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/*
* PEG.js grammar for iCal (http://tools.ietf.org/html/rfc5545).
* Does not understand folds. They must be taken care of before
* using the parser generated from this grammar.
*/
start
= ContentLineList
/ "" { return []; }
ContentLineList
= head:ContentLine tail:(LineEnd ContentLine)* {
var result = [head], i = 0;
for (; i < tail.length; ++i) result.push(tail[i][1]);
return result;
}
ContentLine
= name:Name params:(";" Param)* ":" value:Value {
var par = [], i = 0;
for (i = 0; i < params.length; ++i) par.push(params[i][1]);
return {name:name, params:par, value:value};
}
Name
= XName
/ IANAToken
IANAToken
= token:([A-Za-z0-9-]+) { return token.join(""); }
XName
= x:"X-" vendor:(VendorID "-")? tok:[A-Za-z0-9-]+ { return x + vendor + tok.join(""); }
VendorID
= [A-Za-z0-9][A-Za-z0-9][A-Za-z0-9]
Param
= name:ParamName "=" params:ParamValueList {
return {name:name, values:params};
}
ParamValueList
= head:ParamValue tail:("," ParamValue)* {
var result = [head];
var i = 0;
for (i = 0; i < tail.length; ++i) result.push(tail[i][1]);
return result;
}
ParamName "ParamName"
= XName
/ IANAToken
ParamValue "ParamValue"
= QuotedString / ParamText
ParamText "ParamText"
= chars:SAFE_CHAR* { return chars.join(""); }
Value "Value"
= chars:VALUE_CHAR* { return chars.join(""); }
QuotedString "QuotedString"
= '"' chars:QSAFE_CHAR* '"' { return '"' + chars.join("") + '"'; }
QSAFE_CHAR "QSAFE_CHAR"
= [ \t\x21\x23-\x7E]
/ NON_US_ASCII
SAFE_CHAR "SAFE_CHAR"
= [ \t\x21\x23-\x2B\x2D-\x39\x3C-\x7E]
/ NON_US_ASCII
VALUE_CHAR "VALUE_CHAR"
= [ \t\x21-\x7E]
/ NON_US_ASCII
NON_US_ASCII
= UTF8_2
/ UTF8_3
/ UTF8_4
LineEnd "LineEnd"
= CR LF
/ LF
CR "CR"
= "\r"
LF "LF"
= "\n"
UTF8_Octets
= UTF8_Char*
UTF8_Char
= UTF8_1
/ UTF8_2
/ UTF8_3
/ UTF8_4
UTF8_1
= [\x00-\x7F]
UTF8_2
= [\xC2-\xDF] UTF8_Tail
UTF8_3
= "\xE0" [\xA0-\xBF] UTF8_Tail
/ [\xE1-\xEC] UTF8_Tail2
/ "\xED" [\x80-\x9F] UTF8_Tail
/ [\xEE-\xEF] UTF8_Tail2
UTF8_4
= "\xF0" [\x90-\xBF] UTF8_Tail2
/ [\xF1-\xF3] UTF8_Tail2 UTF8_Tail
/ "\xF4" [\x80-\x8F] UTF8_Tail2
UTF8_Tail
= [\x80-\xBF]
UTF8_Tail2
= UTF8_Tail UTF8_Tail
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