wcswidth
wcswidth is a function in the C standard library used to determine the display width of a wide-character string when rendered in a terminal. It returns the number of column positions needed to display the first up to n wide characters from pwcs, according to the widths reported by wcwidth for each character. The function stops early if it encounters a null terminator within the first n characters.
Prototype and header: int wcswidth(const wchar_t *pwcs, size_t n); It is declared in the header <wchar.h>. The
Behavior: For each character in the range up to n or until the string terminator, wcswidth sums
Locale and portability: The width calculation depends on the current locale because wcwidth uses locale-specific rules.