1 /* 2 ********************************************************************** 3 * Copyright (C) 2001-2007, International Business Machines 4 * Corporation and others. All Rights Reserved. 5 ********************************************************************** 6 * FILE NAME : ustream.cpp 7 * 8 * Modification History: 9 * 10 * Date Name Description 11 * 06/25/2001 grhoten Move iostream from unistr.h to here 12 ****************************************************************************** 13 */ 14 15 16 #include "unicode/utypes.h" 17 #include "unicode/uobject.h" 18 #include "unicode/ustream.h" 19 #include "unicode/ucnv.h" 20 #include "unicode/uchar.h" 21 #include "ustr_cnv.h" 22 #include <string.h> 23 24 // console IO 25 26 #if U_IOSTREAM_SOURCE >= 198506 27 28 #if U_IOSTREAM_SOURCE >= 199711 29 #define STD_NAMESPACE std:: 30 #else 31 #define STD_NAMESPACE 32 #endif 33 34 #define STD_OSTREAM STD_NAMESPACE ostream 35 #define STD_ISTREAM STD_NAMESPACE istream 36 37 U_NAMESPACE_BEGIN 38 39 U_IO_API STD_OSTREAM & U_EXPORT2 40 operator<<(STD_OSTREAM& stream, const UnicodeString& str) 41 { 42 if(str.length() > 0) { 43 char buffer[200]; 44 UConverter *converter; 45 UErrorCode errorCode = U_ZERO_ERROR; 46 47 // use the default converter to convert chunks of text 48 converter = u_getDefaultConverter(&errorCode); 49 if(U_SUCCESS(errorCode)) { 50 const UChar *us = str.getBuffer(); 51 const UChar *uLimit = us + str.length(); 52 char *s, *sLimit = buffer + sizeof(buffer); 53 do { 54 errorCode = U_ZERO_ERROR; 55 s = buffer; 56 ucnv_fromUnicode(converter, &s, sLimit, &us, uLimit, 0, FALSE, &errorCode); 57 58 // write this chunk 59 if(s > buffer) { 60 stream.write(buffer, (int32_t)(s - buffer)); 61 } 62 } while(errorCode == U_BUFFER_OVERFLOW_ERROR); 63 u_releaseDefaultConverter(converter); 64 } 65 } 66 67 /* stream.flush();*/ 68 return stream; 69 } 70 71 U_IO_API STD_ISTREAM & U_EXPORT2 72 operator>>(STD_ISTREAM& stream, UnicodeString& str) 73 { 74 // This is like ICU status checking. 75 if (stream.fail()) { 76 return stream; 77 } 78 79 /* ipfx should eat whitespace when ios::skipws is set */ 80 UChar uBuffer[16]; 81 char buffer[16]; 82 int32_t idx = 0; 83 UConverter *converter; 84 UErrorCode errorCode = U_ZERO_ERROR; 85 86 // use the default converter to convert chunks of text 87 converter = u_getDefaultConverter(&errorCode); 88 if(U_SUCCESS(errorCode)) { 89 UChar *us = uBuffer; 90 const UChar *uLimit = uBuffer + sizeof(uBuffer)/sizeof(*uBuffer); 91 const char *s, *sLimit; 92 char ch; 93 UChar ch32; 94 UBool initialWhitespace = TRUE; 95 UBool continueReading = TRUE; 96 97 /* We need to consume one byte at a time to see what is considered whitespace. */ 98 while (continueReading) { 99 ch = stream.get(); 100 if (stream.eof()) { 101 // The EOF is only set after the get() of an unavailable byte. 102 if (!initialWhitespace) { 103 stream.clear(stream.eofbit); 104 } 105 continueReading = FALSE; 106 } 107 sLimit = &ch + (int)continueReading; 108 us = uBuffer; 109 s = &ch; 110 errorCode = U_ZERO_ERROR; 111 /* 112 Since we aren't guaranteed to see the state before this call, 113 this code won't work on stateful encodings like ISO-2022 or an EBCDIC stateful encoding. 114 We flush on the last byte to ensure that we output truncated multibyte characters. 115 */ 116 ucnv_toUnicode(converter, &us, uLimit, &s, sLimit, 0, !continueReading, &errorCode); 117 if(U_FAILURE(errorCode)) { 118 /* Something really bad happened. setstate() isn't always an available API */ 119 stream.clear(stream.failbit); 120 goto STOP_READING; 121 } 122 /* Was the character consumed? */ 123 if (us != uBuffer) { 124 /* Reminder: ibm-1390 & JISX0213 can output 2 Unicode code points */ 125 int32_t uBuffSize = us-uBuffer; 126 int32_t uBuffIdx = 0; 127 while (uBuffIdx < uBuffSize) { 128 U16_NEXT(uBuffer, uBuffIdx, uBuffSize, ch32); 129 if (u_isWhitespace(ch32)) { 130 if (!initialWhitespace) { 131 buffer[idx++] = ch; 132 while (idx > 0) { 133 stream.putback(buffer[--idx]); 134 } 135 goto STOP_READING; 136 } 137 /* else skip intialWhitespace */ 138 } 139 else { 140 if (initialWhitespace) { 141 /* 142 When initialWhitespace is TRUE, we haven't appended any 143 character yet. This is where we truncate the string, 144 to avoid modifying the string before we know if we can 145 actually read from the stream. 146 */ 147 str.truncate(0); 148 initialWhitespace = FALSE; 149 } 150 str.append(ch32); 151 } 152 } 153 idx = 0; 154 } 155 else { 156 buffer[idx++] = ch; 157 } 158 } 159 STOP_READING: 160 u_releaseDefaultConverter(converter); 161 } 162 163 /* stream.flush();*/ 164 return stream; 165 } 166 167 U_NAMESPACE_END 168 169 #endif 170 171