CFStringRef CreateLocalizedStringForParameterValue ( double inParameterValue,
const CAAUParameter * inParameter,
UInt32 inDigits,
UInt32 minDigits) {
if (!inParameter) return nil;
AudioUnitParameterInfo info = inParameter->ParamInfo();
int pow10;
switch (info.unit) {
case kAudioUnitParameterUnit_Hertz:
// number of significant digits based on value
pow10 = int(log10(fmax(inParameterValue, .000001)));
break;
default:
// number of significant digits based on parameter range
pow10 = int(log10(fmax(double(info.maxValue - info.minValue), .000001)));
break;
}
// pow10 range nDigitsAfterDecimal
// -2 .0100-.0999 4
// -1 .100-.999 3
// 0 1.00-9.99 2
// 1 10.0-99.9 1
// 2 100-999 0
// 3 1000-9990 -1
// 4 10000-99900 -2
int nDigitsAfterDecimal = inDigits - (pow10 + 1);
if (nDigitsAfterDecimal < 0)
nDigitsAfterDecimal = 0; // the least number of digits possible is zero
if (info.flags & kAudioUnitParameterFlag_IsHighResolution)
nDigitsAfterDecimal = 4;
CFLocaleRef currentLocale = CFLocaleCopyCurrent();
CFNumberFormatterRef numberFormatter = CFNumberFormatterCreate (NULL, currentLocale, kCFNumberFormatterDecimalStyle);
CFNumberRef maxFractionDigits = CFNumberCreate (NULL, kCFNumberIntType, &nDigitsAfterDecimal);
if (nDigitsAfterDecimal > 0)
nDigitsAfterDecimal = minDigits;
CFNumberRef minFractionDigits = CFNumberCreate (NULL, kCFNumberIntType, &nDigitsAfterDecimal);
CFNumberFormatterSetProperty (numberFormatter, kCFNumberFormatterMinFractionDigits, minFractionDigits);
CFNumberFormatterSetProperty (numberFormatter, kCFNumberFormatterMaxFractionDigits, maxFractionDigits);
CFStringRef formattedNumberString = CFNumberFormatterCreateStringWithValue (NULL, numberFormatter, kCFNumberDoubleType, &inParameterValue);
CFRelease(currentLocale);
CFRelease(numberFormatter);
CFRelease(maxFractionDigits);
CFRelease(minFractionDigits);
return formattedNumberString;
}
CFStringRef getBuffer()
{
kern_return_t kernResult;
bufferStruct myBufStruct;
IOByteCount structSize = sizeof(myBufStruct);
kernResult = IOConnectMethodScalarIStructureO(userClient,
klogKextBuffer,
0, // input count
&structSize,
&myBufStruct);
CFDataRef result = CFDataCreate(kCFAllocatorDefault,myBufStruct.buffer,myBufStruct.bufLen);
CFMutableStringRef decodedData = CFStringCreateMutable(kCFAllocatorDefault,0);
if (!keymap)
return decodedData;
CFDictionaryRef flagsDict = (CFDictionaryRef)CFDictionaryGetValue(keymap,CFSTR("Flags"));
if (!flagsDict)
return decodedData;
CFDictionaryRef ucDict = (CFDictionaryRef)CFDictionaryGetValue(keymap,CFSTR("Uppercase"));
if (!ucDict)
return decodedData;
CFDictionaryRef lcDict = (CFDictionaryRef)CFDictionaryGetValue(keymap,CFSTR("Lowercase"));
if (!lcDict)
return decodedData;
CFNumberFormatterRef myNF = CFNumberFormatterCreate(kCFAllocatorDefault,CFLocaleCopyCurrent(),kCFNumberFormatterNoStyle);
for (int i=0; i<CFDataGetLength(result);i+=2)
{
u_int16_t curChar;
CFDataGetBytes(result,CFRangeMake(i,2),(UInt8*)&curChar);
bool isUpper = false;
if (CFBooleanGetValue(showMods))
{
char flagTmp = (curChar >> 11);
if (flagTmp & 0x01)
CFStringAppend(decodedData,(CFStringRef)CFDictionaryGetValue(flagsDict,CFSTR("0x01")));
if (flagTmp & 0x02)
CFStringAppend(decodedData,(CFStringRef)CFDictionaryGetValue(flagsDict,CFSTR("0x02")));
if (flagTmp & 0x04)
CFStringAppend(decodedData,(CFStringRef)CFDictionaryGetValue(flagsDict,CFSTR("0x04")));
if (flagTmp & 0x08)
CFStringAppend(decodedData,(CFStringRef)CFDictionaryGetValue(flagsDict,CFSTR("0x08")));
if (flagTmp & 0x10)
isUpper = true;
}
curChar &= 0x07ff;
CFStringRef keyChar = CFNumberFormatterCreateStringWithValue(kCFAllocatorDefault,myNF,kCFNumberShortType,&curChar);
CFStringRef text;
if (isUpper)
text = (CFStringRef)CFDictionaryGetValue(ucDict,keyChar);
else
text = (CFStringRef)CFDictionaryGetValue(lcDict,keyChar);
if (text)
{
if (CFStringCompare(text,CFSTR("\\n"),0)==kCFCompareEqualTo)
text = CFSTR("\n");
CFStringAppend(decodedData,text);
}
else
syslog(LOG_ERR,"Unmapped key %d",curChar);
}
return decodedData;
}