/src/mozilla-central/gfx/graphite2/src/inc/Endian.h

Source (jump to first uncovered line)
/*  GRAPHITE2 LICENSING

    Copyright 2011, SIL International
    All rights reserved.

    This library is free software; you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published
    by the Free Software Foundation; either version 2.1 of License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should also have received a copy of the GNU Lesser General Public
    License along with this library in the file named "LICENSE".
    If not, write to the Free Software Foundation, 51 Franklin Street,
    Suite 500, Boston, MA 02110-1335, USA or visit their web page on the
    internet at http://www.fsf.org/licenses/lgpl.html.

Alternatively, the contents of this file may be used under the terms of the
Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public
License, as published by the Free Software Foundation, either version 2
of the License or (at your option) any later version.
*/

/*
Description:
    A set of fast template based decoders for decoding values of any C integer
    type up to long int size laid out with most significant byte first or least
    significant byte first (aka big endian or little endian).  These are CPU
    byte order agnostic and will function the same regardless of the CPUs native
    byte order.

    Being template based means if the either le or be class is not used then
    template code of unused functions will not be instantiated by the compiler
    and thus shouldn't cause any overhead.
*/

#include <cstddef>

#pragma once


class be
{
    template<int S>
    inline static unsigned long int _peek(const unsigned char * p) {
        return _peek<S/2>(p) << (S/2)*8 | _peek<S/2>(p+S/2);
    }
public:
    template<typename T>
    inline static T peek(const void * p) {
        return T(_peek<sizeof(T)>(static_cast<const unsigned char *>(p)));
    }

    template<typename T>
    inline static T read(const unsigned char * &p) {
        const T r = T(_peek<sizeof(T)>(p));
        p += sizeof r;
        return r;
    }

    template<typename T>
    inline static T swap(const T x) {
        return T(_peek<sizeof(T)>(reinterpret_cast<const unsigned char *>(&x)));
    }

    template<typename T>
    inline static void skip(const unsigned char * &p, size_t n=1) {
        p += sizeof(T)*n;
    }
};

template<>
inline unsigned long int be::_peek<1>(const unsigned char * p) { return *p; }


class le
{
    template<int S>
    inline static unsigned long int _peek(const unsigned char * p) {
        return _peek<S/2>(p) | _peek<S/2>(p+S/2)  << (S/2)*8;
    }
public:
    template<typename T>
    inline static T peek(const void * p) {
        return T(_peek<sizeof(T)>(static_cast<const unsigned char *>(p)));
    }

    template<typename T>
    inline static T read(const unsigned char * &p) {
        const T r = T(_peek<sizeof(T)>(p));
        p += sizeof r;
        return r;
    }

    template<typename T>
    inline static T swap(const T x) {
        return T(_peek<sizeof(T)>(reinterpret_cast<const unsigned char *>(&x)));
    }

    template<typename T>
    inline static void skip(const unsigned char * &p, size_t n=1) {
        p += sizeof(T)*n;
    }
};

template<>
inline unsigned long int le::_peek<1>(const unsigned char * p) { return *p; }

Line	Count	Source (jump to first uncovered line)
1		/* GRAPHITE2 LICENSING
2
3		Copyright 2011, SIL International
4		All rights reserved.
5
6		This library is free software; you can redistribute it and/or modify
7		it under the terms of the GNU Lesser General Public License as published
8		by the Free Software Foundation; either version 2.1 of License, or
9		(at your option) any later version.
10
11		This program is distributed in the hope that it will be useful,
12		but WITHOUT ANY WARRANTY; without even the implied warranty of
13		MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14		Lesser General Public License for more details.
15
16		You should also have received a copy of the GNU Lesser General Public
17		License along with this library in the file named "LICENSE".
18		If not, write to the Free Software Foundation, 51 Franklin Street,
19		Suite 500, Boston, MA 02110-1335, USA or visit their web page on the
20		internet at http://www.fsf.org/licenses/lgpl.html.
21
22		Alternatively, the contents of this file may be used under the terms of the
23		Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public
24		License, as published by the Free Software Foundation, either version 2
25		of the License or (at your option) any later version.
26		*/
27
28		/*
29		Description:
30		A set of fast template based decoders for decoding values of any C integer
31		type up to long int size laid out with most significant byte first or least
32		significant byte first (aka big endian or little endian). These are CPU
33		byte order agnostic and will function the same regardless of the CPUs native
34		byte order.
35
36		Being template based means if the either le or be class is not used then
37		template code of unused functions will not be instantiated by the compiler
38		and thus shouldn't cause any overhead.
39		*/
40
41		#include <cstddef>
42
43		#pragma once
44
45
46		class be
47		{
48		template<int S>
49	0	inline static unsigned long int _peek(const unsigned char * p) {
50	0	return _peek<S/2>(p) << (S/2)*8 \| _peek<S/2>(p+S/2);
51	0	} Unexecuted instantiation: unsigned long be::_peek<2>(unsigned char const) Unexecuted instantiation: unsigned long be::_peek<4>(unsigned char const)
52		public:
53		template<typename T>
54	0	inline static T peek(const void * p) {
55	0	return T(_peek<sizeof(T)>(static_cast<const unsigned char *>(p)));
56	0	} Unexecuted instantiation: unsigned int be::peek<unsigned int>(void const) Unexecuted instantiation: unsigned short be::peek<unsigned short>(void const) Unexecuted instantiation: unsigned char be::peek<unsigned char>(void const) Unexecuted instantiation: short be::peek<short>(void const)
57
58		template<typename T>
59	0	inline static T read(const unsigned char * &p) {
60	0	const T r = T(_peek<sizeof(T)>(p));
61	0	p += sizeof r;
62	0	return r;
63	0	} Unexecuted instantiation: unsigned short be::read<unsigned short>(unsigned char const&) Unexecuted instantiation: short be::read<short>(unsigned char const&) Unexecuted instantiation: unsigned int be::read<unsigned int>(unsigned char const&) Unexecuted instantiation: unsigned char be::read<unsigned char>(unsigned char const&)
64
65		template<typename T>
66	0	inline static T swap(const T x) {
67	0	return T(_peek<sizeof(T)>(reinterpret_cast<const unsigned char *>(&x)));
68	0	} Unexecuted instantiation: unsigned short be::swap<unsigned short>(unsigned short) Unexecuted instantiation: unsigned int be::swap<unsigned int>(unsigned int) Unexecuted instantiation: int be::swap<int>(int) Unexecuted instantiation: short be::swap<short>(short)
69
70		template<typename T>
71	0	inline static void skip(const unsigned char * &p, size_t n=1) {
72	0	p += sizeof(T)*n;
73	0	} Unexecuted instantiation: void be::skip<unsigned int>(unsigned char const&, unsigned long) Unexecuted instantiation: void be::skip<unsigned short>(unsigned char const&, unsigned long) Unexecuted instantiation: void be::skip<unsigned char>(unsigned char const&, unsigned long) Unexecuted instantiation: void be::skip<short>(unsigned char const&, unsigned long) Unexecuted instantiation: void be::skip<int>(unsigned char const*&, unsigned long)
74		};
75
76		template<>
77	0	inline unsigned long int be::_peek<1>(const unsigned char * p) { return *p; }
78
79
80		class le
81		{
82		template<int S>
83		inline static unsigned long int _peek(const unsigned char * p) {
84		return _peek<S/2>(p) \| _peek<S/2>(p+S/2) << (S/2)*8;
85		}
86		public:
87		template<typename T>
88		inline static T peek(const void * p) {
89		return T(_peek<sizeof(T)>(static_cast<const unsigned char *>(p)));
90		}
91
92		template<typename T>
93		inline static T read(const unsigned char * &p) {
94		const T r = T(_peek<sizeof(T)>(p));
95		p += sizeof r;
96		return r;
97		}
98
99		template<typename T>
100		inline static T swap(const T x) {
101		return T(_peek<sizeof(T)>(reinterpret_cast<const unsigned char *>(&x)));
102		}
103
104		template<typename T>
105		inline static void skip(const unsigned char * &p, size_t n=1) {
106		p += sizeof(T)*n;
107		}
108		};
109
110		template<>
111	0	inline unsigned long int le::_peek<1>(const unsigned char * p) { return *p; }

Coverage Report

Created: 2018-09-25 14:53