hb-open-type-private.hh revision 40cbefe858192531ed64dd51d402f7ca7b8153a3
164aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod/* 2f9b37727985191c9b4aedb0e9835736027e59260Behdad Esfahbod * Copyright (C) 2007,2008,2009,2010 Red Hat, Inc. 364aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * 4c755cb3e3ac55156d0d2ec05adea7a650b97cc41Behdad Esfahbod * This is part of HarfBuzz, a text shaping 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 35c85c3620675f38ffdca59134aeec2641485f40caBehdad Esfahbod/* Table/script/language-system/feature/... not found */ 36706ab25a4cb043d46e6088aa0a7184ee200276c9Behdad Esfahbod#define NO_INDEX ((unsigned int) 0xFFFF) 375a0b791184cf6ef39eae0570e14aca21abc32845Behdad Esfahbod 38706ab25a4cb043d46e6088aa0a7184ee200276c9Behdad Esfahbod 39a3263aa773ad7a914496792466c69047048b093cBehdad Esfahbod 40196598bbccff08415ff5192314cba044df258cadBehdad Esfahbod/* 41196598bbccff08415ff5192314cba044df258cadBehdad Esfahbod * Casts 42196598bbccff08415ff5192314cba044df258cadBehdad Esfahbod */ 43196598bbccff08415ff5192314cba044df258cadBehdad Esfahbod 440dfcc13a4668cdd2c2ebdd5f4a7540a51222cf2fBehdad Esfahbod/* Cast to "const char *" and "char *" */ 45a3263aa773ad7a914496792466c69047048b093cBehdad Esfahbodtemplate <typename Type> 46a3263aa773ad7a914496792466c69047048b093cBehdad Esfahbodinline const char * CharP (const Type* X) 47a3263aa773ad7a914496792466c69047048b093cBehdad Esfahbod{ return reinterpret_cast<const char *>(X); } 48a3263aa773ad7a914496792466c69047048b093cBehdad Esfahbodtemplate <typename Type> 49a3263aa773ad7a914496792466c69047048b093cBehdad Esfahbodinline char * CharP (Type* X) 50a3263aa773ad7a914496792466c69047048b093cBehdad Esfahbod{ return reinterpret_cast<char *>(X); } 512b5a59c277f4c5bf7aac9a9005054763e322e02dBehdad Esfahbod 52187454c595559ce48d072fee6bccb51f3de283d4Behdad Esfahbod/* Cast to struct T, reference to reference */ 53a3263aa773ad7a914496792466c69047048b093cBehdad Esfahbodtemplate<typename Type, typename TObject> 54187454c595559ce48d072fee6bccb51f3de283d4Behdad Esfahbodinline const Type& CastR(const TObject &X) 55a3263aa773ad7a914496792466c69047048b093cBehdad Esfahbod{ return reinterpret_cast<const Type&> (X); } 56a3263aa773ad7a914496792466c69047048b093cBehdad Esfahbodtemplate<typename Type, typename TObject> 57187454c595559ce48d072fee6bccb51f3de283d4Behdad Esfahbodinline Type& CastR(TObject &X) 58a3263aa773ad7a914496792466c69047048b093cBehdad Esfahbod{ return reinterpret_cast<Type&> (X); } 59196598bbccff08415ff5192314cba044df258cadBehdad Esfahbod 60187454c595559ce48d072fee6bccb51f3de283d4Behdad Esfahbod/* Cast to struct T, pointer to pointer */ 61187454c595559ce48d072fee6bccb51f3de283d4Behdad Esfahbodtemplate<typename Type, typename TObject> 62187454c595559ce48d072fee6bccb51f3de283d4Behdad Esfahbodinline const Type* CastP(const TObject *X) 63187454c595559ce48d072fee6bccb51f3de283d4Behdad Esfahbod{ return reinterpret_cast<const Type*> (X); } 64187454c595559ce48d072fee6bccb51f3de283d4Behdad Esfahbodtemplate<typename Type, typename TObject> 65187454c595559ce48d072fee6bccb51f3de283d4Behdad Esfahbodinline Type* CastP(TObject *X) 66187454c595559ce48d072fee6bccb51f3de283d4Behdad Esfahbod{ return reinterpret_cast<Type*> (X); } 67187454c595559ce48d072fee6bccb51f3de283d4Behdad Esfahbod 6809766b1ec5ec55a61edbcd7a89ed3613cc92d4cbBehdad Esfahbod/* StructAtOffset<T>(P,Ofs) returns the struct T& that is placed at memory 6909766b1ec5ec55a61edbcd7a89ed3613cc92d4cbBehdad Esfahbod * location pointed to by P plus Ofs bytes. */ 7009766b1ec5ec55a61edbcd7a89ed3613cc92d4cbBehdad Esfahbodtemplate<typename Type> 7109766b1ec5ec55a61edbcd7a89ed3613cc92d4cbBehdad Esfahbodinline const Type& StructAtOffset(const void *P, unsigned int offset) 7209766b1ec5ec55a61edbcd7a89ed3613cc92d4cbBehdad Esfahbod{ return * reinterpret_cast<const Type*> (CharP(P) + offset); } 7309766b1ec5ec55a61edbcd7a89ed3613cc92d4cbBehdad Esfahbodtemplate<typename Type> 7409766b1ec5ec55a61edbcd7a89ed3613cc92d4cbBehdad Esfahbodinline Type& StructAtOffset(void *P, unsigned int offset) 7509766b1ec5ec55a61edbcd7a89ed3613cc92d4cbBehdad Esfahbod{ return * reinterpret_cast<Type*> (CharP(P) + offset); } 7670de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod 772e2f43edf2f49f4047e28b1ce2ea95938536de9cBehdad Esfahbod/* StructAfter<T>(X) returns the struct T& that is placed after X. 7829c3f5e1b6212c775a7b911becd44ba093b7b0ebBehdad Esfahbod * Works with X of variable size also. X must implement get_size() */ 79e961c86c579fd98ee604342a9c70c4e7f8d4f220Behdad Esfahbodtemplate<typename Type, typename TObject> 80e961c86c579fd98ee604342a9c70c4e7f8d4f220Behdad Esfahbodinline const Type& StructAfter(const TObject &X) 8109766b1ec5ec55a61edbcd7a89ed3613cc92d4cbBehdad Esfahbod{ return StructAtOffset<Type>(&X, X.get_size()); } 82e961c86c579fd98ee604342a9c70c4e7f8d4f220Behdad Esfahbodtemplate<typename Type, typename TObject> 83e961c86c579fd98ee604342a9c70c4e7f8d4f220Behdad Esfahbodinline Type& StructAfter(TObject &X) 8409766b1ec5ec55a61edbcd7a89ed3613cc92d4cbBehdad Esfahbod{ return StructAtOffset<Type>(&X, X.get_size()); } 85a3263aa773ad7a914496792466c69047048b093cBehdad Esfahbod 86e961c86c579fd98ee604342a9c70c4e7f8d4f220Behdad Esfahbod 87d3480ba37fbb5d4be75b094060f5b2f1ce98fb53Behdad Esfahbod 8870de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod/* 89e45d3f86f9a5f3d29ca35a282de7f98e702878f9Behdad Esfahbod * Size checking 90e45d3f86f9a5f3d29ca35a282de7f98e702878f9Behdad Esfahbod */ 91e45d3f86f9a5f3d29ca35a282de7f98e702878f9Behdad Esfahbod 920abcc3b48cfd51a22695c9e988938b2f45cb19d8Behdad Esfahbod#define ASSERT_SIZE(_thing, _size) ASSERT_STATIC (sizeof (_thing) == (_size)) 930abcc3b48cfd51a22695c9e988938b2f45cb19d8Behdad Esfahbod 940abcc3b48cfd51a22695c9e988938b2f45cb19d8Behdad Esfahbod#define _DEFINE_SIZE_ASSERTION(_size) \ 950abcc3b48cfd51a22695c9e988938b2f45cb19d8Behdad Esfahbod inline void _size_assertion (void) const { ASSERT_SIZE (*this, _size); } 960abcc3b48cfd51a22695c9e988938b2f45cb19d8Behdad Esfahbod 970abcc3b48cfd51a22695c9e988938b2f45cb19d8Behdad Esfahbod 98e45d3f86f9a5f3d29ca35a282de7f98e702878f9Behdad Esfahbod#define DEFINE_SIZE_STATIC(size) \ 990abcc3b48cfd51a22695c9e988938b2f45cb19d8Behdad Esfahbod _DEFINE_SIZE_ASSERTION (size); \ 100e45d3f86f9a5f3d29ca35a282de7f98e702878f9Behdad Esfahbod static inline unsigned int get_size (void) { return (size); } \ 101e45d3f86f9a5f3d29ca35a282de7f98e702878f9Behdad Esfahbod static const unsigned int static_size = (size); \ 102e45d3f86f9a5f3d29ca35a282de7f98e702878f9Behdad Esfahbod static const unsigned int min_size = (size) 103e45d3f86f9a5f3d29ca35a282de7f98e702878f9Behdad Esfahbod 104b3651231bf80bb7009214547a75ed90e21815c68Behdad Esfahbod/* Size signifying variable-sized array */ 105b3651231bf80bb7009214547a75ed90e21815c68Behdad Esfahbod#define VAR 1 106b3651231bf80bb7009214547a75ed90e21815c68Behdad Esfahbod#define VAR0 (VAR+0) 107b3651231bf80bb7009214547a75ed90e21815c68Behdad Esfahbod 108bea34c7cbb583cf7660776e95cab3171590b8427Behdad Esfahbod#define DEFINE_SIZE_MIN(size) \ 109b3651231bf80bb7009214547a75ed90e21815c68Behdad Esfahbod static const unsigned int min_size = (size) 110b3651231bf80bb7009214547a75ed90e21815c68Behdad Esfahbod 111e45d3f86f9a5f3d29ca35a282de7f98e702878f9Behdad Esfahbod#define DEFINE_SIZE_VAR(size, _var_type) \ 1120abcc3b48cfd51a22695c9e988938b2f45cb19d8Behdad Esfahbod _DEFINE_SIZE_ASSERTION ((size) + VAR0 * sizeof (_var_type)); \ 113e45d3f86f9a5f3d29ca35a282de7f98e702878f9Behdad Esfahbod static const unsigned int min_size = (size) 114e45d3f86f9a5f3d29ca35a282de7f98e702878f9Behdad Esfahbod 115569da92bc6956f42d9b2d65c784e184fb6380efeBehdad Esfahbod#define DEFINE_SIZE_VAR2(size, _var_type1, _var_type2) \ 1160abcc3b48cfd51a22695c9e988938b2f45cb19d8Behdad Esfahbod _DEFINE_SIZE_ASSERTION ((size) + VAR0 * sizeof (_var_type1) + VAR0 * sizeof (_var_type2)); \ 117e45d3f86f9a5f3d29ca35a282de7f98e702878f9Behdad Esfahbod static const unsigned int min_size = (size) 118e45d3f86f9a5f3d29ca35a282de7f98e702878f9Behdad Esfahbod 119e45d3f86f9a5f3d29ca35a282de7f98e702878f9Behdad Esfahbod 120e45d3f86f9a5f3d29ca35a282de7f98e702878f9Behdad Esfahbod 121e45d3f86f9a5f3d29ca35a282de7f98e702878f9Behdad Esfahbod/* 122f0abcd69408a3af65207cdf8847575ade4579bd4Behdad Esfahbod * Null objects 123600e5eb80f553ea8eb862e6784133574c74ca513Behdad Esfahbod */ 124600e5eb80f553ea8eb862e6784133574c74ca513Behdad Esfahbod 1258b8358033184198ff638ee1379093717596e162dBehdad Esfahbod/* Global nul-content Null pool. Enlarge as necessary. */ 1269d3677899f90abdc7fb3e3d854db654a8707a84bBehdad Esfahbodstatic const void *_NullPool[32 / sizeof (void *)]; 1278b8358033184198ff638ee1379093717596e162dBehdad Esfahbod 1288b8358033184198ff638ee1379093717596e162dBehdad Esfahbod/* Generic template for nul-content sizeof-sized Null objects. */ 1298b8358033184198ff638ee1379093717596e162dBehdad Esfahbodtemplate <typename Type> 1309d3677899f90abdc7fb3e3d854db654a8707a84bBehdad Esfahbodstatic inline const Type& Null () { 1319d3677899f90abdc7fb3e3d854db654a8707a84bBehdad Esfahbod ASSERT_STATIC (sizeof (Type) <= sizeof (_NullPool)); 132187454c595559ce48d072fee6bccb51f3de283d4Behdad Esfahbod return *CastP<Type> (_NullPool); 1339d3677899f90abdc7fb3e3d854db654a8707a84bBehdad Esfahbod} 1348b8358033184198ff638ee1379093717596e162dBehdad Esfahbod 1358b8358033184198ff638ee1379093717596e162dBehdad Esfahbod/* Specializaiton for arbitrary-content arbitrary-sized Null objects. */ 13665f46b00333e20ab8a52a4b350747507541ec1dbBehdad Esfahbod#define DEFINE_NULL_DATA(Type, data) \ 13765f46b00333e20ab8a52a4b350747507541ec1dbBehdad Esfahbodstatic const char _Null##Type[Type::min_size + 1] = data; /* +1 is for nul-termination in data */ \ 1388b8358033184198ff638ee1379093717596e162dBehdad Esfahbodtemplate <> \ 1399d3677899f90abdc7fb3e3d854db654a8707a84bBehdad Esfahbodinline const Type& Null<Type> () { \ 140187454c595559ce48d072fee6bccb51f3de283d4Behdad Esfahbod return *CastP<Type> (_Null##Type); \ 141565c80bd2960366ace2d10dd71beaaf2a80213c8Behdad Esfahbod} /* The following line really exists such that we end in a place needing semicolon */ \ 142bea34c7cbb583cf7660776e95cab3171590b8427Behdad EsfahbodASSERT_STATIC (Type::min_size + 1 <= sizeof (_Null##Type)) 1438b8358033184198ff638ee1379093717596e162dBehdad Esfahbod 1448b8358033184198ff638ee1379093717596e162dBehdad Esfahbod/* Accessor macro. */ 1459d3677899f90abdc7fb3e3d854db654a8707a84bBehdad Esfahbod#define Null(Type) Null<Type>() 1468b8358033184198ff638ee1379093717596e162dBehdad Esfahbod 1478b8358033184198ff638ee1379093717596e162dBehdad Esfahbod 14820e3dd5d292b65f70d2eae63b8d8713a1c889d47Behdad Esfahbod/* 149dfc8cbe85479dde1ffdc6b2e73f4907331d77a19Behdad Esfahbod * Trace 15020e3dd5d292b65f70d2eae63b8d8713a1c889d47Behdad Esfahbod */ 15120e3dd5d292b65f70d2eae63b8d8713a1c889d47Behdad Esfahbod 152dfc8cbe85479dde1ffdc6b2e73f4907331d77a19Behdad Esfahbod 153dfc8cbe85479dde1ffdc6b2e73f4907331d77a19Behdad Esfahbodtemplate <int max_depth> 154dfc8cbe85479dde1ffdc6b2e73f4907331d77a19Behdad Esfahbodstruct hb_trace_t { 155dfc8cbe85479dde1ffdc6b2e73f4907331d77a19Behdad Esfahbod explicit hb_trace_t (unsigned int *pdepth) : pdepth(pdepth) { if (max_depth) ++*pdepth; } 156dfc8cbe85479dde1ffdc6b2e73f4907331d77a19Behdad Esfahbod ~hb_trace_t (void) { if (max_depth) --*pdepth; } 157dfc8cbe85479dde1ffdc6b2e73f4907331d77a19Behdad Esfahbod 158dfc8cbe85479dde1ffdc6b2e73f4907331d77a19Behdad Esfahbod inline void log (const char *what, const char *function, const void *obj) 159dfc8cbe85479dde1ffdc6b2e73f4907331d77a19Behdad Esfahbod { 160dfc8cbe85479dde1ffdc6b2e73f4907331d77a19Behdad Esfahbod if (*pdepth < max_depth) 161dfc8cbe85479dde1ffdc6b2e73f4907331d77a19Behdad Esfahbod fprintf (stderr, "%s(%p) %-*d-> %s\n", what, obj, *pdepth, *pdepth, function); 162dfc8cbe85479dde1ffdc6b2e73f4907331d77a19Behdad Esfahbod } 16320e3dd5d292b65f70d2eae63b8d8713a1c889d47Behdad Esfahbod 16420e3dd5d292b65f70d2eae63b8d8713a1c889d47Behdad Esfahbod private: 165dfc8cbe85479dde1ffdc6b2e73f4907331d77a19Behdad Esfahbod unsigned int *pdepth; 16620e3dd5d292b65f70d2eae63b8d8713a1c889d47Behdad Esfahbod}; 167dfc8cbe85479dde1ffdc6b2e73f4907331d77a19Behdad Esfahbodtemplate <> /* Optimize when tracing is disabled */ 168dfc8cbe85479dde1ffdc6b2e73f4907331d77a19Behdad Esfahbodstruct hb_trace_t<0> { 169dfc8cbe85479dde1ffdc6b2e73f4907331d77a19Behdad Esfahbod explicit hb_trace_t (unsigned int *p) {} 170dfc8cbe85479dde1ffdc6b2e73f4907331d77a19Behdad Esfahbod inline void log (const char *what, const char *function, const void *obj) {}; 17120e3dd5d292b65f70d2eae63b8d8713a1c889d47Behdad Esfahbod}; 17220e3dd5d292b65f70d2eae63b8d8713a1c889d47Behdad Esfahbod 17320e3dd5d292b65f70d2eae63b8d8713a1c889d47Behdad Esfahbod 174600e5eb80f553ea8eb862e6784133574c74ca513Behdad Esfahbod 175577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod/* 176577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod * Sanitize 177577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod */ 178577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod 17995e202403ffa543c817f45cca21fbc116eb8e807Behdad Esfahbod#ifndef HB_DEBUG_SANITIZE 180807c5b03a2251a3c29a520852639421783101b55Behdad Esfahbod#define HB_DEBUG_SANITIZE HB_DEBUG+0 18195e202403ffa543c817f45cca21fbc116eb8e807Behdad Esfahbod#endif 18295e202403ffa543c817f45cca21fbc116eb8e807Behdad Esfahbod 18320e3dd5d292b65f70d2eae63b8d8713a1c889d47Behdad Esfahbod 184bc200457430c083914a64bf4b056153506749610Behdad Esfahbod#define TRACE_SANITIZE() \ 185dfc8cbe85479dde1ffdc6b2e73f4907331d77a19Behdad Esfahbod hb_trace_t<HB_DEBUG_SANITIZE> trace (&context->debug_depth); \ 186dfc8cbe85479dde1ffdc6b2e73f4907331d77a19Behdad Esfahbod trace.log ("SANITIZE", HB_FUNC, this); 187807c5b03a2251a3c29a520852639421783101b55Behdad Esfahbod 188b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod 1891376fb7bf9ef07970f0ba13dc64d6a8ab8252762Behdad Esfahbodstruct hb_sanitize_context_t 190577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod{ 19198daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod inline void init (hb_blob_t *blob) 19298daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod { 19398daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod this->blob = hb_blob_reference (blob); 19498daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod this->start = hb_blob_lock (blob); 19598daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod this->end = this->start + hb_blob_get_length (blob); 19698daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod this->writable = hb_blob_is_writable (blob); 19798daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod this->edit_count = 0; 19820e3dd5d292b65f70d2eae63b8d8713a1c889d47Behdad Esfahbod this->debug_depth = 0; 199577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod 20098daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod if (HB_DEBUG_SANITIZE) 20198daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod fprintf (stderr, "sanitize %p init [%p..%p] (%u bytes)\n", 20298daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod this->blob, this->start, this->end, this->end - this->start); 20398daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod } 2041376fb7bf9ef07970f0ba13dc64d6a8ab8252762Behdad Esfahbod 20598daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod inline void finish (void) 20698daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod { 20798daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod if (HB_DEBUG_SANITIZE) 20898daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod fprintf (stderr, "sanitize %p fini [%p..%p] %u edit requests\n", 20998daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod this->blob, this->start, this->end, this->edit_count); 210577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod 21198daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod hb_blob_unlock (this->blob); 21298daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod hb_blob_destroy (this->blob); 21398daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod this->blob = NULL; 21498daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod this->start = this->end = NULL; 21598daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod } 2164f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbod 2174ad2cc5dec6b0639da2b1846282bdd99d06d5ff1Behdad Esfahbod inline bool check_range (const void *base, unsigned int len) const 21898daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod { 21998daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod bool ret = this->start <= base && 22098daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod base <= this->end && 2211cd1e117d060d38e314618b627d7663cb01ed584Behdad Esfahbod (unsigned int) (this->end - CharP(base)) >= len; 22298daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod 22320e3dd5d292b65f70d2eae63b8d8713a1c889d47Behdad Esfahbod if (HB_DEBUG_SANITIZE && (int) this->debug_depth < (int) HB_DEBUG_SANITIZE) \ 2244ad2cc5dec6b0639da2b1846282bdd99d06d5ff1Behdad Esfahbod fprintf (stderr, "SANITIZE(%p) %-*d-> range [%p..%p] (%d bytes) in [%p..%p] -> %s\n", \ 22598daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod base, 22620e3dd5d292b65f70d2eae63b8d8713a1c889d47Behdad Esfahbod this->debug_depth, this->debug_depth, 22740cbefe858192531ed64dd51d402f7ca7b8153a3Behdad Esfahbod base, CharP(base) + len, len, 22898daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod this->start, this->end, 22998daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod ret ? "pass" : "FAIL"); 23098daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod 23127e302dc8e794ff6bf878bc76e17d336d510849eBehdad Esfahbod return likely (ret); 23298daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod } 233577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod 2341cd1e117d060d38e314618b627d7663cb01ed584Behdad Esfahbod inline bool check_array (const void *base, unsigned int record_size, unsigned int len) const 23598daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod { 23698daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod bool overflows = len >= ((unsigned int) -1) / record_size; 23741895506cb6a41b1a833866f8822261ea449ea0bBehdad Esfahbod 23820e3dd5d292b65f70d2eae63b8d8713a1c889d47Behdad Esfahbod if (HB_DEBUG_SANITIZE && (int) this->debug_depth < (int) HB_DEBUG_SANITIZE) 23998daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod fprintf (stderr, "SANITIZE(%p) %-*d-> array [%p..%p] (%d*%d=%ld bytes) in [%p..%p] -> %s\n", \ 24098daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod base, 24120e3dd5d292b65f70d2eae63b8d8713a1c889d47Behdad Esfahbod this->debug_depth, this->debug_depth, 2421cd1e117d060d38e314618b627d7663cb01ed584Behdad Esfahbod base, CharP(base) + (record_size * len), record_size, len, (unsigned long) record_size * len, 24398daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod this->start, this->end, 24498daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod !overflows ? "does not overflow" : "OVERFLOWS FAIL"); 245fa030175ca998b00cc42cbced6e98de323ec01ecBehdad Esfahbod 2464ad2cc5dec6b0639da2b1846282bdd99d06d5ff1Behdad Esfahbod return likely (!overflows && this->check_range (base, record_size * len)); 24798daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod } 248254933c397f1ce9796f59689a25f9fc2e58df4eaBehdad Esfahbod 249b157617644d1e38f680163889d1dc2e2f64d9ba3Behdad Esfahbod template <typename Type> 250b157617644d1e38f680163889d1dc2e2f64d9ba3Behdad Esfahbod inline bool check_struct (const Type *obj) const 251b157617644d1e38f680163889d1dc2e2f64d9ba3Behdad Esfahbod { 252b157617644d1e38f680163889d1dc2e2f64d9ba3Behdad Esfahbod return likely (this->check_range (obj, sizeof (*obj))); 253b157617644d1e38f680163889d1dc2e2f64d9ba3Behdad Esfahbod } 254b157617644d1e38f680163889d1dc2e2f64d9ba3Behdad Esfahbod 25540cbefe858192531ed64dd51d402f7ca7b8153a3Behdad Esfahbod inline bool can_edit (const void *base HB_UNUSED, unsigned int len HB_UNUSED) 25698daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod { 25798daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod this->edit_count++; 25898daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod 25920e3dd5d292b65f70d2eae63b8d8713a1c889d47Behdad Esfahbod if (HB_DEBUG_SANITIZE && (int) this->debug_depth < (int) HB_DEBUG_SANITIZE) 26098daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod fprintf (stderr, "SANITIZE(%p) %-*d-> edit(%u) [%p..%p] (%d bytes) in [%p..%p] -> %s\n", \ 26198daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod base, 26220e3dd5d292b65f70d2eae63b8d8713a1c889d47Behdad Esfahbod this->debug_depth, this->debug_depth, 26398daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod this->edit_count, 26440cbefe858192531ed64dd51d402f7ca7b8153a3Behdad Esfahbod base, CharP(base)+len, len, 26598daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod this->start, this->end, 26698daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod this->writable ? "granted" : "REJECTED"); 26798daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod 26898daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod return this->writable; 26998daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod } 27098daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod 271705e215268aa95c2bc6af8af9b48b72b690ec1f7Behdad Esfahbod unsigned int debug_depth; 27298daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod const char *start, *end; 27398daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod bool writable; 27498daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod unsigned int edit_count; 27598daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod hb_blob_t *blob; 27698daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod}; 277815a73e4202ca17677f12e862b70ca8724cf2f57Behdad Esfahbod 278577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod 279577c1116493d785d3455626612f97dabb383abf0Behdad Esfahbod 2804e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod/* Template to sanitize an object. */ 2814e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbodtemplate <typename Type> 2824e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbodstruct Sanitizer 2834e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod{ 2844e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod static hb_blob_t *sanitize (hb_blob_t *blob) { 285705e215268aa95c2bc6af8af9b48b72b690ec1f7Behdad Esfahbod hb_sanitize_context_t context[1] = {{0}}; 2864e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod bool sane; 2874e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod 288d0b657379bbe63602953412d6bc944b2a0f430ebBehdad Esfahbod /* TODO is_sane() stuff */ 2894e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod 2904e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod retry: 291fa030175ca998b00cc42cbced6e98de323ec01ecBehdad Esfahbod if (HB_DEBUG_SANITIZE) 2927d3a126334f8e6f6441561c1bb592bd3fa7a2c5cBehdad Esfahbod fprintf (stderr, "Sanitizer %p start %s\n", blob, HB_FUNC); 2934f3ad9115a4161fc23fa559c26082440196217ecBehdad Esfahbod 29498daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod context->init (blob); 2954e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod 29627e302dc8e794ff6bf878bc76e17d336d510849eBehdad Esfahbod Type *t = CastP<Type> (const_cast<char *> (context->start)); 2974e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod 29839840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod sane = t->sanitize (context); 2994e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod if (sane) { 30027e302dc8e794ff6bf878bc76e17d336d510849eBehdad Esfahbod if (context->edit_count) { 301fa030175ca998b00cc42cbced6e98de323ec01ecBehdad Esfahbod if (HB_DEBUG_SANITIZE) 302fa030175ca998b00cc42cbced6e98de323ec01ecBehdad Esfahbod fprintf (stderr, "Sanitizer %p passed first round with %d edits; doing a second round %s\n", 30327e302dc8e794ff6bf878bc76e17d336d510849eBehdad Esfahbod blob, context->edit_count, HB_FUNC); 304fa030175ca998b00cc42cbced6e98de323ec01ecBehdad Esfahbod 3058b5346130425c7c101f6ff2432874ba2fd372edcBehdad Esfahbod /* sanitize again to ensure no toe-stepping */ 30627e302dc8e794ff6bf878bc76e17d336d510849eBehdad Esfahbod context->edit_count = 0; 30739840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod sane = t->sanitize (context); 30827e302dc8e794ff6bf878bc76e17d336d510849eBehdad Esfahbod if (context->edit_count) { 309fa030175ca998b00cc42cbced6e98de323ec01ecBehdad Esfahbod if (HB_DEBUG_SANITIZE) 310fa030175ca998b00cc42cbced6e98de323ec01ecBehdad Esfahbod fprintf (stderr, "Sanitizer %p requested %d edits in second round; FAILLING %s\n", 31127e302dc8e794ff6bf878bc76e17d336d510849eBehdad Esfahbod blob, context->edit_count, HB_FUNC); 3124e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod sane = false; 3134e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod } 3144e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod } 31598daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod context->finish (); 3164e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod } else { 31727e302dc8e794ff6bf878bc76e17d336d510849eBehdad Esfahbod unsigned int edit_count = context->edit_count; 31898daaf183d6dbf2b68959da608cd9876ba55d7aaBehdad Esfahbod context->finish (); 319977eeb714454630bd045bb11f58ff6397f10b143Behdad Esfahbod if (edit_count && !hb_blob_is_writable (blob) && hb_blob_try_writable (blob)) { 320977eeb714454630bd045bb11f58ff6397f10b143Behdad Esfahbod /* ok, we made it writable by relocating. try again */ 321fa030175ca998b00cc42cbced6e98de323ec01ecBehdad Esfahbod if (HB_DEBUG_SANITIZE) 3227d3a126334f8e6f6441561c1bb592bd3fa7a2c5cBehdad Esfahbod fprintf (stderr, "Sanitizer %p retry %s\n", blob, HB_FUNC); 3234e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod goto retry; 3244e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod } 3254e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod } 3264e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod 327fa030175ca998b00cc42cbced6e98de323ec01ecBehdad Esfahbod if (HB_DEBUG_SANITIZE) 3287d3a126334f8e6f6441561c1bb592bd3fa7a2c5cBehdad Esfahbod fprintf (stderr, "Sanitizer %p %s %s\n", blob, sane ? "passed" : "FAILED", HB_FUNC); 3294e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod if (sane) 3304e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod return blob; 3314e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod else { 3324e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod hb_blob_destroy (blob); 3334e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod return hb_blob_create_empty (); 3344e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod } 3354e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod } 3364e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod}; 3374e8a0602bb0b3cbf7f26cc38790e37cdec7b0b37Behdad Esfahbod 3382d15e72c75931398db5e027e660f1320bb979117Behdad Esfahbod 339f0abcd69408a3af65207cdf8847575ade4579bd4Behdad Esfahbod 340f0abcd69408a3af65207cdf8847575ade4579bd4Behdad Esfahbod 341b6e62bc5db76ae342177b2b646c37f45eccad975Behdad Esfahbod/* 342b6e62bc5db76ae342177b2b646c37f45eccad975Behdad Esfahbod * 343bff3c0fde5da04a70d1f7aeeb9fa2a75fe5c07f6Behdad Esfahbod * The OpenType Font File: Data Types 344b6e62bc5db76ae342177b2b646c37f45eccad975Behdad Esfahbod */ 345b6e62bc5db76ae342177b2b646c37f45eccad975Behdad Esfahbod 346b6e62bc5db76ae342177b2b646c37f45eccad975Behdad Esfahbod 347b6e62bc5db76ae342177b2b646c37f45eccad975Behdad Esfahbod/* "The following data types are used in the OpenType font file. 348b6e62bc5db76ae342177b2b646c37f45eccad975Behdad Esfahbod * All OpenType fonts use Motorola-style byte ordering (Big Endian):" */ 349b6e62bc5db76ae342177b2b646c37f45eccad975Behdad Esfahbod 3505f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod/* 3515f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod * Int types 3525f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod */ 3535f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod 3546b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod 355e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbodtemplate <typename Type, int Bytes> class BEInt; 356e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbod 357f1aaa2a43654c28405ffd393de2cb127437c99a5Behdad Esfahbod/* LONGTERMTODO: On machines allowing unaligned access, we can make the 358f1aaa2a43654c28405ffd393de2cb127437c99a5Behdad Esfahbod * following tighter by using byteswap instructions on ints directly. */ 359e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbodtemplate <typename Type> 360e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbodclass BEInt<Type, 2> 361e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbod{ 362e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbod public: 36301c01618e98283611628cd54d5ba4bf122f24cd9Behdad Esfahbod inline class BEInt<Type,2>& operator = (Type i) { hb_be_uint16_put (v,i); return *this; } 36401c01618e98283611628cd54d5ba4bf122f24cd9Behdad Esfahbod inline operator Type () const { return hb_be_uint16_get (v); } 36501c01618e98283611628cd54d5ba4bf122f24cd9Behdad Esfahbod inline bool operator == (const BEInt<Type, 2>& o) const { return hb_be_uint16_cmp (v, o.v); } 36601c01618e98283611628cd54d5ba4bf122f24cd9Behdad Esfahbod inline bool operator != (const BEInt<Type, 2>& o) const { return !(*this == o); } 367e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbod private: uint8_t v[2]; 368e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbod}; 369e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbodtemplate <typename Type> 370e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbodclass BEInt<Type, 4> 371e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbod{ 372e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbod public: 37301c01618e98283611628cd54d5ba4bf122f24cd9Behdad Esfahbod inline class BEInt<Type,4>& operator = (Type i) { hb_be_uint32_put (v,i); return *this; } 37401c01618e98283611628cd54d5ba4bf122f24cd9Behdad Esfahbod inline operator Type () const { return hb_be_uint32_get (v); } 37501c01618e98283611628cd54d5ba4bf122f24cd9Behdad Esfahbod inline bool operator == (const BEInt<Type, 4>& o) const { return hb_be_uint32_cmp (v, o.v); } 37601c01618e98283611628cd54d5ba4bf122f24cd9Behdad Esfahbod inline bool operator != (const BEInt<Type, 4>& o) const { return !(*this == o); } 377e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbod private: uint8_t v[4]; 378e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbod}; 379e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbod 3802467c669c2aee4de2a6621a9d06cba0262376d41Behdad Esfahbod/* Integer types in big-endian order and no alignment requirement */ 381e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbodtemplate <typename Type> 382e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbodstruct IntType 383e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbod{ 38401c01618e98283611628cd54d5ba4bf122f24cd9Behdad Esfahbod inline void set (Type i) { v = i; } 38501c01618e98283611628cd54d5ba4bf122f24cd9Behdad Esfahbod inline operator Type(void) const { return v; } 38601c01618e98283611628cd54d5ba4bf122f24cd9Behdad Esfahbod inline bool operator == (const IntType<Type> &o) const { return v == o.v; } 38701c01618e98283611628cd54d5ba4bf122f24cd9Behdad Esfahbod inline bool operator != (const IntType<Type> &o) const { return v != o.v; } 38839840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod inline bool sanitize (hb_sanitize_context_t *context) { 389e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbod TRACE_SANITIZE (); 390b157617644d1e38f680163889d1dc2e2f64d9ba3Behdad Esfahbod return context->check_struct (this); 391e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbod } 392569da92bc6956f42d9b2d65c784e184fb6380efeBehdad Esfahbod private: 393569da92bc6956f42d9b2d65c784e184fb6380efeBehdad Esfahbod BEInt<Type, sizeof (Type)> v; 394569da92bc6956f42d9b2d65c784e184fb6380efeBehdad Esfahbod public: 395e45d3f86f9a5f3d29ca35a282de7f98e702878f9Behdad Esfahbod DEFINE_SIZE_STATIC (sizeof (Type)); 396e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbod}; 397e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbod 398e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbodtypedef IntType<uint16_t> USHORT; /* 16-bit unsigned integer. */ 399e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbodtypedef IntType<int16_t> SHORT; /* 16-bit signed integer. */ 400e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbodtypedef IntType<uint32_t> ULONG; /* 32-bit unsigned integer. */ 401e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbodtypedef IntType<int32_t> LONG; /* 32-bit signed integer. */ 402e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbod 4036b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod/* Array of four uint8s (length = 32 bits) used to identify a script, language 4046b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod * system, feature, or baseline */ 40520cc86b3592db33731de671f008d7d222776be49Behdad Esfahbodstruct Tag : ULONG 40660d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod{ 407befc022affd2386b3f46cd7d11e4262f6c8bce9fBehdad Esfahbod /* What the char* converters return is NOT nul-terminated. Print using "%.4s" */ 4080dfcc13a4668cdd2c2ebdd5f4a7540a51222cf2fBehdad Esfahbod inline operator const char* (void) const { return CharP(this); } 409198facdc55756cb48cdfb8ba7fa50916fac54ec3Behdad Esfahbod inline operator char* (void) { return CharP(this); } 410b3651231bf80bb7009214547a75ed90e21815c68Behdad Esfahbod public: 411b3651231bf80bb7009214547a75ed90e21815c68Behdad Esfahbod DEFINE_SIZE_STATIC (4); 4126b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod}; 41365f46b00333e20ab8a52a4b350747507541ec1dbBehdad EsfahbodDEFINE_NULL_DATA (Tag, " "); 4146b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod 4156b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod/* Glyph index number, same as uint16 (length = 16 bits) */ 4166ad8d5f3c7028147b371137ae4bca6aae66b3489Behdad Esfahbodtypedef USHORT GlyphID; 4176b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod 4181f437e6f47fb6c15761021bd2078f31778f2179cBehdad Esfahbod/* Offset to a table, same as uint16 (length = 16 bits), Null offset = 0x0000 */ 4196ad8d5f3c7028147b371137ae4bca6aae66b3489Behdad Esfahbodtypedef USHORT Offset; 4206ad8d5f3c7028147b371137ae4bca6aae66b3489Behdad Esfahbod 4216ad8d5f3c7028147b371137ae4bca6aae66b3489Behdad Esfahbod/* LongOffset to a table, same as uint32 (length = 32 bits), Null offset = 0x00000000 */ 4226ad8d5f3c7028147b371137ae4bca6aae66b3489Behdad Esfahbodtypedef ULONG LongOffset; 4236ad8d5f3c7028147b371137ae4bca6aae66b3489Behdad Esfahbod 4246b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod 4256b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod/* CheckSum */ 42660d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbodstruct CheckSum : ULONG 42760d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod{ 42860d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod static uint32_t CalcTableChecksum (ULONG *Table, uint32_t Length) 42960d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod { 4306b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod uint32_t Sum = 0L; 431e45d3f86f9a5f3d29ca35a282de7f98e702878f9Behdad Esfahbod ULONG *EndPtr = Table+((Length+3) & ~3) / ULONG::static_size; 4326b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod 4336b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod while (Table < EndPtr) 4346b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod Sum += *Table++; 4356b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod return Sum; 4366b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod } 437b3651231bf80bb7009214547a75ed90e21815c68Behdad Esfahbod public: 438b3651231bf80bb7009214547a75ed90e21815c68Behdad Esfahbod DEFINE_SIZE_STATIC (4); 4396b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod}; 4406b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod 4416b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod 4426b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod/* 4436b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod * Version Numbers 4446b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod */ 4456b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod 44687fcdcbe3644da10154688765db2d62eb9ac079aBehdad Esfahbodstruct FixedVersion 44760d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod{ 44809c292e3b688a67fbae67b645d1e6ffcf8d8eb6eBehdad Esfahbod inline operator uint32_t (void) const { return (major << 16) + minor; } 44996908b898476ca5d7da5f386b15be76f9e83d76eBehdad Esfahbod 45039840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod inline bool sanitize (hb_sanitize_context_t *context) { 4513e2401f6c53d2b047954d75c37aef5e5e7cdc51aBehdad Esfahbod TRACE_SANITIZE (); 452b157617644d1e38f680163889d1dc2e2f64d9ba3Behdad Esfahbod return context->check_struct (this); 453cd3827ee567612c5500206b62840702fc956e0f5Behdad Esfahbod } 454cd3827ee567612c5500206b62840702fc956e0f5Behdad Esfahbod 4556ad8d5f3c7028147b371137ae4bca6aae66b3489Behdad Esfahbod USHORT major; 45687fcdcbe3644da10154688765db2d62eb9ac079aBehdad Esfahbod USHORT minor; 457b3651231bf80bb7009214547a75ed90e21815c68Behdad Esfahbod public: 458b3651231bf80bb7009214547a75ed90e21815c68Behdad Esfahbod DEFINE_SIZE_STATIC (4); 4596b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod}; 4606b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod 46192b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod 46292b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod 4635f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod/* 46492b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod * Template subclasses of Offset and LongOffset that do the dereferencing. 465f0abcd69408a3af65207cdf8847575ade4579bd4Behdad Esfahbod * Use: (base+offset) 4665f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod */ 4675f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod 46892b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodtemplate <typename OffsetType, typename Type> 46992b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodstruct GenericOffsetTo : OffsetType 47092b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod{ 47100e23fcc6fd0eee5c582251bf3de6a2703fbbd3eBehdad Esfahbod inline const Type& operator () (const void *base) const 47292b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod { 47392b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod unsigned int offset = *this; 47464d3fc8d0dada673245cc8c0b1c12cd849b30997Behdad Esfahbod if (unlikely (!offset)) return Null(Type); 47509766b1ec5ec55a61edbcd7a89ed3613cc92d4cbBehdad Esfahbod return StructAtOffset<Type> (base, offset); 47692b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod } 47792b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod 47839840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod inline bool sanitize (hb_sanitize_context_t *context, void *base) { 4793e2401f6c53d2b047954d75c37aef5e5e7cdc51aBehdad Esfahbod TRACE_SANITIZE (); 480b157617644d1e38f680163889d1dc2e2f64d9ba3Behdad Esfahbod if (!context->check_struct (this)) return false; 48192b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod unsigned int offset = *this; 48264d3fc8d0dada673245cc8c0b1c12cd849b30997Behdad Esfahbod if (unlikely (!offset)) return true; 48309766b1ec5ec55a61edbcd7a89ed3613cc92d4cbBehdad Esfahbod Type &obj = StructAtOffset<Type> (base, offset); 48439840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod return likely (obj.sanitize (context)) || neuter (context); 48592b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod } 4864a446ac35136eff23d55f47bdd7b40095ad707abBehdad Esfahbod template <typename T> 48739840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod inline bool sanitize (hb_sanitize_context_t *context, void *base, T user_data) { 4883e2401f6c53d2b047954d75c37aef5e5e7cdc51aBehdad Esfahbod TRACE_SANITIZE (); 489b157617644d1e38f680163889d1dc2e2f64d9ba3Behdad Esfahbod if (!context->check_struct (this)) return false; 49042b778f89e0818fe06910ce04e2203485823da09Behdad Esfahbod unsigned int offset = *this; 49164d3fc8d0dada673245cc8c0b1c12cd849b30997Behdad Esfahbod if (unlikely (!offset)) return true; 49209766b1ec5ec55a61edbcd7a89ed3613cc92d4cbBehdad Esfahbod Type &obj = StructAtOffset<Type> (base, offset); 49339840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod return likely (obj.sanitize (context, user_data)) || neuter (context); 494c9f14687a30866181feb57ee2736a147ec9f25a1Behdad Esfahbod } 495c9f14687a30866181feb57ee2736a147ec9f25a1Behdad Esfahbod 496c9f14687a30866181feb57ee2736a147ec9f25a1Behdad Esfahbod private: 497c9f14687a30866181feb57ee2736a147ec9f25a1Behdad Esfahbod /* Set the offset to Null */ 49839840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod inline bool neuter (hb_sanitize_context_t *context) { 49940cbefe858192531ed64dd51d402f7ca7b8153a3Behdad Esfahbod if (context->can_edit (this, this->static_size)) { 500c9f14687a30866181feb57ee2736a147ec9f25a1Behdad Esfahbod this->set (0); /* 0 is Null offset */ 501c9f14687a30866181feb57ee2736a147ec9f25a1Behdad Esfahbod return true; 502c9f14687a30866181feb57ee2736a147ec9f25a1Behdad Esfahbod } 503c9f14687a30866181feb57ee2736a147ec9f25a1Behdad Esfahbod return false; 50442b778f89e0818fe06910ce04e2203485823da09Behdad Esfahbod } 50592b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod}; 50692b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodtemplate <typename Base, typename OffsetType, typename Type> 50792b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodinline const Type& operator + (const Base &base, GenericOffsetTo<OffsetType, Type> offset) { return offset (base); } 50892b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod 5095f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbodtemplate <typename Type> 51092b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodstruct OffsetTo : GenericOffsetTo<Offset, Type> {}; 51192b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod 51292b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodtemplate <typename Type> 51392b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodstruct LongOffsetTo : GenericOffsetTo<LongOffset, Type> {}; 514bff3c0fde5da04a70d1f7aeeb9fa2a75fe5c07f6Behdad Esfahbod 515bff3c0fde5da04a70d1f7aeeb9fa2a75fe5c07f6Behdad Esfahbod 51692b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod/* 51792b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod * Array Types 51892b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod */ 51992b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod 52092b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodtemplate <typename LenType, typename Type> 52192b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodstruct GenericArrayOf 52260d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod{ 5232cb08458f674301cde9d962c13911035a251f7c5Behdad Esfahbod const Type *array(void) const { return &StructAfter<Type> (len); } 5242e2f43edf2f49f4047e28b1ce2ea95938536de9cBehdad Esfahbod Type *array(void) { return &StructAfter<Type> (len); } 525d3480ba37fbb5d4be75b094060f5b2f1ce98fb53Behdad Esfahbod 5264f5f1c34dda1e0629bfa6d7b0ffa2e1ce003b7c7Behdad Esfahbod const Type *sub_array (unsigned int start_offset, unsigned int *pcount /* IN/OUT */) const 52748de3730cdf91b9f6473509e22260a902ccec992Behdad Esfahbod { 52848de3730cdf91b9f6473509e22260a902ccec992Behdad Esfahbod unsigned int count = len; 52964d3fc8d0dada673245cc8c0b1c12cd849b30997Behdad Esfahbod if (unlikely (start_offset > count)) 53048de3730cdf91b9f6473509e22260a902ccec992Behdad Esfahbod count = 0; 53148de3730cdf91b9f6473509e22260a902ccec992Behdad Esfahbod else 53248de3730cdf91b9f6473509e22260a902ccec992Behdad Esfahbod count -= start_offset; 53348de3730cdf91b9f6473509e22260a902ccec992Behdad Esfahbod count = MIN (count, *pcount); 53448de3730cdf91b9f6473509e22260a902ccec992Behdad Esfahbod *pcount = count; 5352cb08458f674301cde9d962c13911035a251f7c5Behdad Esfahbod return array() + start_offset; 53648de3730cdf91b9f6473509e22260a902ccec992Behdad Esfahbod } 53748de3730cdf91b9f6473509e22260a902ccec992Behdad Esfahbod 53860d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod inline const Type& operator [] (unsigned int i) const 53960d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod { 54064d3fc8d0dada673245cc8c0b1c12cd849b30997Behdad Esfahbod if (unlikely (i >= len)) return Null(Type); 5412cb08458f674301cde9d962c13911035a251f7c5Behdad Esfahbod return array()[i]; 5425f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod } 54360d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod inline unsigned int get_size () const 544e45d3f86f9a5f3d29ca35a282de7f98e702878f9Behdad Esfahbod { return len.static_size + len * Type::static_size; } 545e8cbaaf6d538036ff9b880b018db402e0895ed01Behdad Esfahbod 54639840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod inline bool sanitize (hb_sanitize_context_t *context) { 5473e2401f6c53d2b047954d75c37aef5e5e7cdc51aBehdad Esfahbod TRACE_SANITIZE (); 54839840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod if (!likely (sanitize_shallow (context))) return false; 54940d73bc68dd828cf68f90fde0f9499a6ce9fbb19Behdad Esfahbod /* Note: for structs that do not reference other structs, 55040d73bc68dd828cf68f90fde0f9499a6ce9fbb19Behdad Esfahbod * we do not need to call their sanitize() as we already did 55140d73bc68dd828cf68f90fde0f9499a6ce9fbb19Behdad Esfahbod * a bound check on the aggregate array size, hence the return. 55240d73bc68dd828cf68f90fde0f9499a6ce9fbb19Behdad Esfahbod */ 5533564ee5216004d45d30b0ded61184cf8dde5dd89Behdad Esfahbod return true; 55440d73bc68dd828cf68f90fde0f9499a6ce9fbb19Behdad Esfahbod /* We do keep this code though to make sure the structs pointed 55540d73bc68dd828cf68f90fde0f9499a6ce9fbb19Behdad Esfahbod * to do have a simple sanitize(), ie. they do not reference 55640d73bc68dd828cf68f90fde0f9499a6ce9fbb19Behdad Esfahbod * other structs. */ 55770de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod unsigned int count = len; 55870de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod for (unsigned int i = 0; i < count; i++) 5594f252fedc7136c66a9d7fbcb2978581986da6227Behdad Esfahbod if (array()[i].sanitize (context)) 56070de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod return false; 5619bd629ccd064e739789e504c41ad875eed93abbaBehdad Esfahbod return true; 56270de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod } 56339840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod inline bool sanitize (hb_sanitize_context_t *context, void *base) { 5643e2401f6c53d2b047954d75c37aef5e5e7cdc51aBehdad Esfahbod TRACE_SANITIZE (); 56539840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod if (!likely (sanitize_shallow (context))) return false; 566e6ab2c59ba2d37942ac5fcbfe61d38b7e359ac8cBehdad Esfahbod unsigned int count = len; 567e6ab2c59ba2d37942ac5fcbfe61d38b7e359ac8cBehdad Esfahbod for (unsigned int i = 0; i < count; i++) 56839840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod if (!array()[i].sanitize (context, base)) 569e6ab2c59ba2d37942ac5fcbfe61d38b7e359ac8cBehdad Esfahbod return false; 5709bd629ccd064e739789e504c41ad875eed93abbaBehdad Esfahbod return true; 571e6ab2c59ba2d37942ac5fcbfe61d38b7e359ac8cBehdad Esfahbod } 5724a446ac35136eff23d55f47bdd7b40095ad707abBehdad Esfahbod template <typename T> 57339840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod inline bool sanitize (hb_sanitize_context_t *context, void *base, T user_data) { 5743e2401f6c53d2b047954d75c37aef5e5e7cdc51aBehdad Esfahbod TRACE_SANITIZE (); 57539840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod if (!likely (sanitize_shallow (context))) return false; 57642b778f89e0818fe06910ce04e2203485823da09Behdad Esfahbod unsigned int count = len; 57742b778f89e0818fe06910ce04e2203485823da09Behdad Esfahbod for (unsigned int i = 0; i < count; i++) 57839840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod if (!array()[i].sanitize (context, base, user_data)) 57942b778f89e0818fe06910ce04e2203485823da09Behdad Esfahbod return false; 5809bd629ccd064e739789e504c41ad875eed93abbaBehdad Esfahbod return true; 58142b778f89e0818fe06910ce04e2203485823da09Behdad Esfahbod } 58270de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod 58330fa2821c277df99a14089749313dfe2b541e2d0Behdad Esfahbod private: 58439840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod inline bool sanitize_shallow (hb_sanitize_context_t *context) { 58530fa2821c277df99a14089749313dfe2b541e2d0Behdad Esfahbod TRACE_SANITIZE (); 586b157617644d1e38f680163889d1dc2e2f64d9ba3Behdad Esfahbod return context->check_struct (this) 587e45d3f86f9a5f3d29ca35a282de7f98e702878f9Behdad Esfahbod && context->check_array (this, Type::static_size, len); 58830fa2821c277df99a14089749313dfe2b541e2d0Behdad Esfahbod } 58930fa2821c277df99a14089749313dfe2b541e2d0Behdad Esfahbod 59030fa2821c277df99a14089749313dfe2b541e2d0Behdad Esfahbod public: 59192b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod LenType len; 592bea34c7cbb583cf7660776e95cab3171590b8427Behdad Esfahbod private: 593bea34c7cbb583cf7660776e95cab3171590b8427Behdad Esfahbod Type arrayX[VAR]; 594b3651231bf80bb7009214547a75ed90e21815c68Behdad Esfahbod public: 595bea34c7cbb583cf7660776e95cab3171590b8427Behdad Esfahbod DEFINE_SIZE_VAR (sizeof (LenType), Type); 596e8cbaaf6d538036ff9b880b018db402e0895ed01Behdad Esfahbod}; 597e8cbaaf6d538036ff9b880b018db402e0895ed01Behdad Esfahbod 59892b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod/* An array with a USHORT number of elements. */ 59992b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodtemplate <typename Type> 60092b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodstruct ArrayOf : GenericArrayOf<USHORT, Type> {}; 60192b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod 60292b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod/* An array with a ULONG number of elements. */ 60392b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodtemplate <typename Type> 60492b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodstruct LongArrayOf : GenericArrayOf<ULONG, Type> {}; 60592b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod 60692b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod/* Array of Offset's */ 60792b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodtemplate <typename Type> 60892b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodstruct OffsetArrayOf : ArrayOf<OffsetTo<Type> > {}; 60992b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod 61092b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod/* Array of LongOffset's */ 61192b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodtemplate <typename Type> 61292b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodstruct LongOffsetArrayOf : ArrayOf<LongOffsetTo<Type> > {}; 61392b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod 61492b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod/* LongArray of LongOffset's */ 61592b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodtemplate <typename Type> 61692b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbodstruct LongOffsetLongArrayOf : LongArrayOf<LongOffsetTo<Type> > {}; 61792b5dd8e71e1bdeaa6e86a53f167683a3f5f4289Behdad Esfahbod 61880e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod/* Array of offsets relative to the beginning of the array itself. */ 61980e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbodtemplate <typename Type> 62080e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbodstruct OffsetListOf : OffsetArrayOf<Type> 62180e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod{ 62280e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod inline const Type& operator [] (unsigned int i) const 62380e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod { 62464d3fc8d0dada673245cc8c0b1c12cd849b30997Behdad Esfahbod if (unlikely (i >= this->len)) return Null(Type); 6252cb08458f674301cde9d962c13911035a251f7c5Behdad Esfahbod return this+this->array()[i]; 62680e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod } 62780e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod 62839840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod inline bool sanitize (hb_sanitize_context_t *context) { 6293e2401f6c53d2b047954d75c37aef5e5e7cdc51aBehdad Esfahbod TRACE_SANITIZE (); 63040cbefe858192531ed64dd51d402f7ca7b8153a3Behdad Esfahbod return OffsetArrayOf<Type>::sanitize (context, this); 63180e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod } 6324a446ac35136eff23d55f47bdd7b40095ad707abBehdad Esfahbod template <typename T> 63339840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod inline bool sanitize (hb_sanitize_context_t *context, T user_data) { 6343e2401f6c53d2b047954d75c37aef5e5e7cdc51aBehdad Esfahbod TRACE_SANITIZE (); 63540cbefe858192531ed64dd51d402f7ca7b8153a3Behdad Esfahbod return OffsetArrayOf<Type>::sanitize (context, this, user_data); 63680e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod } 63780e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod}; 63880e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod 63980e2aa2e1bfa2c8ecedcfa4cce8cadeb15792ac3Behdad Esfahbod 640e8cbaaf6d538036ff9b880b018db402e0895ed01Behdad Esfahbod/* An array with a USHORT number of elements, 641e8cbaaf6d538036ff9b880b018db402e0895ed01Behdad Esfahbod * starting at second element. */ 642e8cbaaf6d538036ff9b880b018db402e0895ed01Behdad Esfahbodtemplate <typename Type> 64360d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbodstruct HeadlessArrayOf 64460d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod{ 6452cb08458f674301cde9d962c13911035a251f7c5Behdad Esfahbod const Type *array(void) const { return &StructAfter<Type> (len); } 6462e2f43edf2f49f4047e28b1ce2ea95938536de9cBehdad Esfahbod Type *array(void) { return &StructAfter<Type> (len); } 647d3480ba37fbb5d4be75b094060f5b2f1ce98fb53Behdad Esfahbod 64860d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod inline const Type& operator [] (unsigned int i) const 64960d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod { 65064d3fc8d0dada673245cc8c0b1c12cd849b30997Behdad Esfahbod if (unlikely (i >= len || !i)) return Null(Type); 6512cb08458f674301cde9d962c13911035a251f7c5Behdad Esfahbod return array()[i-1]; 652e8cbaaf6d538036ff9b880b018db402e0895ed01Behdad Esfahbod } 65360d77cf05fddc5304b4b1fc19cdedba15cbee1e9Behdad Esfahbod inline unsigned int get_size () const 654e45d3f86f9a5f3d29ca35a282de7f98e702878f9Behdad Esfahbod { return len.static_size + (len ? len - 1 : 0) * Type::static_size; } 6555f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod 65639840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod inline bool sanitize_shallow (hb_sanitize_context_t *context) { 657b157617644d1e38f680163889d1dc2e2f64d9ba3Behdad Esfahbod return context->check_struct (this) 658e45d3f86f9a5f3d29ca35a282de7f98e702878f9Behdad Esfahbod && context->check_array (this, Type::static_size, len); 659e5546a4352c54311ac4a9ef138b187378155ebe1Behdad Esfahbod } 660e5546a4352c54311ac4a9ef138b187378155ebe1Behdad Esfahbod 66139840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod inline bool sanitize (hb_sanitize_context_t *context) { 6623e2401f6c53d2b047954d75c37aef5e5e7cdc51aBehdad Esfahbod TRACE_SANITIZE (); 66339840474afd2cda9ff576c08aff9c87095496c27Behdad Esfahbod if (!likely (sanitize_shallow (context))) return false; 66440d73bc68dd828cf68f90fde0f9499a6ce9fbb19Behdad Esfahbod /* Note: for structs that do not reference other structs, 66540d73bc68dd828cf68f90fde0f9499a6ce9fbb19Behdad Esfahbod * we do not need to call their sanitize() as we already did 66640d73bc68dd828cf68f90fde0f9499a6ce9fbb19Behdad Esfahbod * a bound check on the aggregate array size, hence the return. 66740d73bc68dd828cf68f90fde0f9499a6ce9fbb19Behdad Esfahbod */ 6683564ee5216004d45d30b0ded61184cf8dde5dd89Behdad Esfahbod return true; 66940d73bc68dd828cf68f90fde0f9499a6ce9fbb19Behdad Esfahbod /* We do keep this code though to make sure the structs pointed 67040d73bc68dd828cf68f90fde0f9499a6ce9fbb19Behdad Esfahbod * to do have a simple sanitize(), ie. they do not reference 67140d73bc68dd828cf68f90fde0f9499a6ce9fbb19Behdad Esfahbod * other structs. */ 67215164d9258a74122a4db748d35532bd72c47cec2Behdad Esfahbod unsigned int count = len ? len - 1 : 0; 673d3480ba37fbb5d4be75b094060f5b2f1ce98fb53Behdad Esfahbod Type *a = array(); 67470de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod for (unsigned int i = 0; i < count; i++) 6754f252fedc7136c66a9d7fbcb2978581986da6227Behdad Esfahbod if (!a[i].sanitize (context)) 67670de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod return false; 6779bd629ccd064e739789e504c41ad875eed93abbaBehdad Esfahbod return true; 67870de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod } 67970de50c11ed7037b20eb6814ff60f6e32a9944e4Behdad Esfahbod 6805f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod USHORT len; 681d3480ba37fbb5d4be75b094060f5b2f1ce98fb53Behdad Esfahbod/*Type array[VAR];*/ 6825f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod}; 6835f810363acc3ad3cba631a68620e3d37e54c95c4Behdad Esfahbod 6846b4ce01da121e12e1c78ad7eaedf469f35f3568dBehdad Esfahbod 6851e91434569a9e9535ef021ca52b60b2e2af75d19Behdad Esfahbod#endif /* HB_OPEN_TYPE_PRIVATE_HH */ 686