widechar is a generic name for character sets wider than ASCII
The term widechar is a generic name for character sets wider than 8 bits. Generally this means some (unspecified) 16 or 32 bit Unicode encoding.
Questions tagged [widechar]
203 questions
4
votes
2 answers
Converting C++ std::wstring to utf8 with std::codecvt_xxx
C++11 has tools to convert wide char strings std::wstring from/to utf8 representation: std::codecvt, std::codecvt_utf8, std::codecvt_utf8_utf16 etc.
Which one is usable by Windows app to convert regular wide char Windows strings std::wstring to utf8…
Victor Mezrin
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4
votes
4 answers
"Incompatible pointer type" compiler warning for 4th argument of qsort
I'm trying to use the standard library's qsort to sort an array of wide characters:
wchar_t a = L'a';
wchar_t a1 = L'ä';
wchar_t b = L'z';
wchar_t chararray[] = {b, a, a1};
length = wcslen(chararray);
qsort(chararray, length, sizeof(wchar_t),…
chryss
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4
votes
1 answer
Why does wcwidth return -1 with a sign that I can print on the terminal?
Why does here wcwidth return "-1" (not a printable wide character) width "Ԥ" (0x0524)?
#include
#include
#include
int wcwidth(wchar_t wc);
int main()
{
setlocale(LC_CTYPE, "");
wchar_t wc1 = L'合'; // 0x5408
…
sid_com
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4
votes
2 answers
Trouble comparing UTF-8 characters using wchar.h
I am in the process of making a small program that reads a file, that contains UTF-8 elements, char by char. After reading a char it compares it with a few other characters and if there is a match it replaces the character in the file with an…
Eternal_Light
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3
votes
1 answer
Why does printing this wide character string crash on windows?
I stumbled upon a problem while going through some unit tests, and I am not entirely sure why the following simple example crashes on the line with sprintf (Using Windows with Visual Studio 2019).
#include
#include
int…
Julius
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3
votes
0 answers
May wchar_t be promoted to wint_t?
I see one contradiction of glibc reference and Amendment 1 to C90.
The quote from glibc reference says that wchar_t may be promoted to wint_t:
if wchar_t is defined as char the type wint_t must be defined as int due to the parameter promotion
But…
Igor Liferenko
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3
votes
0 answers
C++ - using Unicode in winconsole
I was trying to properly handle unicode input/output in winconsole (Polish Windows 10) using std::wcin, std::wcout, std::wstring, etc. I am using Visual Studio 2015 and Character Set in Property Pages is set to Unicode. After some search and couple…
PKua
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3
votes
1 answer
Why functions from wctype.h do not work without setlocale()?
My setup: glibc 2.24, gcc 6.2.0, UTF-8 environment.
Consider the following example:
#include
#include
#include
int main(void)
{
setlocale(LC_CTYPE, "en_US.UTF-8");
wchar_t wc = L'я'; /* 00000100 01001111 */
if…
Igor Liferenko
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3
votes
2 answers
Why perror() changes orientation of stream when it is redirected?
The standard says that:
The perror() function shall not change the orientation of the standard error stream.
This is the implementation of perror() in GNU libc.
Following are the tests when stderr is wide-oriented, multibyte-oriented and not…
Igor Liferenko
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3
votes
3 answers
Guarantee on size ordering on char, wchar_t, char16_t, char32_t
Does the C++ standard provide any guarantee on the ordering of the size in bytes of char, wchar_t, char16_t, char32_t? (any extract from the standard is welcome)
For example do I have the guarantee that:
sizeof(char) <= sizeof(wchar_t) <=…
Vincent
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3
votes
2 answers
Combine two Bytes to WideChar
Is it possible to combine two Bytes to WideChar and if yes, then how?
For example, letter "ē" in binary is 00010011 = 19 and 00000001 = 1, or 275 together.
var
WChar: WideChar;
begin
WChar := WideChar(275); // Result is "ē"
var
B1, B2:…
Little Helper
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3
votes
4 answers
C++ File IO: Reading and Writing 16-bit Words
I want to write non-Unicode, 16-bit words to a file a read them back later. I know with a bit of byte manipulation I can do this in char mode using fstream::read() and fstream::write(). What do I need to do to use 16-bit words directly?
For example,…
ThomasMcLeod
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3
votes
3 answers
#define syntax with L identifier
#define CONST_FILENAME "okay.dat"
LPCWSTR lpFilename=L CONST_FILENAME; //obviously doesn't work
Basically, how do I get the equivalent of:
LPCWSTR lpFilename=L"okay.dat";
using #define?
IND000
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2
votes
2 answers
Converting Japanese characters from wide characacter to multibyte using API WideChartoMultibyte gives '????'
In my MFC application I am reading Japanese characters from string table then converting it into multibyte using following code
WCHAR wBuf[1024];
int rc;
rc = LoadStringW(hInstance, iResourceID, wBuf, 1024);
WideCharToMultiByte(1252,…
Rahul
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2
votes
2 answers
Problem with printing wide character in c
Hello I want to print the letter 'å' which is 131 in extended ascii and as far as I can see has UTF-8 code 00E5 and 0x00E5 in UTF-16. However, in the code below the program prints 'Õ' which is not what I wanted. I do not know what I have done wrong.…
Alexander Jonsson
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