From e2edac0ed84ec187812ec48b16c9b46dd59afc8d Mon Sep 17 00:00:00 2001 From: Peter Breitenlohner Date: Wed, 5 Dec 2012 10:49:08 +0000 Subject: libs/harfbuzz 0.9.8 git-svn-id: svn://tug.org/texlive/trunk@28449 c570f23f-e606-0410-a88d-b1316a301751 --- .../harfbuzz/harfbuzz-0.9.8/src/hb-set-private.hh | 305 +++++++++++++++++++++ 1 file changed, 305 insertions(+) create mode 100644 Build/source/libs/harfbuzz/harfbuzz-0.9.8/src/hb-set-private.hh (limited to 'Build/source/libs/harfbuzz/harfbuzz-0.9.8/src/hb-set-private.hh') diff --git a/Build/source/libs/harfbuzz/harfbuzz-0.9.8/src/hb-set-private.hh b/Build/source/libs/harfbuzz/harfbuzz-0.9.8/src/hb-set-private.hh new file mode 100644 index 00000000000..c736b69936c --- /dev/null +++ b/Build/source/libs/harfbuzz/harfbuzz-0.9.8/src/hb-set-private.hh @@ -0,0 +1,305 @@ +/* + * Copyright © 2012 Google, 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. + * + * Google Author(s): Behdad Esfahbod + */ + +#ifndef HB_SET_PRIVATE_HH +#define HB_SET_PRIVATE_HH + +#include "hb-private.hh" +#include "hb-set.h" +#include "hb-object-private.hh" + + +struct hb_set_digest_common_bits_t +{ + ASSERT_POD (); + + typedef unsigned int mask_t; + + inline void init (void) { + mask = ~0; + value = (mask_t) -1; + } + + inline void add (hb_codepoint_t g) { + if (unlikely (value == (mask_t) -1)) { + value = g; + return; + } + + mask ^= (g & mask) ^ value; + value &= mask; + } + + inline void add_range (hb_codepoint_t a, hb_codepoint_t b) { + /* The negation here stands for ~(x-1). */ + mask &= -(1 << _hb_bit_storage (a ^ b)); + value &= mask; + } + + inline bool may_have (hb_codepoint_t g) const { + return (g & mask) == value; + } + + private: + mask_t mask; + mask_t value; +}; + +struct hb_set_digest_lowest_bits_t +{ + ASSERT_POD (); + + typedef unsigned long mask_t; + + inline void init (void) { + mask = 0; + } + + inline void add (hb_codepoint_t g) { + mask |= mask_for (g); + } + + inline void add_range (hb_codepoint_t a, hb_codepoint_t b) { + if (b - a >= sizeof (mask_t) * 8 - 1) + mask = (mask_t) -1; + else { + mask_t ma = mask_for (a); + mask_t mb = mask_for (b); + mask |= mb + (mb - ma) - (mb < ma); + } + } + + inline bool may_have (hb_codepoint_t g) const { + return !!(mask & mask_for (g)); + } + + private: + + static inline mask_t mask_for (hb_codepoint_t g) { return ((mask_t) 1) << (g & (sizeof (mask_t) * 8 - 1)); } + mask_t mask; +}; + +struct hb_set_digest_t +{ + ASSERT_POD (); + + inline void init (void) { + digest1.init (); + digest2.init (); + } + + inline void add (hb_codepoint_t g) { + digest1.add (g); + digest2.add (g); + } + + inline void add_range (hb_codepoint_t a, hb_codepoint_t b) { + digest1.add_range (a, b); + digest2.add_range (a, b); + } + + inline bool may_have (hb_codepoint_t g) const { + return digest1.may_have (g) && digest2.may_have (g); + } + + private: + hb_set_digest_common_bits_t digest1; + hb_set_digest_lowest_bits_t digest2; +}; + + +/* TODO Make this faster and memmory efficient. */ + +struct hb_set_t +{ + hb_object_header_t header; + ASSERT_POD (); + + inline void init (void) { + header.init (); + clear (); + } + inline void fini (void) { + } + inline void clear (void) { + memset (elts, 0, sizeof elts); + } + inline bool is_empty (void) const { + for (unsigned int i = 0; i < ARRAY_LENGTH (elts); i++) + if (elts[i]) + return false; + return true; + } + inline void add (hb_codepoint_t g) + { + if (unlikely (g == SENTINEL)) return; + if (unlikely (g > MAX_G)) return; + elt (g) |= mask (g); + } + inline void add_range (hb_codepoint_t a, hb_codepoint_t b) + { + /* TODO Speedup */ + for (unsigned int i = a; i < b + 1; i++) + add (i); + } + inline void del (hb_codepoint_t g) + { + if (unlikely (g > MAX_G)) return; + elt (g) &= ~mask (g); + } + inline void del_range (hb_codepoint_t a, hb_codepoint_t b) + { + /* TODO Speedup */ + for (unsigned int i = a; i < b + 1; i++) + del (i); + } + inline bool has (hb_codepoint_t g) const + { + if (unlikely (g > MAX_G)) return false; + return !!(elt (g) & mask (g)); + } + inline bool intersects (hb_codepoint_t first, + hb_codepoint_t last) const + { + if (unlikely (first > MAX_G)) return false; + if (unlikely (last > MAX_G)) last = MAX_G; + unsigned int end = last + 1; + for (hb_codepoint_t i = first; i < end; i++) + if (has (i)) + return true; + return false; + } + inline bool is_equal (const hb_set_t *other) const + { + for (unsigned int i = 0; i < ELTS; i++) + if (elts[i] != other->elts[i]) + return false; + return true; + } + inline void set (const hb_set_t *other) + { + for (unsigned int i = 0; i < ELTS; i++) + elts[i] = other->elts[i]; + } + inline void union_ (const hb_set_t *other) + { + for (unsigned int i = 0; i < ELTS; i++) + elts[i] |= other->elts[i]; + } + inline void intersect (const hb_set_t *other) + { + for (unsigned int i = 0; i < ELTS; i++) + elts[i] &= other->elts[i]; + } + inline void subtract (const hb_set_t *other) + { + for (unsigned int i = 0; i < ELTS; i++) + elts[i] &= ~other->elts[i]; + } + inline void symmetric_difference (const hb_set_t *other) + { + for (unsigned int i = 0; i < ELTS; i++) + elts[i] ^= other->elts[i]; + } + inline bool next (hb_codepoint_t *codepoint) const + { + if (unlikely (*codepoint == SENTINEL)) { + hb_codepoint_t i = get_min (); + if (i != SENTINEL) { + *codepoint = i; + return true; + } else + return false; + } + for (hb_codepoint_t i = *codepoint + 1; i < MAX_G + 1; i++) + if (has (i)) { + *codepoint = i; + return true; + } + return false; + } + inline bool next_range (hb_codepoint_t *first, hb_codepoint_t *last) const + { + hb_codepoint_t i; + + i = *last; + if (!next (&i)) + return false; + + *last = *first = i; + while (next (&i) && i == *last + 1) + (*last)++; + + return true; + } + + inline unsigned int get_population (void) const + { + unsigned int count = 0; + for (unsigned int i = 0; i < ELTS; i++) + count += _hb_popcount32 (elts[i]); + return count; + } + inline hb_codepoint_t get_min (void) const + { + for (unsigned int i = 0; i < ELTS; i++) + if (elts[i]) + for (unsigned int j = 0; i < BITS; j++) + if (elts[i] & (1 << j)) + return i * BITS + j; + return SENTINEL; + } + inline hb_codepoint_t get_max (void) const + { + for (unsigned int i = ELTS; i; i--) + if (elts[i - 1]) + for (unsigned int j = BITS; j; j--) + if (elts[i - 1] & (1 << (j - 1))) + return (i - 1) * BITS + (j - 1); + return SENTINEL; + } + + typedef uint32_t elt_t; + static const unsigned int MAX_G = 65536 - 1; /* XXX Fix this... */ + static const unsigned int SHIFT = 5; + static const unsigned int BITS = (1 << SHIFT); + static const unsigned int MASK = BITS - 1; + static const unsigned int ELTS = (MAX_G + 1 + (BITS - 1)) / BITS; + static const hb_codepoint_t SENTINEL = (hb_codepoint_t) -1; + + elt_t &elt (hb_codepoint_t g) { return elts[g >> SHIFT]; } + elt_t elt (hb_codepoint_t g) const { return elts[g >> SHIFT]; } + elt_t mask (hb_codepoint_t g) const { return elt_t (1) << (g & MASK); } + + elt_t elts[ELTS]; /* XXX 8kb */ + + ASSERT_STATIC (sizeof (elt_t) * 8 == BITS); + ASSERT_STATIC (sizeof (elt_t) * 8 * ELTS > MAX_G); +}; + + + +#endif /* HB_SET_PRIVATE_HH */ -- cgit v1.2.3