ftu/base64.h

/*
This is derived from the libb64 project, which has been placed in the public domain.
For details, see http://sourceforge.net/projects/libb64
*/

#ifndef BASE64_H
#define BASE64_H

#define BASE64_CHARS_PER_LINE 4
//#define BASE64_USE_NEWLINES

typedef enum
{
	step_a, step_b, step_c, step_d
} base64_decodestep;

typedef struct
{
	base64_decodestep step;
	char plainchar;
} base64_decodestate;

void base64_init_decodestate(base64_decodestate* state_in);

int base64_decode_value(char value_in);

int base64_decode_block(const char* code_in, const int length_in, char* plaintext_out, base64_decodestate* state_in);

typedef enum
{
	step_A, step_B, step_C
} base64_encodestep;

typedef struct
{
	base64_encodestep step;
	char result;
	int stepcount;
} base64_encodestate;

void base64_init_encodestate(base64_encodestate* state_in);

char base64_encode_value(char value_in);

int base64_encode_block(const char* plaintext_in, int length_in, char* code_out, base64_encodestate* state_in);

int base64_encode_blockend(char* code_out, base64_encodestate* state_in);

void base64_encode_oneshot(char* input, int input_len, char* output);
void base64_decode_oneshot(char* input, int input_len, char* output);
int base64_binlength(char* b64);
int base64_base64length(int binlength);

#endif