Move serializer to hb-serialize.hh
This commit is contained in:
Behdad Esfahbod
parent
bb22462f29
commit
be66b575fc
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@ -128,6 +128,7 @@ HB_BASE_sources = \
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hb-ot-var-mvar-table.hh \
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hb-ot-var.cc \
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hb-ot-vorg-table.hh \
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hb-serialize.hh \
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hb-set-digest.hh \
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hb-set.cc \
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hb-set.hh \
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@ -32,8 +32,7 @@
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#include "hb.hh"
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#include "hb-blob.hh"
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#include "hb-array.hh"
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#include "hb-vector.hh"
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#include "hb-serialize.hh"
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/*
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@ -510,167 +509,6 @@ struct hb_sanitize_with_object_t
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};
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/*
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* Serialize
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*/
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struct hb_serialize_context_t
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{
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hb_serialize_context_t (void *start_, unsigned int size)
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{
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this->start = (char *) start_;
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this->end = this->start + size;
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reset ();
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}
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bool in_error () const { return !this->successful; }
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void reset ()
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{
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this->successful = true;
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this->head = this->start;
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this->debug_depth = 0;
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}
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bool propagate_error (bool e)
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{ return this->successful = this->successful && e; }
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template <typename T> bool propagate_error (const T &obj)
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{ return this->successful = this->successful && !obj.in_error (); }
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template <typename T> bool propagate_error (const T *obj)
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{ return this->successful = this->successful && !obj->in_error (); }
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template <typename T1, typename T2> bool propagate_error (T1 &o1, T2 &o2)
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{ return propagate_error (o1) && propagate_error (o2); }
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template <typename T1, typename T2> bool propagate_error (T1 *o1, T2 *o2)
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{ return propagate_error (o1) && propagate_error (o2); }
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template <typename T1, typename T2, typename T3>
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bool propagate_error (T1 &o1, T2 &o2, T3 &o3)
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{ return propagate_error (o1) && propagate_error (o2, o3); }
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template <typename T1, typename T2, typename T3>
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bool propagate_error (T1 *o1, T2 *o2, T3 *o3)
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{ return propagate_error (o1) && propagate_error (o2, o3); }
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/* To be called around main operation. */
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template <typename Type>
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Type *start_serialize ()
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{
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DEBUG_MSG_LEVEL (SERIALIZE, this->start, 0, +1,
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"start [%p..%p] (%lu bytes)",
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this->start, this->end,
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(unsigned long) (this->end - this->start));
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return start_embed<Type> ();
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}
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void end_serialize ()
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{
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DEBUG_MSG_LEVEL (SERIALIZE, this->start, 0, -1,
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"end [%p..%p] serialized %d bytes; %s",
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this->start, this->end,
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(int) (this->head - this->start),
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this->successful ? "successful" : "UNSUCCESSFUL");
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}
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unsigned int length () const { return this->head - this->start; }
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void align (unsigned int alignment)
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{
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unsigned int l = length () % alignment;
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if (l)
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allocate_size<void> (alignment - l);
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}
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template <typename Type>
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Type *start_embed (const Type *_ HB_UNUSED = nullptr) const
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{
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Type *ret = reinterpret_cast<Type *> (this->head);
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return ret;
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}
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template <typename Type>
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Type *allocate_size (unsigned int size)
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{
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if (unlikely (!this->successful || this->end - this->head < ptrdiff_t (size))) {
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this->successful = false;
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return nullptr;
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}
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memset (this->head, 0, size);
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char *ret = this->head;
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this->head += size;
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return reinterpret_cast<Type *> (ret);
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}
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template <typename Type>
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Type *allocate_min ()
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{
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return this->allocate_size<Type> (Type::min_size);
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}
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template <typename Type>
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Type *embed (const Type &obj)
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{
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unsigned int size = obj.get_size ();
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Type *ret = this->allocate_size<Type> (size);
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if (unlikely (!ret)) return nullptr;
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memcpy (ret, &obj, size);
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return ret;
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}
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template <typename Type>
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hb_serialize_context_t &operator << (const Type &obj) { embed (obj); return *this; }
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template <typename Type>
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Type *extend_size (Type &obj, unsigned int size)
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{
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assert (this->start <= (char *) &obj);
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assert ((char *) &obj <= this->head);
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assert ((char *) &obj + size >= this->head);
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if (unlikely (!this->allocate_size<Type> (((char *) &obj) + size - this->head))) return nullptr;
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return reinterpret_cast<Type *> (&obj);
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}
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template <typename Type>
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Type *extend_min (Type &obj) { return extend_size (obj, obj.min_size); }
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template <typename Type>
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Type *extend (Type &obj) { return extend_size (obj, obj.get_size ()); }
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/* Output routines. */
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template <typename Type>
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Type *copy () const
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{
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assert (this->successful);
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unsigned int len = this->head - this->start;
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void *p = malloc (len);
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if (p)
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memcpy (p, this->start, len);
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return reinterpret_cast<Type *> (p);
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}
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hb_bytes_t copy_bytes () const
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{
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assert (this->successful);
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unsigned int len = this->head - this->start;
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void *p = malloc (len);
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if (p)
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memcpy (p, this->start, len);
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else
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return hb_bytes_t ();
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return hb_bytes_t ((char *) p, len);
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}
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hb_blob_t *copy_blob () const
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{
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assert (this->successful);
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return hb_blob_create (this->start,
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this->head - this->start,
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HB_MEMORY_MODE_DUPLICATE,
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nullptr, nullptr);
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}
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public:
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unsigned int debug_depth;
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char *start, *end, *head;
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bool successful;
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};
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/*
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* Big-endian integers.
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*/
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@ -0,0 +1,196 @@
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/*
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* Copyright © 2007,2008,2009,2010 Red Hat, Inc.
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* Copyright © 2012,2018 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Red Hat Author(s): Behdad Esfahbod
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* Google Author(s): Behdad Esfahbod
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*/
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#ifndef HB_SERIALIZE_HH
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#define HB_SERIALIZE_HH
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#include "hb.hh"
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#include "hb-blob.hh"
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/*
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* Serialize
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*/
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struct hb_serialize_context_t
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{
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hb_serialize_context_t (void *start_, unsigned int size)
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{
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this->start = (char *) start_;
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this->end = this->start + size;
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reset ();
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}
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bool in_error () const { return !this->successful; }
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void reset ()
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{
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this->successful = true;
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this->head = this->start;
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this->debug_depth = 0;
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}
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bool propagate_error (bool e)
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{ return this->successful = this->successful && e; }
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template <typename T> bool propagate_error (const T &obj)
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{ return this->successful = this->successful && !obj.in_error (); }
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template <typename T> bool propagate_error (const T *obj)
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{ return this->successful = this->successful && !obj->in_error (); }
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template <typename T1, typename T2> bool propagate_error (T1 &o1, T2 &o2)
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{ return propagate_error (o1) && propagate_error (o2); }
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template <typename T1, typename T2> bool propagate_error (T1 *o1, T2 *o2)
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{ return propagate_error (o1) && propagate_error (o2); }
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template <typename T1, typename T2, typename T3>
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bool propagate_error (T1 &o1, T2 &o2, T3 &o3)
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{ return propagate_error (o1) && propagate_error (o2, o3); }
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template <typename T1, typename T2, typename T3>
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bool propagate_error (T1 *o1, T2 *o2, T3 *o3)
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{ return propagate_error (o1) && propagate_error (o2, o3); }
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/* To be called around main operation. */
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template <typename Type>
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Type *start_serialize ()
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{
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DEBUG_MSG_LEVEL (SERIALIZE, this->start, 0, +1,
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"start [%p..%p] (%lu bytes)",
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this->start, this->end,
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(unsigned long) (this->end - this->start));
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return start_embed<Type> ();
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}
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void end_serialize ()
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{
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DEBUG_MSG_LEVEL (SERIALIZE, this->start, 0, -1,
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"end [%p..%p] serialized %d bytes; %s",
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this->start, this->end,
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(int) (this->head - this->start),
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this->successful ? "successful" : "UNSUCCESSFUL");
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}
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unsigned int length () const { return this->head - this->start; }
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void align (unsigned int alignment)
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{
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unsigned int l = length () % alignment;
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if (l)
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allocate_size<void> (alignment - l);
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}
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template <typename Type>
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Type *start_embed (const Type *_ HB_UNUSED = nullptr) const
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{
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Type *ret = reinterpret_cast<Type *> (this->head);
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return ret;
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}
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template <typename Type>
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Type *allocate_size (unsigned int size)
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{
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if (unlikely (!this->successful || this->end - this->head < ptrdiff_t (size))) {
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this->successful = false;
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return nullptr;
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}
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memset (this->head, 0, size);
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char *ret = this->head;
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this->head += size;
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return reinterpret_cast<Type *> (ret);
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}
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template <typename Type>
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Type *allocate_min ()
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{
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return this->allocate_size<Type> (Type::min_size);
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}
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template <typename Type>
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Type *embed (const Type &obj)
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{
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unsigned int size = obj.get_size ();
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Type *ret = this->allocate_size<Type> (size);
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if (unlikely (!ret)) return nullptr;
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memcpy (ret, &obj, size);
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return ret;
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}
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template <typename Type>
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hb_serialize_context_t &operator << (const Type &obj) { embed (obj); return *this; }
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template <typename Type>
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Type *extend_size (Type &obj, unsigned int size)
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{
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assert (this->start <= (char *) &obj);
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assert ((char *) &obj <= this->head);
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assert ((char *) &obj + size >= this->head);
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if (unlikely (!this->allocate_size<Type> (((char *) &obj) + size - this->head))) return nullptr;
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return reinterpret_cast<Type *> (&obj);
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}
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template <typename Type>
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Type *extend_min (Type &obj) { return extend_size (obj, obj.min_size); }
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template <typename Type>
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Type *extend (Type &obj) { return extend_size (obj, obj.get_size ()); }
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/* Output routines. */
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template <typename Type>
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Type *copy () const
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{
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assert (this->successful);
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unsigned int len = this->head - this->start;
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void *p = malloc (len);
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if (p)
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memcpy (p, this->start, len);
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return reinterpret_cast<Type *> (p);
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}
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hb_bytes_t copy_bytes () const
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{
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assert (this->successful);
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unsigned int len = this->head - this->start;
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void *p = malloc (len);
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if (p)
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memcpy (p, this->start, len);
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else
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return hb_bytes_t ();
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return hb_bytes_t ((char *) p, len);
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}
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hb_blob_t *copy_blob () const
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{
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assert (this->successful);
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return hb_blob_create (this->start,
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this->head - this->start,
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HB_MEMORY_MODE_DUPLICATE,
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nullptr, nullptr);
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}
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public:
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unsigned int debug_depth;
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char *start, *end, *head;
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bool successful;
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};
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#endif /* HB_SERIALIZE_HH */
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