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#include "cpp11/R.hpp"
#include "cpp11/list.hpp"
#include "cpp11/strings.hpp"
#include "DateTime.h"
#include "DateTimeParser.h"
#include "LocaleInfo.h"
#include "QiParsers.h"
#include "utils.h"
typedef bool (*canParseFun)(const std::string&, LocaleInfo* pLocale);
bool canParse(
const cpp11::strings& x, const canParseFun& canParse, LocaleInfo* pLocale) {
for (const auto & i : x) {
if (i == NA_STRING) {
continue;
}
if (i.size() == 0) {
continue;
}
if (!canParse(std::string(i), pLocale)) {
return false;
}
}
return true;
}
bool allMissing(const cpp11::strings& x) {
for (const auto & i : x) {
if (i != NA_STRING && i.size() > 0) {
return false;
}
}
return true;
}
bool isLogical(const std::string& x, LocaleInfo* /*unused*/) {
const char* const str = x.data();
bool res = isLogical(str, str + x.size());
return res;
}
bool isNumber(const std::string& x, LocaleInfo* pLocale) {
// Leading zero not followed by decimal mark
if (x[0] == '0' && x.size() > 1 && x[1] != pLocale->decimalMark_) {
return false;
}
double res = 0;
std::string::const_iterator begin = x.begin();
std::string::const_iterator end = x.end();
bool ok = parseNumber(
pLocale->decimalMark_, pLocale->groupingMark_, begin, end, res);
return ok && begin == x.begin() && end == x.end();
}
bool isInteger(const std::string& x, LocaleInfo* /*unused*/) {
// Leading zero
if (x[0] == '0' && x.size() > 1) {
return false;
}
double res = 0;
std::string::const_iterator begin = x.begin();
std::string::const_iterator end = x.end();
return parseInt(begin, end, res) && begin == end;
}
bool isDouble(const std::string& x, LocaleInfo* pLocale) {
// Leading zero not followed by decimal mark
if (x[0] == '0' && x.size() > 1 && x[1] != pLocale->decimalMark_) {
return false;
}
double res = 0;
const char* begin = x.c_str();
const char* end = begin + x.size();
return parseDouble(pLocale->decimalMark_, begin, end, res) &&
end == begin + x.size();
}
bool isTime(const std::string& x, LocaleInfo* pLocale) {
DateTimeParser parser(pLocale);
parser.setDate(x.c_str());
return parser.parseLocaleTime();
}
bool isDate(const std::string& x, LocaleInfo* pLocale) {
DateTimeParser parser(pLocale);
parser.setDate(x.c_str());
return parser.parseLocaleDate();
}
static bool isDateTime(const std::string& x, LocaleInfo* pLocale) {
DateTimeParser parser(pLocale);
parser.setDate(x.c_str());
bool ok = parser.parseISO8601();
if (!ok) {
return false;
}
if (!parser.compactDate()) {
return true;
}
// Values like 00014567 are unlikely to be dates, so don't guess
return parser.year() > 999;
}
[[cpp11::register]] std::string collectorGuess(
const cpp11::strings& input,
const cpp11::list& locale_,
bool guessInteger) {
LocaleInfo locale(static_cast<SEXP>(locale_));
if (input.size() == 0) {
return "character";
}
if (allMissing(input)) {
return "logical";
}
// Work from strictest to most flexible
if (canParse(input, isLogical, &locale)) {
return "logical";
}
if (guessInteger && canParse(input, isInteger, &locale)) {
return "integer";
}
if (canParse(input, isDouble, &locale)) {
return "double";
}
if (canParse(input, isNumber, &locale)) {
return "number";
}
if (canParse(input, isTime, &locale)) {
return "time";
}
if (canParse(input, isDate, &locale)) {
return "date";
}
if (canParse(input, isDateTime, &locale)) {
return "datetime";
}
// Otherwise can always parse as a character
return "character";
}
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