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landing string defragmentation patch for bug 231995, r/sr=dbaron,jst,dougt

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git-svn-id: svn://10.0.0.236/trunk@152905 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
darin%meer.net
2004-02-19 02:44:03 +00:00
parent a63ea3848d
commit 55688e6410
223 changed files with 12792 additions and 16860 deletions
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73
mozilla/xpcom/string/src/nsPrintfCString.cpp
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@@ -1,4 +1,5 @@
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
@@ -40,75 +41,43 @@
#include "prprf.h"
// though these classes define a fixed buffer, they do not set the F_FIXED
// flag. this is because they are not intended to be modified after they have
// been constructed. we could change this but it would require adding a new
// class to the hierarchy, one that both this class and nsCAutoString would
// inherit from. for now, we populate the fixed buffer, and then let the
// nsCString code treat the buffer as if it were a dependent buffer.
nsPrintfCString::nsPrintfCString( const char_type* format, ... )
: mStart(mLocalBuffer),
mLength(0)
: string_type(mLocalBuffer, 0, F_TERMINATED)
{
va_list ap;
size_t logical_capacity = kLocalBufferSize;
size_t physical_capacity = logical_capacity + 1;
size_type logical_capacity = kLocalBufferSize;
size_type physical_capacity = logical_capacity + 1;
va_start(ap, format);
mLength = PR_vsnprintf(mStart, physical_capacity, format, ap);
mLength = PR_vsnprintf(mData, physical_capacity, format, ap);
va_end(ap);
}
nsPrintfCString::nsPrintfCString( size_t n, const char_type* format, ... )
: mStart(mLocalBuffer),
mLength(0)
nsPrintfCString::nsPrintfCString( size_type n, const char_type* format, ... )
: string_type(mLocalBuffer, 0, F_TERMINATED)
{
va_list ap;
// make sure there's at least |n| space
size_t logical_capacity = kLocalBufferSize;
size_type logical_capacity = kLocalBufferSize;
if ( n > logical_capacity )
{
char_type* nonlocal_buffer = new char_type[n];
// if we got something, use it
if ( nonlocal_buffer )
{
mStart = nonlocal_buffer;
logical_capacity = n;
}
// else, it's the error case ... we'll use what space we have
// (since we can't throw)
SetCapacity(n);
if (Capacity() < n)
return; // out of memory !!
logical_capacity = n;
}
size_t physical_capacity = logical_capacity + 1;
size_type physical_capacity = logical_capacity + 1;
va_start(ap, format);
mLength = PR_vsnprintf(mStart, physical_capacity, format, ap);
mLength = PR_vsnprintf(mData, physical_capacity, format, ap);
va_end(ap);
}
nsPrintfCString::~nsPrintfCString()
{
if ( mStart != mLocalBuffer )
delete [] mStart;
}
PRUint32
nsPrintfCString::Length() const
{
return mLength;
}
const nsPrintfCString::char_type*
nsPrintfCString::GetReadableFragment( const_fragment_type& aFragment, nsFragmentRequest aRequest, PRUint32 aOffset ) const
{
switch ( aRequest )
{
case kFirstFragment:
case kLastFragment:
case kFragmentAt:
aFragment.mEnd = (aFragment.mStart = mStart) + mLength;
return mStart + aOffset;
case kPrevFragment:
case kNextFragment:
default:
return 0;
}
}