kc3-lang/harfbuzz/src/hb-unicode.h
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Hash : 378d279b
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Date : 2012-07-31T21:36:16
Implement Unicode compatibility decompositions Based on patch from Philip Withnall. https://bugs.freedesktop.org/show_bug.cgi?id=41095
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src/hb-unicode.h
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/* * Copyright © 2009 Red Hat, Inc. * Copyright © 2011 Codethink Limited * Copyright © 2011,2012 Google, Inc. * * This is part of HarfBuzz, a text shaping library. * * Permission is hereby granted, without written agreement and without * license or royalty fees, to use, copy, modify, and distribute this * software and its documentation for any purpose, provided that the * above copyright notice and the following two paragraphs appear in * all copies of this software. * * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH * DAMAGE. * * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. * * Red Hat Author(s): Behdad Esfahbod * Codethink Author(s): Ryan Lortie * Google Author(s): Behdad Esfahbod */ #ifndef HB_H_IN #error "Include <hb.h> instead." #endif #ifndef HB_UNICODE_H #define HB_UNICODE_H #include "hb-common.h" HB_BEGIN_DECLS /* * hb_unicode_funcs_t */ typedef struct hb_unicode_funcs_t hb_unicode_funcs_t; /* * just give me the best implementation you've got there. */ hb_unicode_funcs_t * hb_unicode_funcs_get_default (void); hb_unicode_funcs_t * hb_unicode_funcs_create (hb_unicode_funcs_t *parent); hb_unicode_funcs_t * hb_unicode_funcs_get_empty (void); hb_unicode_funcs_t * hb_unicode_funcs_reference (hb_unicode_funcs_t *ufuncs); void hb_unicode_funcs_destroy (hb_unicode_funcs_t *ufuncs); hb_bool_t hb_unicode_funcs_set_user_data (hb_unicode_funcs_t *ufuncs, hb_user_data_key_t *key, void * data, hb_destroy_func_t destroy, hb_bool_t replace); void * hb_unicode_funcs_get_user_data (hb_unicode_funcs_t *ufuncs, hb_user_data_key_t *key); void hb_unicode_funcs_make_immutable (hb_unicode_funcs_t *ufuncs); hb_bool_t hb_unicode_funcs_is_immutable (hb_unicode_funcs_t *ufuncs); hb_unicode_funcs_t * hb_unicode_funcs_get_parent (hb_unicode_funcs_t *ufuncs); /* * funcs */ /* typedefs */ typedef unsigned int (*hb_unicode_combining_class_func_t) (hb_unicode_funcs_t *ufuncs, hb_codepoint_t unicode, void *user_data); typedef unsigned int (*hb_unicode_eastasian_width_func_t) (hb_unicode_funcs_t *ufuncs, hb_codepoint_t unicode, void *user_data); typedef hb_unicode_general_category_t (*hb_unicode_general_category_func_t) (hb_unicode_funcs_t *ufuncs, hb_codepoint_t unicode, void *user_data); typedef hb_codepoint_t (*hb_unicode_mirroring_func_t) (hb_unicode_funcs_t *ufuncs, hb_codepoint_t unicode, void *user_data); typedef hb_script_t (*hb_unicode_script_func_t) (hb_unicode_funcs_t *ufuncs, hb_codepoint_t unicode, void *user_data); typedef hb_bool_t (*hb_unicode_compose_func_t) (hb_unicode_funcs_t *ufuncs, hb_codepoint_t a, hb_codepoint_t b, hb_codepoint_t *ab, void *user_data); typedef hb_bool_t (*hb_unicode_decompose_func_t) (hb_unicode_funcs_t *ufuncs, hb_codepoint_t ab, hb_codepoint_t *a, hb_codepoint_t *b, void *user_data); /** * hb_unicode_decompose_compatibility_func_t: * @ufuncs: Unicode function structure * @u: codepoint to decompose * @decomposed: address of codepoint array (of length %HB_UNICODE_MAX_DECOMPOSITION_LEN) to write decomposition into * @user_data: user data pointer as passed to hb_unicode_funcs_set_decompose_compatibility_func() * * Fully decompose @u to its Unicode compatibility decomposition. The codepoints of the decomposition will be written to @decomposed. * The complete length of the decomposition will be returned. * * If @u has no compatibility decomposition, zero should be returned. * * The Unicode standard guarantees that a buffer of length %HB_UNICODE_MAX_DECOMPOSITION_LEN codepoints will always be sufficient for any * compatibility decomposition plus an terminating value of 0. Consequently, @decompose must be allocated by the caller to be at least this length. Implementations * of this function type must ensure that they do not write past the provided array. * * Return value: number of codepoints in the full compatibility decomposition of @u, or 0 if no decomposition available. */ typedef unsigned int (*hb_unicode_decompose_compatibility_func_t) (hb_unicode_funcs_t *ufuncs, hb_codepoint_t u, hb_codepoint_t *decomposed, void *user_data); /* See Unicode 6.1 for details on the maximum decomposition length. */ #define HB_UNICODE_MAX_DECOMPOSITION_LEN (18+1) /* codepoints */ /* setters */ void hb_unicode_funcs_set_combining_class_func (hb_unicode_funcs_t *ufuncs, hb_unicode_combining_class_func_t combining_class_func, void *user_data, hb_destroy_func_t destroy); void hb_unicode_funcs_set_eastasian_width_func (hb_unicode_funcs_t *ufuncs, hb_unicode_eastasian_width_func_t eastasian_width_func, void *user_data, hb_destroy_func_t destroy); void hb_unicode_funcs_set_general_category_func (hb_unicode_funcs_t *ufuncs, hb_unicode_general_category_func_t general_category_func, void *user_data, hb_destroy_func_t destroy); void hb_unicode_funcs_set_mirroring_func (hb_unicode_funcs_t *ufuncs, hb_unicode_mirroring_func_t mirroring_func, void *user_data, hb_destroy_func_t destroy); void hb_unicode_funcs_set_script_func (hb_unicode_funcs_t *ufuncs, hb_unicode_script_func_t script_func, void *user_data, hb_destroy_func_t destroy); void hb_unicode_funcs_set_compose_func (hb_unicode_funcs_t *ufuncs, hb_unicode_compose_func_t compose_func, void *user_data, hb_destroy_func_t destroy); void hb_unicode_funcs_set_decompose_func (hb_unicode_funcs_t *ufuncs, hb_unicode_decompose_func_t decompose_func, void *user_data, hb_destroy_func_t destroy); void hb_unicode_funcs_set_decompose_compatibility_func (hb_unicode_funcs_t *ufuncs, hb_unicode_decompose_compatibility_func_t decompose_compatibility_func, void *user_data, hb_destroy_func_t destroy); /* accessors */ unsigned int hb_unicode_combining_class (hb_unicode_funcs_t *ufuncs, hb_codepoint_t unicode); unsigned int hb_unicode_eastasian_width (hb_unicode_funcs_t *ufuncs, hb_codepoint_t unicode); hb_unicode_general_category_t hb_unicode_general_category (hb_unicode_funcs_t *ufuncs, hb_codepoint_t unicode); hb_codepoint_t hb_unicode_mirroring (hb_unicode_funcs_t *ufuncs, hb_codepoint_t unicode); hb_script_t hb_unicode_script (hb_unicode_funcs_t *ufuncs, hb_codepoint_t unicode); hb_bool_t hb_unicode_compose (hb_unicode_funcs_t *ufuncs, hb_codepoint_t a, hb_codepoint_t b, hb_codepoint_t *ab); hb_bool_t hb_unicode_decompose (hb_unicode_funcs_t *ufuncs, hb_codepoint_t ab, hb_codepoint_t *a, hb_codepoint_t *b); unsigned int hb_unicode_decompose_compatibility (hb_unicode_funcs_t *ufuncs, hb_codepoint_t u, hb_codepoint_t *decomposed); HB_END_DECLS #endif /* HB_UNICODE_H */