xFdZddlmZddlZddlZddlZddlZddlm Z m Z m Z ddddddddZ ddiZ dZdZd Zd Zd Zd Zd ZGddej*j,ZGddeZGddeZy)zTokenize DNS master file format)StringION)long text_type binary_typeT)   ;()"rceZdZdZy)UngetBufferFullzDAn attempt was made to unget a token when the unget buffer was full.N)__name__ __module__ __qualname____doc__ lib/third_party/dns/tokenizer.pyrr0sNrrcreZdZdZddZdZdZdZdZdZ dZ d Z d Z d Z d Zd ZdZdZdZdZy)TokenzA DNS master file format token. ttype: The token type value: The token value has_escape: Does the token value contain escapes? c.||_||_||_y)zInitialize a token instance.N)ttypevalue has_escape)selfr r!r"s r__init__zToken.__init__<s  $rc(|jtk(SN)r EOFr#s ris_eofz Token.is_eofCzzS  rc(|jtk(Sr&)r EOLr(s ris_eolz Token.is_eolFr*rc(|jtk(Sr&)r WHITESPACEr(s r is_whitespacezToken.is_whitespaceIzzZ''rc(|jtk(Sr&)r IDENTIFIERr(s r is_identifierzToken.is_identifierLr1rc(|jtk(Sr&)r QUOTED_STRINGr(s ris_quoted_stringzToken.is_quoted_stringOszz]**rc(|jtk(Sr&)r COMMENTr(s r is_commentzToken.is_commentRszzW$$rc(|jtk(Sr&)r DELIMITERr(s r is_delimiterzToken.is_delimiterUszzY&&rcR|jtk(xs|jtk(Sr&)r r,r'r(s r is_eol_or_eofzToken.is_eol_or_eofXszzS 5DJJ#$55rct|tsy|j|jk(xr|j|jk(S)NF isinstancerr r!r#others r__eq__z Token.__eq__[s9%' ekk)* ekk) +rct|tsy|j|jk7xs|j|jk7S)NTrArCs r__ne__z Token.__ne__as9%' ekk)* ekk) +rc8d|j|jfzS)Nz%d "%s")r r!r(s r__str__z Token.__str__gsDJJ 333rc|js|Sd}t|j}d}||kr;|j|}|dz }|dk(r||k\rtjj |j|}|dz }|j r||k\rtjj |j|}|dz }||k\rtjj |j|}|dz }|j r|j stjjtt|dzt|dzzt|z}||z }||kr;t|j|S)Nrr\d ) r"lenr!dns exception UnexpectedEndisdigit SyntaxErrorchrintrr )r# unescapedlicc2c3s runescapezToken.unescapejsGK  O !e 1 A FADy6--555JJqMQ99;Av!mm999ABFAAv!mm999ABFAJJLRZZ\!mm777CFSL3r7R<7#b'ABA NI)!e*TZZ++rcy)Nrrr(s r__len__z Token.__len__srcDt|j|jfSr&)iterr r!r(s r__iter__zToken.__iter__sTZZ,--rcR|dk(r |jS|dk(r |jSt)Nrr)r r! IndexError)r#rYs r __getitem__zToken.__getitem__s* 6::  !V::  rN)rKF)rrrrr$r)r-r0r4r7r:r=r?rErGrIr]r_rbrerrrrr4sW%!!((+%'6+ + 4,>.rrceZdZdZej dfdZdZdZdZ dZ ddZ d Z d Z e Zd Zdd Zd ZddZdZddZddZddZdZdZy) TokenizeradA DNS master file format tokenizer. A token object is basically a (type, value) tuple. The valid types are EOF, EOL, WHITESPACE, IDENTIFIER, QUOTED_STRING, COMMENT, and DELIMITER. file: The file to tokenize ungotten_char: The most recently ungotten character, or None. ungotten_token: The most recently ungotten token, or None. multiline: The current multiline level. This value is increased by one every time a '(' delimiter is read, and decreased by one every time a ')' delimiter is read. quoting: This variable is true if the tokenizer is currently reading a quoted string. eof: This variable is true if the tokenizer has encountered EOF. delimiters: The current delimiter dictionary. line_number: The current line number filename: A filename that will be returned by the where() method. NcXt|trt|}|Jd}nGt|trt|j }|d}n||t j urd}nd}||_d|_d|_ d|_ d|_ d|_ t|_d|_||_y)aEInitialize a tokenizer instance. f: The file to tokenize. The default is sys.stdin. This parameter may also be a string, in which case the tokenizer will take its input from the contents of the string. filename: the name of the filename that the where() method will return. NzzzrFr)rBrrrdecodesysstdinfile ungotten_charungotten_token multilinequotingeof _DELIMITERS delimiters line_numberfilename)r#frus rr$zTokenizer.__init__s a # A% ; '$A% >(H'H !" %  rc|jU|jrd}|S|jjd}|dk(r d|_|S|dk(r|xjdz c_|S|j}d|_|S)z%Read a character from input. NrKrTr )rmrqrlreadrtr#rZs r _get_charzTokenizer._get_chars    %xxIINN1%7#DH  $Y$$)$""A!%D rc2|j|jfS)zReturn the current location in the input. Returns a (string, int) tuple. The first item is the filename of the input, the second is the current line number. )rurtr(s rwherezTokenizer.wheres t//00rc6|jt||_y)a%Unget a character. The unget buffer for characters is only one character large; it is an error to try to unget a character when the unget buffer is not empty. c: the character to unget raises UngetBufferFull: there is already an ungotten char N)rmrrys r _unget_charzTokenizer._unget_chars    )! !rcd} |j}|dk7r)|dk7r$|dk7s |js|j||S|dz }D)aFConsume input until a non-whitespace character is encountered. The non-whitespace character is then ungotten, and the number of whitespace characters consumed is returned. If the tokenizer is in multiline mode, then newlines are whitespace. Returns the number of characters skipped. rrr r r)rzror~)r#skippedrZs rskip_whitespacezTokenizer.skip_whitespacesS ACxAIIdnn$$Q'"N qLG rc|j=|j}d|_|jr|r|S|jr|r|S|S|j}|r|dkDrt t dSd}t }d} |j}|dk(s||jvr|dk(r&|jrtjj|dk(r|tk7r|dk(r&|xjdz c_|j|d k(rO|jdkrtjj|xjdzc_|j|d k(rJ|jsd|_ t |_t} d|_ t"|_|j.|d k(rt t$d S|d k(r |j}|d k(s|dk(rn||z }!|r!|j'|t t(|S|dk(r:|jrtjjd t t*S|jr|jd}t t$d S|}t,}n|j'|n|jr5|dk(r |j}|dk(rtjj|j/r/|j}|dk(rtjj|j} |dk(rtjj|j/r| j/stjjt1t3|dzt3|dzzt3| z}nd|d k(r_tjjd|dk(r;||z }d}|j}|dk(s|d k(rtjj||z }|dk(r:|tk7r1|jrtjjd t*}t |||S)aGet the next token. want_leading: If True, return a WHITESPACE token if the first character read is whitespace. The default is False. want_comment: If True, return a COMMENT token if the first token read is a comment. The default is False. Raises dns.exception.UnexpectedEnd: input ended prematurely Raises dns.exception.SyntaxError: input was badly formed Returns a Token. NrrrKFTr rr rr r zunbalanced parenthesesrLrMrNznewline in quoted string)rnr0r:rrr/r3rzrsrprPrQrRr6rorT_QUOTING_DELIMITERSrrr,r~r9r'r<rSrUrV) r# want_leading want_commenttokenrr r"rZr[r\s rgetz Tokenizer.gets    *''E"&D ""$ L!!# L &&( GaKS) )  ABw!t.7t||--555B;5M#9Cx!+,,. c>>Q."%--";";;!+,,. c#||+/DL.ADO$1E$+0DL.9DO 002$d$S$//c $ 0A DyAG %!QJE  ( ,,Q/#(%#88"W#~~&)mm&?&?$<'>!>#(:-!^^ 002$&E$#(d#33 !" )$$Q'9(ABw!mm999yy{!^^-8"%--"="==!^^-7"%--"="== " "%--";";;A s2w| ;c"g EF$Y--334NOOd  ! NN$7a4i--555 QJEkl B;5M1~~mm//0HIIEUE:..rc6|jt||_y)aUnget a token. The unget buffer for tokens is only one token large; it is an error to try to unget a token when the unget buffer is not empty. token: the token to unget Raises UngetBufferFull: there is already an ungotten token N)rnrr#rs rungetzTokenizer.ungets    *! !#rcR|j}|jrt|S)zHReturn the next item in an iteration. Returns a Token. )rr) StopIterationrs rnextzTokenizer.nexts#   <<>  rc|Sr&rr(s rrbzTokenizer.__iter__s rc:|jj}|jstjj d|j jstjj dt|j |S)zRead the next token and interpret it as an integer. Raises dns.exception.SyntaxError if not an integer. Returns an int. expecting an identifierexpecting an integer) rr]r4rPrQrTr!rSrV)r#basers rget_intzTokenizer.get_intsq ##%""$--++,EF F{{""$--++,BC C5;;%%rc~|j}|dks|dkDr"tjjd|z|S)zRead the next token and interpret it as an 8-bit unsigned integer. Raises dns.exception.SyntaxError if not an 8-bit unsigned integer. Returns an int. rz#%d is not an unsigned 8-bit integerrrPrQrT)r#r!s r get_uint8zTokenizer.get_uint8s@  19 --++5=? ? rc|j|}|dks|dkDrI|dk(r"tjjd|ztjjd|z|S)zRead the next token and interpret it as a 16-bit unsigned integer. Raises dns.exception.SyntaxError if not a 16-bit unsigned integer. Returns an int. )rriz*%o is not an octal unsigned 16-bit integerz$%d is not an unsigned 16-bit integerr)r#rr!s r get_uint16zTokenizer.get_uint16sq $ ' 19 qymm//@5HJJmm//:UBDD rc|jj}|jstjj d|j jstjj dt|j }|dks|tdkDr"tjj d|z|S)zRead the next token and interpret it as a 32-bit unsigned integer. Raises dns.exception.SyntaxError if not a 32-bit unsigned integer. Returns an int. rrrlz$%d is not an unsigned 32-bit integer) rr]r4rPrQrTr!rSr)r#rr!s r get_uint32zTokenizer.get_uint32s ##%""$--++,EF F{{""$--++,BC CU[[! 19Z 00--++6>@ @ rc|jj}|js/|jstj j d|jS)zRead the next token and interpret it as a string. Raises dns.exception.SyntaxError if not a string. Returns a string. zexpecting a string)rr]r4r7rPrQrTr!r#originrs r get_stringzTokenizer.get_stringsO ##%##%)?)?)A--++,@A A{{rc|jj}|jstjj d|j S)zRead the next token, which should be an identifier. Raises dns.exception.SyntaxError if not an identifier. Returns a string. r)rr]r4rPrQrTr!rs rget_identifierzTokenizer.get_identifiersD ##%""$--++,EF F{{rc|j}|jstjj dtj j |j|S)zRead the next token and interpret it as a DNS name. Raises dns.exception.SyntaxError if not a name. Returns a dns.name.Name. r)rr4rPrQrTname from_textr!rs rget_namezTokenizer.get_namesL ""$--++,EF Fxx!!%++v66rc|j}|js8tjj d|j |j fz|j S)znRead the next token and raise an exception if it isn't EOL or EOF. Returns a string. z expected EOL or EOF, got %d "%s")rr?rPrQrTr r!rs rget_eolzTokenizer.get_eol!s\ ""$--++2ekk6;kk6CCD D{{rc|jj}|jstjj dtj j|jS)zRead the next token and interpret it as a DNS TTL. Raises dns.exception.SyntaxError or dns.ttl.BadTTL if not an identifier or badly formed. Returns an int. r) rr]r4rPrQrTttlrr!rs rget_ttlzTokenizer.get_ttl/sS ##%""$--++,EF Fww  --r)FF)rNr&)rrrrrjrkr$rzr|r~rrrr__next__rbrrrrrrrrrrrrrgrgsv8T!!F$1 ({/z$ H & &(   7  .rrg)riorrj dns.exceptionrPdns.namedns.ttl_compatrrrrrrr'r,r/r3r6r9r<rQ DNSExceptionrobjectrrgrrrrs$& 11     Dk     Ocmm00OaFaHc.c.r