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add encoding funs to android lib

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IC Rainbow
2024-11-13 15:46:42 +02:00
parent 6f5321277e
commit 41e61f553c
1 changed files with 40 additions and 0 deletions
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apps/multiplatform/common/src/commonMain/cpp/android/simplex-api.c
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@@ -75,6 +75,46 @@ extern char *chat_encrypt_file(chat_ctrl ctrl, const char *from_path, const char
extern char *chat_decrypt_file(const char *from_path, const char *key, const char *nonce, const char *to_path);
extern char *chat_resize_image_to_str_size(const char *from_path, long max_size);
char * encode_to_utf8_chars(JNIEnv *env, jstring string) {
if (!string) return "";
const jclass cls_string = (*env)->FindClass(env, "java/lang/String");
const jmethodID mid_getBytes = (*env)->GetMethodID(env, cls_string, "getBytes", "(Ljava/lang/String;)[B");
const jbyteArray jbyte_array = (jbyteArray) (*env)->CallObjectMethod(env, string, mid_getBytes, (*env)->NewStringUTF(env, "UTF-8"));
jint length = (jint) (*env)->GetArrayLength(env, jbyte_array);
jbyte *jbytes = malloc(length + 1);
(*env)->GetByteArrayRegion(env, jbyte_array, 0, length, jbytes);
// char * should be null terminated but jbyte * isn't. Terminate it with \0. Otherwise, Haskell will not see the end of string
jbytes[length] = '\0';
//for (int i = 0; i < length; ++i)
// fprintf(stderr, "%d: %02x\n", i, jbytes[i]);
(*env)->DeleteLocalRef(env, jbyte_array);
(*env)->DeleteLocalRef(env, cls_string);
return (char *) jbytes;
}
// As a reference: https://stackoverflow.com/a/60002045
jstring decode_to_utf8_string(JNIEnv *env, char *string) {
jobject bb = (*env)->NewDirectByteBuffer(env, (void *)string, strlen(string));
jclass cls_charset = (*env)->FindClass(env, "java/nio/charset/Charset");
jmethodID mid_charset_forName = (*env)->GetStaticMethodID(env, cls_charset, "forName", "(Ljava/lang/String;)Ljava/nio/charset/Charset;");
jobject charset = (*env)->CallStaticObjectMethod(env, cls_charset, mid_charset_forName, (*env)->NewStringUTF(env, "UTF-8"));
jmethodID mid_decode = (*env)->GetMethodID(env, cls_charset, "decode", "(Ljava/nio/ByteBuffer;)Ljava/nio/CharBuffer;");
jobject cb = (*env)->CallObjectMethod(env, charset, mid_decode, bb);
jclass cls_char_buffer = (*env)->FindClass(env, "java/nio/CharBuffer");
jmethodID mid_to_string = (*env)->GetMethodID(env, cls_char_buffer, "toString", "()Ljava/lang/String;");
jstring res = (*env)->CallObjectMethod(env, cb, mid_to_string);
(*env)->DeleteLocalRef(env, bb);
(*env)->DeleteLocalRef(env, charset);
(*env)->DeleteLocalRef(env, cb);
return res;
}
JNIEXPORT jobjectArray JNICALL
Java_chat_simplex_common_platform_CoreKt_chatMigrateInit(JNIEnv *env, __unused jclass clazz, jstring dbPath, jstring dbKey, jstring confirm) {
const char *_dbPath = (*env)->GetStringUTFChars(env, dbPath, JNI_FALSE);