strncat_s, wcsncat_s
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Header File
string.h, mbstring.h
Category
Memory and String Manipulation Routines, Inline Routines
Prototype
errno_t *strncat(char * _RESTRICT dest, rsize_t destmax, const char * _RESTRICT src, rsize_t n);
errno_t *wcsncat(wchar_t * _RESTRICT dest, rsize_t destmax, const wchar_t * _RESTRICT src, rsize_t n);
Description
Replaces strncat adding security enhancements.
Appends a portion of one string to another.
strncat_s copies at most n characters from src to the end of dest. The maximum length of the resulting string is strlen(dest) + destmax.
If there is a run-time constraint violation, dest[0] is set to the null character.
Return Value
Returns zero if successful, nonzero otherwise.
Example
#include <string.h> #include <stdio.h> int main(void) { char destination[25]; char *source = " States"; strcpy_s(destination, 7, "United"); strncat_s(destination, 14, source, 7); printf("%s\n", destination); return 0; }
Portability
POSIX | Win32 | ANSI C | ANSI C++ | |
---|---|---|---|---|
strncat_s |
+ |
+ |
+ |
+ |
wcsncat_s |
+ |