X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/mLib/blobdiff_plain/1ef7279c324e278ecf75243ca651710db9ac708e..9fcce036ef8b14c12fc4482efc7c8cf75da3b31f:/selbuf.c?ds=inline

diff --git a/selbuf.c b/selbuf.c
index aafe711..05aec77 100644
--- a/selbuf.c
+++ b/selbuf.c
@@ -1,13 +1,13 @@
 /* -*-c-*-
  *
- * $Id: selbuf.c,v 1.2 1999/05/17 20:36:50 mdw Exp $
+ * $Id: selbuf.c,v 1.6 2004/04/08 01:36:13 mdw Exp $
  *
  * Line-buffering select handler
  *
  * (c) 1999 Straylight/Edgeware
  */
 
-/*----- Licensing notice --------------------------------------------------* 
+/*----- Licensing notice --------------------------------------------------*
  *
  * This file is part of the mLib utilities library.
  *
@@ -15,29 +15,18 @@
  * it under the terms of the GNU Library General Public License as
  * published by the Free Software Foundation; either version 2 of the
  * License, or (at your option) any later version.
- * 
+ *
  * mLib is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU Library General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Library General Public
  * License along with mLib; if not, write to the Free
  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  * MA 02111-1307, USA.
  */
 
-/*----- Revision history --------------------------------------------------* 
- *
- * $Log: selbuf.c,v $
- * Revision 1.2  1999/05/17 20:36:50  mdw
- * Make the magical constants for the buffer flags uppercase.
- *
- * Revision 1.1  1999/05/14 21:01:15  mdw
- * Integrated `select' handling bits from the background resolver project.
- *
- */
-
 /*----- Header files ------------------------------------------------------*/
 
 #include <errno.h>
@@ -111,23 +100,36 @@ static void selbuf_read(int fd, unsigned mode, void *vp)
   int n;
 
   sz = lbuf_free(&b->b, &p);
-again:
   n = read(fd, p, sz);
-  if (n <= 0) {
-    switch (errno) {
-      case EINTR:
-	goto again;
-      case EAGAIN:
+  if (n == 0)
+    lbuf_close(&b->b);
+  else if (n > 0)
+    lbuf_flush(&b->b, p, n);
+  else switch (errno) {
+    case EINTR:
+    case EAGAIN:
 #if EAGAIN != EWOULDBLOCK
-      case EWOULDBLOCK:
+    case EWOULDBLOCK:
 #endif
-	return;
-      default:
-	lbuf_close(&b->b);
-    }
+      return;
+    default:
+      lbuf_close(&b->b);
   }
-  else
-    lbuf_flush(&b->b, p, n);
+}
+
+/* --- @selbuf_setsize@ --- *
+ *
+ * Arguments:	@selbuf *b@ = pointer to buffer block
+ *		@size_t sz@ = size of buffer
+ *
+ * Returns:	---
+ *
+ * Use:		Sets the size of the buffer used for reading lines.
+ */
+
+void selbuf_setsize(selbuf *b, size_t sz)
+{
+  lbuf_setsize(&b->b, sz);
 }
 
 /* --- @selbuf_init@ --- *
@@ -135,7 +137,7 @@ again:
  * Arguments:	@selbuf *b@ = pointer to buffer block
  *		@sel_state *s@ = pointer to select state to attach to
  *		@int fd@ = file descriptor to listen to
- *		@void (*func)(char *s, void *p)@ = function to call
+ *		@lbuf_func *func@ = function to call
  *		@void *p@ = argument for function
  *
  * Returns:	---
@@ -143,11 +145,7 @@ again:
  * Use:		Initializes a buffer block.
  */
 
-void selbuf_init(selbuf *b,
-		 sel_state *s,
-		 int fd,
-		 void (*func)(char */*s*/, void */*p*/),
-		 void *p)
+void selbuf_init(selbuf *b, sel_state *s, int fd, lbuf_func *func, void *p)
 {
   lbuf_init(&b->b, func, p);
   b->b.f &= ~LBUF_ENABLE;
@@ -155,4 +153,19 @@ void selbuf_init(selbuf *b,
   selbuf_enable(b);
 }
 
+/* --- @selbuf_destroy@ --- *
+ *
+ * Arguments:	@selbuf *b@ = pointer to buffer block
+ *
+ * Returns:	---
+ *
+ * Use:		Deallocates a line buffer and frees any resources it owned.
+ */
+
+void selbuf_destroy(selbuf *b)
+{
+  selbuf_disable(b);
+  lbuf_destroy(&b->b);
+}
+
 /*----- That's all, folks -------------------------------------------------*/