new file

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@7783 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/roken/strcollect.c

@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 1998, 1999 Kungliga Tekniska H<>gskolan
+ * (Royal Institute of Technology, Stockholm, Sweden). 
+ * All rights reserved. 
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions 
+ * are met: 
+ *
+ * 1. Redistributions of source code must retain the above copyright 
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright 
+ *    notice, this list of conditions and the following disclaimer in the 
+ *    documentation and/or other materials provided with the distribution. 
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors 
+ *    may be used to endorse or promote products derived from this software 
+ *    without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+ * SUCH DAMAGE. 
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+RCSID("$Id$");
+#endif
+
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <roken.h>
+
+enum { initial = 10, increment = 5 };
+
+static char **
+sub (char **argv, int i, int argc, va_list *ap)
+{
+    do {
+	if(i == argc) {
+	    /* realloc argv */
+	    char **tmp = realloc(argv, (argc + increment) * sizeof(*argv));
+	    if(tmp == NULL) {
+		free(argv);
+		errno = ENOMEM;
+		return NULL;
+	    }
+	    argv  = tmp;
+	    argc += increment;
+	}
+	argv[i++] = va_arg(*ap, char*);
+    } while(argv[i - 1] != NULL);
+    return argv;
+}
+
+/*
+ * return a malloced vector of pointers to the strings in `ap'
+ * terminated by NULL.
+ */
+
+char **
+vstrcollect(va_list *ap)
+{
+    return sub (NULL, 0, 0, ap);
+}
+
+/*
+ *
+ */
+
+char **
+strcollect(char *first, ...)
+{
+    va_list ap;
+    char **ret = malloc (initial * sizeof(char *));
+
+    if (ret == NULL)
+	return ret;
+
+    ret[0] = first;
+    va_start(ap, first);
+    ret = sub (ret, 1, initial, &ap);
+    va_end(ap);
+    return ret;
+}