| rev |
line source |
|
jbe@0
|
1 #include <lua.h>
|
|
jbe@0
|
2 #include <lauxlib.h>
|
|
jbe@0
|
3 #include "seqlualib.h"
|
|
jbe@0
|
4
|
|
jbe@30
|
5 #define SEQLUA_ITERTYPE_IPAIRS 1
|
|
jbe@30
|
6 #define SEQLUA_ITERTYPE_CALL 2
|
|
jbe@30
|
7 #define SEQLUA_ITERTYPE_INDEX 3
|
|
jbe@30
|
8 #define SEQLUA_ITERTYPE_RAW 4
|
|
jbe@0
|
9
|
|
jbe@0
|
10 void seqlua_iterinit(lua_State *L, seqlua_Iterator *iter, int idx) {
|
|
jbe@30
|
11 if (luaL_getmetafield(L, idx, "__ipairs")) {
|
|
jbe@30
|
12 lua_pushvalue(L, idx);
|
|
jbe@30
|
13 lua_call(L, 1, 3);
|
|
jbe@30
|
14 iter->itertype = SEQLUA_ITERTYPE_IPAIRS;
|
|
jbe@30
|
15 } else {
|
|
jbe@30
|
16 if (lua_type(L, idx) == LUA_TFUNCTION) {
|
|
jbe@30
|
17 iter->itertype = SEQLUA_ITERTYPE_CALL;
|
|
jbe@32
|
18 } else if (luaL_getmetafield(L, idx, "__index")) {
|
|
jbe@30
|
19 lua_pop(L, 1);
|
|
jbe@30
|
20 iter->itertype = SEQLUA_ITERTYPE_INDEX;
|
|
jbe@30
|
21 } else {
|
|
jbe@30
|
22 luaL_checktype(L, idx, LUA_TTABLE);
|
|
jbe@30
|
23 iter->itertype = SEQLUA_ITERTYPE_RAW;
|
|
jbe@30
|
24 }
|
|
jbe@30
|
25 // always occupy 3 stack indicies
|
|
jbe@30
|
26 lua_pushnil(L);
|
|
jbe@30
|
27 lua_pushnil(L);
|
|
jbe@30
|
28 lua_pushnil(L);
|
|
jbe@30
|
29 iter->idx = idx;
|
|
jbe@30
|
30 }
|
|
jbe@0
|
31 iter->L = L;
|
|
jbe@0
|
32 iter->i = 0;
|
|
jbe@0
|
33 }
|
|
jbe@0
|
34
|
|
jbe@0
|
35 int seqlua_iternext(seqlua_Iterator *iter) {
|
|
jbe@0
|
36 lua_State *L = iter->L;
|
|
jbe@0
|
37 lua_Integer i = ++iter->i;
|
|
jbe@0
|
38 switch (iter->itertype) {
|
|
jbe@30
|
39 case SEQLUA_ITERTYPE_IPAIRS:
|
|
jbe@30
|
40 lua_pushvalue(L, -3);
|
|
jbe@30
|
41 lua_pushvalue(L, -3);
|
|
jbe@30
|
42 lua_pushvalue(L, -3);
|
|
jbe@30
|
43 lua_call(L, 2, 2);
|
|
jbe@30
|
44 if (lua_isnil(L, -2)) {
|
|
jbe@30
|
45 lua_pop(L, 5);
|
|
jbe@30
|
46 return 0;
|
|
jbe@30
|
47 }
|
|
jbe@30
|
48 lua_remove(L, -3);
|
|
jbe@30
|
49 return 1;
|
|
jbe@30
|
50 case SEQLUA_ITERTYPE_CALL:
|
|
jbe@8
|
51 lua_pushvalue(L, iter->idx);
|
|
jbe@0
|
52 lua_call(L, 0, 1);
|
|
jbe@0
|
53 break;
|
|
jbe@30
|
54 case SEQLUA_ITERTYPE_INDEX:
|
|
jbe@0
|
55 lua_pushinteger(L, i);
|
|
jbe@8
|
56 lua_gettable(L, iter->idx);
|
|
jbe@32
|
57 break;
|
|
jbe@0
|
58 case SEQLUA_ITERTYPE_RAW:
|
|
jbe@8
|
59 lua_rawgeti(L, iter->idx, i);
|
|
jbe@8
|
60 break;
|
|
jbe@0
|
61 }
|
|
jbe@0
|
62 if (lua_isnil(L, -1)) {
|
|
jbe@30
|
63 lua_pop(L, 4);
|
|
jbe@0
|
64 return 0;
|
|
jbe@0
|
65 }
|
|
jbe@0
|
66 return 1;
|
|
jbe@0
|
67 }
|
|
jbe@0
|
68
|