126 lines
3.9 KiB
C++
126 lines
3.9 KiB
C++
/*
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*
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* @APPLE_LICENSE_HEADER_START@
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*
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* Copyright (c) 1999-2008 Apple Inc. All Rights Reserved.
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this
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* file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_LICENSE_HEADER_END@
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*
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*/
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/*
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File: StringFormatter.cpp
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Contains: Implementation of StringFormatter class.
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*/
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#include <string.h>
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#include <stdarg.h>
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#include "StringFormatter.h"
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#include "MyAssert.h"
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char* StringFormatter::sEOL = "\r\n";
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UInt32 StringFormatter::sEOLLen = 2;
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void StringFormatter::Put(const SInt32 num)
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{
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char buff[32];
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qtss_sprintf(buff, "%"_S32BITARG_"", num);
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Put(buff);
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}
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void StringFormatter::Put(char* buffer, UInt32 bufferSize)
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{
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//optimization for writing 1 character
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if((bufferSize == 1) && (fCurrentPut != fEndPut)) {
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*(fCurrentPut++) = *buffer;
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fBytesWritten++;
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return;
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}
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//loop until the input buffer size is smaller than the space in the output
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//buffer. Call BufferIsFull at each pass through the loop
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UInt32 spaceLeft = this->GetSpaceLeft();
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UInt32 spaceInBuffer = spaceLeft - 1;
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UInt32 resizedSpaceLeft = 0;
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while ( (spaceInBuffer < bufferSize) || (spaceLeft == 0) ) // too big for destination
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{
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if (spaceLeft > 0)
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{
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//copy as much as possible; truncating the result
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::memcpy(fCurrentPut, buffer, spaceInBuffer);
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fCurrentPut += spaceInBuffer;
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fBytesWritten += spaceInBuffer;
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buffer += spaceInBuffer;
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bufferSize -= spaceInBuffer;
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}
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this->BufferIsFull(fStartPut, this->GetCurrentOffset()); // resize buffer
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resizedSpaceLeft = this->GetSpaceLeft();
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if (spaceLeft == resizedSpaceLeft) // couldn't resize, nothing left to do
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{
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return; // done. There is either nothing to do or nothing we can do because the BufferIsFull
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}
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spaceLeft = resizedSpaceLeft;
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spaceInBuffer = spaceLeft - 1;
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}
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//copy the remaining chunk into the buffer
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::memcpy(fCurrentPut, buffer, bufferSize);
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fCurrentPut += bufferSize;
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fBytesWritten += bufferSize;
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}
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//Puts a printf-style formatted string; except that the NUL terminator is not written. If the buffer is too small, returns false and does not
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//Alter the buffer. Will not count the '\0' terminator as among the bytes written
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Bool16 StringFormatter::PutFmtStr(const char *fmt, ...)
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{
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Assert(fmt != NULL);
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va_list args;
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for(;;)
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{
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va_start(args,fmt);
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int length = ::vsnprintf(fCurrentPut, this->GetSpaceLeft(), fmt, args);
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va_end(args);
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if (length < 0)
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return false;
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if (static_cast<UInt32>(length) >= this->GetSpaceLeft()) //was not able to write all the output
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{
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if (this->BufferIsFull(fStartPut, this->GetCurrentOffset()))
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continue;
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//can only output a portion of the string
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UInt32 bytesWritten = fEndPut - fCurrentPut - 1; //We don't want to include the NUL terminator
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fBytesWritten += bytesWritten;
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fCurrentPut += bytesWritten;
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return false;
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}
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else
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{
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fBytesWritten += length;
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fCurrentPut += length;
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}
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return true;
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}
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}
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