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238 lines
8.2 KiB
238 lines
8.2 KiB
/*
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* $Id$
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*
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* convert/decode to/from ascii using various bases
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*
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* Copyright (C) 2008 iptelorg GmbH
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* Defines:
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* BASE64_LOOKUP_TABLE - use small lookup tables for conversions (faster
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* in general)
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*
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* History:
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* --------
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* 2008-06-11 created by andrei
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*/
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/*!
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* \file
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* \brief SIP-router core :: convert/decode to/from ascii using various bases
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* \ingroup core
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* Module: \ref core
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*/
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#include "basex.h"
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#ifdef BASE16_LOOKUP_TABLE
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#ifdef BASE16_LOOKUP_LARGE
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unsigned char _bx_hexdig_hi[256]={
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'0', '0', '0', '0', '0', '0', '0', '0',
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'0', '0', '0', '0', '0', '0', '0', '0',
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'1', '1', '1', '1', '1', '1', '1', '1',
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'1', '1', '1', '1', '1', '1', '1', '1',
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'2', '2', '2', '2', '2', '2', '2', '2',
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'2', '2', '2', '2', '2', '2', '2', '2',
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'3', '3', '3', '3', '3', '3', '3', '3',
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'3', '3', '3', '3', '3', '3', '3', '3',
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'4', '4', '4', '4', '4', '4', '4', '4',
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'4', '4', '4', '4', '4', '4', '4', '4',
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'5', '5', '5', '5', '5', '5', '5', '5',
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'5', '5', '5', '5', '5', '5', '5', '5',
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'6', '6', '6', '6', '6', '6', '6', '6',
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'6', '6', '6', '6', '6', '6', '6', '6',
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'7', '7', '7', '7', '7', '7', '7', '7',
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'7', '7', '7', '7', '7', '7', '7', '7',
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'8', '8', '8', '8', '8', '8', '8', '8',
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'8', '8', '8', '8', '8', '8', '8', '8',
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'9', '9', '9', '9', '9', '9', '9', '9',
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'9', '9', '9', '9', '9', '9', '9', '9',
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'A', 'A', 'A', 'A', 'A', 'A', 'A', 'A',
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'A', 'A', 'A', 'A', 'A', 'A', 'A', 'A',
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'B', 'B', 'B', 'B', 'B', 'B', 'B', 'B',
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'B', 'B', 'B', 'B', 'B', 'B', 'B', 'B',
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'C', 'C', 'C', 'C', 'C', 'C', 'C', 'C',
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'C', 'C', 'C', 'C', 'C', 'C', 'C', 'C',
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'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D',
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'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D',
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'E', 'E', 'E', 'E', 'E', 'E', 'E', 'E',
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'E', 'E', 'E', 'E', 'E', 'E', 'E', 'E',
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'F', 'F', 'F', 'F', 'F', 'F', 'F', 'F',
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'F', 'F', 'F', 'F', 'F', 'F', 'F', 'F'
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};
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unsigned char _bx_hexdig_low[256]={
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'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
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'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
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'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
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'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
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'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
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'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
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'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
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'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
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'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
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'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
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'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
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'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
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'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
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'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
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'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
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'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
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};
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unsigned char _bx_unhexdig256[256]={
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x01,
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0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
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0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x0a, 0x0b, 0x0c,
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0x0d, 0x0e, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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#else /* BASE16_LOOKUP_LARGE */
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unsigned char _bx_hexdig[16+1]="0123456789ABCDEF";
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unsigned char _bx_unhexdig32[32]={
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x0a, 0x0b, 0x0c,
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0x0d, 0x0e, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff };
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#endif /* BASE16_LOOKUP_LARGE */
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#endif /* BASE16_LOOKUP_TABLE */
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#ifdef BASE64_LOOKUP_TABLE
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#ifdef BASE64_LOOKUP_LARGE
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/* large lookup tables, 2.5 k */
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unsigned char _bx_b64_first[256];
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unsigned char _bx_b64_second[4][256];
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unsigned char _bx_b64_third[4][256];
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unsigned char _bx_b64_fourth[256];
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unsigned char _bx_ub64[256];
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#elif defined BASE64_LOOKUP_8K
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unsigned short _bx_b64_12[4096];
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unsigned char _bx_ub64[256];
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#else /* BASE64_LOOKUP_LARGE */
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/* very small lookup, 65 bytes */
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unsigned char _bx_b64[64+1]=
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"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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unsigned char _bx_ub64[0x54+1]={
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0x3e, 0xff, 0xff, 0xff, 0x3f,
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0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x01, 0x02,
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0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c,
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0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
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0x17, 0x18, 0x19, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1a,
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0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, 0x24,
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0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e,
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0x2f, 0x30, 0x31, 0x32, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff };
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#endif /* BASE64_LOOKUP_LARGE */
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#endif /* BASE64_LOOKUP_TABLE */
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#define b64_enc_char(c) base64_enc_char(c)
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#define b64_dec_char(c) base64_dec_char(c)
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int init_basex()
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{
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#ifdef BASE64_LOOKUP_TABLE
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#if defined BASE64_LOOKUP_LARGE || defined BASE64_LOOKUP_8K
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int r;
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#endif
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#ifdef BASE64_LOOKUP_LARGE
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int i;
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/* encode tables */
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for (r=0; r<256; r++)
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_bx_b64_first[r]=b64_enc_char(((unsigned char)r)>>2);
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for(i=0; i<4; i++){
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for (r=0; r<256; r++)
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_bx_b64_second[i][r]=
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b64_enc_char((unsigned char)((i<<4)|(r>>4)));
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}
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for(i=0; i<4; i++){
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for (r=0; r<256; r++)
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_bx_b64_third[i][r]=
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b64_enc_char((unsigned char)(((r<<2)&0x3f)|i));
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}
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for (r=0; r<256; r++)
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_bx_b64_fourth[r]=b64_enc_char(((unsigned char)r&0x3f));
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/* decode */
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for (r=0; r<256; r++)
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_bx_ub64[r]=b64_dec_char((unsigned char)r);
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#elif defined BASE64_LOOKUP_8K
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for (r=0; r< 4096; r++)
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#if defined __IS_LITTLE_ENDIAN
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_bx_b64_12[r]=b64_enc_char(r>>6)|(b64_enc_char(r&0x3f)<<8);
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#elif defined __IS_BIG_ENDIAN /* __IS_LITTLE_ENDIAN */
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_bx_b64_12[r]=(b64_enc_char(r>>6)<<8)|b64_enc_char(r&0x3f);
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#else /* __IS_LITTLE_ENDIAN */
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#error Neither __IS_LITTE_ENDIAN nor __IS_BIG_ENDIAN defined
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#endif
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/* decode */
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for (r=0; r<256; r++)
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_bx_ub64[r]=b64_dec_char((unsigned char)r);
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#endif
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#endif
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return 0;
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}
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