X-Git-Url: https://git.distorted.org.uk/~mdw/mLib/blobdiff_plain/dd3c57bc8cac59e0d657ee665ce462988d27d714..18c831dcd0ae4d660c70ccac69d27ed2a97851be:/struct/dspool.c

diff --git a/struct/dspool.c b/struct/dspool.c
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+++ b/struct/dspool.c
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+/* -*-c-*-
+ *
+ * Provide pools of strings
+ *
+ * (c) 1999 Straylight/Edgeware
+ */
+
+/*----- Licensing notice --------------------------------------------------*
+ *
+ * This file is part of the mLib utilities library.
+ *
+ * mLib is free software; you can redistribute it and/or modify
+ * 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.
+ */
+
+/*----- Header files ------------------------------------------------------*/
+
+#include <stdio.h>
+
+#include "dspool.h"
+#include "dstr.h"
+#include "sub.h"
+
+/*----- Main code ---------------------------------------------------------*/
+
+/* --- @dspool_create@ --- *
+ *
+ * Arguments:	@dspool *p@ = address of pool to create
+ *		@size_t isz@ = initial size of new strings
+ *
+ * Returns:	---
+ *
+ * Use:		Initializes a dynamic string pool.
+ */
+
+void dspool_create(dspool *p, size_t isz)
+{
+  p->free = 0;
+  p->isz = isz;
+}
+
+/* --- @dspool_destroy@ --- *
+ *
+ * Arguments:	@dspool *p@ = pool to destroy
+ *
+ * Returns:	---
+ *
+ * Use:		Releases all of the strings left in the pool.  Any strings
+ *		not put back into the pool aren't freed.  However, the pool
+ *		is still valid, and the active strings can be put back and
+ *		released later.
+ */
+
+void dspool_destroy(dspool *p)
+{
+  dspoolstr *s = p->free;
+  while (s) {
+    dspoolstr *n = s->next;
+    DDESTROY(&s->ds);
+    DESTROY(s);
+    s = n;
+  }
+  p->free = 0;
+}
+
+/* --- @dspool_get@ --- *
+ *
+ * Arguments:	@dspool *p@ = pointer to a string pool
+ *
+ * Returns:	Pointer to a dynamic string.
+ *
+ * Use:		Fetches a string from the pool.  The string has space for at
+ *		least @isz@ characters (where @isz@ is the size passed to
+ *		@dspool_create@ for the pool).
+ */
+
+dstr *dspool_get(dspool *p) { dstr *d; DSGET(p, d); return (d); }
+
+/* --- @dspool_put@ --- *
+ *
+ * Arguments:	@dspool *p@ = pointer to a string pool
+ *		@dstr *d@ = pointer to a dynamic string from a string pool
+ *
+ * Returns:	---
+ *
+ * Use:		Releases a dynamic string back into a string pool.  It
+ *		doesn't have to be the same pool the string actually came
+ *		from, although it does have to have come from some string
+ *		pool.
+ */
+
+void dspool_put(dspool *p, dstr *d) { DSPUT(p, d); }
+
+/*----- That's all, folks -------------------------------------------------*/