feat: add static method for read model info from gguf

android/src/main/java/com/rnllama/LlamaContext.java

@@ -358,6 +358,10 @@ private static String getCpuFeatures() {
     }
   }
 
+  protected static native WritableMap modelInfo(
+    String model,
+    String[] skip
+  );
   protected static native long initContext(
     String model,
     boolean embedding,

android/src/main/java/com/rnllama/RNLlama.java

@@ -42,6 +42,35 @@ public void setContextLimit(double limit, Promise promise) {
     promise.resolve(null);
   }
 
+  public void modelInfo(final String model, final ReadableArray skip, final Promise promise) {
+    new AsyncTask<Void, Void, WritableMap>() {
+      private Exception exception;
+
+      @Override
+      protected WritableMap doInBackground(Void... voids) {
+        try {
+          String[] skipArray = new String[skip.size()];
+          for (int i = 0; i < skip.size(); i++) {
+            skipArray[i] = skip.getString(i);
+          }
+          return LlamaContext.modelInfo(model, skipArray);
+        } catch (Exception e) {
+          exception = e;
+        }
+        return null;
+      }
+
+      @Override
+      protected void onPostExecute(WritableMap result) {
+        if (exception != null) {
+          promise.reject(exception);
+          return;
+        }
+        promise.resolve(result);
+      }
+    }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
+  }
+
   public void initContext(double id, final ReadableMap params, final Promise promise) {
     final int contextId = (int) id;
     AsyncTask task = new AsyncTask<Void, Void, WritableMap>() {

android/src/main/jni.cpp

@@ -9,8 +9,9 @@
 #include <thread>
 #include <unordered_map>
 #include "llama.h"
-#include "rn-llama.hpp"
+#include "llama-impl.h"
 #include "ggml.h"
+#include "rn-llama.hpp"
 
 #define UNUSED(x) (void)(x)
 #define TAG "RNLLAMA_ANDROID_JNI"
@@ -132,6 +133,72 @@ static inline void putArray(JNIEnv *env, jobject map, const char *key, jobject v
     env->CallVoidMethod(map, putArrayMethod, jKey, value);
 }
 
+JNIEXPORT jobject JNICALL
+Java_com_rnllama_LlamaContext_modelInfo(
+    JNIEnv *env,
+    jobject thiz,
+    jstring model_path_str,
+    jobjectArray skip
+) {
+    UNUSED(thiz);
+
+    const char *model_path_chars = env->GetStringUTFChars(model_path_str, nullptr);
+
+    std::vector<std::string> skip_vec;
+    int skip_len = env->GetArrayLength(skip);
+    for (int i = 0; i < skip_len; i++) {
+        jstring skip_str = (jstring) env->GetObjectArrayElement(skip, i);
+        const char *skip_chars = env->GetStringUTFChars(skip_str, nullptr);
+        skip_vec.push_back(skip_chars);
+        env->ReleaseStringUTFChars(skip_str, skip_chars);
+    }
+
+    struct lm_gguf_init_params params = {
+        /*.no_alloc = */ false,
+        /*.ctx      = */ NULL,
+    };
+    struct lm_gguf_context * ctx = lm_gguf_init_from_file(model_path_chars, params);
+
+    if (!ctx) {
+        LOGI("%s: failed to load '%s'\n", __func__, model_path_chars);
+        return nullptr;
+    }
+
+    auto info = createWriteableMap(env);
+    putInt(env, info, "version", lm_gguf_get_version(ctx));
+    putInt(env, info, "alignment", lm_gguf_get_alignment(ctx));
+    putInt(env, info, "data_offset", lm_gguf_get_data_offset(ctx));
+    {
+        const int n_kv = lm_gguf_get_n_kv(ctx);
+
+        for (int i = 0; i < n_kv; ++i) {
+            const char * key = lm_gguf_get_key(ctx, i);
+
+            bool skipped = false;
+            if (skip_len > 0) {
+                for (int j = 0; j < skip_len; j++) {
+                    if (skip_vec[j] == key) {
+                        skipped = true;
+                        break;
+                    }
+                }
+            }
+
+            if (skipped) {
+                continue;
+            }
+
+            const std::string value = rnllama::lm_gguf_kv_to_str(ctx, i);
+            putString(env, info, key, value.c_str());
+        }
+    }
+
+    env->ReleaseStringUTFChars(model_path_str, model_path_chars);
+    lm_gguf_free(ctx);
+
+    return reinterpret_cast<jobject>(info);
+}
+
 struct callback_context {
     JNIEnv *env;
     rnllama::llama_rn_context *llama;

android/src/newarch/java/com/rnllama/RNLlamaModule.java

@@ -37,6 +37,11 @@ public void setContextLimit(double limit, Promise promise) {
     rnllama.setContextLimit(limit, promise);
   }
 
+  @ReactMethod
+  public void modelInfo(final String model, final ReadableArray skip, final Promise promise) {
+    rnllama.modelInfo(model, skip, promise);
+  }
+
   @ReactMethod
   public void initContext(double id, final ReadableMap params, final Promise promise) {
     rnllama.initContext(id, params, promise);

android/src/oldarch/java/com/rnllama/RNLlamaModule.java

@@ -38,6 +38,11 @@ public void setContextLimit(double limit, Promise promise) {
     rnllama.setContextLimit(limit, promise);
   }
 
+  @ReactMethod
+  public void modelInfo(final String model, final ReadableArray skip, final Promise promise) {
+    rnllama.modelInfo(model, skip, promise);
+  }
+
   @ReactMethod
   public void initContext(double id, final ReadableMap params, final Promise promise) {
     rnllama.initContext(id, params, promise);

cpp/rn-llama.hpp

@@ -4,11 +4,67 @@
 #include <sstream>
 #include <iostream>
 #include "common.h"
+#include "ggml.h"
 #include "llama.h"
+#include "llama-impl.h"
 #include "sampling.h"
 
 namespace rnllama {
 
+static std::string lm_gguf_data_to_str(enum lm_gguf_type type, const void * data, int i) {
+    switch (type) {
+        case LM_GGUF_TYPE_UINT8:   return std::to_string(((const uint8_t  *)data)[i]);
+        case LM_GGUF_TYPE_INT8:    return std::to_string(((const int8_t   *)data)[i]);
+        case LM_GGUF_TYPE_UINT16:  return std::to_string(((const uint16_t *)data)[i]);
+        case LM_GGUF_TYPE_INT16:   return std::to_string(((const int16_t  *)data)[i]);
+        case LM_GGUF_TYPE_UINT32:  return std::to_string(((const uint32_t *)data)[i]);
+        case LM_GGUF_TYPE_INT32:   return std::to_string(((const int32_t  *)data)[i]);
+        case LM_GGUF_TYPE_UINT64:  return std::to_string(((const uint64_t *)data)[i]);
+        case LM_GGUF_TYPE_INT64:   return std::to_string(((const int64_t  *)data)[i]);
+        case LM_GGUF_TYPE_FLOAT32: return std::to_string(((const float    *)data)[i]);
+        case LM_GGUF_TYPE_FLOAT64: return std::to_string(((const double   *)data)[i]);
+        case LM_GGUF_TYPE_BOOL:    return ((const bool *)data)[i] ? "true" : "false";
+        default:                return "unknown type: {}"; // TODO
+    }
+}
+
+static std::string lm_gguf_kv_to_str(const struct lm_gguf_context * ctx_gguf, int i) {
+    const enum lm_gguf_type type = lm_gguf_get_kv_type(ctx_gguf, i);
+
+    switch (type) {
+        case LM_GGUF_TYPE_STRING:
+            return lm_gguf_get_val_str(ctx_gguf, i);
+        case LM_GGUF_TYPE_ARRAY:
+            {
+                const enum lm_gguf_type arr_type = lm_gguf_get_arr_type(ctx_gguf, i);
+                int arr_n = lm_gguf_get_arr_n(ctx_gguf, i);
+                const void * data = lm_gguf_get_arr_data(ctx_gguf, i);
+                std::stringstream ss;
+                ss << "[";
+                for (int j = 0; j < arr_n; j++) {
+                    if (arr_type == LM_GGUF_TYPE_STRING) {
+                        std::string val = lm_gguf_get_arr_str(ctx_gguf, i, j);
+                        // escape quotes
+                        replace_all(val, "\\", "\\\\");
+                        replace_all(val, "\"", "\\\"");
+                        ss << '"' << val << '"';
+                    } else if (arr_type == LM_GGUF_TYPE_ARRAY) {
+                        ss << "???";
+                    } else {
+                        ss << lm_gguf_data_to_str(arr_type, data, j);
+                    }
+                    if (j < arr_n - 1) {
+                        ss << ", ";
+                    }
+                }
+                ss << "]";
+                return ss.str();
+            }
+        default:
+            return lm_gguf_data_to_str(type, lm_gguf_get_val_data(ctx_gguf, i), 0);
+    }
+}
+
 static void llama_batch_clear(llama_batch *batch) {
     batch->n_tokens = 0;
 }

docs/API/README.md

@@ -20,6 +20,7 @@ llama.rn
 
 - [convertJsonSchemaToGrammar](README.md#convertjsonschematogrammar)
 - [initLlama](README.md#initllama)
+- [loadLlamaModelInfo](README.md#loadllamamodelinfo)
 - [releaseAllLlama](README.md#releaseallllama)
 - [setContextLimit](README.md#setcontextlimit)
 
@@ -43,7 +44,7 @@ llama.rn
 
 #### Defined in
 
-[index.ts:52](https://github.com/mybigday/llama.rn/blob/41b779f/src/index.ts#L52)
+[index.ts:52](https://github.com/mybigday/llama.rn/blob/66d2ed3/src/index.ts#L52)
 
 ___
 
@@ -53,7 +54,7 @@ ___
 
 #### Defined in
 
-[index.ts:44](https://github.com/mybigday/llama.rn/blob/41b779f/src/index.ts#L44)
+[index.ts:44](https://github.com/mybigday/llama.rn/blob/66d2ed3/src/index.ts#L44)
 
 ___
 
@@ -63,7 +64,7 @@ ___
 
 #### Defined in
 
-[index.ts:42](https://github.com/mybigday/llama.rn/blob/41b779f/src/index.ts#L42)
+[index.ts:42](https://github.com/mybigday/llama.rn/blob/66d2ed3/src/index.ts#L42)
 
 ___
 
@@ -80,7 +81,7 @@ ___
 
 #### Defined in
 
-[index.ts:32](https://github.com/mybigday/llama.rn/blob/41b779f/src/index.ts#L32)
+[index.ts:32](https://github.com/mybigday/llama.rn/blob/66d2ed3/src/index.ts#L32)
 
 ## Functions
 
@@ -104,7 +105,7 @@ ___
 
 #### Defined in
 
-[grammar.ts:824](https://github.com/mybigday/llama.rn/blob/41b779f/src/grammar.ts#L824)
+[grammar.ts:824](https://github.com/mybigday/llama.rn/blob/66d2ed3/src/grammar.ts#L824)
 
 ___
 
@@ -125,7 +126,27 @@ ___
 
 #### Defined in
 
-[index.ts:196](https://github.com/mybigday/llama.rn/blob/41b779f/src/index.ts#L196)
+[index.ts:208](https://github.com/mybigday/llama.rn/blob/66d2ed3/src/index.ts#L208)
+
+___
+
+### loadLlamaModelInfo
+
+▸ **loadLlamaModelInfo**(`model`): `Promise`<`Object`\>
+
+#### Parameters
+
+| Name | Type |
+| :------ | :------ |
+| `model` | `string` |
+
+#### Returns
+
+`Promise`<`Object`\>
+
+#### Defined in
+
+[index.ts:202](https://github.com/mybigday/llama.rn/blob/66d2ed3/src/index.ts#L202)
 
 ___
 
@@ -139,7 +160,7 @@ ___
 
 #### Defined in
 
-[index.ts:233](https://github.com/mybigday/llama.rn/blob/41b779f/src/index.ts#L233)
+[index.ts:245](https://github.com/mybigday/llama.rn/blob/66d2ed3/src/index.ts#L245)
 
 ___
 
@@ -159,4 +180,4 @@ ___
 
 #### Defined in
 
-[index.ts:188](https://github.com/mybigday/llama.rn/blob/41b779f/src/index.ts#L188)
+[index.ts:188](https://github.com/mybigday/llama.rn/blob/66d2ed3/src/index.ts#L188)