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/slice_splitter.h"
35 :
36 : #include <string.h>
37 :
38 : #include <grpc/support/alloc.h>
39 : #include <grpc/support/useful.h>
40 :
41 108 : const char *grpc_slice_split_mode_name(grpc_slice_split_mode mode) {
42 108 : switch (mode) {
43 : case GRPC_SLICE_SPLIT_IDENTITY:
44 45 : return "identity";
45 : case GRPC_SLICE_SPLIT_MERGE_ALL:
46 45 : return "merge_all";
47 : case GRPC_SLICE_SPLIT_ONE_BYTE:
48 18 : return "one_byte";
49 : }
50 0 : return "error";
51 : }
52 :
53 158 : void grpc_split_slices(grpc_slice_split_mode mode, gpr_slice *src_slices,
54 : size_t src_slice_count, gpr_slice **dst_slices,
55 : size_t *dst_slice_count) {
56 : size_t i, j;
57 : size_t length;
58 :
59 158 : switch (mode) {
60 : case GRPC_SLICE_SPLIT_IDENTITY:
61 54 : *dst_slice_count = src_slice_count;
62 54 : *dst_slices = gpr_malloc(sizeof(gpr_slice) * src_slice_count);
63 112 : for (i = 0; i < src_slice_count; i++) {
64 58 : (*dst_slices)[i] = src_slices[i];
65 58 : gpr_slice_ref((*dst_slices)[i]);
66 : }
67 54 : break;
68 : case GRPC_SLICE_SPLIT_MERGE_ALL:
69 61 : *dst_slice_count = 1;
70 61 : length = 0;
71 126 : for (i = 0; i < src_slice_count; i++) {
72 65 : length += GPR_SLICE_LENGTH(src_slices[i]);
73 : }
74 61 : *dst_slices = gpr_malloc(sizeof(gpr_slice));
75 61 : **dst_slices = gpr_slice_malloc(length);
76 61 : length = 0;
77 126 : for (i = 0; i < src_slice_count; i++) {
78 260 : memcpy(GPR_SLICE_START_PTR(**dst_slices) + length,
79 130 : GPR_SLICE_START_PTR(src_slices[i]),
80 130 : GPR_SLICE_LENGTH(src_slices[i]));
81 65 : length += GPR_SLICE_LENGTH(src_slices[i]);
82 : }
83 61 : break;
84 : case GRPC_SLICE_SPLIT_ONE_BYTE:
85 43 : length = 0;
86 90 : for (i = 0; i < src_slice_count; i++) {
87 47 : length += GPR_SLICE_LENGTH(src_slices[i]);
88 : }
89 43 : *dst_slice_count = length;
90 43 : *dst_slices = gpr_malloc(sizeof(gpr_slice) * length);
91 43 : length = 0;
92 90 : for (i = 0; i < src_slice_count; i++) {
93 2104223 : for (j = 0; j < GPR_SLICE_LENGTH(src_slices[i]); j++) {
94 2104176 : (*dst_slices)[length] = gpr_slice_sub(src_slices[i], j, j + 1);
95 2104176 : length++;
96 : }
97 : }
98 43 : break;
99 : }
100 158 : }
101 :
102 108 : void grpc_split_slices_to_buffer(grpc_slice_split_mode mode,
103 : gpr_slice *src_slices, size_t src_slice_count,
104 : gpr_slice_buffer *dst) {
105 : gpr_slice *slices;
106 : size_t nslices;
107 : size_t i;
108 108 : grpc_split_slices(mode, src_slices, src_slice_count, &slices, &nslices);
109 2103684 : for (i = 0; i < nslices; i++) {
110 : /* add indexed to avoid re-merging split slices */
111 2103576 : gpr_slice_buffer_add_indexed(dst, slices[i]);
112 : }
113 108 : gpr_free(slices);
114 108 : }
115 :
116 54 : void grpc_split_slice_buffer(grpc_slice_split_mode mode, gpr_slice_buffer *src,
117 : gpr_slice_buffer *dst) {
118 54 : grpc_split_slices_to_buffer(mode, src->slices, src->count, dst);
119 54 : }
120 :
121 110534 : gpr_slice grpc_slice_merge(gpr_slice *slices, size_t nslices) {
122 110534 : gpr_uint8 *out = NULL;
123 110534 : size_t length = 0;
124 110534 : size_t capacity = 0;
125 : size_t i;
126 :
127 531351 : for (i = 0; i < nslices; i++) {
128 420817 : if (GPR_SLICE_LENGTH(slices[i]) + length > capacity) {
129 250354 : capacity = GPR_MAX(capacity * 2, GPR_SLICE_LENGTH(slices[i]) + length);
130 250354 : out = gpr_realloc(out, capacity);
131 : }
132 841634 : memcpy(out + length, GPR_SLICE_START_PTR(slices[i]),
133 841634 : GPR_SLICE_LENGTH(slices[i]));
134 420817 : length += GPR_SLICE_LENGTH(slices[i]);
135 : }
136 :
137 110534 : return gpr_slice_new(out, length, gpr_free);
138 : }
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