// This code is licensed under CC0. // A copy of the license can be obtained at https://creativecommons.org/publicdomain/zero/1.0/ // May you forever catena

// This code is licensed under CC0. // A copy of the license can be obtained at https://creativecommons.org/publicdomain/zero/1.0/ // May you forever catenate in peace. #define strncatm(dest, sz, ...) strncat_multi((dest), (sz), __VA_ARGS__, NULL); char* strncat_multi(char *dest, size_t dest_sz, ...) { va_list srcs; char *dest_end; const char *src; size_t src_sz; size_t dest_off; size_t copy_sz; va_start(srcs, dest_sz); for (dest_end = dest, dest_off = 0; *dest_end && dest_off < dest_sz; dest_end++, dest_sz++); for (src = va_arg(srcs, const char *); src && dest_off < dest_sz; src = va_arg(srcs, const char *)) { src_sz = strlen(src); copy_sz = src_sz < (dest_sz - dest_off) ? src_sz : (dest_sz - dest_off); memmove(dest_end, src, copy_sz); dest_end += copy_sz; dest_off += copy_sz; if (dest_off < dest_sz) { *dest_end = '\0'; } } va_end(srcs); return dest_end; }