Add basic pattern scanner.

Signed-off-by: aixxe <me@aixxe.net>

src/Utilities/FindPattern.h

@@ -0,0 +1,29 @@
+#pragma once
+
+// Slightly modified version of P47R!CK & dom1n1k's pattern scanner.
+inline bool Compare(const uint8_t* data, const uint8_t* pattern, const char* mask) {
+	for (; *mask; ++mask, ++data, ++pattern) {
+		if (*mask == 'x' && *data != *pattern) {
+			return false;
+		}
+	}
+
+	return *mask == 0;
+}
+
+static uintptr_t FindPattern(const char* library, const char* pattern_string, const char* mask) {
+	size_t address = 0, length = 0;
+	
+	if (!Linker::GetLibraryInformation(library, &address, &length))
+		return 0;
+
+	const uint8_t* pattern = reinterpret_cast<const uint8_t*>(pattern_string);
+
+	for (size_t i = 0; i < length; i++) {
+		if (Compare(reinterpret_cast<uint8_t*>(address + i), pattern, mask)) {
+			return address + i;
+		}
+	}
+
+	return 0;
+}