initial import of sqlitex

dlls/sqlite/handles.cpp

@@ -0,0 +1,107 @@
+#include <string.h>
+#include "sh_stack.h"
+#include "CVector.h"
+#include "sqlite_header.h"
+
+struct QHandle
+{
+	void *_ptr;
+	FREEHANDLE _func;
+	HandleType type;
+	bool isfree;
+};
+
+CVector<QHandle *> g_Handles;
+CStack<unsigned int> g_FreeHandles;
+
+unsigned int MakeHandle(void *ptr, HandleType type, FREEHANDLE f)
+{
+	unsigned int num;
+	QHandle *h;
+
+	if (g_FreeHandles.size())
+	{
+		num = g_FreeHandles.front();
+		g_FreeHandles.pop();
+		h = g_Handles[num];
+	} else {
+		h = new QHandle;
+		g_Handles.push_back(h);
+		num = static_cast<unsigned int>(g_Handles.size()) - 1;
+	}
+
+	h->_ptr = ptr;
+	h->type = type;
+	h->_func = f;
+	h->isfree = false;
+
+	return num + 1;
+}
+
+void *GetHandle(unsigned int num, HandleType type)
+{
+	if (num == 0)
+		return NULL;
+
+	num--;
+	if (num >= g_Handles.size())
+		return NULL;
+
+	QHandle *h = g_Handles[num];
+	if (h->isfree || (h->type != type))
+		return NULL;
+
+	return h->_ptr;
+}
+
+bool FreeHandle(unsigned int num)
+{
+	if (num == 0)
+		return false;
+
+	unsigned int _num = num;
+
+	num--;
+	if (num >= g_Handles.size())
+		return false;
+
+	QHandle *h = g_Handles[num];
+	if (h->isfree)
+		return false;
+
+	h->_func(h->_ptr, _num);
+	h->_ptr = NULL;
+	h->_func = NULL;
+	h->isfree = true;
+	
+	g_FreeHandles.push(num);
+
+	return true;
+}
+
+void FreeAllHandles(HandleType type)
+{
+	QHandle *q;
+	for (size_t i = 0; i < g_Handles.size(); i++)
+	{
+		q = g_Handles[i];
+		if (q && !q->isfree && q->type == type)
+		{
+			FreeHandle((unsigned int)i);
+		}
+	}
+}
+
+void FreeHandleTable()
+{
+	QHandle *q;
+	for (size_t i = 0; i < g_Handles.size(); i++)
+	{
+		q = g_Handles[i];
+		if (q && !q->isfree)
+			FreeHandle((unsigned int)i);
+	}
+	g_Handles.clear();
+	while (!g_FreeHandles.empty())
+		g_FreeHandles.pop();
+}