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Field - base class for a field of a collection of statistics
$Id: //eng/vdo-releases/aluminum/src/python/vdo/statistics/Field.py#2 $
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Field is the base class for a field of a statistics structure.
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Convert a camel-cased string to a set of space separated, lower case words.
Preserves uppercase acronyms, so 'launchVDOErrorCount' becomes
'launch VDO error count'.
:param string: The string to convert
:return: The converted string
c S s d| j � j� S )N� )�group�lower)�match� r �/usr/lib/python3.6/Field.py�<lambda>5 s z Field._decamel.<locals>.<lambda>c S s dj | j� �S )Nr
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Convert a string describing how to derive a field's value into a lambda.
:param string The string to convert
:return: An equivalent lambda
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Create a new field.
:param name: The name of the field
:param cType: The class representing the C representation for this field
when sampled via an ioctl
:param **kwargs: Keyword arguments which may be:
available: Specifies python code to apply to other
fields of the parent structure to decide
whether this value is available. Defaults
to True.
derived: Specifies python code to apply to other
fields of the parent structure to derive the
value of this field. Defaults to None.
display: If not True, this field will not be included
in labeled output. Defaults to True.
label: The label for this field. If unspecified, the
label will be derived from the field name.
length: if > 1, indicates this field is an array of
the specified cType, otherwise is is a
scalar. Defaults to 1.
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Extract the value for this field from a sample.
:param stats: The raw stats returned from an ioctl
:param parent: The parent of this field
:return: The value of this field in the current sample
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Label a sampled value for this field.
:param sample: The sampled field value
:param prefix: The prefix for the label
:return: A LabeledValue for a value of this field
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Base class for fields which are integer types.
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__classcell__r r )r? r r; � s r; c s( e Zd Z� fdd�Z� fdd�Z� ZS )� BoolFieldc s t t| �j|tf|� d S )N)r< rA r. �c_byte)r r& r- )r? r r r. � s zBoolField.__init__c s t t| �j||�dkS )Nr )r< rA r0 )r r r )r? r r r0 � s zBoolField.extractSample)r4 r5 r6 r. r0 r@ r r )r? r rA � s rA c s e Zd Z� fdd�Z� ZS )�
Uint8Fieldc s t t| �j|tf|� d S )N)r< rC r. rB )r r& r- )r? r r r. � s zUint8Field.__init__)r4 r5 r6 r. r@ r r )r? r rC � s rC c s e Zd Z� fdd�Z� ZS )� Uint32Fieldc s t t| �j|tf|� d S )N)r< rD r. Zc_uint)r r& r- )r? r r r. � s zUint32Field.__init__)r4 r5 r6 r. r@ r r )r? r rD � s rD c s e Zd Z� fdd�Z� ZS )� Uint64Fieldc s t t| �j|tf|� d S )N)r< rE r. Z c_ulonglong)r r& r- )r? r r r. � s zUint64Field.__init__)r4 r5 r6 r. r@ r r )r? r rE � s rE c s e Zd ZdZ� fdd�Z� ZS )�FloatingPointFieldz;
Base class for fields which are floating point types.
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FloatFieldc s t t| �j|tf|� d S )N)r< rH r. Zc_float)r r& r- )r? r r r. � s zFloatField.__init__)r4 r5 r6 r. r@ r r )r? r rH � s rH c s e Zd Z� fdd�Z� ZS )� StringFieldc s t t| �j|tf|� d S )N)r< rI r. Zc_char)r r& r- )r? r r r. � s zStringField.__init__)r4 r5 r6 r. r@ r r )r? r rI � s rI c @ sp e Zd ZdZdd� Zdd� Zdd� Zdd � Zd
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A value for numeric statistics which are currently not available; prints
as 'N/A'.
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