nuclear@0: /************************************************************************************
nuclear@0: 
nuclear@0: Filename    :   OVR_String_FormatUtil.cpp
nuclear@0: Content     :   String format functions.
nuclear@0: Created     :   February 27, 2013
nuclear@0: Notes       : 
nuclear@0: 
nuclear@0: Copyright   :   Copyright 2014 Oculus VR, LLC All Rights reserved.
nuclear@0: 
nuclear@0: Licensed under the Oculus VR Rift SDK License Version 3.2 (the "License"); 
nuclear@0: you may not use the Oculus VR Rift SDK except in compliance with the License, 
nuclear@0: which is provided at the time of installation or download, or which 
nuclear@0: otherwise accompanies this software in either electronic or hard copy form.
nuclear@0: 
nuclear@0: You may obtain a copy of the License at
nuclear@0: 
nuclear@0: http://www.oculusvr.com/licenses/LICENSE-3.2 
nuclear@0: 
nuclear@0: Unless required by applicable law or agreed to in writing, the Oculus VR SDK 
nuclear@0: distributed under the License is distributed on an "AS IS" BASIS,
nuclear@0: WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
nuclear@0: See the License for the specific language governing permissions and
nuclear@0: limitations under the License.
nuclear@0: 
nuclear@0: ************************************************************************************/
nuclear@0: 
nuclear@0: #include "OVR_String.h"
nuclear@0: #include "OVR_Log.h"
nuclear@0: 
nuclear@0: namespace OVR {
nuclear@0: 
nuclear@0: void StringBuffer::AppendFormat(const char* format, ...)
nuclear@0: {       
nuclear@0:     va_list argList;
nuclear@0:     char    buffer[512];
nuclear@0:     char*   bufferUsed = buffer;
nuclear@0:     char*   bufferAllocated = NULL;
nuclear@0: 
nuclear@0:     va_start(argList, format);
nuclear@0: 
nuclear@0:     #if !defined(OVR_CC_MSVC) // Non-Microsoft compilers require you to save a copy of the va_list.
nuclear@0:         va_list argListSaved;
nuclear@0:         va_copy(argListSaved, argList);
nuclear@0:     #endif
nuclear@0: 
nuclear@0:     int requiredStrlen = OVR_vsnprintf(bufferUsed, OVR_ARRAY_COUNT(buffer), format, argList); // The large majority of the time this will succeed.
nuclear@0: 
nuclear@0:     if(requiredStrlen >= (int)sizeof(buffer)) // If the initial capacity wasn't enough...
nuclear@0:     {
nuclear@0:         bufferAllocated = (char*)OVR_ALLOC(sizeof(char) * (requiredStrlen + 1));
nuclear@0:         bufferUsed = bufferAllocated;
nuclear@0:         if(bufferAllocated)
nuclear@0:         {
nuclear@0:             #if !defined(OVR_CC_MSVC)
nuclear@0:                 va_end(argList);
nuclear@0:                 va_copy(argList, argListSaved);
nuclear@0:             #endif
nuclear@0:             requiredStrlen = OVR_vsnprintf(bufferAllocated, (requiredStrlen + 1), format, argList);
nuclear@0:         }
nuclear@0:     }
nuclear@0: 
nuclear@0:     if(requiredStrlen < 0) // If there was a printf format error...
nuclear@0:     {
nuclear@0:         bufferUsed = NULL;
nuclear@0:     }
nuclear@0: 
nuclear@0:     va_end(argList);
nuclear@0: 
nuclear@0:     if(bufferUsed)
nuclear@0:         AppendString(bufferUsed);
nuclear@0: 
nuclear@0:     if(bufferAllocated)
nuclear@0:         OVR_FREE(bufferAllocated);
nuclear@0: }
nuclear@0: 
nuclear@0: } // OVR