wcwidth(3) Library Functions Manual wcwidth(3)
NAME
wcwidth - Determines the display width of wide characters
LIBRARY
Standard C Library (libc)
SYNOPSIS
#include <wchar.h>
int wcwidth(
wchar_t wc);
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
wcwidth(): XSH5.0
Refer to the standards(5) reference page for more information about industry standards and associated tags.
PARAMETERS
Specifies a wide character.
DESCRIPTION
The wcwidth() function determines the number of display columns to be occupied by the wide character specified by the wc parameter. The
behavior of the wcwidth() function is determined by the LC_CTYPE category.
EXAMPLES
The following example finds the display width of a wide character:
#include <string.h> #include <locale.h>
main() { wchar_t wc; int retval; (void)setlocale(LC_ALL, ""); /* Let wc be the wide character whose ** display
width is to be found. */ retval= wcwidth( wc ); if(retval == -1){ /* ** Error handling. Invalid wide
character in wc. */ } }
RETURN VALUES
The wcwidth() function returns the number of display columns to be occupied by the wc parameter. If the wc parameter is a null wide charac-
ter, a value of 0 (zero) is returned. If the wc parameter contains an invalid wide character code, a value of -1 is returned.
RELATED INFORMATION
Functions: mblen(3), wcslen(3), wcswidth(3)
Standards: standards(5) delim off
wcwidth(3)
