Base64 Class Reference
[Utilities]

Base64 encode/decode. More...

#include <Base64.h>

List of all members.

Public Member Functions
	Base64 ()
void	encode (FILE *, std::string &, bool add_crlf=true)
void	encode (IFile *, std::string &, bool add_crlf=true)
void	encode (const std::string &, std::string &, bool add_crlf=true)
void	encode (const char *, size_t, std::string &, bool add_crlf=true)
void	encode (const unsigned char *, size_t, std::string &, bool add_crlf=true)
void	decode (const std::string &, std::string &)
void	decode (const std::string &, unsigned char *, size_t &)
size_t	decode_length (const std::string &)
Private Member Functions
	Base64 (const Base64 &)
Base64 &	operator= (const Base64 &)
Static Private Attributes
static const char *	bstr
static const char	rstr [128]

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Detailed Description

Base64 encode/decode.

Definition at line 53 of file Base64.h.

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Constructor & Destructor Documentation

Base64::Base64

(

)

Definition at line 57 of file Base64.cpp.

{
}

Base64::Base64

(

const Base64 &

)

[inline, private]

Definition at line 70 of file Base64.h.

{}

---

Member Function Documentation

void Base64::encode	(	FILE *	fil,
		std::string &	output,
		bool	add_crlf = true
	)

Definition at line 101 of file Base64.cpp.

References bstr.

Referenced by encode().

{
        size_t remain;
        size_t i = 0;
        size_t o = 0;
        char input[4];

        output = "";
        remain = fread(input,1,3,fil);
        while (remain > 0)
        {
                if (add_crlf && o && o % 76 == 0)
                        output += "\n";
                switch (remain)
                {
                case 1:
                        output += bstr[ ((input[i] >> 2) & 0x3f) ];
                        output += bstr[ ((input[i] << 4) & 0x30) ];
                        output += "==";
                        break;
                case 2:
                        output += bstr[ ((input[i] >> 2) & 0x3f) ];
                        output += bstr[ ((input[i] << 4) & 0x30) + ((input[i + 1] >> 4) & 0x0f) ];
                        output += bstr[ ((input[i + 1] << 2) & 0x3c) ];
                        output += "=";
                        break;
                default:
                        output += bstr[ ((input[i] >> 2) & 0x3f) ];
                        output += bstr[ ((input[i] << 4) & 0x30) + ((input[i + 1] >> 4) & 0x0f) ];
                        output += bstr[ ((input[i + 1] << 2) & 0x3c) + ((input[i + 2] >> 6) & 0x03) ];
                        output += bstr[ (input[i + 2] & 0x3f) ];
                }
                o += 4;
                //
                remain = fread(input,1,3,fil);
        }
}

void Base64::encode	(	IFile *	fil,
		std::string &	output,
		bool	add_crlf = true
	)

Definition at line 62 of file Base64.cpp.

References bstr.

{
        size_t remain;
        size_t i = 0;
        size_t o = 0;
        char input[4];

        output = "";
        remain = fil -> fread(input,1,3);
        while (remain > 0)
        {
                if (add_crlf && o && o % 76 == 0)
                        output += "\n";
                switch (remain)
                {
                case 1:
                        output += bstr[ ((input[i] >> 2) & 0x3f) ];
                        output += bstr[ ((input[i] << 4) & 0x30) ];
                        output += "==";
                        break;
                case 2:
                        output += bstr[ ((input[i] >> 2) & 0x3f) ];
                        output += bstr[ ((input[i] << 4) & 0x30) + ((input[i + 1] >> 4) & 0x0f) ];
                        output += bstr[ ((input[i + 1] << 2) & 0x3c) ];
                        output += "=";
                        break;
                default:
                        output += bstr[ ((input[i] >> 2) & 0x3f) ];
                        output += bstr[ ((input[i] << 4) & 0x30) + ((input[i + 1] >> 4) & 0x0f) ];
                        output += bstr[ ((input[i + 1] << 2) & 0x3c) + ((input[i + 2] >> 6) & 0x03) ];
                        output += bstr[ (input[i + 2] & 0x3f) ];
                }
                o += 4;
                //
                remain = fil -> fread(input,1,3);
        }
}

void Base64::encode	(	const std::string &	str_in,
		std::string &	str_out,
		bool	add_crlf = true
	)

Definition at line 140 of file Base64.cpp.

References encode().

{
        encode(str_in.c_str(), str_in.size(), str_out, add_crlf);
}

void Base64::encode	(	const char *	input,
		size_t	l,
		std::string &	output,
		bool	add_crlf = true
	)

Definition at line 146 of file Base64.cpp.

References bstr.

{
        size_t i = 0;
        size_t o = 0;
        
        output = "";
        while (i < l)
        {
                size_t remain = l - i;
                if (add_crlf && o && o % 76 == 0)
                        output += "\n";
                switch (remain)
                {
                case 1:
                        output += bstr[ ((input[i] >> 2) & 0x3f) ];
                        output += bstr[ ((input[i] << 4) & 0x30) ];
                        output += "==";
                        break;
                case 2:
                        output += bstr[ ((input[i] >> 2) & 0x3f) ];
                        output += bstr[ ((input[i] << 4) & 0x30) + ((input[i + 1] >> 4) & 0x0f) ];
                        output += bstr[ ((input[i + 1] << 2) & 0x3c) ];
                        output += "=";
                        break;
                default:
                        output += bstr[ ((input[i] >> 2) & 0x3f) ];
                        output += bstr[ ((input[i] << 4) & 0x30) + ((input[i + 1] >> 4) & 0x0f) ];
                        output += bstr[ ((input[i + 1] << 2) & 0x3c) + ((input[i + 2] >> 6) & 0x03) ];
                        output += bstr[ (input[i + 2] & 0x3f) ];
                }
                o += 4;
                i += 3;
        }
}

void Base64::encode	(	const unsigned char *	input,
		size_t	l,
		std::string &	output,
		bool	add_crlf = true
	)

Definition at line 182 of file Base64.cpp.

References bstr.

{
        size_t i = 0;
        size_t o = 0;
        
        output = "";
        while (i < l)
        {
                size_t remain = l - i;
                if (add_crlf && o && o % 76 == 0)
                        output += "\n";
                switch (remain)
                {
                case 1:
                        output += bstr[ ((input[i] >> 2) & 0x3f) ];
                        output += bstr[ ((input[i] << 4) & 0x30) ];
                        output += "==";
                        break;
                case 2:
                        output += bstr[ ((input[i] >> 2) & 0x3f) ];
                        output += bstr[ ((input[i] << 4) & 0x30) + ((input[i + 1] >> 4) & 0x0f) ];
                        output += bstr[ ((input[i + 1] << 2) & 0x3c) ];
                        output += "=";
                        break;
                default:
                        output += bstr[ ((input[i] >> 2) & 0x3f) ];
                        output += bstr[ ((input[i] << 4) & 0x30) + ((input[i + 1] >> 4) & 0x0f) ];
                        output += bstr[ ((input[i + 1] << 2) & 0x3c) + ((input[i + 2] >> 6) & 0x03) ];
                        output += bstr[ (input[i + 2] & 0x3f) ];
                }
                o += 4;
                i += 3;
        }
}

void Base64::decode	(	const std::string &	input,
		std::string &	output
	)

Definition at line 218 of file Base64.cpp.

References rstr.

Referenced by Utility::base64d(), and HttpdSocket::Send64().

{
        size_t i = 0;
        size_t l = input.size();
        
        output = "";
        while (i < l)
        {
                while (i < l && (input[i] == 13 || input[i] == 10))
                        i++;
                if (i < l)
                {
                        char b1 = (char)((rstr[(int)input[i]] << 2 & 0xfc) +
                                        (rstr[(int)input[i + 1]] >> 4 & 0x03));
                        output += b1;
                        if (input[i + 2] != '=')
                        {
                                char b2 = (char)((rstr[(int)input[i + 1]] << 4 & 0xf0) +
                                                (rstr[(int)input[i + 2]] >> 2 & 0x0f));
                                output += b2;
                        }
                        if (input[i + 3] != '=')
                        {
                                char b3 = (char)((rstr[(int)input[i + 2]] << 6 & 0xc0) +
                                                rstr[(int)input[i + 3]]);
                                output += b3;
                        }
                        i += 4;
                }
        }
}

void Base64::decode	(	const std::string &	input,
		unsigned char *	output,
		size_t &	sz
	)

Definition at line 251 of file Base64.cpp.

References rstr.

{
        size_t i = 0;
        size_t l = input.size();
        size_t j = 0;
        
        while (i < l)
        {
                while (i < l && (input[i] == 13 || input[i] == 10))
                        i++;
                if (i < l)
                {
                        unsigned char b1 = (unsigned char)((rstr[(int)input[i]] << 2 & 0xfc) +
                                        (rstr[(int)input[i + 1]] >> 4 & 0x03));
                        if (output)
                        {
                                output[j] = b1;
                        }
                        j++;
                        if (input[i + 2] != '=')
                        {
                                unsigned char b2 = (unsigned char)((rstr[(int)input[i + 1]] << 4 & 0xf0) +
                                                (rstr[(int)input[i + 2]] >> 2 & 0x0f));
                                if (output)
                                {
                                        output[j] = b2;
                                }
                                j++;
                        }
                        if (input[i + 3] != '=')
                        {
                                unsigned char b3 = (unsigned char)((rstr[(int)input[i + 2]] << 6 & 0xc0) +
                                                rstr[(int)input[i + 3]]);
                                if (output)
                                {
                                        output[j] = b3;
                                }
                                j++;
                        }
                        i += 4;
                }
        }
        sz = j;
}

size_t Base64::decode_length

(

const std::string &

str64

)

Definition at line 297 of file Base64.cpp.

Referenced by HttpdSocket::Send64().

{
        if (!str64.size() || str64.size() % 4)
                return 0;
        size_t l = 3 * (str64.size() / 4 - 1) + 1;
        if (str64[str64.size() - 2] != '=')
                l++;
        if (str64[str64.size() - 1] != '=')
                l++;
        return l;
}

Base64& Base64::operator=

(

const Base64 &

)

[inline, private]

Definition at line 71 of file Base64.h.

{ return *this; }

---

Member Data Documentation

const char * Base64::bstr [static, private]

Initial value:

        "ABCDEFGHIJKLMNOPQ"
        "RSTUVWXYZabcdefgh"
        "ijklmnopqrstuvwxy"
        "z0123456789+/"

Definition at line 72 of file Base64.h.

Referenced by encode().

const char Base64::rstr [static, private]

Initial value:

 {
          0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0, 
          0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0, 
          0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,  62,   0,   0,   0,  63, 
         52,  53,  54,  55,  56,  57,  58,  59,  60,  61,   0,   0,   0,   0,   0,   0, 
          0,   0,   1,   2,   3,   4,   5,   6,   7,   8,   9,  10,  11,  12,  13,  14, 
         15,  16,  17,  18,  19,  20,  21,  22,  23,  24,  25,   0,   0,   0,   0,   0, 
          0,  26,  27,  28,  29,  30,  31,  32,  33,  34,  35,  36,  37,  38,  39,  40, 
         41,  42,  43,  44,  45,  46,  47,  48,  49,  50,  51,   0,   0,   0,   0,   0}

Definition at line 73 of file Base64.h.

Referenced by decode().

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The documentation for this class was generated from the following files:

• Base64.h
• Base64.cpp