src/hb-common.h

   1 /*
   2  * Copyright © 2007,2008,2009  Red Hat, Inc.
   3  * Copyright © 2011,2012  Google, Inc.
   4  *
   5  *  This is part of HarfBuzz, a text shaping library.
   6  *
   7  * Permission is hereby granted, without written agreement and without
   8  * license or royalty fees, to use, copy, modify, and distribute this
   9  * software and its documentation for any purpose, provided that the
  10  * above copyright notice and the following two paragraphs appear in
  11  * all copies of this software.
  12  *
  13  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
  14  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
  15  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
  16  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
  17  * DAMAGE.
  18  *
  19  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
  20  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  21  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
  22  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
  23  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
  24  *
  25  * Red Hat Author(s): Behdad Esfahbod
  26  * Google Author(s): Behdad Esfahbod
  27  */
  28
  29 #ifndef HB_H_IN
  30 #error "Include <hb.h> instead."
  31 #endif
  32
  33 #ifndef HB_COMMON_H
  34 #define HB_COMMON_H
  35
  36 #ifndef HB_BEGIN_DECLS
  37 # ifdef __cplusplus
  38 #  define HB_BEGIN_DECLS        extern "C" {
  39 #  define HB_END_DECLS          }
  40 # else /* !__cplusplus */
  41 #  define HB_BEGIN_DECLS
  42 #  define HB_END_DECLS
  43 # endif /* !__cplusplus */
  44 #endif
  45
  46 #if !defined (HB_DONT_DEFINE_STDINT)
  47
  48 #if defined (_SVR4) || defined (SVR4) || defined (__OpenBSD__) || \
  49     defined (_sgi) || defined (__sun) || defined (sun) || \
  50     defined (__digital__) || defined (__HP_cc)
  51 #  include <inttypes.h>
  52 #elif defined (_AIX)
  53 #  include <sys/inttypes.h>
  54 /* VS 2010 (_MSC_VER 1600) has stdint.h */
  55 #elif defined (_MSC_VER) && _MSC_VER < 1600
  56 typedef __int8 int8_t;
  57 typedef unsigned __int8 uint8_t;
  58 typedef __int16 int16_t;
  59 typedef unsigned __int16 uint16_t;
  60 typedef __int32 int32_t;
  61 typedef unsigned __int32 uint32_t;
  62 typedef __int64 int64_t;
  63 typedef unsigned __int64 uint64_t;
  64 #else
  65 #  include <stdint.h>
  66 #endif
  67
  68 #endif
  69
  70 HB_BEGIN_DECLS
  71
  72
  73 typedef int hb_bool_t;
  74
  75 typedef uint32_t hb_codepoint_t;
  76 typedef int32_t hb_position_t;
  77 typedef uint32_t hb_mask_t;
  78
  79 typedef union _hb_var_int_t {
  80   uint32_t u32;
  81   int32_t i32;
  82   uint16_t u16[2];
  83   int16_t i16[2];
  84   uint8_t u8[4];
  85   int8_t i8[4];
  86 } hb_var_int_t;
  87
  88
  89 /* hb_tag_t */
  90
  91 typedef uint32_t hb_tag_t;
  92
  93 #define HB_TAG(a,b,c,d) ((hb_tag_t)((((uint8_t)(a))<<24)|(((uint8_t)(b))<<16)|(((uint8_t)(c))<<8)|((uint8_t)(d))))
  94 #define HB_UNTAG(tag)   ((uint8_t)((tag)>>24)), ((uint8_t)((tag)>>16)), ((uint8_t)((tag)>>8)), ((uint8_t)(tag))
  95
  96 #define HB_TAG_NONE HB_TAG(0,0,0,0)
  97
  98 /* len=-1 means str is NUL-terminated */
  99 hb_tag_t
 100 hb_tag_from_string (const char *str, int len);
 101
 102
 103 /* hb_direction_t */
 104
 105 typedef enum {
 106   HB_DIRECTION_INVALID = 0,
 107   HB_DIRECTION_LTR = 4,
 108   HB_DIRECTION_RTL,
 109   HB_DIRECTION_TTB,
 110   HB_DIRECTION_BTT
 111 } hb_direction_t;
 112
 113 /* len=-1 means str is NUL-terminated */
 114 hb_direction_t
 115 hb_direction_from_string (const char *str, int len);
 116
 117 const char *
 118 hb_direction_to_string (hb_direction_t direction);
 119
 120 #define HB_DIRECTION_IS_HORIZONTAL(dir) ((((unsigned int) (dir)) & ~1U) == 4)
 121 #define HB_DIRECTION_IS_VERTICAL(dir)   ((((unsigned int) (dir)) & ~1U) == 6)
 122 #define HB_DIRECTION_IS_FORWARD(dir)    ((((unsigned int) (dir)) & ~2U) == 4)
 123 #define HB_DIRECTION_IS_BACKWARD(dir)   ((((unsigned int) (dir)) & ~2U) == 5)
 124 #define HB_DIRECTION_IS_VALID(dir)      ((((unsigned int) (dir)) & ~3U) == 4)
 125 #define HB_DIRECTION_REVERSE(dir)       ((hb_direction_t) (((unsigned int) (dir)) ^ 1)) /* Direction must be valid */
 126
 127
 128 /* hb_language_t */
 129
 130 typedef struct hb_language_impl_t *hb_language_t;
 131
 132 /* len=-1 means str is NUL-terminated */
 133 hb_language_t
 134 hb_language_from_string (const char *str, int len);
 135
 136 const char *
 137 hb_language_to_string (hb_language_t language);
 138
 139 #define HB_LANGUAGE_INVALID ((hb_language_t) NULL)
 140
 141 hb_language_t
 142 hb_language_get_default (void);
 143
 144
 145 /* hb_script_t */
 146
 147 /* http://unicode.org/iso15924/ */
 148 /* http://goo.gl/x9ilM */
 149 /* Unicode Character Database property: Script (sc) */
 150 typedef enum
 151 {
 152   /* Unicode-1.1 additions */
 153   HB_SCRIPT_COMMON                      = HB_TAG ('Z','y','y','y'),
 154   HB_SCRIPT_ARABIC                      = HB_TAG ('A','r','a','b'),
 155   HB_SCRIPT_ARMENIAN                    = HB_TAG ('A','r','m','n'),
 156   HB_SCRIPT_BENGALI                     = HB_TAG ('B','e','n','g'),
 157   HB_SCRIPT_BOPOMOFO                    = HB_TAG ('B','o','p','o'),
 158   HB_SCRIPT_CANADIAN_ABORIGINAL         = HB_TAG ('C','a','n','s'),
 159   HB_SCRIPT_CHEROKEE                    = HB_TAG ('C','h','e','r'),
 160   HB_SCRIPT_COPTIC                      = HB_TAG ('C','o','p','t'),
 161   HB_SCRIPT_CYRILLIC                    = HB_TAG ('C','y','r','l'),
 162   HB_SCRIPT_DEVANAGARI                  = HB_TAG ('D','e','v','a'),
 163   HB_SCRIPT_GEORGIAN                    = HB_TAG ('G','e','o','r'),
 164   HB_SCRIPT_GREEK                       = HB_TAG ('G','r','e','k'),
 165   HB_SCRIPT_GUJARATI                    = HB_TAG ('G','u','j','r'),
 166   HB_SCRIPT_GURMUKHI                    = HB_TAG ('G','u','r','u'),
 167   HB_SCRIPT_HANGUL                      = HB_TAG ('H','a','n','g'),
 168   HB_SCRIPT_HAN                         = HB_TAG ('H','a','n','i'),
 169   HB_SCRIPT_HEBREW                      = HB_TAG ('H','e','b','r'),
 170   HB_SCRIPT_HIRAGANA                    = HB_TAG ('H','i','r','a'),
 171   HB_SCRIPT_INHERITED                   = HB_TAG ('Z','i','n','h'),
 172   HB_SCRIPT_KANNADA                     = HB_TAG ('K','n','d','a'),
 173   HB_SCRIPT_KATAKANA                    = HB_TAG ('K','a','n','a'),
 174   HB_SCRIPT_LAO                         = HB_TAG ('L','a','o','o'),
 175   HB_SCRIPT_LATIN                       = HB_TAG ('L','a','t','n'),
 176   HB_SCRIPT_MALAYALAM                   = HB_TAG ('M','l','y','m'),
 177   HB_SCRIPT_MONGOLIAN                   = HB_TAG ('M','o','n','g'),
 178   HB_SCRIPT_OGHAM                       = HB_TAG ('O','g','a','m'),
 179   HB_SCRIPT_ORIYA                       = HB_TAG ('O','r','y','a'),
 180   HB_SCRIPT_RUNIC                       = HB_TAG ('R','u','n','r'),
 181   HB_SCRIPT_SYRIAC                      = HB_TAG ('S','y','r','c'),
 182   HB_SCRIPT_TAMIL                       = HB_TAG ('T','a','m','l'),
 183   HB_SCRIPT_TELUGU                      = HB_TAG ('T','e','l','u'),
 184   HB_SCRIPT_THAI                        = HB_TAG ('T','h','a','i'),
 185   HB_SCRIPT_YI                          = HB_TAG ('Y','i','i','i'),
 186
 187   /* Unicode-2.0 additions */
 188   HB_SCRIPT_TIBETAN                     = HB_TAG ('T','i','b','t'),
 189
 190   /* Unicode-3.0 additions */
 191   HB_SCRIPT_ETHIOPIC                    = HB_TAG ('E','t','h','i'),
 192   HB_SCRIPT_KHMER                       = HB_TAG ('K','h','m','r'),
 193   HB_SCRIPT_MYANMAR                     = HB_TAG ('M','y','m','r'),
 194   HB_SCRIPT_SINHALA                     = HB_TAG ('S','i','n','h'),
 195   HB_SCRIPT_THAANA                      = HB_TAG ('T','h','a','a'),
 196
 197   /* Unicode-3.1 additions */
 198   HB_SCRIPT_DESERET                     = HB_TAG ('D','s','r','t'),
 199   HB_SCRIPT_GOTHIC                      = HB_TAG ('G','o','t','h'),
 200   HB_SCRIPT_OLD_ITALIC                  = HB_TAG ('I','t','a','l'),
 201
 202   /* Unicode-3.2 additions */
 203   HB_SCRIPT_BUHID                       = HB_TAG ('B','u','h','d'),
 204   HB_SCRIPT_HANUNOO                     = HB_TAG ('H','a','n','o'),
 205   HB_SCRIPT_TAGALOG                     = HB_TAG ('T','g','l','g'),
 206   HB_SCRIPT_TAGBANWA                    = HB_TAG ('T','a','g','b'),
 207
 208   /* Unicode-4.0 additions */
 209   HB_SCRIPT_BRAILLE                     = HB_TAG ('B','r','a','i'),
 210   HB_SCRIPT_CYPRIOT                     = HB_TAG ('C','p','r','t'),
 211   HB_SCRIPT_LIMBU                       = HB_TAG ('L','i','m','b'),
 212   HB_SCRIPT_LINEAR_B                    = HB_TAG ('L','i','n','b'),
 213   HB_SCRIPT_OSMANYA                     = HB_TAG ('O','s','m','a'),
 214   HB_SCRIPT_SHAVIAN                     = HB_TAG ('S','h','a','w'),
 215   HB_SCRIPT_TAI_LE                      = HB_TAG ('T','a','l','e'),
 216   HB_SCRIPT_UGARITIC                    = HB_TAG ('U','g','a','r'),
 217
 218   /* Unicode-4.1 additions */
 219   HB_SCRIPT_BUGINESE                    = HB_TAG ('B','u','g','i'),
 220   HB_SCRIPT_GLAGOLITIC                  = HB_TAG ('G','l','a','g'),
 221   HB_SCRIPT_KHAROSHTHI                  = HB_TAG ('K','h','a','r'),
 222   HB_SCRIPT_NEW_TAI_LUE                 = HB_TAG ('T','a','l','u'),
 223   HB_SCRIPT_OLD_PERSIAN                 = HB_TAG ('X','p','e','o'),
 224   HB_SCRIPT_SYLOTI_NAGRI                = HB_TAG ('S','y','l','o'),
 225   HB_SCRIPT_TIFINAGH                    = HB_TAG ('T','f','n','g'),
 226
 227   /* Unicode-5.0 additions */
 228   HB_SCRIPT_BALINESE                    = HB_TAG ('B','a','l','i'),
 229   HB_SCRIPT_CUNEIFORM                   = HB_TAG ('X','s','u','x'),
 230   HB_SCRIPT_NKO                         = HB_TAG ('N','k','o','o'),
 231   HB_SCRIPT_PHAGS_PA                    = HB_TAG ('P','h','a','g'),
 232   HB_SCRIPT_PHOENICIAN                  = HB_TAG ('P','h','n','x'),
 233   HB_SCRIPT_UNKNOWN                     = HB_TAG ('Z','z','z','z'),
 234
 235   /* Unicode-5.1 additions */
 236   HB_SCRIPT_CARIAN                      = HB_TAG ('C','a','r','i'),
 237   HB_SCRIPT_CHAM                        = HB_TAG ('C','h','a','m'),
 238   HB_SCRIPT_KAYAH_LI                    = HB_TAG ('K','a','l','i'),
 239   HB_SCRIPT_LEPCHA                      = HB_TAG ('L','e','p','c'),
 240   HB_SCRIPT_LYCIAN                      = HB_TAG ('L','y','c','i'),
 241   HB_SCRIPT_LYDIAN                      = HB_TAG ('L','y','d','i'),
 242   HB_SCRIPT_OL_CHIKI                    = HB_TAG ('O','l','c','k'),
 243   HB_SCRIPT_REJANG                      = HB_TAG ('R','j','n','g'),
 244   HB_SCRIPT_SAURASHTRA                  = HB_TAG ('S','a','u','r'),
 245   HB_SCRIPT_SUNDANESE                   = HB_TAG ('S','u','n','d'),
 246   HB_SCRIPT_VAI                         = HB_TAG ('V','a','i','i'),
 247
 248   /* Unicode-5.2 additions */
 249   HB_SCRIPT_AVESTAN                     = HB_TAG ('A','v','s','t'),
 250   HB_SCRIPT_BAMUM                       = HB_TAG ('B','a','m','u'),
 251   HB_SCRIPT_EGYPTIAN_HIEROGLYPHS        = HB_TAG ('E','g','y','p'),
 252   HB_SCRIPT_IMPERIAL_ARAMAIC            = HB_TAG ('A','r','m','i'),
 253   HB_SCRIPT_INSCRIPTIONAL_PAHLAVI       = HB_TAG ('P','h','l','i'),
 254   HB_SCRIPT_INSCRIPTIONAL_PARTHIAN      = HB_TAG ('P','r','t','i'),
 255   HB_SCRIPT_JAVANESE                    = HB_TAG ('J','a','v','a'),
 256   HB_SCRIPT_KAITHI                      = HB_TAG ('K','t','h','i'),
 257   HB_SCRIPT_LISU                        = HB_TAG ('L','i','s','u'),
 258   HB_SCRIPT_MEETEI_MAYEK                = HB_TAG ('M','t','e','i'),
 259   HB_SCRIPT_OLD_SOUTH_ARABIAN           = HB_TAG ('S','a','r','b'),
 260   HB_SCRIPT_OLD_TURKIC                  = HB_TAG ('O','r','k','h'),
 261   HB_SCRIPT_SAMARITAN                   = HB_TAG ('S','a','m','r'),
 262   HB_SCRIPT_TAI_THAM                    = HB_TAG ('L','a','n','a'),
 263   HB_SCRIPT_TAI_VIET                    = HB_TAG ('T','a','v','t'),
 264
 265   /* Unicode-6.0 additions */
 266   HB_SCRIPT_BATAK                       = HB_TAG ('B','a','t','k'),
 267   HB_SCRIPT_BRAHMI                      = HB_TAG ('B','r','a','h'),
 268   HB_SCRIPT_MANDAIC                     = HB_TAG ('M','a','n','d'),
 269
 270   /* Unicode-6.1 additions */
 271   HB_SCRIPT_CHAKMA                      = HB_TAG ('C','a','k','m'),
 272   HB_SCRIPT_MEROITIC_CURSIVE            = HB_TAG ('M','e','r','c'),
 273   HB_SCRIPT_MEROITIC_HIEROGLYPHS        = HB_TAG ('M','e','r','o'),
 274   HB_SCRIPT_MIAO                        = HB_TAG ('P','l','r','d'),
 275   HB_SCRIPT_SHARADA                     = HB_TAG ('S','h','r','d'),
 276   HB_SCRIPT_SORA_SOMPENG                = HB_TAG ('S','o','r','a'),
 277   HB_SCRIPT_TAKRI                       = HB_TAG ('T','a','k','r'),
 278
 279   /* No script set */
 280   HB_SCRIPT_INVALID                     = HB_TAG_NONE
 281 } hb_script_t;
 282
 283
 284 /* Script functions */
 285
 286 hb_script_t
 287 hb_script_from_iso15924_tag (hb_tag_t tag);
 288
 289 /* suger for tag_from_string() then script_from_iso15924_tag */
 290 /* len=-1 means s is NUL-terminated */
 291 hb_script_t
 292 hb_script_from_string (const char *s, int len);
 293
 294 hb_tag_t
 295 hb_script_to_iso15924_tag (hb_script_t script);
 296
 297 hb_direction_t
 298 hb_script_get_horizontal_direction (hb_script_t script);
 299
 300
 301 /* User data */
 302
 303 typedef struct hb_user_data_key_t {
 304   /*< private >*/
 305   char unused;
 306 } hb_user_data_key_t;
 307
 308 typedef void (*hb_destroy_func_t) (void *user_data);
 309
 310
 311 HB_END_DECLS
 312
 313 #endif /* HB_COMMON_H */