L, lua_gettop(L) - top); 142dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 143dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 144dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* }====================================================== */ 145dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 146dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 147dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* 148dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** {====================================================== 149dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** Error-report functions 150dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** ======================================================= 151dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com*/ 152dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 153dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API int luaL_argerror (lua_State *L, int narg, const char *extramsg) { 154dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_Debug ar; 155dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (!lua_getstack(L, 0, &ar)) /* no stack frame? */ 156dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return luaL_error(L, "bad argument #%d (%s)", narg, extramsg); 157dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_getinfo(L, "n", &ar); 158dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (strcmp(ar.namewhat, "method") == 0) { 159dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com narg--; /* do not count `self' */ 160dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (narg == 0) /* error is in the self argument itself? */ 161dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return luaL_error(L, "calling " LUA_QS " on bad self (%s)", 162dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com ar.name, extramsg); 163dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 164dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (ar.name == NULL) 165dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com ar.name = (pushglobalfuncname(L, &ar)) ? lua_tostring(L, -1) : "?"; 166dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return luaL_error(L, "bad argument #%d to " LUA_QS " (%s)", 167dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com narg, ar.name, extramsg); 168dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 169dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 170dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 171dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comstatic int typeerror (lua_State *L, int narg, const char *tname) { 172dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com const char *msg = lua_pushfstring(L, "%s expected, got %s", 173dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com tname, luaL_typename(L, narg)); 174dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return luaL_argerror(L, narg, msg); 175dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 176dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 177dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 178dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comstatic void tag_error (lua_State *L, int narg, int tag) { 179dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com typeerror(L, narg, lua_typename(L, tag)); 180dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 181dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 182dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 183dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API void luaL_where (lua_State *L, int level) { 184dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_Debug ar; 185dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (lua_getstack(L, level, &ar)) { /* check function at level */ 186dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_getinfo(L, "Sl", &ar); /* get info about it */ 187dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (ar.currentline > 0) { /* is there info? */ 188dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushfstring(L, "%s:%d: ", ar.short_src, ar.currentline); 189dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return; 190dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 191dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 192dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushliteral(L, ""); /* else, no information available... */ 193dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 194dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 195dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 196dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API int luaL_error (lua_State *L, const char *fmt, ...) { 197dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com va_list argp; 198dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com va_start(argp, fmt); 199dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_where(L, 1); 200dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushvfstring(L, fmt, argp); 201dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com va_end(argp); 202dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_concat(L, 2); 203dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return lua_error(L); 204dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 205dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 206dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 207dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API int luaL_fileresult (lua_State *L, int stat, const char *fname) { 208dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int en = errno; /* calls to Lua API may change this value */ 209dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (stat) { 210dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushboolean(L, 1); 211dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return 1; 212dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 213dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else { 214dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushnil(L); 215dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (fname) 216dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushfstring(L, "%s: %s", fname, strerror(en)); 217dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else 218dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushstring(L, strerror(en)); 219dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushinteger(L, en); 220dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return 3; 221dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 222dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 223dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 224dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 225dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#if !defined(inspectstat) /* { */ 226dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 227dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#if defined(LUA_USE_POSIX) 228dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 229dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include <sys/wait.h> 230dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 231dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* 232dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** use appropriate macros to interpret 'pclose' return status 233dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com*/ 234dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#define inspectstat(stat,what) \ 235dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (WIFEXITED(stat)) { stat = WEXITSTATUS(stat); } \ 236dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else if (WIFSIGNALED(stat)) { stat = WTERMSIG(stat); what = "signal"; } 237dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 238dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#else 239dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 240dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#define inspectstat(stat,what) /* no op */ 241dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 242dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#endif 243dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 244dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#endif /* } */ 245dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 246dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 247dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API int luaL_execresult (lua_State *L, int stat) { 248dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com const char *what = "exit"; /* type of termination */ 249dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (stat == -1) /* error? */ 250dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return luaL_fileresult(L, 0, NULL); 251dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else { 252dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com inspectstat(stat, what); /* interpret result */ 253dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (*what == 'e' && stat == 0) /* successful termination? */ 254dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushboolean(L, 1); 255dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else 256dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushnil(L); 257dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushstring(L, what); 258dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushinteger(L, stat); 259dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return 3; /* return true/nil,what,code */ 260dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 261dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 262dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 263dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* }====================================================== */ 264dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 265dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 266dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* 267dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** {====================================================== 268dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** Userdata's metatable manipulation 269dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** ======================================================= 270dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com*/ 271dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 272dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API int luaL_newmetatable (lua_State *L, const char *tname) { 273dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_getmetatable(L, tname); /* try to get metatable */ 274dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (!lua_isnil(L, -1)) /* name already in use? */ 275dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return 0; /* leave previous value on top, but return 0 */ 276dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pop(L, 1); 277dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_newtable(L); /* create metatable */ 278dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushvalue(L, -1); 279dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_setfield(L, LUA_REGISTRYINDEX, tname); /* registry.name = metatable */ 280dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return 1; 281dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 282dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 283dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 284dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API void luaL_setmetatable (lua_State *L, const char *tname) { 285dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_getmetatable(L, tname); 286dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_setmetatable(L, -2); 287dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 288dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 289dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 290dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API void *luaL_testudata (lua_State *L, int ud, const char *tname) { 291dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com void *p = lua_touserdata(L, ud); 292dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (p != NULL) { /* value is a userdata? */ 293dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (lua_getmetatable(L, ud)) { /* does it have a metatable? */ 294dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_getmetatable(L, tname); /* get correct metatable */ 295dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (!lua_rawequal(L, -1, -2)) /* not the same? */ 296dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com p = NULL; /* value is a userdata with wrong metatable */ 297dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pop(L, 2); /* remove both metatables */ 298dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return p; 299dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 300dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 301dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return NULL; /* value is not a userdata with a metatable */ 302dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 303dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 304dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 305dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API void *luaL_checkudata (lua_State *L, int ud, const char *tname) { 306dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com void *p = luaL_testudata(L, ud, tname); 307dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (p == NULL) typeerror(L, ud, tname); 308dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return p; 309dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 310dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 311dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* }====================================================== */ 312dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 313dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 314dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* 315dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** {====================================================== 316dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** Argument check functions 317dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** ======================================================= 318dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com*/ 319dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 320dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API int luaL_checkoption (lua_State *L, int narg, const char *def, 321dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com const char *const lst[]) { 322dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com const char *name = (def) ? luaL_optstring(L, narg, def) : 323dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_checkstring(L, narg); 324dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int i; 325dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com for (i=0; lst[i]; i++) 326dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (strcmp(lst[i], name) == 0) 327dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return i; 328dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return luaL_argerror(L, narg, 329dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushfstring(L, "invalid option " LUA_QS, name)); 330dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 331dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 332dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 333dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API void luaL_checkstack (lua_State *L, int space, const char *msg) { 334dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com /* keep some extra space to run error routines, if needed */ 335dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com const int extra = LUA_MINSTACK; 336dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (!lua_checkstack(L, space + extra)) { 337dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (msg) 338dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_error(L, "stack overflow (%s)", msg); 339dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else 340dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_error(L, "stack overflow"); 341dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 342dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 343dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 344dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 345dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API void luaL_checktype (lua_State *L, int narg, int t) { 346dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (lua_type(L, narg) != t) 347dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com tag_error(L, narg, t); 348dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 349dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 350dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 351dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API void luaL_checkany (lua_State *L, int narg) { 352dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (lua_type(L, narg) == LUA_TNONE) 353dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_argerror(L, narg, "value expected"); 354dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 355dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 356dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 357dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API const char *luaL_checklstring (lua_State *L, int narg, size_t *len) { 358dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com const char *s = lua_tolstring(L, narg, len); 359dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (!s) tag_error(L, narg, LUA_TSTRING); 360dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return s; 361dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 362dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 363dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 364dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API const char *luaL_optlstring (lua_State *L, int narg, 365dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com const char *def, size_t *len) { 366dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (lua_isnoneornil(L, narg)) { 367dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (len) 368dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com *len = (def ? strlen(def) : 0); 369dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return def; 370dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 371dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else return luaL_checklstring(L, narg, len); 372dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 373dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 374dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 375dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API lua_Number luaL_checknumber (lua_State *L, int narg) { 376dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int isnum; 377dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_Number d = lua_tonumberx(L, narg, &isnum); 378dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (!isnum) 379dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com tag_error(L, narg, LUA_TNUMBER); 380dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return d; 381dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 382dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 383dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 384dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API lua_Number luaL_optnumber (lua_State *L, int narg, lua_Number def) { 385dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return luaL_opt(L, luaL_checknumber, narg, def); 386dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 387dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 388dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 389dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API lua_Integer luaL_checkinteger (lua_State *L, int narg) { 390dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int isnum; 391dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_Integer d = lua_tointegerx(L, narg, &isnum); 392dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (!isnum) 393dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com tag_error(L, narg, LUA_TNUMBER); 394dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return d; 395dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 396dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 397dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 398dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API lua_Unsigned luaL_checkunsigned (lua_State *L, int narg) { 399dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int isnum; 400dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_Unsigned d = lua_tounsignedx(L, narg, &isnum); 401dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (!isnum) 402dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com tag_error(L, narg, LUA_TNUMBER); 403dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return d; 404dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 405dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 406dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 407dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API lua_Integer luaL_optinteger (lua_State *L, int narg, 408dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_Integer def) { 409dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return luaL_opt(L, luaL_checkinteger, narg, def); 410dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 411dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 412dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 413dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API lua_Unsigned luaL_optunsigned (lua_State *L, int narg, 414dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_Unsigned def) { 415dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return luaL_opt(L, luaL_checkunsigned, narg, def); 416dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 417dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 418dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* }====================================================== */ 419dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 420dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 421dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* 422dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** {====================================================== 423dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** Generic Buffer manipulation 424dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** ======================================================= 425dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com*/ 426dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 427dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* 428dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** check whether buffer is using a userdata on the stack as a temporary 429dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** buffer 430dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com*/ 431dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#define buffonstack(B) ((B)->b != (B)->initb) 432dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 433dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 434dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* 435dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** returns a pointer to a free area with at least 'sz' bytes 436dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com*/ 437dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API char *luaL_prepbuffsize (luaL_Buffer *B, size_t sz) { 438dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_State *L = B->L; 439dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (B->size - B->n < sz) { /* not enough space? */ 440dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com char *newbuff; 441dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com size_t newsize = B->size * 2; /* double buffer size */ 442dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (newsize - B->n < sz) /* not big enough? */ 443dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com newsize = B->n + sz; 444dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (newsize < B->n || newsize - B->n < sz) 445dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_error(L, "buffer too large"); 446dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com /* create larger buffer */ 447dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com newbuff = (char *)lua_newuserdata(L, newsize * sizeof(char)); 448dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com /* move content to new buffer */ 449dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com memcpy(newbuff, B->b, B->n * sizeof(char)); 450dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (buffonstack(B)) 451dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_remove(L, -2); /* remove old buffer */ 452dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com B->b = newbuff; 453dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com B->size = newsize; 454dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 455dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return &B->b[B->n]; 456dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 457dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 458dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 459dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API void luaL_addlstring (luaL_Buffer *B, const char *s, size_t l) { 460dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com char *b = luaL_prepbuffsize(B, l); 461dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com memcpy(b, s, l * sizeof(char)); 462dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_addsize(B, l); 463dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 464dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 465dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 466dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API void luaL_addstring (luaL_Buffer *B, const char *s) { 467dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_addlstring(B, s, strlen(s)); 468dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 469dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 470dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 471dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API void luaL_pushresult (luaL_Buffer *B) { 472dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_State *L = B->L; 473dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushlstring(L, B->b, B->n); 474dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (buffonstack(B)) 475dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_remove(L, -2); /* remove old buffer */ 476dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 477dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 478dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 479dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API void luaL_pushresultsize (luaL_Buffer *B, size_t sz) { 480dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_addsize(B, sz); 481dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_pushresult(B); 482dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 483dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 484dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 485dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API void luaL_addvalue (luaL_Buffer *B) { 486dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_State *L = B->L; 487dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com size_t l; 488dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com const char *s = lua_tolstring(L, -1, &l); 489dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (buffonstack(B)) 490dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_insert(L, -2); /* put value below buffer */ 491dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_addlstring(B, s, l); 492dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_remove(L, (buffonstack(B)) ? -2 : -1); /* remove value */ 493dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 494dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 495dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 496dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API void luaL_buffinit (lua_State *L, luaL_Buffer *B) { 497dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com B->L = L; 498dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com B->b = B->initb; 499dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com B->n = 0; 500dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com B->size = LUAL_BUFFERSIZE; 501dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 502dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 503dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 504dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API char *luaL_buffinitsize (lua_State *L, luaL_Buffer *B, size_t sz) { 505dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_buffinit(L, B); 506dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return luaL_prepbuffsize(B, sz); 507dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 508dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 509dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* }====================================================== */ 510dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 511dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 512dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* 513dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** {====================================================== 514dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** Reference system 515dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** ======================================================= 516dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com*/ 517dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 518dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* index of free-list header */ 519dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#define freelist 0 520dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 521dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 522dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API int luaL_ref (lua_State *L, int t) { 523dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int ref; 524dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (lua_isnil(L, -1)) { 525dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pop(L, 1); /* remove from stack */ 526dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return LUA_REFNIL; /* `nil' has a unique fixed reference */ 527dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 528dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com t = lua_absindex(L, t); 529dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_rawgeti(L, t, freelist); /* get first free element */ 530dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com ref = (int)lua_tointeger(L, -1); /* ref = t[freelist] */ 531dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pop(L, 1); /* remove it from stack */ 532dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (ref != 0) { /* any free element? */ 533dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_rawgeti(L, t, ref); /* remove it from list */ 534dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_rawseti(L, t, freelist); /* (t[freelist] = t[ref]) */ 535dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 536dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else /* no free elements */ 537dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com ref = (int)lua_rawlen(L, t) + 1; /* get a new reference */ 538dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_rawseti(L, t, ref); 539dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return ref; 540dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 541dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 542dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 543dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API void luaL_unref (lua_State *L, int t, int ref) { 544dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (ref >= 0) { 545dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com t = lua_absindex(L, t); 546dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_rawgeti(L, t, freelist); 547dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_rawseti(L, t, ref); /* t[ref] = t[freelist] */ 548dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushinteger(L, ref); 549dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_rawseti(L, t, freelist); /* t[freelist] = ref */ 550dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 551dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 552dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 553dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* }====================================================== */ 554dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 555dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 556dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* 557dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** {====================================================== 558dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** Load functions 559dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** ======================================================= 560dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com*/ 561dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 562dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comtypedef struct LoadF { 563dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int n; /* number of pre-read characters */ 564dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com FILE *f; /* file being read */ 565dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com char buff[LUAL_BUFFERSIZE]; /* area for reading file */ 566dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} LoadF; 567dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 568dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 569dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comstatic const char *getF (lua_State *L, void *ud, size_t *size) { 570dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com LoadF *lf = (LoadF *)ud; 571dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com (void)L; /* not used */ 572dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (lf->n > 0) { /* are there pre-read characters to be read? */ 573dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com *size = lf->n; /* return them (chars already in buffer) */ 574dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lf->n = 0; /* no more pre-read characters */ 575dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 576dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else { /* read a block from file */ 577dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com /* 'fread' can return > 0 *and* set the EOF flag. If next call to 578dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 'getF' called 'fread', it might still wait for user input. 579dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com The next check avoids this problem. */ 580dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (feof(lf->f)) return NULL; 581dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com *size = fread(lf->buff, 1, sizeof(lf->buff), lf->f); /* read block */ 582dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 583dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return lf->buff; 584dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 585dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 586dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 587dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comstatic int errfile (lua_State *L, const char *what, int fnameindex) { 588dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com const char *serr = strerror(errno); 589dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com const char *filename = lua_tostring(L, fnameindex) + 1; 590dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushfstring(L, "cannot %s %s: %s", what, filename, serr); 591dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_remove(L, fnameindex); 592dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return LUA_ERRFILE; 593dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 594dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 595dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 596dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comstatic int skipBOM (LoadF *lf) { 597dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com const char *p = "\xEF\xBB\xBF"; /* Utf8 BOM mark */ 598dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int c; 599dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lf->n = 0; 600dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com do { 601dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com c = getc(lf->f); 602dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (c == EOF || c != *(const unsigned char *)p++) return c; 603dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lf->buff[lf->n++] = c; /* to be read by the parser */ 604dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } while (*p != '\0'); 605dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lf->n = 0; /* prefix matched; discard it */ 606dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return getc(lf->f); /* return next character */ 607dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 608dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 609dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 610dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* 611dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** reads the first character of file 'f' and skips an optional BOM mark 612dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** in its beginning plus its first line if it starts with '#'. Returns 613dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** true if it skipped the first line. In any case, '*cp' has the 614dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** first "valid" character of the file (after the optional BOM and 615dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** a first-line comment). 616dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com*/ 617dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comstatic int skipcomment (LoadF *lf, int *cp) { 618dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int c = *cp = skipBOM(lf); 619dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (c == '#') { /* first line is a comment (Unix exec. file)? */ 620dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com do { /* skip first line */ 621dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com c = getc(lf->f); 622dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } while (c != EOF && c != '\n') ; 623dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com *cp = getc(lf->f); /* skip end-of-line, if present */ 624dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return 1; /* there was a comment */ 625dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 626dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else return 0; /* no comment */ 627dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 628dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 629dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 630dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API int luaL_loadfilex (lua_State *L, const char *filename, 631dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com const char *mode) { 632dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com LoadF lf; 633dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int status, readstatus; 634dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int c; 635dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int fnameindex = lua_gettop(L) + 1; /* index of filename on the stack */ 636dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (filename == NULL) { 637dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushliteral(L, "=stdin"); 638dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lf.f = stdin; 639dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 640dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else { 641dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushfstring(L, "@%s", filename); 642dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lf.f = fopen(filename, "r"); 643dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (lf.f == NULL) return errfile(L, "open", fnameindex); 644dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 645dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (skipcomment(&lf, &c)) /* read initial portion */ 646dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lf.buff[lf.n++] = '\n'; /* add line to correct line numbers */ 647dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (c == LUA_SIGNATURE[0] && filename) { /* binary file? */ 648dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lf.f = freopen(filename, "rb", lf.f); /* reopen in binary mode */ 649dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (lf.f == NULL) return errfile(L, "reopen", fnameindex); 650dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com skipcomment(&lf, &c); /* re-read initial portion */ 651dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 652dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (c != EOF) 653dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lf.buff[lf.n++] = c; /* 'c' is the first character of the stream */ 654dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com status = lua_load(L, getF, &lf, lua_tostring(L, -1), mode); 655dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com readstatus = ferror(lf.f); 656dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (filename) fclose(lf.f); /* close file (even in case of errors) */ 657dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (readstatus) { 658dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_settop(L, fnameindex); /* ignore results from `lua_load' */ 659dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return errfile(L, "read", fnameindex); 660dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 661dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_remove(L, fnameindex); 662dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return status; 663dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 664dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 665dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 666dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comtypedef struct LoadS { 667dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com const char *s; 668dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com size_t size; 669dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} LoadS; 670dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 671dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 672dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comstatic const char *getS (lua_State *L, void *ud, size_t *size) { 673dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com LoadS *ls = (LoadS *)ud; 674dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com (void)L; /* not used */ 675dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (ls->size == 0) return NULL; 676dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com *size = ls->size; 677dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com ls->size = 0; 678dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return ls->s; 679dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 680dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 681dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 682dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API int luaL_loadbufferx (lua_State *L, const char *buff, size_t size, 683dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com const char *name, const char *mode) { 684dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com LoadS ls; 685dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com ls.s = buff; 686dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com ls.size = size; 687dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return lua_load(L, getS, &ls, name, mode); 688dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 689dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 690dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 691dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API int luaL_loadstring (lua_State *L, const char *s) { 692dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return luaL_loadbuffer(L, s, strlen(s), s); 693dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 694dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 695dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* }====================================================== */ 696dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 697dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 698dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 699dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API int luaL_getmetafield (lua_State *L, int obj, const char *event) { 700dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (!lua_getmetatable(L, obj)) /* no metatable? */ 701dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return 0; 702dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushstring(L, event); 703dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_rawget(L, -2); 704dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (lua_isnil(L, -1)) { 705dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pop(L, 2); /* remove metatable and metafield */ 706dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return 0; 707dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 708dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else { 709dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_remove(L, -2); /* remove only metatable */ 710dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return 1; 711dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 712dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 713dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 714dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 715dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *event) { 716dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com obj = lua_absindex(L, obj); 717dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (!luaL_getmetafield(L, obj, event)) /* no metafield? */ 718dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return 0; 719dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushvalue(L, obj); 720dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_call(L, 1, 1); 721dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return 1; 722dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 723dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 724dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 725dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API int luaL_len (lua_State *L, int idx) { 726dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int l; 727dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int isnum; 728dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_len(L, idx); 729dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com l = (int)lua_tointegerx(L, -1, &isnum); 730dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (!isnum) 731dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_error(L, "object length is not a number"); 732dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pop(L, 1); /* remove object */ 733dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return l; 734dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 735dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 736dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 737dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API const char *luaL_tolstring (lua_State *L, int idx, size_t *len) { 738dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (!luaL_callmeta(L, idx, "__tostring")) { /* no metafield? */ 739dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com switch (lua_type(L, idx)) { 740dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com case LUA_TNUMBER: 741dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com case LUA_TSTRING: 742dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushvalue(L, idx); 743dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com break; 744dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com case LUA_TBOOLEAN: 745dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushstring(L, (lua_toboolean(L, idx) ? "true" : "false")); 746dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com break; 747dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com case LUA_TNIL: 748dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushliteral(L, "nil"); 749dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com break; 750dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com default: 751dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushfstring(L, "%s: %p", luaL_typename(L, idx), 752dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_topointer(L, idx)); 753dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com break; 754dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 755dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 756dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return lua_tolstring(L, -1, len); 757dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 758dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 759dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 760dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* 761dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** {====================================================== 762dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** Compatibility with 5.1 module functions 763dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** ======================================================= 764dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com*/ 765dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#if defined(LUA_COMPAT_MODULE) 766dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 767dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comstatic const char *luaL_findtable (lua_State *L, int idx, 768dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com const char *fname, int szhint) { 769dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com const char *e; 770dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (idx) lua_pushvalue(L, idx); 771dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com do { 772dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com e = strchr(fname, '.'); 773dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (e == NULL) e = fname + strlen(fname); 774dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushlstring(L, fname, e - fname); 775dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_rawget(L, -2); 776dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (lua_isnil(L, -1)) { /* no such field? */ 777dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pop(L, 1); /* remove this nil */ 778dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_createtable(L, 0, (*e == '.' ? 1 : szhint)); /* new table for field */ 779dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushlstring(L, fname, e - fname); 780dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushvalue(L, -2); 781dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_settable(L, -4); /* set new table into field */ 782dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 783dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else if (!lua_istable(L, -1)) { /* field has a non-table value? */ 784dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pop(L, 2); /* remove table and value */ 785dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return fname; /* return problematic part of the name */ 786dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 787dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_remove(L, -2); /* remove previous table */ 788dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com fname = e + 1; 789dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } while (*e == '.'); 790dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return NULL; 791dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 792dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 793dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 794dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* 795dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** Count number of elements in a luaL_Reg list. 796dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com*/ 797dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comstatic int libsize (const luaL_Reg *l) { 798dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int size = 0; 799dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com for (; l && l->name; l++) size++; 800dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return size; 801dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 802dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 803dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 804dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* 805dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** Find or create a module table with a given name. The function 806dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** first looks at the _LOADED table and, if that fails, try a 807dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** global variable with that name. In any case, leaves on the stack 808dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** the module table. 809dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com*/ 810dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API void luaL_pushmodule (lua_State *L, const char *modname, 811dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int sizehint) { 812dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_findtable(L, LUA_REGISTRYINDEX, "_LOADED", 1); /* get _LOADED table */ 813dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_getfield(L, -1, modname); /* get _LOADED[modname] */ 814dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (!lua_istable(L, -1)) { /* not found? */ 815dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pop(L, 1); /* remove previous result */ 816dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com /* try global variable (and create one if it does not exist) */ 817dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushglobaltable(L); 818dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (luaL_findtable(L, 0, modname, sizehint) != NULL) 819dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_error(L, "name conflict for module " LUA_QS, modname); 820dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushvalue(L, -1); 821dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_setfield(L, -3, modname); /* _LOADED[modname] = new table */ 822dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 823dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_remove(L, -2); /* remove _LOADED table */ 824dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 825dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 826dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 827dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API void luaL_openlib (lua_State *L, const char *libname, 828dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com const luaL_Reg *l, int nup) { 829dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_checkversion(L); 830dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (libname) { 831dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_pushmodule(L, libname, libsize(l)); /* get/create library table */ 832dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_insert(L, -(nup + 1)); /* move library table to below upvalues */ 833dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 834dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (l) 835dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_setfuncs(L, l, nup); 836dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else 837dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pop(L, nup); /* remove upvalues */ 838dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 839dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 840dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#endif 841dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* }====================================================== */ 842dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 843dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* 844dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** set functions from list 'l' into table at top - 'nup'; each 845dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** function gets the 'nup' elements at the top as upvalues. 846dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** Returns with only the table at the stack. 847dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com*/ 848dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) { 849dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_checkversion(L); 850dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_checkstack(L, nup, "too many upvalues"); 851dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com for (; l->name != NULL; l++) { /* fill the table with given functions */ 852dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int i; 853dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com for (i = 0; i < nup; i++) /* copy upvalues to the top */ 854dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushvalue(L, -nup); 855dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushcclosure(L, l->func, nup); /* closure with those upvalues */ 856dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_setfield(L, -(nup + 2), l->name); 857dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 858dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pop(L, nup); /* remove upvalues */ 859dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 860dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 861dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 862dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* 863dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** ensure that stack[idx][fname] has a table and push that table 864dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** into the stack 865dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com*/ 866dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API int luaL_getsubtable (lua_State *L, int idx, const char *fname) { 867dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_getfield(L, idx, fname); 868dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (lua_istable(L, -1)) return 1; /* table already there */ 869dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else { 870dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pop(L, 1); /* remove previous result */ 871dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com idx = lua_absindex(L, idx); 872dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_newtable(L); 873dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushvalue(L, -1); /* copy to be left at top */ 874dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_setfield(L, idx, fname); /* assign new table to field */ 875dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return 0; /* false, because did not find table there */ 876dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 877dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 878dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 879dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 880dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* 881dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** stripped-down 'require'. Calls 'openf' to open a module, 882dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** registers the result in 'package.loaded' table and, if 'glb' 883dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** is true, also registers the result in the global table. 884dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com** Leaves resulting module on the top. 885dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com*/ 886dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API void luaL_requiref (lua_State *L, const char *modname, 887dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_CFunction openf, int glb) { 888dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushcfunction(L, openf); 889dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushstring(L, modname); /* argument to open function */ 890dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_call(L, 1, 1); /* open module */ 891dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_getsubtable(L, LUA_REGISTRYINDEX, "_LOADED"); 892dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushvalue(L, -2); /* make copy of module (call result) */ 893dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_setfield(L, -2, modname); /* _LOADED[modname] = module */ 894dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pop(L, 1); /* remove _LOADED table */ 895dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (glb) { 896dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushvalue(L, -1); /* copy of 'mod' */ 897dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_setglobal(L, modname); /* _G[modname] = module */ 898dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 899dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 900dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 901dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 902dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API const char *luaL_gsub (lua_State *L, const char *s, const char *p, 903dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com const char *r) { 904dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com const char *wild; 905dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com size_t l = strlen(p); 906dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_Buffer b; 907dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_buffinit(L, &b); 908dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com while ((wild = strstr(s, p)) != NULL) { 909dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_addlstring(&b, s, wild - s); /* push prefix */ 910dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_addstring(&b, r); /* push replacement in place of pattern */ 911dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com s = wild + l; /* continue after `p' */ 912dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 913dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_addstring(&b, s); /* push last suffix */ 914dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_pushresult(&b); 915dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return lua_tostring(L, -1); 916dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 917dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 918dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 919dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comstatic void *l_alloc (void *ud, void *ptr, size_t osize, size_t nsize) { 920dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com (void)ud; (void)osize; /* not used */ 921dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (nsize == 0) { 922dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com free(ptr); 923dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return NULL; 924dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 925dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else 926dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return realloc(ptr, nsize); 927dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 928dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 929dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 930dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comstatic int panic (lua_State *L) { 931dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luai_writestringerror("PANIC: unprotected error in call to Lua API (%s)\n", 932dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_tostring(L, -1)); 933dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return 0; /* return to Lua to abort */ 934dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 935dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 936dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 937dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API lua_State *luaL_newstate (void) { 938dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_State *L = lua_newstate(l_alloc, NULL); 939dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (L) lua_atpanic(L, &panic); 940dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return L; 941dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 942dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 943dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 944dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comLUALIB_API void luaL_checkversion_ (lua_State *L, lua_Number ver) { 945dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com const lua_Number *v = lua_version(L); 946dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (v != lua_version(NULL)) 947dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_error(L, "multiple Lua VMs detected"); 948dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else if (*v != ver) 949dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_error(L, "version mismatch: app. needs %f, Lua core provides %f", 950dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com ver, *v); 951dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com /* check conversions number -> integer types */ 952dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pushnumber(L, -(lua_Number)0x1234); 953dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (lua_tointeger(L, -1) != -0x1234 || 954dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_tounsigned(L, -1) != (lua_Unsigned)-0x1234) 955dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com luaL_error(L, "bad conversion number->int;" 956dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com " must recompile Lua with proper settings"); 957dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com lua_pop(L, 1); 958dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 959dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 960