11d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* 21d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** $Id: lauxlib.c,v 1.248 2013/03/21 13:54:57 roberto Exp $ 31d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** Auxiliary functions for building Lua libraries 41d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** See Copyright Notice in lua.h 51d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III*/ 61d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 71d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 81d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#include <errno.h> 91d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#include <stdarg.h> 101d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#include <stdio.h> 111d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#include <stdlib.h> 121d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#include <string.h> 131d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 141d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 151d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* This file uses only the official API of Lua. 161d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** Any function declared here could be written as an application function. 171d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III*/ 181d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 191d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#define lauxlib_c 201d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#define LUA_LIB 211d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 221d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#include "lua.h" 231d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 241d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#include "lauxlib.h" 251d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 261d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 271d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* 281d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** {====================================================== 291d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** Traceback 301d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** ======================================================= 311d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III*/ 321d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 331d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 341d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#define LEVELS1 12 /* size of the first part of the stack */ 351d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#define LEVELS2 10 /* size of the second part of the stack */ 361d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 371d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 381d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 391d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* 401d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** search for 'objidx' in table at index -1. 411d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** return 1 + string at top if find a good name. 421d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III*/ 431d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIIstatic int findfield (lua_State *L, int objidx, int level) { 441d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (level == 0 || !lua_istable(L, -1)) 451d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return 0; /* not found */ 461d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushnil(L); /* start 'next' loop */ 471d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III while (lua_next(L, -2)) { /* for each pair in table */ 481d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (lua_type(L, -2) == LUA_TSTRING) { /* ignore non-string keys */ 491d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (lua_rawequal(L, objidx, -1)) { /* found object? */ 501d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pop(L, 1); /* remove value (but keep name) */ 511d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return 1; 521d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 531d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else if (findfield(L, objidx, level - 1)) { /* try recursively */ 541d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_remove(L, -2); /* remove table (but keep name) */ 551d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushliteral(L, "."); 561d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_insert(L, -2); /* place '.' between the two names */ 571d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_concat(L, 3); 581d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return 1; 591d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 601d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 611d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pop(L, 1); /* remove value */ 621d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 631d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return 0; /* not found */ 641d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 651d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 661d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 671d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIIstatic int pushglobalfuncname (lua_State *L, lua_Debug *ar) { 681d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int top = lua_gettop(L); 691d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_getinfo(L, "f", ar); /* push function */ 701d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushglobaltable(L); 711d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (findfield(L, top + 1, 2)) { 721d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_copy(L, -1, top + 1); /* move name to proper place */ 731d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pop(L, 2); /* remove pushed values */ 741d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return 1; 751d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 761d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else { 771d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_settop(L, top); /* remove function and global table */ 781d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return 0; 791d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 801d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 811d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 821d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 831d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIIstatic void pushfuncname (lua_State *L, lua_Debug *ar) { 841d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (*ar->namewhat != '\0') /* is there a name? */ 851d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushfstring(L, "function " LUA_QS, ar->name); 861d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else if (*ar->what == 'm') /* main? */ 871d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushliteral(L, "main chunk"); 881d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else if (*ar->what == 'C') { 891d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (pushglobalfuncname(L, ar)) { 901d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushfstring(L, "function " LUA_QS, lua_tostring(L, -1)); 911d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_remove(L, -2); /* remove name */ 921d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 931d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else 941d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushliteral(L, "?"); 951d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 961d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else 971d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushfstring(L, "function <%s:%d>", ar->short_src, ar->linedefined); 981d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 991d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 1001d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 1011d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIIstatic int countlevels (lua_State *L) { 1021d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_Debug ar; 1031d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int li = 1, le = 1; 1041d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III /* find an upper bound */ 1051d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III while (lua_getstack(L, le, &ar)) { li = le; le *= 2; } 1061d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III /* do a binary search */ 1071d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III while (li < le) { 1081d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int m = (li + le)/2; 1091d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (lua_getstack(L, m, &ar)) li = m + 1; 1101d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else le = m; 1111d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 1121d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return le - 1; 1131d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 1141d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 1151d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 1161d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API void luaL_traceback (lua_State *L, lua_State *L1, 1171d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III const char *msg, int level) { 1181d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_Debug ar; 1191d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int top = lua_gettop(L); 1201d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int numlevels = countlevels(L1); 1211d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int mark = (numlevels > LEVELS1 + LEVELS2) ? LEVELS1 : 0; 1221d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (msg) lua_pushfstring(L, "%s\n", msg); 1231d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushliteral(L, "stack traceback:"); 1241d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III while (lua_getstack(L1, level++, &ar)) { 1251d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (level == mark) { /* too many levels? */ 1261d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushliteral(L, "\n\t..."); /* add a '...' */ 1271d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III level = numlevels - LEVELS2; /* and skip to last ones */ 1281d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 1291d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else { 1301d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_getinfo(L1, "Slnt", &ar); 1311d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushfstring(L, "\n\t%s:", ar.short_src); 1321d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (ar.currentline > 0) 1331d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushfstring(L, "%d:", ar.currentline); 1341d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushliteral(L, " in "); 1351d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III pushfuncname(L, &ar); 1361d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (ar.istailcall) 1371d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushliteral(L, "\n\t(...tail calls...)"); 1381d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_concat(L, lua_gettop(L) - top); 1391d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 1401d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 1411d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_concat(L, lua_gettop(L) - top); 1421d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 1431d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 1441d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* }====================================================== */ 1451d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 1461d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 1471d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* 1481d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** {====================================================== 1491d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** Error-report functions 1501d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** ======================================================= 1511d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III*/ 1521d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 1531d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API int luaL_argerror (lua_State *L, int narg, const char *extramsg) { 1541d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_Debug ar; 1551d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (!lua_getstack(L, 0, &ar)) /* no stack frame? */ 1561d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return luaL_error(L, "bad argument #%d (%s)", narg, extramsg); 1571d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_getinfo(L, "n", &ar); 1581d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (strcmp(ar.namewhat, "method") == 0) { 1591d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III narg--; /* do not count `self' */ 1601d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (narg == 0) /* error is in the self argument itself? */ 1611d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return luaL_error(L, "calling " LUA_QS " on bad self (%s)", 1621d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III ar.name, extramsg); 1631d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 1641d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (ar.name == NULL) 1651d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III ar.name = (pushglobalfuncname(L, &ar)) ? lua_tostring(L, -1) : "?"; 1661d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return luaL_error(L, "bad argument #%d to " LUA_QS " (%s)", 1671d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III narg, ar.name, extramsg); 1681d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 1691d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 1701d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 1711d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIIstatic int typeerror (lua_State *L, int narg, const char *tname) { 1721d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III const char *msg = lua_pushfstring(L, "%s expected, got %s", 1731d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III tname, luaL_typename(L, narg)); 1741d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return luaL_argerror(L, narg, msg); 1751d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 1761d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 1771d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 1781d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIIstatic void tag_error (lua_State *L, int narg, int tag) { 1791d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III typeerror(L, narg, lua_typename(L, tag)); 1801d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 1811d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 1821d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 1831d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API void luaL_where (lua_State *L, int level) { 1841d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_Debug ar; 1851d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (lua_getstack(L, level, &ar)) { /* check function at level */ 1861d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_getinfo(L, "Sl", &ar); /* get info about it */ 1871d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (ar.currentline > 0) { /* is there info? */ 1881d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushfstring(L, "%s:%d: ", ar.short_src, ar.currentline); 1891d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return; 1901d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 1911d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 1921d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushliteral(L, ""); /* else, no information available... */ 1931d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 1941d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 1951d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 1961d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API int luaL_error (lua_State *L, const char *fmt, ...) { 1971d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III va_list argp; 1981d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III va_start(argp, fmt); 1991d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_where(L, 1); 2001d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushvfstring(L, fmt, argp); 2011d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III va_end(argp); 2021d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_concat(L, 2); 2031d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return lua_error(L); 2041d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 2051d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 2061d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 2071d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API int luaL_fileresult (lua_State *L, int stat, const char *fname) { 2081d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int en = errno; /* calls to Lua API may change this value */ 2091d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (stat) { 2101d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushboolean(L, 1); 2111d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return 1; 2121d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 2131d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else { 2141d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushnil(L); 2151d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (fname) 2161d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushfstring(L, "%s: %s", fname, strerror(en)); 2171d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else 2181d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushstring(L, strerror(en)); 2191d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushinteger(L, en); 2201d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return 3; 2211d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 2221d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 2231d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 2241d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 2251d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#if !defined(inspectstat) /* { */ 2261d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 2271d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#if defined(LUA_USE_POSIX) 2281d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 2291d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#include <sys/wait.h> 2301d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 2311d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* 2321d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** use appropriate macros to interpret 'pclose' return status 2331d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III*/ 2341d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#define inspectstat(stat,what) \ 2351d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (WIFEXITED(stat)) { stat = WEXITSTATUS(stat); } \ 2361d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else if (WIFSIGNALED(stat)) { stat = WTERMSIG(stat); what = "signal"; } 2371d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 2381d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#else 2391d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 2401d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#define inspectstat(stat,what) /* no op */ 2411d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 2421d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#endif 2431d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 2441d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#endif /* } */ 2451d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 2461d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 2471d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API int luaL_execresult (lua_State *L, int stat) { 2481d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III const char *what = "exit"; /* type of termination */ 2491d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (stat == -1) /* error? */ 2501d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return luaL_fileresult(L, 0, NULL); 2511d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else { 2521d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III inspectstat(stat, what); /* interpret result */ 2531d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (*what == 'e' && stat == 0) /* successful termination? */ 2541d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushboolean(L, 1); 2551d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else 2561d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushnil(L); 2571d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushstring(L, what); 2581d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushinteger(L, stat); 2591d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return 3; /* return true/nil,what,code */ 2601d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 2611d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 2621d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 2631d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* }====================================================== */ 2641d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 2651d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 2661d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* 2671d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** {====================================================== 2681d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** Userdata's metatable manipulation 2691d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** ======================================================= 2701d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III*/ 2711d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 2721d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API int luaL_newmetatable (lua_State *L, const char *tname) { 2731d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_getmetatable(L, tname); /* try to get metatable */ 2741d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (!lua_isnil(L, -1)) /* name already in use? */ 2751d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return 0; /* leave previous value on top, but return 0 */ 2761d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pop(L, 1); 2771d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_newtable(L); /* create metatable */ 2781d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushvalue(L, -1); 2791d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_setfield(L, LUA_REGISTRYINDEX, tname); /* registry.name = metatable */ 2801d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return 1; 2811d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 2821d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 2831d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 2841d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API void luaL_setmetatable (lua_State *L, const char *tname) { 2851d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_getmetatable(L, tname); 2861d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_setmetatable(L, -2); 2871d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 2881d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 2891d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 2901d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API void *luaL_testudata (lua_State *L, int ud, const char *tname) { 2911d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III void *p = lua_touserdata(L, ud); 2921d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (p != NULL) { /* value is a userdata? */ 2931d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (lua_getmetatable(L, ud)) { /* does it have a metatable? */ 2941d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_getmetatable(L, tname); /* get correct metatable */ 2951d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (!lua_rawequal(L, -1, -2)) /* not the same? */ 2961d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III p = NULL; /* value is a userdata with wrong metatable */ 2971d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pop(L, 2); /* remove both metatables */ 2981d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return p; 2991d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 3001d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 3011d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return NULL; /* value is not a userdata with a metatable */ 3021d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 3031d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3041d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3051d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API void *luaL_checkudata (lua_State *L, int ud, const char *tname) { 3061d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III void *p = luaL_testudata(L, ud, tname); 3071d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (p == NULL) typeerror(L, ud, tname); 3081d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return p; 3091d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 3101d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3111d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* }====================================================== */ 3121d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3131d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3141d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* 3151d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** {====================================================== 3161d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** Argument check functions 3171d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** ======================================================= 3181d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III*/ 3191d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3201d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API int luaL_checkoption (lua_State *L, int narg, const char *def, 3211d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III const char *const lst[]) { 3221d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III const char *name = (def) ? luaL_optstring(L, narg, def) : 3231d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_checkstring(L, narg); 3241d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int i; 3251d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III for (i=0; lst[i]; i++) 3261d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (strcmp(lst[i], name) == 0) 3271d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return i; 3281d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return luaL_argerror(L, narg, 3291d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushfstring(L, "invalid option " LUA_QS, name)); 3301d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 3311d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3321d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3331d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API void luaL_checkstack (lua_State *L, int space, const char *msg) { 3341d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III /* keep some extra space to run error routines, if needed */ 3351d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III const int extra = LUA_MINSTACK; 3361d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (!lua_checkstack(L, space + extra)) { 3371d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (msg) 3381d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_error(L, "stack overflow (%s)", msg); 3391d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else 3401d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_error(L, "stack overflow"); 3411d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 3421d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 3431d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3441d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3451d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API void luaL_checktype (lua_State *L, int narg, int t) { 3461d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (lua_type(L, narg) != t) 3471d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III tag_error(L, narg, t); 3481d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 3491d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3501d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3511d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API void luaL_checkany (lua_State *L, int narg) { 3521d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (lua_type(L, narg) == LUA_TNONE) 3531d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_argerror(L, narg, "value expected"); 3541d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 3551d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3561d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3571d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API const char *luaL_checklstring (lua_State *L, int narg, size_t *len) { 3581d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III const char *s = lua_tolstring(L, narg, len); 3591d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (!s) tag_error(L, narg, LUA_TSTRING); 3601d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return s; 3611d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 3621d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3631d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3641d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API const char *luaL_optlstring (lua_State *L, int narg, 3651d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III const char *def, size_t *len) { 3661d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (lua_isnoneornil(L, narg)) { 3671d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (len) 3681d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III *len = (def ? strlen(def) : 0); 3691d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return def; 3701d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 3711d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else return luaL_checklstring(L, narg, len); 3721d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 3731d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3741d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3751d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API lua_Number luaL_checknumber (lua_State *L, int narg) { 3761d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int isnum; 3771d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_Number d = lua_tonumberx(L, narg, &isnum); 3781d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (!isnum) 3791d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III tag_error(L, narg, LUA_TNUMBER); 3801d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return d; 3811d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 3821d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3831d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3841d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API lua_Number luaL_optnumber (lua_State *L, int narg, lua_Number def) { 3851d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return luaL_opt(L, luaL_checknumber, narg, def); 3861d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 3871d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3881d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3891d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API lua_Integer luaL_checkinteger (lua_State *L, int narg) { 3901d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int isnum; 3911d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_Integer d = lua_tointegerx(L, narg, &isnum); 3921d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (!isnum) 3931d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III tag_error(L, narg, LUA_TNUMBER); 3941d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return d; 3951d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 3961d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3971d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 3981d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API lua_Unsigned luaL_checkunsigned (lua_State *L, int narg) { 3991d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int isnum; 4001d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_Unsigned d = lua_tounsignedx(L, narg, &isnum); 4011d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (!isnum) 4021d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III tag_error(L, narg, LUA_TNUMBER); 4031d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return d; 4041d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 4051d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 4061d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 4071d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API lua_Integer luaL_optinteger (lua_State *L, int narg, 4081d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_Integer def) { 4091d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return luaL_opt(L, luaL_checkinteger, narg, def); 4101d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 4111d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 4121d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 4131d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API lua_Unsigned luaL_optunsigned (lua_State *L, int narg, 4141d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_Unsigned def) { 4151d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return luaL_opt(L, luaL_checkunsigned, narg, def); 4161d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 4171d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 4181d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* }====================================================== */ 4191d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 4201d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 4211d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* 4221d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** {====================================================== 4231d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** Generic Buffer manipulation 4241d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** ======================================================= 4251d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III*/ 4261d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 4271d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* 4281d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** check whether buffer is using a userdata on the stack as a temporary 4291d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** buffer 4301d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III*/ 4311d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#define buffonstack(B) ((B)->b != (B)->initb) 4321d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 4331d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 4341d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* 4351d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** returns a pointer to a free area with at least 'sz' bytes 4361d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III*/ 4371d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API char *luaL_prepbuffsize (luaL_Buffer *B, size_t sz) { 4381d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_State *L = B->L; 4391d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (B->size - B->n < sz) { /* not enough space? */ 4401d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III char *newbuff; 4411d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III size_t newsize = B->size * 2; /* double buffer size */ 4421d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (newsize - B->n < sz) /* not big enough? */ 4431d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III newsize = B->n + sz; 4441d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (newsize < B->n || newsize - B->n < sz) 4451d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_error(L, "buffer too large"); 4461d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III /* create larger buffer */ 4471d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III newbuff = (char *)lua_newuserdata(L, newsize * sizeof(char)); 4481d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III /* move content to new buffer */ 4491d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III memcpy(newbuff, B->b, B->n * sizeof(char)); 4501d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (buffonstack(B)) 4511d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_remove(L, -2); /* remove old buffer */ 4521d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III B->b = newbuff; 4531d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III B->size = newsize; 4541d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 4551d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return &B->b[B->n]; 4561d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 4571d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 4581d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 4591d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API void luaL_addlstring (luaL_Buffer *B, const char *s, size_t l) { 4601d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III char *b = luaL_prepbuffsize(B, l); 4611d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III memcpy(b, s, l * sizeof(char)); 4621d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_addsize(B, l); 4631d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 4641d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 4651d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 4661d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API void luaL_addstring (luaL_Buffer *B, const char *s) { 4671d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_addlstring(B, s, strlen(s)); 4681d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 4691d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 4701d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 4711d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API void luaL_pushresult (luaL_Buffer *B) { 4721d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_State *L = B->L; 4731d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushlstring(L, B->b, B->n); 4741d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (buffonstack(B)) 4751d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_remove(L, -2); /* remove old buffer */ 4761d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 4771d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 4781d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 4791d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API void luaL_pushresultsize (luaL_Buffer *B, size_t sz) { 4801d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_addsize(B, sz); 4811d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_pushresult(B); 4821d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 4831d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 4841d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 4851d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API void luaL_addvalue (luaL_Buffer *B) { 4861d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_State *L = B->L; 4871d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III size_t l; 4881d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III const char *s = lua_tolstring(L, -1, &l); 4891d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (buffonstack(B)) 4901d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_insert(L, -2); /* put value below buffer */ 4911d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_addlstring(B, s, l); 4921d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_remove(L, (buffonstack(B)) ? -2 : -1); /* remove value */ 4931d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 4941d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 4951d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 4961d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API void luaL_buffinit (lua_State *L, luaL_Buffer *B) { 4971d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III B->L = L; 4981d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III B->b = B->initb; 4991d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III B->n = 0; 5001d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III B->size = LUAL_BUFFERSIZE; 5011d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 5021d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 5031d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 5041d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API char *luaL_buffinitsize (lua_State *L, luaL_Buffer *B, size_t sz) { 5051d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_buffinit(L, B); 5061d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return luaL_prepbuffsize(B, sz); 5071d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 5081d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 5091d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* }====================================================== */ 5101d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 5111d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 5121d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* 5131d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** {====================================================== 5141d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** Reference system 5151d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** ======================================================= 5161d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III*/ 5171d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 5181d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* index of free-list header */ 5191d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#define freelist 0 5201d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 5211d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 5221d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API int luaL_ref (lua_State *L, int t) { 5231d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int ref; 5241d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (lua_isnil(L, -1)) { 5251d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pop(L, 1); /* remove from stack */ 5261d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return LUA_REFNIL; /* `nil' has a unique fixed reference */ 5271d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 5281d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III t = lua_absindex(L, t); 5291d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_rawgeti(L, t, freelist); /* get first free element */ 5301d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III ref = (int)lua_tointeger(L, -1); /* ref = t[freelist] */ 5311d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pop(L, 1); /* remove it from stack */ 5321d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (ref != 0) { /* any free element? */ 5331d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_rawgeti(L, t, ref); /* remove it from list */ 5341d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_rawseti(L, t, freelist); /* (t[freelist] = t[ref]) */ 5351d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 5361d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else /* no free elements */ 5371d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III ref = (int)lua_rawlen(L, t) + 1; /* get a new reference */ 5381d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_rawseti(L, t, ref); 5391d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return ref; 5401d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 5411d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 5421d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 5431d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API void luaL_unref (lua_State *L, int t, int ref) { 5441d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (ref >= 0) { 5451d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III t = lua_absindex(L, t); 5461d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_rawgeti(L, t, freelist); 5471d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_rawseti(L, t, ref); /* t[ref] = t[freelist] */ 5481d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushinteger(L, ref); 5491d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_rawseti(L, t, freelist); /* t[freelist] = ref */ 5501d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 5511d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 5521d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 5531d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* }====================================================== */ 5541d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 5551d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 5561d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* 5571d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** {====================================================== 5581d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** Load functions 5591d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** ======================================================= 5601d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III*/ 5611d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 5621d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIItypedef struct LoadF { 5631d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int n; /* number of pre-read characters */ 5641d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III FILE *f; /* file being read */ 5651d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III char buff[LUAL_BUFFERSIZE]; /* area for reading file */ 5661d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} LoadF; 5671d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 5681d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 5691d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIIstatic const char *getF (lua_State *L, void *ud, size_t *size) { 5701d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III LoadF *lf = (LoadF *)ud; 5711d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III (void)L; /* not used */ 5721d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (lf->n > 0) { /* are there pre-read characters to be read? */ 5731d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III *size = lf->n; /* return them (chars already in buffer) */ 5741d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lf->n = 0; /* no more pre-read characters */ 5751d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 5761d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else { /* read a block from file */ 5771d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III /* 'fread' can return > 0 *and* set the EOF flag. If next call to 5781d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 'getF' called 'fread', it might still wait for user input. 5791d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III The next check avoids this problem. */ 5801d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (feof(lf->f)) return NULL; 5811d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III *size = fread(lf->buff, 1, sizeof(lf->buff), lf->f); /* read block */ 5821d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 5831d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return lf->buff; 5841d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 5851d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 5861d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 5871d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIIstatic int errfile (lua_State *L, const char *what, int fnameindex) { 5881d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III const char *serr = strerror(errno); 5891d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III const char *filename = lua_tostring(L, fnameindex) + 1; 5901d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushfstring(L, "cannot %s %s: %s", what, filename, serr); 5911d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_remove(L, fnameindex); 5921d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return LUA_ERRFILE; 5931d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 5941d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 5951d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 5961d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIIstatic int skipBOM (LoadF *lf) { 5971d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III const char *p = "\xEF\xBB\xBF"; /* Utf8 BOM mark */ 5981d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int c; 5991d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lf->n = 0; 6001d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III do { 6011d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III c = getc(lf->f); 6021d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (c == EOF || c != *(const unsigned char *)p++) return c; 6031d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lf->buff[lf->n++] = c; /* to be read by the parser */ 6041d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } while (*p != '\0'); 6051d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lf->n = 0; /* prefix matched; discard it */ 6061d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return getc(lf->f); /* return next character */ 6071d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 6081d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 6091d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 6101d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* 6111d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** reads the first character of file 'f' and skips an optional BOM mark 6121d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** in its beginning plus its first line if it starts with '#'. Returns 6131d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** true if it skipped the first line. In any case, '*cp' has the 6141d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** first "valid" character of the file (after the optional BOM and 6151d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** a first-line comment). 6161d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III*/ 6171d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIIstatic int skipcomment (LoadF *lf, int *cp) { 6181d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int c = *cp = skipBOM(lf); 6191d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (c == '#') { /* first line is a comment (Unix exec. file)? */ 6201d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III do { /* skip first line */ 6211d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III c = getc(lf->f); 6221d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } while (c != EOF && c != '\n') ; 6231d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III *cp = getc(lf->f); /* skip end-of-line, if present */ 6241d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return 1; /* there was a comment */ 6251d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 6261d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else return 0; /* no comment */ 6271d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 6281d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 6291d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 6301d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API int luaL_loadfilex (lua_State *L, const char *filename, 6311d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III const char *mode) { 6321d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III LoadF lf; 6331d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int status, readstatus; 6341d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int c; 6351d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int fnameindex = lua_gettop(L) + 1; /* index of filename on the stack */ 6361d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (filename == NULL) { 6371d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushliteral(L, "=stdin"); 6381d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lf.f = stdin; 6391d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 6401d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else { 6411d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushfstring(L, "@%s", filename); 6421d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lf.f = fopen(filename, "r"); 6431d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (lf.f == NULL) return errfile(L, "open", fnameindex); 6441d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 6451d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (skipcomment(&lf, &c)) /* read initial portion */ 6461d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lf.buff[lf.n++] = '\n'; /* add line to correct line numbers */ 6471d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (c == LUA_SIGNATURE[0] && filename) { /* binary file? */ 6481d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lf.f = freopen(filename, "rb", lf.f); /* reopen in binary mode */ 6491d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (lf.f == NULL) return errfile(L, "reopen", fnameindex); 6501d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III skipcomment(&lf, &c); /* re-read initial portion */ 6511d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 6521d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (c != EOF) 6531d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lf.buff[lf.n++] = c; /* 'c' is the first character of the stream */ 6541d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III status = lua_load(L, getF, &lf, lua_tostring(L, -1), mode); 6551d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III readstatus = ferror(lf.f); 6561d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (filename) fclose(lf.f); /* close file (even in case of errors) */ 6571d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (readstatus) { 6581d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_settop(L, fnameindex); /* ignore results from `lua_load' */ 6591d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return errfile(L, "read", fnameindex); 6601d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 6611d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_remove(L, fnameindex); 6621d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return status; 6631d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 6641d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 6651d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 6661d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIItypedef struct LoadS { 6671d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III const char *s; 6681d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III size_t size; 6691d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} LoadS; 6701d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 6711d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 6721d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIIstatic const char *getS (lua_State *L, void *ud, size_t *size) { 6731d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III LoadS *ls = (LoadS *)ud; 6741d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III (void)L; /* not used */ 6751d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (ls->size == 0) return NULL; 6761d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III *size = ls->size; 6771d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III ls->size = 0; 6781d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return ls->s; 6791d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 6801d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 6811d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 6821d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API int luaL_loadbufferx (lua_State *L, const char *buff, size_t size, 6831d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III const char *name, const char *mode) { 6841d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III LoadS ls; 6851d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III ls.s = buff; 6861d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III ls.size = size; 6871d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return lua_load(L, getS, &ls, name, mode); 6881d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 6891d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 6901d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 6911d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API int luaL_loadstring (lua_State *L, const char *s) { 6921d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return luaL_loadbuffer(L, s, strlen(s), s); 6931d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 6941d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 6951d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* }====================================================== */ 6961d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 6971d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 6981d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 6991d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API int luaL_getmetafield (lua_State *L, int obj, const char *event) { 7001d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (!lua_getmetatable(L, obj)) /* no metatable? */ 7011d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return 0; 7021d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushstring(L, event); 7031d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_rawget(L, -2); 7041d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (lua_isnil(L, -1)) { 7051d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pop(L, 2); /* remove metatable and metafield */ 7061d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return 0; 7071d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 7081d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else { 7091d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_remove(L, -2); /* remove only metatable */ 7101d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return 1; 7111d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 7121d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 7131d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 7141d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 7151d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *event) { 7161d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III obj = lua_absindex(L, obj); 7171d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (!luaL_getmetafield(L, obj, event)) /* no metafield? */ 7181d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return 0; 7191d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushvalue(L, obj); 7201d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_call(L, 1, 1); 7211d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return 1; 7221d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 7231d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 7241d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 7251d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API int luaL_len (lua_State *L, int idx) { 7261d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int l; 7271d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int isnum; 7281d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_len(L, idx); 7291d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III l = (int)lua_tointegerx(L, -1, &isnum); 7301d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (!isnum) 7311d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_error(L, "object length is not a number"); 7321d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pop(L, 1); /* remove object */ 7331d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return l; 7341d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 7351d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 7361d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 7371d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API const char *luaL_tolstring (lua_State *L, int idx, size_t *len) { 7381d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (!luaL_callmeta(L, idx, "__tostring")) { /* no metafield? */ 7391d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III switch (lua_type(L, idx)) { 7401d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III case LUA_TNUMBER: 7411d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III case LUA_TSTRING: 7421d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushvalue(L, idx); 7431d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III break; 7441d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III case LUA_TBOOLEAN: 7451d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushstring(L, (lua_toboolean(L, idx) ? "true" : "false")); 7461d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III break; 7471d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III case LUA_TNIL: 7481d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushliteral(L, "nil"); 7491d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III break; 7501d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III default: 7511d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushfstring(L, "%s: %p", luaL_typename(L, idx), 7521d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_topointer(L, idx)); 7531d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III break; 7541d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 7551d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 7561d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return lua_tolstring(L, -1, len); 7571d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 7581d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 7591d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 7601d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* 7611d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** {====================================================== 7621d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** Compatibility with 5.1 module functions 7631d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** ======================================================= 7641d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III*/ 7651d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#if defined(LUA_COMPAT_MODULE) 7661d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 7671d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIIstatic const char *luaL_findtable (lua_State *L, int idx, 7681d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III const char *fname, int szhint) { 7691d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III const char *e; 7701d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (idx) lua_pushvalue(L, idx); 7711d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III do { 7721d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III e = strchr(fname, '.'); 7731d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (e == NULL) e = fname + strlen(fname); 7741d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushlstring(L, fname, e - fname); 7751d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_rawget(L, -2); 7761d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (lua_isnil(L, -1)) { /* no such field? */ 7771d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pop(L, 1); /* remove this nil */ 7781d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_createtable(L, 0, (*e == '.' ? 1 : szhint)); /* new table for field */ 7791d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushlstring(L, fname, e - fname); 7801d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushvalue(L, -2); 7811d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_settable(L, -4); /* set new table into field */ 7821d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 7831d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else if (!lua_istable(L, -1)) { /* field has a non-table value? */ 7841d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pop(L, 2); /* remove table and value */ 7851d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return fname; /* return problematic part of the name */ 7861d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 7871d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_remove(L, -2); /* remove previous table */ 7881d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III fname = e + 1; 7891d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } while (*e == '.'); 7901d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return NULL; 7911d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 7921d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 7931d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 7941d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* 7951d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** Count number of elements in a luaL_Reg list. 7961d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III*/ 7971d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIIstatic int libsize (const luaL_Reg *l) { 7981d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int size = 0; 7991d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III for (; l && l->name; l++) size++; 8001d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return size; 8011d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 8021d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 8031d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 8041d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* 8051d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** Find or create a module table with a given name. The function 8061d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** first looks at the _LOADED table and, if that fails, try a 8071d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** global variable with that name. In any case, leaves on the stack 8081d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** the module table. 8091d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III*/ 8101d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API void luaL_pushmodule (lua_State *L, const char *modname, 8111d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int sizehint) { 8121d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_findtable(L, LUA_REGISTRYINDEX, "_LOADED", 1); /* get _LOADED table */ 8131d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_getfield(L, -1, modname); /* get _LOADED[modname] */ 8141d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (!lua_istable(L, -1)) { /* not found? */ 8151d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pop(L, 1); /* remove previous result */ 8161d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III /* try global variable (and create one if it does not exist) */ 8171d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushglobaltable(L); 8181d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (luaL_findtable(L, 0, modname, sizehint) != NULL) 8191d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_error(L, "name conflict for module " LUA_QS, modname); 8201d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushvalue(L, -1); 8211d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_setfield(L, -3, modname); /* _LOADED[modname] = new table */ 8221d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 8231d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_remove(L, -2); /* remove _LOADED table */ 8241d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 8251d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 8261d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 8271d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API void luaL_openlib (lua_State *L, const char *libname, 8281d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III const luaL_Reg *l, int nup) { 8291d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_checkversion(L); 8301d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (libname) { 8311d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_pushmodule(L, libname, libsize(l)); /* get/create library table */ 8321d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_insert(L, -(nup + 1)); /* move library table to below upvalues */ 8331d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 8341d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (l) 8351d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_setfuncs(L, l, nup); 8361d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else 8371d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pop(L, nup); /* remove upvalues */ 8381d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 8391d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 8401d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III#endif 8411d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* }====================================================== */ 8421d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 8431d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* 8441d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** set functions from list 'l' into table at top - 'nup'; each 8451d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** function gets the 'nup' elements at the top as upvalues. 8461d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** Returns with only the table at the stack. 8471d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III*/ 8481d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) { 8491d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_checkversion(L); 8501d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_checkstack(L, nup, "too many upvalues"); 8511d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III for (; l->name != NULL; l++) { /* fill the table with given functions */ 8521d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III int i; 8531d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III for (i = 0; i < nup; i++) /* copy upvalues to the top */ 8541d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushvalue(L, -nup); 8551d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushcclosure(L, l->func, nup); /* closure with those upvalues */ 8561d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_setfield(L, -(nup + 2), l->name); 8571d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 8581d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pop(L, nup); /* remove upvalues */ 8591d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 8601d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 8611d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 8621d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* 8631d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** ensure that stack[idx][fname] has a table and push that table 8641d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** into the stack 8651d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III*/ 8661d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API int luaL_getsubtable (lua_State *L, int idx, const char *fname) { 8671d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_getfield(L, idx, fname); 8681d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (lua_istable(L, -1)) return 1; /* table already there */ 8691d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else { 8701d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pop(L, 1); /* remove previous result */ 8711d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III idx = lua_absindex(L, idx); 8721d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_newtable(L); 8731d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushvalue(L, -1); /* copy to be left at top */ 8741d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_setfield(L, idx, fname); /* assign new table to field */ 8751d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return 0; /* false, because did not find table there */ 8761d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 8771d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 8781d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 8791d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 8801d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III/* 8811d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** stripped-down 'require'. Calls 'openf' to open a module, 8821d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** registers the result in 'package.loaded' table and, if 'glb' 8831d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** is true, also registers the result in the global table. 8841d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III** Leaves resulting module on the top. 8851d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III*/ 8861d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API void luaL_requiref (lua_State *L, const char *modname, 8871d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_CFunction openf, int glb) { 8881d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushcfunction(L, openf); 8891d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushstring(L, modname); /* argument to open function */ 8901d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_call(L, 1, 1); /* open module */ 8911d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_getsubtable(L, LUA_REGISTRYINDEX, "_LOADED"); 8921d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushvalue(L, -2); /* make copy of module (call result) */ 8931d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_setfield(L, -2, modname); /* _LOADED[modname] = module */ 8941d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pop(L, 1); /* remove _LOADED table */ 8951d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (glb) { 8961d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushvalue(L, -1); /* copy of 'mod' */ 8971d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_setglobal(L, modname); /* _G[modname] = module */ 8981d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 8991d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 9001d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 9011d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 9021d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API const char *luaL_gsub (lua_State *L, const char *s, const char *p, 9031d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III const char *r) { 9041d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III const char *wild; 9051d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III size_t l = strlen(p); 9061d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_Buffer b; 9071d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_buffinit(L, &b); 9081d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III while ((wild = strstr(s, p)) != NULL) { 9091d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_addlstring(&b, s, wild - s); /* push prefix */ 9101d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_addstring(&b, r); /* push replacement in place of pattern */ 9111d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III s = wild + l; /* continue after `p' */ 9121d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 9131d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_addstring(&b, s); /* push last suffix */ 9141d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_pushresult(&b); 9151d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return lua_tostring(L, -1); 9161d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 9171d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 9181d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 9191d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIIstatic void *l_alloc (void *ud, void *ptr, size_t osize, size_t nsize) { 9201d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III (void)ud; (void)osize; /* not used */ 9211d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (nsize == 0) { 9221d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III free(ptr); 9231d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return NULL; 9241d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III } 9251d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else 9261d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return realloc(ptr, nsize); 9271d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 9281d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 9291d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 9301d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIIstatic int panic (lua_State *L) { 9311d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luai_writestringerror("PANIC: unprotected error in call to Lua API (%s)\n", 9321d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_tostring(L, -1)); 9331d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return 0; /* return to Lua to abort */ 9341d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 9351d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 9361d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 9371d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API lua_State *luaL_newstate (void) { 9381d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_State *L = lua_newstate(l_alloc, NULL); 9391d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (L) lua_atpanic(L, &panic); 9401d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III return L; 9411d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 9421d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 9431d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 9441d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins IIILUALIB_API void luaL_checkversion_ (lua_State *L, lua_Number ver) { 9451d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III const lua_Number *v = lua_version(L); 9461d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (v != lua_version(NULL)) 9471d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_error(L, "multiple Lua VMs detected"); 9481d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III else if (*v != ver) 9491d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_error(L, "version mismatch: app. needs %f, Lua core provides %f", 9501d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III ver, *v); 9511d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III /* check conversions number -> integer types */ 9521d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pushnumber(L, -(lua_Number)0x1234); 9531d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III if (lua_tointeger(L, -1) != -0x1234 || 9541d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_tounsigned(L, -1) != (lua_Unsigned)-0x1234) 9551d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III luaL_error(L, "bad conversion number->int;" 9561d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III " must recompile Lua with proper settings"); 9571d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III lua_pop(L, 1); 9581d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III} 9591d9a26b35628ec99e6b03380bdedec2a0135d5f9Leon Scroggins III 960