text: /*
   * xcam_common.cpp - xcam common
   *
   *  Copyright (c) 2014-2015 Intel Corporation
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   *
   * Author: Wind Yuan <feng.yuan@intel.com>
   */
  
  #ifdef HAVE_CONFIG_H
  #include "config.h"
  #endif
  
  #include <base/xcam_common.h>
  #include <fcntl.h>
  #include <errno.h>
  #include <sys/ioctl.h>
  #include <stdarg.h>
  
  static char log_file_name[XCAM_MAX_STR_SIZE] = {0};
  
  uint32_t xcam_version ()
  {
      return XCAM_VERSION;
  }
  
  void * xcam_malloc(size_t size)
  {
      return malloc (size);
  }
  
  void * xcam_malloc0(size_t size)
  {
      void * ptr = malloc (size);
      memset (ptr, 0, size);
      return ptr;
  }
  
  void xcam_free(void *ptr)
  {
      if (ptr)
          free (ptr);
  }
  
  int xcam_device_ioctl (int fd, uint32_t cmd, void *arg)
  {
      int ret = 0;
      int tried_time = 0;
  
      if (fd < 0)
          return -1;
  
      while (1) {
          ret = ioctl (fd, cmd, arg);
          if (ret >= 0)
              break;
          if (errno != EINTR && errno != EAGAIN)
              break;
          if (++tried_time > 5)
              break;
      }
  
      if (ret >= 0) {
          XCAM_LOG_DEBUG ("ioctl return ok on fd(%d), cmd:%d", fd, cmd);
      } else {
          XCAM_LOG_DEBUG ("ioctl failed on fd(%d), cmd:%d, error:%s",
                          fd, cmd, strerror(errno));
      }
      return ret;
  }
  
  const char *
  xcam_fourcc_to_string (uint32_t fourcc)
  {
      static char str[5];
  
      xcam_mem_clear (str);
      memcpy (str, &fourcc, 4);
      return str;
  }
  
  void xcam_print_log (const char* format, ...) {
      char buffer[XCAM_MAX_STR_SIZE] = {0};
  
      va_list va_list;
      va_start (va_list, format);
      vsnprintf (buffer, XCAM_MAX_STR_SIZE, format, va_list);
      va_end (va_list);
  
      if (strlen (log_file_name) > 0) {
          FILE* p_file = fopen (log_file_name, "ab+");
          if (NULL != p_file) {
              fwrite (buffer, sizeof (buffer[0]), strlen (buffer), p_file);
              fclose (p_file);
          } else {
              printf ("%s", buffer);
          }
      } else {
          printf ("%s", buffer);
      }
  }
  
  void xcam_set_log (const char* file_name) {
      if (NULL != file_name) {
          memset (log_file_name, 0, XCAM_MAX_STR_SIZE);
          strncpy (log_file_name, file_name, XCAM_MAX_STR_SIZE - 1);
      }
  }
  
  