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// Copyright 2019 The Amber Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/descriptor_set_and_binding_parser.h"
#include <cctype>
#include <iostream>
#include <limits>
#include "src/tokenizer.h"
namespace amber {
DescriptorSetAndBindingParser::DescriptorSetAndBindingParser() = default;
DescriptorSetAndBindingParser::~DescriptorSetAndBindingParser() = default;
Result DescriptorSetAndBindingParser::Parse(const std::string& buffer_id) {
size_t idx = 0;
// Pipeline name
if (!std::isdigit(buffer_id[idx]) && std::isalpha(buffer_id[idx]) &&
buffer_id[idx] != ':' && buffer_id[idx] != '-') {
idx++;
while (idx < buffer_id.size() && buffer_id[idx] != ':')
idx++;
pipeline_name_ = buffer_id.substr(0, idx);
// Move past the :
idx += 1;
}
if (idx >= buffer_id.size())
return Result("Invalid buffer id: " + buffer_id);
Tokenizer t(buffer_id.substr(idx));
auto token = t.NextToken();
if (token->IsInteger()) {
if (token->AsInt32() < 0) {
return Result(
"Descriptor set and binding for a buffer must be non-negative "
"integer, but you gave: " +
token->ToOriginalString());
}
uint32_t val = token->AsUint32();
token = t.NextToken();
if (token->IsEOS() || token->IsEOL()) {
descriptor_set_ = 0;
binding_ = val;
return {};
}
descriptor_set_ = val;
}
if (!token->IsIdentifier())
return Result("Invalid buffer id: " + buffer_id);
auto& str = token->AsString();
if (str.size() < 2 || str[0] != ':')
return Result("Invalid buffer id: " + buffer_id);
auto substr = str.substr(1, str.size());
// Validate all characters are integers.
for (size_t i = 0; i < substr.size(); ++i) {
if (substr[i] < '0' || substr[i] > '9') {
return Result(
"Binding for a buffer must be non-negative integer, "
"but you gave: " +
substr);
}
}
uint64_t binding_val = strtoul(substr.c_str(), nullptr, 10);
if (binding_val > std::numeric_limits<uint32_t>::max())
return Result("binding value too large in probe ssbo command: " +
token->ToOriginalString());
if (static_cast<int32_t>(binding_val) < 0) {
return Result(
"Binding for a buffer must be non-negative integer, but you gave: " +
token->ToOriginalString());
}
binding_ = static_cast<uint32_t>(binding_val);
return {};
}
} // namespace amber
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