| 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@15
|
5 #define SEQLUA_ITERTYPE_FUNC 1
|
|
jbe@15
|
6 #define SEQLUA_ITERTYPE_META 2
|
|
jbe@15
|
7 #define SEQLUA_ITERTYPE_RAW 3
|
|
jbe@0
|
8
|
|
jbe@0
|
9 void seqlua_iterinit(lua_State *L, seqlua_Iterator *iter, int idx) {
|
|
jbe@0
|
10 luaL_checkany(L, idx); // provides better error message
|
|
jbe@0
|
11 iter->L = L;
|
|
jbe@15
|
12 iter->idx = idx;
|
|
jbe@15
|
13 if (lua_type(L, idx) == LUA_TFUNCTION) {
|
|
jbe@0
|
14 iter->itertype = SEQLUA_ITERTYPE_FUNC;
|
|
jbe@15
|
15 } else if (luaL_getmetafield(L, idx, "__call")) {
|
|
jbe@15
|
16 lua_pop(L, 1);
|
|
jbe@15
|
17 iter->itertype = SEQLUA_ITERTYPE_FUNC;
|
|
jbe@15
|
18 } else if (luaL_getmetafield(L, idx, "__index")) {
|
|
jbe@15
|
19 lua_pop(L, 1);
|
|
jbe@15
|
20 iter->itertype = SEQLUA_ITERTYPE_META;
|
|
jbe@0
|
21 } else {
|
|
jbe@15
|
22 luaL_checktype(L, idx, LUA_TTABLE);
|
|
jbe@15
|
23 iter->itertype = SEQLUA_ITERTYPE_RAW;
|
|
jbe@0
|
24 }
|
|
jbe@0
|
25 iter->i = 0;
|
|
jbe@0
|
26 }
|
|
jbe@0
|
27
|
|
jbe@0
|
28 int seqlua_iternext(seqlua_Iterator *iter) {
|
|
jbe@0
|
29 lua_State *L = iter->L;
|
|
jbe@0
|
30 lua_Integer i = ++iter->i;
|
|
jbe@0
|
31 switch (iter->itertype) {
|
|
jbe@0
|
32 case SEQLUA_ITERTYPE_FUNC:
|
|
jbe@8
|
33 lua_pushvalue(L, iter->idx);
|
|
jbe@0
|
34 lua_call(L, 0, 1);
|
|
jbe@0
|
35 break;
|
|
jbe@0
|
36 case SEQLUA_ITERTYPE_META:
|
|
jbe@0
|
37 lua_pushinteger(L, i);
|
|
jbe@8
|
38 lua_gettable(L, iter->idx);
|
|
jbe@0
|
39 break;
|
|
jbe@0
|
40 case SEQLUA_ITERTYPE_RAW:
|
|
jbe@8
|
41 lua_rawgeti(L, iter->idx, i);
|
|
jbe@8
|
42 break;
|
|
jbe@0
|
43 }
|
|
jbe@0
|
44 if (lua_isnil(L, -1)) {
|
|
jbe@15
|
45 lua_pop(L, 1);
|
|
jbe@0
|
46 return 0;
|
|
jbe@0
|
47 }
|
|
jbe@0
|
48 return 1;
|
|
jbe@0
|
49 }
|
|
jbe@0
|
50
|
|
jbe@0
|
51 static int seqlua_iterclosureaux_raw(lua_State *L) {
|
|
jbe@0
|
52 lua_Integer i = lua_tointeger(L, lua_upvalueindex(2)) + 1;
|
|
jbe@0
|
53 lua_rawgeti(L, lua_upvalueindex(1), i);
|
|
jbe@0
|
54 if (lua_isnil(L, -1)) return 1;
|
|
jbe@0
|
55 lua_pushinteger(L, i);
|
|
jbe@0
|
56 lua_replace(L, lua_upvalueindex(2));
|
|
jbe@0
|
57 return 1;
|
|
jbe@0
|
58 }
|
|
jbe@0
|
59
|
|
jbe@0
|
60 static int seqlua_iterclosureaux_meta(lua_State *L) {
|
|
jbe@0
|
61 lua_Integer i = lua_tointeger(L, lua_upvalueindex(2)) + 1;
|
|
jbe@0
|
62 lua_pushinteger(L, i);
|
|
jbe@0
|
63 lua_gettable(L, lua_upvalueindex(1));
|
|
jbe@0
|
64 if (lua_isnil(L, -1)) return 1;
|
|
jbe@0
|
65 lua_pushinteger(L, i);
|
|
jbe@0
|
66 lua_replace(L, lua_upvalueindex(2));
|
|
jbe@0
|
67 return 1;
|
|
jbe@0
|
68 }
|
|
jbe@0
|
69
|
|
jbe@0
|
70 void seqlua_iterclosure(lua_State *L, int idx) {
|
|
jbe@8
|
71 luaL_checkany(L, idx); // provides better error message
|
|
jbe@0
|
72 if (lua_type(L, idx) == LUA_TFUNCTION) {
|
|
jbe@0
|
73 // do nothing
|
|
jbe@0
|
74 } else if (luaL_getmetafield(L, idx, "__call")) {
|
|
jbe@15
|
75 lua_pop(L, 1);
|
|
jbe@0
|
76 } else if (luaL_getmetafield(L, idx, "__index")) {
|
|
jbe@0
|
77 lua_pop(L, 1);
|
|
jbe@0
|
78 lua_pushvalue(L, idx);
|
|
jbe@0
|
79 lua_pushinteger(L, 0);
|
|
jbe@17
|
80 lua_pushcclosure(L, seqlua_iterclosureaux_meta, 2);
|
|
jbe@0
|
81 lua_replace(L, idx);
|
|
jbe@0
|
82 } else {
|
|
jbe@0
|
83 luaL_checktype(L, idx, LUA_TTABLE);
|
|
jbe@0
|
84 lua_pushvalue(L, idx);
|
|
jbe@0
|
85 lua_pushinteger(L, 0);
|
|
jbe@17
|
86 lua_pushcclosure(L, seqlua_iterclosureaux_raw, 2);
|
|
jbe@0
|
87 lua_replace(L, idx);
|
|
jbe@0
|
88 }
|
|
jbe@0
|
89 }
|
|
jbe@0
|
90
|