/src/harfbuzz/src/hb-cff-interp-dict-common.hh

Source (jump to first uncovered line)
/*
 * Copyright © 2018 Adobe Inc.
 *
 *  This is part of HarfBuzz, a text shaping library.
 *
 * Permission is hereby granted, without written agreement and without
 * license or royalty fees, to use, copy, modify, and distribute this
 * software and its documentation for any purpose, provided that the
 * above copyright notice and the following two paragraphs appear in
 * all copies of this software.
 *
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 *
 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
 *
 * Adobe Author(s): Michiharu Ariza
 */
#ifndef HB_CFF_INTERP_DICT_COMMON_HH
#define HB_CFF_INTERP_DICT_COMMON_HH

#include "hb-cff-interp-common.hh"

namespace CFF {

using namespace OT;

/* an opstr and the parsed out dict value(s) */
struct dict_val_t : op_str_t
{
  void init () {}
  void fini () {}
};

typedef dict_val_t num_dict_val_t;

template <typename VAL> struct dict_values_t : parsed_values_t<VAL> {};

template <typename OPSTR=op_str_t>
struct top_dict_values_t : dict_values_t<OPSTR>
{
  void init ()
  {
    dict_values_t<OPSTR>::init ();
    charStringsOffset = 0;
    FDArrayOffset = 0;
  }
  void fini () { dict_values_t<OPSTR>::fini (); }

  unsigned int  charStringsOffset;
  unsigned int  FDArrayOffset;
};

struct dict_opset_t : opset_t<number_t>
{
  static void process_op (op_code_t op, interp_env_t<number_t>& env)
  {
    switch (op) {
      case OpCode_longintdict:  /* 5-byte integer */
  env.argStack.push_longint_from_substr (env.str_ref);
  break;

      case OpCode_BCD:  /* real number */
  env.argStack.push_real (parse_bcd (env.str_ref));
  break;

      default:
  opset_t<number_t>::process_op (op, env);
  break;
    }
  }

  /* Turns CFF's BCD format into strtod understandable string */
  static double parse_bcd (byte_str_ref_t& str_ref)
  {
    if (unlikely (str_ref.in_error ())) return .0;

    enum Nibble { DECIMAL=10, EXP_POS, EXP_NEG, RESERVED, NEG, END };

    char buf[32];
    unsigned char byte = 0;
    for (unsigned i = 0, count = 0; count < ARRAY_LENGTH (buf); ++i, ++count)
    {
      unsigned nibble;
      if (!(i & 1))
      {
  if (unlikely (!str_ref.avail ())) break;

  byte = str_ref[0];
  str_ref.inc ();
  nibble = byte >> 4;
      }
      else
  nibble = byte & 0x0F;

      if (unlikely (nibble == RESERVED)) break;
      else if (nibble == END)
      {
  const char *p = buf;
  double pv;
  if (unlikely (!hb_parse_double (&p, p + count, &pv, true/* whole buffer */)))
    break;
  return pv;
      }
      else
      {
  buf[count] = "0123456789.EE?-?"[nibble];
  if (nibble == EXP_NEG)
  {
    ++count;
    if (unlikely (count == ARRAY_LENGTH (buf))) break;
    buf[count] = '-';
  }
      }
    }

    str_ref.set_error ();
    return .0;
  }

  static bool is_hint_op (op_code_t op)
  {
    switch (op)
    {
      case OpCode_BlueValues:
      case OpCode_OtherBlues:
      case OpCode_FamilyBlues:
      case OpCode_FamilyOtherBlues:
      case OpCode_StemSnapH:
      case OpCode_StemSnapV:
      case OpCode_StdHW:
      case OpCode_StdVW:
      case OpCode_BlueScale:
      case OpCode_BlueShift:
      case OpCode_BlueFuzz:
      case OpCode_ForceBold:
      case OpCode_LanguageGroup:
      case OpCode_ExpansionFactor:
  return true;
      default:
  return false;
    }
  }
};

template <typename VAL=op_str_t>
struct top_dict_opset_t : dict_opset_t
{
  static void process_op (op_code_t op, interp_env_t<number_t>& env, top_dict_values_t<VAL> & dictval)
  {
    switch (op) {
      case OpCode_CharStrings:
  dictval.charStringsOffset = env.argStack.pop_uint ();
  env.clear_args ();
  break;
      case OpCode_FDArray:
  dictval.FDArrayOffset = env.argStack.pop_uint ();
  env.clear_args ();
  break;
      case OpCode_FontMatrix:
  env.clear_args ();
  break;
      default:
  dict_opset_t::process_op (op, env);
  break;
    }
  }
};

template <typename OPSET, typename PARAM, typename ENV=num_interp_env_t>
struct dict_interpreter_t : interpreter_t<ENV>
{
  dict_interpreter_t (ENV& env_) : interpreter_t<ENV> (env_) {}

  bool interpret (PARAM& param)
  {
    param.init ();
    while (SUPER::env.str_ref.avail ())
    {
      OPSET::process_op (SUPER::env.fetch_op (), SUPER::env, param);
      if (unlikely (SUPER::env.in_error ()))
  return false;
    }

    return true;
  }

  private:
  typedef interpreter_t<ENV> SUPER;
};

} /* namespace CFF */

#endif /* HB_CFF_INTERP_DICT_COMMON_HH */

Coverage Report

Created: 2023-06-07 06:14

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright © 2018 Adobe Inc.
3		*
4		* This is part of HarfBuzz, a text shaping library.
5		*
6		* Permission is hereby granted, without written agreement and without
7		* license or royalty fees, to use, copy, modify, and distribute this
8		* software and its documentation for any purpose, provided that the
9		* above copyright notice and the following two paragraphs appear in
10		* all copies of this software.
11		*
12		* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
13		* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
14		* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
15		* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
16		* DAMAGE.
17		*
18		* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
19		* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20		* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
21		* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
22		* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
23		*
24		* Adobe Author(s): Michiharu Ariza
25		*/
26		#ifndef HB_CFF_INTERP_DICT_COMMON_HH
27		#define HB_CFF_INTERP_DICT_COMMON_HH
28
29		#include "hb-cff-interp-common.hh"
30
31		namespace CFF {
32
33		using namespace OT;
34
35		/* an opstr and the parsed out dict value(s) */
36		struct dict_val_t : op_str_t
37		{
38	0	void init () {}
39	0	void fini () {}
40		};
41
42		typedef dict_val_t num_dict_val_t;
43
44		template <typename VAL> struct dict_values_t : parsed_values_t<VAL> {};
45
46		template <typename OPSTR=op_str_t>
47		struct top_dict_values_t : dict_values_t<OPSTR>
48		{
49		void init ()
50	0	{
51	0	dict_values_t<OPSTR>::init ();
52	0	charStringsOffset = 0;
53	0	FDArrayOffset = 0;
54	0	} Unexecuted instantiation: CFF::top_dict_values_t<CFF::cff1_top_dict_val_t>::init() Unexecuted instantiation: CFF::top_dict_values_t<CFF::op_str_t>::init()
55	0	void fini () { dict_values_t<OPSTR>::fini (); } Unexecuted instantiation: CFF::top_dict_values_t<CFF::cff1_top_dict_val_t>::fini() Unexecuted instantiation: CFF::top_dict_values_t<CFF::op_str_t>::fini()
56
57		unsigned int charStringsOffset;
58		unsigned int FDArrayOffset;
59		};
60
61		struct dict_opset_t : opset_t<number_t>
62		{
63		static void process_op (op_code_t op, interp_env_t<number_t>& env)
64	0	{
65	0	switch (op) {
66	0	case OpCode_longintdict: /* 5-byte integer */
67	0	env.argStack.push_longint_from_substr (env.str_ref);
68	0	break;
69
70	0	case OpCode_BCD: /* real number */
71	0	env.argStack.push_real (parse_bcd (env.str_ref));
72	0	break;
73
74	0	default:
75	0	opset_t<number_t>::process_op (op, env);
76	0	break;
77	0	}
78	0	}
79
80		/* Turns CFF's BCD format into strtod understandable string */
81		static double parse_bcd (byte_str_ref_t& str_ref)
82	0	{
83	0	if (unlikely (str_ref.in_error ())) return .0;
84
85	0	enum Nibble { DECIMAL=10, EXP_POS, EXP_NEG, RESERVED, NEG, END };
86
87	0	char buf[32];
88	0	unsigned char byte = 0;
89	0	for (unsigned i = 0, count = 0; count < ARRAY_LENGTH (buf); ++i, ++count)
90	0	{
91	0	unsigned nibble;
92	0	if (!(i & 1))
93	0	{
94	0	if (unlikely (!str_ref.avail ())) break;
95
96	0	byte = str_ref[0];
97	0	str_ref.inc ();
98	0	nibble = byte >> 4;
99	0	}
100	0	else
101	0	nibble = byte & 0x0F;
102
103	0	if (unlikely (nibble == RESERVED)) break;
104	0	else if (nibble == END)
105	0	{
106	0	const char *p = buf;
107	0	double pv;
108	0	if (unlikely (!hb_parse_double (&p, p + count, &pv, true/* whole buffer */)))
109	0	break;
110	0	return pv;
111	0	}
112	0	else
113	0	{
114	0	buf[count] = "0123456789.EE?-?"[nibble];
115	0	if (nibble == EXP_NEG)
116	0	{
117	0	++count;
118	0	if (unlikely (count == ARRAY_LENGTH (buf))) break;
119	0	buf[count] = '-';
120	0	}
121	0	}
122	0	}
123
124	0	str_ref.set_error ();
125	0	return .0;
126	0	}
127
128		static bool is_hint_op (op_code_t op)
129	0	{
130	0	switch (op)
131	0	{
132	0	case OpCode_BlueValues:
133	0	case OpCode_OtherBlues:
134	0	case OpCode_FamilyBlues:
135	0	case OpCode_FamilyOtherBlues:
136	0	case OpCode_StemSnapH:
137	0	case OpCode_StemSnapV:
138	0	case OpCode_StdHW:
139	0	case OpCode_StdVW:
140	0	case OpCode_BlueScale:
141	0	case OpCode_BlueShift:
142	0	case OpCode_BlueFuzz:
143	0	case OpCode_ForceBold:
144	0	case OpCode_LanguageGroup:
145	0	case OpCode_ExpansionFactor:
146	0	return true;
147	0	default:
148	0	return false;
149	0	}
150	0	}
151		};
152
153		template <typename VAL=op_str_t>
154		struct top_dict_opset_t : dict_opset_t
155		{
156		static void process_op (op_code_t op, interp_env_t<number_t>& env, top_dict_values_t<VAL> & dictval)
157	0	{
158	0	switch (op) {
159	0	case OpCode_CharStrings:
160	0	dictval.charStringsOffset = env.argStack.pop_uint ();
161	0	env.clear_args ();
162	0	break;
163	0	case OpCode_FDArray:
164	0	dictval.FDArrayOffset = env.argStack.pop_uint ();
165	0	env.clear_args ();
166	0	break;
167	0	case OpCode_FontMatrix:
168	0	env.clear_args ();
169	0	break;
170	0	default:
171	0	dict_opset_t::process_op (op, env);
172	0	break;
173	0	}
174	0	} Unexecuted instantiation: CFF::top_dict_opset_t<CFF::cff1_top_dict_val_t>::process_op(unsigned int, CFF::interp_env_t<CFF::number_t>&, CFF::top_dict_values_t<CFF::cff1_top_dict_val_t>&) Unexecuted instantiation: CFF::top_dict_opset_t<CFF::op_str_t>::process_op(unsigned int, CFF::interp_env_t<CFF::number_t>&, CFF::top_dict_values_t<CFF::op_str_t>&)
175		};
176
177		template <typename OPSET, typename PARAM, typename ENV=num_interp_env_t>
178		struct dict_interpreter_t : interpreter_t<ENV>
179		{
180	0	dict_interpreter_t (ENV& env_) : interpreter_t<ENV> (env_) {} Unexecuted instantiation: CFF::dict_interpreter_t<CFF::cff1_top_dict_opset_t, CFF::cff1_top_dict_values_t, CFF::cff1_top_dict_interp_env_t>::dict_interpreter_t(CFF::cff1_top_dict_interp_env_t&) Unexecuted instantiation: CFF::dict_interpreter_t<CFF::cff1_font_dict_opset_t, CFF::cff1_font_dict_values_t, CFF::interp_env_t<CFF::number_t> >::dict_interpreter_t(CFF::interp_env_t<CFF::number_t>&) Unexecuted instantiation: CFF::dict_interpreter_t<CFF::cff1_private_dict_opset_t, CFF::cff1_private_dict_values_base_t<CFF::dict_val_t>, CFF::interp_env_t<CFF::number_t> >::dict_interpreter_t(CFF::interp_env_t<CFF::number_t>&) Unexecuted instantiation: CFF::dict_interpreter_t<CFF::cff2_top_dict_opset_t, CFF::cff2_top_dict_values_t, CFF::interp_env_t<CFF::number_t> >::dict_interpreter_t(CFF::interp_env_t<CFF::number_t>&) Unexecuted instantiation: CFF::dict_interpreter_t<CFF::cff2_font_dict_opset_t, CFF::cff2_font_dict_values_t, CFF::interp_env_t<CFF::number_t> >::dict_interpreter_t(CFF::interp_env_t<CFF::number_t>&) Unexecuted instantiation: CFF::dict_interpreter_t<CFF::cff2_private_dict_opset_t, CFF::cff2_private_dict_values_base_t<CFF::dict_val_t>, CFF::cff2_priv_dict_interp_env_t>::dict_interpreter_t(CFF::cff2_priv_dict_interp_env_t&)
181
182		bool interpret (PARAM& param)
183	0	{
184	0	param.init ();
185	0	while (SUPER::env.str_ref.avail ())
186	0	{
187	0	OPSET::process_op (SUPER::env.fetch_op (), SUPER::env, param);
188	0	if (unlikely (SUPER::env.in_error ()))
189	0	return false;
190	0	}
191
192	0	return true;
193	0	} Unexecuted instantiation: CFF::dict_interpreter_t<CFF::cff1_top_dict_opset_t, CFF::cff1_top_dict_values_t, CFF::cff1_top_dict_interp_env_t>::interpret(CFF::cff1_top_dict_values_t&) Unexecuted instantiation: CFF::dict_interpreter_t<CFF::cff1_font_dict_opset_t, CFF::cff1_font_dict_values_t, CFF::interp_env_t<CFF::number_t> >::interpret(CFF::cff1_font_dict_values_t&) Unexecuted instantiation: CFF::dict_interpreter_t<CFF::cff1_private_dict_opset_t, CFF::cff1_private_dict_values_base_t<CFF::dict_val_t>, CFF::interp_env_t<CFF::number_t> >::interpret(CFF::cff1_private_dict_values_base_t<CFF::dict_val_t>&) Unexecuted instantiation: CFF::dict_interpreter_t<CFF::cff2_top_dict_opset_t, CFF::cff2_top_dict_values_t, CFF::interp_env_t<CFF::number_t> >::interpret(CFF::cff2_top_dict_values_t&) Unexecuted instantiation: CFF::dict_interpreter_t<CFF::cff2_font_dict_opset_t, CFF::cff2_font_dict_values_t, CFF::interp_env_t<CFF::number_t> >::interpret(CFF::cff2_font_dict_values_t&) Unexecuted instantiation: CFF::dict_interpreter_t<CFF::cff2_private_dict_opset_t, CFF::cff2_private_dict_values_base_t<CFF::dict_val_t>, CFF::cff2_priv_dict_interp_env_t>::interpret(CFF::cff2_private_dict_values_base_t<CFF::dict_val_t>&)
194
195		private:
196		typedef interpreter_t<ENV> SUPER;
197		};
198
199		} /* namespace CFF */
200
201		#endif /* HB_CFF_INTERP_DICT_COMMON_HH */