diff options
Diffstat (limited to 'indra/llcommon/llstring.h')
| -rw-r--r-- | indra/llcommon/llstring.h | 65 |
1 files changed, 35 insertions, 30 deletions
diff --git a/indra/llcommon/llstring.h b/indra/llcommon/llstring.h index 4263122f36..89e95ef40a 100644 --- a/indra/llcommon/llstring.h +++ b/indra/llcommon/llstring.h @@ -535,6 +535,11 @@ struct ll_convert_impl<TO, FROM> \ TO operator()(const FROM& in) const { return EXPR; } \ } +// If all we're doing is copying characters, pass this as EXPR. Since it +// expands into the 'return EXPR' slot in the ll_convert_impl specialization +// above, it implies TO{ in.begin(), in.end() }. +#define LL_CONVERT_COPY_CHARS { in.begin(), in.end() } + // Make the incoming string a utf8 string. Replaces any unknown glyph // with the UNKNOWN_CHARACTER. Once any unknown glyph is found, the rest // of the data may not be recovered. @@ -571,30 +576,31 @@ LL_COMMON_API std::string rawstr_to_utf8(const std::string& raw); // LL_WCHAR_T_NATIVE. typedef std::basic_string<U16> llutf16string; -#if ! defined(LL_WCHAR_T_NATIVE) -// wchar_t is identical to U16, and std::wstring is identical to llutf16string. -// Defining an ll_convert alias involving llutf16string would collide with the -// comparable preferred alias involving std::wstring. (In this scenario, if -// you pass llutf16string, it will engage the std::wstring specialization.) -#define ll_convert_u16_alias(TO, FROM, EXPR) // nothing -#else // defined(LL_WCHAR_T_NATIVE) -// wchar_t is a distinct native type, so llutf16string is also a distinct -// type, and there IS a point to converting separately to/from llutf16string. -// (But why? Windows APIs are still defined in terms of wchar_t, and -// in this scenario llutf16string won't work for them!) -#define ll_convert_u16_alias(TO, FROM, EXPR) ll_convert_alias(TO, FROM, EXPR) - -#if LL_WINDOWS -// LL_WCHAR_T_NATIVE is defined on non-Windows systems because, in fact, -// wchar_t is native. Everywhere but Windows, we use it for llwchar (see -// stdtypes.h). That makes LLWString identical to std::wstring, so these -// aliases for std::wstring would collide with those for LLWString. Only -// define on Windows, where converting between std::wstring and llutf16string -// means copying chars. -ll_convert_alias(llutf16string, std::wstring, llutf16string(in.begin(), in.end())); -ll_convert_alias(std::wstring, llutf16string, std::wstring(in.begin(), in.end())); -#endif // LL_WINDOWS -#endif // defined(LL_WCHAR_T_NATIVE) +// Considering wchar_t, llwchar and U16, there are three relevant cases: +#if LLWCHAR_IS_WCHAR_T // every which way but Windows +// llwchar is identical to wchar_t, LLWString is identical to std::wstring. +// U16 is distinct, llutf16string is distinct (though pretty useless). +// Given conversions to/from LLWString and to/from llutf16string, conversions +// involving std::wstring would collide. +#define ll_convert_wstr_alias(TO, FROM, EXPR) // nothing +// but we can define conversions involving llutf16string without collisions +#define ll_convert_u16_alias(TO, FROM, EXPR) ll_convert_alias(TO, FROM, EXPR) + +#elif defined(LL_WCHAR_T_NATIVE) // Windows, either clang or MS /Zc:wchar_t +// llwchar (32-bit), wchar_t (16-bit) and U16 are all different types. +// Conversions to/from LLWString, to/from std::wstring and to/from llutf16string +// can all be defined. +#define ll_convert_wstr_alias(TO, FROM, EXPR) ll_convert_alias(TO, FROM, EXPR) +#define ll_convert_u16_alias(TO, FROM, EXPR) ll_convert_alias(TO, FROM, EXPR) + +#else // ! LL_WCHAR_T_NATIVE: Windows with MS /Zc:wchar_t- +// wchar_t is identical to U16, std::wstring is identical to llutf16string. +// Given conversions to/from LLWString and to/from std::wstring, conversions +// involving llutf16string would collide. +#define ll_convert_u16_alias(TO, FROM, EXPR) // nothing +// but we can define conversions involving std::wstring without collisions +#define ll_convert_wstr_alias(TO, FROM, EXPR) ll_convert_alias(TO, FROM, EXPR) +#endif LL_COMMON_API LLWString utf16str_to_wstring(const llutf16string &utf16str, S32 len); LL_COMMON_API LLWString utf16str_to_wstring(const llutf16string &utf16str); @@ -625,9 +631,8 @@ LL_COMMON_API std::string utf16str_to_utf8str(const llutf16string &utf16str, S32 LL_COMMON_API std::string utf16str_to_utf8str(const llutf16string &utf16str); ll_convert_u16_alias(std::string, llutf16string, utf16str_to_utf8str(in)); -#if LL_WINDOWS +// an older alias for utf16str_to_utf8str(llutf16string) inline std::string wstring_to_utf8str(const llutf16string &utf16str) { return utf16str_to_utf8str(utf16str);} -#endif // Length of this UTF32 string in bytes when transformed to UTF8 LL_COMMON_API S32 wstring_utf8_length(const LLWString& wstr); @@ -715,7 +720,7 @@ inline std::string ll_convert_wide_to_string(const std::wstring& in) { return ll_convert_wide_to_string(in.c_str()); } -ll_convert_alias(std::string, std::wstring, ll_convert_wide_to_string(in)); +ll_convert_wstr_alias(std::string, std::wstring, ll_convert_wide_to_string(in)); /** * Converts a string to wide string. @@ -724,19 +729,19 @@ LL_COMMON_API std::wstring ll_convert_string_to_wide(const std::string& in, unsigned int code_page); LL_COMMON_API std::wstring ll_convert_string_to_wide(const std::string& in); // default CP_UTF8 -ll_convert_alias(std::wstring, std::string, ll_convert_string_to_wide(in)); +ll_convert_wstr_alias(std::wstring, std::string, ll_convert_string_to_wide(in)); /** * Convert a Windows wide string to our LLWString */ LL_COMMON_API LLWString ll_convert_wide_to_wstring(const std::wstring& in); -ll_convert_alias(LLWString, std::wstring, ll_convert_wide_to_wstring(in)); +ll_convert_wstr_alias(LLWString, std::wstring, ll_convert_wide_to_wstring(in)); /** * Convert LLWString to Windows wide string */ LL_COMMON_API std::wstring ll_convert_wstring_to_wide(const LLWString& in); -ll_convert_alias(std::wstring, LLWString, ll_convert_wstring_to_wide(in)); +ll_convert_wstr_alias(std::wstring, LLWString, ll_convert_wstring_to_wide(in)); /** * Converts incoming string into utf8 string |