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/* Copyright (c) 2025 The Khronos Group Inc.
* Copyright (c) 2025 Valve Corporation
* Copyright (c) 2025 LunarG, 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.
*/
#include "text_utils.h"
#include <algorithm>
#include <cassert>
#include <vector>
namespace text {
std::string VFormat(const char *format, va_list argptr) {
// Counts actual characters. Null terminator is accounted separately.
const int initial_max_symbol_count = 1024;
// Use vector as the output buffer for c-style formatting routines.
// Do not write directly to std::string internal storage because its
// structure and null terminator convention is not standardized.
std::vector<char> buffer(initial_max_symbol_count + 1 /*null terminator*/);
// The va_list will be modified by the call to vsnprintf. Use a copy in case we need to try again.
va_list argptr2;
va_copy(argptr2, argptr);
const int symbol_count = vsnprintf(buffer.data(), buffer.size(), format, argptr2);
va_end(argptr2);
if (symbol_count < 0) {
assert(false && "unexpected vsnprintf error");
return {};
}
if (symbol_count > initial_max_symbol_count) {
buffer.resize(symbol_count + 1 /*null terminator*/);
vsnprintf(buffer.data(), buffer.size(), format, argptr);
}
std::string str(buffer.data());
return str;
}
std::string Format(const char *format, ...) {
va_list argptr;
va_start(argptr, format);
std::string str = VFormat(format, argptr);
va_end(argptr);
return str;
}
void ToLower(std::string &str) {
// std::tolower() returns int which can cause compiler warnings
std::transform(str.begin(), str.end(), str.begin(), [](char c) { return static_cast<char>(std::tolower(c)); });
}
void ToUpper(std::string &str) {
// std::toupper() returns int which can cause compiler warnings
std::transform(str.begin(), str.end(), str.begin(), [](char c) { return static_cast<char>(std::toupper(c)); });
}
} // namespace text
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