common/strutils.cpp

   1
   2 #include "config.h"
   3
   4 #include "strutils.h"
   5
   6 #include <cstdlib>
   7
   8 #ifdef _WIN32
   9 #define WIN32_LEAN_AND_MEAN
  10 #include <windows.h>
  11
  12 #include "alstring.h"
  13
  14 std::string wstr_to_utf8(std::wstring_view wstr)
  15 {
  16     std::string ret;
  17
  18     const int len{WideCharToMultiByte(CP_UTF8, 0, wstr.data(), al::sizei(wstr), nullptr, 0,
  19         nullptr, nullptr)};
  20     if(len > 0)
  21     {
  22         ret.resize(static_cast<size_t>(len));
  23         WideCharToMultiByte(CP_UTF8, 0, wstr.data(), al::sizei(wstr), ret.data(), len,
  24             nullptr, nullptr);
  25     }
  26
  27     return ret;
  28 }
  29
  30 std::wstring utf8_to_wstr(std::string_view str)
  31 {
  32     std::wstring ret;
  33
  34     const int len{MultiByteToWideChar(CP_UTF8, 0, str.data(), al::sizei(str), nullptr, 0)};
  35     if(len > 0)
  36     {
  37         ret.resize(static_cast<size_t>(len));
  38         MultiByteToWideChar(CP_UTF8, 0, str.data(), al::sizei(str), ret.data(), len);
  39     }
  40
  41     return ret;
  42 }
  43 #endif
  44
  45 namespace al {
  46
  47 std::optional<std::string> getenv(const char *envname)
  48 {
  49 #ifdef _GAMING_XBOX
  50     const char *str{::getenv(envname)};
  51 #else
  52     const char *str{std::getenv(envname)};
  53 #endif
  54     if(str && *str != '\0')
  55         return str;
  56     return std::nullopt;
  57 }
  58
  59 #ifdef _WIN32
  60 std::optional<std::wstring> getenv(const WCHAR *envname)
  61 {
  62     const WCHAR *str{_wgetenv(envname)};
  63     if(str && *str != L'\0')
  64         return str;
  65     return std::nullopt;
  66 }
  67 #endif
  68
  69 } // namespace al