From a9dc12bfbcc2663cc7c8c5faa6240e14bc4f8b3a Mon Sep 17 00:00:00 2001
From: Jhen-Jie Hong <developer@jhen.me>
Date: Thu, 6 Feb 2025 11:51:25 +0800
Subject: [PATCH] feat(ios): impl toggleNativeLog

---
 ios/RNLlama.h         |  8 --------
 ios/RNLlama.mm        | 13 ++++++++++++-
 ios/RNLlamaContext.h  |  1 +
 ios/RNLlamaContext.mm | 27 +++++++++++++++++++++++++++
 4 files changed, 40 insertions(+), 9 deletions(-)

diff --git a/ios/RNLlama.h b/ios/RNLlama.h
index e58cf614..db735792 100644
--- a/ios/RNLlama.h
+++ b/ios/RNLlama.h
@@ -1,11 +1,3 @@
-#ifdef __cplusplus
-#if RNLLAMA_BUILD_FROM_SOURCE
-#import "rn-llama.h"
-#else
-#import <rnllama/rn-llama.h>
-#endif
-#endif
-
 #import <React/RCTEventEmitter.h>
 #import <React/RCTBridgeModule.h>
 
diff --git a/ios/RNLlama.mm b/ios/RNLlama.mm
index 91de6498..cdd89b4e 100644
--- a/ios/RNLlama.mm
+++ b/ios/RNLlama.mm
@@ -13,6 +13,16 @@ @implementation RNLlama
 
 RCT_EXPORT_MODULE()
 
+RCT_EXPORT_METHOD(toggleNativeLog:(BOOL)enabled) {
+    void (^onEmitLog)(NSString *level, NSString *text) = nil;
+    if (enabled) {
+        onEmitLog = ^(NSString *level, NSString *text) {
+            [self sendEventWithName:@"@RNLlama_onNativeLog" body:@{ @"level": level, @"text": text }];
+        };
+    }
+    [RNLlamaContext toggleNativeLog:enabled onEmitLog:onEmitLog];
+}
+
 RCT_EXPORT_METHOD(setContextLimit:(double)limit
                  withResolver:(RCTPromiseResolveBlock)resolve
                  withRejecter:(RCTPromiseRejectBlock)reject)
@@ -41,7 +51,7 @@ @implementation RNLlama
     }
 
     if (llamaDQueue == nil) {
-      llamaDQueue = dispatch_queue_create("com.rnllama", DISPATCH_QUEUE_SERIAL);
+        llamaDQueue = dispatch_queue_create("com.rnllama", DISPATCH_QUEUE_SERIAL);
     }
 
     if (llamaContexts == nil) {
@@ -159,6 +169,7 @@ - (NSArray *)supportedEvents {
   return@[
     @"@RNLlama_onInitContextProgress",
     @"@RNLlama_onToken",
+    @"@RNLlama_onNativeLog",
   ];
 }
 
diff --git a/ios/RNLlamaContext.h b/ios/RNLlamaContext.h
index 937b6d64..63380187 100644
--- a/ios/RNLlamaContext.h
+++ b/ios/RNLlamaContext.h
@@ -25,6 +25,7 @@
     rnllama::llama_rn_context * llama;
 }
 
++ (void)toggleNativeLog:(BOOL)enabled onEmitLog:(void (^)(NSString *level, NSString *text))onEmitLog;
 + (NSDictionary *)modelInfo:(NSString *)path skip:(NSArray *)skip;
 + (instancetype)initWithParams:(NSDictionary *)params onProgress:(void (^)(unsigned int progress))onProgress;
 - (void)interruptLoad;
diff --git a/ios/RNLlamaContext.mm b/ios/RNLlamaContext.mm
index 6d4d2294..873a2cc6 100644
--- a/ios/RNLlamaContext.mm
+++ b/ios/RNLlamaContext.mm
@@ -3,6 +3,33 @@
 
 @implementation RNLlamaContext
 
++ (void)toggleNativeLog:(BOOL)enabled onEmitLog:(void (^)(NSString *level, NSString *text))onEmitLog {
+  if (enabled) {
+      void (^copiedBlock)(NSString *, NSString *) = [onEmitLog copy];
+      llama_log_set([](lm_ggml_log_level level, const char * text, void * data) {
+          llama_log_callback_default(level, text, data);
+          NSString *levelStr = @"";
+          if (level == LM_GGML_LOG_LEVEL_ERROR) {
+              levelStr = @"error";
+          } else if (level == LM_GGML_LOG_LEVEL_INFO) {
+              levelStr = @"info";
+          } else if (level == LM_GGML_LOG_LEVEL_WARN) {
+              levelStr = @"warn";
+          }
+
+          NSString *textStr = [NSString stringWithUTF8String:text];
+          // NOTE: Convert to UTF-8 string may fail
+          if (!textStr) {
+              return;
+          }
+          void (^block)(NSString *, NSString *) = (__bridge void (^)(NSString *, NSString *))(data);
+          block(levelStr, textStr);
+      }, copiedBlock);
+  } else {
+      llama_log_set(llama_log_callback_default, nullptr);
+  }
+}
+
 + (NSDictionary *)modelInfo:(NSString *)path skip:(NSArray *)skip {
     struct lm_gguf_init_params params = {
         /*.no_alloc = */ false,