add bufferlist.c and bufferlist.h

lib/isc/Makefile.in

@@ -37,14 +37,14 @@ NLSOBJS =	nls/msgcat.@O@
 PTHREADOBJS =	pthreads/condition.@O@
 
 OBJS =		@ISC_EXTRA_OBJS@ \
-		assertions.@O@ base64.@O@ buffer.@O@ error.@O@ \
+		assertions.@O@ base64.@O@ buffer.@O@ bufferlist.@O@ error.@O@ \
 		heap.@O@ lex.@O@ lib.@O@ mem.@O@ result.@O@ \
 		rwlock.@O@ serial.@O@ sockaddr.@O@ symtab.@O@ str.@O@ event.@O@ \
 		task.@O@ timer.@O@ version.@O@ \
 		${UNIXOBJS} ${NLSOBJS} ${PTHREADOBJS}
 
 SRCS =		@ISC_EXTRA_SRCS@ \
-		assertions.c base64.c buffer.c error.c \
+		assertions.c base64.c buffer.c bufferlist.c error.c \
 		heap.c lex.c lib.c mem.c result.c \
 		rwlock.c sockaddr.c symtab.c str.c event.c \
 		task.c timer.c version.c

lib/isc/bufferlist.c

+/*
+ * Copyright (C) 1999  Internet Software Consortium.
+ * 
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
+ * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
+ * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ */
+
+#include <config.h>
+
+#include <isc/assertions.h>
+#include <isc/buffer.h>
+#include <isc/bufferlist.h>
+#include <isc/list.h>
+
+unsigned int
+isc_bufferlist_usedcount(isc_bufferlist_t *bl)
+{
+	isc_buffer_t *buffer;
+	unsigned int length;
+
+	REQUIRE(bl != NULL);
+
+	length = 0;
+	buffer = ISC_LIST_HEAD(*bl);
+	while (buffer != NULL) {
+		length += isc_buffer_usedcount(buffer);
+		buffer = ISC_LIST_NEXT(buffer, link);
+	}
+
+	return (length);
+}
+
+unsigned int
+isc_bufferlist_availablecount(isc_bufferlist_t *bl)
+{
+	isc_buffer_t *buffer;
+	unsigned int length;
+
+	REQUIRE(bl != NULL);
+
+	length = 0;
+	buffer = ISC_LIST_HEAD(*bl);
+	while (buffer != NULL) {
+		length += isc_buffer_availablecount(buffer);
+		buffer = ISC_LIST_NEXT(buffer, link);
+	}
+
+	return (length);
+}

lib/isc/include/isc/Makefile.in

@@ -19,7 +19,8 @@ top_srcdir =	@top_srcdir@
 
 @BIND9_VERSION@
 
-HEADERS =	assertions.h base64.h boolean.h buffer.h error.h event.h \
+HEADERS =	assertions.h base64.h boolean.h buffer.h bufferlist.h \
+		error.h event.h \
 		eventclass.h heap.h int.h interfaceiter.h lang.h lex.h lib.h \
 		list.h mem.h msgcat.h netaddr.h rbtgen.h region.h result.h \
 		resultclass.h rwlock.h serial.h sockaddr.h socket.h str.h \

lib/isc/include/isc/bufferlist.h

+/*
+ * Copyright (C) 1998, 1999  Internet Software Consortium.
+ * 
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
+ * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
+ * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ */
+
+#ifndef ISC_BUFFERLIST_H
+#define ISC_BUFFERLIST_H 1
+
+/*****
+ ***** Module Info
+ *****/
+
+/*
+ * Buffer Lists
+ *
+ *	Buffer lists have no synchronization.  Clients must ensure exclusive
+ *	access.
+ *
+ * Reliability:
+ *	No anticipated impact.
+
+ * Security:
+ *	No anticipated impact.
+ *
+ * Standards:
+ *	None.
+ */
+
+/***
+ *** Imports
+ ***/
+
+#include <isc/lang.h>
+#include <isc/buffer.h>
+#include <isc/bufferlist.h>
+#include <isc/list.h>
+#include <isc/mem.h>
+#include <isc/region.h>
+#include <isc/int.h>
+
+ISC_LANG_BEGINDECLS
+
+/***
+ *** Types
+ ***/
+
+typedef ISC_LIST(isc_buffer_t)	isc_bufferlist_t;
+
+/***
+ *** Functions
+ ***/
+
+unsigned int
+isc_bufferlist_usedcount(isc_bufferlist_t *bl);
+/*
+ * Return the length of the sum of all used regions of all buffers in
+ * the buffer list 'bl'
+ *
+ * Requires:
+ *
+ *	'bl' is not NULL.
+ *
+ * Returns:
+ *	sum of all used regions' lengths.
+ */
+
+unsigned int
+isc_bufferlist_availablecount(isc_bufferlist_t *bl);
+/*
+ * Return the length of the sum of all available regions of all buffers in
+ * the buffer list 'bl'
+ *
+ * Requires:
+ *
+ *	'bl' is not NULL.
+ *
+ * Returns:
+ *	sum of all available regions' lengths.
+ */
+
+ISC_LANG_ENDDECLS
+
+#endif /* ISC_BUFFERLIST_H */