//
// re-calculate frequency response
//
void Plot::setDamp( double damping )
{
const bool doReplot = autoReplot();
setAutoReplot( false );
const int ArraySize = 200;
double frequency[ArraySize];
double amplitude[ArraySize];
double phase[ArraySize];
// build frequency vector with logarithmic division
logSpace( frequency, ArraySize, 0.01, 100 );
int i3 = 1;
double fmax = 1;
double amax = -1000.0;
for ( int i = 0; i < ArraySize; i++ )
{
double f = frequency[i];
const ComplexNumber g =
ComplexNumber( 1.0 ) / ComplexNumber( 1.0 - f * f, 2.0 * damping * f );
amplitude[i] = 20.0 * log10( qSqrt( g.real() * g.real() + g.imag() * g.imag() ) );
phase[i] = qAtan2( g.imag(), g.real() ) * ( 180.0 / M_PI );
if ( ( i3 <= 1 ) && ( amplitude[i] < -3.0 ) )
i3 = i;
if ( amplitude[i] > amax )
{
amax = amplitude[i];
fmax = frequency[i];
}
}
double f3 = frequency[i3] - ( frequency[i3] - frequency[i3 - 1] )
/ ( amplitude[i3] - amplitude[i3 -1] ) * ( amplitude[i3] + 3 );
showPeak( fmax, amax );
show3dB( f3 );
showData( frequency, amplitude, phase, ArraySize );
setAutoReplot( doReplot );
replot();
}
void testSymbol()
{
bool res = true;
int i, j;
int countDups;
const OSSymbol *cache[numStrCache];
void *spaceCheck;
// very first test initialises the OSMetaClass cache.
cache[0] = IOSymbol::withCStringNoCopy(testC00);
TEST_ASSERT('u', "0a", cache[0]);
if (cache[0])
cache[0]->release();
spaceCheck = checkPointSpace();
// Setup the symbol cache, make sure it grows the symbol unique'ing
// hash table. Also determine that the symbol is created ok and that
// it is indeed equal to the creating cString by strcmp.
for (i = 0; i < numStrCache; i++) {
cache[i] = OSSymbol::withCStringNoCopy(strCache[i]);
if (!cache[i]) {
verPrintf(("testSymbol(u) test 1a%d failed\n", i)); res = false;
}
else if (!cache[i]->isEqualTo(strCache[i])) {
verPrintf(("testSymbol(u) test 1b%d failed\n", i)); res = false;
}
}
// The strCache does have some duplicates in it, mostly 'the'. Make
// sure that we wind them and that different cache entries really are
// different by strcmp. Fundamental to OSSymbol semantics.
countDups = 0;
for (i = 0; i < numStrCache; i++)
for (j = i+1; j < numStrCache; j++) {
if (cache[i] != cache[j] && cache[i]->isEqualTo(cache[j])) {
verPrintf(("testSymbol(u) test 2a%d,%d failed\n", i, j));
res = false;
}
else if (cache[i] == cache[j]) {
if (cache[i]->getRetainCount() == 1) {
verPrintf(("testSymbol(u) test 2b%d,%d failed\n", i, j));
res = false;
}
countDups++;
}
}
TEST_ASSERT('u', "2c", countDups);
// Clear out the cache and check that the unique'ing hashtable has grown
for (i = 0; i < numStrCache; i++) {
if (cache[i]) {
cache[i]->release();
cache[i] = 0;
}
}
// As of 1998-11-17 the hash growth is 364.
res = res && checkSpace("(u)3", spaceCheck, 972);
logSpace();
// Check for leaks by repeating the cacheing and freeing
spaceCheck = checkPointSpace();
for (i = 0; i < numStrCache; i++)
cache[i] = OSSymbol::withCString(strCache[i]);
for (i = 0; i < numStrCache; i++) {
if (cache[i]) {
cache[i]->release();
cache[i] = 0;
}
}
res = res && checkSpace("(u)4", spaceCheck, 0);
// Check that the OSString based symbol constructors work
// and that they don't leak, and finally double check that while
// the cache is active the symbol semantics still work.
spaceCheck = checkPointSpace();
for (i = 0; i < numStrCache; i++) {
OSString *tmpStr;
tmpStr = (i&1)
? OSString::withCString(strCache[i])
: OSString::withCStringNoCopy(strCache[i]);
if (tmpStr) {
cache[i] = OSSymbol::withString(tmpStr);
if (!cache[i]) {
verPrintf(("testSymbol(u) test 5a%d failed\n", i));
res = false;
}
tmpStr->release();
}
}
for (i = 0; i < numStrCache; i++) {
if (cache[i]) {
const OSSymbol *tmpSymb;
tmpSymb = OSSymbol::withCStringNoCopy(strCache[i]);
if (cache[i] != tmpSymb) {
verPrintf(("testSymbol(u) test 5b%d failed\n", i));
res = false;
}
tmpSymb->release();
cache[i]->release();
cache[i] = 0;
}
else {
verPrintf(("testSymbol(u) test 5c%d failed\n", i));
res = false;
}
}
res = res && checkSpace("(u)5", spaceCheck, 0);
if (res)
verPrintf(("testSymbol: All OSSymbol Tests passed\n"));
else
logPrintf(("testSymbol: Some OSSymbol Tests failed\n"));
}
