lR\$@sdZddd ZdddZdgZddlZddlZddlZddlZddlZd d l m Z d d l m Z Gd dde ZdS)zDBF header definition. TODO: - handle encoding of the character fields (encoding information stored in the DBF header) z$Revision: 1.6 $ z$Date: 2010/09/16 05:06:39 $ DbfHeaderN)fields)getDatec @seZdZdZd+Zd d d d d d d ddZddZeeZddZeeZe ddZ e ddZ e ddZ ddZ e dde ddZ ddZdd Zd!d"Zd#d$Zd%d&Zd'd(Zd)d*Zd S),ra|Dbf header definition. For more information about dbf header format visit `http://www.clicketyclick.dk/databases/xbase/format/dbf.html#DBF_STRUCT` Examples: Create an empty dbf header and add some field definitions: dbfh = DbfHeader() dbfh.addField(("name", "C", 10)) dbfh.addField(("date", "D")) dbfh.addField(DbfNumericFieldDef("price", 5, 2)) Create a dbf header with field definitions: dbfh = DbfHeader([ ("name", "C", 10), ("date", "D"), DbfNumericFieldDef("price", 5, 2), ]) signaturer lastUpdate recordLength recordCount headerLengthchanged_ignore_errorsNrFcCsy||_|dkr!g|_nt||_t||_||_||_||_||_t |j|_ dS)aInitialize instance. Arguments: fields: a list of field definitions; recordLength: size of the records; headerLength: size of the header; recordCount: number of records stored in DBF; signature: version number (aka signature). using 0x03 as a default meaning "File without DBT". for more information about this field visit ``http://www.clicketyclick.dk/databases/xbase/format/dbf.html#DBF_NOTE_1_TARGET`` lastUpdate: date of the DBF's update. this could be a string ('yymmdd' or 'yyyymmdd'), timestamp (int or float), datetime/date value, a sequence (assuming (yyyy, mm, dd, ...)) or an object having callable ``ticks`` field. ignoreErrors: error processing mode for DBF fields (boolean) N) r rlistrr r r r ignoreErrorsboolr)selfrr r r r r rrR/var/www/dbchiro/venv/lib/python3.4/site-packages/tablib/packages/dbfpy3/header.py__init__:s       zDbfHeader.__init__cCs|jtjt|S)z.Return header instance from the string object.) fromStreamioStringIOstr)clsstringrrr fromStringdszDbfHeader.fromStringc CsQ|jd|jd}t|tkrFt|tj}n|}tjd|dd\}}}|d}|dkr|d7}n |d 7}|d ||||d||d |d f}d} |jd}xg|d krL||jd7}tj |dj || } |j | | j } |jd}qW|S)z%Return header object from the stream.r zszDbfHeader.cCs |jjS)N)r month)rrrrr6scCs |jjS)N)r day)rrrrr6scCs4t||_}x|jD]}||_qWdS)z1Update `ignoreErrors` flag on self and all fieldsN)rrrr)rvalue_fieldrrrrszDbfHeader.ignoreErrorscCs|jS)N)r)rrrrr6sdoczError processing mode for DBF field value conversion if set, failing field value conversion will return ``INVALID_VALUE`` instead of raising conversion error. cCsOd|j|j|j|j|jf}|djdd|jD7}|S)NzVersion (signature): 0x%02x Last update: %s Header length: %d Record length: %d Record count: %d FieldName Type Len Dec  cSs g|]}d|jqS)z%10s %4s %3s %3s)Z fieldInfo).0r4rrr s z&DbfHeader.__repr__..)r r r r r joinr)rZ_rvrrr__repr__s  zDbfHeader.__repr__c Gsg}d}x|D]}t|tjr4|}nPt|ddd\}}}} tj|} | ||| d|j}||j7}|j|qW|j|7_|S)ahInternal variant of the `addField` method. This method doesn't set `self.changed` field to True. Return value is a length of the appended records. Note: this method doesn't modify ``recordLength`` and ``headerLength`` fields. Use `addField` instead of this method if you don't exactly know what you're doing. rNr r)N)NNNN) isinstancerZ DbfFieldDeftupler,rlengthappend) rdefsZ_defsZ _recordLengthZ_defr2_nameZ_type_lenZ_dec_clsrrrr-s  &  zDbfHeader._addFieldcGsd|j}|j|j|7_|s9|jd7_nddt|jd|_d|_dS)aAdd field definition to the header. Examples: dbfh.addField( ("name", "C", 20), dbf.DbfCharacterFieldDef("surname", 20), dbf.DbfDateFieldDef("birthdate"), ("member", "L"), ) dbfh.addField(("price", "N", 5, 2)) dbfh.addField(dbf.DbfNumericFieldDef("origprice", 5, 2)) rrTN)r r-lenrr r)rrEZ_oldLenrrraddFields  zDbfHeader.addFieldcCsu|jd|j|jdd|jD}|jdj|jtj|jdd|_dS)z&Encode and write header to the stream.rcSsg|]}|jqSr)toString)r=r4rrrr>s z#DbfHeader.write..s FN) r$writerKrr?encoder(r)r)rr/rrrrrMs  % zDbfHeader.writec Cs?tjd|j|jd|j|j|j|j|jdS)z4Returned 32 chars length string with encoded header.z<4BI2Hilss) r*packr r5r7r8r r r )rrrrrKs  zDbfHeader.toStringcCstjj|_dS)z9Update ``self.lastUpdate`` field with current date value.N)datetimedatetodayr )rrrrsetCurrentDateszDbfHeader.setCurrentDatecCs`t|trQ|j}x>|jD]}|j|kr%|Sq%Wt|n |j|SdS)z9Return a field definition by numeric index or name stringN)rArupperrnameKeyError)ritemrFr:rrr __getitem__s zDbfHeader.__getitem__)z signaturezfieldsz lastUpdatez recordLengthz recordCountz headerLengthzchangedz_ignore_errors)__name__ __module__ __qualname____doc__ __slots__rr classmethodrpropertyr5r7r8rr@r-rJrMrKrTrYrrrrr s0  )         !  ra)r] __version____date____all__rrQr*timer(rLrutilsrobjectrrrrrs