/usr/include/wx-3.0/wx/base64.h is in wx3.0-headers 3.0.4+dfsg-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Name: wx/base64.h
// Purpose: declaration of BASE64 encoding/decoding functionality
// Author: Charles Reimers, Vadim Zeitlin
// Created: 2007-06-18
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _WX_BASE64_H_
#define _WX_BASE64_H_
#if wxUSE_BASE64
#include "wx/string.h"
#include "wx/buffer.h"
// ----------------------------------------------------------------------------
// encoding functions
// ----------------------------------------------------------------------------
// return the size needed for the buffer containing the encoded representation
// of a buffer of given length
inline size_t wxBase64EncodedSize(size_t len) { return 4*((len+2)/3); }
// raw base64 encoding function which encodes the contents of a buffer of the
// specified length into the buffer of the specified size
//
// returns the length of the encoded data or wxCONV_FAILED if the buffer is not
// large enough; to determine the needed size you can either allocate a buffer
// of wxBase64EncodedSize(srcLen) size or call the function with NULL buffer in
// which case the required size will be returned
WXDLLIMPEXP_BASE size_t
wxBase64Encode(char *dst, size_t dstLen, const void *src, size_t srcLen);
// encode the contents of the given buffer using base64 and return as string
// (there is no error return)
inline wxString wxBase64Encode(const void *src, size_t srcLen)
{
const size_t dstLen = wxBase64EncodedSize(srcLen);
wxCharBuffer dst(dstLen);
wxBase64Encode(dst.data(), dstLen, src, srcLen);
return dst;
}
inline wxString wxBase64Encode(const wxMemoryBuffer& buf)
{
return wxBase64Encode(buf.GetData(), buf.GetDataLen());
}
// ----------------------------------------------------------------------------
// decoding functions
// ----------------------------------------------------------------------------
// elements of this enum specify the possible behaviours of wxBase64Decode()
// when an invalid character is encountered
enum wxBase64DecodeMode
{
// normal behaviour: stop at any invalid characters
wxBase64DecodeMode_Strict,
// skip whitespace characters
wxBase64DecodeMode_SkipWS,
// the most lenient behaviour: simply ignore all invalid characters
wxBase64DecodeMode_Relaxed
};
// return the buffer size necessary for decoding a base64 string of the given
// length
inline size_t wxBase64DecodedSize(size_t srcLen) { return 3*srcLen/4; }
// raw decoding function which decodes the contents of the string of specified
// length (or NUL-terminated by default) into the provided buffer of the given
// size
//
// the function normally stops at any character invalid inside a base64-encoded
// string (i.e. not alphanumeric nor '+' nor '/') but can be made to skip the
// whitespace or all invalid characters using its mode argument
//
// returns the length of the decoded data or wxCONV_FAILED if an error occurs
// such as the buffer is too small or the encoded string is invalid; in the
// latter case the posErr is filled with the position where the decoding
// stopped if it is not NULL
WXDLLIMPEXP_BASE size_t
wxBase64Decode(void *dst, size_t dstLen,
const char *src, size_t srcLen = wxNO_LEN,
wxBase64DecodeMode mode = wxBase64DecodeMode_Strict,
size_t *posErr = NULL);
inline size_t
wxBase64Decode(void *dst, size_t dstLen,
const wxString& src,
wxBase64DecodeMode mode = wxBase64DecodeMode_Strict,
size_t *posErr = NULL)
{
// don't use str.length() here as the ASCII buffer is shorter than it for
// strings with embedded NULs
return wxBase64Decode(dst, dstLen, src.ToAscii(), wxNO_LEN, mode, posErr);
}
// decode the contents of the given string; the returned buffer is empty if an
// error occurs during decoding
WXDLLIMPEXP_BASE wxMemoryBuffer
wxBase64Decode(const char *src, size_t srcLen = wxNO_LEN,
wxBase64DecodeMode mode = wxBase64DecodeMode_Strict,
size_t *posErr = NULL);
inline wxMemoryBuffer
wxBase64Decode(const wxString& src,
wxBase64DecodeMode mode = wxBase64DecodeMode_Strict,
size_t *posErr = NULL)
{
// don't use str.length() here as the ASCII buffer is shorter than it for
// strings with embedded NULs
return wxBase64Decode(src.ToAscii(), wxNO_LEN, mode, posErr);
}
#endif // wxUSE_BASE64
#endif // _WX_BASE64_H_
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