86 lines
2.8 KiB
C++
86 lines
2.8 KiB
C++
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/*
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* Copyright © 2017 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Google Author(s): Behdad Esfahbod
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*/
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#ifndef HB_STRING_ARRAY_HH
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#if 0 /* Make checks happy. */
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#define HB_STRING_ARRAY_HH
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#endif
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#include "hb.hh"
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/* Based on Bruno Haible's code in Appendix B of Ulrich Drepper's dsohowto.pdf:
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* https://software.intel.com/sites/default/files/m/a/1/e/dsohowto.pdf */
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#define HB_STRING_ARRAY_TYPE_NAME HB_PASTE(HB_STRING_ARRAY_NAME, _msgstr_t)
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#define HB_STRING_ARRAY_POOL_NAME HB_PASTE(HB_STRING_ARRAY_NAME, _msgstr)
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#define HB_STRING_ARRAY_OFFS_NAME HB_PASTE(HB_STRING_ARRAY_NAME, _msgidx)
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#define HB_STRING_ARRAY_LENG_NAME HB_PASTE(HB_STRING_ARRAY_NAME, _length)
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static const union HB_STRING_ARRAY_TYPE_NAME {
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struct {
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/* I like to avoid storing the nul-termination byte since we don't need it,
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* but C++ does not allow that.
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* https://stackoverflow.com/q/28433862
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*/
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#define _S(s) char HB_PASTE (str, __LINE__)[sizeof (s)];
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#include HB_STRING_ARRAY_LIST
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#undef _S
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} st;
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char str[HB_VAR_ARRAY];
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}
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HB_STRING_ARRAY_POOL_NAME =
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{
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{
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#define _S(s) s,
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#include HB_STRING_ARRAY_LIST
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#undef _S
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}
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};
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static const unsigned int HB_STRING_ARRAY_OFFS_NAME[] =
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{
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#define _S(s) offsetof (union HB_STRING_ARRAY_TYPE_NAME, st.HB_PASTE(str, __LINE__)),
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#include HB_STRING_ARRAY_LIST
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#undef _S
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sizeof (HB_STRING_ARRAY_TYPE_NAME)
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};
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static const unsigned int HB_STRING_ARRAY_LENG_NAME = ARRAY_LENGTH_CONST (HB_STRING_ARRAY_OFFS_NAME) - 1;
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static inline hb_bytes_t
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HB_STRING_ARRAY_NAME (unsigned int i)
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{
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assert (i < ARRAY_LENGTH (HB_STRING_ARRAY_OFFS_NAME) - 1);
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return hb_bytes_t (HB_STRING_ARRAY_POOL_NAME.str + HB_STRING_ARRAY_OFFS_NAME[i],
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HB_STRING_ARRAY_OFFS_NAME[i + 1] - HB_STRING_ARRAY_OFFS_NAME[i] - 1);
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}
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#undef HB_STRING_ARRAY_TYPE_NAME
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#undef HB_STRING_ARRAY_POOL_NAME
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#undef HB_STRING_ARRAY_OFFS_NAME
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#undef HB_STRING_ARRAY_LENG_NAME
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#endif /* HB_STRING_ARRAY_HH */
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