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According to MSVC manual (*1), cl.exe can skip including a header file when that: - contains #pragma once, or - starts with #ifndef, or - starts with #if ! defined. GCC has a similar trick (*2), but it acts more stricter (e. g. there must be _no tokens_ outside of #ifndef...#endif). Sun C lacked #pragma once for a looong time. Oracle Developer Studio 12.5 finally implemented it, but we cannot assume such recent version. This changeset modifies header files so that each of them include strictly one #ifndef...#endif. I believe this is the most portable way to trigger compiler optimizations. [Bug #16770] *1: https://docs.microsoft.com/en-us/cpp/preprocessor/once *2: https://gcc.gnu.org/onlinedocs/cppinternals/Guard-Macros.html
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
#ifndef RUBY_ENCINDEX_H
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#define RUBY_ENCINDEX_H 1
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/**********************************************************************
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encindex.h -
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$Author$
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created at: Tue Sep 15 13:21:14 JST 2015
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Copyright (C) 2015 Yukihiro Matsumoto
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**********************************************************************/
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#include "ruby/encoding.h" /* rb_ascii8bit_encindex etc. */
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#if defined(__cplusplus)
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extern "C" {
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#if 0
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} /* satisfy cc-mode */
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#endif
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#endif
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enum ruby_preserved_encindex {
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RUBY_ENCINDEX_ASCII,
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RUBY_ENCINDEX_UTF_8,
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RUBY_ENCINDEX_US_ASCII,
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/* preserved indexes */
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RUBY_ENCINDEX_UTF_16BE,
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RUBY_ENCINDEX_UTF_16LE,
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RUBY_ENCINDEX_UTF_32BE,
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RUBY_ENCINDEX_UTF_32LE,
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RUBY_ENCINDEX_UTF_16,
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RUBY_ENCINDEX_UTF_32,
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RUBY_ENCINDEX_UTF8_MAC,
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/* for old options of regexp */
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RUBY_ENCINDEX_EUC_JP,
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RUBY_ENCINDEX_Windows_31J,
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RUBY_ENCINDEX_BUILTIN_MAX
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};
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#define ENCINDEX_ASCII RUBY_ENCINDEX_ASCII
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#define ENCINDEX_UTF_8 RUBY_ENCINDEX_UTF_8
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#define ENCINDEX_US_ASCII RUBY_ENCINDEX_US_ASCII
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#define ENCINDEX_UTF_16BE RUBY_ENCINDEX_UTF_16BE
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#define ENCINDEX_UTF_16LE RUBY_ENCINDEX_UTF_16LE
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#define ENCINDEX_UTF_32BE RUBY_ENCINDEX_UTF_32BE
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#define ENCINDEX_UTF_32LE RUBY_ENCINDEX_UTF_32LE
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#define ENCINDEX_UTF_16 RUBY_ENCINDEX_UTF_16
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#define ENCINDEX_UTF_32 RUBY_ENCINDEX_UTF_32
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#define ENCINDEX_UTF8_MAC RUBY_ENCINDEX_UTF8_MAC
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#define ENCINDEX_EUC_JP RUBY_ENCINDEX_EUC_JP
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#define ENCINDEX_Windows_31J RUBY_ENCINDEX_Windows_31J
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#define ENCINDEX_BUILTIN_MAX RUBY_ENCINDEX_BUILTIN_MAX
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#define rb_ascii8bit_encindex() RUBY_ENCINDEX_ASCII
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#define rb_utf8_encindex() RUBY_ENCINDEX_UTF_8
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#define rb_usascii_encindex() RUBY_ENCINDEX_US_ASCII
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int rb_enc_find_index2(const char *name, long len);
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#if defined(__cplusplus)
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#if 0
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{ /* satisfy cc-mode */
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#endif
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} /* extern "C" { */
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#endif
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#endif /* RUBY_ENCINDEX_H */
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