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Factor out GZip shenanigans.

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This commit is contained in:
Thomas Harte 2022-08-08 10:52:55 -04:00
parent 868d179132
commit 025c79ca65
4 changed files with 64 additions and 27 deletions
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6
OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj
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@ -972,6 +972,7 @@
4BC6236E26F4235400F83DFE /* Copper.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4BC6236C26F4235400F83DFE /* Copper.cpp */; };
4BC6236F26F426B400F83DFE /* FAT.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4B477709268FBE4D005C2340 /* FAT.cpp */; };
4BC6237226F94BCB00F83DFE /* MintermTests.mm in Sources */ = {isa = PBXBuildFile; fileRef = 4BC6237126F94BCB00F83DFE /* MintermTests.mm */; };
4BC62FF228A149300036AE59 /* NSData+dataWithContentsOfGZippedFile.m in Sources */ = {isa = PBXBuildFile; fileRef = 4BC62FF128A149300036AE59 /* NSData+dataWithContentsOfGZippedFile.m */; };
4BC751B21D157E61006C31D9 /* 6522Tests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4BC751B11D157E61006C31D9 /* 6522Tests.swift */; };
4BC76E691C98E31700E6EF73 /* FIRFilter.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4BC76E671C98E31700E6EF73 /* FIRFilter.cpp */; };
4BC890D3230F86020025A55A /* DirectAccessDevice.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4BC890D1230F86020025A55A /* DirectAccessDevice.cpp */; };
@ -2056,6 +2057,8 @@
4BC6236C26F4235400F83DFE /* Copper.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = Copper.cpp; sourceTree = "<group>"; };
4BC6237026F94A5B00F83DFE /* Minterms.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = Minterms.hpp; sourceTree = "<group>"; };
4BC6237126F94BCB00F83DFE /* MintermTests.mm */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.objcpp; path = MintermTests.mm; sourceTree = "<group>"; };
4BC62FF028A149300036AE59 /* NSData+dataWithContentsOfGZippedFile.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "NSData+dataWithContentsOfGZippedFile.h"; sourceTree = "<group>"; };
4BC62FF128A149300036AE59 /* NSData+dataWithContentsOfGZippedFile.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = "NSData+dataWithContentsOfGZippedFile.m"; sourceTree = "<group>"; };
4BC751B11D157E61006C31D9 /* 6522Tests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = 6522Tests.swift; sourceTree = "<group>"; };
4BC76E671C98E31700E6EF73 /* FIRFilter.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = FIRFilter.cpp; sourceTree = "<group>"; };
4BC76E681C98E31700E6EF73 /* FIRFilter.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = FIRFilter.hpp; sourceTree = "<group>"; };
@ -4290,6 +4293,8 @@
4BFCA12A1ECBE7C400AC40C1 /* ZexallTests.swift */,
4B3BA0C41D318B44005DD7A7 /* Bridges */,
4B1414631B588A1100E04248 /* Test Binaries */,
4BC62FF028A149300036AE59 /* NSData+dataWithContentsOfGZippedFile.h */,
4BC62FF128A149300036AE59 /* NSData+dataWithContentsOfGZippedFile.m */,
);
path = "Clock SignalTests";
sourceTree = "<group>";
@ -6132,6 +6137,7 @@
4B778F4F23A5F21C0000D260 /* StaticAnalyser.cpp in Sources */,
4B8DD3682633B2D400B3C866 /* SpectrumVideoContentionTests.mm in Sources */,
4B7752A928217E200073E2C5 /* 65816Storage.cpp in Sources */,
4BC62FF228A149300036AE59 /* NSData+dataWithContentsOfGZippedFile.m in Sources */,
4B7752AC28217E6E0073E2C5 /* StaticAnalyser.cpp in Sources */,
4B778F1223A5EC720000D260 /* CRT.cpp in Sources */,
4B778EF423A5DB3A0000D260 /* C1540.cpp in Sources */,

31
OSBindings/Mac/Clock SignalTests/AmigaBlitterTests.mm
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@ -9,10 +9,10 @@
#import <XCTest/XCTest.h>
#include "Blitter.hpp"
#include "NSData+dataWithContentsOfGZippedFile.h"
#include <unordered_map>
#include <vector>
#include <zlib.h>
namespace Amiga {
/// An empty stub to satisfy Amiga::Blitter's inheritance from Amiga::DMADevice;
@ -38,32 +38,9 @@ struct Chipset {
Amiga::Chipset nonChipset;
Amiga::Blitter<true> blitter(nonChipset, ram, 256 * 1024);
NSURL *const traceURL = [[NSBundle bundleForClass:[self class]]
URLForResource:name withExtension:@"json.gz" subdirectory:@"Amiga Blitter Tests"];
// Use gzopen/etc to decompress to a temporary file, then read that back
// into memory to provide to the JSON deserialiser. This avoids having to wade
// too deeply into ZLib's slightly circuitous handling of decompression when
// the destination size is unkoinw.
NSString *const tempDir = NSTemporaryDirectory();
NSString *const tempFile = [tempDir stringByAppendingPathComponent:@"temp.json"];
const gzFile compressedFile = gzopen([traceURL fileSystemRepresentation], "rb");
FILE *const uncompressedFile = fopen([tempFile UTF8String], "wb");
uint8_t buffer[64 * 1024];
while(true) {
const auto length = gzread(compressedFile, buffer, sizeof(buffer));
if(!length) break;
fwrite(buffer, 1, length, uncompressedFile);
if(length != sizeof(buffer)) break;
}
fclose(uncompressedFile);
gzclose(compressedFile);
// Open and parse.
NSData *const traceData = [NSData dataWithContentsOfFile:tempFile];
NSString *const tracePath = [[NSBundle bundleForClass:[self class]]
pathForResource:name ofType:@"json.gz" inDirectory:@"Amiga Blitter Tests"];
NSData *const traceData = [NSData dataWithContentsOfGZippedFile:tracePath];
NSArray *const trace = [NSJSONSerialization JSONObjectWithData:traceData options:0 error:nil];
XCTAssertNotNil(trace);

19
OSBindings/Mac/Clock SignalTests/NSData+dataWithContentsOfGZippedFile.h Normal file
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@ -0,0 +1,19 @@
//
// NSData+dataWithContentsOfGZippedFile.h
// Clock SignalTests
//
// Created by Thomas Harte on 08/08/2022.
// Copyright © 2022 Thomas Harte. All rights reserved.
//
#import <Foundation/Foundation.h>
NS_ASSUME_NONNULL_BEGIN
@interface NSData (dataWithContentsOfGZippedFile)
+ (instancetype)dataWithContentsOfGZippedFile:(NSString *)path;
@end
NS_ASSUME_NONNULL_END

35
OSBindings/Mac/Clock SignalTests/NSData+dataWithContentsOfGZippedFile.m Normal file
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@ -0,0 +1,35 @@
//
// NSData+dataWithContentsOfGZippedFile.m
// Clock SignalTests
//
// Created by Thomas Harte on 08/08/2022.
// Copyright © 2022 Thomas Harte. All rights reserved.
//
#import "NSData+dataWithContentsOfGZippedFile.h"
#include <zlib.h>
@implementation NSData (dataWithContentsOfGZippedFile)
+ (instancetype)dataWithContentsOfGZippedFile:(NSString *)path {
gzFile compressedFile = gzopen([path UTF8String], "rb");
if(!compressedFile) {
return nil;
}
NSMutableData *data = [[NSMutableData alloc] init];
uint8_t buffer[64 * 1024];
while(true) {
int length = gzread(compressedFile, buffer, sizeof(buffer));
if(!length) break;
[data appendBytes:buffer length:length];
if(length != sizeof(buffer)) break;
}
gzclose(compressedFile);
return data;
}
@end