b64.h

mediastreamer2是开源的网络传输媒体流的库

/* /////////////////////////////////////////////////////////////////////////////
 * File:        b64/b64.h
 *
 * Purpose:     Header file for the b64 library
 *
 * Created:     18th October 2004
 * Updated:     24th August 2008
 *
 * Thanks:      To Adam McLaurin, for ideas regarding the b64_decode2() and
 *              b64_encode2().
 *
 * Home:        http://synesis.com.au/software/
 *
 * Copyright (c) 2004-2008, Matthew Wilson and Synesis Software
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * - Neither the name(s) of Matthew Wilson and Synesis Software nor the names of
 *   any contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * ////////////////////////////////////////////////////////////////////////// */


/** \file b64/b64.h
 *
 * \brief [C/C++] Header file for the b64 library.
 */

#ifndef B64_INCL_B64_H_B64
#define B64_INCL_B64_H_B64

/* /////////////////////////////////////////////////////////////////////////////
 * Version information
 */

#ifndef B64_DOCUMENTATION_SKIP_SECTION
# define B64_VER_B64_H_B64_MAJOR    1
# define B64_VER_B64_H_B64_MINOR    5
# define B64_VER_B64_H_B64_REVISION 4
# define B64_VER_B64_H_B64_EDIT     28
#endif /* !B64_DOCUMENTATION_SKIP_SECTION */

/** \def B64_VER_MAJOR
 * The major version number of b64
 */

/** \def B64_VER_MINOR
 * The minor version number of b64
 */

/** \def B64_VER_REVISION
 * The revision version number of b64
 */

/** \def B64_VER
 * The current composite version number of b64
 */

#ifndef B64_DOCUMENTATION_SKIP_SECTION
# define B64_VER_1_0_1      0x01000100
# define B64_VER_1_0_2      0x01000200
# define B64_VER_1_0_3      0x01000300
# define B64_VER_1_1_1      0x01010100
# define B64_VER_1_1_2      0x01010200
# define B64_VER_1_1_3      0x01010300
# define B64_VER_1_2_1      0x01020100
# define B64_VER_1_2_2      0x01020200
# define B64_VER_1_2_3      0x01020300
# define B64_VER_1_2_4      0x01020400
# define B64_VER_1_2_5      0x01020500
# define B64_VER_1_2_6      0x01020600
# define B64_VER_1_2_7      0x01020700
# define B64_VER_1_3_1      0x010301ff
# define B64_VER_1_3_2      0x010302ff
# define B64_VER_1_3_3      0x010303ff
# define B64_VER_1_3_4      0x010304ff

# define B64_VER            B64_VER_1_3_4
#else /* ? B64_DOCUMENTATION_SKIP_SECTION */
# define B64_VER            0x010304ff
#endif /* !B64_DOCUMENTATION_SKIP_SECTION */

#define B64_VER_MAJOR       1
#define B64_VER_MINOR       3
#define B64_VER_REVISION    4

/* /////////////////////////////////////////////////////////////////////////////
 * Includes
 */

#include <stddef.h>

/* /////////////////////////////////////////////////////////////////////////////
 * Namespace
 */

#if !defined(B64_NO_NAMESPACE) && \
    !defined(__cplusplus)
# define B64_NO_NAMESPACE
#endif /* !B64_NO_NAMESPACE && !__cplusplus */

#ifdef B64_NAMESPACE
# undef B64_NAMESPACE
#endif /* B64_NAMESPACE */

#ifdef B64_NAMESPACE_QUALIFIER
# undef B64_NAMESPACE_QUALIFIER
#endif /* B64_NAMESPACE_QUALIFIER */


#ifndef B64_NO_NAMESPACE

# ifdef B64_CUSTOM_NAMESPACE
#  define B64_NAMESPACE     B64_CUSTOM_NAMESPACE
# else /* ? B64_CUSTOM_NAMESPACE */
#  define B64_NAMESPACE     b64
# endif /* B64_CUSTOM_NAMESPACE */

# if defined(B64_CUSTOM_NAMESPACE) && \
     defined(B64_CUSTOM_NAMESPACE_QUALIFIER)
#  define B64_NAMESPACE_QUALIFIER       B64_CUSTOM_NAMESPACE_QUALIFIER
# else /* B64_CUSTOM_NAMESPACE && B64_CUSTOM_NAMESPACE_QUALIFIER */
#  define B64_NAMESPACE_QUALIFIER       ::B64_NAMESPACE
# endif /* B64_CUSTOM_NAMESPACE && B64_CUSTOM_NAMESPACE_QUALIFIER */


/** \brief [C/C++] The b64 namespace, within which the core library types and functions
 * reside in C++ compilation. In C compilation, they all reside in the global
 * namespace.
 *
 * \htmlonly
 * <hr>
 * \endhtmlonly
 */
namespace B64_NAMESPACE
{
#endif /* !B64_NO_NAMESPACE */

/* /////////////////////////////////////////////////////////////////////////////
 * Enumerations
 */

/** \brief Return codes (from b64_encode2() / b64_decode2())
 */
enum B64_RC
{
        B64_RC_OK                   =   0   /*!< Operation was successful. */
    ,   B64_RC_INSUFFICIENT_BUFFER  =   1   /*!< The given translation buffer was not of sufficient size. */
    ,   B64_RC_TRUNCATED_INPUT      =   2   /*!< The input did not represent a fully formed stream of octet couplings. */
    ,   B64_RC_DATA_ERROR           =   3   /*!< Invalid data. */
#ifndef B64_DOCUMENTATION_SKIP_SECTION
    ,   B64_max_RC_value
#endif /* !B64_DOCUMENTATION_SKIP_SECTION */
};

#ifndef __cplusplus
typedef enum B64_RC B64_RC;
#endif /* !__cplusplus */

/** \brief Coding behaviour modification flags (for b64_encode2() / b64_decode2())
 */
enum B64_FLAGS
{
        B64_F_LINE_LEN_USE_PARAM    =   0x0000  /*!< Uses the lineLen parameter to b64_encode2(). Ignored by b64_decode2(). */
    ,   B64_F_LINE_LEN_INFINITE     =   0x0001  /*!< Ignores the lineLen parameter to b64_encode2(). Line length is infinite. Ignored by b64_decode2(). */
    ,   B64_F_LINE_LEN_64           =   0x0002  /*!< Ignores the lineLen parameter to b64_encode2(). Line length is 64. Ignored by b64_decode2(). */
    ,   B64_F_LINE_LEN_76           =   0x0003  /*!< Ignores the lineLen parameter to b64_encode2(). Line length is 76. Ignored by b64_decode2(). */
    ,   B64_F_LINE_LEN_MASK         =   0x000f  /*!< Mask for testing line length flags to b64_encode2(). Ignored by b64_encode2(). */
    ,   B64_F_STOP_ON_NOTHING       =   0x0000  /*!< Decoding ignores all invalid characters in the input data. Ignored by b64_encode2(). */
    ,   B64_F_STOP_ON_UNKNOWN_CHAR  =   0x0100  /*!< Causes decoding to break if any non-Base-64 [a-zA-Z0-9=+/], non-whitespace character is encountered. Ignored by b64_encode2(). */
    ,   B64_F_STOP_ON_UNEXPECTED_WS =   0x0200  /*!< Causes decoding to break if any unexpected whitespace is encountered. Ignored by b64_encode2(). */
    ,   B64_F_STOP_ON_BAD_CHAR      =   0x0300  /*!< Causes decoding to break if any non-Base-64 [a-zA-Z0-9=+/] character is encountered. Ignored by b64_encode2(). */
};

#ifndef __cplusplus
typedef enum B64_FLAGS  B64_FLAGS;
#endif /* !__cplusplus */

/* /////////////////////////////////////////////////////////////////////////////
 * Functions
 */

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

/** \brief Encodes a block of binary data into Base-64
 *
 * \param src Pointer to the block to be encoded. May not be NULL, except when
 *   \c dest is NULL, in which case it is ignored.
 * \param srcSize Length of block to be encoded