wcwidth(3C) — DG/UX R4.11



wcwidth(3C)                       SDK R4.11                      wcwidth(3C)


NAME
       wcwidth - determine the number of column positions for a wide
       character

SYNOPSIS
       #include <wchar.h>
       int wcwidth(wintt wc);

DESCRIPTION
       wcwidth determines the number of column printing positions that are
       needed by the wide character wc.

   Return Values
       wcwidth returns zero if wc is a null wide character, or the number of
       column printing positions the wide character wc occupies.  wcwidth
       returns -1 if wc does not correspond to a valid, printable wide
       character.

EXAMPLE
       Here is a program that reads a wide character from standard input and
       prints the width of the character.

              #include <wchar.h>
              #include <stdio.h>

              main()
              {
                   int x;
                   wintt wc;

                   if ((wc=fgetwc(stdin)) != WEOF) {
                        x=wcwidth(wc);
                        if (x==-1)
                         (void) printf("Character not printable\n");
                        else
                         (void) printf("Character width=%d\n",x);
                        exit(0);
                   }
                   (void) printf("Error encountered reading character\n");
                   exit(2);
              }

REFERENCES
       wcswidth(3C)


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