util/cf_helpers: rename; return error info if failed

src/util/apple/cf_helpers.c

@@ -0,0 +1,59 @@
+#include "cf_helpers.h"
+
+const char* ffCfStrGetString(CFStringRef str, FFstrbuf* result)
+{
+    uint32_t length = (uint32_t)CFStringGetLength(str);
+    //CFString stores UTF16 characters, therefore may require larger buffer to convert to UTF8 string
+    ffStrbufEnsureFree(result, length * 2);
+    if(!CFStringGetCString(str, result->chars, result->allocated, kCFStringEncodingUTF8))
+        return "CFStringGetCString() failed";
+    // CFStringGetCString ensures the buffer is NUL terminated
+    // https://developer.apple.com/documentation/corefoundation/1542721-cfstringgetcstring
+    result->length = (uint32_t) strnlen(result->chars, (uint32_t)result->allocated);
+    return NULL;
+}
+
+const char* ffCfDictGetString(CFDictionaryRef dict, CFStringRef key, FFstrbuf* result)
+{
+    CFTypeRef cf = (CFTypeRef)CFDictionaryGetValue(dict, key);
+    if(cf == NULL)
+        return "CFDictionaryGetValue() failed";
+
+    if(CFGetTypeID(cf) == CFStringGetTypeID())
+    {
+        return ffCfStrGetString((CFStringRef)cf, result);
+    }
+    else if(CFGetTypeID(cf) == CFDataGetTypeID())
+    {
+        CFDataRef cfData = (CFDataRef)cf;
+        uint32_t length = (uint32_t)CFDataGetLength(cfData);
+        ffStrbufEnsureFree(result, length + 1);
+        CFDataGetBytes(cfData, CFRangeMake(0, length), (uint8_t*)result->chars);
+        result->length = (uint32_t)strnlen(result->chars, length);
+        result->chars[result->length] = '\0';
+        return NULL;
+    }
+
+    return "TypeID is neither 'CFString' nor 'CFData'";
+}
+
+const char* ffCfDictGetBool(CFDictionaryRef dict, CFStringRef key, bool* result)
+{
+    CFBooleanRef cf = (CFBooleanRef)CFDictionaryGetValue(dict, key);
+    if(cf == NULL || CFGetTypeID(cf) != CFBooleanGetTypeID())
+        return "TypeID is not 'CFBoolean'";
+
+    *result = CFBooleanGetValue(cf);
+    return NULL;
+}
+
+const char* ffCfDictGetInt(CFDictionaryRef dict, CFStringRef key, int* result)
+{
+    CFNumberRef cf = (CFNumberRef)CFDictionaryGetValue(dict, key);
+    if (cf == NULL || CFGetTypeID(cf) != CFNumberGetTypeID())
+        return "TypeID is not 'CFNumber'";
+
+    if(!CFNumberGetValue(cf, kCFNumberSInt32Type, result))
+        return "Number type is not SInt32";
+    return NULL;
+}

src/util/apple/cf_helpers.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#ifndef FASTFETCH_INCLUDED_cf_helpers
+#define FASTFETCH_INCLUDED_cf_helpers
+
+#include "fastfetch.h"
+#include <CoreFoundation/CoreFoundation.h>
+
+//Return error info if failed, NULL otherwise
+const char* ffCfStrGetString(CFStringRef str, FFstrbuf* result);
+const char* ffCfDictGetString(CFDictionaryRef dict, CFStringRef key, FFstrbuf* result);
+const char* ffCfDictGetBool(CFDictionaryRef dict, CFStringRef key, bool* result);
+const char* ffCfDictGetInt(CFDictionaryRef dict, CFStringRef key, int* result);
+
+#endif

src/util/apple/cfdict_helpers.c

@@ -1,57 +0,0 @@
-#include "cfdict_helpers.h"
-
-bool ffCfDictGetString(CFDictionaryRef dict, CFStringRef key, FFstrbuf* result)
-{
-    CFTypeRef cf = (CFTypeRef)CFDictionaryGetValue(dict, key);
-    if(cf == NULL)
-        return false;
-
-    if(CFGetTypeID(cf) == CFStringGetTypeID())
-    {
-        CFStringRef cfStr = (CFStringRef)cf;
-        uint32_t length = (uint32_t)CFStringGetLength(cfStr);
-        //CFString stores UTF16 characters, therefore may require larger buffer to convert to UTF8 string
-        ffStrbufEnsureFree(result, length * 2);
-        if(CFStringGetCString(cfStr, result->chars, result->allocated, kCFStringEncodingUTF8))
-        {
-            // CFStringGetCString ensures the buffer is NUL terminated
-            // https://developer.apple.com/documentation/corefoundation/1542721-cfstringgetcstring
-            result->length = (uint32_t) strnlen(result->chars, (uint32_t)result->allocated);
-        }
-    }
-    else if(CFGetTypeID(cf) == CFDataGetTypeID())
-    {
-        CFDataRef cfData = (CFDataRef)cf;
-        uint32_t length = (uint32_t)CFDataGetLength(cfData);
-        ffStrbufEnsureFree(result, length + 1);
-        CFDataGetBytes(cfData, CFRangeMake(0, length), (uint8_t*)result->chars);
-        result->length = (uint32_t)strnlen(result->chars, length);
-        result->chars[result->length] = '\0';
-    }
-    else
-    {
-        return false;
-    }
-    return true;
-}
-
-bool ffCfDictGetBool(CFDictionaryRef dict, CFStringRef key, bool* result)
-{
-    CFBooleanRef cf = (CFBooleanRef)CFDictionaryGetValue(dict, key);
-    if(cf == NULL || CFGetTypeID(cf) != CFBooleanGetTypeID())
-        return false;
-
-    *result = CFBooleanGetValue(cf);
-    return true;
-}
-
-bool ffCfDictGetInt(CFDictionaryRef dict, CFStringRef key, int* result)
-{
-    CFNumberRef cf = (CFNumberRef)CFDictionaryGetValue(dict, key);
-    if (cf == NULL || CFGetTypeID(cf) != CFNumberGetTypeID())
-        return false;
-
-    if(!CFNumberGetValue(cf, kCFNumberSInt32Type, result))
-        return false;
-    return true;
-}

src/util/apple/cfdict_helpers.h

@@ -1,13 +0,0 @@
-#pragma once
-
-#ifndef FASTFETCH_INCLUDED_cfdict_helpers
-#define FASTFETCH_INCLUDED_cfdict_helpers
-
-#include "fastfetch.h"
-#include <CoreFoundation/CoreFoundation.h>
-
-bool ffCfDictGetString(CFDictionaryRef dict, CFStringRef key, FFstrbuf* result);
-bool ffCfDictGetBool(CFDictionaryRef dict, CFStringRef key, bool* result);
-bool ffCfDictGetInt(CFDictionaryRef dict, CFStringRef key, int* result);
-
-#endif