add strpool, a printf collector to make it eaiser to collect strings

into one string


git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@15519 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/roken/roken-common.h

@@ -381,6 +381,19 @@ warnerr(int doerrno, const char *fmt, va_list ap)
 void * ROKEN_LIB_FUNCTION
 rk_realloc(void *, size_t);
 
+struct rk_strpool;
+
+char * ROKEN_LIB_FUNCTION
+rk_strpoolcollect(struct rk_strpool *);
+
+struct rk_strpool * ROKEN_LIB_FUNCTION
+rk_strpoolprintf(struct rk_strpool *, const char *, ...)
+    __attribute__ ((format (printf, 1, 0)));;
+
+void ROKEN_LIB_FUNCTION
+rk_strpoolfree(struct rk_strpool *);
+
+
 ROKEN_CPP_END
 
 #endif /* __ROKEN_COMMON_H__ */

lib/roken/strpool.c

@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2005 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 <roken.h>
+
+struct rk_strpool {
+    char *str;
+    size_t len;
+};
+
+/*
+ *
+ */
+
+void ROKEN_LIB_FUNCTION
+rk_strpoolfree(struct rk_strpool *p)
+{
+    if (p->str) {
+	free(p->str);
+	p->str = NULL;
+    }
+    free(p);
+}
+
+/*
+ *
+ */
+
+struct rk_strpool * ROKEN_LIB_FUNCTION
+rk_strpoolprintf(struct rk_strpool *p, const char *fmt, ...)
+{
+    va_list ap;
+    char *str, *str2;
+    int len;
+
+    if (p == NULL) {
+	p = malloc(sizeof(*p));
+	if (p == NULL)
+	    return NULL;
+	p->str = NULL;
+	p->len = 0;
+    }
+    va_start(ap, fmt);
+    len = vasprintf(&str, fmt, ap);
+    va_end(ap);
+    if (str == NULL) {
+	printf("vasprintf");
+	rk_strpoolfree(p);
+	return NULL;
+    }
+    str2 = realloc(p->str, len + p->len + 1);
+    if (str2 == NULL) {
+	printf("realloc");
+	rk_strpoolfree(p);
+	return NULL;
+    }
+    p->str = str2;
+    memcpy(p->str + p->len, str, len + 1);
+    p->len += len;
+    return p;
+}
+
+/*
+ *
+ */
+
+char * ROKEN_LIB_FUNCTION
+rk_strpoolcollect(struct rk_strpool *p)
+{
+    char *str = p->str;
+    p->str = NULL;
+    free(p);
+    return str;
+}