base64.h

#ifndef __BASE64_H__
#define __BASE64_H__

#include <stdio.h>
#include <stdlib.h>

static const char cb64[]="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
static const char cd64[]="|$$$}rstuvwxyz{$$$$$$$>?@ABCDEFGHIJKLMNOPQRSTUVW$$$$$$XYZ[\\]^_`abcdefghijklmnopq";

#define B64_SYNTAX_ERROR        1
#define B64_FILE_ERROR          2
#define B64_FILE_IO_ERROR       3
#define B64_ERROR_OUT_CLOSE     4
#define B64_LINE_SIZE_TO_MIN    5
#define B64_SYNTAX_TOOMANYARGS  6

/*
** b64_message
**
** Gather text messages in one place.
**
*/
#define B64_MAX_MESSAGES 7
static char *b64_msgs[ B64_MAX_MESSAGES ] = {
            "b64:000:Invalid Message Code.",
            "b64:001:Syntax Error -- check help (-h) for usage.",
            "b64:002:File Error Opening/Creating Files.",
            "b64:003:File I/O Error -- Note: output file not removed.",
            "b64:004:Error on output file close.",
            "b64:005:linesize set to minimum.",
            "b64:006:Syntax: Too many arguments."
};

#define b64_message( ec ) ((ec > 0 && ec < B64_MAX_MESSAGES ) ? b64_msgs[ ec ] : b64_msgs[ 0 ])


int encode( FILE *infile, FILE *outfile, int linesize );
void decodeblock( unsigned char *in, unsigned char *out );
int decode( FILE *infile, FILE *outfile );
int b64( char opt, char *infilename, char *outfilename, int linesize );


#endif /* __BASE_H__ */