| /* |
| * 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 */ |
| |
| |
| /** |
| * 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: (nullable): 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) |
| { |
| if (!length) |
| { |
| if (destroy) |
| destroy (user_data); |
| return hb_blob_get_empty (); |
| } |
| |
| hb_blob_t *blob = hb_blob_create_or_fail (data, length, mode, |
| user_data, destroy); |
| return likely (blob) ? blob : hb_blob_get_empty (); |
| } |
| |
| /** |
| * hb_blob_create_or_fail: (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: (nullable): 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. |
| * |
| * Note that this function returns a freshly-allocated empty blob even if @length |
| * is zero. This is in contrast to hb_blob_create(), which returns the singleton |
| * empty blob (as returned by hb_blob_get_empty()) if @length is zero. |
| * |
| * Return value: New blob, or `NULL` if failed. Destroy with hb_blob_destroy(). |
| * |
| * Since: 2.8.2 |
| **/ |
| hb_blob_t * |
| hb_blob_create_or_fail (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 >= 1u << 31 || |
| !(blob = hb_object_create<hb_blob_t> ())) |
| { |
| if (destroy) |
| destroy (user_data); |
| return nullptr; |
| } |
| |
| 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 nullptr; |
| } |
| } |
| |
| 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; |
| |
| hb_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: (nullable): 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: (nullable) (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 (hb_object_is_immutable (blob) || |
| !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 (unlikely (!length)) |
| mode = HB_MEMORY_MODE_WRITABLE; |
| |
| 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 *) hb_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 = hb_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 |
| |
| hb_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 *) hb_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)); |
| |
| int fd = open (rsrc_name, O_RDONLY | O_BINARY, 0); |
| hb_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, |
| * or hb_blob_get_empty() if failed. |
| * |
| * Since: 1.7.7 |
| **/ |
| hb_blob_t * |
| hb_blob_create_from_file (const char *file_name) |
| { |
| hb_blob_t *blob = hb_blob_create_from_file_or_fail (file_name); |
| return likely (blob) ? blob : hb_blob_get_empty (); |
| } |
| |
| /** |
| * hb_blob_create_from_file_or_fail: |
| * @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, |
| * or `NULL` if failed. |
| * |
| * Since: 2.8.2 |
| **/ |
| hb_blob_t * |
| hb_blob_create_from_file_or_fail (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 *) hb_calloc (1, sizeof (hb_mapped_file_t)); |
| if (unlikely (!file)) return nullptr; |
| |
| 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_or_fail (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: |
| hb_free (file); |
| |
| #elif defined(_WIN32) && !defined(HB_NO_MMAP) |
| hb_mapped_file_t *file = (hb_mapped_file_t *) hb_calloc (1, sizeof (hb_mapped_file_t)); |
| if (unlikely (!file)) return nullptr; |
| |
| HANDLE fd; |
| unsigned int size = strlen (file_name) + 1; |
| wchar_t * wchar_file_name = (wchar_t *) hb_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 |
| hb_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_or_fail (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: |
| hb_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 *) hb_malloc (allocated); |
| if (unlikely (!data)) return nullptr; |
| |
| 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 *) hb_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_or_fail (data, len, HB_MEMORY_MODE_WRITABLE, data, |
| (hb_destroy_func_t) hb_free); |
| |
| fread_fail: |
| fclose (fp); |
| fread_fail_without_close: |
| hb_free (data); |
| return nullptr; |
| } |
| #endif /* !HB_NO_OPEN */ |