#include <errno.h>
#include <string.h>
#include "lua.h"
#include "lauxlib.h"
#include "compat-5.2.h"
#if !defined(LUA_VERSION_NUM) || LUA_VERSION_NUM == 501
int lua_absindex (lua_State *L, int i) {
if (i < 0 && i > LUA_REGISTRYINDEX)
i += lua_gettop(L) + 1;
return i;
}
void lua_copy (lua_State *L, int from, int to) {
int abs_to = lua_absindex(L, to);
luaL_checkstack(L, 1, "not enough stack slots");
lua_pushvalue(L, from);
lua_replace(L, abs_to);
}
void lua_rawgetp (lua_State *L, int i, const void *p) {
int abs_i = lua_absindex(L, i);
lua_pushlightuserdata(L, (void*)p);
lua_rawget(L, abs_i);
}
void lua_rawsetp (lua_State *L, int i, const void *p) {
int abs_i = lua_absindex(L, i);
luaL_checkstack(L, 1, "not enough stack slots");
lua_pushlightuserdata(L, (void*)p);
lua_insert(L, -2);
lua_rawset(L, abs_i);
}
void *luaL_testudata (lua_State *L, int i, const char *tname) {
void *p = lua_touserdata(L, i);
luaL_checkstack(L, 2, "not enough stack slots");
if (p == NULL || !lua_getmetatable(L, i))
return NULL;
else {
int res = 0;
luaL_getmetatable(L, tname);
res = lua_rawequal(L, -1, -2);
lua_pop(L, 2);
if (!res)
p = NULL;
}
return p;
}
lua_Number lua_tonumberx (lua_State *L, int i, int *isnum) {
lua_Number n = lua_tonumber(L, i);
if (isnum != NULL) {
*isnum = (n != 0 || lua_isnumber(L, i));
}
return n;
}
#define PACKAGE_KEY "_COMPAT52_PACKAGE"
static void push_package_table (lua_State *L) {
lua_pushliteral(L, PACKAGE_KEY);
lua_rawget(L, LUA_REGISTRYINDEX);
if (!lua_istable(L, -1)) {
lua_pop(L, 1);
/* try to get package table from globals */
lua_pushliteral(L, "package");
lua_rawget(L, LUA_GLOBALSINDEX);
if (lua_istable(L, -1)) {
lua_pushliteral(L, PACKAGE_KEY);
lua_pushvalue(L, -2);
lua_rawset(L, LUA_REGISTRYINDEX);
}
}
}
void lua_getuservalue (lua_State *L, int i) {
luaL_checktype(L, i, LUA_TUSERDATA);
luaL_checkstack(L, 2, "not enough stack slots");
lua_getfenv(L, i);
lua_pushvalue(L, LUA_GLOBALSINDEX);
if (lua_rawequal(L, -1, -2)) {
lua_pop(L, 1);
lua_pushnil(L);
lua_replace(L, -2);
} else {
lua_pop(L, 1);
push_package_table(L);
if (lua_rawequal(L, -1, -2)) {
lua_pop(L, 1);
lua_pushnil(L);
lua_replace(L, -2);
} else
lua_pop(L, 1);
}
}
void lua_setuservalue (lua_State *L, int i) {
luaL_checktype(L, i, LUA_TUSERDATA);
if (lua_isnil(L, -1)) {
luaL_checkstack(L, 1, "not enough stack slots");
lua_pushvalue(L, LUA_GLOBALSINDEX);
lua_replace(L, -2);
}
lua_setfenv(L, i);
}
/*
** Adapted from Lua 5.2.0
*/
void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) {
luaL_checkstack(L, nup+1, "too many upvalues");
for (; l->name != NULL; l++) { /* fill the table with given functions */
int i;
lua_pushstring(L, l->name);
for (i = 0; i < nup; i++) /* copy upvalues to the top */
lua_pushvalue(L, -(nup + 1));
lua_pushcclosure(L, l->func, nup); /* closure with those upvalues */
lua_settable(L, -(nup + 3)); /* table must be below the upvalues, the name and the closure */
}
lua_pop(L, nup); /* remove upvalues */
}
void luaL_setmetatable (lua_State *L, const char *tname) {
luaL_checkstack(L, 1, "not enough stack slots");
luaL_getmetatable(L, tname);
lua_setmetatable(L, -2);
}
int luaL_getsubtable (lua_State *L, int i, const char *name) {
int abs_i = lua_absindex(L, i);
luaL_checkstack(L, 3, "not enough stack slots");
lua_pushstring(L, name);
lua_gettable(L, abs_i);
if (lua_istable(L, -1))
return 1;
lua_pop(L, 1);
lua_newtable(L);
lua_pushstring(L, name);
lua_pushvalue(L, -2);
lua_settable(L, abs_i);
return 0;
}
#if !defined(COMPAT52_IS_LUAJIT)
static int countlevels (lua_State *L) {
lua_Debug ar;
int li = 1, le = 1;
/* find an upper bound */
while (lua_getstack(L, le, &ar)) { li = le; le *= 2; }
/* do a binary search */
while (li < le) {
int m = (li + le)/2;
if (lua_getstack(L, m, &ar)) li = m + 1;
else le = m;
}
return le - 1;
}
static int findfield (lua_State *L, int objidx, int level) {
if (level == 0 || !lua_istable(L, -1))
return 0; /* not found */
lua_pushnil(L); /* start 'next' loop */
while (lua_next(L, -2)) { /* for each pair in table */
if (lua_type(L, -2) == LUA_TSTRING) { /* ignore non-string keys */
if (lua_rawequal(L, objidx, -1)) { /* found object? */
lua_pop(L, 1); /* remove value (but keep name) */
return 1;
}
else if (findfield(L, objidx, level - 1)) { /* try recursively */
lua_remove(L, -2); /* remove table (but keep name) */
lua_pushliteral(L, ".");
lua_insert(L, -2); /* place '.' between the two names */
lua_concat(L, 3);
return 1;
}
}
lua_pop(L, 1); /* remove value */
}
return 0; /* not found */
}
static int pushglobalfuncname (lua_State *L, lua_Debug *ar) {
int top = lua_gettop(L);
lua_getinfo(L, "f", ar); /* push function */
lua_pushvalue(L, LUA_GLOBALSINDEX);
if (findfield(L, top + 1, 2)) {
lua_copy(L, -1, top + 1); /* move name to proper place */
lua_pop(L, 2); /* remove pushed values */
return 1;
}
else {
lua_settop(L, top); /* remove function and global table */
return 0;
}
}
static void pushfuncname (lua_State *L, lua_Debug *ar) {
if (*ar->namewhat != '\0') /* is there a name? */
lua_pushfstring(L, "function " LUA_QS, ar->name);
else if (*ar->what == 'm') /* main? */
lua_pushliteral(L, "main chunk");
else if (*ar->what == 'C') {
if (pushglobalfuncname(L, ar)) {
lua_pushfstring(L, "function " LUA_QS, lua_tostring(L, -1));
lua_remove(L, -2); /* remove name */
}
else
lua_pushliteral(L, "?");
}
else
lua_pushfstring(L, "function <%s:%d>", ar->short_src, ar->linedefined);
}
#define LEVELS1 12 /* size of the first part of the stack */
#define LEVELS2 10 /* size of the second part of the stack */
void luaL_traceback (lua_State *L, lua_State *L1,
const char *msg, int level) {
lua_Debug ar;
int top = lua_gettop(L);
int numlevels = countlevels(L1);
int mark = (numlevels > LEVELS1 + LEVELS2) ? LEVELS1 : 0;
if (msg) lua_pushfstring(L, "%s\n", msg);
lua_pushliteral(L, "stack traceback:");
while (lua_getstack(L1, level++, &ar)) {
if (level == mark) { /* too many levels? */
lua_pushliteral(L, "\n\t..."); /* add a '...' */
level = numlevels - LEVELS2; /* and skip to last ones */
}
else {
lua_getinfo(L1, "Slnt", &ar);
lua_pushfstring(L, "\n\t%s:", ar.short_src);
if (ar.currentline > 0)
lua_pushfstring(L, "%d:", ar.currentline);
lua_pushliteral(L, " in ");
pushfuncname(L, &ar);
lua_concat(L, lua_gettop(L) - top);
}
}
lua_concat(L, lua_gettop(L) - top);
}
#endif
void luaL_checkversion (lua_State *L) {
(void)L;
}
#if !defined(COMPAT52_IS_LUAJIT)
int luaL_fileresult (lua_State *L, int stat, const char *fname) {
int en = errno; /* calls to Lua API may change this value */
if (stat) {
lua_pushboolean(L, 1);
return 1;
}
else {
lua_pushnil(L);
if (fname)
lua_pushfstring(L, "%s: %s", fname, strerror(en));
else
lua_pushstring(L, strerror(en));
lua_pushnumber(L, (lua_Number)en);
return 3;
}
}
#endif
#endif /* Lua 5.0 or Lua 5.1 */
#if defined(LUA_VERSION_NUM) && LUA_VERSION_NUM == 501
#include <limits.h>
typedef LUAI_INT32 LUA_INT32;
/********************************************************************/
/* extract of 5.2's luaconf.h */
/* detects proper defines for faster unsigned<->number conversion */
/* see copyright notice at the end of this file */
/********************************************************************/
#if !defined(LUA_ANSI) && defined(_WIN32) && !defined(_WIN32_WCE)
#define LUA_WIN /* enable goodies for regular Windows platforms */
#endif
#if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) /* { */
/* Microsoft compiler on a Pentium (32 bit) ? */
#if defined(LUA_WIN) && defined(_MSC_VER) && defined(_M_IX86) /* { */
#define LUA_MSASMTRICK
#define LUA_IEEEENDIAN 0
#define LUA_NANTRICK
/* pentium 32 bits? */
#elif defined(__i386__) || defined(__i386) || defined(__X86__) /* }{ */
#define LUA_IEEE754TRICK
#define LUA_IEEELL
#define LUA_IEEEENDIAN 0
#define LUA_NANTRICK
/* pentium 64 bits? */
#elif defined(__x86_64) /* }{ */
#define LUA_IEEE754TRICK
#define LUA_IEEEENDIAN 0
#elif defined(__POWERPC__) || defined(__ppc__) /* }{ */
#define LUA_IEEE754TRICK
#define LUA_IEEEENDIAN 1
#else /* }{ */
/* assume IEEE754 and a 32-bit integer type */
#define LUA_IEEE754TRICK
#endif /* } */
#endif /* } */
/********************************************************************/
/* extract of 5.2's llimits.h */
/* gives us lua_number2unsigned and lua_unsigned2number */
/* see copyright notice at the end of this file */
/********************************************************************/
#if defined(MS_ASMTRICK) || defined(LUA_MSASMTRICK) /* { */
/* trick with Microsoft assembler for X86 */
#define lua_number2unsigned(i,n) \
{__int64 l; __asm {__asm fld n __asm fistp l} i = (unsigned int)l;}
#elif defined(LUA_IEEE754TRICK) /* }{ */
/* the next trick should work on any machine using IEEE754 with
a 32-bit int type */
union compat52_luai_Cast { double l_d; LUA_INT32 l_p[2]; };
#if !defined(LUA_IEEEENDIAN) /* { */
#define LUAI_EXTRAIEEE \
static const union compat52_luai_Cast ieeeendian = {-(33.0 + 6755399441055744.0)};
#define LUA_IEEEENDIANLOC (ieeeendian.l_p[1] == 33)
#else
#define LUA_IEEEENDIANLOC LUA_IEEEENDIAN
#define LUAI_EXTRAIEEE /* empty */
#endif /* } */
#define lua_number2int32(i,n,t) \
{ LUAI_EXTRAIEEE \
volatile union compat52_luai_Cast u; u.l_d = (n) + 6755399441055744.0; \
(i) = (t)u.l_p[LUA_IEEEENDIANLOC]; }
#define lua_number2unsigned(i,n) lua_number2int32(i, n, lua_Unsigned)
#endif /* } */
/* the following definitions always work, but may be slow */
#if !defined(lua_number2unsigned) /* { */
/* the following definition assures proper modulo behavior */
#if defined(LUA_NUMBER_DOUBLE) || defined(LUA_NUMBER_FLOAT)
#include <math.h>
#define SUPUNSIGNED ((lua_Number)(~(lua_Unsigned)0) + 1)
#define lua_number2unsigned(i,n) \
((i)=(lua_Unsigned)((n) - floor((n)/SUPUNSIGNED)*SUPUNSIGNED))
#else
#define lua_number2unsigned(i,n) ((i)=(lua_Unsigned)(n))
#endif
#endif /* } */
#if !defined(lua_unsigned2number)
/* on several machines, coercion from unsigned to double is slow,
so it may be worth to avoid */
#define lua_unsigned2number(u) \
(((u) <= (lua_Unsigned)INT_MAX) ? (lua_Number)(int)(u) : (lua_Number)(u))
#endif
/********************************************************************/
static void compat52_call_lua (lua_State *L, char const code[], size_t len,
int nargs, int nret) {
lua_rawgetp(L, LUA_REGISTRYINDEX, (void*)code);
if (lua_type(L, -1) != LUA_TFUNCTION) {
lua_pop(L, 1);
if (luaL_loadbuffer(L, code, len, "=none"))
lua_error(L);
lua_pushvalue(L, -1);
lua_rawsetp(L, LUA_REGISTRYINDEX, (void*)code);
}
lua_insert(L, -nargs-1);
lua_call(L, nargs, nret);
}
static const char compat52_arith_code[] = {
'l', 'o', 'c', 'a', 'l', ' ', 'o', 'p', ',', 'a', ',', 'b',
'=', '.', '.', '.', '\n',
'i', 'f', ' ', 'o', 'p', '=', '=', '0', ' ',
't', 'h', 'e', 'n', '\n',
'r', 'e', 't', 'u', 'r', 'n', ' ', 'a', '+', 'b', '\n',
'e', 'l', 's', 'e', 'i', 'f', ' ', 'o', 'p', '=', '=', '1', ' ',
't', 'h', 'e', 'n', '\n',
'r', 'e', 't', 'u', 'r', 'n', ' ', 'a', '-', 'b', '\n',
'e', 'l', 's', 'e', 'i', 'f', ' ', 'o', 'p', '=', '=', '2', ' ',
't', 'h', 'e', 'n', '\n',
'r', 'e', 't', 'u', 'r', 'n', ' ', 'a', '*', 'b', '\n',
'e', 'l', 's', 'e', 'i', 'f', ' ', 'o', 'p', '=', '=', '3', ' ',
't', 'h', 'e', 'n', '\n',
'r', 'e', 't', 'u', 'r', 'n', ' ', 'a', '/', 'b', '\n',
'e', 'l', 's', 'e', 'i', 'f', ' ', 'o', 'p', '=', '=', '4', ' ',
't', 'h', 'e', 'n', '\n',
'r', 'e', 't', 'u', 'r', 'n', ' ', 'a', '%', 'b', '\n',
'e', 'l', 's', 'e', 'i', 'f', ' ', 'o', 'p', '=', '=', '5', ' ',
't', 'h', 'e', 'n', '\n',
'r', 'e', 't', 'u', 'r', 'n', ' ', 'a', '^', 'b', '\n',
'e', 'l', 's', 'e', 'i', 'f', ' ', 'o', 'p', '=', '=', '6', ' ',
't', 'h', 'e', 'n', '\n',
'r', 'e', 't', 'u', 'r', 'n', ' ', '-', 'a', '\n',
'e', 'n', 'd', '\n', '\0'
};
void lua_arith (lua_State *L, int op) {
if (op < LUA_OPADD && op > LUA_OPUNM)
luaL_error(L, "invalid 'op' argument for lua_arith");
luaL_checkstack(L, 5, "not enough stack slots");
if (op == LUA_OPUNM)
lua_pushvalue(L, -1);
lua_pushnumber(L, op);
lua_insert(L, -3);
compat52_call_lua(L, compat52_arith_code,
sizeof(compat52_arith_code)-1, 3, 1);
}
static const char compat52_compare_code[] = {
'l', 'o', 'c', 'a', 'l', ' ', 'a', ',', 'b', '=', '.', '.', '.', '\n',
'r', 'e', 't', 'u', 'r', 'n', ' ', 'a', '<', '=', 'b', '\n', '\0'
};
int lua_compare (lua_State *L, int idx1, int idx2, int op) {
int result = 0;
switch (op) {
case LUA_OPEQ:
return lua_equal(L, idx1, idx2);
case LUA_OPLT:
return lua_lessthan(L, idx1, idx2);
case LUA_OPLE:
luaL_checkstack(L, 5, "not enough stack slots");
idx1 = lua_absindex(L, idx1);
idx2 = lua_absindex(L, idx2);
lua_pushvalue(L, idx1);
lua_pushvalue(L, idx2);
compat52_call_lua(L, (void*)compat52_compare_code,
sizeof(compat52_compare_code)-1, 2, 1);
result = lua_toboolean(L, -1);
lua_pop(L, 1);
return result;
default:
luaL_error(L, "invalid 'op' argument for lua_compare");
}
return 0;
}
void lua_pushunsigned (lua_State *L, lua_Unsigned n) {
lua_pushnumber(L, lua_unsigned2number(n));
}
lua_Unsigned luaL_checkunsigned (lua_State *L, int i) {
lua_Unsigned result;
lua_Number n = lua_tonumber(L, i);
if (n == 0 && !lua_isnumber(L, i))
luaL_checktype(L, i, LUA_TNUMBER);
lua_number2unsigned(result, n);
return result;
}
lua_Unsigned lua_tounsignedx (lua_State *L, int i, int *isnum) {
lua_Unsigned result;
lua_Number n = lua_tonumberx(L, i, isnum);
lua_number2unsigned(result, n);
return result;
}
lua_Unsigned luaL_optunsigned (lua_State *L, int i, lua_Unsigned def) {
return luaL_opt(L, luaL_checkunsigned, i, def);
}
lua_Integer lua_tointegerx (lua_State *L, int i, int *isnum) {
lua_Integer n = lua_tointeger(L, i);
if (isnum != NULL) {
*isnum = (n != 0 || lua_isnumber(L, i));
}
return n;
}
void lua_len (lua_State *L, int i) {
switch (lua_type(L, i)) {
case LUA_TSTRING: /* fall through */
case LUA_TTABLE:
if (!luaL_callmeta(L, i, "__len"))
lua_pushnumber(L, (int)lua_objlen(L, i));
break;
case LUA_TUSERDATA:
if (luaL_callmeta(L, i, "__len"))
break;
/* maybe fall through */
default:
luaL_error(L, "attempt to get length of a %s value",
lua_typename(L, lua_type(L, i)));
}
}
int luaL_len (lua_State *L, int i) {
int res = 0, isnum = 0;
luaL_checkstack(L, 1, "not enough stack slots");
lua_len(L, i);
res = (int)lua_tointegerx(L, -1, &isnum);
lua_pop(L, 1);
if (!isnum)
luaL_error(L, "object length is not a number");
return res;
}
const char *luaL_tolstring (lua_State *L, int idx, size_t *len) {
if (!luaL_callmeta(L, idx, "__tostring")) {
int t = lua_type(L, idx);
switch (t) {
case LUA_TNIL:
lua_pushliteral(L, "nil");
break;
case LUA_TSTRING:
case LUA_TNUMBER:
lua_pushvalue(L, idx);
break;
case LUA_TBOOLEAN:
if (lua_toboolean(L, idx))
lua_pushliteral(L, "true");
else
lua_pushliteral(L, "false");
break;
default:
lua_pushfstring(L, "%s: %p", lua_typename(L, t),
lua_topointer(L, idx));
break;
}
}
return lua_tolstring(L, -1, len);
}
void luaL_requiref (lua_State *L, char const* modname,
lua_CFunction openf, int glb) {
luaL_checkstack(L, 3, "not enough stack slots");
lua_pushcfunction(L, openf);
lua_pushstring(L, modname);
lua_call(L, 1, 1);
lua_getglobal(L, "package");
lua_getfield(L, -1, "loaded");
lua_replace(L, -2);
lua_pushvalue(L, -2);
lua_setfield(L, -2, modname);
lua_pop(L, 1);
if (glb) {
lua_pushvalue(L, -1);
lua_setglobal(L, modname);
}
}
void luaL_buffinit (lua_State *L, luaL_Buffer_52 *B) {
/* make it crash if used via pointer to a 5.1-style luaL_Buffer */
B->b.p = NULL;
B->b.L = NULL;
B->b.lvl = 0;
/* reuse the buffer from the 5.1-style luaL_Buffer though! */
B->ptr = B->b.buffer;
B->capacity = LUAL_BUFFERSIZE;
B->nelems = 0;
B->L2 = L;
}
char *luaL_prepbuffsize (luaL_Buffer_52 *B, size_t s) {
if (B->capacity - B->nelems < s) { /* needs to grow */
char* newptr = NULL;
size_t newcap = B->capacity * 2;
if (newcap - B->nelems < s)
newcap = B->nelems + s;
if (newcap < B->capacity) /* overflow */
luaL_error(B->L2, "buffer too large");
newptr = lua_newuserdata(B->L2, newcap);
memcpy(newptr, B->ptr, B->nelems);
if (B->ptr != B->b.buffer)
lua_replace(B->L2, -2); /* remove old buffer */
B->ptr = newptr;
B->capacity = newcap;
}
return B->ptr+B->nelems;
}
void luaL_addlstring (luaL_Buffer_52 *B, const char *s, size_t l) {
memcpy(luaL_prepbuffsize(B, l), s, l);
luaL_addsize(B, l);
}
void luaL_addvalue (luaL_Buffer_52 *B) {
size_t len = 0;
const char *s = lua_tolstring(B->L2, -1, &len);
if (!s)
luaL_error(B->L2, "cannot convert value to string");
if (B->ptr != B->b.buffer)
lua_insert(B->L2, -2); /* userdata buffer must be at stack top */
luaL_addlstring(B, s, len);
lua_remove(B->L2, B->ptr != B->b.buffer ? -2 : -1);
}
void luaL_pushresult (luaL_Buffer_52 *B) {
lua_pushlstring(B->L2, B->ptr, B->nelems);
if (B->ptr != B->b.buffer)
lua_replace(B->L2, -2); /* remove userdata buffer */
}
#endif /* LUA_VERSION_NUM == 501 */
/*********************************************************************
* This file contains parts of Lua 5.2's source code:
*
* Copyright (C) 1994-2013 Lua.org, PUC-Rio.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*********************************************************************/