From ea7a6070439e85db5afcee399b920c975f4ea7d2 Mon Sep 17 00:00:00 2001
From: George Hazan <george.hazan@gmail.com>
Date: Mon, 5 Jan 2015 23:19:57 +0000
Subject: very-very first version (create, open, check headers)

git-svn-id: http://svn.miranda-ng.org/main/trunk@11777 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c
---
 plugins/Dbx_mdb/src/dbmodulechain.cpp | 120 ++++++++++++++++++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 plugins/Dbx_mdb/src/dbmodulechain.cpp

(limited to 'plugins/Dbx_mdb/src/dbmodulechain.cpp')

diff --git a/plugins/Dbx_mdb/src/dbmodulechain.cpp b/plugins/Dbx_mdb/src/dbmodulechain.cpp
new file mode 100644
index 0000000000..33cb289561
--- /dev/null
+++ b/plugins/Dbx_mdb/src/dbmodulechain.cpp
@@ -0,0 +1,120 @@
+/*
+
+Miranda NG: the free IM client for Microsoft* Windows*
+
+Copyright (ñ) 2012-15 Miranda NG project (http://miranda-ng.org)
+all portions of this codebase are copyrighted to the people
+listed in contributors.txt.
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*/
+
+#include "commonheaders.h"
+
+void CDbxMdb::AddToList(char *name, DWORD ofs)
+{
+	ModuleName *mn = (ModuleName*)HeapAlloc(m_hModHeap, 0, sizeof(ModuleName));
+	mn->name = name;
+	mn->ofs = ofs;
+
+	m_lMods.insert(mn);
+	m_lOfs.insert(mn);
+}
+
+int CDbxMdb::InitModuleNames(void)
+{
+	MDB_txn *txn;
+	mdb_txn_begin(m_pMdbEnv, NULL, 0, &txn);
+	mdb_open(txn, "mods", MDB_CREATE | MDB_DUPSORT | MDB_DUPFIXED, &m_dbModules);
+
+	MDB_cursor *cursor;
+	mdb_cursor_open(txn, m_dbModules, &cursor);
+
+	int rc, moduleId;
+	char moduleName[100];
+	MDB_val key = { sizeof(int), &moduleId }, data = { sizeof(moduleName), moduleName };
+	while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0)
+		AddToList(moduleName, moduleId);
+
+	mdb_cursor_close(cursor);
+	mdb_txn_abort(txn);
+	return 0;
+}
+
+DWORD CDbxMdb::FindExistingModuleNameOfs(const char *szName)
+{
+	ModuleName mn = { (char*)szName, 0 };
+	if (m_lastmn && !strcmp(mn.name, m_lastmn->name))
+		return m_lastmn->ofs;
+
+	int index = m_lMods.getIndex(&mn);
+	if (index != -1) {
+		ModuleName *pmn = m_lMods[index];
+		m_lastmn = pmn;
+		return pmn->ofs;
+	}
+
+	return 0;
+}
+
+// will create the offset if it needs to
+DWORD CDbxMdb::GetModuleNameOfs(const char *szName)
+{
+	DWORD ofsExisting = FindExistingModuleNameOfs(szName);
+	if (ofsExisting)
+		return ofsExisting;
+
+	if (m_bReadOnly)
+		return 0;
+
+	int nameLen = (int)strlen(szName);
+
+	// need to create the module name
+
+	// add to cache
+	char *mod = (char*)HeapAlloc(m_hModHeap, 0, nameLen + 1);
+	strcpy(mod, szName);
+	AddToList(mod, -1);
+
+	// quit
+	return -1;
+}
+
+char* CDbxMdb::GetModuleNameByOfs(DWORD ofs)
+{
+	if (m_lastmn && m_lastmn->ofs == ofs)
+		return m_lastmn->name;
+
+	ModuleName mn = { NULL, ofs };
+	int index = m_lOfs.getIndex(&mn);
+	if (index != -1) {
+		ModuleName *pmn = m_lOfs[index];
+		m_lastmn = pmn;
+		return pmn->name;
+	}
+
+	return NULL;
+}
+
+STDMETHODIMP_(BOOL) CDbxMdb::EnumModuleNames(DBMODULEENUMPROC pFunc, void *pParam)
+{
+	for (int i = 0; i < m_lMods.getCount(); i++) {
+		ModuleName *pmn = m_lMods[i];
+		int ret = pFunc(pmn->name, pmn->ofs, (LPARAM)pParam);
+		if (ret)
+			return ret;
+	}
+	return 0;
+}
-- 
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