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      1 /*
      2  * Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved.
      3  *
      4  * This library is free software; you can redistribute it and/or
      5  * modify it under the terms of the GNU Library General Public
      6  * License as published by the Free Software Foundation; either
      7  * version 2 of the License, or (at your option) any later version.
      8  *
      9  * This library is distributed in the hope that it will be useful,
     10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  * Library General Public License for more details.
     13  *
     14  * You should have received a copy of the GNU Library General Public License
     15  * along with this library; see the file COPYING.LIB.  If not, write to
     16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     17  * Boston, MA 02110-1301, USA.
     18  *
     19  */
     20 
     21 #include "config.h"
     22 #include "FormDataList.h"
     23 
     24 namespace WebCore {
     25 
     26 FormDataList::FormDataList(const TextEncoding& c)
     27     : m_encoding(c)
     28 {
     29 }
     30 
     31 void FormDataList::appendString(const CString& s)
     32 {
     33     m_list.append(s);
     34 }
     35 
     36 // Change plain CR and plain LF to CRLF pairs.
     37 static CString fixLineBreaks(const CString& s)
     38 {
     39     // Compute the length.
     40     unsigned newLen = 0;
     41     const char* p = s.data();
     42     while (char c = *p++) {
     43         if (c == '\r') {
     44             // Safe to look ahead because of trailing '\0'.
     45             if (*p != '\n') {
     46                 // Turn CR into CRLF.
     47                 newLen += 2;
     48             }
     49         } else if (c == '\n') {
     50             // Turn LF into CRLF.
     51             newLen += 2;
     52         } else {
     53             // Leave other characters alone.
     54             newLen += 1;
     55         }
     56     }
     57     if (newLen == s.length()) {
     58         return s;
     59     }
     60 
     61     // Make a copy of the string.
     62     p = s.data();
     63     char* q;
     64     CString result = CString::newUninitialized(newLen, q);
     65     while (char c = *p++) {
     66         if (c == '\r') {
     67             // Safe to look ahead because of trailing '\0'.
     68             if (*p != '\n') {
     69                 // Turn CR into CRLF.
     70                 *q++ = '\r';
     71                 *q++ = '\n';
     72             }
     73         } else if (c == '\n') {
     74             // Turn LF into CRLF.
     75             *q++ = '\r';
     76             *q++ = '\n';
     77         } else {
     78             // Leave other characters alone.
     79             *q++ = c;
     80         }
     81     }
     82     return result;
     83 }
     84 
     85 void FormDataList::appendString(const String& s)
     86 {
     87     CString cstr = fixLineBreaks(m_encoding.encode(s.characters(), s.length(), EntitiesForUnencodables));
     88     m_list.append(cstr);
     89 }
     90 
     91 } // namespace
     92