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File: [Pegasus] / pegasus / src / Pegasus / Common / Base64.cpp
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Revision: 1.29, Tue Dec 2 09:00:42 2008 UTC (15 years, 6 months ago) by martin Branch: MAIN CVS Tags: preBug9676, postBug9676, TASK_PEP317_1JUNE_2013, TASK-TASK_PEP362_RestfulService_branch-root, TASK-TASK_PEP362_RestfulService_branch-merged_out_from_trunk, TASK-TASK_PEP362_RestfulService_branch-merged_in_to_trunk, TASK-TASK_PEP362_RestfulService_branch-merged_in_from_branch, TASK-TASK_PEP362_RestfulService_branch-branch, TASK-PEP362_RestfulService-root, TASK-PEP362_RestfulService-merged_out_to_branch, TASK-PEP362_RestfulService-merged_out_from_trunk, TASK-PEP362_RestfulService-merged_in_to_trunk, TASK-PEP362_RestfulService-merged_in_from_branch, TASK-PEP362_RestfulService-branch, TASK-PEP348_SCMO-root, TASK-PEP348_SCMO-merged_out_to_branch, TASK-PEP348_SCMO-merged_out_from_trunk, TASK-PEP348_SCMO-merged_in_to_trunk, TASK-PEP348_SCMO-merged_in_from_branch, TASK-PEP348_SCMO-branch, TASK-PEP317_pullop-root, TASK-PEP317_pullop-merged_out_to_branch, TASK-PEP317_pullop-merged_out_from_trunk, TASK-PEP317_pullop-merged_in_to_trunk, TASK-PEP317_pullop-merged_in_from_branch, TASK-PEP317_pullop-branch, RELEASE_2_9_2-RC2, RELEASE_2_9_2-RC1, RELEASE_2_9_2, RELEASE_2_9_1-RC1, RELEASE_2_9_1, RELEASE_2_9_0-RC1, RELEASE_2_9_0-FC, RELEASE_2_9_0, RELEASE_2_9-root, RELEASE_2_9-branch, RELEASE_2_14_1, RELEASE_2_14_0-RC2, RELEASE_2_14_0-RC1, RELEASE_2_14_0, RELEASE_2_14-root, RELEASE_2_14-branch, RELEASE_2_13_0-RC2, RELEASE_2_13_0-RC1, RELEASE_2_13_0-FC, RELEASE_2_13_0, RELEASE_2_13-root, RELEASE_2_13-branch, RELEASE_2_12_1-RC1, RELEASE_2_12_1, RELEASE_2_12_0-RC1, RELEASE_2_12_0-FC, RELEASE_2_12_0, RELEASE_2_12-root, RELEASE_2_12-branch, RELEASE_2_11_2-RC1, RELEASE_2_11_2, RELEASE_2_11_1-RC1, RELEASE_2_11_1, RELEASE_2_11_0-RC1, RELEASE_2_11_0-FC, RELEASE_2_11_0, RELEASE_2_11-root, RELEASE_2_11-branch, RELEASE_2_10_1-RC1, RELEASE_2_10_1, RELEASE_2_10_0-RC2, RELEASE_2_10_0-RC1, RELEASE_2_10_0, RELEASE_2_10-root, RELEASE_2_10-branch, PREAUG25UPDATE, POSTAUG25UPDATE, HPUX_TEST, HEAD, CIMRS_WORK_20130824, BeforeUpdateToHeadOct82011 Changes since 1.28: +6 -6 lines BUG#: 8123 TITLE: Update copyright/license text DESCRIPTION: Fixing trailing spaces in copyright/license text |
//%LICENSE//////////////////////////////////////////////////////////////// // // Licensed to The Open Group (TOG) under one or more contributor license // agreements. Refer to the OpenPegasusNOTICE.txt file distributed with // this work for additional information regarding copyright ownership. // Each contributor licenses this file to you under the OpenPegasus Open // Source License; you may not use this file except in compliance with the // License. // // Permission is hereby granted, free of charge, to any person obtaining a // copy of this software and associated documentation files (the "Software"), // to deal in the Software without restriction, including without limitation // the rights to use, copy, modify, merge, publish, distribute, sublicense, // and/or sell copies of the Software, and to permit persons to whom the // Software is furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included // in all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. // IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY // CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, // TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE // SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. // ////////////////////////////////////////////////////////////////////////// // //%///////////////////////////////////////////////////////////////////////////// #include "Base64.h" #include <Pegasus/Common/ArrayInternal.h> PEGASUS_NAMESPACE_BEGIN PEGASUS_USING_STD; #ifdef PEGASUS_PLATFORM_AIX_RS_IBMCXX #define inline #endif //********************************************************** /* Encode thanslates one six-bit pattern into a base-64 character. Unsigned char is used to represent a six-bit stream of date. */ inline PEGASUS_COMMON_LINKAGE char Base64::_Encode(Uint8 uc) { if (uc < 26) return 'A'+uc; if (uc < 52) return 'a'+(uc-26); if (uc < 62) return '0'+(uc-52); if (uc == 62) return '+'; return '/'; } // Helper function returns true is a character is a valid base-64 character // and false otherwise. inline Boolean Base64::_IsBase64(char c) { if (c >= 'A' && c <= 'Z') return true; if (c >= 'a' && c <= 'z') return true; if (c >= '0' && c <= '9') return true; if (c == '+') return true; if (c == '/') return true; if (c == '=') return true; return false; } // Translate one base-64 character into a six bit pattern inline Uint8 Base64::_Decode(char c) { if (c >= 'A' && c <= 'Z') return c - 'A'; if (c >= 'a' && c <= 'z') return c - 'a' + 26; if (c >= '0' && c <= '9') return c - '0' + 52; if (c == '+') return 62; return 63; } //************************************************************* /* Encode static method takes an array of 8-bit values and returns a base-64 stream. ATTN: KS feb 2002 - This is probably a very slow an inefficient implementation and could be improved if it is required for production. Today it is only for test programs. */ Buffer Base64::encode(const Buffer& vby) { Buffer retArray; // If nothing in input string, return empty string if (vby.size() == 0) return retArray; // for every character in the input array taken 3 bytes at a time for (Uint32 i=0; i < vby.size(); i+=3) { // Create from 3 8 bit values to 4 6 bit values Uint8 by1=0,by2=0,by3=0; by1 = vby[i]; if (i+1<vby.size()) { by2 = vby[i+1]; }; if (i+2<vby.size()) { by3 = vby[i+2]; } Uint8 by4=0,by5=0,by6=0,by7=0; by4 = by1>>2; by5 = ((by1&0x3)<<4)|(by2>>4); by6 = ((by2&0xf)<<2)|(by3>>6); by7 = by3&0x3f; retArray.append(_Encode(by4)); retArray.append(_Encode(by5)); if (i+1<vby.size()) retArray.append( _Encode(by6)); else retArray.append('='); if (i+2<vby.size()) retArray.append( _Encode(by7)); else retArray.append('='); /* ATTN: Need to fix this. It adds unwanted cr-lf after 4 chars. if (i % (76/4*3) == 0) { retArray.append( '\r'); retArray.append( '\n'); } */ }; return retArray; } /* I checked for the zero length. The algorithm would also work for zero length input stream, but I’m pretty adamant about handling border conditions. They are often the culprits of run-time production failures. The algorithm goes thru each three bytes of data at a time. The first thing I do is to shift the bits around from three 8-bit values to four 6-bit values. Then I encode the 6-bit values and add then one at a time to the output stream. This is actually quite inefficient. The STL character array is being allocated one byte at a time. The algorithm would be much faster, if I pre-allocated that array. I’ll leave that as an optimization practical exercise for the reader. */ /* The decode static method takes a base-64 stream and converts it to an array of 8-bit values. */ Buffer Base64::decode(const Buffer& strInput) { //Strip any non-base64 characters from the input Buffer str; for (Uint32 j=0;j<strInput.size();j++) { if (_IsBase64(strInput[j])) str.append(strInput[j]); } Buffer retArray; // Return if the input is zero length if (str.size() == 0) return retArray; // comment for (Uint32 i=0; i < str.size(); i+=4) { char c1='A',c2='A',c3='A',c4='A'; c1 = str[i]; if (i+1<str.size()) c2 = str[i+1]; if (i+2<str.size()) c3 = str[i+2]; if (i+3<str.size()) c4 = str[i+3]; Uint8 by1=0,by2=0,by3=0,by4=0; by1 = _Decode(c1); by2 = _Decode(c2); by3 = _Decode(c3); by4 = _Decode(c4); //cout << "base::64decode bytes" << // " 1 " << c1 << " " << by1 << // " 2 " << c2 << " " << by2 << // " 3 " << c3 << " " << by3 << // " 4 " << c4 << " " << by4 << endl; // append first byte by shifting retArray.append( static_cast<char>((by1<<2)|(by2>>4)) ); // append second byte if not padding if (c3 != '=') retArray.append( static_cast<char>(((by2&0xf)<<4)|(by3>>2)) ); if (c4 != '=') retArray.append( static_cast<char>(((by3&0x3)<<6)|by4) ); } return retArray; } PEGASUS_NAMESPACE_END
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