hb-set-private.hh revision 2a99a7e74a7f215066514fe81d2bfa6639d9eddd
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Copyright © 2012 Google, Inc. 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * This is part of HarfBuzz, a text shaping library. 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Permission is hereby granted, without written agreement and without 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * license or royalty fees, to use, copy, modify, and distribute this 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * software and its documentation for any purpose, provided that the 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * above copyright notice and the following two paragraphs appear in 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * all copies of this software. 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * DAMAGE. 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Google Author(s): Behdad Esfahbod 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef HB_SET_PRIVATE_HH 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define HB_SET_PRIVATE_HH 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "hb-private.hh" 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "hb-set.h" 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "hb-object-private.hh" 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)struct hb_set_digest_common_bits_t 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ASSERT_POD (); 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) typedef unsigned int mask_t; 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline void init (void) { 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mask = ~0; 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) value = (mask_t) -1; 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline void add (hb_codepoint_t g) { 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (unlikely (value == (mask_t) -1)) { 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) value = g; 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mask ^= (g & mask) ^ value; 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) value &= mask; 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline void add_range (hb_codepoint_t a, hb_codepoint_t b) { 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* The negation here stands for ~(x-1). */ 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mask &= -(1 << _hb_bit_storage (a ^ b)); 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) value &= mask; 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline bool may_have (hb_codepoint_t g) const { 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return (g & mask) == value; 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mask_t mask; 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mask_t value; 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)struct hb_set_digest_lowest_bits_t 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ASSERT_POD (); 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) typedef unsigned long mask_t; 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline void init (void) { 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mask = 0; 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline void add (hb_codepoint_t g) { 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mask |= mask_for (g); 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline void add_range (hb_codepoint_t a, hb_codepoint_t b) { 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (b - a >= sizeof (mask_t) * 8 - 1) 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mask = (mask_t) -1; 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) else { 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mask_t ma = mask_for (a); 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mask_t mb = mask_for (b); 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mask |= mb + (mb - ma) - (mb < ma); 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline bool may_have (hb_codepoint_t g) const { 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return !!(mask & mask_for (g)); 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1012a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) static inline mask_t mask_for (hb_codepoint_t g) { return ((mask_t) 1) << (g & (sizeof (mask_t) * 8 - 1)); } 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mask_t mask; 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)struct hb_set_digest_t 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ASSERT_POD (); 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline void init (void) { 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) digest1.init (); 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) digest2.init (); 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline void add (hb_codepoint_t g) { 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) digest1.add (g); 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) digest2.add (g); 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline void add_range (hb_codepoint_t a, hb_codepoint_t b) { 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) digest1.add_range (a, b); 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) digest2.add_range (a, b); 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline bool may_have (hb_codepoint_t g) const { 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return digest1.may_have (g) && digest2.may_have (g); 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) hb_set_digest_common_bits_t digest1; 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) hb_set_digest_lowest_bits_t digest2; 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* TODO Make this faster and memmory efficient. */ 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)struct hb_set_t 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) hb_object_header_t header; 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ASSERT_POD (); 1402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) bool in_error; 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline void init (void) { 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) header.init (); 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) clear (); 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline void fini (void) { 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline void clear (void) { 1492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (unlikely (hb_object_is_inert (this))) 1502a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return; 1512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) in_error = false; 1525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memset (elts, 0, sizeof elts); 1535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) inline bool is_empty (void) const { 1555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (unsigned int i = 0; i < ARRAY_LENGTH (elts); i++) 1565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (elts[i]) 1575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 1585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 1595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline void add (hb_codepoint_t g) 1615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 1622a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (unlikely (in_error)) return; 1635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (unlikely (g == SENTINEL)) return; 1645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (unlikely (g > MAX_G)) return; 1655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) elt (g) |= mask (g); 1665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline void add_range (hb_codepoint_t a, hb_codepoint_t b) 1685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 1692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (unlikely (in_error)) return; 1702a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) /* TODO Speedup */ 1715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (unsigned int i = a; i < b + 1; i++) 1725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) add (i); 1735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline void del (hb_codepoint_t g) 1755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 1762a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (unlikely (in_error)) return; 1775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (unlikely (g > MAX_G)) return; 1785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) elt (g) &= ~mask (g); 1795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1802a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) inline void del_range (hb_codepoint_t a, hb_codepoint_t b) 1812a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) { 1822a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (unlikely (in_error)) return; 1832a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) /* TODO Speedup */ 1842a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) for (unsigned int i = a; i < b + 1; i++) 1852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) del (i); 1862a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 1875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline bool has (hb_codepoint_t g) const 1885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 1895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (unlikely (g > MAX_G)) return false; 1905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return !!(elt (g) & mask (g)); 1915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline bool intersects (hb_codepoint_t first, 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) hb_codepoint_t last) const 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (unlikely (first > MAX_G)) return false; 1965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (unlikely (last > MAX_G)) last = MAX_G; 1975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) unsigned int end = last + 1; 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (hb_codepoint_t i = first; i < end; i++) 1995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (has (i)) 2005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 2015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2032a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) inline bool is_equal (const hb_set_t *other) const 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 2055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (unsigned int i = 0; i < ELTS; i++) 2065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (elts[i] != other->elts[i]) 2075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 2085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 2095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline void set (const hb_set_t *other) 2115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 2122a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (unlikely (in_error)) return; 2135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (unsigned int i = 0; i < ELTS; i++) 2145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) elts[i] = other->elts[i]; 2155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline void union_ (const hb_set_t *other) 2175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 2182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (unlikely (in_error)) return; 2195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (unsigned int i = 0; i < ELTS; i++) 2205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) elts[i] |= other->elts[i]; 2215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline void intersect (const hb_set_t *other) 2235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 2242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (unlikely (in_error)) return; 2255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (unsigned int i = 0; i < ELTS; i++) 2265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) elts[i] &= other->elts[i]; 2275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline void subtract (const hb_set_t *other) 2295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 2302a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (unlikely (in_error)) return; 2315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (unsigned int i = 0; i < ELTS; i++) 2325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) elts[i] &= ~other->elts[i]; 2335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline void symmetric_difference (const hb_set_t *other) 2355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 2362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (unlikely (in_error)) return; 2375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (unsigned int i = 0; i < ELTS; i++) 2385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) elts[i] ^= other->elts[i]; 2395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) inline void invert (void) 2412a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) { 2422a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (unlikely (in_error)) return; 2432a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) for (unsigned int i = 0; i < ELTS; i++) 2442a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) elts[i] = ~elts[i]; 2452a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 2462a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) inline bool next (hb_codepoint_t *codepoint) const 2475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 2485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (unlikely (*codepoint == SENTINEL)) { 2495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) hb_codepoint_t i = get_min (); 2505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (i != SENTINEL) { 2515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *codepoint = i; 2525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 2535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else 2545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 2555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (hb_codepoint_t i = *codepoint + 1; i < MAX_G + 1; i++) 2575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (has (i)) { 2585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *codepoint = i; 2595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 2605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 2625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2632a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) inline bool next_range (hb_codepoint_t *first, hb_codepoint_t *last) const 2642a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) { 2652a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) hb_codepoint_t i; 2662a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2672a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) i = *last; 2682a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (!next (&i)) 2692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return false; 2702a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2712a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) *last = *first = i; 2722a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) while (next (&i) && i == *last + 1) 2732a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) (*last)++; 2742a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2752a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return true; 2762a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 2772a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2782a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) inline unsigned int get_population (void) const 2792a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) { 2802a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned int count = 0; 2812a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) for (unsigned int i = 0; i < ELTS; i++) 2822a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) count += _hb_popcount32 (elts[i]); 2832a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return count; 2842a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 2855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline hb_codepoint_t get_min (void) const 2865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 2875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (unsigned int i = 0; i < ELTS; i++) 2885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (elts[i]) 2895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (unsigned int j = 0; i < BITS; j++) 2905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (elts[i] & (1 << j)) 2915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return i * BITS + j; 2925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return SENTINEL; 2935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline hb_codepoint_t get_max (void) const 2955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 2965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (unsigned int i = ELTS; i; i--) 2975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (elts[i - 1]) 2985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (unsigned int j = BITS; j; j--) 2995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (elts[i - 1] & (1 << (j - 1))) 3005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return (i - 1) * BITS + (j - 1); 3015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return SENTINEL; 3025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) typedef uint32_t elt_t; 3055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static const unsigned int MAX_G = 65536 - 1; /* XXX Fix this... */ 3065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static const unsigned int SHIFT = 5; 3075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static const unsigned int BITS = (1 << SHIFT); 3085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static const unsigned int MASK = BITS - 1; 3095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static const unsigned int ELTS = (MAX_G + 1 + (BITS - 1)) / BITS; 3105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static const hb_codepoint_t SENTINEL = (hb_codepoint_t) -1; 3115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) elt_t &elt (hb_codepoint_t g) { return elts[g >> SHIFT]; } 3135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) elt_t elt (hb_codepoint_t g) const { return elts[g >> SHIFT]; } 3145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) elt_t mask (hb_codepoint_t g) const { return elt_t (1) << (g & MASK); } 3155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) elt_t elts[ELTS]; /* XXX 8kb */ 3175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ASSERT_STATIC (sizeof (elt_t) * 8 == BITS); 3195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ASSERT_STATIC (sizeof (elt_t) * 8 * ELTS > MAX_G); 3205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 3215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif /* HB_SET_PRIVATE_HH */ 325