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#include <glib.h> // g_ascii_strcasecmp |
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#include <lua.h> |
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#include <lauxlib.h> |
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#include "util.h" |
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enum_value_t string2enum (const char *string, const string2enum_t *set) |
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{ |
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while (set->string) { |
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if (!g_ascii_strcasecmp (string, set->string)) |
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return set->value; |
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++set; |
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} |
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return set->value; |
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} |
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const char *enum2string (enum_value_t value, const string2enum_t *set) |
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{ |
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while (set->string) { |
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if (value == set->value) |
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return set->string; |
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++set; |
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} |
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return NULL; |
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} |
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/// argument enum field |
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/// String that will be converted to number or just plain number, that will be passed as is. |
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/// Note, that if enum name is not recognized no error will be raised and default vale will be used. |
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enum_value_t luaL_checkenum (lua_State *L, int index, const string2enum_t *set) |
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{ |
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if (lua_type (L, index) == LUA_TNUMBER) |
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return lua_tointeger (L, index); |
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else |
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return string2enum (luaL_checkstring (L, index), set); |
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} |
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/// return enum field |
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/// String. If no string found, plain number will be returned. |
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void luaL_pushenum (lua_State *L, enum_value_t value, const string2enum_t *set) |
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{ |
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const char *string = enum2string (value, set); |
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if (string != NULL) |
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lua_pushstring (L, string); |
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else |
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lua_pushinteger (L, value); |
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} |
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/// argument flags field |
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/// Can be just plain number, then it is passed as is. |
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/// Can be a string, then it is recognized as a single enabled flag. |
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/// Or can be a table of the following format: |
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/// * integer keys should have string values, that will be used as enabled flag names or numerical values, that will be just ORed; |
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/// * string keys should be flag names, that will be enabled, if corresponding value contains true value. |
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enum_value_t luaL_checkenum_multi (lua_State *L, int index, const string2enum_t *set) |
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{ |
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int type = lua_type (L, index); |
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if (type == LUA_TNUMBER) |
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return lua_tointeger (L, index); |
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else if (type == LUA_TSTRING) |
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return string2enum (lua_tostring (L, index), set); |
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else if (type == LUA_TTABLE) { |
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enum_value_t retval = 0; |
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lua_pushnil (L); |
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while (lua_next (L, index) != 0) { |
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type = lua_type (L, -2); |
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if (type == LUA_TNUMBER) { |
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type = lua_type (L, -1); |
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if (type == LUA_TNUMBER) |
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retval |= lua_tointeger (L, -1); |
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else if (type == LUA_TSTRING) |
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retval |= string2enum (lua_tostring (L, -1), set); |
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else |
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luaL_argerror (L, index, "wrong value type of flag"); |
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} else if (type == LUA_TSTRING) { |
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if (lua_toboolean (L, -1)) |
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retval |= string2enum (lua_tostring (L, -2), set); |
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} else |
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luaL_argerror (L, index, "wrong key type of flags table"); |
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lua_pop (L, 1); |
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} |
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} else |
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luaL_argerror (L, index, "integer, string, or table of ones expected"); |
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return 0; // never happens |
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} |
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/// returned flags field |
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/// Is always a table with present flag names as keys with true values. |
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/// Not present flags are not present in table either. |
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/// Not recognized values, if present, will be stored as a number in a first sequential table member (table[1]). |
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void luaL_pushenum_multi (lua_State *L, enum_value_t value, const string2enum_t *set) |
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{ |
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enum_value_t matched = 0; |
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lua_newtable (L); |
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while (set->string) { |
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if (value & set->value) { |
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matched |= set->value & value; |
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lua_pushstring (L, set->string); |
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lua_pushboolean (L, 1); |
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lua_settable (L, -3); |
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} |
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++set; |
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} |
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if (value ^ matched) { |
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lua_pushinteger (L, 1); |
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lua_pushinteger (L, value ^ matched); |
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lua_settable (L, -3); |
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} |
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} |
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void *luaL_malloc (lua_State *L, size_t size) |
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{ |
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void *ud; |
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lua_Alloc allocf = lua_getallocf (L, &ud); |
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return (*allocf) (ud, NULL, 0, size); |
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} |
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void *luaL_realloc (lua_State *L, void *ptr, size_t osize, size_t nsize) |
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{ |
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void *ud; |
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lua_Alloc allocf = lua_getallocf (L, &ud); |
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return (*allocf) (ud, ptr, osize, nsize); |
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} |
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void luaL_free (lua_State *L, void *ptr) |
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{ |
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void *ud; |
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lua_Alloc allocf = lua_getallocf (L, &ud); |
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(*allocf) (ud, ptr, 1, 0); |
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} |
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