helpers.h

// Copyright (c) 2009-2025 Avanquest Software. All rights reserved.
 
#ifndef PDFSDK_CXX_TYPES_H_INCLUDED_
#define PDFSDK_CXX_TYPES_H_INCLUDED_
 
#include <chrono>
#include <functional>
#include <string>
 
#include <pdfsdk/cxx/exception.h>
#include <pdfsdk/core/types.h>
 
namespace PDF {
 
inline std::chrono::system_clock::time_point PDDateTimeToStdTimePoint(const PDDateTime& pddt) {
    std::tm tm = {
            pddt.second, pddt.minute, pddt.hour, pddt.day, pddt.month - 1, pddt.year - 1900, 0, 0, 0};
 
    auto time_point = std::chrono::system_clock::from_time_t(std::mktime(&tm));
    if (pddt.tz_sign == 0)
        return time_point;
 
    auto utc_offset = std::chrono::hours(pddt.tz_hour) + std::chrono::minutes(pddt.tz_minute);
    return pddt.tz_sign > 0
                   ? time_point - utc_offset
                   : time_point + utc_offset;
}
 
namespace detail {
 
template<typename CallableGetter, typename... Args>
std::wstring GetWstringProperty(CallableGetter getter, Args&&... args) {
    size_t valueSize = 0;
    auto ec = std::invoke(getter, args..., nullptr, 0, &valueSize);
    if (ec == kPDErrSuccess)
        return std::wstring{};
    if (ec != kPDErrBufferTooSmall)
        PDF_CHECK_SUCCESS_X(ec);
    std::wstring valueString(valueSize, L'\0');
    PDF_CHECK_SUCCESS_X(std::invoke(getter, args..., &valueString[0], valueSize, &valueSize));
    return valueString;
}
 
template<typename CallableGetter, typename... Args>
std::string GetStringProperty(CallableGetter getter, Args&&... args) {
    size_t valueSize = 0;
    auto ec = std::invoke(getter, args..., nullptr, 0, &valueSize);
    if (ec == kPDErrSuccess)
        return std::string{};
    if (ec != kPDErrBufferTooSmall)
        PDF_CHECK_SUCCESS_X(ec);
    std::string valueString(valueSize, '\0');
    PDF_CHECK_SUCCESS_X(std::invoke(getter, args..., &valueString[0], valueSize, &valueSize));
    return valueString;
}
 
}  // namespace detail
}  // namespace PDF
 
#endif  // PDFSDK_CXX_TYPES_H_INCLUDED_