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