| /* BEGIN CSTYLED */ |
| /* |
| ** $Id: lbaselib.c,v 1.276.1.1 2013/04/12 18:48:47 roberto Exp $ |
| ** Basic library |
| ** See Copyright Notice in lua.h |
| */ |
| |
| /* The following built-in lua functions have been removed and are not available |
| * for use in ZFS channel programs: |
| * |
| * dofile |
| * loadfile |
| * load |
| * pcall |
| * print |
| * xpcall |
| */ |
| |
| |
| #define lbaselib_c |
| #define LUA_LIB |
| |
| #include <sys/lua/lua.h> |
| |
| #include <sys/lua/lauxlib.h> |
| #include <sys/lua/lualib.h> |
| |
| #define SPACECHARS " \f\n\r\t\v" |
| |
| static int luaB_tonumber (lua_State *L) { |
| if (lua_isnoneornil(L, 2)) { /* standard conversion */ |
| int isnum; |
| lua_Number n = lua_tonumberx(L, 1, &isnum); |
| if (isnum) { |
| lua_pushnumber(L, n); |
| return 1; |
| } /* else not a number; must be something */ |
| luaL_checkany(L, 1); |
| } |
| else { |
| size_t l; |
| const char *s = luaL_checklstring(L, 1, &l); |
| const char *e = s + l; /* end point for 's' */ |
| int base = luaL_checkint(L, 2); |
| int neg = 0; |
| luaL_argcheck(L, 2 <= base && base <= 36, 2, "base out of range"); |
| s += strspn(s, SPACECHARS); /* skip initial spaces */ |
| if (*s == '-') { s++; neg = 1; } /* handle signal */ |
| else if (*s == '+') s++; |
| if (isalnum((unsigned char)*s)) { |
| lua_Number n = 0; |
| do { |
| int digit = (isdigit((unsigned char)*s)) ? *s - '0' |
| : toupper((unsigned char)*s) - 'A' + 10; |
| if (digit >= base) break; /* invalid numeral; force a fail */ |
| n = n * (lua_Number)base + (lua_Number)digit; |
| s++; |
| } while (isalnum((unsigned char)*s)); |
| s += strspn(s, SPACECHARS); /* skip trailing spaces */ |
| if (s == e) { /* no invalid trailing characters? */ |
| lua_pushnumber(L, (neg) ? -n : n); |
| return 1; |
| } /* else not a number */ |
| } /* else not a number */ |
| } |
| lua_pushnil(L); /* 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_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_rawlen (lua_State *L) { |
| int t = lua_type(L, 1); |
| luaL_argcheck(L, t == LUA_TTABLE || t == LUA_TSTRING, 1, |
| "table or string expected"); |
| lua_pushinteger(L, lua_rawlen(L, 1)); |
| 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", "generational", "incremental", 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 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 luaB_tostring (lua_State *L) { |
| luaL_checkany(L, 1); |
| luaL_tolstring(L, 1, NULL); |
| return 1; |
| } |
| |
| static const luaL_Reg base_funcs[] = { |
| {"assert", luaB_assert}, |
| {"collectgarbage", luaB_collectgarbage}, |
| {"error", luaB_error}, |
| {"getmetatable", luaB_getmetatable}, |
| {"ipairs", luaB_ipairs}, |
| #if defined(LUA_COMPAT_LOADSTRING) |
| {"loadstring", luaB_load}, |
| #endif |
| {"next", luaB_next}, |
| {"pairs", luaB_pairs}, |
| {"rawequal", luaB_rawequal}, |
| {"rawlen", luaB_rawlen}, |
| {"rawget", luaB_rawget}, |
| {"rawset", luaB_rawset}, |
| {"select", luaB_select}, |
| {"setmetatable", luaB_setmetatable}, |
| {"tonumber", luaB_tonumber}, |
| {"tostring", luaB_tostring}, |
| {"type", luaB_type}, |
| {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 */ |
| return 1; |
| } |
| |
| #if defined(_KERNEL) |
| |
| EXPORT_SYMBOL(luaopen_base); |
| |
| #endif |
| /* END CSTYLED */ |