1 files changed, 50 insertions, 0 deletions
diff --git a/src/main/java/moe/nea/caelo/optifine/OptifineRegexCache.kt b/src/main/java/moe/nea/caelo/optifine/OptifineRegexCache.kt
new file mode 100644
index 0000000..daded38
--- /dev/null
+++ b/src/main/java/moe/nea/caelo/optifine/OptifineRegexCache.kt
@@ -0,0 +1,50 @@
+package moe.nea.caelo.optifine
+
+import moe.nea.caelo.config.CConfig
+import moe.nea.caelo.event.ResourceReloadEvent
+import moe.nea.caelo.util.MC
+import net.minecraftforge.fml.common.eventhandler.SubscribeEvent
+import org.apache.logging.log4j.LogManager
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable
+import java.util.regex.Pattern
+
+object OptifineRegexCache {
+	val cache: MutableMap<String, Pattern> = mutableMapOf()
+	val illegalRegexes = mutableSetOf<String>()
+	val logger = LogManager.getLogger()
+	val neverRegex = Pattern.compile("$.")
+
+	@SubscribeEvent
+	fun onResourcePackReload(resourceReload: ResourceReloadEvent) {
+		cache.clear()
+	}
+
+	private fun compilePattern(regex: String): Pattern {
+		return try {
+			Pattern.compile(regex)
+		} catch (ex: Exception) {
+			logger.error("Invalid regex $regex in optifine resource pack", ex)
+			illegalRegexes.add(regex)
+			neverRegex
+		}
+	}
+
+	fun matchesRegex(str: String, regex: String, cir: CallbackInfoReturnable<Boolean>) {
+		if (!CConfig.config.optiCache.regexCache) return
+		val pattern = cache.computeIfAbsent(regex, ::compilePattern)
+		cir.returnValue = pattern.matcher(str).matches()
+	}
+
+	fun printStats() {
+		MC.display("Regex Stats:")
+		MC.display("- Cache Size: §a${cache.size}")
+		if (illegalRegexes.isNotEmpty()) {
+			MC.display("- Illegal Regexes:")
+			for (illegalRegex in illegalRegexes) {
+				MC.display("  - §c${illegalRegex}")
+			}
+		}
+	}
+
+
+}
+\ No newline at end of file