Translation some comments from Chinese to English.

client/android/CMakeLists.txt

@@ -1,17 +1,20 @@
-#需要的最cmake版本
+# version
 cmake_minimum_required(VERSION 3.4.1)
 
-#添加预编译宏定义参数，此次的作用是开启配置文件的引入!
+# We are build on android platform, so we need add def "ANDROID"
+# NDK version for SDK 19 doesn't implement the whole C++11 standard in the STL.
+# see: https://stackoverflow.com/questions/44736135/ndk-clang-error-undefined-reference-to-localeconv
+# so we need add def getlocaledecpoint()='.'
 add_definitions(-DANDROID -D"getlocaledecpoint()='.'" -DZ_SOLO)
 
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c99 -O3 -fvisibility=hidden -w")
 
-#缩短路径定义
+# Root path into client
 set(PM3_ROOT ../../)
 
 add_subdirectory(../deps deps)
 
-#添加动态库定义
+# client resources
 add_library(pm3rrg_rdv4 SHARED
         ${PM3_ROOT}/common/util_posix.c
         ${PM3_ROOT}/common/crapto1/crapto1.c
@@ -143,13 +146,12 @@ add_library(pm3rrg_rdv4 SHARED
         ${PM3_ROOT}/client/src/cmdlfpcf7931.c
         ${PM3_ROOT}/client/src/cmdhfmfhard.c
         ${PM3_ROOT}/client/src/cmdusart.c
-
+        # android resources
-        # android source
         jni_tools.c
         pm3_main.c
         )
 
-#添加头文件配置
+# includes
 target_include_directories(pm3rrg_rdv4 PRIVATE
         ${CMAKE_CURRENT_SOURCE_DIR}
         ${PM3_ROOT}/include/
@@ -166,5 +168,4 @@ find_library(pm3rrg_rdv4_reveng REQUIRED)
 find_library(pm3rrg_rdv4_z REQUIRED)
 find_library(pm3rrg_rdv4_hardnested REQUIRED)
 
-target_link_libraries(pm3rrg_rdv4 pm3rrg_rdv4_hardnested pm3rrg_rdv4_mbedtls pm3rrg_rdv4_cliparser pm3rrg_rdv4_jansson pm3rrg_rdv4_lua pm3rrg_rdv4_tinycbor pm3rrg_rdv4_amiibo pm3rrg_rdv4_reveng pm3rrg_rdv4_z android log)
+target_link_libraries(pm3rrg_rdv4 pm3rrg_rdv4_hardnested pm3rrg_rdv4_mbedtls pm3rrg_rdv4_cliparser pm3rrg_rdv4_jansson pm3rrg_rdv4_lua pm3rrg_rdv4_tinycbor pm3rrg_rdv4_amiibo pm3rrg_rdv4_reveng pm3rrg_rdv4_z android log)
-#添加动态库链接!

client/android/jni_tools.c

@@ -7,10 +7,10 @@
 #include <jni_tools.h>
 #include "stdbool.h"
 
-//当前线程是否添加的标志位
+// native thread attach label
 static bool g_IsAttach;
 
-//TODO 环境变量获取函数
+// get current env for jvm
 JNIEnv *getJniEnv() {
     JNIEnv *currentThreadEnv;
     g_IsAttach = false;
@@ -32,66 +32,47 @@ JNIEnv *getJniEnv() {
     }
 }
 
-//解绑线程env
+// detach native thread from jvm
-void deatchThread() {
+void detachThread() {
     if (g_IsAttach) {
-        LOGD("线程解绑成功!");
         (*g_JavaVM)->DetachCurrentThread(g_JavaVM);
     }
 }
 
-//TODO 命令行解析
+//  cmd arg parse
 CMD *parse_command_line(const char *commandStr) {
-    //一个指针，指向传进来的命令字符串（const修饰的，我们需要复刻一份!）
     CMD *cmd = (CMD *) malloc(sizeof(CMD));
     if (!cmd) {
-        LOGD("申请空间失败!");
         return NULL;
     }
-    //拷贝字符串到堆空间!
+    // copy the source to the heap
     char *pTmp = strdup(commandStr);
-    LOGD("拷贝参数字符串到临时堆!");
+    // new memory size is default 20 for char **
-    //返回的结果!先初始化为20个空间
     int size = 20;
     cmd->cmd = (char **) malloc(size * sizeof(char **));
-    if (cmd->cmd) {
+    if (!cmd->cmd) return NULL;
-        LOGD("申请参数空间成功!");
+    // parse
-    } else {
-        LOGD("申请空间失败!");
-    }
-    //进行截取
     char *pStr = strtok(pTmp, " ");
-    LOGD("第0次截取完成: %s", pStr);
-    //给结果数组进行下标为0的第一次初始化
     cmd->cmd[0] = pStr;
-    //局部变量用于储存解析到的命令个数，下标移动为一
     int count = 1;
-    //需要截取命令参数，以空格为限定符
     for (; pStr != NULL; ++count) {
-        //如果容量不够，则扩容!
+        // Capacity expansion
         if (count == (size - 1)) {
             size += 20;
             cmd->cmd = (char **) realloc(cmd->cmd, size * sizeof(char **));
-            LOGD("超过初始容量，自动扩容!");
         }
         pStr = strtok(NULL, " ");
         if (pStr) {
             cmd->cmd[count] = pStr;
-            LOGD("第%d次截取完成: %s", count, pStr);
         }
     }
     cmd->len = (count - 1);
-    LOGD("解析函数执行完成!");
     return cmd;
 }
 
-//内存释放
+// cmd arg struct free
 void free_command_line(CMD *cmd) {
-    //二级指针需要逐层释放!
-    LOGD("释放命令行字符串二级引用!");
     free(cmd->cmd[0]);
-    LOGD("释放命令行一级引用!");
     free(cmd->cmd);
-    LOGD("释放结构体内存");
     free(cmd);
 }

client/android/jni_tools.h

@@ -10,31 +10,31 @@
 #include <string.h>
 
 //JNI LOG
-#define TAG "DXL BlUESPP_PN532"
+#define TAG "PM3"
 #define LOGV(...) __android_log_print(ANDROID_LOG_VERBOSE,TAG,__VA_ARGS__)
 #define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG,TAG,__VA_ARGS__)
 #define LOGI(...) __android_log_print(ANDROID_LOG_INFO,TAG,__VA_ARGS__)
 #define LOGW(...) __android_log_print(ANDROID_LOG_WARN,TAG,__VA_ARGS__)
 #define LOGE(...) __android_log_print(ANDROID_LOG_ERROR,TAG,__VA_ARGS__)
 
-//全局的环境变量定义
+// a global jvm instance
 JavaVM *g_JavaVM;
 
-//线程环境指针获取函数
+// get current env for jvm
 JNIEnv *getJniEnv();
 
-//子线程释放函数,必须是native层创建的线程才可以调用
+// detach native thread from jvm， must native thread can detach!
-void deatchThread();
+void detachThread();
 
 typedef struct {
     char **cmd;
     int len;
 } CMD;
 
-//命令行解析函数
+// cmd arg parse
 CMD *parse_command_line(const char *commandStr);
 
-//解析结果释放函数!
+// cmd arg struct free
 void free_command_line(CMD *);
 
 #endif //DXL_TOOLS_H

client/android/pm3_main.c

@@ -79,7 +79,7 @@ static bool open() {
 }
 
 /*
- * 发送一条命令等待执行!
+ * Transfers to the command buffer and waits for a new command to be executed
  * */
 jint sendCMD(JNIEnv *env, jobject instance, jstring cmd_) {
     //may be pm3 not running.
@@ -93,19 +93,9 @@ jint sendCMD(JNIEnv *env, jobject instance, jstring cmd_) {
             CloseProxmark();
         }
     }
-    //无论如何，新的命令的输入了，就要换个行!
+    // display on new line
     PrintAndLogEx(NORMAL, "\n");
-    char *cmd = (char *)((*env)->GetStringUTFChars(env, cmd_, 0));
+    char *cmd = (char *) ((*env)->GetStringUTFChars(env, cmd_, 0));
-    // Many parts of the PM3 client will assume that they can read any write from pwd. So we set
-    // pwd to whatever the PM3 "executable directory" is, to get consistent behaviour.
-    /*int ret = chdir(get_my_executable_directory());
-    if (ret == -1) {
-        LOGW("Couldn't chdir(get_my_executable_directory()), errno=%s", strerror(errno));
-    }
-    char pwd[1024];
-    memset((void *) &pwd, 0, sizeof(pwd));
-    getcwd((char *) &pwd, sizeof(pwd));
-    LOGI("pwd = %s", pwd);*/
     int ret = CommandReceived(cmd);
     if (ret == 99) {
         // exit / quit
@@ -117,14 +107,14 @@ jint sendCMD(JNIEnv *env, jobject instance, jstring cmd_) {
 }
 
 /*
- * 是否在执行命令
+ * Is client running!
  * */
 jboolean isExecuting(JNIEnv *env, jobject instance) {
-    return (jboolean)((jboolean) conn.run);
+    return (jboolean) ((jboolean) conn.run);
 }
 
 /*
- * 进行设备链接验证!
+ * test hw and hw and client.
  * */
 jboolean testPm3(JNIEnv *env, jobject instance) {
     bool ret1 = open();
@@ -133,13 +123,19 @@ jboolean testPm3(JNIEnv *env, jobject instance) {
         return false;
     }
     bool ret2 = TestProxmark() == PM3_SUCCESS;
-    return (jboolean)(ret1 && ret2);
+    return (jboolean) (ret1 && ret2);
 }
 
+/*
+ * stop pm3 client
+ * */
 void stopPm3(JNIEnv *env, jobject instance) {
     CloseProxmark();
 }
 
+/*
+ * native function map to jvm
+ * */
 JNIEXPORT jint JNI_OnLoad(JavaVM *vm, void *reserved) {
     JNIEnv *jniEnv = NULL;
     if ((*vm)->GetEnv(vm, (void **) &jniEnv, JNI_VERSION_1_4) != JNI_OK) {
@@ -152,21 +148,21 @@ JNIEXPORT jint JNI_OnLoad(JavaVM *vm, void *reserved) {
     }
     jclass clz_test = (*jniEnv)->FindClass(jniEnv, "cn/rrg/devices/Proxmark3RRGRdv4");
     JNINativeMethod methods[] = {
-        {"startExecute", "(Ljava/lang/String;)I", (void *) sendCMD},
+            {"startExecute", "(Ljava/lang/String;)I", (void *) sendCMD},
-        {"stopExecute",  "()V", (void *) stopPm3},
+            {"stopExecute",  "()V",                   (void *) stopPm3},
-        {"isExecuting",  "()Z", (void *) isExecuting}
+            {"isExecuting",  "()Z",                   (void *) isExecuting}
     };
     JNINativeMethod methods1[] = {
-        {"testPm3",  "()Z", (void *) testPm3},
+            {"testPm3",  "()Z", (void *) testPm3},
-        {"closePm3", "()V", stopPm3}
+            {"closePm3", "()V", stopPm3}
     };
     if ((*jniEnv)->RegisterNatives(jniEnv, clazz, methods, sizeof(methods) / sizeof(methods[0])) !=
-            JNI_OK) {
+        JNI_OK) {
         return -1;
     }
     if ((*jniEnv)->RegisterNatives(jniEnv, clz_test, methods1,
                                    sizeof(methods1) / sizeof(methods1[0])) !=
-            JNI_OK) {
+        JNI_OK) {
         return -1;
     }
     (*jniEnv)->DeleteLocalRef(jniEnv, clazz);