#include <stdarg.h>#include <string.h>#include "error.hh"#include "sulima.hh"// Create a dynamically-allocated copy of the string (s), sort of like BSD// strdup().char *copy(const char *s){    size_t len = strlen(s) + 1;    char *ret = new char[len];    memcpy(ret, s, len);    return ret;}// A bloated but useful version of the above. Returned a dynamically-// allocated copy of the arguments, concatenated into a single string. The// list of arguments is null-terminated.  This function is not particularly// fast, but then again, it does not have to be in order to be useful.char *copy(const char *s0, const char *s1, ...){    va_list ap;    size_t len0 = strlen(s0), len = 0;    const char *s;    // Compute the total length of the strings.    va_start(ap, s1);    for (s = s1, len = len0; s; s = va_arg(ap, const char *))	len += strlen(s);    va_end(ap);    // Allocate the memory and return concatenated result.    char *ret = new char[len + 1];    memcpy(ret, s0, len0);    char *d = ret + len0;    va_start(ap, s1);    for (s = s1; s; s = va_arg(ap, const char *)) {	len = strlen(s);	memcpy(d, s, len);	d += len;    }    va_end(ap);    *d = '\0';    return ret;}