hb-open-type-private.hh revision 977eeb714454630bd045bb11f58ff6397f10b143
164aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod/* 2ee58aaebd296ea8237516754fd4e825d524b11b7Behdad Esfahbod * Copyright (C) 2007,2008,2009 Red Hat, Inc. 364aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * 464aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * This is part of HarfBuzz, an OpenType Layout engine library. 564aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * 664aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * Permission is hereby granted, without written agreement and without 764aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * license or royalty fees, to use, copy, modify, and distribute this 864aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * software and its documentation for any purpose, provided that the 964aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * above copyright notice and the following two paragraphs appear in 1064aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * all copies of this software. 1164aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * 1264aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 1364aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 1464aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 1564aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 1664aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * DAMAGE. 1764aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * 1864aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 1964aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 2064aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 2164aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 2264aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 2364aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * 2464aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * Red Hat Author(s): Behdad Esfahbod 2564aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod */ 2664aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod 275f5b24f99f52bbc922e238b65c06061ba07c8548Behdad Esfahbod#ifndef HB_OPEN_TYPES_PRIVATE_HH 285f5b24f99f52bbc922e238b65c06061ba07c8548Behdad Esfahbod#define HB_OPEN_TYPES_PRIVATE_HH 2912c4568c680ea2b9b98a16a8b7402ca185c90ef6Behdad Esfahbod 302098a021a826e76ee27d5db74e32738d7d1c3d30Behdad Esfahbod#include "hb-private.h" 3112c4568c680ea2b9b98a16a8b7402ca185c90ef6Behdad Esfahbod 3270de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod#include "hb-blob.h" 3370de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod 34a16ecbf0564a6e2576da22c12827f3c0719da549Behdad Esfahbod 35706ab25a4cb043d46e6088aa0a7184ee200276c9Behdad Esfahbod#define NO_INDEX ((unsigned int) 0xFFFF) 365a0b791184cf6ef39eae0570e14aca21abc32845Behdad Esfahbod 37706ab25a4cb043d46e6088aa0a7184ee200276c9Behdad Esfahbod 38196598bbccff08415ff5192314cba044df258cadBehdad Esfahbod/* 39196598bbccff08415ff5192314cba044df258cadBehdad Esfahbod * Casts 40196598bbccff08415ff5192314cba044df258cadBehdad Esfahbod */ 41196598bbccff08415ff5192314cba044df258cadBehdad Esfahbod 422b5a59c277f4c5bf7aac9a9005054763e322e02dBehdad Esfahbod#define CONST_CHARP(X) (reinterpret_cast<const char *>(X)) 432b5a59c277f4c5bf7aac9a9005054763e322e02dBehdad Esfahbod#define DECONST_CHARP(X) ((char *)reinterpret_cast<const char *>(X)) 442b5a59c277f4c5bf7aac9a9005054763e322e02dBehdad Esfahbod#define CHARP(X) (reinterpret_cast<char *>(X)) 452b5a59c277f4c5bf7aac9a9005054763e322e02dBehdad Esfahbod 462b5a59c277f4c5bf7aac9a9005054763e322e02dBehdad Esfahbod#define CONST_CAST(T,X,Ofs) (*(reinterpret_cast<const T *>(CONST_CHARP(&(X)) + Ofs))) 472b5a59c277f4c5bf7aac9a9005054763e322e02dBehdad Esfahbod#define DECONST_CAST(T,X,Ofs) (*(reinterpret_cast<T *>((char *)CONST_CHARP(&(X)) + Ofs))) 482b5a59c277f4c5bf7aac9a9005054763e322e02dBehdad Esfahbod#define CAST(T,X,Ofs) (*(reinterpret_cast<T *>(CHARP(&(X)) + Ofs))) 49196598bbccff08415ff5192314cba044df258cadBehdad Esfahbod 50284899ccbe79fda7405ab09d3092fc25fd89e810Behdad Esfahbod#define CONST_NEXT(T,X) (*(reinterpret_cast<const T *>(CONST_CHARP(&(X)) + (X).get_size ()))) 51284899ccbe79fda7405ab09d3092fc25fd89e810Behdad Esfahbod#define NEXT(T,X) (*(reinterpret_cast<T *>(CHARP(&(X)) + (X).get_size ()))) 5270de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod 5370de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod/* 54600e5eb80f553ea8eb862e6784133574c74ca513Behdad Esfahbod * Class features 55600e5eb80f553ea8eb862e6784133574c74ca513Behdad Esfahbod */ 56600e5eb80f553ea8eb862e6784133574c74ca513Behdad Esfahbod 578b8358033184198ff638ee1379093717596e162dBehdad Esfahbod 588b8358033184198ff638ee1379093717596e162dBehdad Esfahbod/* Null objects */ 598b8358033184198ff638ee1379093717596e162dBehdad Esfahbod 608b8358033184198ff638ee1379093717596e162dBehdad Esfahbod/* Global nul-content Null pool. Enlarge as necessary. */ 618b8358033184198ff638ee1379093717596e162dBehdad Esfahbodstatic const char NullPool[16] = ""; 628b8358033184198ff638ee1379093717596e162dBehdad Esfahbod 638b8358033184198ff638ee1379093717596e162dBehdad Esfahbod/* Generic template for nul-content sizeof-sized Null objects. */ 648b8358033184198ff638ee1379093717596e162dBehdad Esfahbodtemplate <typename Type> 6560d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbodstruct Null 6660d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod{ 67f8dc67b3c24dfc805da756a73cb217b36e16b4b8Behdad Esfahbod ASSERT_STATIC (sizeof (Type) <= sizeof (NullPool)); 684497af0069a94c69fc1518b1db2c1282721b732aBehdad Esfahbod static inline const Type &get () { return *(const Type*)NullPool; } 698b8358033184198ff638ee1379093717596e162dBehdad Esfahbod}; 708b8358033184198ff638ee1379093717596e162dBehdad Esfahbod 718b8358033184198ff638ee1379093717596e162dBehdad Esfahbod/* Specializaiton for arbitrary-content arbitrary-sized Null objects. */ 728b8358033184198ff638ee1379093717596e162dBehdad Esfahbod#define DEFINE_NULL_DATA(Type, size, data) \ 73cc6c644ff2af5f6669b6ec100ff13e904872b21cBehdad Esfahbodstatic const char _Null##Type[size] = data; \ 748b8358033184198ff638ee1379093717596e162dBehdad Esfahbodtemplate <> \ 7560d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbodstruct Null <Type> \ 7660d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod{ \ 774497af0069a94c69fc1518b1db2c1282721b732aBehdad Esfahbod static inline const Type &get () { return *(const Type*)_Null##Type; } \ 788b8358033184198ff638ee1379093717596e162dBehdad Esfahbod} 798b8358033184198ff638ee1379093717596e162dBehdad Esfahbod 808b8358033184198ff638ee1379093717596e162dBehdad Esfahbod/* Accessor macro. */ 818b8358033184198ff638ee1379093717596e162dBehdad Esfahbod#define Null(Type) (Null<Type>::get()) 828b8358033184198ff638ee1379093717596e162dBehdad Esfahbod 838b8358033184198ff638ee1379093717596e162dBehdad Esfahbod 848b8358033184198ff638ee1379093717596e162dBehdad Esfahbod#define ASSERT_SIZE_DATA(Type, size, data) \ 851f437e6f47fb6c15761021bd2078f31778f2179cBehdad Esfahbod ASSERT_SIZE (Type, size); \ 861f437e6f47fb6c15761021bd2078f31778f2179cBehdad Esfahbod DEFINE_NULL_DATA (Type, size, data) 871f437e6f47fb6c15761021bd2078f31778f2179cBehdad Esfahbod 88600e5eb80f553ea8eb862e6784133574c74ca513Behdad Esfahbod/* get_for_data() is a static class method returning a reference to an 89600e5eb80f553ea8eb862e6784133574c74ca513Behdad Esfahbod * instance of Type located at the input data location. It's just a 9054e5aac5e2947d4e2864c6f2987e4d275da73100Behdad Esfahbod * fancy, NULL-safe, cast! */ 91fd92a3dde32fd10df30c9eeb97641bc3c15b1e9bBehdad Esfahbod#define STATIC_DEFINE_GET_FOR_DATA(Type) \ 9260d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod static inline const Type& get_for_data (const char *data) \ 9360d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod { \ 948b8358033184198ff638ee1379093717596e162dBehdad Esfahbod if (HB_UNLIKELY (data == NULL)) return Null(Type); \ 954497af0069a94c69fc1518b1db2c1282721b732aBehdad Esfahbod return *(const Type*)data; \ 96212aba6189d7aaac0bab169b77ae6bdab16800a5Behdad Esfahbod } 97212aba6189d7aaac0bab169b77ae6bdab16800a5Behdad Esfahbod/* Like get_for_data(), but checks major version first. */ 98cd3827ee567612c5500206b62840702fc956e0f5Behdad Esfahbod#define STATIC_DEFINE_GET_FOR_DATA_CHECK_MAJOR_VERSION(Type, MajorMin, MajorMax) \ 99212aba6189d7aaac0bab169b77ae6bdab16800a5Behdad Esfahbod static inline const Type& get_for_data (const char *data) \ 100212aba6189d7aaac0bab169b77ae6bdab16800a5Behdad Esfahbod { \ 101212aba6189d7aaac0bab169b77ae6bdab16800a5Behdad Esfahbod if (HB_UNLIKELY (data == NULL)) return Null(Type); \ 1024497af0069a94c69fc1518b1db2c1282721b732aBehdad Esfahbod const Type& t = *(const Type*)data; \ 103cd3827ee567612c5500206b62840702fc956e0f5Behdad Esfahbod if (HB_UNLIKELY (t.version.major < MajorMin || t.version.major > MajorMax)) return Null(Type); \ 104212aba6189d7aaac0bab169b77ae6bdab16800a5Behdad Esfahbod return t; \ 105212aba6189d7aaac0bab169b77ae6bdab16800a5Behdad Esfahbod } 106600e5eb80f553ea8eb862e6784133574c74ca513Behdad Esfahbod 107600e5eb80f553ea8eb862e6784133574c74ca513Behdad Esfahbod 108577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod/* 109577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod * Sanitize 110577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod */ 111577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod 1129b76a290a94f2603f3cb9498ae976125347cf54bBehdad Esfahbod#if HB_DEBUG 113b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod#define SANITIZE_DEBUG_ARG_DEF , unsigned int sanitize_depth 114b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod#define SANITIZE_DEBUG_ARG , sanitize_depth + 1 1159b76a290a94f2603f3cb9498ae976125347cf54bBehdad Esfahbod#define SANITIZE_DEBUG_ARG_INIT , 1 116b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod#define SANITIZE_DEBUG() \ 117b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod HB_STMT_START { \ 1189b76a290a94f2603f3cb9498ae976125347cf54bBehdad Esfahbod if (sanitize_depth < HB_DEBUG) \ 1197acb389569cf99c6bae9db31a8ed7c7007fbb566Behdad Esfahbod fprintf (stderr, "SANITIZE(%p) %-*d-> %s\n", \ 1207acb389569cf99c6bae9db31a8ed7c7007fbb566Behdad Esfahbod (CONST_CHARP (this) == NullPool) ? 0 : this, \ 1219b76a290a94f2603f3cb9498ae976125347cf54bBehdad Esfahbod sanitize_depth, sanitize_depth, \ 1227acb389569cf99c6bae9db31a8ed7c7007fbb566Behdad Esfahbod __PRETTY_FUNCTION__); \ 123b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod } HB_STMT_END 124b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod#else 125b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod#define SANITIZE_DEBUG_ARG_DEF 126b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod#define SANITIZE_DEBUG_ARG 127b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod#define SANITIZE_DEBUG_ARG_INIT 128b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod#define SANITIZE_DEBUG() HB_STMT_START {} HB_STMT_END 129b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod#endif 130b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod 13141895506cb6a41b1a833866f8822261ea449ea0bBehdad Esfahbod#define SANITIZE_ARG_DEF \ 13241895506cb6a41b1a833866f8822261ea449ea0bBehdad Esfahbod hb_sanitize_context_t *context SANITIZE_DEBUG_ARG_DEF 13341895506cb6a41b1a833866f8822261ea449ea0bBehdad Esfahbod#define SANITIZE_ARG \ 13441895506cb6a41b1a833866f8822261ea449ea0bBehdad Esfahbod context SANITIZE_DEBUG_ARG 13541895506cb6a41b1a833866f8822261ea449ea0bBehdad Esfahbod#define SANITIZE_ARG_INIT \ 13641895506cb6a41b1a833866f8822261ea449ea0bBehdad Esfahbod &context SANITIZE_DEBUG_ARG_INIT 13741895506cb6a41b1a833866f8822261ea449ea0bBehdad Esfahbod 138577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbodtypedef struct _hb_sanitize_context_t hb_sanitize_context_t; 139577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbodstruct _hb_sanitize_context_t 140577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod{ 141577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod const char *start, *end; 142577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod int edit_count; 143577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod hb_blob_t *blob; 144577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod}; 145577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod 146577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbodstatic HB_GNUC_UNUSED void 1474e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod_hb_sanitize_init (hb_sanitize_context_t *context, 1484e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod hb_blob_t *blob) 149577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod{ 150577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod context->blob = blob; 151577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod context->start = hb_blob_lock (blob); 152577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod context->end = context->start + hb_blob_get_length (blob); 153577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod context->edit_count = 0; 1544f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbod 1554f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbod#if HB_DEBUG 1567acb389569cf99c6bae9db31a8ed7c7007fbb566Behdad Esfahbod fprintf (stderr, "sanitize %p init [%p..%p] (%u bytes)\n", 1577f96b39a9d5a81ba77e0c3dea8fe2cdb9957c4c7Behdad Esfahbod context->blob, context->start, context->end, context->end - context->start); 1584f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbod#endif 159577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod} 160577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod 161577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbodstatic HB_GNUC_UNUSED void 1624e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod_hb_sanitize_fini (hb_sanitize_context_t *context, 1634e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod bool unlock) 164577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod{ 1654f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbod#if HB_DEBUG 1667acb389569cf99c6bae9db31a8ed7c7007fbb566Behdad Esfahbod fprintf (stderr, "sanitize %p fini [%p..%p] %u edit requests\n", 1677acb389569cf99c6bae9db31a8ed7c7007fbb566Behdad Esfahbod context->blob, context->start, context->end, context->edit_count); 1684f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbod#endif 1694f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbod 170577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod if (unlock) 171577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod hb_blob_unlock (context->blob); 172577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod} 173577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod 1744f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbodstatic HB_GNUC_UNUSED inline bool 17541895506cb6a41b1a833866f8822261ea449ea0bBehdad Esfahbod_hb_sanitize_check (SANITIZE_ARG_DEF, 17641895506cb6a41b1a833866f8822261ea449ea0bBehdad Esfahbod const char *base, 17741895506cb6a41b1a833866f8822261ea449ea0bBehdad Esfahbod unsigned int len) 17841895506cb6a41b1a833866f8822261ea449ea0bBehdad Esfahbod{ 179ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod bool ret = context->start <= base && 180ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod base <= context->end && 181ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod (unsigned int) (context->end - base) >= len; 182ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod 183ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod#if HB_DEBUG 184ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod if (sanitize_depth < HB_DEBUG) \ 185ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod fprintf (stderr, "SANITIZE(%p) %-*d-> check [%p..%p] (%d bytes) in [%p..%p] -> %s\n", \ 186ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod base, 187ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod sanitize_depth, sanitize_depth, 188ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod base, base+len, len, 189ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod context->start, context->end, 190ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod ret ? "pass" : "FAIL"); 191ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod#endif 192ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod return ret; 19341895506cb6a41b1a833866f8822261ea449ea0bBehdad Esfahbod} 19441895506cb6a41b1a833866f8822261ea449ea0bBehdad Esfahbod 19541895506cb6a41b1a833866f8822261ea449ea0bBehdad Esfahbodstatic HB_GNUC_UNUSED inline bool 196815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbod_hb_sanitize_array (SANITIZE_ARG_DEF, 197815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbod const char *base, 198815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbod unsigned int record_size, 199815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbod unsigned int len) 200815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbod{ 201815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbod bool overflows = len >= ((unsigned int) -1) / record_size; 202815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbod 203815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbod#if HB_DEBUG 204815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbod if (sanitize_depth < HB_DEBUG) \ 205815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbod fprintf (stderr, "SANITIZE(%p) %-*d-> array [%p..%p] (%d*%d=%ld bytes) in [%p..%p] -> %s\n", \ 206815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbod base, 207815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbod sanitize_depth, sanitize_depth, 208815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbod base, base + (record_size * len), record_size, len, (unsigned long) record_size * len, 209815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbod context->start, context->end, 210815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbod !overflows ? "does not overflow" : "OVERFLOWS FAIL"); 211815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbod#endif 212815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbod return HB_LIKELY (!overflows) && _hb_sanitize_check (SANITIZE_ARG, base, record_size * len); 213815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbod} 214815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbod 215815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbodstatic HB_GNUC_UNUSED inline bool 21641895506cb6a41b1a833866f8822261ea449ea0bBehdad Esfahbod_hb_sanitize_edit (SANITIZE_ARG_DEF, 2174f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbod const char *base HB_GNUC_UNUSED, 2184f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbod unsigned int len HB_GNUC_UNUSED) 219577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod{ 220977eeb714454630bd045bb11f58ff6397f10b143Behdad Esfahbod bool perm = hb_blob_try_writable_inplace (context->blob); 221f4b58d3fc2956a9d1b6178588d809c781f7a5c0cBehdad Esfahbod context->edit_count++; 2224f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbod 2234f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbod#if HB_DEBUG 224ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod fprintf (stderr, "SANITIZE(%p) %-*d-> edit(%u) [%p..%p] (%d bytes) in [%p..%p] -> %s\n", \ 225ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod base, 226ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod sanitize_depth, sanitize_depth, 227ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod context->edit_count, 228ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod base, base+len, len, 229ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod context->start, context->end, 230ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod perm ? "granted" : "REJECTED"); 2314f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbod#endif 2324f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbod return perm; 233577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod} 234577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod 235577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod#define SANITIZE(X) HB_LIKELY ((X).sanitize (SANITIZE_ARG)) 236577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod#define SANITIZE2(X,Y) (SANITIZE (X) && SANITIZE (Y)) 237577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod 238577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod#define SANITIZE_THIS(X) HB_LIKELY ((X).sanitize (SANITIZE_ARG, CONST_CHARP(this))) 239577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod#define SANITIZE_THIS2(X,Y) (SANITIZE_THIS (X) && SANITIZE_THIS (Y)) 240577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod#define SANITIZE_THIS3(X,Y,Z) (SANITIZE_THIS (X) && SANITIZE_THIS (Y) && SANITIZE_THIS(Z)) 241577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod 242577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod#define SANITIZE_BASE(X,B) HB_LIKELY ((X).sanitize (SANITIZE_ARG, B)) 243577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod#define SANITIZE_BASE2(X,Y,B) (SANITIZE_BASE (X,B) && SANITIZE_BASE (Y,B)) 244577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod 245577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod#define SANITIZE_SELF() SANITIZE_OBJ (*this) 246577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod#define SANITIZE_OBJ(X) SANITIZE_MEM(&(X), sizeof (X)) 247577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod#define SANITIZE_GET_SIZE() SANITIZE_SELF() && SANITIZE_MEM (this, this->get_size ()) 248577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod 249d0b657379bbe63602953412d6bc944b2a0f430ebBehdad Esfahbod/* TODO Optimize this if L is fixed (gcc magic) */ 25041895506cb6a41b1a833866f8822261ea449ea0bBehdad Esfahbod#define SANITIZE_MEM(B,L) HB_LIKELY (_hb_sanitize_check (SANITIZE_ARG, CONST_CHARP(B), (L))) 251577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod 252815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbod#define SANITIZE_ARRAY(A,S,L) HB_LIKELY (_hb_sanitize_array (SANITIZE_ARG, CONST_CHARP(A), S, L)) 253815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbod 254d0b657379bbe63602953412d6bc944b2a0f430ebBehdad Esfahbod#define NEUTER(Var, Val) \ 255d0b657379bbe63602953412d6bc944b2a0f430ebBehdad Esfahbod (SANITIZE_OBJ (Var) && \ 25641895506cb6a41b1a833866f8822261ea449ea0bBehdad Esfahbod _hb_sanitize_edit (SANITIZE_ARG, CONST_CHARP(&(Var)), sizeof (Var)) && \ 257d0b657379bbe63602953412d6bc944b2a0f430ebBehdad Esfahbod ((Var) = (Val), true)) 258577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod 259577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod 2604e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod/* Template to sanitize an object. */ 2614e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbodtemplate <typename Type> 2624e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbodstruct Sanitizer 2634e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod{ 2644e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod static hb_blob_t *sanitize (hb_blob_t *blob) { 2654e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod hb_sanitize_context_t context; 2664e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod bool sane; 2674e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod 268d0b657379bbe63602953412d6bc944b2a0f430ebBehdad Esfahbod /* TODO is_sane() stuff */ 2694e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod 2704e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod retry: 2714f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbod#if HB_DEBUG 2727acb389569cf99c6bae9db31a8ed7c7007fbb566Behdad Esfahbod fprintf (stderr, "Sanitizer %p start %s\n", blob, __PRETTY_FUNCTION__); 2734f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbod#endif 2744f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbod 2754e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod _hb_sanitize_init (&context, blob); 2764e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod 2778cd6fa28d1b77100491519b8dedb2e113508bf59Behdad Esfahbod Type *t = &CAST (Type, *DECONST_CHARP(context.start), 0); 2784e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod 279b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod sane = t->sanitize (SANITIZE_ARG_INIT); 2804e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod if (sane) { 2814e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod if (context.edit_count) { 2820d77ab8a73f57c9fca4c6f9301dae394d79526e3Behdad Esfahbod#if HB_DEBUG 2830d77ab8a73f57c9fca4c6f9301dae394d79526e3Behdad Esfahbod fprintf (stderr, "Sanitizer %p passed first round with %d edits; going a second round %s\n", 2840d77ab8a73f57c9fca4c6f9301dae394d79526e3Behdad Esfahbod blob, context.edit_count, __PRETTY_FUNCTION__); 2850d77ab8a73f57c9fca4c6f9301dae394d79526e3Behdad Esfahbod#endif 2864e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod /* sanitize again to ensure not toe-stepping */ 2874e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod context.edit_count = 0; 288b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod sane = t->sanitize (SANITIZE_ARG_INIT); 2894e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod if (context.edit_count) { 2900d77ab8a73f57c9fca4c6f9301dae394d79526e3Behdad Esfahbod#if HB_DEBUG 291ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod fprintf (stderr, "Sanitizer %p requested %d edits in second round; FAILLING %s\n", 2920d77ab8a73f57c9fca4c6f9301dae394d79526e3Behdad Esfahbod blob, context.edit_count, __PRETTY_FUNCTION__); 2930d77ab8a73f57c9fca4c6f9301dae394d79526e3Behdad Esfahbod#endif 2944e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod sane = false; 2954e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod } 2964e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod } 2974e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod _hb_sanitize_fini (&context, true); 2984e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod } else { 2994f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbod unsigned int edit_count = context.edit_count; 3004e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod _hb_sanitize_fini (&context, true); 301977eeb714454630bd045bb11f58ff6397f10b143Behdad Esfahbod if (edit_count && !hb_blob_is_writable (blob) && hb_blob_try_writable (blob)) { 302977eeb714454630bd045bb11f58ff6397f10b143Behdad Esfahbod /* ok, we made it writable by relocating. try again */ 3034f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbod#if HB_DEBUG 3047acb389569cf99c6bae9db31a8ed7c7007fbb566Behdad Esfahbod fprintf (stderr, "Sanitizer %p retry %s\n", blob, __PRETTY_FUNCTION__); 3054f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbod#endif 3064e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod goto retry; 3074e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod } 3084e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod } 3094e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod 3104f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbod#if HB_DEBUG 311ae728e51e94d18d731b7c8dc524da1a4f427d63bBehdad Esfahbod fprintf (stderr, "Sanitizer %p %s %s\n", blob, sane ? "passed" : "FAILED", __PRETTY_FUNCTION__); 3124f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbod#endif 3134e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod if (sane) 3144e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod return blob; 3154e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod else { 3164e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod hb_blob_destroy (blob); 3174e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod return hb_blob_create_empty (); 3184e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod } 3194e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod } 3204e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod 321d60bb8ca2ae6edf29b2227b56c57f0d16879370bBehdad Esfahbod static const Type& lock_instance (hb_blob_t *blob) { 3224e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod return Type::get_for_data (hb_blob_lock (blob)); 3234e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod } 3244e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod}; 3254e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod 3262d15e72c75931398db5e027e660f1320bb979117Behdad Esfahbod 327b6e62bc5db76ae342177b2b646c37f45eccad975Behdad Esfahbod/* 328b6e62bc5db76ae342177b2b646c37f45eccad975Behdad Esfahbod * 329bff3c0fde5da04a70d1f7aeeb9fa2a75fe5c07f6Behdad Esfahbod * The OpenType Font File: Data Types 330b6e62bc5db76ae342177b2b646c37f45eccad975Behdad Esfahbod */ 331b6e62bc5db76ae342177b2b646c37f45eccad975Behdad Esfahbod 332b6e62bc5db76ae342177b2b646c37f45eccad975Behdad Esfahbod 333b6e62bc5db76ae342177b2b646c37f45eccad975Behdad Esfahbod/* "The following data types are used in the OpenType font file. 334b6e62bc5db76ae342177b2b646c37f45eccad975Behdad Esfahbod * All OpenType fonts use Motorola-style byte ordering (Big Endian):" */ 335b6e62bc5db76ae342177b2b646c37f45eccad975Behdad Esfahbod 3365f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod/* 3375f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod * Int types 3385f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod */ 3395f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod 3409e826ea2832f0444bcef9075b445d481a58a09c2Behdad Esfahbod/* TODO On machines that allow unaligned access, use this version. */ 3419e826ea2832f0444bcef9075b445d481a58a09c2Behdad Esfahbod#define _DEFINE_INT_TYPE1_UNALIGNED(NAME, TYPE, BIG_ENDIAN, BYTES) \ 34260d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod struct NAME \ 34360d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod { \ 34420cc86b3592db33731de671f008d7d222776be49Behdad Esfahbod inline NAME& operator = (TYPE i) { (TYPE&) v = BIG_ENDIAN (i); return *this; } \ 34520cc86b3592db33731de671f008d7d222776be49Behdad Esfahbod inline operator TYPE(void) const { return BIG_ENDIAN ((TYPE&) v); } \ 34620cc86b3592db33731de671f008d7d222776be49Behdad Esfahbod inline bool operator== (NAME o) const { return (TYPE&) v == (TYPE&) o.v; } \ 347b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod inline bool sanitize (SANITIZE_ARG_DEF) { \ 348b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod SANITIZE_DEBUG (); \ 349b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod return SANITIZE_SELF (); \ 350b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod } \ 3519e826ea2832f0444bcef9075b445d481a58a09c2Behdad Esfahbod private: unsigned char v[BYTES]; \ 3529e826ea2832f0444bcef9075b445d481a58a09c2Behdad Esfahbod }; \ 3539e826ea2832f0444bcef9075b445d481a58a09c2Behdad Esfahbod ASSERT_SIZE (NAME, BYTES) 3549e826ea2832f0444bcef9075b445d481a58a09c2Behdad Esfahbod 3559e826ea2832f0444bcef9075b445d481a58a09c2Behdad Esfahbod#define DEFINE_INT_TYPE1(NAME, TYPE, BIG_ENDIAN, BYTES) \ 3569e826ea2832f0444bcef9075b445d481a58a09c2Behdad Esfahbod struct NAME \ 3579e826ea2832f0444bcef9075b445d481a58a09c2Behdad Esfahbod { \ 3589e826ea2832f0444bcef9075b445d481a58a09c2Behdad Esfahbod inline NAME& operator = (TYPE i) { BIG_ENDIAN##_put_unaligned(v, i); return *this; } \ 3599e826ea2832f0444bcef9075b445d481a58a09c2Behdad Esfahbod inline operator TYPE(void) const { return BIG_ENDIAN##_get_unaligned (v); } \ 3609e826ea2832f0444bcef9075b445d481a58a09c2Behdad Esfahbod inline bool operator== (NAME o) const { return BIG_ENDIAN##_cmp_unaligned (v, o.v); } \ 3619e826ea2832f0444bcef9075b445d481a58a09c2Behdad Esfahbod inline bool sanitize (SANITIZE_ARG_DEF) { \ 3629e826ea2832f0444bcef9075b445d481a58a09c2Behdad Esfahbod SANITIZE_DEBUG (); \ 3639e826ea2832f0444bcef9075b445d481a58a09c2Behdad Esfahbod return SANITIZE_SELF (); \ 3649e826ea2832f0444bcef9075b445d481a58a09c2Behdad Esfahbod } \ 3659e826ea2832f0444bcef9075b445d481a58a09c2Behdad Esfahbod private: unsigned char v[BYTES]; \ 3665f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod }; \ 36720cc86b3592db33731de671f008d7d222776be49Behdad Esfahbod ASSERT_SIZE (NAME, BYTES) 368df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#define DEFINE_INT_TYPE0(NAME, type, b) DEFINE_INT_TYPE1 (NAME, type##_t, hb_be_##type, b) 369df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#define DEFINE_INT_TYPE(NAME, u, w) DEFINE_INT_TYPE0 (NAME, u##int##w, (w / 8)) 3705f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod 371b6e62bc5db76ae342177b2b646c37f45eccad975Behdad Esfahbod 37220cc86b3592db33731de671f008d7d222776be49Behdad EsfahbodDEFINE_INT_TYPE (USHORT, u, 16); /* 16-bit unsigned integer. */ 37320cc86b3592db33731de671f008d7d222776be49Behdad EsfahbodDEFINE_INT_TYPE (SHORT, , 16); /* 16-bit signed integer. */ 37420cc86b3592db33731de671f008d7d222776be49Behdad EsfahbodDEFINE_INT_TYPE (ULONG, u, 32); /* 32-bit unsigned integer. */ 37520cc86b3592db33731de671f008d7d222776be49Behdad EsfahbodDEFINE_INT_TYPE (LONG, , 32); /* 32-bit signed integer. */ 3766b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod 377bff3c0fde5da04a70d1f7aeeb9fa2a75fe5c07f6Behdad Esfahbod 3786b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod/* Array of four uint8s (length = 32 bits) used to identify a script, language 3796b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod * system, feature, or baseline */ 38020cc86b3592db33731de671f008d7d222776be49Behdad Esfahbodstruct Tag : ULONG 38160d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod{ 3824497af0069a94c69fc1518b1db2c1282721b732aBehdad Esfahbod inline Tag (const Tag &o) { *(ULONG*)this = (ULONG&) o; } 3834497af0069a94c69fc1518b1db2c1282721b732aBehdad Esfahbod inline Tag (uint32_t i) { *(ULONG*)this = i; } 3844497af0069a94c69fc1518b1db2c1282721b732aBehdad Esfahbod inline Tag (const char *c) { *(ULONG*)this = *(ULONG*)c; } 3854497af0069a94c69fc1518b1db2c1282721b732aBehdad Esfahbod inline bool operator== (const char *c) const { return *(ULONG*)this == *(ULONG*)c; } 386befc022affd2386b3f46cd7d11e4262f6c8bce9fBehdad Esfahbod /* What the char* converters return is NOT nul-terminated. Print using "%.4s" */ 3872b5a59c277f4c5bf7aac9a9005054763e322e02dBehdad Esfahbod inline operator const char* (void) const { return CONST_CHARP(this); } 3882b5a59c277f4c5bf7aac9a9005054763e322e02dBehdad Esfahbod inline operator char* (void) { return CHARP(this); } 389738c54d9caa3affc4b434e56bfb810ff6dc9b0b3Behdad Esfahbod 390738c54d9caa3affc4b434e56bfb810ff6dc9b0b3Behdad Esfahbod inline bool sanitize (SANITIZE_ARG_DEF) { 391b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod SANITIZE_DEBUG (); 392738c54d9caa3affc4b434e56bfb810ff6dc9b0b3Behdad Esfahbod /* Note: Only accept ASCII-visible tags (mind DEL) 393738c54d9caa3affc4b434e56bfb810ff6dc9b0b3Behdad Esfahbod * This is one of the few times (only time?) we check 394738c54d9caa3affc4b434e56bfb810ff6dc9b0b3Behdad Esfahbod * for data integrity, as opposed o just boundary checks 395738c54d9caa3affc4b434e56bfb810ff6dc9b0b3Behdad Esfahbod */ 396738c54d9caa3affc4b434e56bfb810ff6dc9b0b3Behdad Esfahbod return SANITIZE_SELF () && (((uint32_t) *this) & 0x80808080) == 0; 397738c54d9caa3affc4b434e56bfb810ff6dc9b0b3Behdad Esfahbod } 3986b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod}; 399303fe62824d4e99df554b6bfaacba05d068522fbBehdad EsfahbodASSERT_SIZE (Tag, 4); 400da1097bc3b1995776c205707fd2b17603b804646Behdad Esfahbod#define _NULL_TAG_INIT {' ', ' ', ' ', ' '} 401da1097bc3b1995776c205707fd2b17603b804646Behdad EsfahbodDEFINE_NULL_DATA (Tag, 4, _NULL_TAG_INIT); 402da1097bc3b1995776c205707fd2b17603b804646Behdad Esfahbod#undef _NULL_TAG_INIT 4036b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod 4046b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod/* Glyph index number, same as uint16 (length = 16 bits) */ 4056ad8d5f3c7028147b371137ae4bca6aae66b3489Behdad Esfahbodtypedef USHORT GlyphID; 4066b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod 4071f437e6f47fb6c15761021bd2078f31778f2179cBehdad Esfahbod/* Offset to a table, same as uint16 (length = 16 bits), Null offset = 0x0000 */ 4086ad8d5f3c7028147b371137ae4bca6aae66b3489Behdad Esfahbodtypedef USHORT Offset; 4096ad8d5f3c7028147b371137ae4bca6aae66b3489Behdad Esfahbod 4106ad8d5f3c7028147b371137ae4bca6aae66b3489Behdad Esfahbod/* LongOffset to a table, same as uint32 (length = 32 bits), Null offset = 0x00000000 */ 4116ad8d5f3c7028147b371137ae4bca6aae66b3489Behdad Esfahbodtypedef ULONG LongOffset; 4126ad8d5f3c7028147b371137ae4bca6aae66b3489Behdad Esfahbod 4136b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod 4146b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod/* CheckSum */ 41560d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbodstruct CheckSum : ULONG 41660d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod{ 41760d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod static uint32_t CalcTableChecksum (ULONG *Table, uint32_t Length) 41860d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod { 4196b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod uint32_t Sum = 0L; 42001e4fcb032be601f272e62228881e2aabfb9d925Behdad Esfahbod ULONG *EndPtr = Table+((Length+3) & ~3) / sizeof(ULONG); 4216b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod 4226b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod while (Table < EndPtr) 4236b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod Sum += *Table++; 4246b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod return Sum; 4256b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod } 4266b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod}; 4278b8358033184198ff638ee1379093717596e162dBehdad EsfahbodASSERT_SIZE (CheckSum, 4); 4286b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod 4296b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod 4306b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod/* 4316b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod * Version Numbers 4326b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod */ 4336b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod 43487fcdcbe3644da10154688765db2d62eb9ac079aBehdad Esfahbodstruct FixedVersion 43560d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod{ 43609c292e3b688a67fbae67b645d1e6ffcf8d8eb6eBehdad Esfahbod inline operator uint32_t (void) const { return (major << 16) + minor; } 43796908b898476ca5d7da5f386b15be76f9e83d76eBehdad Esfahbod 438cd3827ee567612c5500206b62840702fc956e0f5Behdad Esfahbod inline bool sanitize (SANITIZE_ARG_DEF) { 439b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod SANITIZE_DEBUG (); 440cd3827ee567612c5500206b62840702fc956e0f5Behdad Esfahbod return SANITIZE_SELF (); 441cd3827ee567612c5500206b62840702fc956e0f5Behdad Esfahbod } 442cd3827ee567612c5500206b62840702fc956e0f5Behdad Esfahbod 4436ad8d5f3c7028147b371137ae4bca6aae66b3489Behdad Esfahbod USHORT major; 44487fcdcbe3644da10154688765db2d62eb9ac079aBehdad Esfahbod USHORT minor; 4456b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod}; 44687fcdcbe3644da10154688765db2d62eb9ac079aBehdad EsfahbodASSERT_SIZE (FixedVersion, 4); 4476b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod 44892b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod 44992b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod 4505f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod/* 45192b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod * Template subclasses of Offset and LongOffset that do the dereferencing. 45292b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod * Use: (this+memberName) 4535f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod */ 4545f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod 45592b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodtemplate <typename OffsetType, typename Type> 45692b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodstruct GenericOffsetTo : OffsetType 45792b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod{ 45892b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod inline const Type& operator() (const void *base) const 45992b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod { 46092b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod unsigned int offset = *this; 46192b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod if (HB_UNLIKELY (!offset)) return Null(Type); 46295639fccc1ef18eadeb737e8b611d1d1f1315fc2Behdad Esfahbod return CONST_CAST(Type, *CONST_CHARP(base), offset); 46392b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod } 46492b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod 46520b035dad41247076815a2bbb0346d63058b322fBehdad Esfahbod inline bool sanitize (SANITIZE_ARG_DEF, const void *base) { 466b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod SANITIZE_DEBUG (); 46795528131b5ab9fc9e265ace715832135ebd457a4Behdad Esfahbod if (!SANITIZE_SELF ()) return false; 46892b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod unsigned int offset = *this; 46992b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod if (HB_UNLIKELY (!offset)) return true; 470ac26e2a838d1266bb5f39c43245eb2a52c5e072dBehdad Esfahbod return SANITIZE (CAST(Type, *DECONST_CHARP(base), offset)) || NEUTER (DECONST_CAST(OffsetType,*this,0), 0); 47192b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod } 47220b035dad41247076815a2bbb0346d63058b322fBehdad Esfahbod inline bool sanitize (SANITIZE_ARG_DEF, const void *base, const void *base2) { 473b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod SANITIZE_DEBUG (); 47495528131b5ab9fc9e265ace715832135ebd457a4Behdad Esfahbod if (!SANITIZE_SELF ()) return false; 475b508e5ccd528f3f0f49f545bd5f30a525d5abd5aBehdad Esfahbod unsigned int offset = *this; 476b508e5ccd528f3f0f49f545bd5f30a525d5abd5aBehdad Esfahbod if (HB_UNLIKELY (!offset)) return true; 477b508e5ccd528f3f0f49f545bd5f30a525d5abd5aBehdad Esfahbod return SANITIZE_BASE (CAST(Type, *DECONST_CHARP(base), offset), base2) || NEUTER (DECONST_CAST(OffsetType,*this,0), 0); 478b508e5ccd528f3f0f49f545bd5f30a525d5abd5aBehdad Esfahbod } 47920b035dad41247076815a2bbb0346d63058b322fBehdad Esfahbod inline bool sanitize (SANITIZE_ARG_DEF, const void *base, unsigned int user_data) { 480b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod SANITIZE_DEBUG (); 48195528131b5ab9fc9e265ace715832135ebd457a4Behdad Esfahbod if (!SANITIZE_SELF ()) return false; 48242b778f89e0818fe06910ce04e2203485823da09Behdad Esfahbod unsigned int offset = *this; 48342b778f89e0818fe06910ce04e2203485823da09Behdad Esfahbod if (HB_UNLIKELY (!offset)) return true; 484ac26e2a838d1266bb5f39c43245eb2a52c5e072dBehdad Esfahbod return SANITIZE_BASE (CAST(Type, *DECONST_CHARP(base), offset), user_data) || NEUTER (DECONST_CAST(OffsetType,*this,0), 0); 48542b778f89e0818fe06910ce04e2203485823da09Behdad Esfahbod } 48692b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod}; 48792b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodtemplate <typename Base, typename OffsetType, typename Type> 48892b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodinline const Type& operator + (const Base &base, GenericOffsetTo<OffsetType, Type> offset) { return offset (base); } 48992b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod 4905f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbodtemplate <typename Type> 49192b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodstruct OffsetTo : GenericOffsetTo<Offset, Type> {}; 49292b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod 49392b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodtemplate <typename Type> 49492b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodstruct LongOffsetTo : GenericOffsetTo<LongOffset, Type> {}; 495bff3c0fde5da04a70d1f7aeeb9fa2a75fe5c07f6Behdad Esfahbod 496bff3c0fde5da04a70d1f7aeeb9fa2a75fe5c07f6Behdad Esfahbod 49792b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod/* 49892b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod * Array Types 49992b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod */ 50092b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod 50192b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodtemplate <typename LenType, typename Type> 50292b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodstruct GenericArrayOf 50360d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod{ 50460d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod inline const Type& operator [] (unsigned int i) const 50560d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod { 5065f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod if (HB_UNLIKELY (i >= len)) return Null(Type); 5075f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod return array[i]; 5085f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod } 50960d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod inline unsigned int get_size () const 51079420ad9caf2d5fc94c3693e8292edfa27060b2dBehdad Esfahbod { return sizeof (len) + len * sizeof (array[0]); } 511e8cbaaf6d538036ff9b880b018db402e0895ed01Behdad Esfahbod 51220b035dad41247076815a2bbb0346d63058b322fBehdad Esfahbod inline bool sanitize (SANITIZE_ARG_DEF) { 513b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod SANITIZE_DEBUG (); 514dc9c4d93cd0f3ac991f32df08c1c17fc389054c0Behdad Esfahbod if (!SANITIZE_GET_SIZE()) return false; 5153564ee5216004d45d30b0ded61184cf8dde5dd89Behdad Esfahbod /* Note: 5163564ee5216004d45d30b0ded61184cf8dde5dd89Behdad Esfahbod * for non-recursive types, this is not much needed. 5173564ee5216004d45d30b0ded61184cf8dde5dd89Behdad Esfahbod * But we keep the code to make sure the objects pointed to 5183564ee5216004d45d30b0ded61184cf8dde5dd89Behdad Esfahbod * do have a simple sanitize(). */ 5193564ee5216004d45d30b0ded61184cf8dde5dd89Behdad Esfahbod return true; 52070de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod unsigned int count = len; 52170de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod for (unsigned int i = 0; i < count; i++) 52270de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod if (!SANITIZE (array[i])) 52370de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod return false; 5249bd629ccd064e739789e504c41ad875eed93abbaBehdad Esfahbod return true; 52570de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod } 52620b035dad41247076815a2bbb0346d63058b322fBehdad Esfahbod inline bool sanitize (SANITIZE_ARG_DEF, const void *base) { 527b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod SANITIZE_DEBUG (); 528dc9c4d93cd0f3ac991f32df08c1c17fc389054c0Behdad Esfahbod if (!SANITIZE_GET_SIZE()) return false; 529e6ab2c59ba2d37942ac5fcbfe61d38b7e359ac8cBehdad Esfahbod unsigned int count = len; 530e6ab2c59ba2d37942ac5fcbfe61d38b7e359ac8cBehdad Esfahbod for (unsigned int i = 0; i < count; i++) 53195639fccc1ef18eadeb737e8b611d1d1f1315fc2Behdad Esfahbod if (!array[i].sanitize (SANITIZE_ARG, base)) 532e6ab2c59ba2d37942ac5fcbfe61d38b7e359ac8cBehdad Esfahbod return false; 5339bd629ccd064e739789e504c41ad875eed93abbaBehdad Esfahbod return true; 534e6ab2c59ba2d37942ac5fcbfe61d38b7e359ac8cBehdad Esfahbod } 53520b035dad41247076815a2bbb0346d63058b322fBehdad Esfahbod inline bool sanitize (SANITIZE_ARG_DEF, const void *base, const void *base2) { 536b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod SANITIZE_DEBUG (); 537b508e5ccd528f3f0f49f545bd5f30a525d5abd5aBehdad Esfahbod if (!SANITIZE_GET_SIZE()) return false; 538b508e5ccd528f3f0f49f545bd5f30a525d5abd5aBehdad Esfahbod unsigned int count = len; 539b508e5ccd528f3f0f49f545bd5f30a525d5abd5aBehdad Esfahbod for (unsigned int i = 0; i < count; i++) 540b508e5ccd528f3f0f49f545bd5f30a525d5abd5aBehdad Esfahbod if (!array[i].sanitize (SANITIZE_ARG, base, base2)) 541b508e5ccd528f3f0f49f545bd5f30a525d5abd5aBehdad Esfahbod return false; 5429bd629ccd064e739789e504c41ad875eed93abbaBehdad Esfahbod return true; 543b508e5ccd528f3f0f49f545bd5f30a525d5abd5aBehdad Esfahbod } 54420b035dad41247076815a2bbb0346d63058b322fBehdad Esfahbod inline bool sanitize (SANITIZE_ARG_DEF, const void *base, unsigned int user_data) { 545b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod SANITIZE_DEBUG (); 54642b778f89e0818fe06910ce04e2203485823da09Behdad Esfahbod if (!SANITIZE_GET_SIZE()) return false; 54742b778f89e0818fe06910ce04e2203485823da09Behdad Esfahbod unsigned int count = len; 54842b778f89e0818fe06910ce04e2203485823da09Behdad Esfahbod for (unsigned int i = 0; i < count; i++) 54942b778f89e0818fe06910ce04e2203485823da09Behdad Esfahbod if (!array[i].sanitize (SANITIZE_ARG, base, user_data)) 55042b778f89e0818fe06910ce04e2203485823da09Behdad Esfahbod return false; 5519bd629ccd064e739789e504c41ad875eed93abbaBehdad Esfahbod return true; 55242b778f89e0818fe06910ce04e2203485823da09Behdad Esfahbod } 55370de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod 55492b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod LenType len; 555e8cbaaf6d538036ff9b880b018db402e0895ed01Behdad Esfahbod Type array[]; 556e8cbaaf6d538036ff9b880b018db402e0895ed01Behdad Esfahbod}; 557e8cbaaf6d538036ff9b880b018db402e0895ed01Behdad Esfahbod 55892b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod/* An array with a USHORT number of elements. */ 55992b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodtemplate <typename Type> 56092b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodstruct ArrayOf : GenericArrayOf<USHORT, Type> {}; 56192b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod 56292b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod/* An array with a ULONG number of elements. */ 56392b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodtemplate <typename Type> 56492b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodstruct LongArrayOf : GenericArrayOf<ULONG, Type> {}; 56592b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod 56692b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod/* Array of Offset's */ 56792b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodtemplate <typename Type> 56892b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodstruct OffsetArrayOf : ArrayOf<OffsetTo<Type> > {}; 56992b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod 57092b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod/* Array of LongOffset's */ 57192b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodtemplate <typename Type> 57292b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodstruct LongOffsetArrayOf : ArrayOf<LongOffsetTo<Type> > {}; 57392b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod 57492b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod/* LongArray of LongOffset's */ 57592b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodtemplate <typename Type> 57692b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodstruct LongOffsetLongArrayOf : LongArrayOf<LongOffsetTo<Type> > {}; 57792b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod 57880e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod/* Array of offsets relative to the beginning of the array itself. */ 57980e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbodtemplate <typename Type> 58080e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbodstruct OffsetListOf : OffsetArrayOf<Type> 58180e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod{ 58280e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod inline const Type& operator [] (unsigned int i) const 58380e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod { 58480e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod if (HB_UNLIKELY (i >= this->len)) return Null(Type); 58580e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod return this+this->array[i]; 58680e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod } 58780e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod 58880e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod inline bool sanitize (SANITIZE_ARG_DEF) { 58980e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod SANITIZE_DEBUG (); 59080e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod return OffsetArrayOf<Type>::sanitize (SANITIZE_ARG, CONST_CHARP(this)); 59180e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod } 59280e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod inline bool sanitize (SANITIZE_ARG_DEF, unsigned int user_data) { 59380e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod SANITIZE_DEBUG (); 59480e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod return OffsetArrayOf<Type>::sanitize (SANITIZE_ARG, CONST_CHARP(this), user_data); 59580e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod } 59680e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod}; 59780e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod 59880e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod 599e8cbaaf6d538036ff9b880b018db402e0895ed01Behdad Esfahbod/* An array with a USHORT number of elements, 600e8cbaaf6d538036ff9b880b018db402e0895ed01Behdad Esfahbod * starting at second element. */ 601e8cbaaf6d538036ff9b880b018db402e0895ed01Behdad Esfahbodtemplate <typename Type> 60260d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbodstruct HeadlessArrayOf 60360d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod{ 60460d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod inline const Type& operator [] (unsigned int i) const 60560d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod { 606e8cbaaf6d538036ff9b880b018db402e0895ed01Behdad Esfahbod if (HB_UNLIKELY (i >= len || !i)) return Null(Type); 607e8cbaaf6d538036ff9b880b018db402e0895ed01Behdad Esfahbod return array[i-1]; 608e8cbaaf6d538036ff9b880b018db402e0895ed01Behdad Esfahbod } 60960d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod inline unsigned int get_size () const 61079420ad9caf2d5fc94c3693e8292edfa27060b2dBehdad Esfahbod { return sizeof (len) + (len ? len - 1 : 0) * sizeof (array[0]); } 6115f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod 61220b035dad41247076815a2bbb0346d63058b322fBehdad Esfahbod inline bool sanitize (SANITIZE_ARG_DEF) { 613b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod SANITIZE_DEBUG (); 614dc9c4d93cd0f3ac991f32df08c1c17fc389054c0Behdad Esfahbod if (!SANITIZE_GET_SIZE()) return false; 6153564ee5216004d45d30b0ded61184cf8dde5dd89Behdad Esfahbod /* Note: 6163564ee5216004d45d30b0ded61184cf8dde5dd89Behdad Esfahbod * for non-recursive types, this is not much needed. 6173564ee5216004d45d30b0ded61184cf8dde5dd89Behdad Esfahbod * But we keep the code to make sure the objects pointed to 6183564ee5216004d45d30b0ded61184cf8dde5dd89Behdad Esfahbod * do have a simple sanitize(). */ 6193564ee5216004d45d30b0ded61184cf8dde5dd89Behdad Esfahbod return true; 62015164d9258a74122a4db748d35532bd72c47cec2Behdad Esfahbod unsigned int count = len ? len - 1 : 0; 62170de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod for (unsigned int i = 0; i < count; i++) 62270de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod if (!SANITIZE (array[i])) 62370de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod return false; 6249bd629ccd064e739789e504c41ad875eed93abbaBehdad Esfahbod return true; 62570de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod } 62670de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod 6275f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod USHORT len; 6285f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod Type array[]; 6295f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod}; 6305f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod 6316b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod 6325f5b24f99f52bbc922e238b65c06061ba07c8548Behdad Esfahbod#endif /* HB_OPEN_TYPES_PRIVATE_HH */ 633