101 lines
2.5 KiB
C++
101 lines
2.5 KiB
C++
/*
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******************************************************************************
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*
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* Copyright (C) 2010, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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******************************************************************************
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*
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* File decnumstr.cpp
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*
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*/
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#include "unicode/utypes.h"
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#include "decnumstr.h"
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#include "cmemory.h"
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#include "uassert.h"
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U_NAMESPACE_BEGIN
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DecimalNumberString::DecimalNumberString() {
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fLength = 0;
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fText[0] = 0;
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}
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DecimalNumberString::~DecimalNumberString() {
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}
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DecimalNumberString::DecimalNumberString(const StringPiece &source, UErrorCode &status) {
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fLength = 0;
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fText[0] = 0;
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append(source, status);
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}
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DecimalNumberString & DecimalNumberString::append(char c, UErrorCode &status) {
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if (ensureCapacity(fLength + 2, status) == FALSE) {
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return *this;
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}
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fText[fLength++] = c;
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fText[fLength] = 0;
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return *this;
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}
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DecimalNumberString &DecimalNumberString::append(const StringPiece &str, UErrorCode &status) {
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int32_t sLength = str.length();
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if (ensureCapacity(fLength + sLength + 1, status) == FALSE) {
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return *this;
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}
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uprv_memcpy(&fText[fLength], str.data(), sLength);
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fLength += sLength;
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fText[fLength] = 0;
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return *this;
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}
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char & DecimalNumberString::operator [] (int32_t index) {
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U_ASSERT(index>=0 && index<fLength);
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return fText[index];
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}
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const char & DecimalNumberString::operator [] (int32_t index) const {
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U_ASSERT(index>=0 && index<fLength);
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return fText[index];
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}
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int32_t DecimalNumberString::length() const {
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return fLength;
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}
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void DecimalNumberString::setLength(int32_t length, UErrorCode &status) {
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if (ensureCapacity(length+1, status) == FALSE) {
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return;
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}
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if (length > fLength) {
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uprv_memset(&fText[fLength], length - fLength, 0);
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}
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fLength = length;
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fText[fLength] = 0;
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}
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DecimalNumberString::operator StringPiece() const {
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return StringPiece(fText, fLength);
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}
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UBool DecimalNumberString::ensureCapacity(int32_t neededSize, UErrorCode &status) {
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if (U_FAILURE(status)) {
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return FALSE;
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}
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if (fText.getCapacity() < neededSize) {
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char *newBuf = fText.resize(neededSize, fText.getCapacity());
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if (newBuf == NULL) {
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status = U_MEMORY_ALLOCATION_ERROR;
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return FALSE;
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}
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U_ASSERT(fText.getCapacity() >= neededSize);
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U_ASSERT(fText.getAlias() == newBuf);
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}
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return TRUE;
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}
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U_NAMESPACE_END
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