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Add StringBeginsWith, StringEndsWith, and UTF8ToNewUnicode. Move UTF8 handling utilities to separate file. b=131293 r=jst sr=alecf,jag a=asa b=131293

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git-svn-id: svn://10.0.0.236/trunk@142727 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
dbaron%dbaron.org
2003-05-21 22:20:27 +00:00
parent 3a4158511c
commit 1b8f7f8cfb
13 changed files with 679 additions and 408 deletions
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56
mozilla/string/obsolete/nsString2.cpp
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@@ -44,6 +44,7 @@
#include "nsString.h"
#include "nsReadableUtils.h"
#include "nsDebug.h"
#include "nsUTF8Utils.h"
#ifndef nsCharTraits_h___
#include "nsCharTraits.h"
@@ -1348,61 +1349,6 @@ NS_ConvertASCIItoUCS2::NS_ConvertASCIItoUCS2( const nsACString& aCString )
}
}
class CalculateUTF8Length
{
public:
typedef nsACString::char_type value_type;
CalculateUTF8Length() : mLength(0), mErrorEncountered(PR_FALSE) { }
size_t Length() const { return mLength; }
PRUint32 write( const value_type* start, PRUint32 N )
{
// ignore any further requests
if ( mErrorEncountered )
return N;
// algorithm assumes utf8 units won't
// be spread across fragments
const value_type* p = start;
const value_type* end = start + N;
for ( ; p < end /* && *p */; ++mLength )
{
if ( UTF8traits::isASCII(*p) )
p += 1;
else if ( UTF8traits::is2byte(*p) )
p += 2;
else if ( UTF8traits::is3byte(*p) )
p += 3;
else if ( UTF8traits::is4byte(*p) ) {
p += 4;
++mLength;
}
else if ( UTF8traits::is5byte(*p) )
p += 5;
else if ( UTF8traits::is6byte(*p) )
p += 6;
else
{
break;
}
}
if ( p != end )
{
NS_ERROR("Not a UTF-8 string. This code should only be used for converting from known UTF-8 strings.");
mErrorEncountered = PR_TRUE;
mLength = 0;
return N;
}
return p - start;
}
private:
size_t mLength;
PRBool mErrorEncountered;
};
void
NS_ConvertUTF8toUCS2::Init( const nsACString& aCString )
{