1 // Copyright 2019 The Amber Authors.
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 #include "src/descriptor_set_and_binding_parser.h"
16
17 #include <iostream>
18 #include <limits>
19
20 #include "src/tokenizer.h"
21
22 namespace amber {
23
24 DescriptorSetAndBindingParser::DescriptorSetAndBindingParser() = default;
25
26 DescriptorSetAndBindingParser::~DescriptorSetAndBindingParser() = default;
27
Parse(const std::string & buffer_id)28 Result DescriptorSetAndBindingParser::Parse(const std::string& buffer_id) {
29 Tokenizer t(buffer_id);
30 auto token = t.NextToken();
31 if (token->IsInteger()) {
32 if (token->AsInt32() < 0) {
33 return Result(
34 "Descriptor set and binding for a buffer must be non-negative "
35 "integer, but you gave: " +
36 token->ToOriginalString());
37 }
38
39 uint32_t val = token->AsUint32();
40 token = t.NextToken();
41 if (token->IsEOS() || token->IsEOL()) {
42 descriptor_set_ = 0;
43 binding_ = val;
44 return {};
45 }
46
47 descriptor_set_ = val;
48 } else {
49 descriptor_set_ = 0;
50 }
51
52 if (!token->IsString())
53 return Result("Invalid buffer id: " + buffer_id);
54
55 auto& str = token->AsString();
56 if (str.size() < 2 || str[0] != ':')
57 return Result("Invalid buffer id: " + buffer_id);
58
59 auto substr = str.substr(1, str.size());
60 // Validate all characters are integers.
61 for (size_t i = 0; i < substr.size(); ++i) {
62 if (substr[i] < '0' || substr[i] > '9') {
63 return Result(
64 "Binding for a buffer must be non-negative integer, "
65 "but you gave: " +
66 substr);
67 }
68 }
69
70 uint64_t binding_val = strtoul(substr.c_str(), nullptr, 10);
71 if (binding_val > std::numeric_limits<uint32_t>::max())
72 return Result("binding value too large in probe ssbo command: " +
73 token->ToOriginalString());
74 if (static_cast<int32_t>(binding_val) < 0) {
75 return Result(
76 "Binding for a buffer must be non-negative integer, but you gave: " +
77 token->ToOriginalString());
78 }
79
80 binding_ = static_cast<uint32_t>(binding_val);
81 return {};
82 }
83
84 } // namespace amber
85