Bug Summary

File:jdk/src/java.desktop/share/native/libharfbuzz/hb-ot-shape-complex-arabic-fallback.hh
Warning:line 329, column 3
Argument to free() is the address of the global variable '_hb_NullPool', which is not memory allocated by malloc()

Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name hb-ot-shape-complex-arabic.cc -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -mthread-model posix -fno-delete-null-pointer-checks -mframe-pointer=all -fmath-errno -fno-rounding-math -masm-verbose -mconstructor-aliases -munwind-tables -target-cpu x86-64 -dwarf-column-info -fno-split-dwarf-inlining -debugger-tuning=gdb -resource-dir /usr/lib/llvm-10/lib/clang/10.0.0 -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/support/modules_include/java.base -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/support/modules_include/java.base/linux -I /home/daniel/Projects/java/jdk/src/java.base/share/native/libjava -I /home/daniel/Projects/java/jdk/src/java.base/unix/native/libjava -I /home/daniel/Projects/java/jdk/src/hotspot/share/include -I /home/daniel/Projects/java/jdk/src/hotspot/os/posix/include -D LIBC=gnu -D _GNU_SOURCE -D _REENTRANT -D _LARGEFILE64_SOURCE -D LINUX -D DEBUG -D _LITTLE_ENDIAN -D ARCH="amd64" -D amd64 -D _LP64=1 -D GETPAGESIZE -D HAVE_MPROTECT -D HAVE_PTHREAD -D HAVE_SYSCONF -D HAVE_SYS_MMAN_H -D HAVE_UNISTD_H -D HB_NO_PRAGMA_GCC_DIAGNOSTIC -D HAVE_INTEL_ATOMIC_PRIMITIVES -I /usr/include/freetype2 -D LE_STANDALONE -D HEADLESS -I /home/daniel/Projects/java/jdk/src/java.desktop/unix/native/libfontmanager -I /home/daniel/Projects/java/jdk/src/java.desktop/share/native/libfontmanager -I /home/daniel/Projects/java/jdk/src/java.desktop/share/native/libharfbuzz -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/support/headers/java.desktop -I /home/daniel/Projects/java/jdk/src/java.desktop/share/native/libharfbuzz -I /home/daniel/Projects/java/jdk/src/java.desktop/unix/native/common/awt -I /home/daniel/Projects/java/jdk/src/java.desktop/share/native/common/awt -I /home/daniel/Projects/java/jdk/src/java.desktop/unix/native/common/font -I /home/daniel/Projects/java/jdk/src/java.desktop/share/native/common/font -I /home/daniel/Projects/java/jdk/src/java.desktop/unix/native/libawt/java2d -I /home/daniel/Projects/java/jdk/src/java.desktop/share/native/libawt/java2d -I /home/daniel/Projects/java/jdk/src/java.desktop/share/native/libawt/java2d/pipe -I /home/daniel/Projects/java/jdk/src/java.desktop/share/native/libawt/java2d/loops -D _FORTIFY_SOURCE=2 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/c++/7.5.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/x86_64-linux-gnu/c++/7.5.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/x86_64-linux-gnu/c++/7.5.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/c++/7.5.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-10/lib/clang/10.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O3 -Wno-unused-parameter -Wno-unused -Wno-type-limits -Wno-missing-field-initializers -Wno-strict-aliasing -Wno-reorder -Wno-delete-non-virtual-dtor -Wno-strict-overflow -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-unused-result -Wno-extra -std=c++14 -fdeprecated-macro -fdebug-compilation-dir /home/daniel/Projects/java/jdk/make -ferror-limit 19 -fmessage-length 0 -fvisibility hidden -stack-protector 1 -fgnuc-version=4.2.1 -fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -faddrsig -o /home/daniel/Projects/java/scan/2021-12-21-193737-8510-1 -x c++ /home/daniel/Projects/java/jdk/src/java.desktop/share/native/libharfbuzz/hb-ot-shape-complex-arabic.cc

/home/daniel/Projects/java/jdk/src/java.desktop/share/native/libharfbuzz/hb-ot-shape-complex-arabic.cc

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1/*
2 * Copyright © 2010,2012 Google, 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 * Google Author(s): Behdad Esfahbod
25 */
26
27#include "hb.hh"
28
29#ifndef HB_NO_OT_SHAPE
30
31#include "hb-ot-shape-complex-arabic.hh"
32#include "hb-ot-shape.hh"
33
34
35/* buffer var allocations */
36#define arabic_shaping_action()var2.u8[3] complex_var_u8_auxiliary()var2.u8[3] /* arabic shaping action */
37
38#define HB_BUFFER_SCRATCH_FLAG_ARABIC_HAS_STCHHB_BUFFER_SCRATCH_FLAG_COMPLEX0 HB_BUFFER_SCRATCH_FLAG_COMPLEX0
39
40/* See:
41 * https://github.com/harfbuzz/harfbuzz/commit/6e6f82b6f3dde0fc6c3c7d991d9ec6cfff57823d#commitcomment-14248516 */
42#define HB_ARABIC_GENERAL_CATEGORY_IS_WORD(gen_cat)(((unsigned)(gen_cat) < 32 ? (((uint32_t) 1U) << (unsigned
)(gen_cat)) : 0) & ((static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_UNASSIGNED
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_UNASSIGNED
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_PRIVATE_USE
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_PRIVATE_USE
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_MODIFIER_LETTER
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_MODIFIER_LETTER
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_OTHER_LETTER
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_OTHER_LETTER
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_SPACING_MARK
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_SPACING_MARK
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_DECIMAL_NUMBER
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_DECIMAL_NUMBER
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_LETTER_NUMBER
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_LETTER_NUMBER
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_OTHER_NUMBER
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_OTHER_NUMBER
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_CURRENCY_SYMBOL
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_CURRENCY_SYMBOL
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_MODIFIER_SYMBOL
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_MODIFIER_SYMBOL
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_MATH_SYMBOL
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_MATH_SYMBOL
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_OTHER_SYMBOL
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_OTHER_SYMBOL
))))) \
43 (FLAG_UNSAFE (gen_cat)((unsigned)(gen_cat) < 32 ? (((uint32_t) 1U) << (unsigned
)(gen_cat)) : 0) & \
44 (FLAG (HB_UNICODE_GENERAL_CATEGORY_UNASSIGNED)(static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_UNASSIGNED
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_UNASSIGNED
))) | \
45 FLAG (HB_UNICODE_GENERAL_CATEGORY_PRIVATE_USE)(static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_PRIVATE_USE
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_PRIVATE_USE
))) | \
46 /*FLAG (HB_UNICODE_GENERAL_CATEGORY_LOWERCASE_LETTER) |*/ \
47 FLAG (HB_UNICODE_GENERAL_CATEGORY_MODIFIER_LETTER)(static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_MODIFIER_LETTER
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_MODIFIER_LETTER
))) | \
48 FLAG (HB_UNICODE_GENERAL_CATEGORY_OTHER_LETTER)(static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_OTHER_LETTER
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_OTHER_LETTER
))) | \
49 /*FLAG (HB_UNICODE_GENERAL_CATEGORY_TITLECASE_LETTER) |*/ \
50 /*FLAG (HB_UNICODE_GENERAL_CATEGORY_UPPERCASE_LETTER) |*/ \
51 FLAG (HB_UNICODE_GENERAL_CATEGORY_SPACING_MARK)(static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_SPACING_MARK
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_SPACING_MARK
))) | \
52 FLAG (HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK)(static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK
))) | \
53 FLAG (HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK)(static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK
))) | \
54 FLAG (HB_UNICODE_GENERAL_CATEGORY_DECIMAL_NUMBER)(static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_DECIMAL_NUMBER
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_DECIMAL_NUMBER
))) | \
55 FLAG (HB_UNICODE_GENERAL_CATEGORY_LETTER_NUMBER)(static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_LETTER_NUMBER
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_LETTER_NUMBER
))) | \
56 FLAG (HB_UNICODE_GENERAL_CATEGORY_OTHER_NUMBER)(static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_OTHER_NUMBER
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_OTHER_NUMBER
))) | \
57 FLAG (HB_UNICODE_GENERAL_CATEGORY_CURRENCY_SYMBOL)(static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_CURRENCY_SYMBOL
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_CURRENCY_SYMBOL
))) | \
58 FLAG (HB_UNICODE_GENERAL_CATEGORY_MODIFIER_SYMBOL)(static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_MODIFIER_SYMBOL
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_MODIFIER_SYMBOL
))) | \
59 FLAG (HB_UNICODE_GENERAL_CATEGORY_MATH_SYMBOL)(static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_MATH_SYMBOL
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_MATH_SYMBOL
))) | \
60 FLAG (HB_UNICODE_GENERAL_CATEGORY_OTHER_SYMBOL)(static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_OTHER_SYMBOL
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_OTHER_SYMBOL
)))))
61
62
63/*
64 * Joining types:
65 */
66
67/*
68 * Bits used in the joining tables
69 */
70enum hb_arabic_joining_type_t {
71 JOINING_TYPE_U = 0,
72 JOINING_TYPE_L = 1,
73 JOINING_TYPE_R = 2,
74 JOINING_TYPE_D = 3,
75 JOINING_TYPE_C = JOINING_TYPE_D,
76 JOINING_GROUP_ALAPH = 4,
77 JOINING_GROUP_DALATH_RISH = 5,
78 NUM_STATE_MACHINE_COLS = 6,
79
80 JOINING_TYPE_T = 7,
81 JOINING_TYPE_X = 8 /* means: use general-category to choose between U or T. */
82};
83
84#include "hb-ot-shape-complex-arabic-table.hh"
85
86static unsigned int get_joining_type (hb_codepoint_t u, hb_unicode_general_category_t gen_cat)
87{
88 unsigned int j_type = joining_type(u);
89 if (likely (j_type != JOINING_TYPE_X)(__builtin_expect (!!(j_type != JOINING_TYPE_X), 1)))
90 return j_type;
91
92 return (FLAG_UNSAFE(gen_cat)((unsigned)(gen_cat) < 32 ? (((uint32_t) 1U) << (unsigned
)(gen_cat)) : 0) &
93 (FLAG(HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK)(static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK
))) |
94 FLAG(HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK)(static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK
))) |
95 FLAG(HB_UNICODE_GENERAL_CATEGORY_FORMAT)(static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_FORMAT
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_FORMAT
))))
96 ) ? JOINING_TYPE_T : JOINING_TYPE_U;
97}
98
99#define FEATURE_IS_SYRIAC(tag)hb_in_range<unsigned char> ((unsigned char) (tag), '2',
'3') hb_in_range<unsigned char> ((unsigned char) (tag), '2', '3')
100
101static const hb_tag_t arabic_features[] =
102{
103 HB_TAG('i','s','o','l')((hb_tag_t)((((uint32_t)('i')&0xFF)<<24)|(((uint32_t
)('s')&0xFF)<<16)|(((uint32_t)('o')&0xFF)<<
8)|((uint32_t)('l')&0xFF))),
104 HB_TAG('f','i','n','a')((hb_tag_t)((((uint32_t)('f')&0xFF)<<24)|(((uint32_t
)('i')&0xFF)<<16)|(((uint32_t)('n')&0xFF)<<
8)|((uint32_t)('a')&0xFF))),
105 HB_TAG('f','i','n','2')((hb_tag_t)((((uint32_t)('f')&0xFF)<<24)|(((uint32_t
)('i')&0xFF)<<16)|(((uint32_t)('n')&0xFF)<<
8)|((uint32_t)('2')&0xFF))),
106 HB_TAG('f','i','n','3')((hb_tag_t)((((uint32_t)('f')&0xFF)<<24)|(((uint32_t
)('i')&0xFF)<<16)|(((uint32_t)('n')&0xFF)<<
8)|((uint32_t)('3')&0xFF))),
107 HB_TAG('m','e','d','i')((hb_tag_t)((((uint32_t)('m')&0xFF)<<24)|(((uint32_t
)('e')&0xFF)<<16)|(((uint32_t)('d')&0xFF)<<
8)|((uint32_t)('i')&0xFF))),
108 HB_TAG('m','e','d','2')((hb_tag_t)((((uint32_t)('m')&0xFF)<<24)|(((uint32_t
)('e')&0xFF)<<16)|(((uint32_t)('d')&0xFF)<<
8)|((uint32_t)('2')&0xFF))),
109 HB_TAG('i','n','i','t')((hb_tag_t)((((uint32_t)('i')&0xFF)<<24)|(((uint32_t
)('n')&0xFF)<<16)|(((uint32_t)('i')&0xFF)<<
8)|((uint32_t)('t')&0xFF))),
110 HB_TAG_NONE((hb_tag_t)((((uint32_t)(0)&0xFF)<<24)|(((uint32_t)
(0)&0xFF)<<16)|(((uint32_t)(0)&0xFF)<<8)|
((uint32_t)(0)&0xFF)))
111};
112
113
114/* Same order as the feature array */
115enum arabic_action_t {
116 ISOL,
117 FINA,
118 FIN2,
119 FIN3,
120 MEDI,
121 MED2,
122 INIT,
123
124 NONE,
125
126 ARABIC_NUM_FEATURES = NONE,
127
128 /* We abuse the same byte for other things... */
129 STCH_FIXED,
130 STCH_REPEATING,
131};
132
133static const struct arabic_state_table_entry {
134 uint8_t prev_action;
135 uint8_t curr_action;
136 uint16_t next_state;
137} arabic_state_table[][NUM_STATE_MACHINE_COLS] =
138{
139 /* jt_U, jt_L, jt_R, jt_D, jg_ALAPH, jg_DALATH_RISH */
140
141 /* State 0: prev was U, not willing to join. */
142 { {NONE,NONE,0}, {NONE,ISOL,2}, {NONE,ISOL,1}, {NONE,ISOL,2}, {NONE,ISOL,1}, {NONE,ISOL,6}, },
143
144 /* State 1: prev was R or ISOL/ALAPH, not willing to join. */
145 { {NONE,NONE,0}, {NONE,ISOL,2}, {NONE,ISOL,1}, {NONE,ISOL,2}, {NONE,FIN2,5}, {NONE,ISOL,6}, },
146
147 /* State 2: prev was D/L in ISOL form, willing to join. */
148 { {NONE,NONE,0}, {NONE,ISOL,2}, {INIT,FINA,1}, {INIT,FINA,3}, {INIT,FINA,4}, {INIT,FINA,6}, },
149
150 /* State 3: prev was D in FINA form, willing to join. */
151 { {NONE,NONE,0}, {NONE,ISOL,2}, {MEDI,FINA,1}, {MEDI,FINA,3}, {MEDI,FINA,4}, {MEDI,FINA,6}, },
152
153 /* State 4: prev was FINA ALAPH, not willing to join. */
154 { {NONE,NONE,0}, {NONE,ISOL,2}, {MED2,ISOL,1}, {MED2,ISOL,2}, {MED2,FIN2,5}, {MED2,ISOL,6}, },
155
156 /* State 5: prev was FIN2/FIN3 ALAPH, not willing to join. */
157 { {NONE,NONE,0}, {NONE,ISOL,2}, {ISOL,ISOL,1}, {ISOL,ISOL,2}, {ISOL,FIN2,5}, {ISOL,ISOL,6}, },
158
159 /* State 6: prev was DALATH/RISH, not willing to join. */
160 { {NONE,NONE,0}, {NONE,ISOL,2}, {NONE,ISOL,1}, {NONE,ISOL,2}, {NONE,FIN3,5}, {NONE,ISOL,6}, }
161};
162
163
164static void
165arabic_fallback_shape (const hb_ot_shape_plan_t *plan,
166 hb_font_t *font,
167 hb_buffer_t *buffer);
168
169static void
170record_stch (const hb_ot_shape_plan_t *plan,
171 hb_font_t *font,
172 hb_buffer_t *buffer);
173
174static void
175collect_features_arabic (hb_ot_shape_planner_t *plan)
176{
177 hb_ot_map_builder_t *map = &plan->map;
178
179 /* We apply features according to the Arabic spec, with pauses
180 * in between most.
181 *
182 * The pause between init/medi/... and rlig is required. See eg:
183 * https://bugzilla.mozilla.org/show_bug.cgi?id=644184
184 *
185 * The pauses between init/medi/... themselves are not necessarily
186 * needed as only one of those features is applied to any character.
187 * The only difference it makes is when fonts have contextual
188 * substitutions. We now follow the order of the spec, which makes
189 * for better experience if that's what Uniscribe is doing.
190 *
191 * At least for Arabic, looks like Uniscribe has a pause between
192 * rlig and calt. Otherwise the IranNastaliq's ALLAH ligature won't
193 * work. However, testing shows that rlig and calt are applied
194 * together for Mongolian in Uniscribe. As such, we only add a
195 * pause for Arabic, not other scripts.
196 *
197 * A pause after calt is required to make KFGQPC Uthmanic Script HAFS
198 * work correctly. See https://github.com/harfbuzz/harfbuzz/issues/505
199 */
200
201
202 map->enable_feature (HB_TAG('s','t','c','h')((hb_tag_t)((((uint32_t)('s')&0xFF)<<24)|(((uint32_t
)('t')&0xFF)<<16)|(((uint32_t)('c')&0xFF)<<
8)|((uint32_t)('h')&0xFF))));
203 map->add_gsub_pause (record_stch);
204
205 map->enable_feature (HB_TAG('c','c','m','p')((hb_tag_t)((((uint32_t)('c')&0xFF)<<24)|(((uint32_t
)('c')&0xFF)<<16)|(((uint32_t)('m')&0xFF)<<
8)|((uint32_t)('p')&0xFF))));
206 map->enable_feature (HB_TAG('l','o','c','l')((hb_tag_t)((((uint32_t)('l')&0xFF)<<24)|(((uint32_t
)('o')&0xFF)<<16)|(((uint32_t)('c')&0xFF)<<
8)|((uint32_t)('l')&0xFF))));
207
208 map->add_gsub_pause (nullptr);
209
210 for (unsigned int i = 0; i < ARABIC_NUM_FEATURES; i++)
211 {
212 bool has_fallback = plan->props.script == HB_SCRIPT_ARABIC && !FEATURE_IS_SYRIAC (arabic_features[i])hb_in_range<unsigned char> ((unsigned char) (arabic_features
[i]), '2', '3');
213 map->add_feature (arabic_features[i], has_fallback ? F_HAS_FALLBACK : F_NONE);
214 map->add_gsub_pause (nullptr);
215 }
216
217 /* Normally, Unicode says a ZWNJ means "don't ligate". In Arabic script
218 * however, it says a ZWJ should also mean "don't ligate". So we run
219 * the main ligating features as MANUAL_ZWJ. */
220
221 map->enable_feature (HB_TAG('r','l','i','g')((hb_tag_t)((((uint32_t)('r')&0xFF)<<24)|(((uint32_t
)('l')&0xFF)<<16)|(((uint32_t)('i')&0xFF)<<
8)|((uint32_t)('g')&0xFF))), F_MANUAL_ZWJ | F_HAS_FALLBACK);
222
223 if (plan->props.script == HB_SCRIPT_ARABIC)
224 map->add_gsub_pause (arabic_fallback_shape);
225
226 /* No pause after rclt. See 98460779bae19e4d64d29461ff154b3527bf8420. */
227 map->enable_feature (HB_TAG('r','c','l','t')((hb_tag_t)((((uint32_t)('r')&0xFF)<<24)|(((uint32_t
)('c')&0xFF)<<16)|(((uint32_t)('l')&0xFF)<<
8)|((uint32_t)('t')&0xFF))), F_MANUAL_ZWJ);
228 map->enable_feature (HB_TAG('c','a','l','t')((hb_tag_t)((((uint32_t)('c')&0xFF)<<24)|(((uint32_t
)('a')&0xFF)<<16)|(((uint32_t)('l')&0xFF)<<
8)|((uint32_t)('t')&0xFF))), F_MANUAL_ZWJ);
229 map->add_gsub_pause (nullptr);
230
231 /* The spec includes 'cswh'. Earlier versions of Windows
232 * used to enable this by default, but testing suggests
233 * that Windows 8 and later do not enable it by default,
234 * and spec now says 'Off by default'.
235 * We disabled this in ae23c24c32.
236 * Note that IranNastaliq uses this feature extensively
237 * to fixup broken glyph sequences. Oh well...
238 * Test case: U+0643,U+0640,U+0631. */
239 //map->enable_feature (HB_TAG('c','s','w','h'));
240 map->enable_feature (HB_TAG('m','s','e','t')((hb_tag_t)((((uint32_t)('m')&0xFF)<<24)|(((uint32_t
)('s')&0xFF)<<16)|(((uint32_t)('e')&0xFF)<<
8)|((uint32_t)('t')&0xFF))));
241}
242
243#include "hb-ot-shape-complex-arabic-fallback.hh"
244
245struct arabic_shape_plan_t
246{
247 /* The "+ 1" in the next array is to accommodate for the "NONE" command,
248 * which is not an OpenType feature, but this simplifies the code by not
249 * having to do a "if (... < NONE) ..." and just rely on the fact that
250 * mask_array[NONE] == 0. */
251 hb_mask_t mask_array[ARABIC_NUM_FEATURES + 1];
252
253 hb_atomic_ptr_t<arabic_fallback_plan_t> fallback_plan;
254
255 unsigned int do_fallback : 1;
256 unsigned int has_stch : 1;
257};
258
259void *
260data_create_arabic (const hb_ot_shape_plan_t *plan)
261{
262 arabic_shape_plan_t *arabic_plan = (arabic_shape_plan_t *) calloc (1, sizeof (arabic_shape_plan_t));
263 if (unlikely (!arabic_plan)(__builtin_expect (!!(!arabic_plan), 0)))
264 return nullptr;
265
266 arabic_plan->do_fallback = plan->props.script == HB_SCRIPT_ARABIC;
267 arabic_plan->has_stch = !!plan->map.get_1_mask (HB_TAG ('s','t','c','h')((hb_tag_t)((((uint32_t)('s')&0xFF)<<24)|(((uint32_t
)('t')&0xFF)<<16)|(((uint32_t)('c')&0xFF)<<
8)|((uint32_t)('h')&0xFF))));
268 for (unsigned int i = 0; i < ARABIC_NUM_FEATURES; i++) {
269 arabic_plan->mask_array[i] = plan->map.get_1_mask (arabic_features[i]);
270 arabic_plan->do_fallback = arabic_plan->do_fallback &&
271 (FEATURE_IS_SYRIAC (arabic_features[i])hb_in_range<unsigned char> ((unsigned char) (arabic_features
[i]), '2', '3') ||
272 plan->map.needs_fallback (arabic_features[i]));
273 }
274
275 return arabic_plan;
276}
277
278void
279data_destroy_arabic (void *data)
280{
281 arabic_shape_plan_t *arabic_plan = (arabic_shape_plan_t *) data;
282
283 arabic_fallback_plan_destroy (arabic_plan->fallback_plan);
284
285 free (data);
286}
287
288static void
289arabic_joining (hb_buffer_t *buffer)
290{
291 unsigned int count = buffer->len;
292 hb_glyph_info_t *info = buffer->info;
293 unsigned int prev = UINT_MAX(2147483647 *2U +1U), state = 0;
294
295 /* Check pre-context */
296 for (unsigned int i = 0; i < buffer->context_len[0]; i++)
297 {
298 unsigned int this_type = get_joining_type (buffer->context[0][i], buffer->unicode->general_category (buffer->context[0][i]));
299
300 if (unlikely (this_type == JOINING_TYPE_T)(__builtin_expect (!!(this_type == JOINING_TYPE_T), 0)))
301 continue;
302
303 const arabic_state_table_entry *entry = &arabic_state_table[state][this_type];
304 state = entry->next_state;
305 break;
306 }
307
308 for (unsigned int i = 0; i < count; i++)
309 {
310 unsigned int this_type = get_joining_type (info[i].codepoint, _hb_glyph_info_get_general_category (&info[i]));
311
312 if (unlikely (this_type == JOINING_TYPE_T)(__builtin_expect (!!(this_type == JOINING_TYPE_T), 0))) {
313 info[i].arabic_shaping_action()var2.u8[3] = NONE;
314 continue;
315 }
316
317 const arabic_state_table_entry *entry = &arabic_state_table[state][this_type];
318
319 if (entry->prev_action != NONE && prev != UINT_MAX(2147483647 *2U +1U))
320 {
321 info[prev].arabic_shaping_action()var2.u8[3] = entry->prev_action;
322 buffer->unsafe_to_break (prev, i + 1);
323 }
324
325 info[i].arabic_shaping_action()var2.u8[3] = entry->curr_action;
326
327 prev = i;
328 state = entry->next_state;
329 }
330
331 for (unsigned int i = 0; i < buffer->context_len[1]; i++)
332 {
333 unsigned int this_type = get_joining_type (buffer->context[1][i], buffer->unicode->general_category (buffer->context[1][i]));
334
335 if (unlikely (this_type == JOINING_TYPE_T)(__builtin_expect (!!(this_type == JOINING_TYPE_T), 0)))
336 continue;
337
338 const arabic_state_table_entry *entry = &arabic_state_table[state][this_type];
339 if (entry->prev_action != NONE && prev != UINT_MAX(2147483647 *2U +1U))
340 info[prev].arabic_shaping_action()var2.u8[3] = entry->prev_action;
341 break;
342 }
343}
344
345static void
346mongolian_variation_selectors (hb_buffer_t *buffer)
347{
348 /* Copy arabic_shaping_action() from base to Mongolian variation selectors. */
349 unsigned int count = buffer->len;
350 hb_glyph_info_t *info = buffer->info;
351 for (unsigned int i = 1; i < count; i++)
352 if (unlikely (hb_in_range<hb_codepoint_t> (info[i].codepoint, 0x180Bu, 0x180Du))(__builtin_expect (!!(hb_in_range<hb_codepoint_t> (info
[i].codepoint, 0x180Bu, 0x180Du)), 0)))
353 info[i].arabic_shaping_action()var2.u8[3] = info[i - 1].arabic_shaping_action()var2.u8[3];
354}
355
356void
357setup_masks_arabic_plan (const arabic_shape_plan_t *arabic_plan,
358 hb_buffer_t *buffer,
359 hb_script_t script)
360{
361 HB_BUFFER_ALLOCATE_VAR (buffer, arabic_shaping_action)buffer->allocate_var (__builtin_offsetof(hb_glyph_info_t, var2
.u8[3]) - __builtin_offsetof(hb_glyph_info_t, var1), sizeof (
buffer->info[0].var2.u8[3]));
362
363 arabic_joining (buffer);
364 if (script == HB_SCRIPT_MONGOLIAN)
365 mongolian_variation_selectors (buffer);
366
367 unsigned int count = buffer->len;
368 hb_glyph_info_t *info = buffer->info;
369 for (unsigned int i = 0; i < count; i++)
370 info[i].mask |= arabic_plan->mask_array[info[i].arabic_shaping_action()var2.u8[3]];
371}
372
373static void
374setup_masks_arabic (const hb_ot_shape_plan_t *plan,
375 hb_buffer_t *buffer,
376 hb_font_t *font HB_UNUSED__attribute__((unused)))
377{
378 const arabic_shape_plan_t *arabic_plan = (const arabic_shape_plan_t *) plan->data;
379 setup_masks_arabic_plan (arabic_plan, buffer, plan->props.script);
380}
381
382static void
383arabic_fallback_shape (const hb_ot_shape_plan_t *plan,
384 hb_font_t *font,
385 hb_buffer_t *buffer)
386{
387#ifdef HB_NO_OT_SHAPE_COMPLEX_ARABIC_FALLBACK
388 return;
389#endif
390
391 const arabic_shape_plan_t *arabic_plan = (const arabic_shape_plan_t *) plan->data;
392
393 if (!arabic_plan->do_fallback)
1
Assuming field 'do_fallback' is not equal to 0
→
2
←
Taking false branch
→
394 return;
395
396retry:
397 arabic_fallback_plan_t *fallback_plan = arabic_plan->fallback_plan;
398 if (unlikely (!fallback_plan)(__builtin_expect (!!(!fallback_plan), 0)))
3
←
Assuming 'fallback_plan' is null
→
4
←
Taking true branch
→
399 {
400 /* This sucks. We need a font to build the fallback plan... */
401 fallback_plan = arabic_fallback_plan_create (plan, font);
402 if (unlikely (!arabic_plan->fallback_plan.cmpexch (nullptr, fallback_plan))(__builtin_expect (!!(!arabic_plan->fallback_plan.cmpexch (
nullptr, fallback_plan)), 0)))
5
←
Assuming the condition is true
→
6
←
Taking true branch
→
403 {
404 arabic_fallback_plan_destroy (fallback_plan);
7
←
Calling 'arabic_fallback_plan_destroy'
→
405 goto retry;
406 }
407 }
408
409 arabic_fallback_plan_shape (fallback_plan, font, buffer);
410}
411
412/*
413 * Stretch feature: "stch".
414 * See example here:
415 * https://docs.microsoft.com/en-us/typography/script-development/syriac
416 * We implement this in a generic way, such that the Arabic subtending
417 * marks can use it as well.
418 */
419
420static void
421record_stch (const hb_ot_shape_plan_t *plan,
422 hb_font_t *font HB_UNUSED__attribute__((unused)),
423 hb_buffer_t *buffer)
424{
425 const arabic_shape_plan_t *arabic_plan = (const arabic_shape_plan_t *) plan->data;
426 if (!arabic_plan->has_stch)
427 return;
428
429 /* 'stch' feature was just applied. Look for anything that multiplied,
430 * and record it for stch treatment later. Note that rtlm, frac, etc
431 * are applied before stch, but we assume that they didn't result in
432 * anything multiplying into 5 pieces, so it's safe-ish... */
433
434 unsigned int count = buffer->len;
435 hb_glyph_info_t *info = buffer->info;
436 for (unsigned int i = 0; i < count; i++)
437 if (unlikely (_hb_glyph_info_multiplied (&info[i]))(__builtin_expect (!!(_hb_glyph_info_multiplied (&info[i]
)), 0)))
438 {
439 unsigned int comp = _hb_glyph_info_get_lig_comp (&info[i]);
440 info[i].arabic_shaping_action()var2.u8[3] = comp % 2 ? STCH_REPEATING : STCH_FIXED;
441 buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_ARABIC_HAS_STCHHB_BUFFER_SCRATCH_FLAG_COMPLEX0;
442 }
443}
444
445static void
446apply_stch (const hb_ot_shape_plan_t *plan HB_UNUSED__attribute__((unused)),
447 hb_buffer_t *buffer,
448 hb_font_t *font)
449{
450 if (likely (!(buffer->scratch_flags & HB_BUFFER_SCRATCH_FLAG_ARABIC_HAS_STCH))(__builtin_expect (!!(!(buffer->scratch_flags & HB_BUFFER_SCRATCH_FLAG_COMPLEX0
)), 1)))
451 return;
452
453 /* The Arabic shaper currently always processes in RTL mode, so we should
454 * stretch / position the stretched pieces to the left / preceding glyphs. */
455
456 /* We do a two pass implementation:
457 * First pass calculates the exact number of extra glyphs we need,
458 * We then enlarge buffer to have that much room,
459 * Second pass applies the stretch, copying things to the end of buffer.
460 */
461
462 int sign = font->x_scale < 0 ? -1 : +1;
463 unsigned int extra_glyphs_needed = 0; // Set during MEASURE, used during CUT
464 enum { MEASURE, CUT } /* step_t */;
465
466 for (unsigned int step = MEASURE; step <= CUT; step = step + 1)
467 {
468 unsigned int count = buffer->len;
469 hb_glyph_info_t *info = buffer->info;
470 hb_glyph_position_t *pos = buffer->pos;
471 unsigned int new_len = count + extra_glyphs_needed; // write head during CUT
472 unsigned int j = new_len;
473 for (unsigned int i = count; i; i--)
474 {
475 if (!hb_in_range<uint8_t> (info[i - 1].arabic_shaping_action()var2.u8[3], STCH_FIXED, STCH_REPEATING))
476 {
477 if (step == CUT)
478 {
479 --j;
480 info[j] = info[i - 1];
481 pos[j] = pos[i - 1];
482 }
483 continue;
484 }
485
486 /* Yay, justification! */
487
488 hb_position_t w_total = 0; // Total to be filled
489 hb_position_t w_fixed = 0; // Sum of fixed tiles
490 hb_position_t w_repeating = 0; // Sum of repeating tiles
491 int n_fixed = 0;
492 int n_repeating = 0;
493
494 unsigned int end = i;
495 while (i &&
496 hb_in_range<uint8_t> (info[i - 1].arabic_shaping_action()var2.u8[3], STCH_FIXED, STCH_REPEATING))
497 {
498 i--;
499 hb_position_t width = font->get_glyph_h_advance (info[i].codepoint);
500 if (info[i].arabic_shaping_action()var2.u8[3] == STCH_FIXED)
501 {
502 w_fixed += width;
503 n_fixed++;
504 }
505 else
506 {
507 w_repeating += width;
508 n_repeating++;
509 }
510 }
511 unsigned int start = i;
512 unsigned int context = i;
513 while (context &&
514 !hb_in_range<uint8_t> (info[context - 1].arabic_shaping_action()var2.u8[3], STCH_FIXED, STCH_REPEATING) &&
515 (_hb_glyph_info_is_default_ignorable (&info[context - 1]) ||
516 HB_ARABIC_GENERAL_CATEGORY_IS_WORD (_hb_glyph_info_get_general_category (&info[context - 1]))(((unsigned)(_hb_glyph_info_get_general_category (&info[context
- 1])) < 32 ? (((uint32_t) 1U) << (unsigned)(_hb_glyph_info_get_general_category
(&info[context - 1]))) : 0) & ((static_assert_expr<
(unsigned)(HB_UNICODE_GENERAL_CATEGORY_UNASSIGNED) < 32>
::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_UNASSIGNED
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_PRIVATE_USE
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_PRIVATE_USE
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_MODIFIER_LETTER
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_MODIFIER_LETTER
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_OTHER_LETTER
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_OTHER_LETTER
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_SPACING_MARK
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_SPACING_MARK
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_DECIMAL_NUMBER
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_DECIMAL_NUMBER
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_LETTER_NUMBER
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_LETTER_NUMBER
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_OTHER_NUMBER
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_OTHER_NUMBER
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_CURRENCY_SYMBOL
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_CURRENCY_SYMBOL
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_MODIFIER_SYMBOL
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_MODIFIER_SYMBOL
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_MATH_SYMBOL
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_MATH_SYMBOL
))) | (static_assert_expr<(unsigned)(HB_UNICODE_GENERAL_CATEGORY_OTHER_SYMBOL
) < 32>::value + (((uint32_t) 1U) << (unsigned)(HB_UNICODE_GENERAL_CATEGORY_OTHER_SYMBOL
)))))))
517 {
518 context--;
519 w_total += pos[context].x_advance;
520 }
521 i++; // Don't touch i again.
522
523 DEBUG_MSG (ARABIC, nullptr, "%s stretch at (%d,%d,%d)",_hb_debug_msg<(0 +0)> ("ARABIC", (nullptr), nullptr, false
, 0, 0, "%s stretch at (%d,%d,%d)", step == MEASURE ? "measuring"
: "cutting", context, start, end)
524 step == MEASURE ? "measuring" : "cutting", context, start, end)_hb_debug_msg<(0 +0)> ("ARABIC", (nullptr), nullptr, false
, 0, 0, "%s stretch at (%d,%d,%d)", step == MEASURE ? "measuring"
: "cutting", context, start, end);
525 DEBUG_MSG (ARABIC, nullptr, "rest of word: count=%d width %d", start - context, w_total)_hb_debug_msg<(0 +0)> ("ARABIC", (nullptr), nullptr, false
, 0, 0, "rest of word: count=%d width %d", start - context
, w_total);
526 DEBUG_MSG (ARABIC, nullptr, "fixed tiles: count=%d width=%d", n_fixed, w_fixed)_hb_debug_msg<(0 +0)> ("ARABIC", (nullptr), nullptr, false
, 0, 0, "fixed tiles: count=%d width=%d", n_fixed, w_fixed
);
527 DEBUG_MSG (ARABIC, nullptr, "repeating tiles: count=%d width=%d", n_repeating, w_repeating)_hb_debug_msg<(0 +0)> ("ARABIC", (nullptr), nullptr, false
, 0, 0, "repeating tiles: count=%d width=%d", n_repeating, w_repeating
);
528
529 /* Number of additional times to repeat each repeating tile. */
530 int n_copies = 0;
531
532 hb_position_t w_remaining = w_total - w_fixed;
533 if (sign * w_remaining > sign * w_repeating && sign * w_repeating > 0)
534 n_copies = (sign * w_remaining) / (sign * w_repeating) - 1;
535
536 /* See if we can improve the fit by adding an extra repeat and squeezing them together a bit. */
537 hb_position_t extra_repeat_overlap = 0;
538 hb_position_t shortfall = sign * w_remaining - sign * w_repeating * (n_copies + 1);
539 if (shortfall > 0 && n_repeating > 0)
540 {
541 ++n_copies;
542 hb_position_t excess = (n_copies + 1) * sign * w_repeating - sign * w_remaining;
543 if (excess > 0)
544 extra_repeat_overlap = excess / (n_copies * n_repeating);
545 }
546
547 if (step == MEASURE)
548 {
549 extra_glyphs_needed += n_copies * n_repeating;
550 DEBUG_MSG (ARABIC, nullptr, "will add extra %d copies of repeating tiles", n_copies)_hb_debug_msg<(0 +0)> ("ARABIC", (nullptr), nullptr, false
, 0, 0, "will add extra %d copies of repeating tiles", n_copies
);
551 }
552 else
553 {
554 buffer->unsafe_to_break (context, end);
555 hb_position_t x_offset = 0;
556 for (unsigned int k = end; k > start; k--)
557 {
558 hb_position_t width = font->get_glyph_h_advance (info[k - 1].codepoint);
559
560 unsigned int repeat = 1;
561 if (info[k - 1].arabic_shaping_action()var2.u8[3] == STCH_REPEATING)
562 repeat += n_copies;
563
564 DEBUG_MSG (ARABIC, nullptr, "appending %d copies of glyph %d; j=%d",_hb_debug_msg<(0 +0)> ("ARABIC", (nullptr), nullptr, false
, 0, 0, "appending %d copies of glyph %d; j=%d", repeat, info
[k - 1].codepoint, j)
565 repeat, info[k - 1].codepoint, j)_hb_debug_msg<(0 +0)> ("ARABIC", (nullptr), nullptr, false
, 0, 0, "appending %d copies of glyph %d; j=%d", repeat, info
[k - 1].codepoint, j);
566 for (unsigned int n = 0; n < repeat; n++)
567 {
568 x_offset -= width;
569 if (n > 0)
570 x_offset += extra_repeat_overlap;
571 pos[k - 1].x_offset = x_offset;
572 /* Append copy. */
573 --j;
574 info[j] = info[k - 1];
575 pos[j] = pos[k - 1];
576 }
577 }
578 }
579 }
580
581 if (step == MEASURE)
582 {
583 if (unlikely (!buffer->ensure (count + extra_glyphs_needed))(__builtin_expect (!!(!buffer->ensure (count + extra_glyphs_needed
)), 0)))
584 break;
585 }
586 else
587 {
588 assert (j == 0)(static_cast <bool> (j == 0) ? void (0) : __assert_fail
("j == 0", "/home/daniel/Projects/java/jdk/src/java.desktop/share/native/libharfbuzz/hb-ot-shape-complex-arabic.cc"
, 588, __extension__ __PRETTY_FUNCTION__));
589 buffer->len = new_len;
590 }
591 }
592}
593
594
595static void
596postprocess_glyphs_arabic (const hb_ot_shape_plan_t *plan,
597 hb_buffer_t *buffer,
598 hb_font_t *font)
599{
600 apply_stch (plan, buffer, font);
601
602 HB_BUFFER_DEALLOCATE_VAR (buffer, arabic_shaping_action)buffer->deallocate_var (__builtin_offsetof(hb_glyph_info_t
, var2.u8[3]) - __builtin_offsetof(hb_glyph_info_t, var1), sizeof
(buffer->info[0].var2.u8[3]));
603}
604
605/* https://www.unicode.org/reports/tr53/ */
606
607static hb_codepoint_t
608modifier_combining_marks[] =
609{
610 0x0654u, /* ARABIC HAMZA ABOVE */
611 0x0655u, /* ARABIC HAMZA BELOW */
612 0x0658u, /* ARABIC MARK NOON GHUNNA */
613 0x06DCu, /* ARABIC SMALL HIGH SEEN */
614 0x06E3u, /* ARABIC SMALL LOW SEEN */
615 0x06E7u, /* ARABIC SMALL HIGH YEH */
616 0x06E8u, /* ARABIC SMALL HIGH NOON */
617 0x08D3u, /* ARABIC SMALL LOW WAW */
618 0x08F3u, /* ARABIC SMALL HIGH WAW */
619};
620
621static inline bool
622info_is_mcm (const hb_glyph_info_t &info)
623{
624 hb_codepoint_t u = info.codepoint;
625 for (unsigned int i = 0; i < ARRAY_LENGTH (modifier_combining_marks); i++)
626 if (u == modifier_combining_marks[i])
627 return true;
628 return false;
629}
630
631static void
632reorder_marks_arabic (const hb_ot_shape_plan_t *plan HB_UNUSED__attribute__((unused)),
633 hb_buffer_t *buffer,
634 unsigned int start,
635 unsigned int end)
636{
637 hb_glyph_info_t *info = buffer->info;
638
639 DEBUG_MSG (ARABIC, buffer, "Reordering marks from %d to %d", start, end)_hb_debug_msg<(0 +0)> ("ARABIC", (buffer), nullptr, false
, 0, 0, "Reordering marks from %d to %d", start, end);
640
641 unsigned int i = start;
642 for (unsigned int cc = 220; cc <= 230; cc += 10)
643 {
644 DEBUG_MSG (ARABIC, buffer, "Looking for %d's starting at %d", cc, i)_hb_debug_msg<(0 +0)> ("ARABIC", (buffer), nullptr, false
, 0, 0, "Looking for %d's starting at %d", cc, i);
645 while (i < end && info_cc(info[i])(_hb_glyph_info_get_modified_combining_class (&(info[i]))
) < cc)
646 i++;
647 DEBUG_MSG (ARABIC, buffer, "Looking for %d's stopped at %d", cc, i)_hb_debug_msg<(0 +0)> ("ARABIC", (buffer), nullptr, false
, 0, 0, "Looking for %d's stopped at %d", cc, i);
648
649 if (i == end)
650 break;
651
652 if (info_cc(info[i])(_hb_glyph_info_get_modified_combining_class (&(info[i]))
) > cc)
653 continue;
654
655 unsigned int j = i;
656 while (j < end && info_cc(info[j])(_hb_glyph_info_get_modified_combining_class (&(info[j]))
) == cc && info_is_mcm (info[j]))
657 j++;
658
659 if (i == j)
660 continue;
661
662 DEBUG_MSG (ARABIC, buffer, "Found %d's from %d to %d", cc, i, j)_hb_debug_msg<(0 +0)> ("ARABIC", (buffer), nullptr, false
, 0, 0, "Found %d's from %d to %d", cc, i, j);
663
664 /* Shift it! */
665 DEBUG_MSG (ARABIC, buffer, "Shifting %d's: %d %d", cc, i, j)_hb_debug_msg<(0 +0)> ("ARABIC", (buffer), nullptr, false
, 0, 0, "Shifting %d's: %d %d", cc, i, j);
666 hb_glyph_info_t temp[HB_OT_SHAPE_COMPLEX_MAX_COMBINING_MARKS32];
667 assert (j - i <= ARRAY_LENGTH (temp))(static_cast <bool> (j - i <= ARRAY_LENGTH (temp)) ?
void (0) : __assert_fail ("j - i <= ARRAY_LENGTH (temp)",
"/home/daniel/Projects/java/jdk/src/java.desktop/share/native/libharfbuzz/hb-ot-shape-complex-arabic.cc"
, 667, __extension__ __PRETTY_FUNCTION__));
668 buffer->merge_clusters (start, j);
669 memmove (temp, &info[i], (j - i) * sizeof (hb_glyph_info_t));
670 memmove (&info[start + j - i], &info[start], (i - start) * sizeof (hb_glyph_info_t));
671 memmove (&info[start], temp, (j - i) * sizeof (hb_glyph_info_t));
672
673 /* Renumber CC such that the reordered sequence is still sorted.
674 * 22 and 26 are chosen because they are smaller than all Arabic categories,
675 * and are folded back to 220/230 respectively during fallback mark positioning.
676 *
677 * We do this because the CGJ-handling logic in the normalizer relies on
678 * mark sequences having an increasing order even after this reordering.
679 * https://github.com/harfbuzz/harfbuzz/issues/554
680 * This, however, does break some obscure sequences, where the normalizer
681 * might compose a sequence that it should not. For example, in the seequence
682 * ALEF, HAMZAH, MADDAH, we should NOT try to compose ALEF+MADDAH, but with this
683 * renumbering, we will.
684 */
685 unsigned int new_start = start + j - i;
686 unsigned int new_cc = cc == 220 ? HB_MODIFIED_COMBINING_CLASS_CCC2225 : HB_MODIFIED_COMBINING_CLASS_CCC2626;
687 while (start < new_start)
688 {
689 _hb_glyph_info_set_modified_combining_class (&info[start], new_cc);
690 start++;
691 }
692
693 i = j;
694 }
695}
696
697const hb_ot_complex_shaper_t _hb_ot_complex_shaper_arabic =
698{
699 collect_features_arabic,
700 nullptr, /* override_features */
701 data_create_arabic,
702 data_destroy_arabic,
703 nullptr, /* preprocess_text */
704 postprocess_glyphs_arabic,
705 HB_OT_SHAPE_NORMALIZATION_MODE_DEFAULT,
706 nullptr, /* decompose */
707 nullptr, /* compose */
708 setup_masks_arabic,
709 HB_TAG_NONE((hb_tag_t)((((uint32_t)(0)&0xFF)<<24)|(((uint32_t)
(0)&0xFF)<<16)|(((uint32_t)(0)&0xFF)<<8)|
((uint32_t)(0)&0xFF))), /* gpos_tag */
710 reorder_marks_arabic,
711 HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_LATE,
712 true, /* fallback_position */
713};
714
715
716#endif
←

/home/daniel/Projects/java/jdk/src/java.desktop/share/native/libharfbuzz/hb-ot-shape-complex-arabic-fallback.hh

1/*
2 * Copyright © 2012 Google, 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 * Google Author(s): Behdad Esfahbod
25 */
26
27#ifndef HB_OT_SHAPE_COMPLEX_ARABIC_FALLBACK_HH
28#define HB_OT_SHAPE_COMPLEX_ARABIC_FALLBACK_HH
29
30#include "hb.hh"
31
32#include "hb-ot-shape.hh"
33#include "hb-ot-layout-gsub-table.hh"
34
35
36/* Features ordered the same as the entries in shaping_table rows,
37 * followed by rlig. Don't change. */
38static const hb_tag_t arabic_fallback_features[] =
39{
40 HB_TAG('i','n','i','t')((hb_tag_t)((((uint32_t)('i')&0xFF)<<24)|(((uint32_t
)('n')&0xFF)<<16)|(((uint32_t)('i')&0xFF)<<
8)|((uint32_t)('t')&0xFF))),
41 HB_TAG('m','e','d','i')((hb_tag_t)((((uint32_t)('m')&0xFF)<<24)|(((uint32_t
)('e')&0xFF)<<16)|(((uint32_t)('d')&0xFF)<<
8)|((uint32_t)('i')&0xFF))),
42 HB_TAG('f','i','n','a')((hb_tag_t)((((uint32_t)('f')&0xFF)<<24)|(((uint32_t
)('i')&0xFF)<<16)|(((uint32_t)('n')&0xFF)<<
8)|((uint32_t)('a')&0xFF))),
43 HB_TAG('i','s','o','l')((hb_tag_t)((((uint32_t)('i')&0xFF)<<24)|(((uint32_t
)('s')&0xFF)<<16)|(((uint32_t)('o')&0xFF)<<
8)|((uint32_t)('l')&0xFF))),
44 HB_TAG('r','l','i','g')((hb_tag_t)((((uint32_t)('r')&0xFF)<<24)|(((uint32_t
)('l')&0xFF)<<16)|(((uint32_t)('i')&0xFF)<<
8)|((uint32_t)('g')&0xFF))),
45};
46
47static OT::SubstLookup *
48arabic_fallback_synthesize_lookup_single (const hb_ot_shape_plan_t *plan HB_UNUSED__attribute__((unused)),
49 hb_font_t *font,
50 unsigned int feature_index)
51{
52 OT::HBGlyphID glyphs[SHAPING_TABLE_LAST0x06D3u - SHAPING_TABLE_FIRST0x0621u + 1];
53 OT::HBGlyphID substitutes[SHAPING_TABLE_LAST0x06D3u - SHAPING_TABLE_FIRST0x0621u + 1];
54 unsigned int num_glyphs = 0;
55
56 /* Populate arrays */
57 for (hb_codepoint_t u = SHAPING_TABLE_FIRST0x0621u; u < SHAPING_TABLE_LAST0x06D3u + 1; u++)
58 {
59 hb_codepoint_t s = shaping_table[u - SHAPING_TABLE_FIRST0x0621u][feature_index];
60 hb_codepoint_t u_glyph, s_glyph;
61
62 if (!s ||
63 !hb_font_get_glyph (font, u, 0, &u_glyph) ||
64 !hb_font_get_glyph (font, s, 0, &s_glyph) ||
65 u_glyph == s_glyph ||
66 u_glyph > 0xFFFFu || s_glyph > 0xFFFFu)
67 continue;
68
69 glyphs[num_glyphs] = u_glyph;
70 substitutes[num_glyphs] = s_glyph;
71
72 num_glyphs++;
73 }
74
75 if (!num_glyphs)
76 return nullptr;
77
78 /* Bubble-sort or something equally good!
79 * May not be good-enough for presidential candidate interviews, but good-enough for us... */
80 hb_stable_sort (&glyphs[0], num_glyphs,
81 (int(*)(const OT::HBUINT16*, const OT::HBUINT16 *)) OT::HBGlyphID::cmp,
82 &substitutes[0]);
83
84
85 /* Each glyph takes four bytes max, and there's some overhead. */
86 char buf[(SHAPING_TABLE_LAST0x06D3u - SHAPING_TABLE_FIRST0x0621u + 1) * 4 + 128];
87 hb_serialize_context_t c (buf, sizeof (buf));
88 OT::SubstLookup *lookup = c.start_serialize<OT::SubstLookup> ();
89 bool ret = lookup->serialize_single (&c,
90 OT::LookupFlag::IgnoreMarks,
91 hb_sorted_array (glyphs, num_glyphs),
92 hb_array (substitutes, num_glyphs));
93 c.end_serialize ();
94
95 return ret && !c.in_error () ? c.copy<OT::SubstLookup> () : nullptr;
96}
97
98static OT::SubstLookup *
99arabic_fallback_synthesize_lookup_ligature (const hb_ot_shape_plan_t *plan HB_UNUSED__attribute__((unused)),
100 hb_font_t *font)
101{
102 OT::HBGlyphID first_glyphs[ARRAY_LENGTH_CONST (ligature_table)((signed int) (sizeof (ligature_table) / sizeof (ligature_table
[0])))];
103 unsigned int first_glyphs_indirection[ARRAY_LENGTH_CONST (ligature_table)((signed int) (sizeof (ligature_table) / sizeof (ligature_table
[0])))];
104 unsigned int ligature_per_first_glyph_count_list[ARRAY_LENGTH_CONST (first_glyphs)((signed int) (sizeof (first_glyphs) / sizeof (first_glyphs[0
])))];
105 unsigned int num_first_glyphs = 0;
106
107 /* We know that all our ligatures are 2-component */
108 OT::HBGlyphID ligature_list[ARRAY_LENGTH_CONST (first_glyphs)((signed int) (sizeof (first_glyphs) / sizeof (first_glyphs[0
]))) * ARRAY_LENGTH_CONST(ligature_table[0].ligatures)((signed int) (sizeof (ligature_table[0].ligatures) / sizeof (
ligature_table[0].ligatures[0])))];
109 unsigned int component_count_list[ARRAY_LENGTH_CONST (ligature_list)((signed int) (sizeof (ligature_list) / sizeof (ligature_list
[0])))];
110 OT::HBGlyphID component_list[ARRAY_LENGTH_CONST (ligature_list)((signed int) (sizeof (ligature_list) / sizeof (ligature_list
[0]))) * 1/* One extra component per ligature */];
111 unsigned int num_ligatures = 0;
112
113 /* Populate arrays */
114
115 /* Sort out the first-glyphs */
116 for (unsigned int first_glyph_idx = 0; first_glyph_idx < ARRAY_LENGTH (first_glyphs); first_glyph_idx++)
117 {
118 hb_codepoint_t first_u = ligature_table[first_glyph_idx].first;
119 hb_codepoint_t first_glyph;
120 if (!hb_font_get_glyph (font, first_u, 0, &first_glyph))
121 continue;
122 first_glyphs[num_first_glyphs] = first_glyph;
123 ligature_per_first_glyph_count_list[num_first_glyphs] = 0;
124 first_glyphs_indirection[num_first_glyphs] = first_glyph_idx;
125 num_first_glyphs++;
126 }
127 hb_stable_sort (&first_glyphs[0], num_first_glyphs,
128 (int(*)(const OT::HBUINT16*, const OT::HBUINT16 *)) OT::HBGlyphID::cmp,
129 &first_glyphs_indirection[0]);
130
131 /* Now that the first-glyphs are sorted, walk again, populate ligatures. */
132 for (unsigned int i = 0; i < num_first_glyphs; i++)
133 {
134 unsigned int first_glyph_idx = first_glyphs_indirection[i];
135
136 for (unsigned int second_glyph_idx = 0; second_glyph_idx < ARRAY_LENGTH (ligature_table[0].ligatures); second_glyph_idx++)
137 {
138 hb_codepoint_t second_u = ligature_table[first_glyph_idx].ligatures[second_glyph_idx].second;
139 hb_codepoint_t ligature_u = ligature_table[first_glyph_idx].ligatures[second_glyph_idx].ligature;
140 hb_codepoint_t second_glyph, ligature_glyph;
141 if (!second_u ||
142 !hb_font_get_glyph (font, second_u, 0, &second_glyph) ||
143 !hb_font_get_glyph (font, ligature_u, 0, &ligature_glyph))
144 continue;
145
146 ligature_per_first_glyph_count_list[i]++;
147
148 ligature_list[num_ligatures] = ligature_glyph;
149 component_count_list[num_ligatures] = 2;
150 component_list[num_ligatures] = second_glyph;
151 num_ligatures++;
152 }
153 }
154
155 if (!num_ligatures)
156 return nullptr;
157
158
159 /* 16 bytes per ligature ought to be enough... */
160 char buf[ARRAY_LENGTH_CONST (ligature_list)((signed int) (sizeof (ligature_list) / sizeof (ligature_list
[0]))) * 16 + 128];
161 hb_serialize_context_t c (buf, sizeof (buf));
162 OT::SubstLookup *lookup = c.start_serialize<OT::SubstLookup> ();
163 bool ret = lookup->serialize_ligature (&c,
164 OT::LookupFlag::IgnoreMarks,
165 hb_sorted_array (first_glyphs, num_first_glyphs),
166 hb_array (ligature_per_first_glyph_count_list, num_first_glyphs),
167 hb_array (ligature_list, num_ligatures),
168 hb_array (component_count_list, num_ligatures),
169 hb_array (component_list, num_ligatures));
170 c.end_serialize ();
171 /* TODO sanitize the results? */
172
173 return ret && !c.in_error () ? c.copy<OT::SubstLookup> () : nullptr;
174}
175
176static OT::SubstLookup *
177arabic_fallback_synthesize_lookup (const hb_ot_shape_plan_t *plan,
178 hb_font_t *font,
179 unsigned int feature_index)
180{
181 if (feature_index < 4)
182 return arabic_fallback_synthesize_lookup_single (plan, font, feature_index);
183 else
184 return arabic_fallback_synthesize_lookup_ligature (plan, font);
185}
186
187#define ARABIC_FALLBACK_MAX_LOOKUPS5 5
188
189struct arabic_fallback_plan_t
190{
191 unsigned int num_lookups;
192 bool free_lookups;
193
194 hb_mask_t mask_array[ARABIC_FALLBACK_MAX_LOOKUPS5];
195 OT::SubstLookup *lookup_array[ARABIC_FALLBACK_MAX_LOOKUPS5];
196 OT::hb_ot_layout_lookup_accelerator_t accel_array[ARABIC_FALLBACK_MAX_LOOKUPS5];
197};
198
199#if defined(_WIN32) && !defined(HB_NO_WIN1256)
200#define HB_WITH_WIN1256
201#endif
202
203#ifdef HB_WITH_WIN1256
204#include "hb-ot-shape-complex-arabic-win1256.hh"
205#endif
206
207struct ManifestLookup
208{
209 public:
210 OT::Tag tag;
211 OT::OffsetTo<OT::SubstLookup> lookupOffset;
212 public:
213 DEFINE_SIZE_STATIC (6)void _instance_assertion_on_line_213 () const { static_assert
((sizeof (*this) == (6)), ""); } unsigned int get_size () const
{ return (6); } static constexpr unsigned null_size = (6); static
constexpr unsigned min_size = (6); static constexpr unsigned
static_size = (6);
214};
215typedef OT::ArrayOf<ManifestLookup> Manifest;
216
217static bool
218arabic_fallback_plan_init_win1256 (arabic_fallback_plan_t *fallback_plan HB_UNUSED__attribute__((unused)),
219 const hb_ot_shape_plan_t *plan HB_UNUSED__attribute__((unused)),
220 hb_font_t *font HB_UNUSED__attribute__((unused)))
221{
222#ifdef HB_WITH_WIN1256
223 /* Does this font look like it's Windows-1256-encoded? */
224 hb_codepoint_t g;
225 if (!(hb_font_get_glyph (font, 0x0627u, 0, &g) && g == 199 /* ALEF */ &&
226 hb_font_get_glyph (font, 0x0644u, 0, &g) && g == 225 /* LAM */ &&
227 hb_font_get_glyph (font, 0x0649u, 0, &g) && g == 236 /* ALEF MAKSURA */ &&
228 hb_font_get_glyph (font, 0x064Au, 0, &g) && g == 237 /* YEH */ &&
229 hb_font_get_glyph (font, 0x0652u, 0, &g) && g == 250 /* SUKUN */))
230 return false;
231
232 const Manifest &manifest = reinterpret_cast<const Manifest&> (arabic_win1256_gsub_lookups.manifest);
233 static_assert (sizeof (arabic_win1256_gsub_lookups.manifestData) ==
234 ARABIC_FALLBACK_MAX_LOOKUPS5 * sizeof (ManifestLookup), "");
235 /* TODO sanitize the table? */
236
237 unsigned j = 0;
238 unsigned int count = manifest.len;
239 for (unsigned int i = 0; i < count; i++)
240 {
241 fallback_plan->mask_array[j] = plan->map.get_1_mask (manifest[i].tag);
242 if (fallback_plan->mask_array[j])
243 {
244 fallback_plan->lookup_array[j] = const_cast<OT::SubstLookup*> (&(&manifest+manifest[i].lookupOffset));
245 if (fallback_plan->lookup_array[j])
246 {
247 fallback_plan->accel_array[j].init (*fallback_plan->lookup_array[j]);
248 j++;
249 }
250 }
251 }
252
253 fallback_plan->num_lookups = j;
254 fallback_plan->free_lookups = false;
255
256 return j > 0;
257#else
258 return false;
259#endif
260}
261
262static bool
263arabic_fallback_plan_init_unicode (arabic_fallback_plan_t *fallback_plan,
264 const hb_ot_shape_plan_t *plan,
265 hb_font_t *font)
266{
267 static_assert ((ARRAY_LENGTH_CONST(arabic_fallback_features)((signed int) (sizeof (arabic_fallback_features) / sizeof (arabic_fallback_features
[0]))) <= ARABIC_FALLBACK_MAX_LOOKUPS5), "");
268 unsigned int j = 0;
269 for (unsigned int i = 0; i < ARRAY_LENGTH(arabic_fallback_features) ; i++)
270 {
271 fallback_plan->mask_array[j] = plan->map.get_1_mask (arabic_fallback_features[i]);
272 if (fallback_plan->mask_array[j])
273 {
274 fallback_plan->lookup_array[j] = arabic_fallback_synthesize_lookup (plan, font, i);
275 if (fallback_plan->lookup_array[j])
276 {
277 fallback_plan->accel_array[j].init (*fallback_plan->lookup_array[j]);
278 j++;
279 }
280 }
281 }
282
283 fallback_plan->num_lookups = j;
284 fallback_plan->free_lookups = true;
285
286 return j > 0;
287}
288
289static arabic_fallback_plan_t *
290arabic_fallback_plan_create (const hb_ot_shape_plan_t *plan,
291 hb_font_t *font)
292{
293 arabic_fallback_plan_t *fallback_plan = (arabic_fallback_plan_t *) calloc (1, sizeof (arabic_fallback_plan_t));
294 if (unlikely (!fallback_plan)(__builtin_expect (!!(!fallback_plan), 0)))
295 return const_cast<arabic_fallback_plan_t *> (&Null (arabic_fallback_plan_t)NullHelper<arabic_fallback_plan_t>::get_null ());
296
297 fallback_plan->num_lookups = 0;
298 fallback_plan->free_lookups = false;
299
300 /* Try synthesizing GSUB table using Unicode Arabic Presentation Forms,
301 * in case the font has cmap entries for the presentation-forms characters. */
302 if (arabic_fallback_plan_init_unicode (fallback_plan, plan, font))
303 return fallback_plan;
304
305 /* See if this looks like a Windows-1256-encoded font. If it does, use a
306 * hand-coded GSUB table. */
307 if (arabic_fallback_plan_init_win1256 (fallback_plan, plan, font))
308 return fallback_plan;
309
310 assert (fallback_plan->num_lookups == 0)(static_cast <bool> (fallback_plan->num_lookups == 0
) ? void (0) : __assert_fail ("fallback_plan->num_lookups == 0"
, "/home/daniel/Projects/java/jdk/src/java.desktop/share/native/libharfbuzz/hb-ot-shape-complex-arabic-fallback.hh"
, 310, __extension__ __PRETTY_FUNCTION__));
311 free (fallback_plan);
312 return const_cast<arabic_fallback_plan_t *> (&Null (arabic_fallback_plan_t)NullHelper<arabic_fallback_plan_t>::get_null ());
313}
314
315static void
316arabic_fallback_plan_destroy (arabic_fallback_plan_t *fallback_plan)
317{
318 if (!fallback_plan
7.1
'fallback_plan' is non-null
7.1
'fallback_plan' is non-null
 || fallback_plan->num_lookups == 0)
8
←
Assuming field 'num_lookups' is not equal to 0
→
9
←
Taking false branch
→
319 return;
320
321 for (unsigned int i = 0; i
9.1
'i' is < field 'num_lookups'
9.1
'i' is < field 'num_lookups'
 < fallback_plan->num_lookups; i++)
10
←
Loop condition is true. Entering loop body
→
13
←
Assuming 'i' is >= field 'num_lookups'
→
14
←
Loop condition is false. Execution continues on line 329
→
322 if (fallback_plan->lookup_array[i])
11
←
Assuming the condition is false
→
12
←
Taking false branch
→
323 {
324 fallback_plan->accel_array[i].fini ();
325 if (fallback_plan->free_lookups)
326 free (fallback_plan->lookup_array[i]);
327 }
328
329 free (fallback_plan);
15
←
Argument to free() is the address of the global variable '_hb_NullPool', which is not memory allocated by malloc()
330}
331
332static void
333arabic_fallback_plan_shape (arabic_fallback_plan_t *fallback_plan,
334 hb_font_t *font,
335 hb_buffer_t *buffer)
336{
337 OT::hb_ot_apply_context_t c (0, font, buffer);
338 for (unsigned int i = 0; i < fallback_plan->num_lookups; i++)
339 if (fallback_plan->lookup_array[i]) {
340 c.set_lookup_mask (fallback_plan->mask_array[i]);
341 hb_ot_layout_substitute_lookup (&c,
342 *fallback_plan->lookup_array[i],
343 fallback_plan->accel_array[i]);
344 }
345}
346
347
348#endif /* HB_OT_SHAPE_COMPLEX_ARABIC_FALLBACK_HH */