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// Copyright (c) 2015-2016 The Khronos Group Inc.
//
// 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.
#ifndef SOURCE_DIAGNOSTIC_H_
#define SOURCE_DIAGNOSTIC_H_
#include <sstream>
#include <string>
#include "spirv-tools/libspirv.hpp"
namespace spvtools {
// A DiagnosticStream remembers the current position of the input and an error
// code, and captures diagnostic messages via the left-shift operator.
// If the error code is not SPV_FAILED_MATCH, then captured messages are
// emitted during the destructor.
class DiagnosticStream {
public:
DiagnosticStream(spv_position_t position, const MessageConsumer& consumer,
const std::string& disassembled_instruction,
spv_result_t error)
: position_(position),
consumer_(consumer),
disassembled_instruction_(disassembled_instruction),
error_(error) {}
// Creates a DiagnosticStream from an expiring DiagnosticStream.
// The new object takes the contents of the other, and prevents the
// other from emitting anything during destruction.
DiagnosticStream(DiagnosticStream&& other);
// Destroys a DiagnosticStream.
// If its status code is something other than SPV_FAILED_MATCH
// then emit the accumulated message to the consumer.
~DiagnosticStream();
// Adds the given value to the diagnostic message to be written.
template <typename T>
DiagnosticStream& operator<<(const T& val) {
stream_ << val;
return *this;
}
// Conversion operator to spv_result, returning the error code.
operator spv_result_t() { return error_; }
private:
std::ostringstream stream_;
spv_position_t position_;
MessageConsumer consumer_; // Message consumer callback.
std::string disassembled_instruction_;
spv_result_t error_;
};
// Changes the MessageConsumer in |context| to one that updates |diagnostic|
// with the last message received.
//
// This function expects that |diagnostic| is not nullptr and its content is a
// nullptr.
void UseDiagnosticAsMessageConsumer(spv_context context,
spv_diagnostic* diagnostic);
std::string spvResultToString(spv_result_t res);
} // namespace spvtools
#endif // SOURCE_DIAGNOSTIC_H_
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