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-rw-r--r--src/util/concatenate.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/src/util/concatenate.c b/src/util/concatenate.c
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+/*++
+/* 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"
+#include "compat_va_copy.h"
+
+/* concatenate - concatenate null-terminated list of strings */
+
+char *concatenate(const char *arg0,...)
+{
+ char *result;
+ va_list ap;
+ va_list ap2;
+ ssize_t len;
+ char *arg;
+
+ /*
+ * Initialize argument lists.
+ */
+ va_start(ap, arg0);
+ VA_COPY(ap2, ap);
+
+ /*
+ * Compute the length of the resulting string.
+ */
+ 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);
+ strcpy(result, arg0);
+ while ((arg = va_arg(ap2, char *)) != 0)
+ strcat(result, arg);
+ va_end(ap2);
+ return (result);
+}