1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
/*
** $Id: ldblib.c,v 1.14 2000/05/08 13:21:35 roberto Exp roberto $
** Interface from Lua to its debug API
** See Copyright Notice in lua.h
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define LUA_REENTRANT
#include "lauxlib.h"
#include "lua.h"
#include "luadebug.h"
#include "lualib.h"
static void settabss (lua_State *L, lua_Object t, const char *i, const char *v) {
lua_pushobject(L, t);
lua_pushstring(L, i);
lua_pushstring(L, v);
lua_settable(L);
}
static void settabsi (lua_State *L, lua_Object t, const char *i, int v) {
lua_pushobject(L, t);
lua_pushstring(L, i);
lua_pushnumber(L, v);
lua_settable(L);
}
static void settabso (lua_State *L, lua_Object t, const char *i, lua_Object v) {
lua_pushobject(L, t);
lua_pushstring(L, i);
lua_pushobject(L, v);
lua_settable(L);
}
static void getinfo (lua_State *L) {
lua_Debug ar;
lua_Object res;
lua_Object func = lua_getparam(L, 1);
const char *options = luaL_opt_string(L, 2, "flnSu");
char buff[20];
if (lua_isnumber(L, func)) {
if (!lua_getstack(L, lua_getnumber(L, func), &ar)) {
lua_pushnil(L); /* level out of range */
return;
}
}
else if (lua_isfunction(L, func)) {
ar.func = func;
sprintf(buff, ">%.10s", options);
options = buff;
}
else
luaL_argerror(L, 1, "function or level expected");
res = lua_createtable(L);
if (!lua_getinfo(L, options, &ar))
luaL_argerror(L, 2, "invalid option");
for (; *options; options++) {
switch (*options) {
case 'S':
settabss(L, res, "source", ar.source);
settabsi(L, res, "linedefined", ar.linedefined);
settabss(L, res, "what", ar.what);
break;
case 'l':
settabsi(L, res, "currentline", ar.currentline);
break;
case 'u':
settabsi(L, res, "nups", ar.nups);
break;
case 'n':
settabss(L, res, "name", ar.name);
settabss(L, res, "namewhat", ar.namewhat);
break;
case 'f':
settabso(L, res, "func", ar.func);
break;
}
}
lua_pushobject(L, res);
}
static void getlocal (lua_State *L) {
lua_Debug ar;
lua_Localvar lvar;
if (!lua_getstack(L, luaL_check_int(L, 1), &ar)) /* level out of range? */
luaL_argerror(L, 1, "level out of range");
lvar.index = luaL_check_int(L, 2);
if (lua_getlocal(L, &ar, &lvar)) {
lua_pushstring(L, lvar.name);
lua_pushobject(L, lvar.value);
}
else lua_pushnil(L);
}
static void setlocal (lua_State *L) {
lua_Debug ar;
lua_Localvar lvar;
if (!lua_getstack(L, luaL_check_int(L, 1), &ar)) /* level out of range? */
luaL_argerror(L, 1, "level out of range");
lvar.index = luaL_check_int(L, 2);
lvar.value = luaL_nonnullarg(L, 3);
if (lua_setlocal(L, &ar, &lvar))
lua_pushstring(L, lvar.name);
else lua_pushnil(L);
}
/*
** because of these variables, this module is not reentrant, and should
** not be used in multiple states
*/
static int linehook = LUA_NOREF; /* Lua reference to line hook function */
static int callhook = LUA_NOREF; /* Lua reference to call hook function */
static void linef (lua_State *L, lua_Debug *ar) {
if (linehook != LUA_NOREF) {
lua_pushnumber(L, ar->currentline);
lua_callfunction(L, lua_getref(L, linehook));
}
}
static void callf (lua_State *L, lua_Debug *ar) {
if (callhook != LUA_NOREF) {
lua_pushstring(L, ar->event);
lua_callfunction(L, lua_getref(L, callhook));
}
}
static void setcallhook (lua_State *L) {
lua_Object f = lua_getparam(L, 1);
lua_unref(L, callhook);
if (f == LUA_NOOBJECT) {
callhook = LUA_NOREF;
lua_setcallhook(L, NULL);
}
else {
lua_pushobject(L, f);
callhook = lua_ref(L, 1);
lua_setcallhook(L, callf);
}
}
static void setlinehook (lua_State *L) {
lua_Object f = lua_getparam(L, 1);
lua_unref(L, linehook);
if (f == LUA_NOOBJECT) {
linehook = LUA_NOREF;
lua_setlinehook(L, NULL);
}
else {
lua_pushobject(L, f);
linehook = lua_ref(L, 1);
lua_setlinehook(L, linef);
}
}
static const struct luaL_reg dblib[] = {
{"getlocal", getlocal},
{"getinfo", getinfo},
{"setcallhook", setcallhook},
{"setlinehook", setlinehook},
{"setlocal", setlocal}
};
void lua_dblibopen (lua_State *L) {
luaL_openl(L, dblib);
}
|
