A VCD parser aiming to support IEEE 1364-1995.
To load an VCD file from local storage use
[VCD loadWithPath:filePath callback:^(VCD *vcd) {
if(vcd == nil) {
NSLog(@"VCD Parsing Error!");
return;
}
// ...
}];To load a VCD file from a web based location, use
[VCD loadWithURL:[NSURL URLWithString:@"http://your.location/test.vcd"] callback:^(VCD *vcd) {
if(vcd == nil) {
NSLog(@"VCD Parsing Error!");
return;
}
// ...
}];To simplify prototyping, we support a list of sample VCD files which can be accessed by this piece of code:
NSDictionary *samples = [VCD loadAvailableSamples];
for(NSString title in [samples allKeys]) {
NSURL *url = [samples objectForKey:title];
NSLog(@"Title: %@; URL: %@", title, url);
}Please keep in mind, that loadAvailableSamples uses blocking I/O.
[VCD loadWithPath:path callback:^(VCD *vcd) { /* ... */}]: Loads VCD from NSString path and calls callback[VCD loadWithURL:url callback:^(VCD *vcd) { /* ... */}]: Loads VCD from NSURL and calls callback[VCD loadAvailableSamples]: Loads NSDictionary of samples of NSURLs and NSString as its key.[vcd signals]: returns NSDictionary of signals, identified by signal name[vcd timeScale]: returns int of timescale factor[vcd timeScaleUnit]: returns NSString of timescale unit (e.g.ns)[vcd date]: returns NSDate of creation[vcd version]: returns NSString version[vcd scope]: returns NSString scope
VCD *vcd = nil;
// Magically loading a VCD file
// ...
for(VCDSignal *signal in [[vcd signals] allValues]) {
NSLog("Name of signal: %@", [signal name]);
}[signal name]: returns NSString name of signal[signal symbol]: returns NSString symbol of signal[signal symbol]: returns NSString symbol of signal[vcd valueAtTime:time]: returns value at specific time.
VCDSignal *signal = nil;
// Magically loads VCD Signal
// ...
// Access value at specific time.
// Please note, that valueAtTime does NOT respect the timescale!
VCDValue *v = [signal valueAtTime:500];
NSLog(@"First ValueChange at %d", [v time]);
// The VCDValue will be the very first value before the given time.
// Therefore, [v time] will be lesser equal 500.
// Iterate through values:
do {
NSLog("ValueChange at: %d: newValue: %@", [v time], [v value]);
} while(v = [v next]);
// Or in short:
for(VCDValue *v = [signal valueAtTime:500]; v != nil; v = [v next]) {
// ...
}
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