client/android/jni_tools.c

   1 //
   2 // Created by DXL on 2017/9/1.
   3 //
   4
   5 //including header
   6 #include <malloc.h>
   7 #include <jni_tools.h>
   8 #include "stdbool.h"
   9
  10 // native thread attach label
  11 static bool g_IsAttach;
  12
  13 // get current env for jvm
  14 JNIEnv *getJniEnv() {
  15     JNIEnv *currentThreadEnv;
  16     g_IsAttach = false;
  17     if ((*g_JavaVM)->GetEnv(g_JavaVM, (void **) &currentThreadEnv, JNI_VERSION_1_4) != JNI_OK) {
  18         LOGE("Get Env Fail!");
  19         if ((*g_JavaVM)->AttachCurrentThread(g_JavaVM, &currentThreadEnv, NULL) != JNI_OK) {
  20             LOGE("Attach the current thread Fail!");
  21             g_IsAttach = false;
  22             return NULL;
  23         } else {
  24             g_IsAttach = true;
  25             LOGE("Attach the current thread Success!");
  26             return currentThreadEnv;
  27         }
  28     } else {
  29         g_IsAttach = false;
  30         //LOGE("Get Env Success!");
  31         return currentThreadEnv;
  32     }
  33 }
  34
  35 // detach native thread from jvm
  36 void detachThread() {
  37     if (g_IsAttach) {
  38         (*g_JavaVM)->DetachCurrentThread(g_JavaVM);
  39     }
  40 }
  41
  42 //  cmd arg parse
  43 CMD *parse_command_line(const char *commandStr) {
  44     CMD *cmd = (CMD *) malloc(sizeof(CMD));
  45     if (!cmd) {
  46         return NULL;
  47     }
  48     // copy the source to the heap
  49     char *pTmp = strdup(commandStr);
  50     // new memory size is default 20 for char **
  51     int size = 20;
  52     cmd->cmd = (char **) malloc(size * sizeof(char **));
  53     if (!cmd->cmd) {
  54         free(cmd);
  55         return NULL;
  56     }
  57     // parse
  58     char *pStr = strtok(pTmp, " ");
  59     cmd->cmd[0] = pStr;
  60     int count = 1;
  61     for (; pStr != NULL; ++count) {
  62         // Capacity expansion
  63         if (count == (size - 1)) {
  64             size += 20;
  65             cmd->cmd = (char **) realloc(cmd->cmd, size * sizeof(char **));
  66         }
  67         pStr = strtok(NULL, " ");
  68         if (pStr) {
  69             cmd->cmd[count] = pStr;
  70         }
  71     }
  72     cmd->len = (count - 1);
  73     return cmd;
  74 }
  75
  76 // cmd arg struct free
  77 void free_command_line(CMD *cmd) {
  78     free(cmd->cmd[0]);
  79     free(cmd->cmd);
  80     free(cmd);
  81 }