mirror of
https://github.com/UberGames/RPG-X2.git
synced 2024-11-15 17:31:38 +00:00
516 lines
14 KiB
C
516 lines
14 KiB
C
/*
|
|
** $Id: lbaselib.c,v 1.251 2010/10/28 15:36:30 roberto Exp $
|
|
** Basic library
|
|
** See Copyright Notice in lua.h
|
|
*/
|
|
|
|
|
|
|
|
#include <ctype.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#define lbaselib_c
|
|
#define LUA_LIB
|
|
|
|
#include "lua.h"
|
|
|
|
#include "lauxlib.h"
|
|
#include "lualib.h"
|
|
|
|
|
|
static int luaB_print (lua_State *L) {
|
|
int n = lua_gettop(L); /* number of arguments */
|
|
int i;
|
|
lua_getglobal(L, "tostring");
|
|
for (i=1; i<=n; i++) {
|
|
const char *s;
|
|
size_t l;
|
|
lua_pushvalue(L, -1); /* function to be called */
|
|
lua_pushvalue(L, i); /* value to print */
|
|
lua_call(L, 1, 1);
|
|
s = lua_tolstring(L, -1, &l); /* get result */
|
|
if (s == NULL)
|
|
return luaL_error(L, LUA_QL("tostring") " must return a string to "
|
|
LUA_QL("print"));
|
|
if (i>1) luai_writestring("\t", 1);
|
|
luai_writestring(s, l);
|
|
lua_pop(L, 1); /* pop result */
|
|
}
|
|
luai_writestring("\n", 1);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int luaB_tonumber (lua_State *L) {
|
|
int base = luaL_optint(L, 2, 10);
|
|
if (base == 10) { /* standard conversion */
|
|
luaL_checkany(L, 1);
|
|
if (lua_isnumber(L, 1)) {
|
|
lua_pushnumber(L, lua_tonumber(L, 1));
|
|
return 1;
|
|
}
|
|
}
|
|
else {
|
|
const char *s1 = luaL_checkstring(L, 1);
|
|
char *s2;
|
|
unsigned long n;
|
|
int neg = 0;
|
|
luaL_argcheck(L, 2 <= base && base <= 36, 2, "base out of range");
|
|
while (isspace((unsigned char)(*s1))) s1++; /* skip initial spaces */
|
|
if (*s1 == '-') { s1++; neg = 1; }
|
|
n = strtoul(s1, &s2, base);
|
|
if (s1 != s2) { /* at least one valid digit? */
|
|
while (isspace((unsigned char)(*s2))) s2++; /* skip trailing spaces */
|
|
if (*s2 == '\0') { /* no invalid trailing characters? */
|
|
lua_pushnumber(L, (neg) ? -(lua_Number)n : (lua_Number)n);
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
lua_pushnil(L); /* else not a number */
|
|
return 1;
|
|
}
|
|
|
|
|
|
static int luaB_error (lua_State *L) {
|
|
int level = luaL_optint(L, 2, 1);
|
|
lua_settop(L, 1);
|
|
if (lua_isstring(L, 1) && level > 0) { /* add extra information? */
|
|
luaL_where(L, level);
|
|
lua_pushvalue(L, 1);
|
|
lua_concat(L, 2);
|
|
}
|
|
return lua_error(L);
|
|
}
|
|
|
|
|
|
static int luaB_getmetatable (lua_State *L) {
|
|
luaL_checkany(L, 1);
|
|
if (!lua_getmetatable(L, 1)) {
|
|
lua_pushnil(L);
|
|
return 1; /* no metatable */
|
|
}
|
|
luaL_getmetafield(L, 1, "__metatable");
|
|
return 1; /* returns either __metatable field (if present) or metatable */
|
|
}
|
|
|
|
|
|
static int luaB_setmetatable (lua_State *L) {
|
|
int t = lua_type(L, 2);
|
|
luaL_checktype(L, 1, LUA_TTABLE);
|
|
luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2,
|
|
"nil or table expected");
|
|
if (luaL_getmetafield(L, 1, "__metatable"))
|
|
return luaL_error(L, "cannot change a protected metatable");
|
|
lua_settop(L, 2);
|
|
lua_setmetatable(L, 1);
|
|
return 1;
|
|
}
|
|
|
|
|
|
static int luaB_getfenv (lua_State *L) {
|
|
return luaL_error(L, "getfenv/setfenv deprecated");
|
|
}
|
|
|
|
#define luaB_setfenv luaB_getfenv
|
|
|
|
|
|
static int luaB_rawequal (lua_State *L) {
|
|
luaL_checkany(L, 1);
|
|
luaL_checkany(L, 2);
|
|
lua_pushboolean(L, lua_rawequal(L, 1, 2));
|
|
return 1;
|
|
}
|
|
|
|
|
|
static int luaB_rawget (lua_State *L) {
|
|
luaL_checktype(L, 1, LUA_TTABLE);
|
|
luaL_checkany(L, 2);
|
|
lua_settop(L, 2);
|
|
lua_rawget(L, 1);
|
|
return 1;
|
|
}
|
|
|
|
static int luaB_rawset (lua_State *L) {
|
|
luaL_checktype(L, 1, LUA_TTABLE);
|
|
luaL_checkany(L, 2);
|
|
luaL_checkany(L, 3);
|
|
lua_settop(L, 3);
|
|
lua_rawset(L, 1);
|
|
return 1;
|
|
}
|
|
|
|
|
|
static int luaB_collectgarbage (lua_State *L) {
|
|
static const char *const opts[] = {"stop", "restart", "collect",
|
|
"count", "step", "setpause", "setstepmul",
|
|
"setmajorinc", "isrunning", "gen", "inc", NULL};
|
|
static const int optsnum[] = {LUA_GCSTOP, LUA_GCRESTART, LUA_GCCOLLECT,
|
|
LUA_GCCOUNT, LUA_GCSTEP, LUA_GCSETPAUSE, LUA_GCSETSTEPMUL,
|
|
LUA_GCSETMAJORINC, LUA_GCISRUNNING, LUA_GCGEN, LUA_GCINC};
|
|
int o = optsnum[luaL_checkoption(L, 1, "collect", opts)];
|
|
int ex = luaL_optint(L, 2, 0);
|
|
int res = lua_gc(L, o, ex);
|
|
switch (o) {
|
|
case LUA_GCCOUNT: {
|
|
int b = lua_gc(L, LUA_GCCOUNTB, 0);
|
|
lua_pushnumber(L, res + ((lua_Number)b/1024));
|
|
lua_pushinteger(L, b);
|
|
return 2;
|
|
}
|
|
case LUA_GCSTEP: case LUA_GCISRUNNING: {
|
|
lua_pushboolean(L, res);
|
|
return 1;
|
|
}
|
|
default: {
|
|
lua_pushinteger(L, res);
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static int luaB_type (lua_State *L) {
|
|
luaL_checkany(L, 1);
|
|
lua_pushstring(L, luaL_typename(L, 1));
|
|
return 1;
|
|
}
|
|
|
|
|
|
static int pairsmeta (lua_State *L, const char *method, int iszero,
|
|
lua_CFunction iter) {
|
|
if (!luaL_getmetafield(L, 1, method)) { /* no metamethod? */
|
|
luaL_checktype(L, 1, LUA_TTABLE); /* argument must be a table */
|
|
lua_pushcfunction(L, iter); /* will return generator, */
|
|
lua_pushvalue(L, 1); /* state, */
|
|
if (iszero) lua_pushinteger(L, 0); /* and initial value */
|
|
else lua_pushnil(L);
|
|
}
|
|
else {
|
|
lua_pushvalue(L, 1); /* argument 'self' to metamethod */
|
|
lua_call(L, 1, 3); /* get 3 values from metamethod */
|
|
}
|
|
return 3;
|
|
}
|
|
|
|
|
|
static int luaB_next (lua_State *L) {
|
|
luaL_checktype(L, 1, LUA_TTABLE);
|
|
lua_settop(L, 2); /* create a 2nd argument if there isn't one */
|
|
if (lua_next(L, 1))
|
|
return 2;
|
|
else {
|
|
lua_pushnil(L);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
|
|
static int luaB_pairs (lua_State *L) {
|
|
return pairsmeta(L, "__pairs", 0, luaB_next);
|
|
}
|
|
|
|
|
|
static int ipairsaux (lua_State *L) {
|
|
int i = luaL_checkint(L, 2);
|
|
luaL_checktype(L, 1, LUA_TTABLE);
|
|
i++; /* next value */
|
|
lua_pushinteger(L, i);
|
|
lua_rawgeti(L, 1, i);
|
|
return (lua_isnil(L, -1)) ? 1 : 2;
|
|
}
|
|
|
|
|
|
static int luaB_ipairs (lua_State *L) {
|
|
return pairsmeta(L, "__ipairs", 1, ipairsaux);
|
|
}
|
|
|
|
|
|
static int load_aux (lua_State *L, int status) {
|
|
if (status == LUA_OK)
|
|
return 1;
|
|
else {
|
|
lua_pushnil(L);
|
|
lua_insert(L, -2); /* put before error message */
|
|
return 2; /* return nil plus error message */
|
|
}
|
|
}
|
|
|
|
|
|
static int luaB_loadfile (lua_State *L) {
|
|
const char *fname = luaL_optstring(L, 1, NULL);
|
|
return load_aux(L, luaL_loadfile(L, fname));
|
|
}
|
|
|
|
|
|
/*
|
|
** {======================================================
|
|
** Generic Read function
|
|
** =======================================================
|
|
*/
|
|
|
|
static const char *checkrights (lua_State *L, const char *mode, const char *s) {
|
|
if (strchr(mode, 'b') == NULL && *s == LUA_SIGNATURE[0])
|
|
return lua_pushstring(L, "attempt to load a binary chunk");
|
|
if (strchr(mode, 't') == NULL && *s != LUA_SIGNATURE[0])
|
|
return lua_pushstring(L, "attempt to load a text chunk");
|
|
return NULL; /* chunk in allowed format */
|
|
}
|
|
|
|
|
|
/*
|
|
** reserves a slot, above all arguments, to hold a copy of the returned
|
|
** string to avoid it being collected while parsed
|
|
*/
|
|
#define RESERVEDSLOT 4
|
|
|
|
|
|
/*
|
|
** Reader for generic `load' function: `lua_load' uses the
|
|
** stack for internal stuff, so the reader cannot change the
|
|
** stack top. Instead, it keeps its resulting string in a
|
|
** reserved slot inside the stack.
|
|
*/
|
|
typedef struct { /* reader state */
|
|
int f; /* position of reader function on stack */
|
|
const char *mode; /* allowed modes (binary/text) */
|
|
} Readstat;
|
|
|
|
static const char *generic_reader (lua_State *L, void *ud, size_t *size) {
|
|
const char *s;
|
|
Readstat *stat = (Readstat *)ud;
|
|
luaL_checkstack(L, 2, "too many nested functions");
|
|
lua_pushvalue(L, stat->f); /* get function */
|
|
lua_call(L, 0, 1); /* call it */
|
|
if (lua_isnil(L, -1)) {
|
|
*size = 0;
|
|
return NULL;
|
|
}
|
|
else if ((s = lua_tostring(L, -1)) != NULL) {
|
|
if (stat->mode != NULL) { /* first time? */
|
|
s = checkrights(L, stat->mode, s); /* check mode */
|
|
stat->mode = NULL; /* to avoid further checks */
|
|
if (s) luaL_error(L, s);
|
|
}
|
|
lua_replace(L, RESERVEDSLOT); /* save string in reserved slot */
|
|
return lua_tolstring(L, RESERVEDSLOT, size);
|
|
}
|
|
else {
|
|
luaL_error(L, "reader function must return a string");
|
|
return NULL; /* to avoid warnings */
|
|
}
|
|
}
|
|
|
|
|
|
static int luaB_load_aux (lua_State *L, int farg) {
|
|
int status;
|
|
Readstat stat;
|
|
size_t l;
|
|
const char *s = lua_tolstring(L, farg, &l);
|
|
stat.mode = luaL_optstring(L, farg + 2, "bt");
|
|
if (s != NULL) { /* loading a string? */
|
|
const char *chunkname = luaL_optstring(L, farg + 1, s);
|
|
status = (checkrights(L, stat.mode, s) != NULL)
|
|
|| luaL_loadbuffer(L, s, l, chunkname);
|
|
}
|
|
else { /* loading from a reader function */
|
|
const char *chunkname = luaL_optstring(L, farg + 1, "=(load)");
|
|
luaL_checktype(L, farg, LUA_TFUNCTION);
|
|
stat.f = farg;
|
|
lua_settop(L, RESERVEDSLOT); /* create reserved slot */
|
|
status = lua_load(L, generic_reader, &stat, chunkname);
|
|
}
|
|
return load_aux(L, status);
|
|
}
|
|
|
|
|
|
static int luaB_load (lua_State *L) {
|
|
return luaB_load_aux(L, 1);
|
|
}
|
|
|
|
|
|
static int luaB_loadin (lua_State *L) {
|
|
int n;
|
|
luaL_checkany(L, 1);
|
|
n = luaB_load_aux(L, 2);
|
|
if (n == 1) { /* success? */
|
|
lua_pushvalue(L, 1); /* environment for loaded function */
|
|
if (lua_setupvalue(L, -2, 1) == NULL)
|
|
luaL_error(L, "loaded chunk does not have an upvalue");
|
|
}
|
|
return n;
|
|
}
|
|
|
|
|
|
static int luaB_loadstring (lua_State *L) {
|
|
lua_settop(L, 2);
|
|
lua_pushliteral(L, "tb");
|
|
return luaB_load(L); /* dostring(s, n) == load(s, n, "tb") */
|
|
|
|
}
|
|
/* }====================================================== */
|
|
|
|
|
|
static int dofilecont (lua_State *L) {
|
|
return lua_gettop(L) - 1;
|
|
}
|
|
|
|
|
|
static int luaB_dofile (lua_State *L) {
|
|
const char *fname = luaL_optstring(L, 1, NULL);
|
|
lua_settop(L, 1);
|
|
if (luaL_loadfile(L, fname) != LUA_OK) lua_error(L);
|
|
lua_callk(L, 0, LUA_MULTRET, 0, dofilecont);
|
|
return dofilecont(L);
|
|
}
|
|
|
|
|
|
static int luaB_assert (lua_State *L) {
|
|
if (!lua_toboolean(L, 1))
|
|
return luaL_error(L, "%s", luaL_optstring(L, 2, "assertion failed!"));
|
|
return lua_gettop(L);
|
|
}
|
|
|
|
|
|
static int luaB_select (lua_State *L) {
|
|
int n = lua_gettop(L);
|
|
if (lua_type(L, 1) == LUA_TSTRING && *lua_tostring(L, 1) == '#') {
|
|
lua_pushinteger(L, n-1);
|
|
return 1;
|
|
}
|
|
else {
|
|
int i = luaL_checkint(L, 1);
|
|
if (i < 0) i = n + i;
|
|
else if (i > n) i = n;
|
|
luaL_argcheck(L, 1 <= i, 1, "index out of range");
|
|
return n - i;
|
|
}
|
|
}
|
|
|
|
|
|
static int pcallcont (lua_State *L) {
|
|
int errfunc; /* call has an error function in bottom of the stack */
|
|
int status = lua_getctx(L, &errfunc);
|
|
lua_assert(status != LUA_OK);
|
|
lua_pushboolean(L, (status == LUA_YIELD)); /* first result (status) */
|
|
if (errfunc) /* came from xpcall? */
|
|
lua_replace(L, 1); /* put first result in place of error function */
|
|
else /* came from pcall */
|
|
lua_insert(L, 1); /* open space for first result */
|
|
return lua_gettop(L);
|
|
}
|
|
|
|
|
|
static int luaB_pcall (lua_State *L) {
|
|
int status;
|
|
luaL_checkany(L, 1);
|
|
status = lua_pcallk(L, lua_gettop(L) - 1, LUA_MULTRET, 0, 0, pcallcont);
|
|
luaL_checkstack(L, 1, NULL);
|
|
lua_pushboolean(L, (status == LUA_OK));
|
|
lua_insert(L, 1);
|
|
return lua_gettop(L); /* return status + all results */
|
|
}
|
|
|
|
|
|
static int luaB_xpcall (lua_State *L) {
|
|
int status;
|
|
int n = lua_gettop(L);
|
|
luaL_argcheck(L, n >= 2, 2, "value expected");
|
|
lua_pushvalue(L, 1); /* exchange function... */
|
|
lua_copy(L, 2, 1); /* ...and error handler */
|
|
lua_replace(L, 2);
|
|
status = lua_pcallk(L, n - 2, LUA_MULTRET, 1, 1, pcallcont);
|
|
luaL_checkstack(L, 1, NULL);
|
|
lua_pushboolean(L, (status == LUA_OK));
|
|
lua_replace(L, 1);
|
|
return lua_gettop(L); /* return status + all results */
|
|
}
|
|
|
|
|
|
static int luaB_tostring (lua_State *L) {
|
|
luaL_checkany(L, 1);
|
|
luaL_tolstring(L, 1, NULL);
|
|
return 1;
|
|
}
|
|
|
|
|
|
static int luaB_newproxy (lua_State *L) {
|
|
lua_settop(L, 1);
|
|
lua_newuserdata(L, 0); /* create proxy */
|
|
if (lua_toboolean(L, 1) == 0)
|
|
return 1; /* no metatable */
|
|
else if (lua_isboolean(L, 1)) {
|
|
lua_createtable(L, 0, 1); /* create a new metatable `m' ... */
|
|
lua_pushboolean(L, 1);
|
|
lua_setfield(L, -2, "__gc"); /* ... m.__gc = false (HACK!!)... */
|
|
lua_pushvalue(L, -1); /* ... and mark `m' as a valid metatable */
|
|
lua_pushboolean(L, 1);
|
|
lua_rawset(L, lua_upvalueindex(1)); /* weaktable[m] = true */
|
|
}
|
|
else {
|
|
int validproxy = 0; /* to check if weaktable[metatable(u)] == true */
|
|
if (lua_getmetatable(L, 1)) {
|
|
lua_rawget(L, lua_upvalueindex(1));
|
|
validproxy = lua_toboolean(L, -1);
|
|
lua_pop(L, 1); /* remove value */
|
|
}
|
|
luaL_argcheck(L, validproxy, 1, "boolean or proxy expected");
|
|
lua_getmetatable(L, 1); /* metatable is valid; get it */
|
|
}
|
|
lua_setmetatable(L, 2);
|
|
return 1;
|
|
}
|
|
|
|
|
|
static const luaL_Reg base_funcs[] = {
|
|
{"assert", luaB_assert},
|
|
{"collectgarbage", luaB_collectgarbage},
|
|
{"dofile", luaB_dofile},
|
|
{"error", luaB_error},
|
|
{"getfenv", luaB_getfenv},
|
|
{"getmetatable", luaB_getmetatable},
|
|
{"ipairs", luaB_ipairs},
|
|
{"loadfile", luaB_loadfile},
|
|
{"load", luaB_load},
|
|
{"loadin", luaB_loadin},
|
|
{"loadstring", luaB_loadstring},
|
|
{"next", luaB_next},
|
|
{"pairs", luaB_pairs},
|
|
{"pcall", luaB_pcall},
|
|
{"print", luaB_print},
|
|
{"rawequal", luaB_rawequal},
|
|
{"rawget", luaB_rawget},
|
|
{"rawset", luaB_rawset},
|
|
{"select", luaB_select},
|
|
{"setfenv", luaB_setfenv},
|
|
{"setmetatable", luaB_setmetatable},
|
|
{"tonumber", luaB_tonumber},
|
|
{"tostring", luaB_tostring},
|
|
{"type", luaB_type},
|
|
{"xpcall", luaB_xpcall},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
|
|
LUAMOD_API int luaopen_base (lua_State *L) {
|
|
/* set global _G */
|
|
lua_pushglobaltable(L);
|
|
lua_pushglobaltable(L);
|
|
lua_setfield(L, -2, "_G");
|
|
/* open lib into global table */
|
|
luaL_setfuncs(L, base_funcs, 0);
|
|
lua_pushliteral(L, LUA_VERSION);
|
|
lua_setfield(L, -2, "_VERSION"); /* set global _VERSION */
|
|
/* `newproxy' needs a weaktable as upvalue */
|
|
lua_createtable(L, 0, 1); /* new table `w' */
|
|
lua_pushvalue(L, -1); /* `w' will be its own metatable */
|
|
lua_setmetatable(L, -2);
|
|
lua_pushliteral(L, "kv");
|
|
lua_setfield(L, -2, "__mode"); /* metatable(w).__mode = "kv" */
|
|
lua_pushcclosure(L, luaB_newproxy, 1);
|
|
lua_setfield(L, -2, "newproxy"); /* set global `newproxy' */
|
|
return 1;
|
|
}
|
|
|