From 6e9c41a892ed0e0da326e0278b3221ce3f5713b8 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=B6rg=20Frings-F=C3=BCrst?= Date: Mon, 6 Oct 2014 14:00:40 +0200 Subject: Initial import of sane-backends version 1.0.24-1.2 --- backend/hp-hpmem.c | 151 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 151 insertions(+) create mode 100644 backend/hp-hpmem.c (limited to 'backend/hp-hpmem.c') 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 +#include +#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; +} -- cgit v1.2.3