Mercurial > illumos > onarm
view usr/src/cmd/man/src/util/nsgmls.src/lib/Fixed2CodingSystem.cxx @ 4:1a15d5aaf794
synchronized with onnv_86 (6202) in onnv-gate
author | Koji Uno <koji.uno@sun.com> |
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date | Mon, 31 Aug 2009 14:38:03 +0900 |
parents | c9caec207d52 |
children |
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// Copyright (c) 1994 James Clark // See the file COPYING for copying permission. #pragma ident "%Z%%M% %I% %E% SMI" // This uses a big endian byte order irrespective of host byte order. // Nothing special is done with FEFF/FFFE. #include "splib.h" #ifdef SP_MULTI_BYTE #include "Fixed2CodingSystem.h" #include "macros.h" #ifdef SP_NAMESPACE namespace SP_NAMESPACE { #endif class Fixed2Decoder : public Decoder { public: Fixed2Decoder(); size_t decode(Char *to, const char *from, size_t fromLen, const char **rest); Boolean convertOffset(unsigned long &offset) const; }; class Fixed2Encoder : public Encoder { public: Fixed2Encoder(); ~Fixed2Encoder(); void output(Char *, size_t, OutputByteStream *); void output(const Char *, size_t, OutputByteStream *); private: void allocBuf(size_t); char *buf_; size_t bufSize_; }; Decoder *Fixed2CodingSystem::makeDecoder() const { return new Fixed2Decoder; } Encoder *Fixed2CodingSystem::makeEncoder() const { return new Fixed2Encoder; } unsigned Fixed2CodingSystem::fixedBytesPerChar() const { return 2; } Fixed2Decoder::Fixed2Decoder() : Decoder(2) { } size_t Fixed2Decoder::decode(Char *to, const char *from, size_t fromLen, const char **rest) { #ifdef SP_BIG_ENDIAN if (sizeof(Char) == 2 && from == (char *)to) { *rest = from + (fromLen & ~1); return fromLen/2; } #endif fromLen &= ~1; *rest = from + fromLen; for (size_t n = fromLen; n > 0; n -= 2) { *to++ = ((unsigned char)from[0] << 8) + (unsigned char)from[1]; from += 2; } return fromLen/2; } Boolean Fixed2Decoder::convertOffset(unsigned long &n) const { n *= 2; return true; } Fixed2Encoder::Fixed2Encoder() : buf_(0), bufSize_(0) { } Fixed2Encoder::~Fixed2Encoder() { delete [] buf_; } void Fixed2Encoder::allocBuf(size_t n) { if (bufSize_ < n) { delete [] buf_; buf_ = new char[bufSize_ = n]; } } void Fixed2Encoder::output(Char *s, size_t n, OutputByteStream *sb) { #ifdef SP_BIG_ENDIAN if (sizeof(Char) == 2) { sb->sputn((char *)s, n*2); return; } #endif ASSERT(sizeof(Char) >= 2); char *p = (char *)s; for (size_t i = 0; i < n; i++) { Char c = s[i]; *p++ = (c >> 8) & 0xff; *p++ = c & 0xff; } sb->sputn((char *)s, n*2); } void Fixed2Encoder::output(const Char *s, size_t n, OutputByteStream *sb) { #ifdef SP_BIG_ENDIAN if (sizeof(Char) == 2) { sb->sputn((char *)s, n*2); return; } #endif allocBuf(n*2); for (size_t i = 0; i < n; i++) { buf_[i*2] = (s[i] >> 8) & 0xff; buf_[i*2 + 1] = s[i] & 0xff; } sb->sputn(buf_, n*2); } #ifdef SP_NAMESPACE } #endif #else /* not SP_MULTI_BYTE */ #ifndef __GNUG__ static char non_empty_translation_unit; // sigh #endif #endif /* not SP_MULTI_BYTE */