Implemented uiInit() on macOS. The tests work so far!

common/init.c

@@ -5,28 +5,54 @@
 
 static int initialized = 0;
 
-int uiprivInitCheckParams(void *options, uiInitError *err)
+#define errAlreadyInitialized "libui already initialized"
+#define errOptionsMustBeNULL "options parameter to uiInit() must be NULL"
+
+static const char *commonInitErrors[] = {
+	errAlreadyInitialized,
+	errOptionsMustBeNULL,
+	NULL,
+};
+
+static int checkInitErrorLengths(uiInitError *err, const char *initErrors[])
+{
+	const char **p;
+
+	for (p = initErrors; *p != NULL; p++)
+		if (strlen(*p) > 255) {
+			strcpy(err->Message, "[INTERNAL] uiInit() error too long: ");
+			strncat(err->Message, *p, 32);
+			strcat(err->Message, "...");
+			return 0;
+		}
+	return 1;
+}
+
+int uiprivInitCheckParams(void *options, uiInitError *err, const char *initErrors[])
 {
 	if (err == NULL)
 		return 0;
 	if (err->Size != sizeof (uiInitError))
 		return 0;
 
+	if (!checkInitErrorLengths(err, commonInitErrors))
+		return 0;
+	if (!checkInitErrorLengths(err, initErrors))
+		return 0;
+
 	if (initialized)
-		return uiprivInitReturnError(err, "xxxxxxxxx");
+		return uiprivInitReturnError(err, errAlreadyInitialized);
 
 	if (options != NULL)
-		return uiprivInitReturnError(err, "xxxxxxxx");
+		return uiprivInitReturnError(err, errOptionsMustBeNULL);
 
 	return 1;
 }
 
 int uiprivInitReturnError(uiInitError *err, const char *msg)
 {
+	// checkInitErrorLengths() above ensures that err->Message[255] will always be '\0'
 	strncpy(err->Message, msg, 256);
-	if (err->Message[255] != '\0')
-		// TODO there should be some check to make sure this doesn't happen
-		err->Message[255] = '\0';
 	return 0;
 }
 

common/uipriv.h

@@ -1,6 +1,6 @@
 // 19 april 2019
 
 // init.c
-extern int uiprivInitCheckParams(void *options, uiInitError *err);
+extern int uiprivInitCheckParams(void *options, uiInitError *err, const char *initErrors[]);
 extern int uiprivInitReturnError(uiInitError *err, const char *msg);
 extern void uiprivMarkInitialized(void);

darwin/main.m

@@ -0,0 +1,34 @@
+// 20 april 2019
+#import "uipriv_darwin.h"
+
+@interface uiprivApplication : NSApplication
+@end
+
+@implementation uiprivApplication
+@end
+
+static NSApplication *uiprivApp;
+
+#define errNSAppAlreadyInitialized "NSApp is not of type uiprivApplication; was likely already initialized beforehand"
+
+static const char *initErrors[] = {
+	errNSAppAlreadyInitialized,
+	NULL,
+};
+
+int uiInit(void *options, uiInitError *err)
+{
+	if (!uiprivInitCheckParams(options, err, initErrors))
+		return 0;
+
+	uiprivApp = [uiprivApplication sharedApplication];
+	if (![NSApp isKindOfClass:[uiprivApplication class]])
+		return uiprivInitReturnError(err, errNSAppAlreadyInitialized);
+
+	uiprivMarkInitialized();
+	return 1;
+}
+
+void uiUninit(void)
+{
+}

darwin/meson.build

@@ -0,0 +1,16 @@
+# 23 march 2019
+
+libui_sources += [
+	'darwin/main.m',
+]
+
+libui_deps += [
+	meson.get_compiler('objc').find_library('objc',
+		required: true),
+	dependency('appleframeworks',
+		modules: ['Foundation', 'AppKit'],
+		required: true),
+]
+libui_soversion = 'A'
+# the / is required by some older versions of OS X
+libui_rpath = '@executable_path/'

darwin/uipriv_darwin.h

@@ -0,0 +1,18 @@
+// 6 january 2015
+// note: as of OS X Sierra, the -mmacosx-version-min compiler options governs deprecation warnings; keep these around anyway just in case
+#define MAC_OS_X_VERSION_MIN_REQUIRED MAC_OS_X_VERSION_10_8
+#define MAC_OS_X_VERSION_MAX_ALLOWED MAC_OS_X_VERSION_10_8
+#import <Cocoa/Cocoa.h>
+#import <dlfcn.h>		// see future.m
+#import "../ui.h"
+#import "../ui_darwin.h"
+#import "../common/uipriv.h"
+
+#if __has_feature(objc_arc)
+#error Sorry, libui cannot be compiled with ARC.
+#endif
+
+// TODO find a better place for this
+#ifndef NSAppKitVersionNumber10_9
+#define NSAppKitVersionNumber10_9 1265
+#endif

meson.build

@@ -145,7 +145,7 @@ if libui_OS == 'windows'
 #	subdir('windows')
 	install_headers('ui_windows.h')
 elif libui_OS == 'darwin'
-#	subdir('darwin')
+	subdir('darwin')
 	install_headers('ui_darwin.h')
 else
 #	subdir('unix')

test/initmain.c

@@ -3,11 +3,14 @@
 #include "../ui.h"
 #include "testing.h"
 
-#define invalidOptionsError "TODOTODOTODO"
+// TODO fix up the formatting of testing.c so we can use newlines on the got/want stuff
-#define alreadyInitializedError "TODOTODOTODO"
+
+#define errInvalidOptions "options parameter to uiInit() must be NULL"
+#define errAlreadyInitialized "libui already initialized"
 
 testingTestBefore(Init)
 {
+	uiInitError err;
 	int ret;
 
 	ret = uiInit(NULL, NULL);
@@ -26,8 +29,8 @@ testingTestBefore(Init)
 	ret = uiInit(&err, &err);
 	if (ret != 0)
 		testingTErrorf(t, "uiInit() with non-NULL options succeeded with return value %d; expected failure", err);
-	if (strcmp(err.Message, invalidOptionsError) != 0)
+	if (strcmp(err.Message, errInvalidOptions) != 0)
-		testingTErrorf(t, "uiInit() with non-NULL options returned bad error message: got %s, want %s", err.Message, invalidOptionsError);
+		testingTErrorf(t, "uiInit() with non-NULL options returned bad error message: got %s, want %s", err.Message, errInvalidOptions);
 
 	memset(&err, 0, sizeof (uiInitError));
 	err.Size = sizeof (uiInitError);
@@ -40,8 +43,8 @@ testingTestBefore(Init)
 	ret = uiInit(NULL, &err);
 	if (ret != 0)
 		testingTErrorf(t, "uiInit() after a previous successful call succeeded with return value %d; expected failure", ret);
-	if (strcmp(err.Message, alreadyInitializedError) != 0)
+	if (strcmp(err.Message, errAlreadyInitialized) != 0)
-		testingTErrorf(t, "uiInit() after a previous successful call returned bad error message: got %s, want %s", err.Message, alreadyInitializedError);
+		testingTErrorf(t, "uiInit() after a previous successful call returned bad error message: got %s, want %s", err.Message, errAlreadyInitialized);
 }
 
 testingTestAfter(Uninit)

ui.h

@@ -13,7 +13,7 @@ extern "C" {
 #ifdef uiprivBuildingLibui
 #if defined(_WIN32) && !defined(uiStatic)
 #define uiprivExtern __declspec(dllexport) extern
-#elif deffined(_WIN32)
+#elif defined(_WIN32)
 #define uiprivExtern extern
 #else
 #define uiprivExtern __attribute__((visibility("default"))) extern