/*++ /* NAME /* concatenate 3 /* SUMMARY /* concatenate strings /* SYNOPSIS /* #include <stringops.h> /* /* char *concatenate(str, ...) /* const char *str; /* DESCRIPTION /* The \fBconcatenate\fR routine concatenates a null-terminated /* list of pointers to null-terminated character strings. /* The result is dynamically allocated and should be passed to myfree() /* when no longer needed. /* LICENSE /* .ad /* .fi /* The Secure Mailer license must be distributed with this software. /* AUTHOR(S) /* Wietse Venema /* IBM T.J. Watson Research /* P.O. Box 704 /* Yorktown Heights, NY 10598, USA /*--*/ /* System library. */ #include <sys_defs.h> #include <stdlib.h> /* 44BSD stdarg.h uses abort() */ #include <stdarg.h> #include <string.h> /* Utility library. */ #include "mymalloc.h" #include "stringops.h" /* concatenate - concatenate null-terminated list of strings */ char *concatenate(const char *arg0,...) { char *result; va_list ap; ssize_t len; char *arg; /* * Compute the length of the resulting string. */ va_start(ap, arg0); len = strlen(arg0); while ((arg = va_arg(ap, char *)) != 0) len += strlen(arg); va_end(ap); /* * Build the resulting string. Don't care about wasting a CPU cycle. */ result = mymalloc(len + 1); va_start(ap, arg0); strlcpy(result, arg0, len + 1); while ((arg = va_arg(ap, char *)) != 0) strlcat(result, arg, len + 1); va_end(ap); return (result); }