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Questions tagged [codecvt]

48 questions
94
votes
4 answers

Deprecated header replacement

A bit of foreground: my task required converting UTF-8 XML file to UTF-16 (with proper header, of course). And so I searched about usual ways of converting UTF-8 to UTF-16, and found out that one should use templates from . But now when it…
login_not_failed
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45
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4 answers

Is codecvt not a std header?

This code compiles with Visual C++ 11 and runs as expected on Windows 7 but fails to compile using either MinGW 4.7.0 on Windows 7 or gcc 4.8.0 on Linux. Compiling with -std=c++11 flag #include #include // convert UTF-8 string to…
user841550
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16
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3 answers

Stumped with Unicode, Boost, C++, codecvts

In C++, I want to use Unicode to do things. So after falling down the rabbit hole of Unicode, I've managed to end up in a train wreck of confusion, headaches and locales. But in Boost I've had the unfortunate problem of trying to use Unicode file…
Jookia
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13
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2 answers

How do I write a std::codecvt facet?

How do I write a std::codecvt facet? I'd like to write ones that go from UTF-16 to UTF-8, which go from UTF-16 to the systems current code page (windows, so CP_ACP), and to the system's OEM codepage (windows, so CP_OEM). Cross-platform is preferred,…
Billy ONeal
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9
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1 answer

Why is std::codecvt only used by file I/O streams?

I've been implementing a codecvt for handling indentiation of output streams. It can be used like this and works fine: std::cout << indenter::push << "im indentet" << indenter::pop << "\n im not..." However, while I can imbue an std::codecvt to any…
user3520616
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9
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2 answers

Reading/writing/printing UTF-8 in C++11

I have been exploring C++11's new Unicode functionality, and while other C++11 encoding questions have been very helpful, I have a question about the following code snippet from cppreference. The code writes and then immediately reads a text file…
Ephemera
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6
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1 answer

Linker error using VS 2015 RC, can't find symbol related to std::codecvt

I'm getting an STL-related link error, using Microsoft Visual Studio Community 2015 RC (Version 14.0.22823.1 D14REL) I'm linking a C++ DLL and successfully using many functions from the STL, but it can't find stuff related to std::codecvt: error…
topspin
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6
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1 answer

How to read utf-16 file into utf-8 std::string line by line

I'm working with code that expects utf8-encoded std::string variables. I want to be able to handle a user-supplied file that potentially has utf-16 encoding (I don't know the encoding at design time, but eventually want to be able to deal with…
Hoobajoob
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5
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2 answers

trouble with std::codecvt_utf8 facet

Here is a snippet of a code that is using std::codecvt_utf8<> facet to convert from wchar_t to UTF-8. With Visual Studio 2012, my expectations are not met (see the condition at the end of the code). Are my expectations wrong? Why? Or is this a…
wilx
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5
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3 answers

streams, stream_bufs, codecvt facets and \n to \r\n translation

What part of the C++ IO streams does the \r to \r\n conversion? Is it the stream_buf itself or is it part of the internal to external encoding conversion by codecvt facet? UPDATE 1 You all say that it is done in streambuf/filebuf. Ok. But how does…
wilx
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3
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2 answers

Problem installing odbc R package on Windows

I want to install odbc R package but installation failed. Apparently, I miss codecvt, but I don't know wat it is and how to get it. Somebody can help me? Thanks I obtained the following messages : ** package 'odbc' correctement décompressé et sommes…
sylvaine31
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1 answer

How do you use wstring_convert to convert between utf16 and utf32?

When you are going from std::u16string to, lets say std::u32string, std::wstring_convert doesn't work as it expects chars. So how does one use std::wstring_convert to convert between UTF-16 and UTF-32 using std::u16string as input? For example…
scx
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3
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2 answers

parsing strings with value modifiers ('-', '%') at the end

I try to get to grips with parsing. I have some data that comes in a de-de format with additional information at the end of the string. I managed to get the de-de part correct but I struggle in getting the - and % parsed correctly. I read up on…
Johannes
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3
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0 answers

Convert std::string with a binary sequence of bytes into a std::wstring with character set from current locale

At the moment I read the same file twice, because I need two different representations: (a) a raw byte sequence without any conversion, (b) a text representation with bytes being converted into the current execution character set. Basically, the…
user2690527
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3
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1 answer

Is there in locale/codecvt a proper facet to test for character specifics

Well in C++ codecvt/locale library is there a proper facet one could use to test if a character "is" something? IE to test if a character is any form of linebreaking character, or represents a numeric or a whitespace etc etc? Or would one have to go…
paul23
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