The Tor Browser: xpcom/string/src/nsTStringObsolete.cpp@b8a032363ba2 (annotated)

xpcom/string/src/nsTStringObsolete.cpp@b8a032363ba2 (annotated)

xpcom/string/src/nsTStringObsolete.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim:set ts=2 sw=2 sts=2 et cindent: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   /**
    * nsTString::Find
    *
    * aOffset specifies starting index
    * aCount specifies number of string compares (iterations)
    */
 int32_t
 nsTString_CharT::Find( const nsCString& aString, bool aIgnoreCase, int32_t aOffset, int32_t aCount) const
   {
     // this method changes the meaning of aOffset and aCount:
     Find_ComputeSearchRange(mLength, aString.Length(), aOffset, aCount);
     int32_t result = FindSubstring(mData + aOffset, aCount, aString.get(), aString.Length(), aIgnoreCase);
     if (result != kNotFound)
       result += aOffset;
     return result;
   }
 int32_t
 nsTString_CharT::Find( const char* aString, bool aIgnoreCase, int32_t aOffset, int32_t aCount) const
   {
     return Find(nsDependentCString(aString), aIgnoreCase, aOffset, aCount);
   }
   /**
    * nsTString::RFind
    *
    * aOffset specifies starting index
    * aCount specifies number of string compares (iterations)
    */
 int32_t
 nsTString_CharT::RFind( const nsCString& aString, bool aIgnoreCase, int32_t aOffset, int32_t aCount) const
   {
     // this method changes the meaning of aOffset and aCount:
     RFind_ComputeSearchRange(mLength, aString.Length(), aOffset, aCount);
     int32_t result = RFindSubstring(mData + aOffset, aCount, aString.get(), aString.Length(), aIgnoreCase);
     if (result != kNotFound)
       result += aOffset;
     return result;
   }
 int32_t
 nsTString_CharT::RFind( const char* aString, bool aIgnoreCase, int32_t aOffset, int32_t aCount) const
   {
     return RFind(nsDependentCString(aString), aIgnoreCase, aOffset, aCount);
   }
   /**
    * nsTString::RFindChar
    */
 int32_t
 nsTString_CharT::RFindChar( char16_t aChar, int32_t aOffset, int32_t aCount) const
   {
     return nsBufferRoutines<CharT>::rfind_char(mData, mLength, aOffset, aChar, aCount);
   }
   /**
    * nsTString::FindCharInSet
    */
 int32_t
 nsTString_CharT::FindCharInSet( const char* aSet, int32_t aOffset ) const
   {
     if (aOffset < 0)
       aOffset = 0;
     else if (aOffset >= int32_t(mLength))
       return kNotFound;
     int32_t result = ::FindCharInSet(mData + aOffset, mLength - aOffset, aSet);
     if (result != kNotFound)
       result += aOffset;
     return result;
   }
   /**
    * nsTString::RFindCharInSet
    */
 int32_t
 nsTString_CharT::RFindCharInSet( const CharT* aSet, int32_t aOffset ) const
   {
     // We want to pass a "data length" to ::RFindCharInSet
     if (aOffset < 0 || aOffset > int32_t(mLength))
       aOffset = mLength;
     else
       ++aOffset;
     return ::RFindCharInSet(mData, aOffset, aSet);
   }
   // it's a shame to replicate this code.  it was done this way in the past
   // to help performance.  this function also gets to keep the rickg style
   // indentation :-/
 int32_t
 nsTString_CharT::ToInteger( nsresult* aErrorCode, uint32_t aRadix ) const
 {
   CharT*  cp=mData;
   int32_t theRadix=10; // base 10 unless base 16 detected, or overriden (aRadix != kAutoDetect)
   int32_t result=0;
   bool    negate=false;
   CharT   theChar=0;
     //initial value, override if we find an integer
   *aErrorCode=NS_ERROR_ILLEGAL_VALUE;
   if(cp) {
     //begin by skipping over leading chars that shouldn't be part of the number...
     CharT*  endcp=cp+mLength;
     bool    done=false;
     while((cp<endcp) && (!done)){
       switch(*cp++) {
         case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
         case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
           theRadix=16;
           done=true;
           break;
         case '0': case '1': case '2': case '3': case '4':
         case '5': case '6': case '7': case '8': case '9':
           done=true;
           break;
         case '-':
           negate=true; //fall through...
           break;
         case 'X': case 'x':
           theRadix=16;
           break;
         default:
           break;
       } //switch
     }
     if (done) {
         //integer found
       *aErrorCode = NS_OK;
       if (aRadix!=kAutoDetect) theRadix = aRadix; // override
         //now iterate the numeric chars and build our result
       CharT* first=--cp;  //in case we have to back up.
       bool haveValue = false;
       while(cp<endcp){
         int32_t oldresult = result;
         theChar=*cp++;
         if(('0'<=theChar) && (theChar<='9')){
           result = (theRadix * result) + (theChar-'0');
           haveValue = true;
         }
         else if((theChar>='A') && (theChar<='F')) {
           if(10==theRadix) {
             if(kAutoDetect==aRadix){
               theRadix=16;
               cp=first; //backup
               result=0;
               haveValue = false;
             }
             else {
               *aErrorCode=NS_ERROR_ILLEGAL_VALUE;
               result=0;
               break;
             }
           }
           else {
             result = (theRadix * result) + ((theChar-'A')+10);
             haveValue = true;
           }
         }
         else if((theChar>='a') && (theChar<='f')) {
           if(10==theRadix) {
             if(kAutoDetect==aRadix){
               theRadix=16;
               cp=first; //backup
               result=0;
               haveValue = false;
             }
             else {
               *aErrorCode=NS_ERROR_ILLEGAL_VALUE;
               result=0;
               break;
             }
           }
           else {
             result = (theRadix * result) + ((theChar-'a')+10);
             haveValue = true;
           }
         }
         else if((('X'==theChar) || ('x'==theChar)) && (!haveValue || result == 0)) {
           continue;
         }
         else if((('#'==theChar) || ('+'==theChar)) && !haveValue) {
           continue;
         }
         else {
           //we've encountered a char that's not a legal number or sign
           break;
         }
         if (result < oldresult) {
           // overflow!
           *aErrorCode = NS_ERROR_ILLEGAL_VALUE;
           result = 0;
           break;
         }
       } //while
       if(negate)
         result=-result;
     } //if
   }
   return result;
 }
   /**
    * nsTString::ToInteger64
    */
 int64_t
 nsTString_CharT::ToInteger64( nsresult* aErrorCode, uint32_t aRadix ) const
 {
   CharT*  cp=mData;
   int32_t theRadix=10; // base 10 unless base 16 detected, or overriden (aRadix != kAutoDetect)
   int64_t result=0;
   bool    negate=false;
   CharT   theChar=0;
     //initial value, override if we find an integer
   *aErrorCode=NS_ERROR_ILLEGAL_VALUE;
   if(cp) {
     //begin by skipping over leading chars that shouldn't be part of the number...
     CharT*  endcp=cp+mLength;
     bool    done=false;
     while((cp<endcp) && (!done)){
       switch(*cp++) {
         case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
         case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
           theRadix=16;
           done=true;
           break;
         case '0': case '1': case '2': case '3': case '4':
         case '5': case '6': case '7': case '8': case '9':
           done=true;
           break;
         case '-':
           negate=true; //fall through...
           break;
         case 'X': case 'x':
           theRadix=16;
           break;
         default:
           break;
       } //switch
     }
     if (done) {
         //integer found
       *aErrorCode = NS_OK;
       if (aRadix!=kAutoDetect) theRadix = aRadix; // override
         //now iterate the numeric chars and build our result
       CharT* first=--cp;  //in case we have to back up.
       bool haveValue = false;
       while(cp<endcp){
         int64_t oldresult = result;
         theChar=*cp++;
         if(('0'<=theChar) && (theChar<='9')){
           result = (theRadix * result) + (theChar-'0');
           haveValue = true;
         }
         else if((theChar>='A') && (theChar<='F')) {
           if(10==theRadix) {
             if(kAutoDetect==aRadix){
               theRadix=16;
               cp=first; //backup
               result=0;
               haveValue = false;
             }
             else {
               *aErrorCode=NS_ERROR_ILLEGAL_VALUE;
               result=0;
               break;
             }
           }
           else {
             result = (theRadix * result) + ((theChar-'A')+10);
             haveValue = true;
           }
         }
         else if((theChar>='a') && (theChar<='f')) {
           if(10==theRadix) {
             if(kAutoDetect==aRadix){
               theRadix=16;
               cp=first; //backup
               result=0;
               haveValue = false;
             }
             else {
               *aErrorCode=NS_ERROR_ILLEGAL_VALUE;
               result=0;
               break;
             }
           }
           else {
             result = (theRadix * result) + ((theChar-'a')+10);
             haveValue = true;
           }
         }
         else if((('X'==theChar) || ('x'==theChar)) && (!haveValue || result == 0)) {
           continue;
         }
         else if((('#'==theChar) || ('+'==theChar)) && !haveValue) {
           continue;
         }
         else {
           //we've encountered a char that's not a legal number or sign
           break;
         }
         if (result < oldresult) {
           // overflow!
           *aErrorCode = NS_ERROR_ILLEGAL_VALUE;
           result = 0;
           break;
         }
       } //while
       if(negate)
         result=-result;
     } //if
   }
   return result;
 }
 /**
    * nsTString::Mid
    */
 uint32_t
 nsTString_CharT::Mid( self_type& aResult, index_type aStartPos, size_type aLengthToCopy ) const
   {
     if (aStartPos == 0 && aLengthToCopy >= mLength)
       aResult = *this;
     else
       aResult = Substring(*this, aStartPos, aLengthToCopy);
     return aResult.mLength;
   }
   /**
    * nsTString::SetCharAt
    */
 bool
 nsTString_CharT::SetCharAt( char16_t aChar, uint32_t aIndex )
   {
     if (aIndex >= mLength)
       return false;
     if (!EnsureMutable())
       NS_ABORT_OOM(mLength);
     mData[aIndex] = CharT(aChar);
     return true;
   }
   /**
    * nsTString::StripChars,StripChar,StripWhitespace
    */
 void
 nsTString_CharT::StripChars( const char* aSet )
   {
     if (!EnsureMutable())
       NS_ABORT_OOM(mLength);
     mLength = nsBufferRoutines<CharT>::strip_chars(mData, mLength, aSet);
   }
 void
 nsTString_CharT::StripWhitespace()
   {
     StripChars(kWhitespace);
   }
   /**
    * nsTString::ReplaceChar,ReplaceSubstring
    */
 void
 nsTString_CharT::ReplaceChar( char_type aOldChar, char_type aNewChar )
   {
     if (!EnsureMutable()) // XXX do this lazily?
       NS_ABORT_OOM(mLength);
     for (uint32_t i=0; i<mLength; ++i)
       {
         if (mData[i] == aOldChar)
           mData[i] = aNewChar;
       }
   }
 void
 nsTString_CharT::ReplaceChar( const char* aSet, char_type aNewChar )
   {
     if (!EnsureMutable()) // XXX do this lazily?
       NS_ABORT_OOM(mLength);
     char_type* data = mData;
     uint32_t lenRemaining = mLength;
     while (lenRemaining)
       {
         int32_t i = ::FindCharInSet(data, lenRemaining, aSet);
         if (i == kNotFound)
           break;
         data[i++] = aNewChar;
         data += i;
         lenRemaining -= i;
       }
   }
 void
 nsTString_CharT::ReplaceSubstring( const char_type* aTarget, const char_type* aNewValue )
   {
     ReplaceSubstring(nsTDependentString_CharT(aTarget),
                      nsTDependentString_CharT(aNewValue));
   }
 void
 nsTString_CharT::ReplaceSubstring( const self_type& aTarget, const self_type& aNewValue )
   {
     if (aTarget.Length() == 0)
       return;
     uint32_t i = 0;
     while (i < mLength)
       {
         int32_t r = FindSubstring(mData + i, mLength - i, static_cast<const char_type*>(aTarget.Data()), aTarget.Length(), false);
         if (r == kNotFound)
           break;
         Replace(i + r, aTarget.Length(), aNewValue);
         i += r + aNewValue.Length();
       }
   }
   /**
    * nsTString::Trim
    */
 void
 nsTString_CharT::Trim( const char* aSet, bool aTrimLeading, bool aTrimTrailing, bool aIgnoreQuotes )
   {
       // the old implementation worried about aSet being null :-/
     if (!aSet)
       return;
     char_type* start = mData;
     char_type* end   = mData + mLength;
       // skip over quotes if requested
     if (aIgnoreQuotes && mLength > 2 && mData[0] == mData[mLength - 1] &&
           (mData[0] == '\'' || mData[0] == '"'))
       {
         ++start;
         --end;
       }
     uint32_t setLen = nsCharTraits<char>::length(aSet);
     if (aTrimLeading)
       {
         uint32_t cutStart = start - mData;
         uint32_t cutLength = 0;
           // walk forward from start to end
         for (; start != end; ++start, ++cutLength)
           {
             int32_t pos = FindChar1(aSet, setLen, 0, *start, setLen);
             if (pos == kNotFound)
               break;
           }
         if (cutLength)
           {
             Cut(cutStart, cutLength);
               // reset iterators
             start = mData + cutStart;
             end   = mData + mLength - cutStart;
           }
       }
     if (aTrimTrailing)
       {
         uint32_t cutEnd = end - mData;
         uint32_t cutLength = 0;
           // walk backward from end to start
         --end;
         for (; end >= start; --end, ++cutLength)
           {
             int32_t pos = FindChar1(aSet, setLen, 0, *end, setLen);
             if (pos == kNotFound)
               break;
           }
         if (cutLength)
           Cut(cutEnd - cutLength, cutLength);
       }
   }
   /**
    * nsTString::CompressWhitespace
    */
 void
 nsTString_CharT::CompressWhitespace( bool aTrimLeading, bool aTrimTrailing )
   {
     const char* set = kWhitespace;
     ReplaceChar(set, ' ');
     Trim(set, aTrimLeading, aTrimTrailing);
       // this one does some questionable fu... just copying the old code!
     mLength = nsBufferRoutines<char_type>::compress_chars(mData, mLength, set);
   }
   /**
    * nsTString::AssignWithConversion
    */
 void
 nsTString_CharT::AssignWithConversion( const incompatible_char_type* aData, int32_t aLength )
   {
       // for compatibility with the old string implementation, we need to allow
       // for a nullptr input buffer :-(
     if (!aData)
       {
         Truncate();
       }
     else
       {
         if (aLength < 0)
           aLength = nsCharTraits<incompatible_char_type>::length(aData);
         AssignWithConversion(Substring(aData, aLength));
       }
   }

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xpcom/string/src/nsTStringObsolete.cpp@b8a032363ba2 (annotated)

xpcom/string/src/nsTStringObsolete.cpp