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wcscat(3) Library Functions Manual wcscat(3) NAME wcscat, wcscmp, wcscpy - Perform operations on wide-character strings LIBRARY Standard C Library (libc.so, libc.a) SYNOPSIS #include <wchar.h> wchar_t *wcscat( wchar_t *wcstring1, const wchar_t *wcstring2); int wcscmp( const wchar_t *wcstring1, const wchar_t *wcstring2); wchar_t *wcscpy( wchar_t *wcstring1, const wchar_t *wcstring2); STANDARDS Interfaces documented on this reference page conform to industry stan- dards as follows: wcscat(), wcscmp(), wcscpy(): ISO C, XPG4 Refer to the standards(5) reference page for more information about in- dustry standards and associated tags. PARAMETERS Points to a location containing the first wide-character string. Points to a location containing the second wide-character string. DESCRIPTION The wcscat(), wcscmp(), and wcscpy() functions operate on null-termi- nated, wide-character strings. The string arguments to these functions are expected to contain a null wide character marking the end of the string. Boundary checking is not done when a copy or concatenation op- eration is performed. The wcscat() function appends a copy of the wide-character string pointed to by the wcstring2 parameter (including the terminating null wide character) to the end of the wide-character string pointed to by the wcstring1 parameter. The initial wide-character code of wcstring2 overwrites the null wide-character code at the end of wcstring1. If the append operation is done on overlapping objects, the behavior of the wcscat() function is undefined. The wcscmp() function compares wcstring1 to wcstring2. The wcscmp() function compares wide characters until it finds two wide characters that are not equal or until it has reached a terminating null wide character. The wcscmp() function compares strings based on the machine collating order. It does not use the locale-dependent sorting order. Use the wc- scoll() function for locale-dependent sorting. The wcscpy() function copies the contents of the wcstring2 parameter (including the ending null wide character) into the wcstring1 parame- ter. If copying occurs between overlapping objects, the behavior of the wcscpy() function is undefined. RETURN VALUES On successful completion, the wcscat() and wcscpy() functions return a pointer to the resulting string, wcstring1. On successful completion, the wcscmp() function returns an integer whose value is greater than 0 (zero) if wcstring1 is greater than wc- string2, returns 0 (zero) if the strings are equivalent, and returns an integer whose value is less than 0 (zero) if wcstring1 is less than wc- string2. The sign of a nonzero return value is determined by the sign of the difference between the values of the first pair of wide-charac- ter codes that differ in the objects being compared. [Digital] When a successful comparison cannot be made, the wcscat() and wcscpy() functions return a null pointer, and the wcscmp() function returns zero. RELATED INFORMATION Functions: string(3), wcschr(3), wcscoll(3), wcsncat(3), wcsspn(3), wc- sstr(3) Standards: standards(5) delim off wcscat(3)