/////////////////////////////////////////////////////////////////////////////// // // File : $Id: _dpb.cpp,v 1.2 2009/03/19 20:00:27 faust Exp $ // Subject : IBPP, internal DPB class implementation // /////////////////////////////////////////////////////////////////////////////// // // (C) Copyright 2000-2006 T.I.P. Group S.A. and the IBPP Team (www.ibpp.org) // // The contents of this file are subject to the IBPP License (the "License"); // you may not use this file except in compliance with the License. You may // obtain a copy of the License at http://www.ibpp.org or in the 'license.txt' // file which must have been distributed along with this file. // // This software, distributed under the License, is distributed on an "AS IS" // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the // License for the specific language governing rights and limitations // under the License. // /////////////////////////////////////////////////////////////////////////////// // // COMMENTS // * DPB == Database Parameter Block/Buffer, see Interbase 6.0 C-API // * Tabulations should be set every four characters when editing this file. // /////////////////////////////////////////////////////////////////////////////// #ifdef _MSC_VER #pragma warning(disable: 4786 4996) #ifndef _DEBUG #pragma warning(disable: 4702) #endif #endif #include "_ibpp.h" #ifdef HAS_HDRSTOP #pragma hdrstop #endif #include using namespace ibpp_internals; const int DPB::BUFFERINCR = 128; void DPB::Grow(int needed) { if (mBuffer == 0) ++needed; // Initial alloc will require one more byte if ((mSize + needed) > mAlloc) { // We need to grow the buffer. We use increments of BUFFERINCR bytes. needed = (needed / BUFFERINCR + 1) * BUFFERINCR; char* newbuffer = new char[mAlloc + needed]; if (mBuffer == 0) { // Initial allocation, initialize the version tag newbuffer[0] = isc_dpb_version1; mSize = 1; } else { // Move the old buffer content to the new one memcpy(newbuffer, mBuffer, mSize); delete [] mBuffer; } mBuffer = newbuffer; mAlloc += needed; } } void DPB::Insert(char type, const char* data) { int len = (int)strlen(data); Grow(len + 2); mBuffer[mSize++] = type; mBuffer[mSize++] = char(len); strncpy(&mBuffer[mSize], data, len); mSize += len; } void DPB::Insert(char type, int16_t data) { Grow(2 + 2); mBuffer[mSize++] = type; mBuffer[mSize++] = char(2); *(int16_t*)&mBuffer[mSize] = int16_t((*gds.Call()->m_vax_integer)((char*)&data, 2)); mSize += 2; } void DPB::Insert(char type, bool data) { Grow(2 + 1); mBuffer[mSize++] = type; mBuffer[mSize++] = char(1); mBuffer[mSize++] = char(data ? 1 : 0); } void DPB::Insert(char type, char data) { Grow(2 + 1); mBuffer[mSize++] = type; mBuffer[mSize++] = char(1); mBuffer[mSize++] = data; } void DPB::Reset() { if (mAlloc != 0) { delete [] mBuffer; mBuffer = 0; mSize = 0; mAlloc = 0; } } // // EOF //