Update harfbuzz-ng to 1a5a91dc0d8bf4b72a2f22dc6300b06ad7000b79.

third_party/harfbuzz-ng/src/hb-blob.c

Index: third_party/harfbuzz-ng/src/hb-blob.c
diff --git a/third_party/harfbuzz-ng/src/hb-blob.c b/third_party/harfbuzz-ng/src/hb-blob.c
deleted file mode 100644
index 37e7787102814e1f4c97e348c6710fa7f6a4e748..0000000000000000000000000000000000000000
--- a/third_party/harfbuzz-ng/src/hb-blob.c
+++ /dev/null
@@ -1,362 +0,0 @@
-/*
- * Copyright (C) 2009  Red Hat, Inc.
- *
- *  This is part of HarfBuzz, a text shaping 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-private.h"
-
-#ifdef HAVE_SYS_MMAN_H
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif /* HAVE_UNISTD_H */
-#include <sys/mman.h>
-#endif /* HAVE_SYS_MMAN_H */
-
-#include <stdio.h>
-#include <errno.h>
-
-HB_BEGIN_DECLS
-
-
-#ifndef HB_DEBUG_BLOB
-#define HB_DEBUG_BLOB (HB_DEBUG+0)
-#endif
-
-hb_blob_t _hb_blob_nil = {
-  HB_REFERENCE_COUNT_INVALID, /* ref_count */
-
-  0, /* length */
-
-  HB_MUTEX_INIT, /* lock */
-
-  0, /* lock_count */
-  HB_MEMORY_MODE_READONLY, /* mode */
-
-  NULL, /* data */
-
-  NULL, /* destroy */
-  NULL /* user_data */
-};
-
-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;
-  }
-}
-
-static void
-_hb_blob_unlock_and_destroy (hb_blob_t *blob)
-{
-  hb_blob_unlock (blob);
-  hb_blob_destroy (blob);
-}
-
-hb_blob_t *
-hb_blob_create (const char        *data,
-		unsigned int       length,
-		hb_memory_mode_t   mode,
-		hb_destroy_func_t  destroy,
-		void              *user_data)
-{
-  hb_blob_t *blob;
-
-  if (!length || !HB_OBJECT_DO_CREATE (hb_blob_t, blob)) {
-    if (destroy)
-      destroy (user_data);
-    return &_hb_blob_nil;
-  }
-
-  hb_mutex_init (blob->lock);
-  blob->lock_count = 0;
-
-  blob->data = data;
-  blob->length = length;
-  blob->mode = mode;
-
-  blob->destroy = destroy;
-  blob->user_data = user_data;
-
-  if (blob->mode == HB_MEMORY_MODE_DUPLICATE) {
-    blob->mode = HB_MEMORY_MODE_READONLY;
-    if (!hb_blob_try_writable (blob)) {
-      hb_blob_destroy (blob);
-      return &_hb_blob_nil;
-    }
-  }
-
-  return blob;
-}
-
-hb_blob_t *
-hb_blob_create_sub_blob (hb_blob_t    *parent,
-			 unsigned int  offset,
-			 unsigned int  length)
-{
-  hb_blob_t *blob;
-  const char *pdata;
-
-  if (!length || offset >= parent->length || !HB_OBJECT_DO_CREATE (hb_blob_t, blob))
-    return &_hb_blob_nil;
-
-  pdata = hb_blob_lock (parent);
-
-  blob->data = pdata + offset;
-  blob->length = MIN (length, parent->length - offset);
-
-  hb_mutex_lock (parent->lock);
-  blob->mode = parent->mode;
-  hb_mutex_unlock (parent->lock);
-
-  blob->destroy = (hb_destroy_func_t) _hb_blob_unlock_and_destroy;
-  blob->user_data = hb_blob_reference (parent);
-
-  return blob;
-}
-
-hb_blob_t *
-hb_blob_create_empty (void)
-{
-  return &_hb_blob_nil;
-}
-
-hb_blob_t *
-hb_blob_reference (hb_blob_t *blob)
-{
-  HB_OBJECT_DO_REFERENCE (blob);
-}
-
-unsigned int
-hb_blob_get_reference_count (hb_blob_t *blob)
-{
-  HB_OBJECT_DO_GET_REFERENCE_COUNT (blob);
-}
-
-void
-hb_blob_destroy (hb_blob_t *blob)
-{
-  HB_OBJECT_DO_DESTROY (blob);
-
-  _hb_blob_destroy_user_data (blob);
-
-  free (blob);
-}
-
-unsigned int
-hb_blob_get_length (hb_blob_t *blob)
-{
-  return blob->length;
-}
-
-const char *
-hb_blob_lock (hb_blob_t *blob)
-{
-  if (HB_OBJECT_IS_INERT (blob))
-    return NULL;
-
-  hb_mutex_lock (blob->lock);
-
-  (void) (HB_DEBUG_BLOB &&
-    fprintf (stderr, "%p %s (%d) -> %p\n", blob, __FUNCTION__,
-	     blob->lock_count, blob->data));
-
-  blob->lock_count++;
-
-  hb_mutex_unlock (blob->lock);
-
-  return blob->data;
-}
-
-void
-hb_blob_unlock (hb_blob_t *blob)
-{
-  if (HB_OBJECT_IS_INERT (blob))
-    return;
-
-  hb_mutex_lock (blob->lock);
-
-  (void) (HB_DEBUG_BLOB &&
-    fprintf (stderr, "%p %s (%d) -> %p\n", blob, __FUNCTION__,
-	     blob->lock_count, blob->data));
-
-  assert (blob->lock_count > 0);
-  blob->lock_count--;
-
-  hb_mutex_unlock (blob->lock);
-}
-
-hb_bool_t
-hb_blob_is_writable (hb_blob_t *blob)
-{
-  hb_memory_mode_t mode;
-
-  if (HB_OBJECT_IS_INERT (blob))
-    return FALSE;
-
-  hb_mutex_lock (blob->lock);
-
-  mode = blob->mode;
-
-  hb_mutex_unlock (blob->lock);
-
-  return mode == HB_MEMORY_MODE_WRITABLE;
-}
-
-
-static hb_bool_t
-_try_make_writable_inplace_unix_locked (hb_blob_t *blob)
-{
-#if defined(HAVE_SYS_MMAN_H) && defined(HAVE_MPROTECT)
-  uintptr_t pagesize = -1, mask, length;
-  const char *addr;
-
-#if defined(HAVE_SYSCONF) && defined(_SC_PAGE_SIZE)
-  pagesize = (uintptr_t) sysconf (_SC_PAGE_SIZE);
-#elif defined(HAVE_SYSCONF) && defined(_SC_PAGESIZE)
-  pagesize = (uintptr_t) sysconf (_SC_PAGESIZE);
-#elif defined(HAVE_GETPAGESIZE)
-  pagesize = (uintptr_t) getpagesize ();
-#endif
-
-  if ((uintptr_t) -1L == pagesize) {
-    (void) (HB_DEBUG_BLOB &&
-      fprintf (stderr, "%p %s: failed to get pagesize: %s\n", blob, __FUNCTION__, strerror (errno)));
-    return FALSE;
-  }
-  (void) (HB_DEBUG_BLOB &&
-    fprintf (stderr, "%p %s: pagesize is %lu\n", blob, __FUNCTION__, (unsigned long) pagesize));
-
-  mask = ~(pagesize-1);
-  addr = (const char *) (((uintptr_t) blob->data) & mask);
-  length = (const char *) (((uintptr_t) blob->data + blob->length + pagesize-1) & mask)  - addr;
-  (void) (HB_DEBUG_BLOB &&
-    fprintf (stderr, "%p %s: calling mprotect on [%p..%p] (%lu bytes)\n",
-	     blob, __FUNCTION__,
-	     addr, addr+length, (unsigned long) length));
-  if (-1 == mprotect ((void *) addr, length, PROT_READ | PROT_WRITE)) {
-    (void) (HB_DEBUG_BLOB &&
-      fprintf (stderr, "%p %s: %s\n", blob, __FUNCTION__, strerror (errno)));
-    return FALSE;
-  }
-
-  (void) (HB_DEBUG_BLOB &&
-    fprintf (stderr, "%p %s: successfully made [%p..%p] (%lu bytes) writable\n",
-	     blob, __FUNCTION__,
-	     addr, addr+length, (unsigned long) length));
-  return TRUE;
-#else
-  return FALSE;
-#endif
-}
-
-static void
-try_writable_inplace_locked (hb_blob_t *blob)
-{
-  (void) (HB_DEBUG_BLOB &&
-    fprintf (stderr, "%p %s: making writable\n", blob, __FUNCTION__));
-
-  if (_try_make_writable_inplace_unix_locked (blob)) {
-    (void) (HB_DEBUG_BLOB &&
-      fprintf (stderr, "%p %s: making writable -> succeeded\n", blob, __FUNCTION__));
-    blob->mode = HB_MEMORY_MODE_WRITABLE;
-  } else {
-    (void) (HB_DEBUG_BLOB &&
-      fprintf (stderr, "%p %s: making writable -> FAILED\n", blob, __FUNCTION__));
-    /* Failed to make writable inplace, mark that */
-    blob->mode = HB_MEMORY_MODE_READONLY;
-  }
-}
-
-hb_bool_t
-hb_blob_try_writable_inplace (hb_blob_t *blob)
-{
-  hb_memory_mode_t mode;
-
-  if (HB_OBJECT_IS_INERT (blob))
-    return FALSE;
-
-  hb_mutex_lock (blob->lock);
-
-  if (blob->mode == HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE)
-    try_writable_inplace_locked (blob);
-
-  mode = blob->mode;
-
-  hb_mutex_unlock (blob->lock);
-
-  return mode == HB_MEMORY_MODE_WRITABLE;
-}
-
-hb_bool_t
-hb_blob_try_writable (hb_blob_t *blob)
-{
-  hb_memory_mode_t mode;
-
-  if (HB_OBJECT_IS_INERT (blob))
-    return FALSE;
-
-  hb_mutex_lock (blob->lock);
-
-  if (blob->mode == HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE)
-    try_writable_inplace_locked (blob);
-
-  if (blob->mode == HB_MEMORY_MODE_READONLY)
-  {
-    char *new_data;
-
-    (void) (HB_DEBUG_BLOB &&
-      fprintf (stderr, "%p %s (%d) -> %p\n", blob, __FUNCTION__,
-	       blob->lock_count, blob->data));
-
-    if (blob->lock_count)
-      goto done;
-
-    new_data = malloc (blob->length);
-    if (new_data) {
-      (void) (HB_DEBUG_BLOB &&
-	fprintf (stderr, "%p %s: dupped successfully -> %p\n", blob, __FUNCTION__, blob->data));
-      memcpy (new_data, blob->data, blob->length);
-      _hb_blob_destroy_user_data (blob);
-      blob->mode = HB_MEMORY_MODE_WRITABLE;
-      blob->data = new_data;
-      blob->destroy = free;
-      blob->user_data = new_data;
-    }
-  }
-
-done:
-  mode = blob->mode;
-
-  hb_mutex_unlock (blob->lock);
-
-  return mode == HB_MEMORY_MODE_WRITABLE;
-}
-
-
-HB_END_DECLS