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// Copyright (c) 2024 Google LLC
//
// 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 "source/to_string.h"
#include <cassert>
namespace spvtools {
std::string to_string(uint32_t n) {
// This implementation avoids using standard library features that access
// the locale. Using the locale requires taking a mutex which causes
// annoying serialization.
constexpr int max_digits = 10; // max uint has 10 digits
// Contains the resulting digits, with least significant digit in the last
// entry.
char buf[max_digits];
int write_index = max_digits - 1;
if (n == 0) {
buf[write_index] = '0';
} else {
while (n > 0) {
int units = n % 10;
buf[write_index--] = "0123456789"[units];
n = (n - units) / 10;
}
write_index++;
}
assert(write_index >= 0);
return std::string(buf + write_index, max_digits - write_index);
}
} // namespace spvtools
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