string_buffer.cpp

Go to the documentation of this file.

/*
 * Copyright 2008 Search Solution Corporation
 * Copyright 2016 CUBRID 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.
 *
 */

/*
 * string_buffer.cpp
 */

#include "string_buffer.hpp"

#include <algorithm>  // for std::min
#include <memory.h>

void string_buffer::add_bytes (size_t len, const char *bytes)
{
  assert (bytes != NULL);
  m_ext_block.extend_to (m_len + len + 2);
  memcpy (m_ext_block.get_ptr () + m_len, bytes, len);
  m_len += len;
  m_ext_block.get_ptr ()[m_len] = '\0';
}

/*
 * hex_dump : appends a buffer containing hex dump of input and optionally the ASCII content
 *
 * in : input string
 * max_to_dump : maximum contents to dump from input
 * line_size : number of characters to dump in each line (counting from input)
 * print_ascii : if true, prints the ASCII content of input on the right of hex dump
 */
void
string_buffer::hex_dump (const string_buffer &in, const size_t max_to_dump,
             const size_t line_size, const bool print_ascii)
{
  const char *buf = in.get_buffer ();
  size_t buf_len = std::min (max_to_dump, in.len ());

  return hex_dump (buf, buf_len, line_size, print_ascii);
}

void
string_buffer::hex_dump (const char *ptr, const size_t length, const size_t line_size, const bool print_ascii)
{
  const char *ptr_line = ptr;

  this->operator() ("  0000: ");
  for (size_t i = 0; i < length; i++)
    {
      this->operator() ("%02X ", (unsigned char) (*ptr++));
      if (print_ascii == true
      && (i % line_size == (line_size - 1) || i == length - 1))
    {
      const char *ptr_print;

      if (i % line_size != (line_size - 1))
        {
          std::string spaces (3 * (line_size - 1 - (i % line_size)), ' ');
          this->operator() ("%s", spaces.c_str ());
        }

      for (ptr_print = ptr_line; ptr_print < ptr; ptr_print++)
        {
          if (*ptr_print >= 32 && (unsigned char) *ptr_print < 128)
        {
          this->operator() ("%c", *ptr_print);
        }
          else
        {
          this->operator() (".");
        }
        }

      ptr_line += line_size;
    }

      if (i % line_size == (line_size - 1) && i != length)
    {
      this->operator() ("\n  %04d: ", i + 1);
    }
    }
  this->operator() ("\n");
}