Add GUID type
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73f27c7cb1
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@ -15,6 +15,7 @@ UTIL_INCLUDE = \
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except.hpp \
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fixed.hpp \
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float.hpp \
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guid.hpp \
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io.hpp \
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ip.hpp \
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json.hpp \
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@ -38,6 +39,7 @@ UTIL_FILES = \
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except.cpp \
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fixed.cpp \
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float.cpp \
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guid.cpp \
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io.cpp \
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ip.cpp \
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json.cpp \
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210
guid.cpp
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210
guid.cpp
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@ -0,0 +1,210 @@
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/*
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* This file is part of libgim.
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*
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* libgim is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with libgim. If not, see <http://www.gnu.org/licenses/>.
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*
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* Copyright 2011 Danny Robson <danny@blubinc.net>
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*/
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#include "guid.hpp"
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#include "debug.hpp"
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#include "endian.hpp"
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#include "types.hpp"
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#include <algorithm>
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#include <iomanip>
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#include <sstream>
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using namespace std;
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guid::guid (uint32_t _data1,
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uint16_t _data2,
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uint16_t _data3,
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uint8_t _data4[8]):
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data1 (_data1),
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data2 (_data2),
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data3 (_data3)
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{
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copy (_data4, _data4 + elems (data4), data4);
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}
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guid::guid (void)
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{
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;
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}
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guid::guid (const char *str) {
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istringstream is (str);
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is >> *this;
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}
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guid::guid (const guid &rhs) {
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*this = rhs;
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}
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guid&
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guid::operator= (const guid &rhs) {
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data1 = rhs.data1;
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data2 = rhs.data2;
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data3 = rhs.data3;
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copy (rhs.data4 + 0, rhs.data4 + elems (rhs.data4), data4 + 0);
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return *this;
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}
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guid
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guid::from_bytes (const uint8_t *bytes) {
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guid g;
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g.data1 = *reinterpret_cast<const uint32_t *> (bytes);
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bytes += sizeof (g.data1);
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g.data2 = *reinterpret_cast<const uint16_t *> (bytes);
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bytes += sizeof (g.data2);
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g.data3 = *reinterpret_cast<const uint16_t *> (bytes);
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bytes += sizeof (g.data3);
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for (signed i = 7; i >= 0; --i) {
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g.data4[i] = *reinterpret_cast<const uint8_t *> (bytes);
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++bytes;
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}
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return g;
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}
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guid
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guid::from_string (const char *bytes)
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{ return guid (bytes); }
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guid::type
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guid::get_type (void) const {
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// Top three bits signal the type
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unsigned bits = (unsigned)data4[2] >> 5U;
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switch (bits) {
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case 0x0:
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case 0x1:
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case 0x2:
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case 0x3: return NCS_BACKWARD;
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case 0x4:
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case 0x5: return STANDARD;
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case 0x6: return COM_BACKWARD;
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case 0x7: return RESERVED;
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}
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unreachable ();
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}
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bool
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guid::operator< (const guid &rhs) const {
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if (data1 != rhs.data1)
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return data1 < rhs.data1;
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if (data2 != rhs.data2)
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return data2 < rhs.data2;
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if (data3 != rhs.data3)
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return data3 < rhs.data3;
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for (unsigned i = 0; i < elems (data4); ++i) {
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if (data4[i] == rhs.data4[i])
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return data4[i] < rhs.data4[i];
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}
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// All equal, so not less than
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return false;
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}
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bool
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guid::operator== (const guid &rhs) const {
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return data1 == rhs.data1 &&
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data2 == rhs.data2 &&
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data3 == rhs.data3 &&
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data4[0] == rhs.data4[0] &&
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data4[1] == rhs.data4[1] &&
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data4[2] == rhs.data4[2] &&
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data4[3] == rhs.data4[3] &&
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data4[4] == rhs.data4[4] &&
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data4[5] == rhs.data4[5] &&
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data4[6] == rhs.data4[6] &&
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data4[7] == rhs.data4[7];
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}
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std::ostream&
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operator<< (std::ostream &os, const guid &g) {
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uint64_t data4_b = (uint64_t)g.data4[0] << 0 |
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(uint64_t)g.data4[1] << 8 |
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(uint64_t)g.data4[2] << 16 |
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(uint64_t)g.data4[3] << 24 |
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(uint64_t)g.data4[4] << 32 |
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(uint64_t)g.data4[5] << 40;
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uint16_t data4_a = (uint16_t)g.data4[6] << 0 |
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(uint16_t)g.data4[7] << 8;
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os << hex << setfill ('0') << setw (2 * sizeof (g.data1)) << g.data1 << "-"
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<< setw (2 * sizeof (g.data2)) << g.data2 << "-"
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<< setw (2 * sizeof (g.data3)) << g.data3 << "-"
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<< setw (2 * 2) << data4_a << "-"
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<< setw (2 * 6) << data4_b;
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os << dec;
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return os;
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}
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std::istream&
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operator>> (std::istream &is, guid &g) {
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bool braces = '{' == is.peek ();
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if (braces)
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is.get ();
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uint8_t dash1, dash2, dash3, dash4a;
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uint16_t data4_a;
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uint64_t data4_b;
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is >> hex >> g.data1 >> dash1
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>> g.data2 >> dash2
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>> g.data3 >> dash3
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>> data4_a >> dash4a
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>> data4_b;
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uint64_t data4 = data4_b | (uint64_t)data4_a << 48;
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g.data4[0] = data4 & 0xFF; data4 >>= 8;
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g.data4[1] = data4 & 0xFF; data4 >>= 8;
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g.data4[2] = data4 & 0xFF; data4 >>= 8;
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g.data4[3] = data4 & 0xFF; data4 >>= 8;
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g.data4[4] = data4 & 0xFF; data4 >>= 8;
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g.data4[5] = data4 & 0xFF; data4 >>= 8;
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g.data4[6] = data4 & 0xFF; data4 >>= 8;
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g.data4[7] = data4 & 0xFF; data4 >>= 8;
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if (braces)
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is.get ();
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return is;
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}
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62
guid.hpp
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62
guid.hpp
Normal file
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@ -0,0 +1,62 @@
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/*
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* This file is part of libgim.
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*
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* libgim is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with libgim. If not, see <http://www.gnu.org/licenses/>.
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*
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* Copyright 2011 Danny Robson <danny@blubinc.net>
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*/
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#ifndef __UTIL_GUID_HPP
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#define __UTIL_GUID_HPP
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#include <cstdint>
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#include <iostream>
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class guid {
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public:
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enum type {
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NCS_BACKWARD, // 0xx: Network Computing System backward compatibility
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STANDARD, // 10x: Standard
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COM_BACKWARD, // 110: Microsoft Component Object Model backward compatibility
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RESERVED // 111: Reserved for future use
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};
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private:
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guid (void);
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public:
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guid (uint32_t, uint16_t, uint16_t, uint8_t[8]);
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guid (const char *);
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guid (const guid&);
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guid& operator= (const guid&);
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static guid from_bytes (const uint8_t *bytes);
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static guid from_string (const char *bytes);
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uint32_t data1;
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uint16_t data2;
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uint16_t data3;
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uint8_t data4[8];
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type get_type (void) const;
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bool operator< (const guid&) const;
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bool operator== (const guid&) const;
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};
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std::istream& operator>> (std::istream&, guid&);
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std::ostream& operator<< (std::ostream&, const guid&);
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#endif
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