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author | Steven R. Loomis <srloomis@us.ibm.com> | 2016-04-08 19:03:16 -0700 |
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committer | Steven R. Loomis <srloomis@us.ibm.com> | 2016-05-04 16:02:45 -0700 |
commit | 2bbd1cd6004b3e1467e30d860385a85dad01fe24 (patch) | |
tree | b812046e89e46e0de09bc858e0b128787cbc0632 /deps/icu-small/source/common/unistrappender.h | |
parent | cd752e8463fad7c4805951d9ba47cd2f39691f2d (diff) | |
download | android-node-v8-2bbd1cd6004b3e1467e30d860385a85dad01fe24.tar.gz android-node-v8-2bbd1cd6004b3e1467e30d860385a85dad01fe24.tar.bz2 android-node-v8-2bbd1cd6004b3e1467e30d860385a85dad01fe24.zip |
deps: Intl: Check in "small-icu" 57.1
* this commit has "small" ICU 57.1.
See other related commit for tools to generate this commit.
Fixes: https://github.com/nodejs/node/issues/3476
PR-URL: https://github.com/nodejs/node/pull/6088
Reviewed-By: James M Snell <jasnell@gmail.com>
Diffstat (limited to 'deps/icu-small/source/common/unistrappender.h')
-rw-r--r-- | deps/icu-small/source/common/unistrappender.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/deps/icu-small/source/common/unistrappender.h b/deps/icu-small/source/common/unistrappender.h new file mode 100644 index 0000000000..a6f7c2efc4 --- /dev/null +++ b/deps/icu-small/source/common/unistrappender.h @@ -0,0 +1,88 @@ +/* +****************************************************************************** +* Copyright (C) 2015, International Business Machines Corporation and +* others. All Rights Reserved. +****************************************************************************** +* +* File unistrappender.h +****************************************************************************** +*/ + +#ifndef __UNISTRAPPENDER_H__ +#define __UNISTRAPPENDER_H__ + +#include "unicode/unistr.h" +#include "unicode/uobject.h" +#include "unicode/utf16.h" +#include "unicode/utypes.h" +#include "cmemory.h" + +U_NAMESPACE_BEGIN + +/** + * An optimization for the slowness of calling UnicodeString::append() + * one character at a time in a loop. It stores appends in a buffer while + * never actually calling append on the unicode string unless the buffer + * fills up or is flushed. + * + * proper usage: + * { + * UnicodeStringAppender appender(astring); + * for (int32_t i = 0; i < 100; ++i) { + * appender.append((UChar) i); + * } + * // appender flushed automatically when it goes out of scope. + * } + */ +class UnicodeStringAppender : public UMemory { +public: + + /** + * dest is the UnicodeString being appended to. It must always + * exist while this instance exists. + */ + UnicodeStringAppender(UnicodeString &dest) : fDest(&dest), fIdx(0) { } + + inline void append(UChar x) { + if (fIdx == UPRV_LENGTHOF(fBuffer)) { + fDest->append(fBuffer, 0, fIdx); + fIdx = 0; + } + fBuffer[fIdx++] = x; + } + + inline void append(UChar32 x) { + if (fIdx >= UPRV_LENGTHOF(fBuffer) - 1) { + fDest->append(fBuffer, 0, fIdx); + fIdx = 0; + } + U16_APPEND_UNSAFE(fBuffer, fIdx, x); + } + + /** + * Ensures that all appended characters have been written out to dest. + */ + inline void flush() { + if (fIdx) { + fDest->append(fBuffer, 0, fIdx); + } + fIdx = 0; + } + + /** + * flush the buffer when we go out of scope. + */ + ~UnicodeStringAppender() { + flush(); + } +private: + UnicodeString *fDest; + int32_t fIdx; + UChar fBuffer[32]; + UnicodeStringAppender(const UnicodeStringAppender &other); + UnicodeStringAppender &operator=(const UnicodeStringAppender &other); +}; + +U_NAMESPACE_END + +#endif |