本文整理汇总了C++中DataType::isAdjustableLength方法的典型用法代码示例。如果您正苦于以下问题：C++ DataType::isAdjustableLength方法的具体用法？C++ DataType::isAdjustableLength怎么用？C++ DataType::isAdjustableLength使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类DataType的用法示例。
在下文中一共展示了DataType::isAdjustableLength方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: create
result_t SingleDataField::create(const string id, const unsigned char length,
const string name, const string comment, const string unit,
const PartType partType, int divisor, map<unsigned int, string> values,
const string constantValue, const bool verifyValue, SingleDataField* &returnField)
{
DataType* dataType = DataTypeList::getInstance()->get(id, length==REMAIN_LEN ? (unsigned char)0 : length);
if (!dataType) {
return RESULT_ERR_NOTFOUND;
}
unsigned char bitCount = dataType->getBitCount();
unsigned char byteCount = (unsigned char)((bitCount + 7) / 8);
if (dataType->isAdjustableLength()) {
// check length
if ((bitCount % 8) != 0) {
if (length == 0) {
bitCount = 1; // default bit count: 1 bit
} else if (length <= bitCount) {
bitCount = length;
} else {
return RESULT_ERR_OUT_OF_RANGE; // invalid length
}
byteCount = (unsigned char)((bitCount + 7) / 8);
} else if (length == 0) {
byteCount = 1; //default byte count: 1 byte
} else if (length <= byteCount || length == REMAIN_LEN) {
byteCount = length;
} else {
return RESULT_ERR_OUT_OF_RANGE; // invalid length
}
}
if (!constantValue.empty()) {
returnField = new ConstantDataField(name, comment, unit, dataType, partType, byteCount, constantValue, verifyValue);
return RESULT_OK;
}
if (dataType->isNumeric()) {
NumberDataType* numType = (NumberDataType*)dataType;
if (values.empty() && numType->hasFlag(DAY)) {
for (unsigned int i = 0; i < sizeof(dayNames) / sizeof(dayNames[0]); i++)
values[numType->getMinValue() + i] = dayNames[i];
}
result_t result = numType->derive(divisor, bitCount, numType);
if (result!=RESULT_OK) {
return result;
}
if (values.empty()) {
returnField = new SingleDataField(name, comment, unit, numType, partType, byteCount);
return RESULT_OK;
}
if (values.begin()->first < numType->getMinValue() || values.rbegin()->first > numType->getMaxValue()) {
return RESULT_ERR_OUT_OF_RANGE;
}
returnField = new ValueListDataField(name, comment, unit, numType, partType, byteCount, values);
return RESULT_OK;
}
if (divisor != 0 || !values.empty()) {
return RESULT_ERR_INVALID_ARG; // cannot set divisor or values for string field
}
returnField = new SingleDataField(name, comment, unit, (StringDataType*)dataType, partType, byteCount);
return RESULT_OK;
}