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◆ main openmsx / src / utils / StringOp.cc
5.4 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
e8555c89 Andy McCall 1 
#include "StringOp.hh"
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#include "MSXException.hh"
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#include "small_buffer.hh"
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#include "stl.hh"
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#include <bit>
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#include <cstdlib>
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#ifdef __APPLE__
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#include <CoreFoundation/CoreFoundation.h>
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#endif
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namespace StringOp {
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bool stringToBool(std::string_view str)
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{
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	if (str == "1") return true;
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	if ((str.size() == 4) && (strncasecmp(str.data(), "true", 4) == 0))
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		return true;
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	if ((str.size() == 3) && (strncasecmp(str.data(), "yes", 3) == 0))
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		return true;
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	return false;
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}
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std::string toLower(std::string_view str)
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{
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	std::string result(str);
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	transform_in_place(result, ::tolower);
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	return result;
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}
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void trimRight(std::string& str, const char* chars)
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{
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	if (auto pos = str.find_last_not_of(chars); pos != std::string::npos) {
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		str.erase(pos + 1);
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	} else {
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		str.clear();
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	}
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}
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void trimRight(std::string& str, char chars)
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{
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	if (auto pos = str.find_last_not_of(chars); pos != std::string::npos) {
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		str.erase(pos + 1);
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	} else {
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		str.clear();
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	}
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}
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void trimRight(std::string_view& str, std::string_view chars)
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{
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	while (!str.empty() && chars.contains(str.back())) {
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		str.remove_suffix(1);
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	}
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}
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void trimRight(std::string_view& str, char chars)
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{
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	while (!str.empty() && (str.back() == chars)) {
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		str.remove_suffix(1);
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	}
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}
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void trimLeft(std::string& str, const char* chars)
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{
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	str.erase(0, str.find_first_not_of(chars));
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}
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void trimLeft(std::string& str, char chars)
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{
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	str.erase(0, str.find_first_not_of(chars));
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}
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void trimLeft(std::string_view& str, std::string_view chars)
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{
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	while (!str.empty() && chars.contains(str.front())) {
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		str.remove_prefix(1);
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	}
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}
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void trimLeft(std::string_view& str, char chars)
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{
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	while (!str.empty() && (str.front() == chars)) {
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		str.remove_prefix(1);
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	}
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}
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void trim(std::string_view& str, std::string_view chars)
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{
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	trimRight(str, chars);
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	trimLeft (str, chars);
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}
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void trim(std::string_view& str, char chars)
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{
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	trimRight(str, chars);
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	trimLeft (str, chars);
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}
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std::pair<std::string_view, std::string_view> splitOnFirst(std::string_view str, std::string_view chars)
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{
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	if (auto pos = str.find_first_of(chars); pos == std::string_view::npos) {
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		return {str, std::string_view{}};
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	} else {
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		return {str.substr(0, pos), str.substr(pos + 1)};
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	}
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}
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std::pair<std::string_view, std::string_view> splitOnFirst(std::string_view str, char chars)
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{
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	if (auto pos = str.find_first_of(chars); pos == std::string_view::npos) {
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		return {str, std::string_view{}};
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	} else {
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		return {str.substr(0, pos), str.substr(pos + 1)};
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	}
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}
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std::pair<std::string_view, std::string_view> splitOnLast(std::string_view str, std::string_view chars)
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{
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	if (auto pos = str.find_last_of(chars); pos == std::string_view::npos) {
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		return {std::string_view{}, str};
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	} else {
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		return {str.substr(0, pos), str.substr(pos + 1)};
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	}
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}
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std::pair<std::string_view, std::string_view> splitOnLast(std::string_view str, char chars)
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{
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	if (auto pos = str.find_last_of(chars); pos == std::string_view::npos) {
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		return {std::string_view{}, str};
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	} else {
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		return {str.substr(0, pos), str.substr(pos + 1)};
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	}
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}
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//std::vector<std::string_view> split(std::string_view str, char chars)
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//{
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//	std::vector<std::string_view> result;
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//	while (!str.empty()) {
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//		auto [first, last] = splitOnFirst(str, chars);
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//		result.push_back(first);
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//		str = last;
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//	}
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//	return result;
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//}
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static unsigned parseNumber(std::string_view str)
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{
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	trim(str, " \t");
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	auto r = stringToBase<10, unsigned>(str);
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	if (!r) {
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		throw openmsx::MSXException("Invalid integer: ", str);
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	}
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	return *r;
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}
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static void checkRange(unsigned x, unsigned min, unsigned max)
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{
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	if ((min <= x) && (x <= max)) return;
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	throw openmsx::MSXException(
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		"Out of range, should be between [, ", min, ", ", max,
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		"], but got: ", x);
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}
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static void parseRange2(std::string_view str, IterableBitSet<64>& result,
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                        unsigned min, unsigned max)
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{
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	// trimRight only: here we only care about all spaces
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	trimRight(str, " \t");
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	if (str.empty()) return;
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	if (auto pos = str.find('-'); pos == std::string_view::npos) {
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		auto x = parseNumber(str);
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		checkRange(x, min, max);
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		result.set(x);
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	} else {
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		unsigned begin = parseNumber(str.substr(0, pos));
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		unsigned end   = parseNumber(str.substr(pos + 1));
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		if (end < begin) {
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			std::swap(begin, end);
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		}
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		checkRange(begin, min, max);
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		checkRange(end,   min, max);
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		result.setRange(begin, end + 1);
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	}
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}
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IterableBitSet<64> parseRange(std::string_view str, unsigned min, unsigned max)
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{
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	assert(min <= max);
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	assert(max < 64);
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	IterableBitSet<64> result;
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	while (true) {
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		auto next = str.find(',');
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		std::string_view sub = (next == std::string_view::npos)
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		               ? str
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		               : str.substr(0, next++);
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		parseRange2(sub, result, min, max);
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		if (next == std::string_view::npos) break;
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		str = str.substr(next);
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	}
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	return result;
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}
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#ifdef __APPLE__
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std::string fromCFString(CFStringRef str)
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{
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	// Try the quick route first.
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	const char *cstr = CFStringGetCStringPtr(str, kCFStringEncodingUTF8);
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	if (cstr) {
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		// String was already in UTF8 encoding.
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		return std::string(cstr);
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	}
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	// Convert to UTF8 encoding.
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	CFIndex len = CFStringGetLength(str);
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	CFRange range = CFRangeMake(0, len);
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	CFIndex usedBufLen = 0;
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	CFStringGetBytes(
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		str, range, kCFStringEncodingUTF8, '?', false, nullptr, len, &usedBufLen);
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	small_buffer<UInt8, 128> buffer(uninitialized_tag{}, usedBufLen);
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	CFStringGetBytes(
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		str, range, kCFStringEncodingUTF8, '?', false, buffer.data(), len, &usedBufLen);
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	return std::string(reinterpret_cast<const char*>(buffer.data()), usedBufLen);
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}
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#endif
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} // namespace StringOp