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 "miniobj.h"

#include "vmod_blob.h"

const char hex_alphabet[][17] = {
        "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);
        CHECK_OBJ_NOTNULL(strings, STRANDS_MAGIC);
        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		#include "miniobj.h"
38
39		#include "vmod_blob.h"
40
41		const char hex_alphabet[][17] = {
42		"0123456789abcdef",
43		"0123456789ABCDEF"
44		};
45
46		/*
47		* Shift the ASCII table over so that it begins at '0', and replace the
48		* hex digits with their binary values. This fits all of the hex digits
49		* into 55 bytes (cacheline friendly).
50		*/
51		const uint8_t hex_nibble[] = {
52		0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
53		ILL, ILL, ILL, ILL, ILL, ILL, ILL, 10, 11, 12,
54		13, 14, 15, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
55		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
56		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL, 10,
57		11, 12, 13, 14, 15
58		};
59
60		size_t
61	130	hex_encode_l(size_t l)
62		{
63	130	return ((l << 1) + 1);
64		}
65
66		size_t
67	61	hex_decode_l(size_t l)
68		{
69	61	return ((l + 1) >> 1);
70		}
71
72		static inline char
73	6607	hex2byte(const unsigned char hi, const unsigned char lo)
74		{
75	6607	return ((hex_nibble[hi - '0'] << 4) \| hex_nibble[lo - '0']);
76		}
77
78		ssize_t
79	120	hex_encode(const enum encoding enc, const enum case_e kase,
80		blob_dest_t buf, blob_len_t buflen,
81		blob_src_t in, blob_len_t inlen)
82		{
83	120	char *p = buf;
84	120	const char *alphabet = hex_alphabet[0];
85		size_t i;
86
87	120	AN(buf);
88	120	assert(enc == HEX);
89	120	if (in == NULL \|\| inlen == 0)
90	5	return (0);
91	115	if (buflen < hex_encode_l(inlen))
92	1	return (-1);
93
94	114	if (kase == UPPER)
95	31	alphabet = hex_alphabet[1];
96
97	7704	for (i = 0; i < inlen; i++) {
98	7590	*p++ = alphabet[(in[i] & 0xf0) >> 4];
99	7590	*p++ = alphabet[in[i] & 0x0f];
100	7590	}
101
102	114	return (p - buf);
103	120	}
104
105		ssize_t
106	125	hex_decode(const enum encoding dec, blob_dest_t buf,
107		blob_len_t buflen, ssize_t n, VCL_STRANDS strings)
108		{
109	125	char *dest = buf;
110		const char b, s;
111	125	unsigned char extranib = 0;
112	125	size_t len = 0;
113		int i;
114
115	125	AN(buf);
116	125	CHECK_OBJ_NOTNULL(strings, STRANDS_MAGIC);
117	125	assert(dec == HEX);
118
119	308	for (i = 0; i < strings->n; i++) {
120	188	s = strings->p[i];
121
122	188	if (s == NULL)
123	24	continue;
124	164	b = s;
125	23131	while (*s) {
126	22972	if (!isxdigit(*s++)) {
127	5	errno = EINVAL;
128	5	return (-1);
129		}
130		}
131	159	len += s - b;
132	159	}
133
134	120	if (len == 0)
135	6	return (0);
136	114	if (n >= 0 && len > (size_t)n)
137	36	len = n;
138
139	114	if (((len+1) >> 1) > buflen) {
140	1	errno = ENOMEM;
141	1	return (-1);
142		}
143	113	if (len & 1) {
144	13	extranib = '0';
145	13	len++;
146	13	}
147
148	273	for (i = 0; len > 0 && i < strings->n; i++) {
149	160	s = strings->p[i];
150
151	160	if (s == NULL \|\| *s == '\0')
152	32	continue;
153	128	if (extranib) {
154	25	dest++ = hex2byte(extranib, s++);
155	25	len -= 2;
156	25	}
157	6710	while (len >= 2 && s && (s+1)) {
158	6582	dest++ = hex2byte(s, *(s+1));
159	6582	s += 2;
160	6582	len -= 2;
161		}
162	128	extranib = *s;
163	128	}
164	113	assert(dest <= buf + buflen);
165	113	return (dest - buf);
166	125	}