333 lines
8.0 KiB
C++
333 lines
8.0 KiB
C++
/*
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**********************************************************************
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* Copyright (C) 2001, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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* FILE NAME : ustream.cpp
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*
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* Modification History:
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*
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* Date Name Description
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* 06/25/2001 grhoten Move iostream from unistr.h to here
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******************************************************************************
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*/
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#include "unicode/utypes.h"
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#include "unicode/uobject.h"
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#include "unicode/ustream.h"
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#include "unicode/ucnv.h"
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#include "unicode/uchar.h"
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#include "ustr_imp.h"
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#include <string.h>
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// console IO
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#if U_IOSTREAM_SOURCE >= 198506
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#if U_IOSTREAM_SOURCE >= 199711
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#define STD_NAMESPACE std::
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#else
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#define STD_NAMESPACE
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#endif
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#define STD_OSTREAM STD_NAMESPACE ostream
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#define STD_ISTREAM STD_NAMESPACE istream
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U_USTDIO_API STD_OSTREAM &
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operator<<(STD_OSTREAM& stream, const UnicodeString& str)
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{
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if(str.length() > 0) {
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char buffer[200];
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UConverter *converter;
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UErrorCode errorCode = U_ZERO_ERROR;
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// use the default converter to convert chunks of text
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converter = u_getDefaultConverter(&errorCode);
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if(U_SUCCESS(errorCode)) {
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const UChar *us = str.getBuffer();
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const UChar *uLimit = us + str.length();
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char *s, *sLimit = buffer + sizeof(buffer);
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do {
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errorCode = U_ZERO_ERROR;
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s = buffer;
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ucnv_fromUnicode(converter, &s, sLimit, &us, uLimit, 0, FALSE, &errorCode);
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// write this chunk
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if(s > buffer) {
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stream.write(buffer, s - buffer);
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}
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} while(errorCode == U_BUFFER_OVERFLOW_ERROR);
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u_releaseDefaultConverter(converter);
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}
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}
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/* stream.flush();*/
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return stream;
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}
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U_USTDIO_API STD_ISTREAM &
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operator>>(STD_ISTREAM& stream, UnicodeString& str)
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{
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/* ipfx should eat whitespace when ios::skipws is set */
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UChar uBuffer[16];
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char buffer[16];
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int32_t idx = 0;
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UConverter *converter;
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UErrorCode errorCode = U_ZERO_ERROR;
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str.truncate(0);
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// use the default converter to convert chunks of text
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converter = u_getDefaultConverter(&errorCode);
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if(U_SUCCESS(errorCode)) {
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UChar *us = uBuffer;
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const UChar *uLimit = uBuffer + sizeof(uBuffer)/sizeof(*uBuffer);
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const char *s, *sLimit;
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char ch;
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UChar ch32;
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UBool intialWhitespace = TRUE;
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/* We need to consume one byte at a time to see what is considered whitespace. */
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while (!stream.eof()) {
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ch = stream.get();
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sLimit = &ch + 1;
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errorCode = U_ZERO_ERROR;
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us = uBuffer;
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s = &ch;
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ucnv_toUnicode(converter, &us, uLimit, &s, sLimit, 0, FALSE, &errorCode);
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if(U_FAILURE(errorCode)) {
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/* Something really bad happened */
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return stream;
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}
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/* Was the character consumed? */
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if (us != uBuffer) {
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UTF_GET_CHAR_SAFE(uBuffer, 0, 0, sizeof(uBuffer), ch32, FALSE);
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if (u_isWhitespace(ch32)) {
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if (!intialWhitespace) {
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buffer[idx++] = ch;
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while (idx > 0) {
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stream.putback(buffer[--idx]);
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}
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break;
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}
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/* else skip intialWhitespace */
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}
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else {
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str.append(ch32);
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intialWhitespace = FALSE;
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}
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idx = 0;
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}
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else {
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buffer[idx++] = ch;
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}
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}
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u_releaseDefaultConverter(converter);
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}
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/* stream.flush();*/
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return stream;
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}
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#endif
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#if 0
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/* UnicodeStringStreamer internal API may be useful for future reference */
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#ifndef UNISTRM_H
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#define UNISTRM_H
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#include "filestrm.h"
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#include "umemstrm.h"
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#include "unicode/unistr.h"
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class U_COMMON_API UnicodeStringStreamer /* not : public UObject because all methods are static */ {
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public:
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static void streamIn(UnicodeString* string, FileStream* is);
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static void streamOut(const UnicodeString* string, FileStream* os);
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static void streamIn(UnicodeString* string, UMemoryStream* is);
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static void streamOut(const UnicodeString* string, UMemoryStream* os);
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};
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#endif
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//========================================
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// Streaming (to be removed)
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//========================================
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#include "unistrm.h"
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#include "filestrm.h"
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inline uint8_t
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uprv_hibyte(uint16_t x)
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{ return (uint8_t)(x >> 8); }
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inline uint8_t
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uprv_lobyte(uint16_t x)
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{ return (uint8_t)(x & 0xff); }
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inline uint16_t
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uprv_hiword(uint32_t x)
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{ return (uint16_t)(x >> 16); }
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inline uint16_t
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uprv_loword(uint32_t x)
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{ return (uint16_t)(x & 0xffff); }
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inline void
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writeLong(FileStream *os,
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int32_t x)
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{
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uint16_t word = uprv_hiword((uint32_t)x);
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T_FileStream_putc(os, uprv_hibyte(word));
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T_FileStream_putc(os, uprv_lobyte(word));
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word = uprv_loword((uint32_t)x);
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T_FileStream_putc(os, uprv_hibyte(word));
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T_FileStream_putc(os, uprv_lobyte(word));
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}
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inline int32_t
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readLong(FileStream *is)
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{
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int32_t x = T_FileStream_getc(is);
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x = (x << 8) | T_FileStream_getc(is);
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x = (x << 8) | T_FileStream_getc(is);
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x = (x << 8) | T_FileStream_getc(is);
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return x;
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}
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inline void
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writeUChar(FileStream *os,
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UChar c)
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{
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T_FileStream_putc(os, uprv_hibyte(c));
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T_FileStream_putc(os, uprv_lobyte(c));
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}
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inline UChar
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readUChar(FileStream *is)
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{
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UChar c = (UChar)T_FileStream_getc(is);
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return (UChar)((c << 8) | T_FileStream_getc(is));
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}
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void
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UnicodeStringStreamer::streamOut(const UnicodeString *s,
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FileStream *os)
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{
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if(!T_FileStream_error(os)) {
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writeLong(os, s->fLength);
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}
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const UChar *c = s->getArrayStart();
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const UChar *end = c + s->fLength;
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while(c != end && ! T_FileStream_error(os)) {
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writeUChar(os, *c++);
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}
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}
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void
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UnicodeStringStreamer::streamIn(UnicodeString *s,
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FileStream *is)
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{
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int32_t newSize;
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// handle error conditions
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if(T_FileStream_error(is) || T_FileStream_eof(is)) {
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s->setToBogus();
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return;
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}
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newSize = readLong(is);
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if((newSize < 0) || T_FileStream_error(is)
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|| ((newSize > 0) && T_FileStream_eof(is))) {
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s->setToBogus(); //error condition
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return;
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}
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// clone s's array, if needed
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if(!s->cloneArrayIfNeeded(newSize, newSize, FALSE)) {
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return;
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}
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UChar *c = s->getArrayStart();
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UChar *end = c + newSize;
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while(c < end && ! (T_FileStream_error(is) || T_FileStream_eof(is))) {
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*c++ = readUChar(is);
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}
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// couldn't read all chars
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if(c < end) {
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s->setToBogus();
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return;
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}
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s->fLength = newSize;
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}
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void
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UnicodeStringStreamer::streamOut(const UnicodeString *s,
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UMemoryStream *os)
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{
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if(!uprv_mstrm_error(os)) {
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uprv_mstrm_write(os, (uint8_t*)&s->fLength, (int32_t)sizeof(s->fLength));
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}
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const UChar *c = s->getArrayStart();
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const UChar *end = c + s->fLength;
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while(c != end && ! uprv_mstrm_error(os)) {
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uprv_mstrm_write(os, (uint8_t*)c, (int32_t)sizeof(*c));
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c++;
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}
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}
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void
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UnicodeStringStreamer::streamIn(UnicodeString *s,
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UMemoryStream *is)
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{
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int32_t newSize;
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// handle error conditions
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if(uprv_mstrm_error(is) || uprv_mstrm_eof(is)) {
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s->setToBogus();
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return;
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}
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uprv_mstrm_read(is, (uint8_t *)&newSize, (int32_t)sizeof(int32_t));
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if((newSize < 0) || uprv_mstrm_error(is)
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|| ((newSize > 0) && uprv_mstrm_eof(is))) {
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s->setToBogus(); //error condition
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return;
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}
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// clone s's array, if needed
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if(!s->cloneArrayIfNeeded(newSize, newSize, FALSE)) {
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return;
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}
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UChar *c = s->getArrayStart();
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UChar *end = c + newSize;
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while(c < end && ! (uprv_mstrm_error(is) || uprv_mstrm_eof(is))) {
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uprv_mstrm_read(is, (uint8_t *)c, (int32_t)sizeof(*c));
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c++;
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}
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// couldn't read all chars
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if(c < end) {
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s->setToBogus();
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return;
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}
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s->fLength = newSize;
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}
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#endif
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