qfribidi.h

/*
 * FriBidi - Library of BiDi algorithm
 * 
 * Copyright (C) 1999 Dov Grobgeld
 *
 * The optimizations to reduce the code size from 13 KB to 3 KB and
 * the embed/override hack handling are
 * Copyright (C) 2000 Fabrice Bellard.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

typedef int FriBidiChar;

typedef enum {
    /* do not change the order of these constants since 'property_val'
       depends on them */
    FRIBIDI_TYPE_LTR,           /* Strong left to right */
    FRIBIDI_TYPE_RTL,           /* Right to left characters */
    FRIBIDI_TYPE_WL,            /* Weak left to right */
    FRIBIDI_TYPE_WR,            /* Weak right to left */
    FRIBIDI_TYPE_EN,            /* European digit */
    FRIBIDI_TYPE_ES,            /* European number separator */
    FRIBIDI_TYPE_ET,            /* European number terminator */
    FRIBIDI_TYPE_AN,            /* Arabic digit */
    FRIBIDI_TYPE_CS,            /* Common Separator */
    FRIBIDI_TYPE_BS,            /* Block separator */
    FRIBIDI_TYPE_SS,            /* Segment separator */
    FRIBIDI_TYPE_WS,            /* Whitespace */
    FRIBIDI_TYPE_AL,            /* Arabic characters */
    FRIBIDI_TYPE_NSM,           /* Non spacing mark */
    FRIBIDI_TYPE_BN,
    FRIBIDI_TYPE_ON,            /* Other Neutral */
    FRIBIDI_TYPE_LRE,           /* Left-To-Right embedding */
    FRIBIDI_TYPE_RLE,           /* Right-To-Left embedding */
    FRIBIDI_TYPE_PDF,           /* Pop directional override */
    FRIBIDI_TYPE_LRO,           /* Left-To-Right override */
    FRIBIDI_TYPE_RLO,           /* Right-To-Left override */

    /* The following are only used internally */
    FRIBIDI_TYPE_SOT,
    FRIBIDI_TYPE_EOT,
    FRIBIDI_TYPE_N,
    FRIBIDI_TYPE_E,
    FRIBIDI_TYPE_CTL,           /* Control units */
    FRIBIDI_TYPE_EO,            /* Control units */
    FRIBIDI_TYPE_NULL,          /* type record is to be deleted */
    FRIBIDI_TYPE_L = FRIBIDI_TYPE_LTR,
    FRIBIDI_TYPE_R = FRIBIDI_TYPE_RTL,
    FRIBIDI_TYPE_CM = FRIBIDI_TYPE_ON + 2,
} FriBidiCharType;

/*======================================================================
// Typedef for the run-length list.
//----------------------------------------------------------------------*/
typedef struct _TypeLink {
    FriBidiCharType type;
    int pos;
    int len;
    int level;
} TypeLink;

FriBidiCharType fribidi_get_type(FriBidiChar ch);
FriBidiCharType fribidi_get_type_test(FriBidiChar ch);
FriBidiChar fribidi_get_mirror_char(FriBidiChar ch);

void fribidi_analyse_string(TypeLink *type_rl_list,
                            FriBidiCharType *pbase_dir,
                            int *pmax_level);