hb-private.hh revision 153142dac8dd9abaf164bb88af07c600c17fc3a1
164aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod/* 22409d5f8d7dd8b535ce5ea29e933f7db27d33793Behdad Esfahbod * Copyright © 2007,2008,2009 Red Hat, Inc. 32409d5f8d7dd8b535ce5ea29e933f7db27d33793Behdad Esfahbod * Copyright © 2011 Google, Inc. 464aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * 5c755cb3e3ac55156d0d2ec05adea7a650b97cc41Behdad Esfahbod * This is part of HarfBuzz, a text shaping library. 664aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * 764aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * Permission is hereby granted, without written agreement and without 864aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * license or royalty fees, to use, copy, modify, and distribute this 964aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * software and its documentation for any purpose, provided that the 1064aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * above copyright notice and the following two paragraphs appear in 1164aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * all copies of this software. 1264aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * 1364aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 1464aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 1564aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 1664aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 1764aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * DAMAGE. 1864aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * 1964aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 2064aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 2164aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 2264aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 2364aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 2464aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * 2564aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod * Red Hat Author(s): Behdad Esfahbod 262409d5f8d7dd8b535ce5ea29e933f7db27d33793Behdad Esfahbod * Google Author(s): Behdad Esfahbod 2764aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod */ 2864aef3a54999496fd1de4f5aa5b019e4c03b3836Behdad Esfahbod 29c57d454accff66e5f2c58006e8fb40bc020b6182Behdad Esfahbod#ifndef HB_PRIVATE_HH 30c57d454accff66e5f2c58006e8fb40bc020b6182Behdad Esfahbod#define HB_PRIVATE_HH 315b3f7702a64fe0513d08a67bdb72704e46fd7cd4Behdad Esfahbod 32df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#if HAVE_CONFIG_H 33df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#include "config.h" 34df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#endif 35c7d457aa3ae7138630f52ca7263f663a3ea284c0Behdad Esfahbod 36bc200457430c083914a64bf4b056153506749610Behdad Esfahbod#include "hb-common.h" 37b28815c1f6e46d38471cacbc31248ca6fda8c4d1Behdad Esfahbod 38c7d457aa3ae7138630f52ca7263f663a3ea284c0Behdad Esfahbod#include <stdlib.h> 39f0954d1e08ae288eda9904e17108fc73f48c0b98Behdad Esfahbod#include <string.h> 40f0954d1e08ae288eda9904e17108fc73f48c0b98Behdad Esfahbod#include <assert.h> 411d52151a19ed8ec776276aac5cc6ce3769e0d947Behdad Esfahbod 421d52151a19ed8ec776276aac5cc6ce3769e0d947Behdad Esfahbod/* We only use these two for debug output. However, the debug code is 431d52151a19ed8ec776276aac5cc6ce3769e0d947Behdad Esfahbod * always seen by the compiler (and optimized out in non-debug builds. 441d52151a19ed8ec776276aac5cc6ce3769e0d947Behdad Esfahbod * If including these becomes a problem, we can start thinking about 451d52151a19ed8ec776276aac5cc6ce3769e0d947Behdad Esfahbod * someway around that. */ 467acb389569cf99c6bae9db31a8ed7c7007fbb566Behdad Esfahbod#include <stdio.h> 477acb389569cf99c6bae9db31a8ed7c7007fbb566Behdad Esfahbod#include <errno.h> 48c7d457aa3ae7138630f52ca7263f663a3ea284c0Behdad Esfahbod 49acdba3f90b232fc12fcb200dca2584481b339118Behdad EsfahbodHB_BEGIN_DECLS 50acdba3f90b232fc12fcb200dca2584481b339118Behdad Esfahbod 51bc200457430c083914a64bf4b056153506749610Behdad Esfahbod 52bc200457430c083914a64bf4b056153506749610Behdad Esfahbod/* Essentials */ 53bc200457430c083914a64bf4b056153506749610Behdad Esfahbod 54bc200457430c083914a64bf4b056153506749610Behdad Esfahbod#ifndef NULL 55bc200457430c083914a64bf4b056153506749610Behdad Esfahbod# define NULL ((void *) 0) 56bc200457430c083914a64bf4b056153506749610Behdad Esfahbod#endif 57bc200457430c083914a64bf4b056153506749610Behdad Esfahbod 58bc200457430c083914a64bf4b056153506749610Behdad Esfahbod#undef FALSE 59bc200457430c083914a64bf4b056153506749610Behdad Esfahbod#define FALSE 0 60bc200457430c083914a64bf4b056153506749610Behdad Esfahbod 61bc200457430c083914a64bf4b056153506749610Behdad Esfahbod#undef TRUE 62bc200457430c083914a64bf4b056153506749610Behdad Esfahbod#define TRUE 1 63df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod 64a794ebf4be9896393f4badf02905a4007981a588Behdad Esfahbod 65c7d457aa3ae7138630f52ca7263f663a3ea284c0Behdad Esfahbod/* Basics */ 66c7d457aa3ae7138630f52ca7263f663a3ea284c0Behdad Esfahbod 67153142dac8dd9abaf164bb88af07c600c17fc3a1Behdad EsfahbodHB_END_DECLS 68153142dac8dd9abaf164bb88af07c600c17fc3a1Behdad Esfahbod 69c7d457aa3ae7138630f52ca7263f663a3ea284c0Behdad Esfahbod#undef MIN 70153142dac8dd9abaf164bb88af07c600c17fc3a1Behdad Esfahbodtemplate <typename Type> static inline Type MIN (const Type &a, const Type &b) { return a < b ? a : b; } 717586089c6fa8185cad8387869d3703c637e5cbb1Behdad Esfahbod 728a3511ac6c795226699c2b36e03401ecdf88f5f8Behdad Esfahbod#undef MAX 73153142dac8dd9abaf164bb88af07c600c17fc3a1Behdad Esfahbodtemplate <typename Type> static inline Type MAX (const Type &a, const Type &b) { return a > b ? a : b; } 74153142dac8dd9abaf164bb88af07c600c17fc3a1Behdad Esfahbod 75153142dac8dd9abaf164bb88af07c600c17fc3a1Behdad EsfahbodHB_BEGIN_DECLS 768a3511ac6c795226699c2b36e03401ecdf88f5f8Behdad Esfahbod 774591753ad4b5ec0224e3f1befdfe4fc5f6075562Behdad Esfahbod#undef ARRAY_LENGTH 784591753ad4b5ec0224e3f1befdfe4fc5f6075562Behdad Esfahbod#define ARRAY_LENGTH(__array) ((signed int) (sizeof (__array) / sizeof (__array[0]))) 7912360f7c159826ae72271b34486dee59d96aa8caBehdad Esfahbod 8035a7383c6138fd705560f0d4bb30659cbd1ab64cBehdad Esfahbod#define HB_STMT_START do 8135a7383c6138fd705560f0d4bb30659cbd1ab64cBehdad Esfahbod#define HB_STMT_END while (0) 825b3f7702a64fe0513d08a67bdb72704e46fd7cd4Behdad Esfahbod 83303fe62824d4e99df554b6bfaacba05d068522fbBehdad Esfahbod#define _ASSERT_STATIC1(_line, _cond) typedef int _static_assert_on_line_##_line##_failed[(_cond)?1:-1] 84303fe62824d4e99df554b6bfaacba05d068522fbBehdad Esfahbod#define _ASSERT_STATIC0(_line, _cond) _ASSERT_STATIC1 (_line, (_cond)) 85303fe62824d4e99df554b6bfaacba05d068522fbBehdad Esfahbod#define ASSERT_STATIC(_cond) _ASSERT_STATIC0 (__LINE__, (_cond)) 86303fe62824d4e99df554b6bfaacba05d068522fbBehdad Esfahbod 87dcb7026f33cbcdf60e9b7fcdd44c64cc08702c74Behdad Esfahbod#define ASSERT_STATIC_EXPR(_cond) ((void) sizeof (char[(_cond) ? 1 : -1])) 88dcb7026f33cbcdf60e9b7fcdd44c64cc08702c74Behdad Esfahbod 89bc200457430c083914a64bf4b056153506749610Behdad Esfahbod 906fd5364bdc3a2b459175377e9e16c86cff054232Behdad Esfahbod/* Lets assert int types. Saves trouble down the road. */ 916fd5364bdc3a2b459175377e9e16c86cff054232Behdad Esfahbod 926fd5364bdc3a2b459175377e9e16c86cff054232Behdad EsfahbodASSERT_STATIC (sizeof (int8_t) == 1); 936fd5364bdc3a2b459175377e9e16c86cff054232Behdad EsfahbodASSERT_STATIC (sizeof (uint8_t) == 1); 946fd5364bdc3a2b459175377e9e16c86cff054232Behdad EsfahbodASSERT_STATIC (sizeof (int16_t) == 2); 956fd5364bdc3a2b459175377e9e16c86cff054232Behdad EsfahbodASSERT_STATIC (sizeof (uint16_t) == 2); 966fd5364bdc3a2b459175377e9e16c86cff054232Behdad EsfahbodASSERT_STATIC (sizeof (int32_t) == 4); 976fd5364bdc3a2b459175377e9e16c86cff054232Behdad EsfahbodASSERT_STATIC (sizeof (uint32_t) == 4); 986fd5364bdc3a2b459175377e9e16c86cff054232Behdad EsfahbodASSERT_STATIC (sizeof (int64_t) == 8); 996fd5364bdc3a2b459175377e9e16c86cff054232Behdad EsfahbodASSERT_STATIC (sizeof (uint64_t) == 8); 1006fd5364bdc3a2b459175377e9e16c86cff054232Behdad Esfahbod 101b13640de6992de9ee9d07e3581c33b8181b70ff9Behdad EsfahbodASSERT_STATIC (sizeof (hb_codepoint_t) == 4); 102b13640de6992de9ee9d07e3581c33b8181b70ff9Behdad EsfahbodASSERT_STATIC (sizeof (hb_position_t) == 4); 103b13640de6992de9ee9d07e3581c33b8181b70ff9Behdad EsfahbodASSERT_STATIC (sizeof (hb_mask_t) == 4); 104ae9eeaff9300f3bb7bed588c5478e8e5461b3df0Behdad EsfahbodASSERT_STATIC (sizeof (hb_var_int_t) == 4); 1056fd5364bdc3a2b459175377e9e16c86cff054232Behdad Esfahbod 106bc200457430c083914a64bf4b056153506749610Behdad Esfahbod/* Misc */ 107bc200457430c083914a64bf4b056153506749610Behdad Esfahbod 108c7d457aa3ae7138630f52ca7263f663a3ea284c0Behdad Esfahbod 109df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__) 110494d28ad988e505c1c45cc35a7ec6b880cfec5fcBehdad Esfahbod#define _HB_BOOLEAN_EXPR(expr) ((expr) ? 1 : 0) 11164d3fc8d0dada673245cc8c0b1c12cd849b30997Behdad Esfahbod#define likely(expr) (__builtin_expect (_HB_BOOLEAN_EXPR(expr), 1)) 11264d3fc8d0dada673245cc8c0b1c12cd849b30997Behdad Esfahbod#define unlikely(expr) (__builtin_expect (_HB_BOOLEAN_EXPR(expr), 0)) 113df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#else 11464d3fc8d0dada673245cc8c0b1c12cd849b30997Behdad Esfahbod#define likely(expr) (expr) 11564d3fc8d0dada673245cc8c0b1c12cd849b30997Behdad Esfahbod#define unlikely(expr) (expr) 116df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#endif 117df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod 118df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#ifndef __GNUC__ 119df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#undef __attribute__ 120df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#define __attribute__(x) 121df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#endif 122df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod 123df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#if __GNUC__ >= 3 12433d13fdda99acaeffa9600737e8870278d053ebeBehdad Esfahbod#define HB_PURE_FUNC __attribute__((pure)) 12533d13fdda99acaeffa9600737e8870278d053ebeBehdad Esfahbod#define HB_CONST_FUNC __attribute__((const)) 126df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#else 12733d13fdda99acaeffa9600737e8870278d053ebeBehdad Esfahbod#define HB_PURE_FUNC 12833d13fdda99acaeffa9600737e8870278d053ebeBehdad Esfahbod#define HB_CONST_FUNC 129df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#endif 130bc7830e4259755ce7549025c6f5bf750e78c2ff1Behdad Esfahbod#if __GNUC__ >= 4 13133d13fdda99acaeffa9600737e8870278d053ebeBehdad Esfahbod#define HB_UNUSED __attribute__((unused)) 132bc7830e4259755ce7549025c6f5bf750e78c2ff1Behdad Esfahbod#else 13333d13fdda99acaeffa9600737e8870278d053ebeBehdad Esfahbod#define HB_UNUSED 134bc7830e4259755ce7549025c6f5bf750e78c2ff1Behdad Esfahbod#endif 135df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod 136eee8598d75d3af692d9ececf7e8ac458e892ba9eBehdad Esfahbod#ifndef HB_INTERNAL 137357d0f29c431b842179ee4b56c21bcc402178ce7Behdad Esfahbod# define HB_INTERNAL __attribute__((__visibility__("hidden"))) 138eee8598d75d3af692d9ececf7e8ac458e892ba9eBehdad Esfahbod#endif 139eee8598d75d3af692d9ececf7e8ac458e892ba9eBehdad Esfahbod 140df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod 141df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#if (defined(__WIN32__) && !defined(__WINE__)) || defined(_MSC_VER) 142df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#define snprintf _snprintf 143df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#endif 144df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod 145df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#ifdef _MSC_VER 146df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#undef inline 147df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#define inline __inline 148df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#endif 149df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod 150df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#ifdef __STRICT_ANSI__ 151df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#undef inline 152df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#define inline __inline__ 153df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod#endif 154df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod 155df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod 1567d3a126334f8e6f6441561c1bb592bd3fa7a2c5cBehdad Esfahbod#if __GNUC__ >= 3 1577d3a126334f8e6f6441561c1bb592bd3fa7a2c5cBehdad Esfahbod#define HB_FUNC __PRETTY_FUNCTION__ 1587d3a126334f8e6f6441561c1bb592bd3fa7a2c5cBehdad Esfahbod#elif defined(_MSC_VER) 1597d3a126334f8e6f6441561c1bb592bd3fa7a2c5cBehdad Esfahbod#define HB_FUNC __FUNCSIG__ 1607d3a126334f8e6f6441561c1bb592bd3fa7a2c5cBehdad Esfahbod#else 1617d3a126334f8e6f6441561c1bb592bd3fa7a2c5cBehdad Esfahbod#define HB_FUNC __func__ 1627d3a126334f8e6f6441561c1bb592bd3fa7a2c5cBehdad Esfahbod#endif 1637d3a126334f8e6f6441561c1bb592bd3fa7a2c5cBehdad Esfahbod 1647d3a126334f8e6f6441561c1bb592bd3fa7a2c5cBehdad Esfahbod 1659b6023338530a2dbb8214eb4391ef3e8372f3892Behdad Esfahbod/* Return the number of 1 bits in mask. */ 16697e7f8f305c47caf2968a9da3b8407825547286dBehdad Esfahbodstatic inline HB_CONST_FUNC unsigned int 167c7d457aa3ae7138630f52ca7263f663a3ea284c0Behdad Esfahbod_hb_popcount32 (uint32_t mask) 168c7d457aa3ae7138630f52ca7263f663a3ea284c0Behdad Esfahbod{ 169c7d457aa3ae7138630f52ca7263f663a3ea284c0Behdad Esfahbod#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) 1709b6023338530a2dbb8214eb4391ef3e8372f3892Behdad Esfahbod return __builtin_popcount (mask); 171c7d457aa3ae7138630f52ca7263f663a3ea284c0Behdad Esfahbod#else 1729b6023338530a2dbb8214eb4391ef3e8372f3892Behdad Esfahbod /* "HACKMEM 169" */ 1739b6023338530a2dbb8214eb4391ef3e8372f3892Behdad Esfahbod register uint32_t y; 1749b6023338530a2dbb8214eb4391ef3e8372f3892Behdad Esfahbod y = (mask >> 1) &033333333333; 1759b6023338530a2dbb8214eb4391ef3e8372f3892Behdad Esfahbod y = mask - y - ((y >>1) & 033333333333); 1769b6023338530a2dbb8214eb4391ef3e8372f3892Behdad Esfahbod return (((y + (y >> 3)) & 030707070707) % 077); 177c7d457aa3ae7138630f52ca7263f663a3ea284c0Behdad Esfahbod#endif 178c7d457aa3ae7138630f52ca7263f663a3ea284c0Behdad Esfahbod} 179c7d457aa3ae7138630f52ca7263f663a3ea284c0Behdad Esfahbod 1809b6023338530a2dbb8214eb4391ef3e8372f3892Behdad Esfahbod/* Returns the number of bits needed to store number */ 1819b6023338530a2dbb8214eb4391ef3e8372f3892Behdad Esfahbodstatic inline HB_CONST_FUNC unsigned int 1829b6023338530a2dbb8214eb4391ef3e8372f3892Behdad Esfahbod_hb_bit_storage (unsigned int number) 1839b6023338530a2dbb8214eb4391ef3e8372f3892Behdad Esfahbod{ 1849b6023338530a2dbb8214eb4391ef3e8372f3892Behdad Esfahbod#if defined(__GNUC__) && (__GNUC__ >= 4) && defined(__OPTIMIZE__) 185f7acd8df5146155b51d6f50aeb04f54f3030c1c3Behdad Esfahbod return likely (number) ? (sizeof (unsigned int) * 8 - __builtin_clz (number)) : 0; 1869b6023338530a2dbb8214eb4391ef3e8372f3892Behdad Esfahbod#else 1879b6023338530a2dbb8214eb4391ef3e8372f3892Behdad Esfahbod register unsigned int n_bits = 0; 1889b6023338530a2dbb8214eb4391ef3e8372f3892Behdad Esfahbod while (number) { 1899b6023338530a2dbb8214eb4391ef3e8372f3892Behdad Esfahbod n_bits++; 1909b6023338530a2dbb8214eb4391ef3e8372f3892Behdad Esfahbod number >>= 1; 1919b6023338530a2dbb8214eb4391ef3e8372f3892Behdad Esfahbod } 1929b6023338530a2dbb8214eb4391ef3e8372f3892Behdad Esfahbod return n_bits; 1939b6023338530a2dbb8214eb4391ef3e8372f3892Behdad Esfahbod#endif 1949b6023338530a2dbb8214eb4391ef3e8372f3892Behdad Esfahbod} 195df66028781a7609a515980e64396e6f1044d764aBehdad Esfahbod 196f7acd8df5146155b51d6f50aeb04f54f3030c1c3Behdad Esfahbod/* Returns the number of zero bits in the least significant side of number */ 197f7acd8df5146155b51d6f50aeb04f54f3030c1c3Behdad Esfahbodstatic inline HB_CONST_FUNC unsigned int 198f7acd8df5146155b51d6f50aeb04f54f3030c1c3Behdad Esfahbod_hb_ctz (unsigned int number) 199f7acd8df5146155b51d6f50aeb04f54f3030c1c3Behdad Esfahbod{ 200f7acd8df5146155b51d6f50aeb04f54f3030c1c3Behdad Esfahbod#if defined(__GNUC__) && (__GNUC__ >= 4) && defined(__OPTIMIZE__) 201f7acd8df5146155b51d6f50aeb04f54f3030c1c3Behdad Esfahbod return likely (number) ? __builtin_ctz (number) : 0; 202f7acd8df5146155b51d6f50aeb04f54f3030c1c3Behdad Esfahbod#else 203f7acd8df5146155b51d6f50aeb04f54f3030c1c3Behdad Esfahbod register unsigned int n_bits = 0; 204f7acd8df5146155b51d6f50aeb04f54f3030c1c3Behdad Esfahbod if (unlikely (!number)) return 0; 205f7acd8df5146155b51d6f50aeb04f54f3030c1c3Behdad Esfahbod while (!(number & 1)) { 206f7acd8df5146155b51d6f50aeb04f54f3030c1c3Behdad Esfahbod n_bits++; 207f7acd8df5146155b51d6f50aeb04f54f3030c1c3Behdad Esfahbod number >>= 1; 208f7acd8df5146155b51d6f50aeb04f54f3030c1c3Behdad Esfahbod } 209f7acd8df5146155b51d6f50aeb04f54f3030c1c3Behdad Esfahbod return n_bits; 210f7acd8df5146155b51d6f50aeb04f54f3030c1c3Behdad Esfahbod#endif 211f7acd8df5146155b51d6f50aeb04f54f3030c1c3Behdad Esfahbod} 212f7acd8df5146155b51d6f50aeb04f54f3030c1c3Behdad Esfahbod 2138f08c3275040870a645ef034a38d30c05c619f21Behdad Esfahbod/* Type of bsearch() / qsort() compare function */ 2148f08c3275040870a645ef034a38d30c05c619f21Behdad Esfahbodtypedef int (*hb_compare_func_t) (const void *, const void *); 2158f08c3275040870a645ef034a38d30c05c619f21Behdad Esfahbod 2168f08c3275040870a645ef034a38d30c05c619f21Behdad Esfahbod 217f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod/* We need external help for these */ 218f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod 219f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod#ifdef HAVE_GLIB 220f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod 221f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod#include <glib.h> 222f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod 2233e8bdbf9414291da5cf61213d5f4275c1ae23ae5Behdad Esfahbodtypedef volatile int hb_atomic_int_t; 224f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod#define hb_atomic_int_fetch_and_add(AI, V) g_atomic_int_exchange_and_add (&(AI), V) 225f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod#define hb_atomic_int_get(AI) g_atomic_int_get (&(AI)) 226f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod#define hb_atomic_int_set(AI, V) g_atomic_int_set (&(AI), V) 227f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod 228f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbodtypedef GStaticMutex hb_mutex_t; 229f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod#define HB_MUTEX_INIT G_STATIC_MUTEX_INIT 230f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod#define hb_mutex_init(M) g_static_mutex_init (&M) 231f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod#define hb_mutex_lock(M) g_static_mutex_lock (&M) 232f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod#define hb_mutex_trylock(M) g_static_mutex_trylock (&M) 233f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod#define hb_mutex_unlock(M) g_static_mutex_unlock (&M) 234f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod 235f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod#else 236f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod 237f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod#ifdef _MSC_VER 238ae9eeaff9300f3bb7bed588c5478e8e5461b3df0Behdad Esfahbod#define _HB__STR2__(x) #x 239ae9eeaff9300f3bb7bed588c5478e8e5461b3df0Behdad Esfahbod#define _HB__STR1__(x) _HB__STR2__(x) 240ae9eeaff9300f3bb7bed588c5478e8e5461b3df0Behdad Esfahbod#define _HB__LOC__ __FILE__ "("_HB__STR1__(__LINE__)") : Warning Msg: " 24182438c6ad5f60b6afc75c48cef72e18bef532468Bradley Grainger#pragma message(_HB__LOC__"Could not find any system to define platform macros, library will NOT be thread-safe") 242f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod#else 243f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod#warning "Could not find any system to define platform macros, library will NOT be thread-safe" 244f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod#endif 245f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod 2463e8bdbf9414291da5cf61213d5f4275c1ae23ae5Behdad Esfahbodtypedef volatile int hb_atomic_int_t; 247f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod#define hb_atomic_int_fetch_and_add(AI, V) ((AI) += (V), (AI) - (V)) 248f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod#define hb_atomic_int_get(AI) (AI) 249ffff7dc44cb2a35a60f92831165e9d3c3a61ce19Behdad Esfahbod#define hb_atomic_int_set(AI, V) HB_STMT_START { (AI) = (V); } HB_STMT_END 250f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod 2513e8bdbf9414291da5cf61213d5f4275c1ae23ae5Behdad Esfahbodtypedef volatile int hb_mutex_t; 252ffff7dc44cb2a35a60f92831165e9d3c3a61ce19Behdad Esfahbod#define HB_MUTEX_INIT 0 253ffff7dc44cb2a35a60f92831165e9d3c3a61ce19Behdad Esfahbod#define hb_mutex_init(M) HB_STMT_START { (M) = 0; } HB_STMT_END 254ffff7dc44cb2a35a60f92831165e9d3c3a61ce19Behdad Esfahbod#define hb_mutex_lock(M) HB_STMT_START { (M) = 1; } HB_STMT_END 255ffff7dc44cb2a35a60f92831165e9d3c3a61ce19Behdad Esfahbod#define hb_mutex_trylock(M) ((M) = 1, 1) 256ffff7dc44cb2a35a60f92831165e9d3c3a61ce19Behdad Esfahbod#define hb_mutex_unlock(M) HB_STMT_START { (M) = 0; } HB_STMT_END 257f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod 258f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod#endif 259f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod 260f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod 261a9f24c802956d57180d71b83e96a0fb81197df4aBehdad Esfahbod/* A reference count */ 262a9f24c802956d57180d71b83e96a0fb81197df4aBehdad Esfahbod 263a9f24c802956d57180d71b83e96a0fb81197df4aBehdad Esfahbodtypedef struct { 264a9f24c802956d57180d71b83e96a0fb81197df4aBehdad Esfahbod hb_atomic_int_t ref_count; 265a9f24c802956d57180d71b83e96a0fb81197df4aBehdad Esfahbod 266a9f24c802956d57180d71b83e96a0fb81197df4aBehdad Esfahbod#define HB_REFERENCE_COUNT_INVALID_VALUE ((hb_atomic_int_t) -1) 267a9f24c802956d57180d71b83e96a0fb81197df4aBehdad Esfahbod#define HB_REFERENCE_COUNT_INVALID {HB_REFERENCE_COUNT_INVALID_VALUE} 268a9f24c802956d57180d71b83e96a0fb81197df4aBehdad Esfahbod 269a9f24c802956d57180d71b83e96a0fb81197df4aBehdad Esfahbod inline void init (int v) { ref_count = v; /* non-atomic is fine */ } 270a9f24c802956d57180d71b83e96a0fb81197df4aBehdad Esfahbod inline int inc (void) { return hb_atomic_int_fetch_and_add (ref_count, 1); } 271a9f24c802956d57180d71b83e96a0fb81197df4aBehdad Esfahbod inline int dec (void) { return hb_atomic_int_fetch_and_add (ref_count, -1); } 272ebdc83467c31574daa118fc18cd2ef2dc819b503Behdad Esfahbod inline void set (int v) { hb_atomic_int_set (ref_count, v); } 273a9f24c802956d57180d71b83e96a0fb81197df4aBehdad Esfahbod 274a9f24c802956d57180d71b83e96a0fb81197df4aBehdad Esfahbod inline int get (void) const { return hb_atomic_int_get (ref_count); } 275a9f24c802956d57180d71b83e96a0fb81197df4aBehdad Esfahbod inline bool is_invalid (void) const { return get () == HB_REFERENCE_COUNT_INVALID_VALUE; } 276a9f24c802956d57180d71b83e96a0fb81197df4aBehdad Esfahbod 277a9f24c802956d57180d71b83e96a0fb81197df4aBehdad Esfahbod} hb_reference_count_t; 278a9f24c802956d57180d71b83e96a0fb81197df4aBehdad Esfahbod 279a9f24c802956d57180d71b83e96a0fb81197df4aBehdad Esfahbod 280f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod/* Big-endian handling */ 281f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod 282153142dac8dd9abaf164bb88af07c600c17fc3a1Behdad Esfahbodstatic inline uint16_t hb_be_uint16 (const uint16_t v) 283153142dac8dd9abaf164bb88af07c600c17fc3a1Behdad Esfahbod{ 284153142dac8dd9abaf164bb88af07c600c17fc3a1Behdad Esfahbod const uint8_t *V = (const uint8_t *) &v; 285153142dac8dd9abaf164bb88af07c600c17fc3a1Behdad Esfahbod return (uint16_t) (V[0] << 8) + V[1]; 286153142dac8dd9abaf164bb88af07c600c17fc3a1Behdad Esfahbod} 2877a52f281178867379adb6e6c6fb0022102f75d17Behdad Esfahbod 288e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbod#define hb_be_uint16_put(v,V) HB_STMT_START { v[0] = (V>>8); v[1] = (V); } HB_STMT_END 2897a52f281178867379adb6e6c6fb0022102f75d17Behdad Esfahbod#define hb_be_uint16_get(v) (uint16_t) ((v[0] << 8) + v[1]) 290153142dac8dd9abaf164bb88af07c600c17fc3a1Behdad Esfahbod#define hb_be_uint16_eq(a,b) (a[0] == b[0] && a[1] == b[1]) 2917a52f281178867379adb6e6c6fb0022102f75d17Behdad Esfahbod 292e032ed9f75d4a0f365649a25706871bbb5ae6651Behdad Esfahbod#define hb_be_uint32_put(v,V) HB_STMT_START { v[0] = (V>>24); v[1] = (V>>16); v[2] = (V>>8); v[3] = (V); } HB_STMT_END 2937a52f281178867379adb6e6c6fb0022102f75d17Behdad Esfahbod#define hb_be_uint32_get(v) (uint32_t) ((v[0] << 24) + (v[1] << 16) + (v[2] << 8) + v[3]) 294153142dac8dd9abaf164bb88af07c600c17fc3a1Behdad Esfahbod#define hb_be_uint32_eq(a,b) (a[0] == b[0] && a[1] == b[1] && a[2] == b[2] && a[3] == b[3]) 295f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod 296f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod 2974188096a7722f09ffa9319986c0286071da10a27Behdad Esfahbod/* ASCII tag/character handling */ 298db5227c40e5c35fe2ffb750f32b639cb44424a1dBehdad Esfahbod 299153142dac8dd9abaf164bb88af07c600c17fc3a1Behdad Esfahbodstatic inline unsigned char ISALPHA (unsigned char c) 300153142dac8dd9abaf164bb88af07c600c17fc3a1Behdad Esfahbod{ return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'); } 301153142dac8dd9abaf164bb88af07c600c17fc3a1Behdad Esfahbodstatic inline unsigned char ISALNUM (unsigned char c) 302153142dac8dd9abaf164bb88af07c600c17fc3a1Behdad Esfahbod{ return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'); } 303153142dac8dd9abaf164bb88af07c600c17fc3a1Behdad Esfahbodstatic inline unsigned char TOUPPER (unsigned char c) 304153142dac8dd9abaf164bb88af07c600c17fc3a1Behdad Esfahbod{ return (c >= 'a' && c <= 'z') ? c - 'a' + 'A' : c; } 305153142dac8dd9abaf164bb88af07c600c17fc3a1Behdad Esfahbodstatic inline unsigned char TOLOWER (unsigned char c) 306153142dac8dd9abaf164bb88af07c600c17fc3a1Behdad Esfahbod{ return (c >= 'A' && c <= 'Z') ? c - 'A' + 'a' : c; } 307db5227c40e5c35fe2ffb750f32b639cb44424a1dBehdad Esfahbod 3084188096a7722f09ffa9319986c0286071da10a27Behdad Esfahbod#define HB_TAG_CHAR4(s) (HB_TAG(((const char *) s)[0], \ 3094188096a7722f09ffa9319986c0286071da10a27Behdad Esfahbod ((const char *) s)[1], \ 3104188096a7722f09ffa9319986c0286071da10a27Behdad Esfahbod ((const char *) s)[2], \ 3114188096a7722f09ffa9319986c0286071da10a27Behdad Esfahbod ((const char *) s)[3])) 3124188096a7722f09ffa9319986c0286071da10a27Behdad Esfahbod 313db5227c40e5c35fe2ffb750f32b639cb44424a1dBehdad Esfahbod 314bc200457430c083914a64bf4b056153506749610Behdad Esfahbod/* Debug */ 315bc200457430c083914a64bf4b056153506749610Behdad Esfahbod 316bc200457430c083914a64bf4b056153506749610Behdad Esfahbod#ifndef HB_DEBUG 317bc200457430c083914a64bf4b056153506749610Behdad Esfahbod#define HB_DEBUG 0 318bc200457430c083914a64bf4b056153506749610Behdad Esfahbod#endif 319bc200457430c083914a64bf4b056153506749610Behdad Esfahbod 320fca368c4682624346a0aaee690e1ad6ed4c0b337Behdad Esfahbodstatic inline bool /* always returns TRUE */ 321bc200457430c083914a64bf4b056153506749610Behdad Esfahbod_hb_trace (const char *what, 322bc200457430c083914a64bf4b056153506749610Behdad Esfahbod const char *function, 323bc200457430c083914a64bf4b056153506749610Behdad Esfahbod const void *obj, 324bc200457430c083914a64bf4b056153506749610Behdad Esfahbod unsigned int depth, 325bc200457430c083914a64bf4b056153506749610Behdad Esfahbod unsigned int max_depth) 326bc200457430c083914a64bf4b056153506749610Behdad Esfahbod{ 32711e3ec444a85fc72541823c2e98cc92c4ceb19afBehdad Esfahbod (void) ((depth < max_depth) && fprintf (stderr, "%s(%p) %-*d-> %s\n", what, obj, depth, depth, function)); 328bc200457430c083914a64bf4b056153506749610Behdad Esfahbod return TRUE; 329bc200457430c083914a64bf4b056153506749610Behdad Esfahbod} 330bc200457430c083914a64bf4b056153506749610Behdad Esfahbod 331f60f2166c48d07f556ff83f04e95181946eb03dfBehdad Esfahbod 332acdba3f90b232fc12fcb200dca2584481b339118Behdad EsfahbodHB_END_DECLS 333acdba3f90b232fc12fcb200dca2584481b339118Behdad Esfahbod 334c57d454accff66e5f2c58006e8fb40bc020b6182Behdad Esfahbod#endif /* HB_PRIVATE_HH */ 335