79 lines
3.1 KiB
C
79 lines
3.1 KiB
C
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/* For use with Bidi Reference Implementation
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For more information see the associated file bidi-std.c
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Credits:
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-------
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Written by: Asmus Freytag
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Command line interface by: Rick McGowan
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Verification (v24): Doug Felt
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Disclaimer and legal rights:
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---------------------------
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Copyright (C) 1999-2009, ASMUS, Inc. All Rights Reserved.
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Distributed under the Terms of Use in http://www.unicode.org/copyright.html.
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THIS SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN THIS NOTICE
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BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES,
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OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THE SOFTWARE.
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*/
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/* Bidirectional Character Types
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* as defined by the Unicode Bidirectional Algorithm Table 3-7.
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* The list of bidirectional character types here is not grouped the
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* same way as the table 3-7, since the numeric values for the types
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* are chosen to keep the state and action tables compact.
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*/
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enum
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{
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/* input types */
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/* ON MUST be zero, code relies on ON = N = 0 */
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BDI_ON = 0, /* Other Neutral */
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BDI_L, /* Left-to-right Letter */
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BDI_R, /* Right-to-left Letter */
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BDI_AN, /* Arabic Number */
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BDI_EN, /* European Number */
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BDI_AL, /* Arabic Letter (Right-to-left) */
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BDI_NSM, /* Non-spacing Mark */
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BDI_CS, /* Common Separator */
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BDI_ES, /* European Separator */
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BDI_ET, /* European Terminator (post/prefix e.g. $ and %) */
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/* resolved types */
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BDI_BN, /* Boundary neutral (type of RLE etc after explicit levels)*/
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/* input types, */
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BDI_S, /* Segment Separator (TAB) used only in L1 */
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BDI_WS, /* White space used only in L1 */
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BDI_B, /* Paragraph Separator (aka as PS) */
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/* types for explicit controls */
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BDI_RLO, /* these are used only in X1-X9 */
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BDI_RLE,
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BDI_LRO,
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BDI_LRE,
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BDI_PDF,
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/* resolved types, also resolved directions */
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BDI_N = BDI_ON /* alias, where ON, WS and S are treated the same */
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};
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typedef int fz_bidi_level; /* Note: Max level is 125 */
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typedef uint8_t fz_bidi_chartype;
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enum
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{
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BIDI_LEVEL_MAX = 125 /* Updated for 6.3.0 */
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};
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void fz_bidi_resolve_neutrals(fz_bidi_level baselevel, fz_bidi_chartype *pcls, const fz_bidi_level *plevel, size_t cch);
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void fz_bidi_resolve_implicit(const fz_bidi_chartype *pcls, fz_bidi_level *plevel, size_t cch);
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void fz_bidi_resolve_weak(fz_context *ctx, fz_bidi_level baselevel, fz_bidi_chartype *pcls, fz_bidi_level *plevel, size_t cch);
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void fz_bidi_resolve_whitespace(fz_bidi_level baselevel, const fz_bidi_chartype *pcls, fz_bidi_level *plevel, size_t cch);
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size_t fz_bidi_resolve_explicit(fz_bidi_level level, fz_bidi_chartype dir, fz_bidi_chartype *pcls, fz_bidi_level *plevel, size_t cch, fz_bidi_level nNest);
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int fz_bidi_resolve_paragraphs(fz_bidi_chartype *types, int cch);
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