[56] | 1 | // Copyright (C) 2012-2013 ChaosForge / Kornel Kisielewicz
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| 2 | // http://chaosforge.org/
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| 3 | //
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| 4 | // This file is part of NV Libraries.
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| 5 | // For conditions of distribution and use, see copyright notice in nv.hh
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| 6 |
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| 7 | #include "nv/lua/lua_aux.hh"
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| 8 |
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| 9 | static int nlua_table_copy( lua_State* L )
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| 10 | {
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| 11 | luaL_checktype( L, 1, LUA_TTABLE );
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| 12 | lua_settop( L, 1 );
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| 13 | lua_newtable(L);
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| 14 | lua_pushnil(L);
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| 15 | while ( lua_next( L, 1 ) != 0 )
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| 16 | {
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| 17 | lua_pushvalue(L, -2);
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| 18 | lua_insert(L, -2);
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| 19 | lua_settable(L, -4);
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| 20 | }
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| 21 | return 1;
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| 22 | }
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| 23 |
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| 24 | static int nlua_table_icopy( lua_State* L )
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| 25 | {
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| 26 | luaL_checktype( L, 1, LUA_TTABLE );
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| 27 | lua_settop( L, 1 );
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| 28 | lua_newtable(L);
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| 29 | int i = 0;
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| 30 | for(;;)
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| 31 | {
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| 32 | i++;
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| 33 | lua_rawgeti(L, 1, i);
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| 34 | if ( lua_isnil( L, -1 ) )
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| 35 | {
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| 36 | lua_pop( L, 1 );
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| 37 | break;
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| 38 | }
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| 39 | lua_rawseti(L, 2, i);
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| 40 | };
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| 41 | return 1;
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| 42 | }
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| 43 |
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| 44 | static int nlua_table_merge( lua_State* L )
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| 45 | {
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| 46 | luaL_checktype( L, 1, LUA_TTABLE );
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| 47 | luaL_checktype( L, 2, LUA_TTABLE );
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| 48 | lua_settop( L, 2 );
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| 49 | lua_pushnil(L);
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| 50 | while ( lua_next( L, 2 ) != 0 )
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| 51 | {
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| 52 | lua_pushvalue(L, -2);
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| 53 | lua_insert(L, -2);
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| 54 | lua_settable(L, 1);
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| 55 | }
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| 56 | return 0;
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| 57 | }
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| 58 |
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| 59 | static int nlua_table_imerge( lua_State* L )
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| 60 | {
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| 61 | luaL_checktype( L, 1, LUA_TTABLE );
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| 62 | luaL_checktype( L, 2, LUA_TTABLE );
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| 63 | lua_settop( L, 2 );
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| 64 | int i = 0;
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| 65 | for(;;)
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| 66 | {
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| 67 | i++;
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| 68 | lua_rawgeti(L, 2, i);
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| 69 | if ( lua_isnil( L, -1 ) )
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| 70 | {
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| 71 | lua_pop( L, 1 );
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| 72 | break;
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| 73 | }
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| 74 | lua_rawseti(L, 1, i);
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| 75 | };
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| 76 | return 0;
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| 77 | }
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| 78 |
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| 79 | static int nlua_table_reversed( lua_State* L )
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| 80 | {
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| 81 | luaL_checktype( L, 1, LUA_TTABLE );
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| 82 | lua_settop( L, 1 );
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| 83 | int len = lua_rawlen(L,1);
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| 84 | int i = len;
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| 85 | lua_createtable(L,len,0);
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| 86 | while ( i != 0 )
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| 87 | {
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| 88 | lua_rawgeti(L, 1, i);
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| 89 | lua_rawseti(L, 2, len-i+1);
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| 90 | i--;
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| 91 | }
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| 92 | return 1;
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| 93 | }
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| 94 |
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| 95 | static int nlua_table_toset( lua_State* L )
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| 96 | {
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| 97 | luaL_checktype( L, 1, LUA_TTABLE );
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| 98 | lua_settop( L, 1 );
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| 99 | lua_newtable(L);
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| 100 | int i = 0;
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| 101 | for(;;)
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| 102 | {
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| 103 | i++;
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| 104 | lua_rawgeti(L, 1, i);
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| 105 | if ( lua_isnil( L, -1 ) )
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| 106 | {
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| 107 | lua_pop( L, 1 );
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| 108 | break;
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| 109 | }
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| 110 | lua_pushboolean( L, true );
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| 111 | lua_rawset(L, 2);
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| 112 | };
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| 113 | return 1;
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| 114 | }
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| 115 |
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| 116 | static const struct luaL_Reg nlua_table_aux_f [] = {
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| 117 | { "copy", nlua_table_copy },
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| 118 | { "icopy", nlua_table_icopy },
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| 119 | { "merge", nlua_table_merge },
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| 120 | { "imerge", nlua_table_imerge },
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| 121 | { "reversed", nlua_table_reversed },
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| 122 | { "toset", nlua_table_toset },
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| 123 | { NULL, NULL }
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| 124 | };
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| 125 |
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| 126 | static const struct luaL_Reg nlua_math_aux_f [] = {
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| 127 | { NULL, NULL }
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| 128 | };
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| 129 |
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| 130 | void nlua_register_aux( lua_State* L )
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| 131 | {
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| 132 | lua_getglobal( L, "table" );
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| 133 | luaL_setfuncs( L, nlua_table_aux_f, 0 );
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| 134 | lua_pop( L, 1 );
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| 135 |
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| 136 | lua_getglobal( L, "math" );
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| 137 | luaL_setfuncs( L, nlua_math_aux_f, 0 );
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| 138 | lua_pop( L, 1 );
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| 139 | }
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| 140 |
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