[HB] Add a "blob" manager
This commit is contained in:
parent
02a370697d
commit
f0954d1e08
|
@ -11,6 +11,7 @@ CXX = gcc -g -O2 -fno-rtti -fno-exceptions -Wabi -Wpadded -Wcast-align
|
||||||
noinst_LTLIBRARIES = libharfbuzz-1.la
|
noinst_LTLIBRARIES = libharfbuzz-1.la
|
||||||
|
|
||||||
HBSOURCES = \
|
HBSOURCES = \
|
||||||
|
hb-blob.c \
|
||||||
hb-buffer.c \
|
hb-buffer.c \
|
||||||
hb-buffer-private.h \
|
hb-buffer-private.h \
|
||||||
hb-private.h \
|
hb-private.h \
|
||||||
|
@ -22,11 +23,13 @@ HBSOURCES = \
|
||||||
hb-ot-layout-gsub-private.h \
|
hb-ot-layout-gsub-private.h \
|
||||||
hb-ot-layout-open-private.h \
|
hb-ot-layout-open-private.h \
|
||||||
hb-ot-layout-private.h \
|
hb-ot-layout-private.h \
|
||||||
|
hb-refcount-private.h \
|
||||||
$(NULL)
|
$(NULL)
|
||||||
|
|
||||||
HBHEADERS = \
|
HBHEADERS = \
|
||||||
hb-common.h \
|
hb-blob.h \
|
||||||
hb-buffer.h \
|
hb-buffer.h \
|
||||||
|
hb-common.h \
|
||||||
hb-ot-layout.h \
|
hb-ot-layout.h \
|
||||||
$(NULL)
|
$(NULL)
|
||||||
|
|
||||||
|
|
|
@ -0,0 +1,181 @@
|
||||||
|
/*
|
||||||
|
* Copyright (C) 2009 Red Hat, Inc.
|
||||||
|
*
|
||||||
|
* This is part of HarfBuzz, an OpenType Layout engine library.
|
||||||
|
*
|
||||||
|
* Permission is hereby granted, without written agreement and without
|
||||||
|
* license or royalty fees, to use, copy, modify, and distribute this
|
||||||
|
* software and its documentation for any purpose, provided that the
|
||||||
|
* above copyright notice and the following two paragraphs appear in
|
||||||
|
* all copies of this software.
|
||||||
|
*
|
||||||
|
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
|
||||||
|
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
|
||||||
|
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
|
||||||
|
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
|
||||||
|
* DAMAGE.
|
||||||
|
*
|
||||||
|
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
|
||||||
|
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
|
||||||
|
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
|
||||||
|
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
|
||||||
|
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
|
||||||
|
*
|
||||||
|
* Red Hat Author(s): Behdad Esfahbod
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include "hb-private.h"
|
||||||
|
|
||||||
|
#include "hb-blob.h"
|
||||||
|
#include "hb-refcount-private.h"
|
||||||
|
|
||||||
|
struct _hb_blob_t {
|
||||||
|
const char *data;
|
||||||
|
unsigned int len;
|
||||||
|
hb_memory_mode_t mode;
|
||||||
|
|
||||||
|
hb_reference_count_t ref_count;
|
||||||
|
hb_destroy_func_t destroy;
|
||||||
|
void *user_data;
|
||||||
|
};
|
||||||
|
static hb_blob_t _hb_blob_nil = {
|
||||||
|
NULL,
|
||||||
|
0,
|
||||||
|
HB_MEMORY_MODE_READONLY,
|
||||||
|
|
||||||
|
HB_REFERENCE_COUNT_INVALID,
|
||||||
|
NULL,
|
||||||
|
NULL
|
||||||
|
};
|
||||||
|
|
||||||
|
static void
|
||||||
|
_hb_blob_destroy_user_data (hb_blob_t *blob)
|
||||||
|
{
|
||||||
|
if (blob->destroy) {
|
||||||
|
blob->destroy (blob->user_data);
|
||||||
|
blob->destroy = NULL;
|
||||||
|
blob->user_data = NULL;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
hb_blob_t *
|
||||||
|
hb_blob_create (const char *data,
|
||||||
|
unsigned int len,
|
||||||
|
hb_memory_mode_t mode,
|
||||||
|
hb_destroy_func_t destroy,
|
||||||
|
void *user_data)
|
||||||
|
{
|
||||||
|
hb_blob_t *blob;
|
||||||
|
|
||||||
|
blob = malloc (sizeof (hb_blob_t));
|
||||||
|
if (!blob) {
|
||||||
|
if (destroy)
|
||||||
|
destroy (user_data);
|
||||||
|
return &_hb_blob_nil;
|
||||||
|
}
|
||||||
|
|
||||||
|
blob->data = data;
|
||||||
|
blob->len = len;
|
||||||
|
blob->mode = mode;
|
||||||
|
|
||||||
|
HB_REFERENCE_COUNT_INIT (blob->ref_count, 1);
|
||||||
|
blob->destroy = destroy;
|
||||||
|
blob->user_data = user_data;
|
||||||
|
|
||||||
|
if (blob->mode == HB_MEMORY_MODE_DUPLICATE) {
|
||||||
|
blob->mode = HB_MEMORY_MODE_READONLY;
|
||||||
|
hb_blob_make_writeable (blob);
|
||||||
|
}
|
||||||
|
|
||||||
|
return blob;
|
||||||
|
}
|
||||||
|
|
||||||
|
hb_blob_t *
|
||||||
|
hb_blob_reference (hb_blob_t *blob)
|
||||||
|
{
|
||||||
|
if (blob == NULL || HB_REFERENCE_COUNT_IS_INVALID (blob->ref_count))
|
||||||
|
return blob;
|
||||||
|
|
||||||
|
assert (HB_REFERENCE_COUNT_HAS_REFERENCE (blob->ref_count));
|
||||||
|
|
||||||
|
_hb_reference_count_inc (blob->ref_count);
|
||||||
|
|
||||||
|
return blob;
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
hb_blob_destroy (hb_blob_t *blob)
|
||||||
|
{
|
||||||
|
if (blob == NULL || HB_REFERENCE_COUNT_IS_INVALID (blob->ref_count))
|
||||||
|
return;
|
||||||
|
|
||||||
|
assert (HB_REFERENCE_COUNT_HAS_REFERENCE (blob->ref_count));
|
||||||
|
|
||||||
|
if (!_hb_reference_count_dec_and_test (blob->ref_count))
|
||||||
|
return;
|
||||||
|
|
||||||
|
_hb_blob_destroy_user_data (blob);
|
||||||
|
|
||||||
|
free (blob);
|
||||||
|
}
|
||||||
|
|
||||||
|
const char *
|
||||||
|
hb_blob_get_data (hb_blob_t *blob,
|
||||||
|
unsigned int *len)
|
||||||
|
{
|
||||||
|
if (len)
|
||||||
|
*len = blob->len;
|
||||||
|
|
||||||
|
return blob->data;
|
||||||
|
}
|
||||||
|
|
||||||
|
hb_bool_t
|
||||||
|
hb_blob_is_writeable (hb_blob_t *blob)
|
||||||
|
{
|
||||||
|
return blob->mode == HB_MEMORY_MODE_WRITEABLE;
|
||||||
|
}
|
||||||
|
|
||||||
|
hb_bool_t
|
||||||
|
hb_blob_try_writeable_inplace (hb_blob_t *blob)
|
||||||
|
{
|
||||||
|
if (blob->mode == HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITEABLE) {
|
||||||
|
/* XXX
|
||||||
|
* mprotect
|
||||||
|
blob->mode == HB_MEMORY_MODE_WRITEABLE;
|
||||||
|
*/
|
||||||
|
}
|
||||||
|
|
||||||
|
return blob->mode == HB_MEMORY_MODE_WRITEABLE;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* DANGER: May rebase or nullify */
|
||||||
|
void
|
||||||
|
hb_blob_make_writeable (hb_blob_t *blob)
|
||||||
|
{
|
||||||
|
if (blob->mode == HB_MEMORY_MODE_READONLY_NEVER_DUPLICATE)
|
||||||
|
{
|
||||||
|
_hb_blob_destroy_user_data (blob);
|
||||||
|
blob->data = NULL;
|
||||||
|
blob->len = 0;
|
||||||
|
}
|
||||||
|
else if (blob->mode == HB_MEMORY_MODE_READONLY)
|
||||||
|
{
|
||||||
|
char *new_data;
|
||||||
|
|
||||||
|
new_data = malloc (blob->len);
|
||||||
|
if (new_data)
|
||||||
|
memcpy (new_data, blob->data, blob->len);
|
||||||
|
|
||||||
|
_hb_blob_destroy_user_data (blob);
|
||||||
|
|
||||||
|
if (!new_data) {
|
||||||
|
blob->data = NULL;
|
||||||
|
blob->len = 0;
|
||||||
|
} else
|
||||||
|
blob->data = new_data;
|
||||||
|
|
||||||
|
blob->mode = HB_MEMORY_MODE_WRITEABLE;
|
||||||
|
}
|
||||||
|
else
|
||||||
|
hb_blob_try_writeable_inplace (blob);
|
||||||
|
}
|
|
@ -0,0 +1,74 @@
|
||||||
|
/*
|
||||||
|
* Copyright (C) 2009 Red Hat, Inc.
|
||||||
|
*
|
||||||
|
* This is part of HarfBuzz, an OpenType Layout engine library.
|
||||||
|
*
|
||||||
|
* Permission is hereby granted, without written agreement and without
|
||||||
|
* license or royalty fees, to use, copy, modify, and distribute this
|
||||||
|
* software and its documentation for any purpose, provided that the
|
||||||
|
* above copyright notice and the following two paragraphs appear in
|
||||||
|
* all copies of this software.
|
||||||
|
*
|
||||||
|
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
|
||||||
|
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
|
||||||
|
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
|
||||||
|
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
|
||||||
|
* DAMAGE.
|
||||||
|
*
|
||||||
|
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
|
||||||
|
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
|
||||||
|
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
|
||||||
|
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
|
||||||
|
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
|
||||||
|
*
|
||||||
|
* Red Hat Author(s): Behdad Esfahbod
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef HB_BLOB_H
|
||||||
|
#define HB_BLOB_H
|
||||||
|
|
||||||
|
#include "hb-common.h"
|
||||||
|
|
||||||
|
HB_BEGIN_DECLS
|
||||||
|
|
||||||
|
typedef struct _hb_blob_t hb_blob_t;
|
||||||
|
typedef void (*hb_destroy_func_t) (void *user_data);
|
||||||
|
|
||||||
|
typedef enum {
|
||||||
|
HB_MEMORY_MODE_DUPLICATE,
|
||||||
|
HB_MEMORY_MODE_READONLY,
|
||||||
|
HB_MEMORY_MODE_WRITEABLE,
|
||||||
|
HB_MEMORY_MODE_READONLY_NEVER_DUPLICATE,
|
||||||
|
HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITEABLE,
|
||||||
|
} hb_memory_mode_t;
|
||||||
|
|
||||||
|
hb_blob_t *
|
||||||
|
hb_blob_create (const char *data,
|
||||||
|
unsigned int len,
|
||||||
|
hb_memory_mode_t mode,
|
||||||
|
hb_destroy_func_t destroy,
|
||||||
|
void *user_data);
|
||||||
|
|
||||||
|
hb_blob_t *
|
||||||
|
hb_blob_reference (hb_blob_t *blob);
|
||||||
|
|
||||||
|
void
|
||||||
|
hb_blob_destroy (hb_blob_t *blob);
|
||||||
|
|
||||||
|
const char *
|
||||||
|
hb_blob_get_data (hb_blob_t *blob,
|
||||||
|
unsigned int *len);
|
||||||
|
|
||||||
|
hb_bool_t
|
||||||
|
hb_blob_is_writeable (hb_blob_t *blob);
|
||||||
|
|
||||||
|
hb_bool_t
|
||||||
|
hb_blob_try_writeable_inplace (hb_blob_t *blob);
|
||||||
|
|
||||||
|
/* DANGER: May rebase or nullify */
|
||||||
|
void
|
||||||
|
hb_blob_make_writeable (hb_blob_t *blob);
|
||||||
|
|
||||||
|
HB_END_DECLS
|
||||||
|
|
||||||
|
#endif /* HB_BLOB_H */
|
|
@ -49,6 +49,8 @@
|
||||||
|
|
||||||
#include <stdlib.h>
|
#include <stdlib.h>
|
||||||
#include <stdio.h> /* XXX */
|
#include <stdio.h> /* XXX */
|
||||||
|
#include <string.h>
|
||||||
|
#include <assert.h>
|
||||||
|
|
||||||
/* Basics */
|
/* Basics */
|
||||||
|
|
||||||
|
|
|
@ -0,0 +1,54 @@
|
||||||
|
/*
|
||||||
|
* Copyright © 2007 Chris Wilson
|
||||||
|
*
|
||||||
|
* This is part of HarfBuzz, an OpenType Layout engine library.
|
||||||
|
*
|
||||||
|
* Permission is hereby granted, without written agreement and without
|
||||||
|
* license or royalty fees, to use, copy, modify, and distribute this
|
||||||
|
* software and its documentation for any purpose, provided that the
|
||||||
|
* above copyright notice and the following two paragraphs appear in
|
||||||
|
* all copies of this software.
|
||||||
|
*
|
||||||
|
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
|
||||||
|
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
|
||||||
|
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
|
||||||
|
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
|
||||||
|
* DAMAGE.
|
||||||
|
*
|
||||||
|
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
|
||||||
|
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
|
||||||
|
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
|
||||||
|
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
|
||||||
|
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
|
||||||
|
*
|
||||||
|
* Contributor(s):
|
||||||
|
* Chris Wilson <chris@chris-wilson.co.uk>
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef HB_REFCOUNT_PRIVATE_H
|
||||||
|
#define HB_REFCOUNT_PRIVATE_H
|
||||||
|
|
||||||
|
typedef int hb_atomic_int_t;
|
||||||
|
|
||||||
|
/* Encapsulate operations on the object's reference count */
|
||||||
|
typedef struct {
|
||||||
|
hb_atomic_int_t ref_count;
|
||||||
|
} hb_reference_count_t;
|
||||||
|
|
||||||
|
/* XXX add real atomic ops */
|
||||||
|
#define _hb_reference_count_inc(RC) ((RC).ref_count++)
|
||||||
|
#define _hb_reference_count_dec_and_test(RC) ((RC).ref_count-- == 1)
|
||||||
|
|
||||||
|
#define HB_REFERENCE_COUNT_INIT(RC, VALUE) ((RC).ref_count = (VALUE))
|
||||||
|
|
||||||
|
#define HB_REFERENCE_COUNT_GET_VALUE(RC) ((RC).ref_count+0)
|
||||||
|
#define HB_REFERENCE_COUNT_SET_VALUE(RC, VALUE) ((RC).ref_count = (VALUE), 0)
|
||||||
|
|
||||||
|
#define HB_REFERENCE_COUNT_INVALID_VALUE ((hb_atomic_int_t) -1)
|
||||||
|
#define HB_REFERENCE_COUNT_INVALID {HB_REFERENCE_COUNT_INVALID_VALUE}
|
||||||
|
|
||||||
|
#define HB_REFERENCE_COUNT_IS_INVALID(RC) (HB_REFERENCE_COUNT_GET_VALUE (RC) == HB_REFERENCE_COUNT_INVALID_VALUE)
|
||||||
|
|
||||||
|
#define HB_REFERENCE_COUNT_HAS_REFERENCE(RC) (HB_REFERENCE_COUNT_GET_VALUE (RC) > 0)
|
||||||
|
|
||||||
|
#endif /* HB_REFCOUNT_PRIVATE_H */
|
Loading…
Reference in New Issue