/*
*******************************************************************************
*
-* Copyright (C) 1999-2007, International Business Machines
+* Copyright (C) 1999-2010, International Business Machines
* Corporation and others. All Rights Reserved.
*
*******************************************************************************
#include "unicode/ustring.h"
#include "unicode/unistr.h"
#include "unicode/ucnv.h"
+#include "ucnv_imp.h"
#include "putilimp.h"
#include "ustr_cnv.h"
#include "ustr_imp.h"
// Constructors
//========================================
+#if !U_CHARSET_IS_UTF8
+
+UnicodeString::UnicodeString(const char *codepageData)
+ : fShortLength(0),
+ fFlags(kShortString)
+{
+ if(codepageData != 0) {
+ doCodepageCreate(codepageData, (int32_t)uprv_strlen(codepageData), 0);
+ }
+}
+
+UnicodeString::UnicodeString(const char *codepageData,
+ int32_t dataLength)
+ : fShortLength(0),
+ fFlags(kShortString)
+{
+ if(codepageData != 0) {
+ doCodepageCreate(codepageData, dataLength, 0);
+ }
+}
+
+// else see unistr.cpp
+#endif
+
UnicodeString::UnicodeString(const char *codepageData,
const char *codepage)
: fShortLength(0),
}
}
-
UnicodeString::UnicodeString(const char *codepageData,
int32_t dataLength,
const char *codepage)
//========================================
// Codeset conversion
//========================================
+
+#if !U_CHARSET_IS_UTF8
+
+int32_t
+UnicodeString::extract(int32_t start,
+ int32_t length,
+ char *target,
+ uint32_t dstSize) const {
+ return extract(start, length, target, dstSize, 0);
+}
+
+// else see unistr.cpp
+#endif
+
int32_t
UnicodeString::extract(int32_t start,
int32_t length,
// pin the indices to legal values
pinIndices(start, length);
+ // We need to cast dstSize to int32_t for all subsequent code.
+ // I don't know why the API was defined with uint32_t but we are stuck with it.
+ // Also, dstSize==0xffffffff means "unlimited" but if we use target+dstSize
+ // as a limit in some functions, it may wrap around and yield a pointer
+ // that compares less-than target.
+ int32_t capacity;
+ if(dstSize < 0x7fffffff) {
+ // Assume that the capacity is real and a limit pointer won't wrap around.
+ capacity = (int32_t)dstSize;
+ } else {
+ // Pin the capacity so that a limit pointer does not wrap around.
+ char *targetLimit = (char *)U_MAX_PTR(target);
+ // U_MAX_PTR(target) returns a targetLimit that is at most 0x7fffffff
+ // greater than target and does not wrap around the top of the address space.
+ capacity = (int32_t)(targetLimit - target);
+ }
+
// create the converter
UConverter *converter;
UErrorCode status = U_ZERO_ERROR;
// just write the NUL if the string length is 0
if(length == 0) {
- if(dstSize >= 0x80000000) {
- // careful: dstSize is unsigned! (0xffffffff means "unlimited")
- // make sure that the NUL-termination works (takes int32_t)
- dstSize=0x7fffffff;
- }
- return u_terminateChars(target, dstSize, 0, &status);
+ return u_terminateChars(target, capacity, 0, &status);
}
// if the codepage is the default, use our cache
// if it is an empty string, then use the "invariant character" conversion
if (codepage == 0) {
+ const char *defaultName = ucnv_getDefaultName();
+ if(UCNV_FAST_IS_UTF8(defaultName)) {
+ return toUTF8(start, length, target, capacity);
+ }
converter = u_getDefaultConverter(&status);
} else if (*codepage == 0) {
// use the "invariant characters" conversion
int32_t destLength;
- // careful: dstSize is unsigned! (0xffffffff means "unlimited")
- if(dstSize >= 0x80000000) {
- destLength = length;
- // make sure that the NUL-termination works (takes int32_t)
- dstSize=0x7fffffff;
- } else if(length <= (int32_t)dstSize) {
+ if(length <= capacity) {
destLength = length;
} else {
- destLength = (int32_t)dstSize;
+ destLength = capacity;
}
u_UCharsToChars(getArrayStart() + start, target, destLength);
- return u_terminateChars(target, (int32_t)dstSize, length, &status);
+ return u_terminateChars(target, capacity, length, &status);
} else {
converter = ucnv_open(codepage, &status);
}
- length = doExtract(start, length, target, (int32_t)dstSize, converter, status);
+ length = doExtract(start, length, target, capacity, converter, status);
// close the converter
if (codepage == 0) {
// create the converter
// if the codepage is the default, use our cache
// if it is an empty string, then use the "invariant character" conversion
- UConverter *converter = (codepage == 0 ?
- u_getDefaultConverter(&status) :
- *codepage == 0 ?
- 0 :
- ucnv_open(codepage, &status));
-
- // if we failed, set the appropriate flags and return
- if(U_FAILURE(status)) {
- setToBogus();
- return;
- }
-
- // perform the conversion
- if(converter == 0) {
+ UConverter *converter;
+ if (codepage == 0) {
+ const char *defaultName = ucnv_getDefaultName();
+ if(UCNV_FAST_IS_UTF8(defaultName)) {
+ setToUTF8(StringPiece(codepageData, dataLength));
+ return;
+ }
+ converter = u_getDefaultConverter(&status);
+ } else if(*codepage == 0) {
// use the "invariant characters" conversion
if(cloneArrayIfNeeded(dataLength, dataLength, FALSE)) {
u_charsToUChars(codepageData, getArrayStart(), dataLength);
setToBogus();
}
return;
+ } else {
+ converter = ucnv_open(codepage, &status);
+ }
+
+ // if we failed, set the appropriate flags and return
+ if(U_FAILURE(status)) {
+ setToBogus();
+ return;
}
- // convert using the real converter
+ // perform the conversion
doCodepageCreate(codepageData, dataLength, converter, status);
if(U_FAILURE(status)) {
setToBogus();
projects / apple / icu.git / blobdiff