PixelBase64.cc File Reference

#include "CalibFormats/SiPixelObjects/interface/PixelBase64.h"
#include <iostream>

Go to the source code of this file.

Functions
std::string	base64_decode (std::string const &encoded_string)
std::string	base64_encode (unsigned char const *bytes_to_encode, unsigned int in_len)
static bool	is_base64 (unsigned char c)

Variables
static const std::string	base64_chars

Function Documentation

std::string base64_decode

(

std::string const &

encoded_string

)

Definition at line 84 of file PixelBase64.cc.

References base64_chars, mps_fire::i, is_base64(), and AlCaHLTBitMon_QueryRunRegistry::string.

                                                         {
  int in_len = encoded_string.size();
  int i = 0;
  int j = 0;
  int in_ = 0;
  unsigned char char_array_4[4], char_array_3[3];
  std::string ret;

  while (in_len-- && ( encoded_string[in_] != '=') && is_base64(encoded_string[in_])) {
    char_array_4[i++] = encoded_string[in_]; in_++;
    if (i ==4) {
      for (i = 0; i <4; i++)
        char_array_4[i] = base64_chars.find(char_array_4[i]);

      char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4);
      char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2);
      char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3];

      for (i = 0; (i < 3); i++)
        ret += char_array_3[i];
      i = 0;
    }
  }

  if (i) {
    for (j = i; j <4; j++)
      char_array_4[j] = 0;

    for (j = 0; j <4; j++)
      char_array_4[j] = base64_chars.find(char_array_4[j]);

    char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4);
    char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2);
    char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3];

    for (j = 0; (j < i - 1); j++) ret += char_array_3[j];
  }

  return ret;
}

std::string base64_encode	(	unsigned char const *	bytes_to_encode,
		unsigned int	in_len
	)

Definition at line 41 of file PixelBase64.cc.

References base64_chars, mps_fire::i, and AlCaHLTBitMon_QueryRunRegistry::string.

Referenced by pos::PixelConfigBase::getComment(), pos::PixelROCMaskBits::writeXML(), and pos::PixelROCTrimBits::writeXML().

                                                                                   {
  std::string ret;
  int i = 0;
  int j = 0;
  unsigned char char_array_3[3];
  unsigned char char_array_4[4];

  while (in_len--) {
    char_array_3[i++] = *(bytes_to_encode++);
    if (i == 3) {
      char_array_4[0] = (char_array_3[0] & 0xfc) >> 2;
      char_array_4[1] = ((char_array_3[0] & 0x03) << 4) + ((char_array_3[1] & 0xf0) >> 4);
      char_array_4[2] = ((char_array_3[1] & 0x0f) << 2) + ((char_array_3[2] & 0xc0) >> 6);
      char_array_4[3] = char_array_3[2] & 0x3f;

      for(i = 0; (i <4) ; i++)
        ret += base64_chars[char_array_4[i]];
      i = 0;
    }
  }

  if (i)
  {
    for(j = i; j < 3; j++)
      char_array_3[j] = '\0';

    char_array_4[0] = (char_array_3[0] & 0xfc) >> 2;
    char_array_4[1] = ((char_array_3[0] & 0x03) << 4) + ((char_array_3[1] & 0xf0) >> 4);
    char_array_4[2] = ((char_array_3[1] & 0x0f) << 2) + ((char_array_3[2] & 0xc0) >> 6);
    char_array_4[3] = char_array_3[2] & 0x3f;

    for (j = 0; (j < i + 1); j++)
      ret += base64_chars[char_array_4[j]];

    while((i++ < 3))
      ret += '=';

  }

  return ret;

}

static bool is_base64 ( unsigned char  c )

inlinestatic

Definition at line 37 of file PixelBase64.cc.

Referenced by base64_decode().

                                              {
  return (isalnum(c) || (c == '+') || (c == '/'));
}

Variable Documentation

const std::string base64_chars

static

Initial value:

= 
             "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
             "abcdefghijklmnopqrstuvwxyz"
             "0123456789+/"

Definition at line 31 of file PixelBase64.cc.

Referenced by base64_decode(), and base64_encode().