diff options
Diffstat (limited to 'Build/source/libs/harfbuzz/harfbuzz-src/src/hb-blob.cc')
-rw-r--r-- | Build/source/libs/harfbuzz/harfbuzz-src/src/hb-blob.cc | 723 |
1 files changed, 0 insertions, 723 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-blob.cc b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-blob.cc deleted file mode 100644 index e340bc346d3..00000000000 --- a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-blob.cc +++ /dev/null @@ -1,723 +0,0 @@ -/* - * Copyright © 2009 Red Hat, Inc. - * Copyright © 2018 Ebrahim Byagowi - * - * 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.hh" -#include "hb-blob.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 <stdlib.h> - - -/** - * SECTION: hb-blob - * @title: hb-blob - * @short_description: Binary data containers - * @include: hb.h - * - * Blobs wrap a chunk of binary data to handle lifecycle management of data - * while it is passed between client and HarfBuzz. Blobs are primarily used - * to create font faces, but also to access font face tables, as well as - * pass around other binary data. - **/ - - -/** - * hb_blob_create: (skip) - * @data: Pointer to blob data. - * @length: Length of @data in bytes. - * @mode: Memory mode for @data. - * @user_data: Data parameter to pass to @destroy. - * @destroy: (optional): Callback to call when @data is not needed anymore. - * - * Creates a new "blob" object wrapping @data. The @mode parameter is used - * to negotiate ownership and lifecycle of @data. - * - * Return value: New blob, or the empty blob if something failed or if @length is - * zero. Destroy with hb_blob_destroy(). - * - * Since: 0.9.2 - **/ -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 || - length >= 1u << 31 || - !(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 (!blob->try_make_writable ()) { - hb_blob_destroy (blob); - return hb_blob_get_empty (); - } - } - - return blob; -} - -static void -_hb_blob_destroy (void *data) -{ - hb_blob_destroy ((hb_blob_t *) data); -} - -/** - * hb_blob_create_sub_blob: - * @parent: Parent blob. - * @offset: Start offset of sub-blob within @parent, in bytes. - * @length: Length of sub-blob. - * - * Returns a blob that represents a range of bytes in @parent. The new - * blob is always created with %HB_MEMORY_MODE_READONLY, meaning that it - * will never modify data in the parent blob. The parent data is not - * expected to be modified, and will result in undefined behavior if it - * is. - * - * Makes @parent immutable. - * - * Return value: New blob, or the empty blob if something failed or if - * @length is zero or @offset is beyond the end of @parent's data. Destroy - * with hb_blob_destroy(). - * - * Since: 0.9.2 - **/ -hb_blob_t * -hb_blob_create_sub_blob (hb_blob_t *parent, - unsigned int offset, - unsigned int length) -{ - hb_blob_t *blob; - - if (!length || !parent || offset >= parent->length) - return hb_blob_get_empty (); - - hb_blob_make_immutable (parent); - - blob = hb_blob_create (parent->data + offset, - hb_min (length, parent->length - offset), - HB_MEMORY_MODE_READONLY, - hb_blob_reference (parent), - _hb_blob_destroy); - - return blob; -} - -/** - * hb_blob_copy_writable_or_fail: - * @blob: A blob. - * - * Makes a writable copy of @blob. - * - * Return value: The new blob, or nullptr if allocation failed - * - * Since: 1.8.0 - **/ -hb_blob_t * -hb_blob_copy_writable_or_fail (hb_blob_t *blob) -{ - blob = hb_blob_create (blob->data, - blob->length, - HB_MEMORY_MODE_DUPLICATE, - nullptr, - nullptr); - - if (unlikely (blob == hb_blob_get_empty ())) - blob = nullptr; - - return blob; -} - -/** - * hb_blob_get_empty: - * - * Returns the singleton empty blob. - * - * See TODO:link object types for more information. - * - * Return value: (transfer full): The empty blob. - * - * Since: 0.9.2 - **/ -hb_blob_t * -hb_blob_get_empty () -{ - return const_cast<hb_blob_t *> (&Null (hb_blob_t)); -} - -/** - * hb_blob_reference: (skip) - * @blob: a blob. - * - * Increases the reference count on @blob. - * - * See TODO:link object types for more information. - * - * Return value: @blob. - * - * Since: 0.9.2 - **/ -hb_blob_t * -hb_blob_reference (hb_blob_t *blob) -{ - return hb_object_reference (blob); -} - -/** - * hb_blob_destroy: (skip) - * @blob: a blob. - * - * Decreases the reference count on @blob, and if it reaches zero, destroys - * @blob, freeing all memory, possibly calling the destroy-callback the blob - * was created for if it has not been called already. - * - * See TODO:link object types for more information. - * - * Since: 0.9.2 - **/ -void -hb_blob_destroy (hb_blob_t *blob) -{ - if (!hb_object_destroy (blob)) return; - - blob->fini_shallow (); - - free (blob); -} - -/** - * hb_blob_set_user_data: (skip) - * @blob: An #hb_blob_t - * @key: The user-data key to set - * @data: A pointer to the user data to set - * @destroy: (optional): A callback to call when @data is not needed anymore - * @replace: Whether to replace an existing data with the same key - * - * Attaches a user-data key/data pair to the specified blob. - * - * Return value: %true if success, %false otherwise - * - * Since: 0.9.2 - **/ -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); -} - -/** - * hb_blob_get_user_data: (skip) - * @blob: a blob - * @key: The user-data key to query - * - * Fetches the user data associated with the specified key, - * attached to the specified font-functions structure. - * - * Return value: (transfer none): A pointer to the user data - * - * Since: 0.9.2 - **/ -void * -hb_blob_get_user_data (hb_blob_t *blob, - hb_user_data_key_t *key) -{ - return hb_object_get_user_data (blob, key); -} - - -/** - * hb_blob_make_immutable: - * @blob: a blob - * - * Makes a blob immutable. - * - * Since: 0.9.2 - **/ -void -hb_blob_make_immutable (hb_blob_t *blob) -{ - if (hb_object_is_immutable (blob)) - return; - - hb_object_make_immutable (blob); -} - -/** - * hb_blob_is_immutable: - * @blob: a blob. - * - * Tests whether a blob is immutable. - * - * Return value: %true if @blob is immutable, false otherwise - * - * Since: 0.9.2 - **/ -hb_bool_t -hb_blob_is_immutable (hb_blob_t *blob) -{ - return hb_object_is_immutable (blob); -} - - -/** - * hb_blob_get_length: - * @blob: a blob. - * - * Fetches the length of a blob's data. - * - * Return value: the length of @blob data in bytes. - * - * Since: 0.9.2 - **/ -unsigned int -hb_blob_get_length (hb_blob_t *blob) -{ - return blob->length; -} - -/** - * hb_blob_get_data: - * @blob: a blob. - * @length: (out): The length in bytes of the data retrieved - * - * Fetches the data from a blob. - * - * Returns: (transfer none) (array length=length): the byte data of @blob. - * - * Since: 0.9.2 - **/ -const char * -hb_blob_get_data (hb_blob_t *blob, unsigned int *length) -{ - if (length) - *length = blob->length; - - return blob->data; -} - -/** - * hb_blob_get_data_writable: - * @blob: a blob. - * @length: (out): output length of the writable data. - * - * Tries to make blob data writable (possibly copying it) and - * return pointer to data. - * - * Fails if blob has been made immutable, or if memory allocation - * fails. - * - * Returns: (transfer none) (array length=length): Writable blob data, - * or %NULL if failed. - * - * Since: 0.9.2 - **/ -char * -hb_blob_get_data_writable (hb_blob_t *blob, unsigned int *length) -{ - if (!blob->try_make_writable ()) { - if (length) - *length = 0; - - return nullptr; - } - - if (length) - *length = blob->length; - - return const_cast<char *> (blob->data); -} - - -bool -hb_blob_t::try_make_writable_inplace_unix () -{ -#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, this, "failed to get pagesize: %s", strerror (errno)); - return false; - } - DEBUG_MSG_FUNC (BLOB, this, "pagesize is %lu", (unsigned long) pagesize); - - mask = ~(pagesize-1); - addr = (const char *) (((uintptr_t) this->data) & mask); - length = (const char *) (((uintptr_t) this->data + this->length + pagesize-1) & mask) - addr; - DEBUG_MSG_FUNC (BLOB, this, - "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, this, "mprotect failed: %s", strerror (errno)); - return false; - } - - this->mode = HB_MEMORY_MODE_WRITABLE; - - DEBUG_MSG_FUNC (BLOB, this, - "successfully made [%p..%p] (%lu bytes) writable\n", - addr, addr+length, (unsigned long) length); - return true; -#else - return false; -#endif -} - -bool -hb_blob_t::try_make_writable_inplace () -{ - DEBUG_MSG_FUNC (BLOB, this, "making writable inplace\n"); - - if (this->try_make_writable_inplace_unix ()) - return true; - - DEBUG_MSG_FUNC (BLOB, this, "making writable -> FAILED\n"); - - /* Failed to make writable inplace, mark that */ - this->mode = HB_MEMORY_MODE_READONLY; - return false; -} - -bool -hb_blob_t::try_make_writable () -{ - if (hb_object_is_immutable (this)) - return false; - - if (this->mode == HB_MEMORY_MODE_WRITABLE) - return true; - - if (this->mode == HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE && this->try_make_writable_inplace ()) - return true; - - if (this->mode == HB_MEMORY_MODE_WRITABLE) - return true; - - - DEBUG_MSG_FUNC (BLOB, this, "current data is -> %p\n", this->data); - - char *new_data; - - new_data = (char *) malloc (this->length); - if (unlikely (!new_data)) - return false; - - DEBUG_MSG_FUNC (BLOB, this, "dupped successfully -> %p\n", this->data); - - memcpy (new_data, this->data, this->length); - this->destroy_user_data (); - this->mode = HB_MEMORY_MODE_WRITABLE; - this->data = new_data; - this->user_data = new_data; - this->destroy = free; - - return true; -} - -/* - * Mmap - */ - -#ifndef HB_NO_OPEN -#ifdef HAVE_MMAP -# if !defined(HB_NO_RESOURCE_FORK) && defined(__APPLE__) -# include <sys/paths.h> -# endif -# include <sys/types.h> -# include <sys/stat.h> -# include <fcntl.h> -#endif - -#ifdef _WIN32 -# include <windows.h> -#else -# ifndef O_BINARY -# define O_BINARY 0 -# endif -#endif - -#ifndef MAP_NORESERVE -# define MAP_NORESERVE 0 -#endif - -struct hb_mapped_file_t -{ - char *contents; - unsigned long length; -#ifdef _WIN32 - HANDLE mapping; -#endif -}; - -#if (defined(HAVE_MMAP) || defined(_WIN32)) && !defined(HB_NO_MMAP) -static void -_hb_mapped_file_destroy (void *file_) -{ - hb_mapped_file_t *file = (hb_mapped_file_t *) file_; -#ifdef HAVE_MMAP - munmap (file->contents, file->length); -#elif defined(_WIN32) - UnmapViewOfFile (file->contents); - CloseHandle (file->mapping); -#else - assert (0); // If we don't have mmap we shouldn't reach here -#endif - - free (file); -} -#endif - -#ifdef _PATH_RSRCFORKSPEC -static int -_open_resource_fork (const char *file_name, hb_mapped_file_t *file) -{ - size_t name_len = strlen (file_name); - size_t len = name_len + sizeof (_PATH_RSRCFORKSPEC); - - char *rsrc_name = (char *) malloc (len); - if (unlikely (!rsrc_name)) return -1; - - strncpy (rsrc_name, file_name, name_len); - strncpy (rsrc_name + name_len, _PATH_RSRCFORKSPEC, - sizeof (_PATH_RSRCFORKSPEC) - 1); - - int fd = open (rsrc_name, O_RDONLY | O_BINARY, 0); - free (rsrc_name); - - if (fd != -1) - { - struct stat st; - if (fstat (fd, &st) != -1) - file->length = (unsigned long) st.st_size; - else - { - close (fd); - fd = -1; - } - } - - return fd; -} -#endif - -/** - * hb_blob_create_from_file: - * @file_name: A font filename - * - * Creates a new blob containing the data from the - * specified binary font file. - * - * Returns: An #hb_blob_t pointer with the content of the file - * - * Since: 1.7.7 - **/ -hb_blob_t * -hb_blob_create_from_file (const char *file_name) -{ - /* Adopted from glib's gmappedfile.c with Matthias Clasen and - Allison Lortie permission but changed a lot to suit our need. */ -#if defined(HAVE_MMAP) && !defined(HB_NO_MMAP) - hb_mapped_file_t *file = (hb_mapped_file_t *) calloc (1, sizeof (hb_mapped_file_t)); - if (unlikely (!file)) return hb_blob_get_empty (); - - int fd = open (file_name, O_RDONLY | O_BINARY, 0); - if (unlikely (fd == -1)) goto fail_without_close; - - struct stat st; - if (unlikely (fstat (fd, &st) == -1)) goto fail; - - file->length = (unsigned long) st.st_size; - -#ifdef _PATH_RSRCFORKSPEC - if (unlikely (file->length == 0)) - { - int rfd = _open_resource_fork (file_name, file); - if (rfd != -1) - { - close (fd); - fd = rfd; - } - } -#endif - - file->contents = (char *) mmap (nullptr, file->length, PROT_READ, - MAP_PRIVATE | MAP_NORESERVE, fd, 0); - - if (unlikely (file->contents == MAP_FAILED)) goto fail; - - close (fd); - - return hb_blob_create (file->contents, file->length, - HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE, (void *) file, - (hb_destroy_func_t) _hb_mapped_file_destroy); - -fail: - close (fd); -fail_without_close: - free (file); - -#elif defined(_WIN32) && !defined(HB_NO_MMAP) - hb_mapped_file_t *file = (hb_mapped_file_t *) calloc (1, sizeof (hb_mapped_file_t)); - if (unlikely (!file)) return hb_blob_get_empty (); - - HANDLE fd; - unsigned int size = strlen (file_name) + 1; - wchar_t * wchar_file_name = (wchar_t *) malloc (sizeof (wchar_t) * size); - if (unlikely (!wchar_file_name)) goto fail_without_close; - mbstowcs (wchar_file_name, file_name, size); -#if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) - { - CREATEFILE2_EXTENDED_PARAMETERS ceparams = { 0 }; - ceparams.dwSize = sizeof(CREATEFILE2_EXTENDED_PARAMETERS); - ceparams.dwFileAttributes = FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED & 0xFFFF; - ceparams.dwFileFlags = FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED & 0xFFF00000; - ceparams.dwSecurityQosFlags = FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED & 0x000F0000; - ceparams.lpSecurityAttributes = nullptr; - ceparams.hTemplateFile = nullptr; - fd = CreateFile2 (wchar_file_name, GENERIC_READ, FILE_SHARE_READ, - OPEN_EXISTING, &ceparams); - } -#else - fd = CreateFileW (wchar_file_name, GENERIC_READ, FILE_SHARE_READ, nullptr, - OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL|FILE_FLAG_OVERLAPPED, - nullptr); -#endif - free (wchar_file_name); - - if (unlikely (fd == INVALID_HANDLE_VALUE)) goto fail_without_close; - -#if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) - { - LARGE_INTEGER length; - GetFileSizeEx (fd, &length); - file->length = length.LowPart; - file->mapping = CreateFileMappingFromApp (fd, nullptr, PAGE_READONLY, length.QuadPart, nullptr); - } -#else - file->length = (unsigned long) GetFileSize (fd, nullptr); - file->mapping = CreateFileMapping (fd, nullptr, PAGE_READONLY, 0, 0, nullptr); -#endif - if (unlikely (!file->mapping)) goto fail; - -#if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) - file->contents = (char *) MapViewOfFileFromApp (file->mapping, FILE_MAP_READ, 0, 0); -#else - file->contents = (char *) MapViewOfFile (file->mapping, FILE_MAP_READ, 0, 0, 0); -#endif - if (unlikely (!file->contents)) goto fail; - - CloseHandle (fd); - return hb_blob_create (file->contents, file->length, - HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE, (void *) file, - (hb_destroy_func_t) _hb_mapped_file_destroy); - -fail: - CloseHandle (fd); -fail_without_close: - free (file); - -#endif - - /* The following tries to read a file without knowing its size beforehand - It's used as a fallback for systems without mmap or to read from pipes */ - unsigned long len = 0, allocated = BUFSIZ * 16; - char *data = (char *) malloc (allocated); - if (unlikely (!data)) return hb_blob_get_empty (); - - FILE *fp = fopen (file_name, "rb"); - if (unlikely (!fp)) goto fread_fail_without_close; - - while (!feof (fp)) - { - if (allocated - len < BUFSIZ) - { - allocated *= 2; - /* Don't allocate and go more than ~536MB, our mmap reader still - can cover files like that but lets limit our fallback reader */ - if (unlikely (allocated > (2 << 28))) goto fread_fail; - char *new_data = (char *) realloc (data, allocated); - if (unlikely (!new_data)) goto fread_fail; - data = new_data; - } - - unsigned long addition = fread (data + len, 1, allocated - len, fp); - - int err = ferror (fp); -#ifdef EINTR // armcc doesn't have it - if (unlikely (err == EINTR)) continue; -#endif - if (unlikely (err)) goto fread_fail; - - len += addition; - } - fclose (fp); - - return hb_blob_create (data, len, HB_MEMORY_MODE_WRITABLE, data, - (hb_destroy_func_t) free); - -fread_fail: - fclose (fp); -fread_fail_without_close: - free (data); - return hb_blob_get_empty (); -} -#endif /* !HB_NO_OPEN */ |