Source/CDLCBuildVersion.m

// -*- mode: ObjC -*-

//  This file is part of class-dump, a utility for examining the Objective-C segment of Mach-O files.
//  Copyright (C) 1997-2019 Steve Nygard.

#import "CDLCBuildVersion.h"

#import "CDMachOFile.h"

static NSString *NSStringFromBuildVersionPlatform(uint32_t platform)
{
    switch (platform) {
        case PLATFORM_MACOS:            return @"macOS";
        case PLATFORM_IOS:              return @"iOS";
        case PLATFORM_TVOS:             return @"tvOS";
        case PLATFORM_WATCHOS:          return @"watchOS";
        case PLATFORM_BRIDGEOS:         return @"bridgeOS";
        case PLATFORM_IOSMAC:           return @"iOS Mac";
        case PLATFORM_IOSSIMULATOR:     return @"iOS Simulator";
        case PLATFORM_TVOSSIMULATOR:    return @"tvOS Simulator";
        case PLATFORM_WATCHOSSIMULATOR: return @"watchOS Simulator";
        default:               return [NSString stringWithFormat:@"Unknown platform %x", platform];
    }
}

static NSString *NSStringFromBuildVersionTool(uint32_t tool)
{
    switch (tool) {
        case TOOL_CLANG: return @"clang";
        case TOOL_SWIFT: return @"swift";
        case TOOL_LD:    return @"ld";
        default:         return [NSString stringWithFormat:@"Unknown tool %x", tool];
    }
}

static NSString *NSStringFromBuildVersionToolNotATuple(uint64_t tuple)
{
    uint32_t tool = tuple >> 32;
    uint32_t version = tool & 0xffffffff;
    return [NSString stringWithFormat:@"%@ %u", NSStringFromBuildVersionTool(tool), version];
}

@implementation CDLCBuildVersion
{
    struct build_version_command _buildVersionCommand;
    NSArray *_tools;
}

- (id)initWithDataCursor:(CDMachOFileDataCursor *)cursor;
{
    if ((self = [super initWithDataCursor:cursor])) {
        _buildVersionCommand.cmd      = [cursor readInt32];
        _buildVersionCommand.cmdsize  = [cursor readInt32];
        _buildVersionCommand.platform = [cursor readInt32];
        _buildVersionCommand.minos    = [cursor readInt32];
        _buildVersionCommand.sdk      = [cursor readInt32];
        _buildVersionCommand.ntools   = [cursor readInt32];
        NSMutableArray *tools = [NSMutableArray array];
        for (NSUInteger index = 0; index < _buildVersionCommand.ntools; index++) {
            // ISO tuples.
            uint32_t tool    = [cursor readInt32];
            uint32_t version = [cursor readInt32];
            uint64_t iso_tuples = ((uint64_t)tool << 32) | version;
            [tools addObject:@(iso_tuples)];
        }
        _tools = [tools copy];
    }

    return self;
}

#pragma mark -

- (uint32_t)cmd;
{
    return _buildVersionCommand.cmd;
}

- (uint32_t)cmdsize;
{
    return _buildVersionCommand.cmdsize;
}

- (NSString *)buildVersionString;
{
    return [NSString stringWithFormat:@"Platform: %@ %u.%u.%u, SDK: %u.%u.%u",
            NSStringFromBuildVersionPlatform(_buildVersionCommand.platform),
            _buildVersionCommand.minos >> 16,
            (_buildVersionCommand.minos >> 8) & 0xff,
            _buildVersionCommand.minos & 0xff,

            _buildVersionCommand.sdk >> 16,
            (_buildVersionCommand.sdk >> 8) & 0xff,
            _buildVersionCommand.sdk & 0xff];
}

- (NSArray *)toolStrings;
{
    NSMutableArray *tools = [NSMutableArray array];
    // iso map
    for (NSNumber *tuple in _tools) {
        [tools addObject:NSStringFromBuildVersionToolNotATuple([tuple unsignedLongValue])];
    }

    return [tools copy];
}

- (void)appendToString:(NSMutableString *)resultString verbose:(BOOL)isVerbose;
{
    [super appendToString:resultString verbose:isVerbose];

    [resultString appendFormat:@"    Build version: %@\n", self.buildVersionString];
}

@end