mirror of
https://github.com/wader/fq.git
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233 lines
7.0 KiB
Plaintext
233 lines
7.0 KiB
Plaintext
# TODO: introspect and show doc, reflection somehow?
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def help:
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( builtins[]
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, "^C interrupt"
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, "^D exit REPL"
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) | println;
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# TODO: escape for safe key names
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# path ["a", 1, "b"] -> "a[1].b"
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def path_to_expr:
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if length == 0 then "."
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else
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map(if type == "number" then "[", ., "]" else ".", . end) | join("")
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end;
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# TODO: don't use eval? should support '.a.b[1]."c.c"' and escapes?
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def expr_to_path:
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( if type != "string" then error("require string argument") end
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| eval("null | path(\(.))")
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);
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def trim: capture("^\\s*(?<str>.*?)\\s*$"; "").str;
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# does +1 and [:1] as " "*0 is null
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def rpad($s; $w): . + ($s * ($w+1-length))[1:];
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# helper to build path query/generate functions for tree structures with
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# non-unique children, ex: mp4_path
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def tree_path(children; name; $v):
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def _lookup:
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# add implicit zeros to get first value
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# ["a", "b", 1] => ["a", 0, "b", 1]
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def _normalize_path:
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( . as $np
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| if $np | last | type == "string" then $np+[0] end
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# state is [path acc, possible pending zero index]
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| ( reduce .[] as $np ([[], []];
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if $np | type == "string" then
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[(.[0]+.[1]+[$np]), [0]]
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else
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[.[0]+[$np], []]
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end
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))
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)[0];
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( . as $c
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| $v
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| expr_to_path
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| _normalize_path
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| reduce .[] as $n ($c;
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if $n | type == "string" then
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children | map(select(name==$n))
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else
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.[$n]
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end
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)
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);
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def _path:
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[ . as $r
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| $v._path as $p
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| foreach range(($p | length)/2) as $i (null; null;
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( ($r | getpath($p[0:($i+1)*2]) | name) as $name
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| [($r | getpath($p[0:($i+1)*2-1]))[] | name][0:$p[($i*2)+1]+1] as $before
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| [ $name
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, ($before | map(select(. == $name)) | length)-1
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]
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)
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)
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| [ ".", .[0],
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(.[1] | if . == 0 then empty else "[", ., "]" end)
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]
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]
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| flatten
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| join("");
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if $v | type == "string" then _lookup
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else _path
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end;
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# [{a: 123, ...}, ...]
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# colmap maps something into [col, ...]
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# render maps [{column: 0, string: "coltext", maxwidth: 12}, ..] into a row
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def table(colmap; render):
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def _column_widths:
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[ . as $rs
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| range($rs[0] | length) as $i
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| [$rs[] | colmap | (.[$i] | length)]
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| max
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];
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if length == 0 then ""
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else
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( _column_widths as $cw
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| . as $rs
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| ( $rs[]
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| . as $r
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| [ range($r | length) as $i
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| ($r | colmap | {column: $i, string: .[$i], maxwidth: $cw[$i]})
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]
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| render
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)
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)
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end;
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# convert number to array of bytes
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def number_to_bytes($bits):
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def _number_to_bytes($d):
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if . > 0 then
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. % $d, (. div $d | _number_to_bytes($d))
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else
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empty
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end;
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if . == 0 then [0]
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else [_number_to_bytes(1 bsl $bits)] | reverse
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end;
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def number_to_bytes:
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number_to_bytes(8);
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def from_radix($base; $table):
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( split("")
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| reverse
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| map($table[.])
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| if . == null then error("invalid char \(.)") end
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# state: [power, ans]
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| reduce .[] as $c ([1,0];
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( (.[0] * $base) as $b
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| [$b, .[1] + (.[0] * $c)]
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)
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)
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| .[1]
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);
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def to_radix($base; $table):
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if . == 0 then "0"
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else
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( [ recurse(if . > 0 then . div $base else empty end) | . % $base]
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| reverse
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| .[1:]
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| if $base <= ($table | length) then
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map($table[.]) | join("")
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else
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error("base too large")
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end
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)
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end;
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def radix($base; $to_table; $from_table):
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if . | type == "number" then to_radix($base; $to_table)
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elif . | type == "string" then from_radix($base; $from_table)
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else error("needs to be number of string")
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end;
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def radix2: radix(2; "01"; {"0": 0, "1": 1});
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def radix8: radix(8; "01234567"; {"0": 0, "1": 1, "2": 2, "3": 3,"4": 4, "5": 5, "6": 6, "7": 7});
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def radix16:radix(16; "0123456789abcdef"; {
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"0": 0, "1": 1, "2": 2, "3": 3,"4": 4, "5": 5, "6": 6, "7": 7, "8": 8, "9": 9,
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"a": 10, "b": 11, "c": 12, "d": 13, "e": 14, "f": 15
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});
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def radix62: radix(62; "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; {
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"0": 0, "1": 1, "2": 2, "3": 3,"4": 4, "5": 5, "6": 6, "7": 7, "8": 8, "9": 9,
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"A": 10, "B": 11, "C": 12, "D": 13, "E": 14, "F": 15, "G": 16,
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"H": 17, "I": 18, "J": 19, "K": 20, "L": 21, "M": 22, "N": 23,
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"O": 24, "P": 25, "Q": 26, "R": 27, "S": 28, "T": 29, "U": 30,
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"V": 31, "W": 32, "X": 33, "Y": 34, "Z": 35,
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"a": 36, "b": 37, "c": 38, "d": 39, "e": 40, "f": 41, "g": 42,
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"h": 43, "i": 44, "j": 45, "k": 46, "l": 47, "m": 48, "n": 49,
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"o": 50, "p": 51, "q": 52, "r": 53, "s": 54, "t": 55, "u": 56,
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"v": 57, "w": 58, "x": 59, "y": 60, "z": 61
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});
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def radix62: radix(62; "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; {
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"A": 0, "B": 1, "C": 2, "D": 3, "E": 4, "F": 5, "G": 6,
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"H": 7, "I": 8, "J": 9, "K": 10, "L": 11, "M": 12, "N": 13,
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"O": 14, "P": 15, "Q": 16, "R": 17, "S": 18, "T": 19, "U": 20,
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"V": 21, "W": 22, "X": 23, "Y": 24, "Z": 25,
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"a": 26, "b": 27, "c": 28, "d": 29, "e": 30, "f": 31, "g": 32,
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"h": 33, "i": 34, "j": 35, "k": 36, "l": 37, "m": 38, "n": 39,
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"o": 40, "p": 41, "q": 42, "r": 43, "s": 44, "t": 45, "u": 46,
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"v": 47, "w": 48, "x": 49, "y": 50, "z": 51,
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"0": 52, "1": 53, "2": 54, "3": 55, "4": 56, "5": 57, "6": 58, "7": 59, "8": 60, "9": 61
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});
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def radix64: radix(64; "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; {
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"A": 0, "B": 1, "C": 2, "D": 3, "E": 4, "F": 5, "G": 6,
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"H": 7, "I": 8, "J": 9, "K": 10, "L": 11, "M": 12, "N": 13,
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"O": 14, "P": 15, "Q": 16, "R": 17, "S": 18, "T": 19, "U": 20,
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"V": 21, "W": 22, "X": 23, "Y": 24, "Z": 25,
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"a": 26, "b": 27, "c": 28, "d": 29, "e": 30, "f": 31, "g": 32,
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"h": 33, "i": 34, "j": 35, "k": 36, "l": 37, "m": 38, "n": 39,
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"o": 40, "p": 41, "q": 42, "r": 43, "s": 44, "t": 45, "u": 46,
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"v": 47, "w": 48, "x": 49, "y": 50, "z": 51,
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"0": 52, "1": 53, "2": 54, "3": 55, "4": 56, "5": 57, "6": 58, "7": 59, "8": 60, "9": 61,
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"+": 62, "/": 63
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});
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# like iprint
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def i:
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{
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bin: "0b\(radix2)",
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oct: "0o\(radix8)",
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dec: "\(.)",
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hex: "0x\(radix16)",
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str: (try ([.] | implode) catch null),
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};
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# produce a/b pairs for diffing values
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def diff($a; $b):
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( ( $a | type) as $at
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| ( $b | type) as $bt
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| if $at != $bt then {a: $a, b: $b}
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elif ($at == "array" or $at == "object") then
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( [ ((($a | keys) + ($b | keys)) | unique)[] as $k
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| {
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($k | tostring):
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( [($a | has($k)), ($b | has($k))]
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| if . == [true, true] then diff($a[$k]; $b[$k])
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elif . == [true, false] then {a: $a[$k]}
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elif . == [false, true] then {b: $b[$k]}
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else empty # TODO: can't happen? error?
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end
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)
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}
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]
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| add
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| if . == null then empty end
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)
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else
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if $a == $b then empty else {a: $a, b: $b} end
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end
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);
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def in_bits_range($p):
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select(scalars and ._start? and ._start <= $p and $p < ._stop);
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def in_bytes_range($p):
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select(scalars and ._start? and ._start/8 <= $p and $p < ._stop/8);
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