diff options
Diffstat (limited to 'Build/source/libs/harfbuzz/harfbuzz-0.9.15/src/hb-blob.cc')
-rw-r--r-- | Build/source/libs/harfbuzz/harfbuzz-0.9.15/src/hb-blob.cc | 328 |
1 files changed, 0 insertions, 328 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-0.9.15/src/hb-blob.cc b/Build/source/libs/harfbuzz/harfbuzz-0.9.15/src/hb-blob.cc deleted file mode 100644 index dfd134b7762..00000000000 --- a/Build/source/libs/harfbuzz/harfbuzz-0.9.15/src/hb-blob.cc +++ /dev/null @@ -1,328 +0,0 @@ -/* - * Copyright © 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 - */ - -/* http://www.oracle.com/technetwork/articles/servers-storage-dev/standardheaderfiles-453865.html */ -#define _POSIX_C_SOURCE 199309L - -#include "hb-private.hh" - -#include "hb-blob.h" -#include "hb-object-private.hh" - -#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> - - - -#ifndef HB_DEBUG_BLOB -#define HB_DEBUG_BLOB (HB_DEBUG+0) -#endif - - -struct hb_blob_t { - hb_object_header_t header; - ASSERT_POD (); - - bool immutable; - - const char *data; - unsigned int length; - hb_memory_mode_t mode; - - void *user_data; - hb_destroy_func_t destroy; -}; - - -static bool _try_writable (hb_blob_t *blob); - -static void -_hb_blob_destroy_user_data (hb_blob_t *blob) -{ - if (blob->destroy) { - blob->destroy (blob->user_data); - blob->user_data = NULL; - blob->destroy = NULL; - } -} - -hb_blob_t * -hb_blob_create (const char *data, - unsigned int length, - hb_memory_mode_t mode, - void *user_data, - hb_destroy_func_t destroy) -{ - hb_blob_t *blob; - - if (!length || !(blob = hb_object_create<hb_blob_t> ())) { - if (destroy) - destroy (user_data); - return hb_blob_get_empty (); - } - - blob->data = data; - blob->length = length; - blob->mode = mode; - - blob->user_data = user_data; - blob->destroy = destroy; - - if (blob->mode == HB_MEMORY_MODE_DUPLICATE) { - blob->mode = HB_MEMORY_MODE_READONLY; - if (!_try_writable (blob)) { - hb_blob_destroy (blob); - return hb_blob_get_empty (); - } - } - - return blob; -} - -hb_blob_t * -hb_blob_create_sub_blob (hb_blob_t *parent, - unsigned int offset, - unsigned int length) -{ - hb_blob_t *blob; - - if (!length || offset >= parent->length) - return hb_blob_get_empty (); - - hb_blob_make_immutable (parent); - - blob = hb_blob_create (parent->data + offset, - MIN (length, parent->length - offset), - HB_MEMORY_MODE_READONLY, - hb_blob_reference (parent), - (hb_destroy_func_t) hb_blob_destroy); - - return blob; -} - -hb_blob_t * -hb_blob_get_empty (void) -{ - static const hb_blob_t _hb_blob_nil = { - HB_OBJECT_HEADER_STATIC, - - true, /* immutable */ - - NULL, /* data */ - 0, /* length */ - HB_MEMORY_MODE_READONLY, /* mode */ - - NULL, /* user_data */ - NULL /* destroy */ - }; - - return const_cast<hb_blob_t *> (&_hb_blob_nil); -} - -hb_blob_t * -hb_blob_reference (hb_blob_t *blob) -{ - return hb_object_reference (blob); -} - -void -hb_blob_destroy (hb_blob_t *blob) -{ - if (!hb_object_destroy (blob)) return; - - _hb_blob_destroy_user_data (blob); - - free (blob); -} - -hb_bool_t -hb_blob_set_user_data (hb_blob_t *blob, - hb_user_data_key_t *key, - void * data, - hb_destroy_func_t destroy, - hb_bool_t replace) -{ - return hb_object_set_user_data (blob, key, data, destroy, replace); -} - -void * -hb_blob_get_user_data (hb_blob_t *blob, - hb_user_data_key_t *key) -{ - return hb_object_get_user_data (blob, key); -} - - -void -hb_blob_make_immutable (hb_blob_t *blob) -{ - if (hb_object_is_inert (blob)) - return; - - blob->immutable = true; -} - -hb_bool_t -hb_blob_is_immutable (hb_blob_t *blob) -{ - return blob->immutable; -} - - -unsigned int -hb_blob_get_length (hb_blob_t *blob) -{ - return blob->length; -} - -const char * -hb_blob_get_data (hb_blob_t *blob, unsigned int *length) -{ - if (length) - *length = blob->length; - - return blob->data; -} - -char * -hb_blob_get_data_writable (hb_blob_t *blob, unsigned int *length) -{ - if (!_try_writable (blob)) { - if (length) - *length = 0; - - return NULL; - } - - if (length) - *length = blob->length; - - return const_cast<char *> (blob->data); -} - - -static hb_bool_t -_try_make_writable_inplace_unix (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) { - DEBUG_MSG_FUNC (BLOB, blob, "failed to get pagesize: %s", strerror (errno)); - return false; - } - DEBUG_MSG_FUNC (BLOB, blob, "pagesize is %lu", (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; - DEBUG_MSG_FUNC (BLOB, blob, - "calling mprotect on [%p..%p] (%lu bytes)", - addr, addr+length, (unsigned long) length); - if (-1 == mprotect ((void *) addr, length, PROT_READ | PROT_WRITE)) { - DEBUG_MSG_FUNC (BLOB, blob, "mprotect failed: %s", strerror (errno)); - return false; - } - - blob->mode = HB_MEMORY_MODE_WRITABLE; - - DEBUG_MSG_FUNC (BLOB, blob, - "successfully made [%p..%p] (%lu bytes) writable\n", - addr, addr+length, (unsigned long) length); - return true; -#else - return false; -#endif -} - -static bool -_try_writable_inplace (hb_blob_t *blob) -{ - DEBUG_MSG_FUNC (BLOB, blob, "making writable inplace\n"); - - if (_try_make_writable_inplace_unix (blob)) - return true; - - DEBUG_MSG_FUNC (BLOB, blob, "making writable -> FAILED\n"); - - /* Failed to make writable inplace, mark that */ - blob->mode = HB_MEMORY_MODE_READONLY; - return false; -} - -static bool -_try_writable (hb_blob_t *blob) -{ - if (blob->immutable) - return false; - - if (blob->mode == HB_MEMORY_MODE_WRITABLE) - return true; - - if (blob->mode == HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE && _try_writable_inplace (blob)) - return true; - - if (blob->mode == HB_MEMORY_MODE_WRITABLE) - return true; - - - DEBUG_MSG_FUNC (BLOB, blob, "current data is -> %p\n", blob->data); - - char *new_data; - - new_data = (char *) malloc (blob->length); - if (unlikely (!new_data)) - return false; - - DEBUG_MSG_FUNC (BLOB, blob, "dupped successfully -> %p\n", 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->user_data = new_data; - blob->destroy = free; - - return true; -} - - |