diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-open-type-private.hh')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-open-type-private.hh | 178 |
1 files changed, 115 insertions, 63 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-open-type-private.hh b/src/3rdparty/harfbuzz-ng/src/hb-open-type-private.hh index 046df97659..75a0f568d1 100644 --- a/src/3rdparty/harfbuzz-ng/src/hb-open-type-private.hh +++ b/src/3rdparty/harfbuzz-ng/src/hb-open-type-private.hh @@ -179,10 +179,13 @@ struct hb_sanitize_context_t inline const char *get_name (void) { return "SANITIZE"; } static const unsigned int max_debug_depth = HB_DEBUG_SANITIZE; typedef bool return_t; + template <typename T, typename F> + inline bool may_dispatch (const T *obj, const F *format) + { return format->sanitize (this); } template <typename T> inline return_t dispatch (const T &obj) { return obj.sanitize (this); } static return_t default_return_value (void) { return true; } - bool stop_sublookup_iteration (const return_t r HB_UNUSED) const { return false; } + bool stop_sublookup_iteration (const return_t r) const { return !r; } inline void init (hb_blob_t *b) { @@ -194,10 +197,11 @@ struct hb_sanitize_context_t { this->start = hb_blob_get_data (this->blob, NULL); this->end = this->start + hb_blob_get_length (this->blob); + assert (this->start <= this->end); /* Must not overflow. */ this->edit_count = 0; this->debug_depth = 0; - DEBUG_MSG_LEVEL (SANITIZE, this->blob, 0, +1, + DEBUG_MSG_LEVEL (SANITIZE, start, 0, +1, "start [%p..%p] (%lu bytes)", this->start, this->end, (unsigned long) (this->end - this->start)); @@ -205,7 +209,7 @@ struct hb_sanitize_context_t inline void end_processing (void) { - DEBUG_MSG_LEVEL (SANITIZE, this->blob, 0, -1, + DEBUG_MSG_LEVEL (SANITIZE, this->start, 0, -1, "end [%p..%p] %u edit requests", this->start, this->end, this->edit_count); @@ -217,28 +221,31 @@ struct hb_sanitize_context_t inline bool check_range (const void *base, unsigned int len) const { const char *p = (const char *) base; + bool ok = this->start <= p && p <= this->end && (unsigned int) (this->end - p) >= len; - hb_auto_trace_t<HB_DEBUG_SANITIZE, bool> trace - (&this->debug_depth, "SANITIZE", this->blob, NULL, - "check_range [%p..%p] (%d bytes) in [%p..%p]", + DEBUG_MSG_LEVEL (SANITIZE, p, this->debug_depth+1, 0, + "check_range [%p..%p] (%d bytes) in [%p..%p] -> %s", p, p + len, len, - this->start, this->end); + this->start, this->end, + ok ? "OK" : "OUT-OF-RANGE"); - return TRACE_RETURN (likely (this->start <= p && p <= this->end && (unsigned int) (this->end - p) >= len)); + return likely (ok); } inline bool check_array (const void *base, unsigned int record_size, unsigned int len) const { const char *p = (const char *) base; bool overflows = _hb_unsigned_int_mul_overflows (len, record_size); + unsigned int array_size = record_size * len; + bool ok = !overflows && this->check_range (base, array_size); - hb_auto_trace_t<HB_DEBUG_SANITIZE, bool> trace - (&this->debug_depth, "SANITIZE", this->blob, NULL, - "check_array [%p..%p] (%d*%d=%ld bytes) in [%p..%p]", - p, p + (record_size * len), record_size, len, (unsigned long) record_size * len, - this->start, this->end); + DEBUG_MSG_LEVEL (SANITIZE, p, this->debug_depth+1, 0, + "check_array [%p..%p] (%d*%d=%d bytes) in [%p..%p] -> %s", + p, p + (record_size * len), record_size, len, (unsigned int) array_size, + this->start, this->end, + overflows ? "OVERFLOWS" : ok ? "OK" : "OUT-OF-RANGE"); - return TRACE_RETURN (likely (!overflows && this->check_range (base, record_size * len))); + return likely (ok); } template <typename Type> @@ -255,21 +262,20 @@ struct hb_sanitize_context_t const char *p = (const char *) base; this->edit_count++; - hb_auto_trace_t<HB_DEBUG_SANITIZE, bool> trace - (&this->debug_depth, "SANITIZE", this->blob, NULL, + DEBUG_MSG_LEVEL (SANITIZE, p, this->debug_depth+1, 0, "may_edit(%u) [%p..%p] (%d bytes) in [%p..%p] -> %s", this->edit_count, p, p + len, len, this->start, this->end, this->writable ? "GRANTED" : "DENIED"); - return TRACE_RETURN (this->writable); + return this->writable; } template <typename Type, typename ValueType> - inline bool try_set (Type *obj, const ValueType &v) { + inline bool try_set (const Type *obj, const ValueType &v) { if (this->may_edit (obj, obj->static_size)) { - obj->set (v); + const_cast<Type *> (obj)->set (v); return true; } return false; @@ -289,7 +295,7 @@ template <typename Type> struct Sanitizer { static hb_blob_t *sanitize (hb_blob_t *blob) { - hb_sanitize_context_t c[1] = {{0}}; + hb_sanitize_context_t c[1] = {{0, NULL, NULL, false, 0, NULL}}; bool sane; /* TODO is_sane() stuff */ @@ -297,7 +303,7 @@ struct Sanitizer c->init (blob); retry: - DEBUG_MSG_FUNC (SANITIZE, blob, "start"); + DEBUG_MSG_FUNC (SANITIZE, c->start, "start"); c->start_processing (); @@ -311,13 +317,13 @@ struct Sanitizer sane = t->sanitize (c); if (sane) { if (c->edit_count) { - DEBUG_MSG_FUNC (SANITIZE, blob, "passed first round with %d edits; going for second round", c->edit_count); + DEBUG_MSG_FUNC (SANITIZE, c->start, "passed first round with %d edits; going for second round", c->edit_count); /* sanitize again to ensure no toe-stepping */ c->edit_count = 0; sane = t->sanitize (c); if (c->edit_count) { - DEBUG_MSG_FUNC (SANITIZE, blob, "requested %d edits in second round; FAILLING", c->edit_count); + DEBUG_MSG_FUNC (SANITIZE, c->start, "requested %d edits in second round; FAILLING", c->edit_count); sane = false; } } @@ -330,7 +336,7 @@ struct Sanitizer if (c->start) { c->writable = true; /* ok, we made it writable by relocating. try again */ - DEBUG_MSG_FUNC (SANITIZE, blob, "retry"); + DEBUG_MSG_FUNC (SANITIZE, c->start, "retry"); goto retry; } } @@ -338,7 +344,7 @@ struct Sanitizer c->end_processing (); - DEBUG_MSG_FUNC (SANITIZE, blob, sane ? "PASSED" : "FAILED"); + DEBUG_MSG_FUNC (SANITIZE, c->start, sane ? "PASSED" : "FAILED"); if (sane) return blob; else { @@ -533,31 +539,55 @@ template <typename Type> struct BEInt<Type, 2> { public: - inline void set (Type i) { hb_be_uint16_put (v,i); } - inline operator Type (void) const { return hb_be_uint16_get (v); } - inline bool operator == (const BEInt<Type, 2>& o) const { return hb_be_uint16_eq (v, o.v); } - inline bool operator != (const BEInt<Type, 2>& o) const { return !(*this == o); } + inline void set (Type V) + { + v[0] = (V >> 8) & 0xFF; + v[1] = (V ) & 0xFF; + } + inline operator Type (void) const + { + return (v[0] << 8) + + (v[1] ); + } private: uint8_t v[2]; }; template <typename Type> -struct BEInt<Type, 4> +struct BEInt<Type, 3> { public: - inline void set (Type i) { hb_be_uint32_put (v,i); } - inline operator Type (void) const { return hb_be_uint32_get (v); } - inline bool operator == (const BEInt<Type, 4>& o) const { return hb_be_uint32_eq (v, o.v); } - inline bool operator != (const BEInt<Type, 4>& o) const { return !(*this == o); } - private: uint8_t v[4]; + inline void set (Type V) + { + v[0] = (V >> 16) & 0xFF; + v[1] = (V >> 8) & 0xFF; + v[2] = (V ) & 0xFF; + } + inline operator Type (void) const + { + return (v[0] << 16) + + (v[1] << 8) + + (v[2] ); + } + private: uint8_t v[3]; }; template <typename Type> -struct BEInt<Type, 3> +struct BEInt<Type, 4> { public: - inline void set (Type i) { hb_be_uint24_put (v,i); } - inline operator Type (void) const { return hb_be_uint24_get (v); } - inline bool operator == (const BEInt<Type, 3>& o) const { return hb_be_uint24_eq (v, o.v); } - inline bool operator != (const BEInt<Type, 3>& o) const { return !(*this == o); } - private: uint8_t v[3]; + inline void set (Type V) + { + v[0] = (V >> 24) & 0xFF; + v[1] = (V >> 16) & 0xFF; + v[2] = (V >> 8) & 0xFF; + v[3] = (V ) & 0xFF; + } + inline operator Type (void) const + { + return (v[0] << 24) + + (v[1] << 16) + + (v[2] << 8) + + (v[3] ); + } + private: uint8_t v[4]; }; /* Integer types in big-endian order and no alignment requirement */ @@ -566,12 +596,19 @@ struct IntType { inline void set (Type i) { v.set (i); } inline operator Type(void) const { return v; } - inline bool operator == (const IntType<Type,Size> &o) const { return v == o.v; } - inline bool operator != (const IntType<Type,Size> &o) const { return v != o.v; } + inline bool operator == (const IntType<Type,Size> &o) const { return (Type) v == (Type) o.v; } + inline bool operator != (const IntType<Type,Size> &o) const { return !(*this == o); } static inline int cmp (const IntType<Type,Size> *a, const IntType<Type,Size> *b) { return b->cmp (*a); } - inline int cmp (IntType<Type,Size> va) const { Type a = va; Type b = v; return a < b ? -1 : a == b ? 0 : +1; } - inline int cmp (Type a) const { Type b = v; return a < b ? -1 : a == b ? 0 : +1; } - inline bool sanitize (hb_sanitize_context_t *c) { + inline int cmp (Type a) const + { + Type b = v; + if (sizeof (Type) < sizeof (int)) + return (int) a - (int) b; + else + return a < b ? -1 : a == b ? 0 : +1; + } + inline bool sanitize (hb_sanitize_context_t *c) const + { TRACE_SANITIZE (this); return TRACE_RETURN (likely (c->check_struct (this))); } @@ -598,7 +635,8 @@ typedef USHORT UFWORD; * 1904. The value is represented as a signed 64-bit integer. */ struct LONGDATETIME { - inline bool sanitize (hb_sanitize_context_t *c) { + inline bool sanitize (hb_sanitize_context_t *c) const + { TRACE_SANITIZE (this); return TRACE_RETURN (likely (c->check_struct (this))); } @@ -622,7 +660,10 @@ struct Tag : ULONG DEFINE_NULL_DATA (Tag, " "); /* Glyph index number, same as uint16 (length = 16 bits) */ -typedef USHORT GlyphID; +struct GlyphID : USHORT { + static inline int cmp (const GlyphID *a, const GlyphID *b) { return b->USHORT::cmp (*a); } + inline int cmp (hb_codepoint_t a) const { return (int) a - (int) *this; } +}; /* Script/language-system/feature index */ struct Index : USHORT { @@ -671,7 +712,8 @@ struct FixedVersion { inline uint32_t to_int (void) const { return (major << 16) + minor; } - inline bool sanitize (hb_sanitize_context_t *c) { + inline bool sanitize (hb_sanitize_context_t *c) const + { TRACE_SANITIZE (this); return TRACE_RETURN (c->check_struct (this)); } @@ -699,33 +741,35 @@ struct OffsetTo : Offset<OffsetType> return StructAtOffset<Type> (base, offset); } - inline Type& serialize (hb_serialize_context_t *c, void *base) + inline Type& serialize (hb_serialize_context_t *c, const void *base) { Type *t = c->start_embed<Type> (); this->set ((char *) t - (char *) base); /* TODO(serialize) Overflow? */ return *t; } - inline bool sanitize (hb_sanitize_context_t *c, void *base) { + inline bool sanitize (hb_sanitize_context_t *c, const void *base) const + { TRACE_SANITIZE (this); if (unlikely (!c->check_struct (this))) return TRACE_RETURN (false); unsigned int offset = *this; if (unlikely (!offset)) return TRACE_RETURN (true); - Type &obj = StructAtOffset<Type> (base, offset); + const Type &obj = StructAtOffset<Type> (base, offset); return TRACE_RETURN (likely (obj.sanitize (c)) || neuter (c)); } template <typename T> - inline bool sanitize (hb_sanitize_context_t *c, void *base, T user_data) { + inline bool sanitize (hb_sanitize_context_t *c, const void *base, T user_data) const + { TRACE_SANITIZE (this); if (unlikely (!c->check_struct (this))) return TRACE_RETURN (false); unsigned int offset = *this; if (unlikely (!offset)) return TRACE_RETURN (true); - Type &obj = StructAtOffset<Type> (base, offset); + const Type &obj = StructAtOffset<Type> (base, offset); return TRACE_RETURN (likely (obj.sanitize (c, user_data)) || neuter (c)); } /* Set the offset to Null */ - inline bool neuter (hb_sanitize_context_t *c) { + inline bool neuter (hb_sanitize_context_t *c) const { return c->try_set (this, 0); } DEFINE_SIZE_STATIC (sizeof(OffsetType)); @@ -790,7 +834,8 @@ struct ArrayOf return TRACE_RETURN (true); } - inline bool sanitize (hb_sanitize_context_t *c) { + inline bool sanitize (hb_sanitize_context_t *c) const + { TRACE_SANITIZE (this); if (unlikely (!sanitize_shallow (c))) return TRACE_RETURN (false); @@ -805,7 +850,8 @@ struct ArrayOf return TRACE_RETURN (true); } - inline bool sanitize (hb_sanitize_context_t *c, void *base) { + inline bool sanitize (hb_sanitize_context_t *c, const void *base) const + { TRACE_SANITIZE (this); if (unlikely (!sanitize_shallow (c))) return TRACE_RETURN (false); unsigned int count = len; @@ -815,7 +861,8 @@ struct ArrayOf return TRACE_RETURN (true); } template <typename T> - inline bool sanitize (hb_sanitize_context_t *c, void *base, T user_data) { + inline bool sanitize (hb_sanitize_context_t *c, const void *base, T user_data) const + { TRACE_SANITIZE (this); if (unlikely (!sanitize_shallow (c))) return TRACE_RETURN (false); unsigned int count = len; @@ -836,7 +883,8 @@ struct ArrayOf } private: - inline bool sanitize_shallow (hb_sanitize_context_t *c) { + inline bool sanitize_shallow (hb_sanitize_context_t *c) const + { TRACE_SANITIZE (this); return TRACE_RETURN (c->check_struct (this) && c->check_array (this, Type::static_size, len)); } @@ -862,12 +910,14 @@ struct OffsetListOf : OffsetArrayOf<Type> return this+this->array[i]; } - inline bool sanitize (hb_sanitize_context_t *c) { + inline bool sanitize (hb_sanitize_context_t *c) const + { TRACE_SANITIZE (this); return TRACE_RETURN (OffsetArrayOf<Type>::sanitize (c, this)); } template <typename T> - inline bool sanitize (hb_sanitize_context_t *c, T user_data) { + inline bool sanitize (hb_sanitize_context_t *c, T user_data) const + { TRACE_SANITIZE (this); return TRACE_RETURN (OffsetArrayOf<Type>::sanitize (c, this, user_data)); } @@ -901,12 +951,14 @@ struct HeadlessArrayOf return TRACE_RETURN (true); } - inline bool sanitize_shallow (hb_sanitize_context_t *c) { + inline bool sanitize_shallow (hb_sanitize_context_t *c) const + { return c->check_struct (this) && c->check_array (this, Type::static_size, len); } - inline bool sanitize (hb_sanitize_context_t *c) { + inline bool sanitize (hb_sanitize_context_t *c) const + { TRACE_SANITIZE (this); if (unlikely (!sanitize_shallow (c))) return TRACE_RETURN (false); |