Add the files

1 files changed, 225 insertions, 0 deletions

diff --git a/src/common/apple/cf_helpers.c b/src/common/apple/cf_helpers.c
new file mode 100644
index 0000000..60e1a1c
--- /dev/null
+++ b/src/common/apple/cf_helpers.c
@@ -0,0 +1,225 @@
+#include "cf_helpers.h"
+
+const char* ffCfNumGetInt64(CFTypeRef cf, int64_t* result) {
+    if (CFGetTypeID(cf) == CFNumberGetTypeID()) {
+        if (!CFNumberGetValue((CFNumberRef) cf, kCFNumberSInt64Type, result)) {
+            return "Number type is not SInt64";
+        }
+        return NULL;
+    } else if (CFGetTypeID(cf) == CFDataGetTypeID()) {
+        if (CFDataGetLength((CFDataRef) cf) != sizeof(int64_t)) {
+            return "Data length is not sizeof(int64_t)";
+        }
+        CFDataGetBytes((CFDataRef) cf, CFRangeMake(0, sizeof(int64_t)), (uint8_t*) result);
+        return NULL;
+    }
+
+    return "TypeID is neither 'CFNumber' nor 'CFData'";
+}
+
+const char* ffCfNumGetInt(CFTypeRef cf, int32_t* result) {
+    if (CFGetTypeID(cf) == CFNumberGetTypeID()) {
+        if (!CFNumberGetValue((CFNumberRef) cf, kCFNumberSInt32Type, result)) {
+            return "Number type is not SInt32";
+        }
+        return NULL;
+    } else if (CFGetTypeID(cf) == CFDataGetTypeID()) {
+        if (CFDataGetLength((CFDataRef) cf) != sizeof(*result)) {
+            return "Data length is not sizeof(int32_t)";
+        }
+        CFDataGetBytes((CFDataRef) cf, CFRangeMake(0, sizeof(*result)), (uint8_t*) result);
+        return NULL;
+    }
+
+    return "TypeID is neither 'CFNumber' nor 'CFData'";
+}
+
+const char* ffCfNumGetDouble(CFTypeRef cf, double* result) {
+    if (CFGetTypeID(cf) == CFNumberGetTypeID()) {
+        if (!CFNumberGetValue((CFNumberRef) cf, kCFNumberDoubleType, result) &&
+            !CFNumberGetValue((CFNumberRef) cf, kCFNumberFloatType, result)) {
+            return "Number type is not Double or Float";
+        }
+        return NULL;
+    }
+
+    return "TypeID is neither 'CFNumber'";
+}
+
+const char* ffCfDateGetEpoch(CFTypeRef cf, uint64_t* result) {
+    if (CFGetTypeID(cf) != CFDateGetTypeID()) {
+        return "TypeID is not 'CFDate'";
+    }
+
+    CFAbsoluteTime absTime = CFDateGetAbsoluteTime((CFDateRef) cf);
+    // Convert from seconds to milliseconds and add the difference between 1970 and 2001 in milliseconds
+    *result = (uint64_t) ((absTime + 978307200 /*kCFAbsoluteTimeIntervalSince1970*/) * 1000);
+    return NULL;
+}
+
+const char* ffCfStrGetString(CFTypeRef cf, FFstrbuf* result) {
+    ffStrbufClear(result);
+    if (!cf) {
+        return NULL;
+    }
+
+    if (CFGetTypeID(cf) == CFStringGetTypeID()) {
+        CFStringRef cfStr = (CFStringRef) cf;
+
+        const char* cstr = CFStringGetCStringPtr(cfStr, kCFStringEncodingUTF8);
+        if (cstr) {
+            ffStrbufSetS(result, cstr);
+        } else {
+            uint32_t length = (uint32_t) CFStringGetLength(cfStr);
+            if (length == 0) {
+                return NULL;
+            }
+            ffStrbufEnsureFixedLengthFree(result, (uint32_t) CFStringGetMaximumSizeForEncoding(length, kCFStringEncodingUTF8));
+            if (!CFStringGetCString(cfStr, 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);
+        }
+    } else if (CFGetTypeID(cf) == CFDataGetTypeID()) {
+        CFDataRef cfData = (CFDataRef) cf;
+        uint32_t length = (uint32_t) CFDataGetLength(cfData);
+        if (length == 0) {
+            return NULL;
+        }
+        ffStrbufEnsureFixedLengthFree(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 "TypeID is neither 'CFString' nor 'CFData'";
+    }
+
+    return NULL;
+}
+
+const char* ffCfDataGetDataAsString(CFTypeRef cf, FFstrbuf* result) {
+    ffStrbufClear(result);
+    if (!cf) {
+        return NULL;
+    }
+
+    if (CFGetTypeID(cf) == CFDataGetTypeID()) {
+        CFDataRef cfData = (CFDataRef) cf;
+        uint32_t length = (uint32_t) CFDataGetLength(cfData);
+        if (length == 0) {
+            return NULL;
+        }
+        ffStrbufEnsureFixedLengthFree(result, length + 1);
+        CFDataGetBytes(cfData, CFRangeMake(0, length), (uint8_t*) result->chars);
+        result->length = length;
+        result->chars[result->length] = '\0';
+    } else {
+        return "TypeID is not 'CFData'";
+    }
+
+    return NULL;
+}
+
+const char* ffCfDictGetString(CFDictionaryRef dict, CFStringRef key, FFstrbuf* result) {
+    CFTypeRef cf = (CFTypeRef) CFDictionaryGetValue(dict, key);
+    if (cf == NULL) {
+        return "CFDictionaryGetValue() failed";
+    }
+
+    return ffCfStrGetString(cf, result);
+}
+
+const char* ffCfDictGetDataAsString(CFDictionaryRef dict, CFStringRef key, FFstrbuf* result) {
+    CFTypeRef cf = (CFTypeRef) CFDictionaryGetValue(dict, key);
+    if (cf == NULL) {
+        return "CFDictionaryGetValue() failed";
+    }
+
+    return ffCfDataGetDataAsString(cf, result);
+}
+
+const char* ffCfDictGetBool(CFDictionaryRef dict, CFStringRef key, bool* result) {
+    CFBooleanRef cf = (CFBooleanRef) CFDictionaryGetValue(dict, key);
+    if (cf == NULL) {
+        return "CFDictionaryGetValue() failed";
+    }
+
+    if (CFGetTypeID(cf) != CFBooleanGetTypeID()) {
+        return "TypeID is not 'CFBoolean'";
+    }
+
+    *result = CFBooleanGetValue(cf);
+    return NULL;
+}
+
+const char* ffCfDictGetInt(CFDictionaryRef dict, CFStringRef key, int* result) {
+    CFTypeRef cf = (CFTypeRef) CFDictionaryGetValue(dict, key);
+    if (cf == NULL) {
+        return "CFDictionaryGetValue() failed";
+    }
+
+    return ffCfNumGetInt(cf, result);
+}
+
+const char* ffCfDictGetInt64(CFDictionaryRef dict, CFStringRef key, int64_t* result) {
+    CFTypeRef cf = (CFTypeRef) CFDictionaryGetValue(dict, key);
+    if (cf == NULL) {
+        return "CFDictionaryGetValue() failed";
+    }
+
+    return ffCfNumGetInt64(cf, result);
+}
+
+const char* ffCfDictGetDouble(CFDictionaryRef dict, CFStringRef key, double* result) {
+    CFTypeRef cf = (CFTypeRef) CFDictionaryGetValue(dict, key);
+    if (cf == NULL) {
+        return "CFDictionaryGetValue() failed";
+    }
+
+    return ffCfNumGetDouble(cf, result);
+}
+
+const char* ffCfDictGetData(CFDictionaryRef dict, CFStringRef key, uint32_t offset, uint32_t size, uint8_t* result, uint32_t* length) {
+    CFTypeRef cf = (CFTypeRef) CFDictionaryGetValue(dict, key);
+    if (cf == NULL) {
+        return "CFDictionaryGetValue() failed";
+    }
+
+    if (CFGetTypeID(cf) != CFDataGetTypeID()) {
+        return "TypeID is not 'CFData'";
+    }
+
+    CFIndex trueLength = CFDataGetLength((CFDataRef) cf);
+
+    if (trueLength < offset + size) {
+        return "Data length is less than offset + size";
+    }
+
+    if (length) {
+        *length = (uint32_t) trueLength;
+    }
+
+    CFDataGetBytes((CFDataRef) cf, CFRangeMake(offset, size), result);
+    return NULL;
+}
+
+const char* ffCfDictGetDict(CFDictionaryRef dict, CFStringRef key, CFDictionaryRef* result) {
+    CFDictionaryRef cf = (CFDictionaryRef) CFDictionaryGetValue(dict, key);
+    if (cf == NULL || CFGetTypeID(cf) != CFDictionaryGetTypeID()) {
+        return "TypeID is not 'CFDictionary'";
+    }
+
+    *result = cf;
+    return NULL;
+}
+
+const char* ffCfDictGetDateAsEpoch(CFDictionaryRef dict, CFStringRef key, uint64_t* result) {
+    CFTypeRef cf = (CFTypeRef) CFDictionaryGetValue(dict, key);
+    if (cf == NULL) {
+        return "CFDictionaryGetValue() failed";
+    }
+
+    return ffCfDateGetEpoch(cf, result);
+}