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-rw-r--r--lib/BLua.cc186
1 files changed, 178 insertions, 8 deletions
diff --git a/lib/BLua.cc b/lib/BLua.cc
index 8aba47e..14ab466 100644
--- a/lib/BLua.cc
+++ b/lib/BLua.cc
@@ -17,10 +17,11 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-/* $Id: BLua.cc,v 1.32 2005-10-13 16:00:37 pixel Exp $ */
+/* $Id: BLua.cc,v 1.33 2005-12-01 14:29:20 pixel Exp $ */
#include <stdlib.h>
#include "BLua.h"
+#include "Buffer.h"
#include <lualib.h>
#ifndef BUFFERSIZE
@@ -69,6 +70,9 @@ class LuaStatics : public Base {
static int hex(lua_State *);
static int shl(lua_State *);
static int shr(lua_State *);
+
+ static int getglobal(lua_State *);
+ static int dumpvars(lua_State *);
};
std::map<lua_State *, Lua *> Lua::lualist;
@@ -98,7 +102,7 @@ int LuaStatics::andB(lua_State * __L) {
int n = L->gettop();
Uint32 a, b;
- if ((n != 2) && !L->isnumber(1) && !L->isnumber(2)) {
+ if ((n != 2) || !L->isnumber(1) || !L->isnumber(2)) {
L->error("Incorrect arguments to function `andB'");
}
@@ -115,7 +119,7 @@ int LuaStatics::orB(lua_State * __L) {
int n = L->gettop();
Uint32 a, b;
- if ((n != 2) && !L->isnumber(1) && !L->isnumber(2)) {
+ if ((n != 2) || !L->isnumber(1) || !L->isnumber(2)) {
L->error("Incorrect arguments to function `orB'");
}
@@ -132,7 +136,7 @@ int LuaStatics::xorB(lua_State * __L) {
int n = L->gettop();
Uint32 a, b;
- if ((n != 2) && !L->isnumber(1) && !L->isnumber(2)) {
+ if ((n != 2) || !L->isnumber(1) || !L->isnumber(2)) {
L->error("Incorrect arguments to function `xorB'");
}
@@ -149,7 +153,7 @@ int LuaStatics::notB(lua_State * __L) {
int n = L->gettop();
Uint32 x;
- if ((n != 1) && !L->isnumber()) {
+ if ((n != 1) || !L->isnumber()) {
L->error("Incorrect arguments to function `notB'");
}
@@ -165,7 +169,7 @@ int LuaStatics::shl(lua_State * __L) {
int n = L->gettop();
Uint32 a, b;
- if ((n > 2) && !L->isnumber(1) && ((n == 2) && !L->isnumber(2))) {
+ if ((n > 2) || !L->isnumber(1) || ((n == 2) && !L->isnumber(2))) {
L->error("Incorrect arguments to function `shl'");
}
@@ -185,7 +189,7 @@ int LuaStatics::shr(lua_State * __L) {
int n = L->gettop();
Uint32 a, b;
- if ((n > 2) && !L->isnumber(1) && ((n == 2) && !L->isnumber(2))) {
+ if ((n > 2) || !L->isnumber(1) || ((n == 2) && !L->isnumber(2))) {
L->error("Incorrect arguments to function `shr'");
}
@@ -206,7 +210,7 @@ int LuaStatics::hex(lua_State * __L) {
int x;
String r;
- if (((n != 1) || (n != 2)) && !L->isnumber(1) && ((n == 2) && !L->isstring(2))) {
+ if (((n != 1) && (n != 2)) || !L->isnumber(1) || ((n == 2) && !L->isstring(2))) {
L->error("Incorrect arguments to function `hex'");
}
@@ -219,6 +223,50 @@ int LuaStatics::hex(lua_State * __L) {
return 1;
}
+int LuaStatics::getglobal(lua_State * _L) {
+ Lua * L = Lua::find(_L);
+ int n = L->gettop();
+
+ if ((n != 1) || !L->isstring(1)) {
+ L->error("Incorrect arguments to function `getglobal'");
+ }
+
+ Buffer b;
+ b << "return " + L->tostring();
+
+ L->load(&b, false);
+ L->call(0, 1);
+ return 1;
+}
+
+int LuaStatics::dumpvars(lua_State * _L) {
+ Lua * L = Lua::find(_L);
+ int n = L->gettop();
+ Handle * h;
+ String prefix;
+ String varname;
+
+ if ((n > 3) || (n < 2) || !L->isobject(1) ||
+ ((n == 2) && !L->isstring(2)) ||
+ ((n == 3) && !L->isstring(3) && !L->istable(2) && !L->isstring(2))) {
+ L->error("Incorrect arguments to function `dumpvars'");
+ }
+
+ prefix = L->tostring(n);
+
+ if (n == 3)
+ L->pop();
+
+ if (L->isstring(2))
+ L->getglobal(L->tostring(2));
+
+ h = (Handle *) LuaObject::getme(L);
+
+ L->dumpvars(h, prefix);
+
+ return 0;
+}
+
Lua::Lua() : L(lua_open()) {
lualist[L] = this;
lua_atpanic(L, LuaStatics::luapanic);
@@ -231,6 +279,8 @@ Lua::Lua() : L(lua_open()) {
declarefunc("shl", LuaStatics::shl);
declarefunc("shr", LuaStatics::shr);
declarefunc("hex", LuaStatics::hex);
+ declarefunc("getglobal", LuaStatics::getglobal);
+ declarefunc("dumpvars", LuaStatics::dumpvars);
}
Lua::Lua(lua_State * __L) : L(__L), _protected(false) {
@@ -391,6 +441,19 @@ int Lua::gettop() {
return lua_gettop(L);
}
+void Lua::getglobal(const String & name) throw (GeneralException) {
+ Buffer b;
+ b << "return " + name;
+
+ try {
+ load(&b, false);
+ call(0, 1);
+ }
+ catch (LuaException & l) {
+ throw LuaException("Error finding global variable `" + name + "'");
+ }
+}
+
void Lua::push_lua_context() {
String whole_msg;
struct lua_Debug ar;
@@ -554,6 +617,113 @@ void Lua::dump(Handle * h, bool strip) {
luacmain(L, strip, LuaStatics::putF, &lf);
}
+void Lua::dumpvars(Handle * h, const String & prefix, int i) {
+ Buffer b;
+
+ b << prefix << " = {\n";
+ dumpvars_r(&b, i);
+ b << "}\n";
+
+ b.copyto(h);
+}
+
+void Lua::dumpvars_r(Handle * h, int i, int depth) throw (GeneralException) {
+ int j;
+ String t;
+ bool dump_value;
+
+ if (lua_type(L, i) != LUA_TTABLE)
+ throw LuaException("Error dumping variables: variable isn't a table.");
+
+ push();
+
+ if (i < 0)
+ i--;
+
+ depth++;
+
+ while(lua_next(L, i) != 0) {
+ for (j = 0; j < depth; j++) {
+ (*h) << " ";
+ }
+
+ dump_value = true;
+
+ // first, let's dump the key.
+ switch(lua_type(L, -2)) {
+ case LUA_TNONE:
+ throw LuaException("Internal error: got invalid index for key while dumpvars.");
+ case LUA_TNIL:
+ throw LuaException("Internal error: got nil index for key while dumpvars.");
+ case LUA_TNUMBER:
+ t.set("[%.14g] = ", lua_tonumber(L, -2));
+ break;
+ case LUA_TBOOLEAN:
+ t = String("[") + (lua_toboolean(L, -2) ? "true" : "false") + "] = ";
+ break;
+ case LUA_TSTRING:
+ t = lua_tostring(L, -2) + String(" = ");
+ break;
+ case LUA_TTABLE:
+ t = "-- [a table]\n";
+ dump_value = false;
+ break;
+ case LUA_TFUNCTION:
+ t = "-- [function() ... end]\n";
+ dump_value = false;
+ break;
+ default:
+ throw LuaException("Internal error: got unknow index for key while dumpvars.");
+ }
+
+ // Seems that we can't dump that key.
+ if (!dump_value) {
+ pop();
+ (*h) << t;
+ continue;
+ }
+
+ // let's look at the value: if it's a function, we can't dump it.
+ if (lua_type(L, -1) == LUA_TFUNCTION)
+ (*h) << "-- ";
+
+ (*h) << t;
+
+ // Finally, let's dump the value.
+ switch(lua_type(L, -1)) {
+ case LUA_TNONE:
+ throw LuaException("Internal error: got invalid index for value while dumpvars.");
+ case LUA_TNIL:
+ (*h) << "nil,\n";
+ case LUA_TNUMBER:
+ t.set("%.14g,\n", lua_tonumber(L, -1));
+ (*h) << t;
+ break;
+ case LUA_TBOOLEAN:
+ (*h) << (lua_toboolean(L, -1) ? "true" : "false") << ",\n";
+ break;
+ case LUA_TSTRING:
+ (*h) << "\"" << lua_tostring(L, -1) << "\",\n";
+ break;
+ case LUA_TTABLE:
+ (*h) << "{\n";
+ dumpvars_r(h, -1, depth);
+ for (j = 0; j < depth; j++) {
+ (*h) << " ";
+ }
+ (*h) << "},\n";
+ break;
+ case LUA_TFUNCTION:
+ (*h) << "function() ... end\n";
+ break;
+ default:
+ throw LuaException("Internal error: got unknow index for value while dumpvars.");
+ }
+
+ pop();
+ }
+}
+
Lua * Lua::thread() {
return new Lua(lua_newthread(L));
}
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