chxfmtpparse.cpp
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- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: chxfmtpparse.cpp,v 1.6.2.1 2004/07/09 02:05:16 hubbe Exp $
- *
- * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file,
- * are subject to the current version of the RealNetworks Public
- * Source License (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the current version of the RealNetworks Community
- * Source License (the "RCSL") available at
- * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
- * will apply. You may also obtain the license terms directly from
- * RealNetworks. You may not use this file except in compliance with
- * the RPSL or, if you have a valid RCSL with RealNetworks applicable
- * to this file, the RCSL. Please see the applicable RPSL or RCSL for
- * the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL") in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your version of
- * this file only under the terms of the GPL, and not to allow others
- * to use your version of this file under the terms of either the RPSL
- * or RCSL, indicate your decision by deleting the provisions above
- * and replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient may
- * use your version of this file under the terms of any one of the
- * RPSL, the RCSL or the GPL.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the
- * portions it created.
- *
- * This file, and the files included with this file, is distributed
- * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
- * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS
- * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET
- * ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #include "chxfmtpparse.h"
- #include "chxcharstack.h"
- #include "hlxclib/string.h"
- #include "hlxclib/stdlib.h"
- #include "hlxclib/errno.h"
- #include "hlxclib/limits.h"
- static const char FMTP_PREFIX[] = "FMTP";
- CHXFMTPParser::CHXFMTPParser(IUnknown* pUnk) :
- m_pCCF(0)
- {
- if (pUnk)
- {
- pUnk->QueryInterface(IID_IHXCommonClassFactory, (void**)&m_pCCF);
- }
- }
- CHXFMTPParser::~CHXFMTPParser()
- {
- HX_RELEASE(m_pCCF);
- }
- HX_RESULT CHXFMTPParser::Parse(const char* pFMTPStr, IHXValues* pHeaders)
- {
- HX_RESULT res = HXR_UNEXPECTED;
- // e.g. a=fmtp:101 emphasis=50/15;foo=bar;flag
-
- if (m_pCCF)
- {
- const char* pCur = pFMTPStr;
-
- // Skip payload type
- //for (;*pCur && (*pCur != ' '); pCur++)
- //;
-
- res = HXR_OK;
-
- IHXBuffer* pFieldName = 0;
- IHXBuffer* pFieldValue = 0;
- UINT32 ulState = 0;
- const char* pDelims = 0;
- while ((HXR_OK == res) && *pCur)
- {
- // Skip whitespace
- for (;*pCur && (*pCur == ' '); pCur++)
- ;
-
- BOOL bCollectValue = FALSE;
- BOOL bAddValue = FALSE;
- IHXBuffer** ppTokDest = 0;
- switch (ulState) {
- case 0:
- pDelims = " ;=";
- if (strchr(pDelims, *pCur))
- {
- pCur++; // Skip delimiter
- }
- else
- {
- ulState = 1;
- bCollectValue = TRUE;
- ppTokDest = &pFieldName;
- }
- break;
- case 1:
- if (*pCur == '=')
- {
- pCur++; // Skip delimiter
- pDelims = " ;";
- ulState = 2;
- }
- else
- {
- bAddValue = TRUE;
- if (strchr(pDelims, *pCur))
- pCur++; // Skip delimiter
- }
- break;
- case 2:
- ppTokDest = &pFieldValue;
- bCollectValue = TRUE;
- ulState = 3;
- break;
- case 3:
- if (*pCur && strchr(pDelims, *pCur))
- pCur++; // Skip delimiter
- bAddValue = TRUE;
- break;
- }
- if (bCollectValue)
- {
- res = CollectToken(pCur, pDelims, ppTokDest, bAddValue);
- }
- if (bAddValue)
- {
- res = AddParam(pFieldName, pFieldValue, pHeaders);
- HX_RELEASE(pFieldName);
- HX_RELEASE(pFieldValue);
- ulState = 0;
- }
- }
-
- if (HXR_OK == res)
- {
- // Add last parameter
- res = AddParam(pFieldName, pFieldValue, pHeaders);
- }
- HX_RELEASE(pFieldName);
- HX_RELEASE(pFieldValue);
- }
- return res;
- }
- HX_RESULT CHXFMTPParser::CollectToken(const char*& pBuf, const char* pDelims,
- IHXBuffer** ppTokDest, BOOL& bAddValue)
- {
- HX_RESULT res = HXR_OK;
- CHXCharStack tok(m_pCCF);
-
- // Collect value
- while((HXR_OK == res) && *pBuf && !strchr(pDelims, *pBuf))
- {
- res = tok.AddChar(*pBuf++);
- }
-
-
- IHXBuffer* pTok = 0;
-
- if ((HXR_OK == res) &&
- (HXR_OK == (res = tok.Finish(pTok))))
- {
- // Make sure we dont have an empty string
- if (pTok->GetSize() > 1)
- {
- *ppTokDest = pTok;
- }
- else
- {
- bAddValue = TRUE;
- HX_RELEASE(pTok);
- }
- }
- return res;
- }
- HX_RESULT CHXFMTPParser::AddParam(IHXBuffer* pFieldName,
- IHXBuffer* pFieldValue,
- IHXValues* pHeaders)
- {
- HX_RESULT res = HXR_OK;
- if (pFieldName)
- {
- IHXBuffer* pParamName = 0;
-
- res = ContructParamName(pFieldName, pParamName);
- if (HXR_OK == res)
- {
- char* pNameStr = (char*)pParamName->GetBuffer();
- if (pFieldValue)
- {
- ULONG32 ulValue;
- if (HXR_OK == ConvertToULONG32(pFieldValue, ulValue))
- {
- // Insert as a numeric field
- res = pHeaders->SetPropertyULONG32(pNameStr, ulValue);
- }
- else
- {
- res = pHeaders->SetPropertyCString(pNameStr, pFieldValue);
- }
- }
- else
- {
- // Assume this is a flag field
- res = pHeaders->SetPropertyULONG32(pNameStr, 1);
- }
- }
- }
- return res;
- }
- HX_RESULT CHXFMTPParser::ContructParamName(IHXBuffer* pFieldName,
- REF(IHXBuffer*) pParamName)
- {
- HX_RESULT res = HXR_UNEXPECTED;
- pParamName = 0;
- ULONG32 ulSize =
- strlen((char*)pFieldName->GetBuffer()) + strlen(FMTP_PREFIX) + 1;
- res = m_pCCF->CreateInstance(IID_IHXBuffer, (void**)&pParamName);
- if ((HXR_OK == res) &&
- (HXR_OK == (res = pParamName->SetSize(ulSize))))
- {
- // Construct parameter name. This will be something
- // like FMTPconfig
- strcpy((char*)pParamName->GetBuffer(), FMTP_PREFIX);
- strcat((char*)pParamName->GetBuffer(), (char*)pFieldName->GetBuffer());
- }
- return res;
- }
- HX_RESULT CHXFMTPParser::ConvertToULONG32(IHXBuffer* pValue,
- REF(ULONG32) ulValue)
- {
- HX_RESULT res = HXR_FAILED;
- char* pValueStr = (char*)pValue->GetBuffer();
- char* pEnd = 0;
- ulValue = ::strtoul(pValueStr, &pEnd, 10);
- if (*pValueStr && (*pEnd == ' ') &&
- ((ulValue != ULONG_MAX) || (errno != ERANGE)))
- {
- res = HXR_OK;
- }
- return res;
- }