summaryrefslogtreecommitdiff
path: root/backend/hp-hpmem.c
diff options
context:
space:
mode:
authorJörg Frings-Fürst <debian@jff-webhosting.net>2014-10-06 14:00:40 +0200
committerJörg Frings-Fürst <debian@jff-webhosting.net>2014-10-06 14:00:40 +0200
commit6e9c41a892ed0e0da326e0278b3221ce3f5713b8 (patch)
tree2e301d871bbeeb44aa57ff9cc070fcf3be484487 /backend/hp-hpmem.c
Initial import of sane-backends version 1.0.24-1.2
Diffstat (limited to 'backend/hp-hpmem.c')
-rw-r--r--backend/hp-hpmem.c151
1 files changed, 151 insertions, 0 deletions
diff --git a/backend/hp-hpmem.c b/backend/hp-hpmem.c
new file mode 100644
index 0000000..d082bda
--- /dev/null
+++ b/backend/hp-hpmem.c
@@ -0,0 +1,151 @@
+/* sane - Scanner Access Now Easy.
+ Copyright (C) 1997 Geoffrey T. Dairiki
+ This file is part of the SANE package.
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ This program 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ MA 02111-1307, USA.
+
+ As a special exception, the authors of SANE give permission for
+ additional uses of the libraries contained in this release of SANE.
+
+ The exception is that, if you link a SANE library with other files
+ to produce an executable, this does not by itself cause the
+ resulting executable to be covered by the GNU General Public
+ License. Your use of that executable is in no way restricted on
+ account of linking the SANE library code into it.
+
+ This exception does not, however, invalidate any other reasons why
+ the executable file might be covered by the GNU General Public
+ License.
+
+ If you submit changes to SANE to the maintainers to be included in
+ a subsequent release, you agree by submitting the changes that
+ those changes may be distributed with this exception intact.
+
+ If you write modifications of your own for SANE, it is your choice
+ whether to permit this exception to apply to your modifications.
+ If you do not wish that, delete this exception notice.
+
+ This file is part of a SANE backend for HP Scanners supporting
+ HP Scanner Control Language (SCL).
+*/
+/*
+#define STUBS
+extern int sanei_debug_hp;*/
+#define DEBUG_DECLARE_ONLY
+#include "../include/sane/config.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include "../include/lassert.h"
+
+#include "hp.h"
+
+typedef struct hp_alloc_s Alloc;
+
+struct hp_alloc_s
+{
+ Alloc * prev;
+ Alloc * next;
+ hp_byte_t buf[1];
+};
+
+static Alloc head[] = {{ head, head, {0} }};
+
+#define DATA_OFFSET (head->buf - (hp_byte_t *)head)
+#define VOID_TO_ALLOCP(p) ((Alloc *)((hp_byte_t *)(p) - DATA_OFFSET))
+#define ALLOCSIZE(sz) (sz + DATA_OFFSET)
+
+
+void *
+sanei_hp_alloc (size_t sz)
+{
+ Alloc * new = malloc(ALLOCSIZE(sz));
+
+ if (!new)
+ return 0;
+ (new->next = head->next)->prev = new;
+ (new->prev = head)->next = new;
+ return new->buf;
+}
+
+void *
+sanei_hp_allocz (size_t sz)
+{
+ void * new = sanei_hp_alloc(sz);
+
+ if (!new)
+ return 0;
+ memset(new, 0, sz);
+ return new;
+}
+
+void *
+sanei_hp_memdup (const void * src, size_t sz)
+{
+ char * new = sanei_hp_alloc(sz);
+ if (!new)
+ return 0;
+ return memcpy(new, src, sz);
+}
+
+char *
+sanei_hp_strdup (const char * str)
+{
+ return sanei_hp_memdup(str, strlen(str) + 1);
+}
+
+void *
+sanei_hp_realloc (void * ptr, size_t sz)
+{
+ if (ptr)
+ {
+ Alloc * old = VOID_TO_ALLOCP(ptr);
+ Alloc copy = *old;
+ Alloc * new = realloc(old, ALLOCSIZE(sz));
+ if (!new)
+ return 0;
+ if (new != old)
+ (new->prev = copy.prev)->next = (new->next = copy.next)->prev = new;
+ return new->buf;
+ }
+ else
+ return sanei_hp_alloc(sz);
+}
+
+void
+sanei_hp_free (void * ptr)
+{
+ Alloc * old = VOID_TO_ALLOCP(ptr);
+
+ assert(old && old != head);
+ (old->next->prev = old->prev)->next = old->next;
+ old->next = old->prev = 0; /* so we can puke on multiple free's */
+ free(old);
+}
+
+void
+sanei_hp_free_all (void)
+{
+ Alloc * ptr;
+ Alloc * next;
+
+ for (ptr = head->next; ptr != head; ptr = next)
+ {
+ next = ptr->next;
+ free(ptr);
+ }
+ head->next = head->prev = head;
+}