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tdepim/tdeioslave/imap4/mimehdrline.cpp

522 lines
9.5 KiB

/***************************************************************************
mimehdrline.cpp - description
-------------------
begin : Wed Oct 11 2000
copyright : (C) 2000 by Sven Carstens
email : s.carstens@gmx.de
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#include <config.h>
#include <iostream>
#include <ctype.h>
#include <stdlib.h>
#include <stdio.h>
#include "mimehdrline.h"
#include "rfcdecoder.h"
using namespace std;
const char *wdays[] = {
"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
};
const char *months[] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};
mimeHdrLine::mimeHdrLine ():
mimeValue ((const char *) NULL), mimeLabel ((const char *) NULL)
{
}
mimeHdrLine::mimeHdrLine (const TQCString & aLabel, const TQCString & aValue):
mimeValue (aValue),
mimeLabel (aLabel)
{
}
mimeHdrLine::mimeHdrLine (mimeHdrLine * aHdrLine):
mimeValue (aHdrLine->mimeValue), mimeLabel (aHdrLine->mimeLabel)
{
}
mimeHdrLine::~mimeHdrLine ()
{
}
int
mimeHdrLine::appendStr (const char *inCStr)
{
int retVal = 0;
int skip;
char *aCStr = (char *) inCStr;
if (aCStr)
{
skip = skipWS (aCStr);
if (skip && !mimeLabel.isEmpty ())
{
if (skip > 0)
{
mimeValue += TQCString (aCStr, skip + 1);
aCStr += skip;
retVal += skip;
skip = parseFullLine (aCStr);
mimeValue += TQCString (aCStr, skip + 1);
retVal += skip;
aCStr += skip;
}
}
else
{
if (mimeLabel.isEmpty ())
return setStr (aCStr);
}
}
return retVal;
}
/** parse a Line into the class
move input ptr accordingly
and report characters slurped */
int
mimeHdrLine::setStr (const char *inCStr)
{
int retVal = 0;
char *aCStr = (char *) inCStr;
// char *begin = aCStr;
mimeLabel = TQCString ((const char *) NULL);
mimeValue = TQCString ((const char *) NULL);
if (aCStr)
{
// can't have spaces on normal lines
if (!skipWS (aCStr))
{
int label = 0, advance;
while ((advance = parseWord (&aCStr[label])))
{
label += advance;
}
if (label && aCStr[label - 1] != ':')
retVal = 0;
else
{
mimeLabel = TQCString (aCStr, label); //length including zero
retVal += label;
aCStr += label;
}
}
if (retVal)
{
int skip;
skip = skipWS (aCStr);
if (skip < 0)
skip *= -1;
aCStr += skip;
retVal += skip;
skip = parseFullLine (aCStr);
mimeValue = TQCString (aCStr, skip + 1);
retVal += skip;
aCStr += skip;
}
else
{
//Skip malformed line
while (*aCStr && *aCStr != '\r' && *aCStr != '\n')
{
retVal--;
aCStr++;
}
if (*aCStr == '\r')
{
retVal--;
aCStr++;
}
if (*aCStr == '\n')
{
retVal--;
aCStr++;
}
}
}
else
{
//debug
}
return retVal;
}
/** slurp one word*/
int
mimeHdrLine::parseWord (const char *inCStr)
{
int retVal = 0;
char *aCStr = (char *) inCStr;
if (aCStr && *aCStr)
{
if (*aCStr == '"')
return mimeHdrLine::parseQuoted ('"', '"', aCStr);
else
return mimeHdrLine::parseHalfWord (aCStr);
}
else
{
//debug();
}
return retVal;
}
/** slurp one word*/
int
mimeHdrLine::parseQuoted (char startQuote, char endQuote, const char *inCStr)
{
char *aCStr = (char *) inCStr;
int retVal = 0;
if (aCStr && *aCStr)
{
if (*aCStr == startQuote)
{
aCStr++;
retVal++;
}
else
return 0;
while (*aCStr && *aCStr != endQuote)
{
//skip over backticks
if (*aCStr == '\\')
{
aCStr++;
retVal++;
}
//eat this
aCStr++;
retVal++;
}
if (*aCStr == endQuote)
{
aCStr++;
retVal++;
}
}
else
{
//debug();
}
return retVal;
}
/** slurp one alphanumerical word without continuation*/
int
mimeHdrLine::parseAlphaNum (const char *inCStr)
{
int retVal = 0;
char *aCStr = (char *) inCStr;
if (aCStr)
{
while (*aCStr && isalnum (*aCStr))
{
//skip over backticks
if (*aCStr == '\\')
{
aCStr++;
retVal++;
}
//eat this
aCStr++;
retVal++;
}
}
else
{
//debug();
}
return retVal;
}
int
mimeHdrLine::parseHalfWord (const char *inCStr)
{
int retVal = 0;
char *aCStr = (char *) inCStr;
if (aCStr && *aCStr)
{
if (isalnum (*aCStr))
return mimeHdrLine::parseAlphaNum (aCStr);
//skip over backticks
if (*aCStr == '\\')
{
aCStr++;
retVal++;
}
else if (!isspace (*aCStr))
{
//eat this
aCStr++;
retVal++;
}
}
else
{
//debug();
}
return retVal;
}
/** slurp one line without continuation*/
int
mimeHdrLine::parseHalfLine (const char *inCStr)
{
int retVal = 0;
char *aCStr = (char *) inCStr;
if (aCStr)
{
while (*aCStr && *aCStr != '\n')
{
//skip over backticks
if (*aCStr == '\\')
{
aCStr++;
retVal++;
}
//eat this
aCStr++;
retVal++;
}
if (*aCStr == '\n')
{
aCStr++;
retVal++;
}
}
else
{
//debug();
}
return retVal;
}
/** skip all white space characters including continuation*/
int
mimeHdrLine::skipWS (const char *inCStr)
{
int retVal = 0;
char *aCStr = (char *) inCStr;
if (aCStr && *aCStr)
{
while (*aCStr == ' ' || *aCStr == '\t')
{
aCStr++;
retVal++;
}
//check out for continuation lines
if (*aCStr == '\r')
{
aCStr++;
retVal++;
}
if (*aCStr++ == '\n')
if (*aCStr == '\t' || *aCStr == ' ')
{
int skip = mimeHdrLine::skipWS (aCStr);
if (skip < 0)
skip *= -1;
retVal += 1 + skip;
}
else
{
retVal = -retVal - 1;
}
}
else
{
//debug();
}
return retVal;
}
/** parses continuated lines */
int
mimeHdrLine::parseFullLine (const char *inCStr)
{
int retVal = 0;
char *aCStr = (char *) inCStr;
int skip;
if (aCStr)
{
//skip leading white space
skip = skipWS (aCStr);
if (skip > 0)
{
aCStr += skip;
retVal += skip;
}
while (*aCStr)
{
int advance;
if ((advance = parseHalfLine (aCStr)))
{
retVal += advance;
aCStr += advance;
}
else if ((advance = skipWS (aCStr)))
{
if (advance > 0)
{
retVal += advance;
aCStr += advance;
}
else
{
retVal -= advance;
break;
}
}
else
break;
}
}
else
{
//debug();
}
return retVal;
}
/** parses continuated lines */
int
mimeHdrLine::parseSeparator (char separator, const char *inCStr)
{
char *aCStr = (char *) inCStr;
int retVal = 0;
int skip;
if (aCStr)
{
//skip leading white space
skip = skipWS (aCStr);
if (skip > 0)
{
aCStr += skip;
retVal += skip;
}
while (*aCStr)
{
int advance;
if (*aCStr != separator)
{
if ((advance = mimeHdrLine::parseWord (aCStr)))
{
retVal += advance;
aCStr += advance;
}
else if ((advance = mimeHdrLine::skipWS (aCStr)))
{
if (advance > 0)
{
retVal += advance;
aCStr += advance;
}
else
{
retVal -= advance;
break;
}
}
else
break;
}
else
{
//include separator in result
retVal++;
aCStr++;
break;
}
}
}
else
{
//debug();
}
return retVal;
}
/** return the label */
const TQCString&
mimeHdrLine::getLabel ()
{
return mimeLabel;
}
/** return the value */
const TQCString&
mimeHdrLine::getValue ()
{
return mimeValue;
}
// FIXME: very inefficient still
TQCString
mimeHdrLine::truncateLine(TQCString aLine, unsigned int truncate)
{
int cutHere;
TQCString retVal;
uint len = aLine.length();
// see if we have a line of the form "key: value" (like "Subject: bla")
// then we do not want to truncate between key and value
int validStart = aLine.find(": ");
if (validStart > -1) {
validStart += 2;
}
while (len > truncate) {
cutHere = aLine.findRev(' ', truncate);
if (cutHere < 1 || cutHere < validStart) {
cutHere = aLine.findRev('\t', truncate);
if (cutHere < 1) {
cutHere = aLine.find(' ', 1);
if (cutHere < 1) {
cutHere = aLine.find('\t', 1);
if (cutHere < 1) {
// simply truncate
return aLine.left(truncate);
}
}
}
}
retVal += aLine.left(cutHere) + '\n';
int chop = len - cutHere;
aLine = aLine.right(chop);
len -= chop;
}
retVal += aLine;
return retVal;
}