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93 lines
2.9 KiB
93 lines
2.9 KiB
// Copyright (c) 2017 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SOURCE_UTIL_STRING_UTILS_H_
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#define SOURCE_UTIL_STRING_UTILS_H_
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#include <assert.h>
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#include <sstream>
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#include <string>
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#include <vector>
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#include "source/util/string_utils.h"
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namespace spvtools {
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namespace utils {
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// Converts arithmetic value |val| to its default string representation.
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template <class T>
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std::string ToString(T val) {
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static_assert(
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std::is_arithmetic<T>::value,
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"spvtools::utils::ToString is restricted to only arithmetic values");
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std::stringstream os;
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os << val;
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return os.str();
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}
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// Converts cardinal number to ordinal number string.
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std::string CardinalToOrdinal(size_t cardinal);
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// Splits the string |flag|, of the form '--pass_name[=pass_args]' into two
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// strings "pass_name" and "pass_args". If |flag| has no arguments, the second
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// string will be empty.
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std::pair<std::string, std::string> SplitFlagArgs(const std::string& flag);
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// Encodes a string as a sequence of words, using the SPIR-V encoding.
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inline std::vector<uint32_t> MakeVector(std::string input) {
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std::vector<uint32_t> result;
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uint32_t word = 0;
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size_t num_bytes = input.size();
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// SPIR-V strings are null-terminated. The byte_index == num_bytes
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// case is used to push the terminating null byte.
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for (size_t byte_index = 0; byte_index <= num_bytes; byte_index++) {
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const auto new_byte =
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(byte_index < num_bytes ? uint8_t(input[byte_index]) : uint8_t(0));
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word |= (new_byte << (8 * (byte_index % sizeof(uint32_t))));
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if (3 == (byte_index % sizeof(uint32_t))) {
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result.push_back(word);
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word = 0;
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}
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}
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// Emit a trailing partial word.
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if ((num_bytes + 1) % sizeof(uint32_t)) {
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result.push_back(word);
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}
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return result;
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}
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// Decode a string from a sequence of words, using the SPIR-V encoding.
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template <class VectorType>
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inline std::string MakeString(const VectorType& words) {
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std::string result;
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for (uint32_t word : words) {
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for (int byte_index = 0; byte_index < 4; byte_index++) {
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uint32_t extracted_word = (word >> (8 * byte_index)) & 0xFF;
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char c = static_cast<char>(extracted_word);
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if (c == 0) {
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return result;
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}
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result += c;
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}
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}
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assert(false && "Did not find terminating null for the string.");
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return result;
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} // namespace utils
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} // namespace utils
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} // namespace spvtools
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#endif // SOURCE_UTIL_STRING_UTILS_H_
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