new files

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@4110 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/roken/concat.c

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+/*
+ * Copyright (c) 1995, 1996, 1997 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the Kungliga Tekniska
+ *      H<>gskolan and its contributors.
+ * 
+ * 4. 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 "roken.h"
+
+int
+roken_concat (char *s, size_t len, ...)
+{
+    int ret;
+    va_list args;
+
+    va_start(args, len);
+    ret = k_vconcat (s, len, args);
+    va_end(args);
+    return ret;
+}
+
+int
+roken_vconcat (char *s, size_t len, va_list args)
+{
+    const char *a;
+
+    while ((a = va_arg(args, const char*))) {
+	size_t n = strlen (a);
+
+	if (n >= len)
+	    return -1;
+	strncpy (s, a, n);
+	s += n;
+	len -= n;
+    }
+    *s = '\0';
+    return 0;
+}
+
+size_t
+roken_vmconcat (char **s, size_t max_len, va_list args)
+{
+    const char *a;
+    char *p, *q;
+    size_t len = 0;
+    *s = NULL;
+    p = malloc(1);
+    if(p == NULL)
+	return 0;
+    *p = 0;
+    len = 1;
+    while ((a = va_arg(args, const char*))) {
+	size_t n = strlen (a);
+	
+	if(max_len && len + n > max_len){
+	    free(p);
+	    return 0;
+	}
+	q = realloc(p, len + n);
+	if(q == NULL){
+	    free(p);
+	    return 0;
+	}
+	p = q;
+	len += n;
+	strcat(p, a);
+    }
+    *s = p;
+    return len;
+}
+
+size_t
+roken_mconcat (char **s, size_t max_len, ...)
+{
+    int ret;
+    va_list args;
+
+    va_start(args, max_len);
+    ret = k_vmconcat (s, max_len, args);
+    va_end(args);
+    return ret;
+}