| 1 | /* |
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| 2 | * Copyright © 2017 Google, Inc. |
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| 3 | * |
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| 4 | * This is part of HarfBuzz, a text shaping library. |
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| 5 | * |
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| 6 | * Permission is hereby granted, without written agreement and without |
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| 7 | * license or royalty fees, to use, copy, modify, and distribute this |
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| 8 | * software and its documentation for any purpose, provided that the |
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| 9 | * above copyright notice and the following two paragraphs appear in |
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| 10 | * all copies of this software. |
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| 11 | * |
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| 12 | * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
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| 13 | * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
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| 14 | * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
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| 15 | * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
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| 16 | * DAMAGE. |
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| 17 | * |
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| 18 | * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
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| 19 | * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
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| 20 | * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
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| 21 | * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
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| 22 | * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
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| 23 | * |
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| 24 | * Google Author(s): Behdad Esfahbod |
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| 25 | */ |
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| 26 | |
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| 27 | #ifndef HB_STRING_ARRAY_HH |
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| 28 | #if 0 /* Make checks happy. */ |
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| 29 | #define HB_STRING_ARRAY_HH |
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| 30 | #endif |
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| 31 | |
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| 32 | #include "hb-private.hh" |
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| 33 | |
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| 34 | /* Based on Bruno Haible's code in Appendix B of Ulrich Drepper's dsohowto.pdf: |
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| 35 | * https://software.intel.com/sites/default/files/m/a/1/e/dsohowto.pdf */ |
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| 36 | |
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| 37 | #define HB_STRING_ARRAY_TYPE_NAME HB_PASTE(HB_STRING_ARRAY_NAME, _msgstr_t) |
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| 38 | #define HB_STRING_ARRAY_POOL_NAME HB_PASTE(HB_STRING_ARRAY_NAME, _msgstr) |
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| 39 | #define HB_STRING_ARRAY_OFFS_NAME HB_PASTE(HB_STRING_ARRAY_NAME, _msgidx) |
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| 40 | |
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| 41 | static const union HB_STRING_ARRAY_TYPE_NAME { |
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| 42 | struct { |
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| 43 | /* I like to avoid storing the nul-termination byte since we don't need it, |
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| 44 | * but C++ does not allow that. |
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| 45 | * https://stackoverflow.com/questions/28433862/why-initializer-string-for-array-of-chars-is-too-long-compiles-fine-in-c-not |
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| 46 | */ |
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| 47 | #define _S(s) char HB_PASTE (str, __LINE__)[sizeof (s)]; |
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| 48 | #include HB_STRING_ARRAY_LIST |
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| 49 | #undef _S |
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| 50 | } st; |
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| 51 | char str[VAR]; |
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| 52 | } |
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| 53 | HB_STRING_ARRAY_POOL_NAME = |
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| 54 | { |
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| 55 | .st: { |
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| 56 | #define _S(s) s, |
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| 57 | #include HB_STRING_ARRAY_LIST |
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| 58 | #undef _S |
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| 59 | } |
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| 60 | }; |
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| 61 | static const unsigned int HB_STRING_ARRAY_OFFS_NAME[] = |
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| 62 | { |
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| 63 | #define _S(s) offsetof (union HB_STRING_ARRAY_TYPE_NAME, st.HB_PASTE(str, __LINE__)), |
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| 64 | #include HB_STRING_ARRAY_LIST |
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| 65 | #undef _S |
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| 66 | sizeof (HB_STRING_ARRAY_TYPE_NAME) |
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| 67 | }; |
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| 68 | |
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| 69 | static inline hb_string_t |
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| 70 | HB_STRING_ARRAY_NAME (unsigned int i) |
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| 71 | { |
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| 72 | assert (i < ARRAY_LENGTH (HB_STRING_ARRAY_OFFS_NAME) - 1); |
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| 73 | return hb_string_t (HB_STRING_ARRAY_POOL_NAME.str + HB_STRING_ARRAY_OFFS_NAME[i], |
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| 74 | HB_STRING_ARRAY_OFFS_NAME[i + 1] - HB_STRING_ARRAY_OFFS_NAME[i] - 1); |
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| 75 | } |
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| 76 | |
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| 77 | #undef HB_STRING_ARRAY_TYPE_NAME |
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| 78 | #undef HB_STRING_ARRAY_POOL_NAME |
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| 79 | #undef HB_STRING_ARRAY_OFFS_NAME |
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| 80 | |
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| 81 | #endif /* HB_STRING_ARRAY_HH */ |
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| 82 | |
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