maint/gnulib/lib/unilbrk/lbrktables.h

/* */
This source file includes following definitions.
unilbrkprop_lookup
   1 /* Line breaking auxiliary tables.
   2    Copyright (C) 2001-2003, 2006-2021 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2001.
   4 
   5    This file is free software.
   6    It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
   7    You can redistribute it and/or modify it under either
   8      - the terms of the GNU Lesser General Public License as published
   9        by the Free Software Foundation; either version 3, or (at your
  10        option) any later version, or
  11      - the terms of the GNU General Public License as published by the
  12        Free Software Foundation; either version 2, or (at your option)
  13        any later version, or
  14      - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
  15 
  16    This file is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19    Lesser General Public License and the GNU General Public License
  20    for more details.
  21 
  22    You should have received a copy of the GNU Lesser General Public
  23    License and of the GNU General Public License along with this
  24    program.  If not, see <https://www.gnu.org/licenses/>.  */
  25 
  26 #include "unitypes.h"
  27 
  28 /* Line breaking classification.  */
  29 
  30 enum
  31 {
  32   /* Values >= 30 are resolved at run time. */
  33   LBP_BK = 30, /* mandatory break */
  34 /*LBP_CR,         carriage return - not used here because it's a DOSism */
  35 /*LBP_LF,         line feed - not used here because it's a DOSism */
  36   LBP_CM = 31, /* attached characters and combining marks */
  37 /*LBP_NL,         next line - not used here because it's equivalent to LBP_BK */
  38 /*LBP_SG,         surrogates - not used here because they are not characters */
  39   LBP_WJ =  0, /* word joiner */
  40   LBP_ZW = 32, /* zero width space */
  41   LBP_GL =  1, /* non-breaking (glue) */
  42   LBP_SP = 33, /* space */
  43   LBP_B2 =  2, /* break opportunity before and after */
  44   LBP_BA =  3, /* break opportunity after */
  45   LBP_BB =  4, /* break opportunity before */
  46   LBP_HY =  5, /* hyphen */
  47   LBP_CB = 34, /* contingent break opportunity */
  48   LBP_CL =  6, /* closing punctuation */
  49   LBP_CP =  7, /* closing parenthesis */
  50   LBP_EX =  8, /* exclamation/interrogation */
  51   LBP_IN =  9, /* inseparable */
  52   LBP_NS = 10, /* non starter */
  53   LBP_OP = 11, /* opening punctuation */
  54   LBP_QU = 12, /* ambiguous quotation */
  55   LBP_IS = 13, /* infix separator (numeric) */
  56   LBP_NU = 14, /* numeric */
  57   LBP_PO = 15, /* postfix (numeric) */
  58   LBP_PR = 16, /* prefix (numeric) */
  59   LBP_SY = 17, /* symbols allowing breaks */
  60   LBP_AI = 35, /* ambiguous (alphabetic or ideograph) */
  61   LBP_AL = 18, /* ordinary alphabetic and symbol characters */
  62 /*LBP_CJ,         conditional Japanese starters, resolved to NS */
  63   LBP_H2 = 19, /* Hangul LV syllable */
  64   LBP_H3 = 20, /* Hangul LVT syllable */
  65   LBP_HL = 25, /* Hebrew letter */
  66   LBP_ID = 21, /* ideographic */
  67   LBP_JL = 22, /* Hangul L Jamo */
  68   LBP_JV = 23, /* Hangul V Jamo */
  69   LBP_JT = 24, /* Hangul T Jamo */
  70   LBP_RI = 26, /* regional indicator */
  71   LBP_SA = 36, /* complex context (South East Asian) */
  72   LBP_ZWJ = 27, /* zero width joiner */
  73   LBP_EB = 28, /* emoji base */
  74   LBP_EM = 29, /* emoji modifier */
  75   LBP_XX = 37  /* unknown */
  76 };
  77 
  78 #include "lbrkprop1.h"
  79 
  80 static inline unsigned char
  81 unilbrkprop_lookup (ucs4_t uc)
     /*  */
  82 {
  83   unsigned int index1 = uc >> lbrkprop_header_0;
  84   if (index1 < lbrkprop_header_1)
  85     {
  86       int lookup1 = unilbrkprop.level1[index1];
  87       if (lookup1 >= 0)
  88         {
  89           unsigned int index2 = (uc >> lbrkprop_header_2) & lbrkprop_header_3;
  90           int lookup2 = unilbrkprop.level2[lookup1 + index2];
  91           if (lookup2 >= 0)
  92             {
  93               unsigned int index3 = uc & lbrkprop_header_4;
  94               return unilbrkprop.level3[lookup2 + index3];
  95             }
  96         }
  97     }
  98   return LBP_XX;
  99 }
 100 
 101 /* Table indexed by two line breaking classifications.  */
 102 #define D 1  /* direct break opportunity, empty in table 7.3 of UTR #14 */
 103 #define I 2  /* indirect break opportunity, '%' in table 7.3 of UTR #14 */
 104 #define P 3  /* prohibited break,           '^' in table 7.3 of UTR #14 */
 105 
 106 extern const unsigned char unilbrk_table[30][30];
 107 
 108 /* We don't support line breaking of complex-context dependent characters
 109    (Thai, Lao, Myanmar, Khmer) yet, because it requires dictionary lookup. */
/* */
root/maint/gnulib/lib/unilbrk/lbrktables.h

INCLUDED FROM

DEFINITIONS
