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/*
* Copyright 2019 The Android Open Source Project
*
* 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.
*/
#pragma once
#include <algorithm>
#include <iostream>
#include <regex>
#include <string>
#include "logging.h"
namespace util {
inline std::string GetTypeForSize(int size) {
if (size > 64) {
ERROR() << __func__ << ": Cannot use a type larger than 64 bits. (" << size << ")\n";
}
if (size <= 8) return "uint8_t";
if (size <= 16) return "uint16_t";
if (size <= 32) return "uint32_t";
return "uint64_t";
}
inline int RoundSizeUp(int size) {
if (size > 64) {
ERROR() << __func__ << ": Cannot use a type larger than 64 bits. (" << size << ")\n";
}
if (size <= 8) return 8;
if (size <= 16) return 16;
if (size <= 32) return 32;
return 64;
}
// Returns the max value that can be contained unsigned in a number of bits.
inline uint64_t GetMaxValueForBits(int bits) {
if (bits > 64) {
ERROR() << __func__ << ": Cannot use a type larger than 64 bits. (" << bits << ")\n";
}
// Set all the bits to 1, then shift off extras.
return ~(static_cast<uint64_t>(0)) >> (64 - bits);
}
inline std::string CamelCaseToUnderScore(std::string value) {
if (value[0] < 'A' || value[0] > 'Z') {
ERROR() << value << " doesn't look like CamelCase";
}
// Use static to avoid compiling the regex more than once.
static const std::regex camel_case_regex("[A-Z][a-z0-9]*");
// Add an underscore to the end of each pattern match.
value = std::regex_replace(value, camel_case_regex, "$&_");
// Remove the last underscore at the end of the string.
value.pop_back();
// Convert all characters to lowercase.
std::transform(value.begin(), value.end(), value.begin(), [](unsigned char c) { return std::tolower(c); });
return value;
}
inline std::string UnderscoreToCamelCase(std::string value) {
if (value[0] < 'a' || value[0] > 'z') {
ERROR() << value << " invalid identifier";
}
std::ostringstream camel_case;
bool capitalize = true;
for (unsigned char c : value) {
if (c == '_') {
capitalize = true;
} else {
if (capitalize) {
c = std::toupper(c);
capitalize = false;
}
camel_case << c;
}
}
return camel_case.str();
}
inline std::string ConstantCaseToCamelCase(std::string value) {
if (value[0] < 'A' || value[0] > 'Z') {
ERROR() << value << " doesn't look like CONSTANT_CASE";
}
std::ostringstream camel_case;
bool capitalize = true;
for (unsigned char c : value) {
if (c == '_') {
capitalize = true;
} else {
if (capitalize) {
c = std::toupper(c);
capitalize = false;
} else {
c = std::tolower(c);
}
camel_case << c;
}
}
return camel_case.str();
}
inline bool IsEnumCase(std::string value) {
if (value[0] < 'A' || value[0] > 'Z') {
return false;
}
// Use static to avoid compiling the regex more than once.
static const std::regex enum_regex("[A-Z][A-Z0-9_]*");
return std::regex_match(value, enum_regex);
}
inline std::string StringJoin(const std::string& delimiter, const std::vector<std::string>& vec) {
std::stringstream ss;
for (size_t i = 0; i < vec.size(); i++) {
ss << vec[i];
if (i != (vec.size() - 1)) {
ss << delimiter;
}
}
return ss.str();
}
inline std::string StringFindAndReplaceAll(std::string text, const std::string& old, const std::string& replacement) {
auto pos = text.find(old);
while (pos != std::string::npos) {
text.replace(pos, old.size(), replacement);
pos = text.find(old, pos + replacement.size());
}
return text;
}
inline std::string GetRustTypeForSize(int size) {
if (size > 64) {
ERROR() << __func__ << ": Cannot use a type larger than 64 bits. (" << size << ")\n";
}
if (size <= 8) return "u8";
if (size <= 16) return "u16";
if (size <= 32) return "u32";
return "u64";
}
inline std::string ToLowerCase(std::string value) {
if (value[0] < 'A' || value[0] > 'Z') {
ERROR() << value << " doesn't look like CONSTANT_CASE";
}
std::ostringstream lower_case;
for (unsigned char c : value) {
c = std::tolower(c);
lower_case << c;
}
return lower_case.str();
}
} // namespace util
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