chore: fix warnings when compiling macOS client with either Xcode or CMake (#6676)

* chore: fix CGFloat comparison warnings in macOS code.

There are 2 cases:
 1. Speed comparisons.
    The lowest significant value displayed in UI is 0.1 bytes per sec.
    See [NSString stringForSpeed] and [NSString stringForSpeedCompact].
 2. Ratio limit comparison.
    The lowest significant value displayed in UI is 0.01 (no unit).
    This is based on maximumFractionDigits=2 set in related XIB file.

Signed-off-by: Dzmitry Neviadomski <nevack.d@gmail.com>

* chore: fix warning about shadowed variable

CGFloat const difference was used twice in the same scope

Signed-off-by: Dzmitry Neviadomski <nevack.d@gmail.com>

* chore: fix unused block parameter warnings

Signed-off-by: Dzmitry Neviadomski <nevack.d@gmail.com>

* chore: disable GCC_WARN_64_TO_32_BIT_CONVERSION for libtransmission

This warnings are not reported with CMake build.

Signed-off-by: Dzmitry Neviadomski <nevack.d@gmail.com>

* chore: disable CLANG_WARN_STRICT_PROTOTYPES for dht

This is third party target, warning is not enabled with CMake build.

Signed-off-by: Dzmitry Neviadomski <nevack.d@gmail.com>

* chore: disable '-Wexit-time-destructors' warning with CMake.

There are two cases when this is reported in libtransmission:
1. `log_state` in anonymous namespace in `log.cc`.
2. static inline `dh_pool_mutex` in `tr_handshake` in `handshake.h`.

I don't see how this may be improved or how this affects correctness,
so don't nag about that.

Signed-off-by: Dzmitry Neviadomski <nevack.d@gmail.com>

---------

Signed-off-by: Dzmitry Neviadomski <nevack.d@gmail.com>

macosx/BadgeView.mm

@@ -5,6 +5,7 @@
 #import "BadgeView.h"
 #import "NSStringAdditions.h"
 #import "NSImageAdditions.h"
+#import "Utils.h"
 
 static CGFloat const kBetweenPadding = 2.0;
 static NSImage* kWhiteUpArrow = [[NSImage imageNamed:@"UpArrowTemplate"] imageWithColor:NSColor.whiteColor];
@@ -61,7 +62,7 @@ typedef NS_ENUM(NSInteger, ArrowDirection) {
 - (BOOL)setRatesWithDownload:(CGFloat)downloadRate upload:(CGFloat)uploadRate
 {
     //only needs update if the badges were displayed or are displayed now
-    if (self.fDownloadRate == downloadRate && self.fUploadRate == uploadRate)
+    if (isSpeedEqual(self.fDownloadRate, downloadRate) && isSpeedEqual(self.fUploadRate, uploadRate))
     {
         return NO;
     }

macosx/CMakeLists.txt

@@ -191,6 +191,8 @@ target_sources(${TR_NAME}-mac
         TrackerTableView.mm
         URLSheetWindowController.h
         URLSheetWindowController.mm
+        Utils.h
+        Utils.mm
         WebSeedTableView.h
         WebSeedTableView.mm)
 

macosx/InfoOptionsViewController.mm

@@ -5,6 +5,7 @@
 #import "InfoOptionsViewController.h"
 #import "NSStringAdditions.h"
 #import "Torrent.h"
+#import "Utils.h"
 
 typedef NS_ENUM(NSInteger, OptionPopupType) {
     OptionPopupTypeGlobal = 0,
@@ -295,7 +296,7 @@ static CGFloat const kStackViewSpacing = 8.0;
             checkRatio = kInvalidValue;
         }
 
-        if (!multipleRatioLimits && ratioLimit != torrent.ratioLimit)
+        if (!multipleRatioLimits && isRatioEqual(ratioLimit, torrent.ratioLimit))
         {
             multipleRatioLimits = YES;
         }

macosx/InfoWindowController.mm

@@ -351,9 +351,9 @@ typedef NS_ENUM(NSUInteger, TabTag) {
         viewRect = [self.fOptionsViewController viewRect];
     }
 
-    CGFloat const difference = NSHeight(viewRect) - oldHeight;
-    windowRect.origin.y -= difference;
-    windowRect.size.height += difference;
+    CGFloat const viewHeightDifference = NSHeight(viewRect) - oldHeight;
+    windowRect.origin.y -= viewHeightDifference;
+    windowRect.size.height += viewHeightDifference;
     windowRect.size.width = MAX(NSWidth(windowRect), minWindowWidth);
 
     if ([self.fViewController respondsToSelector:@selector(saveViewSize)]) //a little bit hacky, but avoids requiring an extra method
@@ -363,11 +363,11 @@ typedef NS_ENUM(NSUInteger, TabTag) {
             CGFloat const screenHeight = NSHeight(window.screen.visibleFrame);
             if (NSHeight(windowRect) > screenHeight)
             {
-                CGFloat const difference = screenHeight - NSHeight(windowRect);
-                windowRect.origin.y -= difference;
-                windowRect.size.height += difference;
+                CGFloat const windowHeightDifference = screenHeight - NSHeight(windowRect);
+                windowRect.origin.y -= windowHeightDifference;
+                windowRect.size.height += windowHeightDifference;
 
-                viewRect.size.height += difference;
+                viewRect.size.height += windowHeightDifference;
             }
         }
 

macosx/PortChecker.mm

@@ -72,7 +72,7 @@ static NSTimeInterval const kCheckFireInterval = 3.0;
                                                   timeoutInterval:15.0];
 
     _fTask = [_fSession dataTaskWithRequest:portProbeRequest
-                          completionHandler:^(NSData* _Nullable data, NSURLResponse* _Nullable response, NSError* _Nullable error) {
+                          completionHandler:^(NSData* _Nullable data, NSURLResponse* _Nullable, NSError* _Nullable error) {
                               if (error)
                               {
                                   NSLog(@"Unable to get port status: connection failed (%@)", error.localizedDescription);

macosx/StatusBarController.mm

@@ -4,6 +4,7 @@
 
 #import "StatusBarController.h"
 #import "NSStringAdditions.h"
+#import "Utils.h"
 
 typedef NSString* StatusRatioType NS_TYPED_EXTENSIBLE_ENUM;
 
@@ -77,13 +78,13 @@ typedef NS_ENUM(NSUInteger, StatusTag) {
 - (void)updateWithDownload:(CGFloat)dlRate upload:(CGFloat)ulRate
 {
     //set rates
-    if (dlRate != self.fPreviousDownloadRate)
+    if (!isSpeedEqual(self.fPreviousDownloadRate, dlRate))
     {
         self.fTotalDLField.stringValue = [NSString stringForSpeed:dlRate];
         self.fPreviousDownloadRate = dlRate;
     }
 
-    if (ulRate != self.fPreviousUploadRate)
+    if (!isSpeedEqual(self.fPreviousUploadRate, ulRate))
     {
         self.fTotalULField.stringValue = [NSString stringForSpeed:ulRate];
         self.fPreviousUploadRate = ulRate;

macosx/TorrentTableView.mm

@@ -125,7 +125,7 @@ static NSTimeInterval const kToggleProgressSeconds = 0.175;
         NSIndexSet* fullIndexSet = [NSIndexSet indexSetWithIndexesInRange:fullRange];
         NSMutableIndexSet* visibleIndexSet = [[NSMutableIndexSet alloc] init];
 
-        [fullIndexSet enumerateIndexesUsingBlock:^(NSUInteger row, BOOL* stop) {
+        [fullIndexSet enumerateIndexesUsingBlock:^(NSUInteger row, BOOL*) {
             id rowView = [self rowViewAtRow:row makeIfNecessary:NO];
             if ([rowView isGroupRowStyle])
             {
@@ -151,7 +151,7 @@ static NSTimeInterval const kToggleProgressSeconds = 0.175;
 
     //redraw fControlButton
     BOOL minimal = [self.fDefaults boolForKey:@"SmallView"];
-    [rowIndexes enumerateIndexesUsingBlock:^(NSUInteger row, BOOL* stop) {
+    [rowIndexes enumerateIndexesUsingBlock:^(NSUInteger row, BOOL*) {
         id rowView = [self rowViewAtRow:row makeIfNecessary:NO];
         if (![rowView isGroupRowStyle])
         {

macosx/Utils.h

@@ -0,0 +1,8 @@
+// This file Copyright © Transmission authors and contributors.
+// It may be used under the MIT (SPDX: MIT) license.
+// License text can be found in the licenses/ folder.
+
+#import <CoreFoundation/CoreFoundation.h>
+
+bool isSpeedEqual(CGFloat old_speed, CGFloat new_speed);
+bool isRatioEqual(CGFloat old_ratio, CGFloat new_ratio);

macosx/Utils.mm

@@ -0,0 +1,19 @@
+// This file Copyright © Transmission authors and contributors.
+// It may be used under the MIT (SPDX: MIT) license.
+// License text can be found in the licenses/ folder.
+
+#include <cmath>
+
+#import "Utils.h"
+
+bool isSpeedEqual(CGFloat old_speed, CGFloat new_speed)
+{
+    static CGFloat constexpr kSpeedCompareEps = 0.1 / 2;
+    return std::abs(new_speed - old_speed) < kSpeedCompareEps;
+}
+
+bool isRatioEqual(CGFloat old_ratio, CGFloat new_ratio)
+{
+    static CGFloat constexpr kRatioCompareEps = 0.01 / 2;
+    return std::abs(new_ratio - old_ratio) < kRatioCompareEps;
+}