GCOV - Varnish Cache


/*-
 * Copyright 2016 UPLEX - Nils Goroll Systemoptimierung
 * All rights reserved.
 *
 * Authors: Nils Goroll <nils.goroll@uplex.de>
 *          Geoffrey Simmons <geoffrey.simmons@uplex.de>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 *
 */

#include "config.h"

#include <ctype.h>

#include "vdef.h"
#include "vrt.h"
#include "vas.h"

#include "vmod_blob.h"

const char hex_alphabet[][16] = {
        "0123456789abcdef",
        "0123456789ABCDEF"
};

/*
 * Shift the ASCII table over so that it begins at '0', and replace the
 * hex digits with their binary values. This fits all of the hex digits
 * into 55 bytes (cacheline friendly).
 */
const uint8_t hex_nibble[] = {
        0,   1,   2,   3,   4,   5,   6,   7,   8,   9,
        ILL, ILL, ILL, ILL, ILL, ILL, ILL, 10,  11,  12,
        13,  14,  15,  ILL, ILL, ILL, ILL, ILL, ILL, ILL,
        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL, 10,
        11,  12,  13,  14,  15
};

size_t
hex_encode_l(size_t l)
{
        return ((l << 1) + 1);
}

size_t
hex_decode_l(size_t l)
{
        return ((l + 1) >> 1);
}

static inline char
hex2byte(const unsigned char hi, const unsigned char lo)
{
        return ((hex_nibble[hi - '0'] << 4) | hex_nibble[lo - '0']);
}

ssize_t
hex_encode(const enum encoding enc, const enum case_e kase,
    blob_dest_t buf, blob_len_t buflen,
    blob_src_t in, blob_len_t inlen)
{
        char *p = buf;
        const char *alphabet = hex_alphabet[0];
        size_t i;

        AN(buf);
        assert(enc == HEX);
        if (in == NULL || inlen == 0)
                return (0);
        if (buflen < hex_encode_l(inlen))
                return (-1);

        if (kase == UPPER)
                alphabet = hex_alphabet[1];

        for (i = 0; i < inlen; i++) {
                *p++ = alphabet[(in[i] & 0xf0) >> 4];
                *p++ = alphabet[in[i] & 0x0f];
        }

        return (p - buf);
}

ssize_t
hex_decode(const enum encoding dec, blob_dest_t buf,
    blob_len_t buflen, ssize_t n, VCL_STRANDS strings)
{
        char *dest = buf;
        const char *b, *s;
        unsigned char extranib = 0;
        size_t len = 0;
        int i;

        AN(buf);
        AN(strings);
        assert(dec == HEX);

        for (i = 0; i < strings->n; i++) {
                s = strings->p[i];

                if (s == NULL)
                        continue;
                b = s;
                while (*s) {
                        if (!isxdigit(*s++)) {
                                errno = EINVAL;
                                return (-1);
                        }
                }
                len += s - b;
        }

        if (len == 0)
                return (0);
        if (n >= 0 && len > (size_t)n)
                len = n;

        if (((len+1) >> 1) > buflen) {
                errno = ENOMEM;
                return (-1);
        }
        if (len & 1) {
                extranib = '0';
                len++;
        }

        for (i = 0; len > 0 && i < strings->n; i++) {
                s = strings->p[i];

                if (s == NULL || *s == '\0')
                        continue;
                if (extranib) {
                        *dest++ = hex2byte(extranib, *s++);
                        len -= 2;
                }
                while (len >= 2 && *s && *(s+1)) {
                        *dest++ = hex2byte(*s, *(s+1));
                        s += 2;
                        len -= 2;
                }
                extranib = *s;
        }
        assert(dest <= buf + buflen);
        return (dest - buf);
}

		varnish-cache/vmod/vmod_blob_hex.c
0		/*-
1		* Copyright 2016 UPLEX - Nils Goroll Systemoptimierung
2		* All rights reserved.
3		*
4		* Authors: Nils Goroll <nils.goroll@uplex.de>
5		* Geoffrey Simmons <geoffrey.simmons@uplex.de>
6		*
7		* SPDX-License-Identifier: BSD-2-Clause
8		*
9		* Redistribution and use in source and binary forms, with or without
10		* modification, are permitted provided that the following conditions are met:
11		* 1. Redistributions of source code must retain the above copyright notice,
12		* this list of conditions and the following disclaimer.
13		* 2. Redistributions in binary form must reproduce the above copyright notice,
14		* this list of conditions and the following disclaimer in the documentation
15		* and/or other materials provided with the distribution.
16		*
17		* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
18		* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19		* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20		* DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY
21		* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22		* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23		* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24		* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25		* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
26		* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27		*
28		*/
29
30		#include "config.h"
31
32		#include <ctype.h>
33
34		#include "vdef.h"
35		#include "vrt.h"
36		#include "vas.h"
37
38		#include "vmod_blob.h"
39
40		const char hex_alphabet[][16] = {
41		"0123456789abcdef",
42		"0123456789ABCDEF"
43		};
44
45		/*
46		* Shift the ASCII table over so that it begins at '0', and replace the
47		* hex digits with their binary values. This fits all of the hex digits
48		* into 55 bytes (cacheline friendly).
49		*/
50		const uint8_t hex_nibble[] = {
51		0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
52		ILL, ILL, ILL, ILL, ILL, ILL, ILL, 10, 11, 12,
53		13, 14, 15, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
54		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
55		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL, 10,
56		11, 12, 13, 14, 15
57		};
58
59		size_t
60	5199	hex_encode_l(size_t l)
61		{
62	5199	return ((l << 1) + 1);
63		}
64
65		size_t
66	2440	hex_decode_l(size_t l)
67		{
68	2440	return ((l + 1) >> 1);
69		}
70
71		static inline char
72	261720	hex2byte(const unsigned char hi, const unsigned char lo)
73		{
74	261720	return ((hex_nibble[hi - '0'] << 4) \| hex_nibble[lo - '0']);
75		}
76
77		ssize_t
78	4801	hex_encode(const enum encoding enc, const enum case_e kase,
79		blob_dest_t buf, blob_len_t buflen,
80		blob_src_t in, blob_len_t inlen)
81		{
82	4801	char *p = buf;
83	4801	const char *alphabet = hex_alphabet[0];
84		size_t i;
85
86	4801	AN(buf);
87	4801	assert(enc == HEX);
88	4801	if (in == NULL \|\| inlen == 0)
89	202	return (0);
90	4599	if (buflen < hex_encode_l(inlen))
91	40	return (-1);
92
93	4559	if (kase == UPPER)
94	1240	alphabet = hex_alphabet[1];
95
96	307725	for (i = 0; i < inlen; i++) {
97	303166	*p++ = alphabet[(in[i] & 0xf0) >> 4];
98	303166	*p++ = alphabet[in[i] & 0x0f];
99	303166	}
100
101	4559	return (p - buf);
102	4799	}
103
104		ssize_t
105	4920	hex_decode(const enum encoding dec, blob_dest_t buf,
106		blob_len_t buflen, ssize_t n, VCL_STRANDS strings)
107		{
108	4920	char *dest = buf;
109		const char b, s;
110	4920	unsigned char extranib = 0;
111	4920	size_t len = 0;
112		int i;
113
114	4920	AN(buf);
115	4920	AN(strings);
116	4920	assert(dec == HEX);
117
118	12160	for (i = 0; i < strings->n; i++) {
119	7440	s = strings->p[i];
120
121	7440	if (s == NULL)
122	960	continue;
123	6480	b = s;
124	920040	while (*s) {
125	913760	if (!isxdigit(*s++)) {
126	200	errno = EINVAL;
127	200	return (-1);
128		}
129		}
130	6280	len += s - b;
131	6280	}
132
133	4720	if (len == 0)
134	240	return (0);
135	4480	if (n >= 0 && len > (size_t)n)
136	1440	len = n;
137
138	4480	if (((len+1) >> 1) > buflen) {
139	40	errno = ENOMEM;
140	40	return (-1);
141		}
142	4440	if (len & 1) {
143	520	extranib = '0';
144	520	len++;
145	520	}
146
147	10760	for (i = 0; len > 0 && i < strings->n; i++) {
148	6320	s = strings->p[i];
149
150	6320	if (s == NULL \|\| *s == '\0')
151	1280	continue;
152	5040	if (extranib) {
153	1000	dest++ = hex2byte(extranib, s++);
154	1000	len -= 2;
155	1000	}
156	265760	while (len >= 2 && s && (s+1)) {
157	260720	dest++ = hex2byte(s, *(s+1));
158	260720	s += 2;
159	260720	len -= 2;
160		}
161	5040	extranib = *s;
162	5040	}
163	4440	assert(dest <= buf + buflen);
164	4440	return (dest - buf);
165	4920	}