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tdepim/mimelib/entity.cpp

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7.9 KiB

//=============================================================================
// File: entity.cpp
// Contents: Definitions for DwEntity
// Maintainer: Doug Sauder <dwsauder@fwb.gulf.net>
// WWW: http://www.fwb.gulf.net/~dwsauder/mimepp.html
//
// Copyright (c) 1996, 1997 Douglas W. Sauder
// All rights reserved.
//
// IN NO EVENT SHALL DOUGLAS W. SAUDER BE LIABLE TO ANY PARTY FOR DIRECT,
// INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF
// THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF DOUGLAS W. SAUDER
// HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// DOUGLAS W. SAUDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT
// NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
// BASIS, AND DOUGLAS W. SAUDER HAS NO OBLIGATION TO PROVIDE MAINTENANCE,
// SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
//
//=============================================================================
#define DW_IMPLEMENTATION
#include <mimelib/config.h>
#include <mimelib/debug.h>
#include <mimelib/string.h>
#include <mimelib/enum.h>
#include <mimelib/entity.h>
#include <mimelib/headers.h>
#include <mimelib/body.h>
#include <mimelib/mediatyp.h>
class DwEntityParser {
friend class DwEntity;
private:
DwEntityParser(const DwString&);
void Parse();
const DwString mString;
DwString mHeaders;
DwString mBody;
};
DwEntityParser::DwEntityParser(const DwString& aStr)
: mString(aStr)
{
Parse();
}
void DwEntityParser::Parse()
{
const char* buf = mString.data();
size_t bufEnd = mString.length();
size_t pos = 0;
size_t headersStart = 0;
size_t headersLength = 0;
size_t lineStart = pos;
DwBool isHeaderLine = DwFalse;
// If first character is a LF (ANSI C or UNIX)
// or if first two characters are CR LF (MIME or DOS),
// there are no headers.
if (pos < bufEnd && buf[pos] != '\n'
&& ! (buf[pos] == '\r' && pos+1 < bufEnd && buf[pos+1] == '\n')) {
while (pos < bufEnd) {
// End of line marked by LF
if (buf[pos] == '\n') {
++pos;
if (!isHeaderLine) {
pos = lineStart;
break;
}
// Check for LF LF
else if (pos < bufEnd && buf[pos] == '\n') {
break;
}
lineStart = pos;
isHeaderLine = DwFalse;
}
// End of line marked by CRLF
else if (buf[pos] == '\r' && pos+1 < bufEnd
&& buf[pos+1] == '\n') {
pos += 2;
if (!isHeaderLine) {
pos = lineStart;
break;
}
// Check for CR LF CR LF
else if (pos+1 < bufEnd && buf[pos] == '\r'
&& buf[pos+1] == '\n') {
break;
}
lineStart = pos;
isHeaderLine = DwFalse;
}
else if (buf[pos] == ':') {
isHeaderLine = DwTrue;
++pos;
}
else if (pos == lineStart &&
(buf[pos] == ' ' || buf[pos] == '\t')) {
isHeaderLine = DwTrue;
++pos;
}
else {
++pos;
}
}
}
headersLength = pos;
mHeaders = mString.substr(headersStart, headersLength);
// Skip blank line
// LF (ANSI C or UNIX)
if (pos < bufEnd && buf[pos] == '\n') {
++pos;
}
// CR LF (MIME or DOS)
else if (pos < bufEnd && buf[pos] == '\r'
&& pos+1 < bufEnd && buf[pos+1] == '\n') {
pos += 2;
}
size_t bodyStart = pos;
size_t bodyLength = mString.length() - bodyStart;
mBody = mString.substr(bodyStart, bodyLength);
}
//==========================================================================
const char* const DwEntity::sClassName = "DwEntity";
DwEntity::DwEntity()
{
mHeaders = DwHeaders::NewHeaders("", this);
ASSERT(mHeaders != 0);
mBody = DwBody::NewBody("", this);
ASSERT(mBody != 0);
mClassId = kCidEntity;
mClassName = sClassName;
mBodySize = -1;
}
DwEntity::DwEntity(const DwEntity& aEntity)
: DwMessageComponent(aEntity)
{
mHeaders = (DwHeaders*) aEntity.mHeaders->Clone();
ASSERT(mHeaders != 0);
mHeaders->SetParent(this);
mBody = (DwBody*) aEntity.mBody->Clone();
ASSERT(mBody != 0);
mBody->SetParent(this);
mClassId = kCidEntity;
mClassName = sClassName;
mBodySize = aEntity.mBodySize;
}
DwEntity::DwEntity(const DwString& aStr, DwMessageComponent* aParent)
: DwMessageComponent(aStr, aParent)
{
mHeaders = DwHeaders::NewHeaders("", this);
ASSERT(mHeaders != 0);
mBody = DwBody::NewBody("", this);
ASSERT(mBody != 0);
mClassId = kCidEntity;
mClassName = sClassName;
mBodySize = -1;
}
DwEntity::~DwEntity()
{
delete mHeaders;
delete mBody;
}
const DwEntity& DwEntity::operator = (const DwEntity& aEntity)
{
if (this == &aEntity) return *this;
DwMessageComponent::operator = (aEntity);
// Note: Because of the derived assignment problem, we cannot use the
// assignment operator for DwHeaders and DwBody in the following.
delete mHeaders;
mHeaders = (DwHeaders*) aEntity.mHeaders->Clone();
ASSERT(mHeaders != 0);
mHeaders->SetParent(this);
delete mBody;
mBody = (DwBody*) aEntity.mBody->Clone();
ASSERT(mBody != 0);
mBody->SetParent(this);
if (mParent) {
mParent->SetModified();
}
return *this;
}
void DwEntity::Parse()
{
mIsModified = 0;
DwEntityParser parser(mString);
mHeaders->FromString(parser.mHeaders);
mHeaders->Parse();
mBody->FromString(parser.mBody);
mBody->Parse();
}
void DwEntity::Assemble(DwHeaders& aHeaders, DwBody& aBody)
{
mString = "";
mString += aHeaders.AsString();
// DwEntityParser skips the line separating the headers from the
// body. So it's neither part of DwHeaders, nor of DwBody
// -> we need to readd it here:
mString += DW_EOL;
mString += aBody.AsString();
mIsModified = 0;
}
void DwEntity::Assemble()
{
if (!mIsModified) return;
mBody->Assemble();
mHeaders->Assemble();
Assemble( *mHeaders, *mBody );
}
DwHeaders& DwEntity::Headers() const
{
ASSERT(mHeaders != 0);
return *mHeaders;
}
DwBody& DwEntity::Body() const
{
return *mBody;
}
int DwEntity::BodySize() const
{
if ( mBody->AsString().length() > 0 )
return mBody->AsString().length();
else if ( mBodySize > 0 )
return mBodySize;
else
return 0;
}
#if defined(DW_DEBUG_VERSION)
void DwEntity::PrintDebugInfo(std::ostream& aStrm, int aDepth) const
{
aStrm << "------------ Debug info for DwEntity class ------------\n";
_PrintDebugInfo(aStrm);
int depth = aDepth - 1;
depth = (depth >= 0) ? depth : 0;
if (aDepth == 0 || depth > 0) {
mHeaders->PrintDebugInfo(aStrm, depth);
mBody->PrintDebugInfo(aStrm, depth);
}
}
#else
void DwEntity::PrintDebugInfo(std::ostream& , int ) const {}
#endif // defined(DW_DEBUG_VERSION)
#if defined(DW_DEBUG_VERSION)
void DwEntity::_PrintDebugInfo(std::ostream& aStrm) const
{
DwMessageComponent::_PrintDebugInfo(aStrm);
aStrm << "Headers: " << mHeaders->ObjectId() << '\n';
aStrm << "Body: " << mBody->ObjectId() << '\n';
}
#else
void DwEntity::_PrintDebugInfo(std::ostream& ) const {}
#endif // defined(DW_DEBUG_VERSION)
void DwEntity::CheckInvariants() const
{
#if defined(DW_DEBUG_VERSION)
DwMessageComponent::CheckInvariants();
mHeaders->CheckInvariants();
assert((DwMessageComponent*) this == mHeaders->Parent());
mBody->CheckInvariants();
assert((DwMessageComponent*) this == mBody->Parent());
#endif // defined(DW_DEBUG_VERSION)
}