Line data Source code
1 : /*
2 : *
3 : * Copyright 2015, Google Inc.
4 : * All rights reserved.
5 : *
6 : * Redistribution and use in source and binary forms, with or without
7 : * modification, are permitted provided that the following conditions are
8 : * met:
9 : *
10 : * * Redistributions of source code must retain the above copyright
11 : * notice, this list of conditions and the following disclaimer.
12 : * * Redistributions in binary form must reproduce the above
13 : * copyright notice, this list of conditions and the following disclaimer
14 : * in the documentation and/or other materials provided with the
15 : * distribution.
16 : * * Neither the name of Google Inc. nor the names of its
17 : * contributors may be used to endorse or promote products derived from
18 : * this software without specific prior written permission.
19 : *
20 : * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 : * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 : * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 : * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 : * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 : * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 : * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 : * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 : * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 : * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 : * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 : *
32 : */
33 :
34 : #include "test/core/util/parse_hexstring.h"
35 : #include <grpc/support/log.h>
36 :
37 512 : gpr_slice parse_hexstring(const char *hexstring) {
38 512 : size_t nibbles = 0;
39 512 : const char *p = 0;
40 : gpr_uint8 *out;
41 : gpr_uint8 temp;
42 : gpr_slice slice;
43 :
44 20516 : for (p = hexstring; *p; p++) {
45 20004 : nibbles += (*p >= '0' && *p <= '9') || (*p >= 'a' && *p <= 'f');
46 : }
47 :
48 512 : GPR_ASSERT((nibbles & 1) == 0);
49 :
50 512 : slice = gpr_slice_malloc(nibbles / 2);
51 512 : out = GPR_SLICE_START_PTR(slice);
52 :
53 512 : nibbles = 0;
54 512 : temp = 0;
55 20516 : for (p = hexstring; *p; p++) {
56 20004 : if (*p >= '0' && *p <= '9') {
57 9542 : temp = (gpr_uint8)(temp << 4) | (gpr_uint8)(*p - '0');
58 9542 : nibbles++;
59 10462 : } else if (*p >= 'a' && *p <= 'f') {
60 7212 : temp = (gpr_uint8)(temp << 4) | (gpr_uint8)(*p - 'a' + 10);
61 7212 : nibbles++;
62 : }
63 20004 : if (nibbles == 2) {
64 8377 : *out++ = temp;
65 8377 : nibbles = 0;
66 : }
67 : }
68 :
69 512 : return slice;
70 : }
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