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
7
votes
2 answers
wprintf: %p with NULL pointer
As I was writing a unit test, I stumbled upon some odd behavior from glibc, regarding "%p" and the NULL pointer.
If I have a line such as printf("NULL pointer is %p\n", NULL);, then I see NULL pointer is (nil) printed to the screen, as I…
Drew McGowen
- 11,471
- 1
- 31
- 57
6
votes
1 answer
Why is © (the copyright symbol) replaced with (C) when using wprintf?
When I try to print the copyright symbol © with printf or write, it works just fine:
#include
int main(void)
{
printf("©\n");
}
#include
int main(void)
{
write(1, "©\n", 3);
}
Output:
©
But when I try to print it…
S.S. Anne
- 15,171
- 8
- 38
- 76
6
votes
2 answers
_T( ) macro changes for UNICODE character data
I have UNICODE application where in we use _T(x) which is defined as follows.
#if defined(_UNICODE)
#define _T(x) L ##x
#else
#define _T(x) x
#endif
I understand that L gets defined to wchar_t, which will be 4 bytes on any platform. Please correct…
Nagasai Sowmya
- 271
- 2
- 3
- 4
6
votes
2 answers
WideChar to Bytes?
I have simple question here. How to convert WideChar to 2xByte in Delphi - 7? I searched the internet and the StackOverflow but with no results...
Little Helper
- 2,419
- 9
- 37
- 67
5
votes
2 answers
WideChar display issue on Windows 7
I am developing a little application.
The captions (text displayed on the Labels) with WideChars (Greek letters) are correct under Vista and Windows7 in almost every case, but in some cases (on some computers) I have only empty squares. The language…
Andras Kelemen
- 161
- 1
- 1
- 5
5
votes
2 answers
How do you safely declare a 16-bit string literal in C?
I'm aware that there is already a standard method by prefixing with L:
wchar_t *test_literal = L"Test";
The problem is that wchar_t is not guaranteed to be 16-bits, but for my project, I need a 16-bit wchar_t. I'd also like to avoid the requirement…
user6754053
5
votes
2 answers
putwchar() can't diplay a wchar_t variable
Why printf() can display é (\u00E9 int UTF-16) and putwchar() can't ?
And what is the right syntax to get putwchar displaying é correctly ?
#include
#include
#include
#include
int main() {
wint_t wc =…
noraj
- 3,964
- 1
- 30
- 38
5
votes
3 answers
How could I guarantee a terminal has Unicode/wide character support with NCURSES?
I am developing an NCURSES application for a little TUI (text user interface) exercise. Unfortunately, I do not have the option of using the ever-so-wonderful-and-faithful ASCII. My program uses a LOT of Unicode box drawing characters.
My program…
Mason Watmough
- 495
- 6
- 19
5
votes
2 answers
Is there a reason for any C or C++ compiler to not define wctrans_t and wctype_t as the type wchar_t?
Actually, I'm working on a comparison of data types between programming languages, and here is my problem when reading the C and C++ standards.
Quoted from C11,
wctrans_t is a scalar type that can hold values which represent locale-specific…
Astaroth
- 2,241
- 18
- 35
5
votes
1 answer
How does gcc decide the wide character set when calling `mbtowc()`?
According to the gcc manual, the option -fwide-exec-charset specifies the wide character set of wide string and character constants at compile time.
But what is the wide character set when converting a multi-byte character to a wide character by…
spockwang
- 897
- 1
- 6
- 15
4
votes
2 answers
in bash script, howto get the display-width of a String
I want a bash function to count for the String Width that will comsumed when display.
because in my cases, String may contain some wide-charactors (e.g. Chinese). So I cannot just use the length of a string.
function getDisplayWidth ()
{
…
wuxb
- 2,572
- 1
- 21
- 30
4
votes
0 answers
How does the Windows terminal know if I wrote a wide character or a normal character?
I used _setmode(_fileno(stdout), _O_U8TEXT).
I am trying to understand how wprintf() differs from printf(), so I am trying to understand the difference betweem putc() and fputwc(). I thought the difference was that fputwc() could write 1–2 bytes and…
Schilive
- 187
- 7
4
votes
3 answers
What's the difference between struct __stat64 and struct _stati64 on WIN32?
I'm working on some code that needs to run on every version of windows since WIN2000 and also needs to work with wide file paths.
I need to call some variant of stat to get the file length. The file may be larger than 4GB.
Here's the relevant…
vy32
- 28,461
- 37
- 122
- 246
4
votes
1 answer
Mixing std::wcout and std::cout makes errors, what is wrong?
Having been compiled using g++, the program below prints the std::wcout expression only. But if you uncomment the 8th row, it prints three expressions properly.
I would like to know the cause of such strange behavior.
#include
#include…
user11321136
4
votes
1 answer
Trying to read wide char gives EOF
I've got a text file, foo.txt, with these contents:
R⁸2
I had a large program reading it and doing things with each character, but it always received EOF when it hit the ⁸. Here's the relevant portions of the code:
setlocale(LC_ALL,"");
FILE *in =…
MD XF
- 7,860
- 7
- 40
- 71