--- old/src/java.desktop/share/native/libfontmanager/harfbuzz/hb-blob.cc 2020-07-21 14:25:10.318862173 -0700 +++ /dev/null 2020-01-23 11:31:37.155195123 -0800 @@ -1,678 +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 - */ - - -/* https://github.com/harfbuzz/harfbuzz/issues/1308 - * http://www.gnu.org/software/libc/manual/html_node/Feature-Test-Macros.html - * https://www.oracle.com/technetwork/articles/servers-storage-dev/standardheaderfiles-453865.html - */ -#ifndef _POSIX_C_SOURCE -#pragma GCC diagnostic push -#pragma GCC diagnostic ignored "-Wunused-macros" -#define _POSIX_C_SOURCE 200809L -#pragma GCC diagnostic pop -#endif - -#include "hb.hh" -#include "hb-blob.hh" - -#ifdef HAVE_SYS_MMAN_H -#ifdef HAVE_UNISTD_H -#include -#endif /* HAVE_UNISTD_H */ -#include -#endif /* HAVE_SYS_MMAN_H */ - -#include -#include -#include - - -/** - * 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: 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 ())) { - 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, - 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: 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 (&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: a blob. - * @key: key for data to set. - * @data: data to set. - * @destroy: callback to call when @data is not needed anymore. - * @replace: whether to replace an existing data with the same key. - * - * Return value: - * - * 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: key for data to get. - * - * - * - * Return value: (transfer none): - * - * 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. - * - * - * - * 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. - * - * - * - * Return value: TODO - * - * 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. - * - * - * - * 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): - * - * - * - * Returns: (transfer none) (array length=length): - * - * 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 (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 - */ - -#ifdef HAVE_MMAP -# include -# include -# include -#endif - -#ifdef _WIN32 -# include -#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 - -/** - * hb_blob_create_from_file: - * @file_name: font filename. - * - * Returns: A 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; - 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 == nullptr)) goto fail_without_close; - mbstowcs (wchar_file_name, file_name, size); -#if defined(WINAPI_FAMILY) && (WINAPI_FAMILY==WINAPI_FAMILY_PC_APP || WINAPI_FAMILY==WINAPI_FAMILY_PHONE_APP) - { - 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 defined(WINAPI_FAMILY) && (WINAPI_FAMILY==WINAPI_FAMILY_PC_APP || WINAPI_FAMILY==WINAPI_FAMILY_PHONE_APP) - { - 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 == nullptr)) goto fail; - -#if defined(WINAPI_FAMILY) && (WINAPI_FAMILY==WINAPI_FAMILY_PC_APP || WINAPI_FAMILY==WINAPI_FAMILY_PHONE_APP) - 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 == nullptr)) 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 == nullptr)) return hb_blob_get_empty (); - - FILE *fp = fopen (file_name, "rb"); - if (unlikely (fp == nullptr)) 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 == nullptr)) 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; - } - - 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 (); -} --- /dev/null 2020-01-23 11:31:37.155195123 -0800 +++ new/src/java.desktop/share/native/libharfbuzz/hb-blob.cc 2020-07-21 14:25:10.010862178 -0700 @@ -0,0 +1,678 @@ +/* + * 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 + */ + + +/* https://github.com/harfbuzz/harfbuzz/issues/1308 + * http://www.gnu.org/software/libc/manual/html_node/Feature-Test-Macros.html + * https://www.oracle.com/technetwork/articles/servers-storage-dev/standardheaderfiles-453865.html + */ +#ifndef _POSIX_C_SOURCE +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wunused-macros" +#define _POSIX_C_SOURCE 200809L +#pragma GCC diagnostic pop +#endif + +#include "hb.hh" +#include "hb-blob.hh" + +#ifdef HAVE_SYS_MMAN_H +#ifdef HAVE_UNISTD_H +#include +#endif /* HAVE_UNISTD_H */ +#include +#endif /* HAVE_SYS_MMAN_H */ + +#include +#include +#include + + +/** + * 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: 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 ())) { + 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, + 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: 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 (&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: a blob. + * @key: key for data to set. + * @data: data to set. + * @destroy: callback to call when @data is not needed anymore. + * @replace: whether to replace an existing data with the same key. + * + * Return value: + * + * 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: key for data to get. + * + * + * + * Return value: (transfer none): + * + * 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. + * + * + * + * 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. + * + * + * + * Return value: TODO + * + * 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. + * + * + * + * 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): + * + * + * + * Returns: (transfer none) (array length=length): + * + * 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 (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 + */ + +#ifdef HAVE_MMAP +# include +# include +# include +#endif + +#ifdef _WIN32 +# include +#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 + +/** + * hb_blob_create_from_file: + * @file_name: font filename. + * + * Returns: A 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; + 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 == nullptr)) goto fail_without_close; + mbstowcs (wchar_file_name, file_name, size); +#if defined(WINAPI_FAMILY) && (WINAPI_FAMILY==WINAPI_FAMILY_PC_APP || WINAPI_FAMILY==WINAPI_FAMILY_PHONE_APP) + { + 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 defined(WINAPI_FAMILY) && (WINAPI_FAMILY==WINAPI_FAMILY_PC_APP || WINAPI_FAMILY==WINAPI_FAMILY_PHONE_APP) + { + 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 == nullptr)) goto fail; + +#if defined(WINAPI_FAMILY) && (WINAPI_FAMILY==WINAPI_FAMILY_PC_APP || WINAPI_FAMILY==WINAPI_FAMILY_PHONE_APP) + 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 == nullptr)) 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 == nullptr)) return hb_blob_get_empty (); + + FILE *fp = fopen (file_name, "rb"); + if (unlikely (fp == nullptr)) 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 == nullptr)) 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; + } + + 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 (); +}