1 /* Copyright 2015 The TensorFlow Authors. All Rights Reserved.
2
3 Licensed under the Apache License, Version 2.0 (the "License");
4 you may not use this file except in compliance with the License.
5 You may obtain a copy of the License at
6
7 http://www.apache.org/licenses/LICENSE-2.0
8
9 Unless required by applicable law or agreed to in writing, software
10 distributed under the License is distributed on an "AS IS" BASIS,
11 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 See the License for the specific language governing permissions and
13 limitations under the License.
14 ==============================================================================*/
15
16 #include "tensorflow/core/platform/tensor_coding.h"
17
18 #include <vector>
19 #include "tensorflow/core/framework/resource_handle.pb.h"
20 #include "tensorflow/core/lib/core/coding.h"
21 #include "tensorflow/core/lib/core/stringpiece.h"
22
23 namespace tensorflow {
24 namespace port {
25
AssignRefCounted(StringPiece src,core::RefCounted * obj,string * out)26 void AssignRefCounted(StringPiece src, core::RefCounted* obj, string* out) {
27 out->assign(src.data(), src.size());
28 }
29
EncodeStringList(const string * strings,int64 n,string * out)30 void EncodeStringList(const string* strings, int64 n, string* out) {
31 out->clear();
32 for (int i = 0; i < n; ++i) {
33 core::PutVarint32(out, strings[i].size());
34 }
35 for (int i = 0; i < n; ++i) {
36 out->append(strings[i]);
37 }
38 }
39
DecodeStringList(const string & src,string * strings,int64 n)40 bool DecodeStringList(const string& src, string* strings, int64 n) {
41 std::vector<uint32> sizes(n);
42 StringPiece reader(src);
43 int64 tot = 0;
44 for (auto& v : sizes) {
45 if (!core::GetVarint32(&reader, &v)) return false;
46 tot += v;
47 }
48 if (tot != static_cast<int64>(reader.size())) {
49 return false;
50 }
51
52 string* data = strings;
53 for (int64 i = 0; i < n; ++i, ++data) {
54 auto size = sizes[i];
55 if (size > reader.size()) {
56 return false;
57 }
58 data->assign(reader.data(), size);
59 reader.remove_prefix(size);
60 }
61
62 return true;
63 }
64
CopyFromArray(string * s,const char * base,size_t bytes)65 void CopyFromArray(string* s, const char* base, size_t bytes) {
66 s->assign(base, bytes);
67 }
68
EncodeResourceHandleList(const ResourceHandle * p,int64 n,string * out)69 void EncodeResourceHandleList(const ResourceHandle* p, int64 n, string* out) {
70 out->clear();
71 string rest;
72 ResourceHandleProto proto;
73 for (int i = 0; i < n; ++i) {
74 p[i].AsProto(&proto);
75 core::PutVarint32(out, proto.ByteSize());
76 proto.AppendToString(&rest);
77 }
78 *out += rest;
79 }
80
DecodeResourceHandleList(const string & in,ResourceHandle * ps,int64 n)81 bool DecodeResourceHandleList(const string& in, ResourceHandle* ps, int64 n) {
82 std::vector<uint32> sizes(n);
83 StringPiece reader(in);
84 int64 total = 0;
85 for (auto& size : sizes) {
86 if (!core::GetVarint32(&reader, &size)) return false;
87 total += size;
88 }
89 if (total != static_cast<int64>(reader.size())) {
90 return false;
91 }
92 ResourceHandleProto proto;
93 for (int i = 0; i < n; ++i) {
94 if (!proto.ParseFromArray(reader.data(), sizes[i])) {
95 return false;
96 }
97 ps[i].FromProto(proto);
98 reader.remove_prefix(sizes[i]);
99 }
100 return true;
101 }
102
103 } // namespace port
104 } // namespace tensorflow
105