mirror of
https://github.com/fish-shell/fish-shell
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860 lines
25 KiB
Python
Executable file
860 lines
25 KiB
Python
Executable file
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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""" Deroff.py, ported to Python from the venerable deroff.c """
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import sys, re, string
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class Deroffer:
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g_specs_specletter = {
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# Output composed latin1 letters
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'-D': '\320',
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'Sd': '\360',
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'Tp': '\376',
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'TP': '\336',
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'AE': '\306',
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'ae': '\346',
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'OE': "OE",
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'oe': "oe",
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':a': '\344',
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':A': '\304',
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':e': '\353',
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':E': '\313',
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':i': '\357',
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':I': '\317',
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':o': '\366',
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':O': '\326',
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':u': '\374',
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':U': '\334',
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':y': '\377',
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'ss': '\337',
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'\'A': '\301',
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'\'E': '\311',
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'\'I': '\315',
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'\'O': '\323',
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'\'U': '\332',
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'\'Y': '\335',
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'\'a': '\341',
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'\'e': '\351',
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'\'i': '\355',
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'\'o': '\363',
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'\'u': '\372',
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'\'y': '\375',
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'^A': '\302',
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'^E': '\312',
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'^I': '\316',
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'^O': '\324',
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'^U': '\333',
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'^a': '\342',
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'^e': '\352',
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'^i': '\356',
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'^o': '\364',
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'^u': '\373',
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'`A': '\300',
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'`E': '\310',
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'`I': '\314',
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'`O': '\322',
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'`U': '\331',
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'`a': '\340',
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'`e': '\350',
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'`i': '\354',
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'`o': '\362',
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'`u': '\371',
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'~A': '\303',
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'~N': '\321',
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'~O': '\325',
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'~a': '\343',
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'~n': '\361',
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'~o': '\365',
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',C': '\307',
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',c': '\347',
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'/l': "/l",
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'/L': "/L",
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'/o': '\370',
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'/O': '\330',
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'oA': '\305',
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'oa': '\345',
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# Ligatures
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'fi': 'fi',
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'ff': 'ff',
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'fl': 'fl',
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'Fi': 'ffi',
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'Ff': 'fff',
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'Fl': 'ffl'
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}
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g_specs = {
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'mi': '-',
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'en': '-',
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'hy': '-',
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'em': "--",
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'lq': "\"", # PCA: This used to be left and right smart quotes, but they look dumb
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'rq': "\"", # So just use ordinary double quotes
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'Bq': ",,",
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'oq': '`',
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'cq': '\'',
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'aq': '\'',
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'dq': '"',
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'or': '|',
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'at': '@',
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'sh': '#',
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'Eu': '\244',
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'eu': '\244',
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'Do': '$',
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'ct': '\242',
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'Fo': '\253',
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'Fc': '\273',
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'fo': '<',
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'fc': '>',
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'r!': '\241',
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'r?': '\277',
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'Of': '\252',
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'Om': '\272',
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'pc': '\267',
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'S1': '\271',
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'S2': '\262',
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'S3': '\263',
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'<-': "<-",
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'->': "->",
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'<>': "<->",
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'ua': '^',
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'da': 'v',
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'lA': "<=",
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'rA': "=>",
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'hA': "<=>",
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'uA': "^^",
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'dA': "vv",
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'ba': '|',
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'bb': '|',
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'br': '|',
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'bv': '|',
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'ru': '_',
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'ul': '_',
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'ci': 'O',
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'bu': 'o',
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'co': '\251',
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'rg': '\256',
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'tm': "(TM)",
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'dd': "||",
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'dg': '|',
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'ps': '\266',
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'sc': '\247',
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'de': '\260',
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'%0': "0/00",
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'14': '\274',
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'12': '\275',
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'34': '\276',
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'f/': '/',
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'sl': '/',
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'rs': '\\',
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'sq': "[]",
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'fm': '\'',
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'ha': '^',
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'ti': '~',
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'lB': '[',
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'rB': ']',
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'lC': '{',
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'rC': '}',
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'la': '<',
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'ra': '>',
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'lh': "<=",
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'rh': "=>",
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'tf': "therefore",
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'~~': "~~",
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'~=': "~=",
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'!=': "!=",
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'**': '*',
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'+-': '\261',
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'<=': "<=",
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'==': "==",
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'=~': "=~",
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'>=': ">=",
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'AN': "\\/",
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'OR': "/\\",
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'no': '\254',
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'te': "there exists",
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'fa': "for all",
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'Ah': "aleph",
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'Im': "imaginary",
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'Re': "real",
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'if': "infinity",
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'md': "\267",
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'mo': "member of",
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'mu': '\327',
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'nm': "not member of",
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'pl': '+',
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'eq': '=',
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'pt': "oc",
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'pp': "perpendicular",
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'sb': "(=",
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'sp': "=)",
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'ib': "(-",
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'ip': "-)",
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'ap': '~',
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'is': 'I',
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'sr': "root",
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'pd': 'd',
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'c*': "(x)",
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'c+': "(+)",
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'ca': "cap",
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'cu': 'U',
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'di': '\367',
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'gr': 'V',
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'es': "{}",
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'CR': "_|",
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'st': "such that",
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'/_': "/_",
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'lz': "<>",
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'an': '-',
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# Output Greek
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'*A': "Alpha",
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'*B': "Beta",
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'*C': "Xi",
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'*D': "Delta",
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'*E': "Epsilon",
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'*F': "Phi",
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'*G': "Gamma",
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'*H': "Theta",
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'*I': "Iota",
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'*K': "Kappa",
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'*L': "Lambda",
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'*M': "Mu",
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'*N': "Nu",
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'*O': "Omicron",
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'*P': "Pi",
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'*Q': "Psi",
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'*R': "Rho",
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'*S': "Sigma",
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'*T': "Tau",
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'*U': "Upsilon",
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'*W': "Omega",
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'*X': "Chi",
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'*Y': "Eta",
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'*Z': "Zeta",
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'*a': "alpha",
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'*b': "beta",
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'*c': "xi",
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'*d': "delta",
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'*e': "epsilon",
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'*f': "phi",
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'+f': "phi",
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'*g': "gamma",
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'*h': "theta",
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'+h': "theta",
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'*i': "iota",
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'*k': "kappa",
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'*l': "lambda",
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'*m': "\265",
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'*n': "nu",
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'*o': "omicron",
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'*p': "pi",
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'+p': "omega",
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'*q': "psi",
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'*r': "rho",
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'*s': "sigma",
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'*t': "tau",
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'*u': "upsilon",
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'*w': "omega",
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'*x': "chi",
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'*y': "eta",
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'*z': "zeta",
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'ts': "sigma",
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}
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g_re_word = re.compile(r'[a-zA-Z_]+') # equivalent to the word() method
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g_re_number = re.compile(r'[+-]?\d+') # equivalent to the number() method
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g_re_esc_char = re.compile(r"""([a-zA-Z_]) | # Word
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([+-]?\d) | # Number
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\\ # Backslash (for escape seq)
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""", re.VERBOSE)
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g_re_not_backslash_or_whitespace = re.compile(r'[^ \t\n\r\f\v\\]+') # Match a sequence of not backslash or whitespace
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g_re_newline_collapse = re.compile(r'\n{3,}')
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g_re_font = re.compile(r"""\\f( # Starts with backslash f
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(\(\S{2}) | # Open paren, then two printable chars
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(\[\S*?\]) | # Open bracket, zero or more printable characters, then close bracket
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\S) # Any printable character
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""", re.VERBOSE)
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def __init__(self):
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self.reg_table = {}
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self.tr_from = ''
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self.tr_to = ''
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self.tr = ''
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self.nls = 2
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self.specletter = False
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self.refer = False
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self.macro = 0
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self.nobody = False
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self.inlist = False
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self.inheader = False
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self.pic = False
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self.tbl = False
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self.tblstate = 0
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self.tblTab = ''
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self.eqn = False
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self.skipheaders = False
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self.skiplists = False
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self.ignore_sonx = False
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self.output = []
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self.OPTIONS = 0
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self.FORMAT = 1
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self.DATA = 2
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# words is uninteresting and should be treated as false
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def flush_output(self, where):
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if where:
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where.write(self.get_output())
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self.output[:] = []
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def get_output(self):
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res = ''.join(self.output)
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clean_res = Deroffer.g_re_newline_collapse.sub('\n', res)
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return clean_res
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def putchar(self, c):
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self.output.append(c)
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return c
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# This gets swapped in in place of condputs the first time tr gets modified
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def condputs_tr(self, str):
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special = self.pic or self.eqn or self.refer or self.macro or (self.skiplists and self.inlist) or (self.skipheaders and self.inheader)
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if not special:
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self.output.append(str.translate(self.tr))
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def condputs(self, str):
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special = self.pic or self.eqn or self.refer or self.macro or (self.skiplists and self.inlist) or (self.skipheaders and self.inheader)
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if not special:
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self.output.append(str)
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def str_at(self, idx):
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return self.s[idx:idx+1]
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def skip_char(self, amt=1):
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self.s = self.s[amt:]
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def skip_leading_whitespace(self):
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self.s = self.s.lstrip()
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def is_white(self, idx):
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# Note this returns false for empty strings (idx >= len(self.s))
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return self.s[idx:idx+1].isspace()
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def prefix_at(self, offset, other_str):
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return self.s[offset:].startswith(other_str)
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def str_eq(offset, other, len):
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return self.s[offset:offset+len] == other[:len]
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def prch(self, idx):
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# Note that this return False for the empty string (idx >= len(self.s))
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ch = self.s[idx:idx+1]
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return ch not in ' \t\n'
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def font(self):
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match = Deroffer.g_re_font.match(self.s)
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if not match: return False
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self.skip_char(match.end())
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return True
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def font2(self):
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if self.s.startswith('\\f'):
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c = self.str_at(2)
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if c == '(' and self.prch(3) and self.prch(4):
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self.skip_char(5)
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return True
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elif c == '[':
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self.skip_char(2)
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while self.prch(0) and self.str_at(0) != ']': self.skip_char()
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if self.str_at(0) == ']': self.skip_char()
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elif self.prch(2):
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self.skip_char(3)
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return True
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return False
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def comment(self):
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if self.str_at(0) == '\\' and self.str_at(1) == '"':
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while self.str_at(0) and self.str_at(0) != '\n': self.skip_char()
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return True
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return False
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def numreq(self):
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if self.str_at(0) == '\\' and self.str_at(1) in 'hvwud' and self.str_at(2) == '\'':
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self.macro += 1
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self.skip_char(3)
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while self.str_at(0) != '\'' and self.esc_char():
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pass # Weird
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if self.str_at(0) == '\'':
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self.skip_char()
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self.macro -= 1
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return True
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return False
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def var(self):
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reg = ''
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if self.s.startswith('\\n'):
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if self.s[3:5].startswith('dy'):
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self.skip_char(5)
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return True
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elif self.str_at(2) == '(' and self.prch(3) and self.prch(4):
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self.skip_char(5)
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return True
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elif self.str_at(2) == '[' and self.prch(3):
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self.skip_char(3)
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while self.str_at(0) and self.str_at(0) != ']':
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self.skip_char()
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return True
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elif self.prch(2):
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self.skip_char(3)
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return True
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elif self.s.startswith('\\*'):
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if self.str_at(2) == '(' and self.prch(3) and self.prch(4):
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reg = self.s[3:5]
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self.skip_char(5)
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elif self.str_at(2) == '[' and self.prch(3):
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self.skip_char(3)
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while self.str_at(0) and self.str_at(0) != ']':
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reg = reg + self.str_at(0)
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self.skip_char()
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if self.s.startswith(']'):
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self.skip_char()
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else:
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return False
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elif self.prch(2):
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reg = self.str_at(2)
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self.skip_char(3)
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else:
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return False
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if reg in self.reg_table:
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old_s = self.s
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self.s = self.reg_table[reg]
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self.text_arg()
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return True
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return False
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def size(self):
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if self.str_at(0) == '\\' and self.str_at(1) == 's' and (self.digit(2) or (self.str_at(2) in '-+' and self.digit(3))):
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self.skip_char(3)
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while self.digit(0): self.skip_char()
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return True
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return False
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def spec(self):
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self.specletter = False
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if self.s.startswith('\\(') and self.prch(2) and self.prch(3):
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key = self.s[2:4]
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if key in Deroffer.g_specs_specletter:
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self.condputs(Deroffer.g_specs_specletter[key])
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self.specletter = True
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elif key in Deroffer.g_specs:
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self.condputs(Deroffer.g_specs[key])
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self.skip_char(4)
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return True
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elif self.s.startswith('\\%'):
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self.specletter = True
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self.skip_char(2)
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return True
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else:
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return False
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def esc(self):
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if self.s.startswith('\\'):
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c = self.str_at(1)
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if not c: return False
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if c in 'eE':
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self.condputs('\\')
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elif c in 't':
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self.condputs('\t')
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elif c in '0~':
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self.condputs(' ')
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elif c in '|^&:':
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pass
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else:
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self.condputs(c)
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self.skip_char(2)
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return True
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return False
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def word(self):
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got_something = False
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while True:
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match = Deroffer.g_re_word.match(self.s)
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if not match: break
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got_something = True
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self.condputs(match.group(0))
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self.skip_char(match.end(0))
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# Consume all specials
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while self.spec():
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if not self.specletter: break
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return got_something
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def text(self):
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while True:
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idx = self.s.find('\\')
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if idx == -1:
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self.condputs(self.s)
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self.s = ''
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break
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else:
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self.condputs(self.s[:idx])
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self.skip_char(idx)
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if not self.esc_char():
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self.condputs(self.str_at(0))
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self.skip_char()
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return True
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def letter(self, idx):
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ch = self.str_at(idx)
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return ch.isalpha() or ch == '_' # underscore is used in C identifiers
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def digit(self, idx):
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ch = self.str_at(idx)
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return ch.isdigit()
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def number(self):
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match = Deroffer.g_re_number.match(self.s)
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if not match:
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return False
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else:
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self.condputs(match.group(0))
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self.skip_char(match.end())
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return True
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||
def esc_char2(self):
|
||
if self.s.startswith('\\'):
|
||
if self.comment() or self.font() or self.size() or self.numreq() or self.var() or self.spec() or self.esc():
|
||
return True
|
||
return self.word() or self.number()
|
||
|
||
def esc_char(self):
|
||
if self.s.startswith('\\'):
|
||
c = self.str_at(1)
|
||
if c == '"':
|
||
if self.comment(): return True
|
||
elif c == 'f':
|
||
if self.font(): return True
|
||
elif c == 's':
|
||
if self.size(): return True
|
||
elif c in 'hvwud':
|
||
if self.numreq(): return True
|
||
elif c in 'n*':
|
||
if self.var(): return True
|
||
elif c == '(':
|
||
if self.spec(): return True
|
||
else:
|
||
if self.esc(): return True
|
||
return self.word() or self.number()
|
||
|
||
def quoted_arg(self):
|
||
if self.str_at(0) == '"':
|
||
self.skip_char()
|
||
while self.s and self.str_at(0) != '"':
|
||
if not self.esc_char():
|
||
if self.s:
|
||
self.condputs(self.str_at(0))
|
||
self.skip_char()
|
||
return True
|
||
else:
|
||
return False
|
||
|
||
def text_arg(self):
|
||
# PCA: The deroff.c textArg() disallowed quotes at the start of an argument
|
||
# I'm not sure if this was a bug or not
|
||
got_something = False
|
||
while True:
|
||
match = Deroffer.g_re_not_backslash_or_whitespace.match(self.s)
|
||
if match:
|
||
# Output the characters in the match
|
||
self.condputs(match.group(0))
|
||
self.skip_char(match.end(0))
|
||
got_something = True
|
||
|
||
# Next is either an escape, or whitespace, or the end
|
||
# If it's the whitespace or the end, we're done
|
||
if not self.s or self.is_white(0):
|
||
return got_something
|
||
|
||
# Try an escape
|
||
if not self.esc_char():
|
||
# Some busted escape? Just output it
|
||
self.condputs(self.str_at(0))
|
||
self.skip_char()
|
||
got_something = True
|
||
|
||
|
||
|
||
def text_arg2(self):
|
||
if not self.esc_char():
|
||
if self.s and not self.is_white(0):
|
||
self.condputs(self.str_at(0))
|
||
self.skip_char()
|
||
else:
|
||
return False
|
||
while True:
|
||
if not self.esc_char():
|
||
if self.s and not self.is_white(0):
|
||
self.condputs(self.str_at(0))
|
||
self.skip_char()
|
||
else:
|
||
return True
|
||
|
||
def request_or_macro(self):
|
||
self.skip_char()
|
||
s0 = self.str_at(0)
|
||
if s0 == '\\':
|
||
if self.str_at(1) == '"':
|
||
self.condputs('\n')
|
||
return True
|
||
else:
|
||
pass
|
||
elif s0 == '[':
|
||
self.refer = True
|
||
self.condputs('\n')
|
||
return True
|
||
elif s0 == ']':
|
||
self.refer = False
|
||
self.skip_char()
|
||
return self.text()
|
||
elif s0 == '.':
|
||
self.macro = False
|
||
self.condputs('\n')
|
||
return True
|
||
|
||
self.nobody = False
|
||
s0s1 = self.s[0:2]
|
||
if s0s1 == 'SH':
|
||
for header_str in [' SYNOPSIS', ' "SYNOPSIS', ' ‹BERSICHT', ' "‹BERSICHT']:
|
||
if self.s[2:].startswith(header_str):
|
||
self.inheader = True
|
||
break
|
||
else:
|
||
# Did not find a header string
|
||
self.inheader = False
|
||
self.nobody = True
|
||
elif s0s1 in ['SS', 'IP', 'H ']:
|
||
self.nobody = True
|
||
elif s0s1 in ['I ', 'IR', 'IB', 'B ', 'BR', 'BI', 'R ', 'RB', 'RI', 'AB']:
|
||
pass
|
||
elif s0s1 in ['] ']:
|
||
self.refer = False
|
||
elif s0s1 in ['PS']:
|
||
if self.is_white(2): self.pic = True
|
||
self.condputs('\n')
|
||
return True
|
||
elif s0s1 in ['PE']:
|
||
if self.is_white(2): self.pic = False
|
||
self.condputs('\n')
|
||
return True
|
||
elif s0s1 in ['TS']:
|
||
if self.is_white(2): self.tbl, self.tblstate = True, self.OPTIONS
|
||
self.condputs('\n')
|
||
return True
|
||
elif s0s1 in ['T&']:
|
||
if self.is_white(2): self.tbl, self.tblstate = True, self.FORMAT
|
||
self.condputs('\n')
|
||
return True
|
||
elif s0s1 in ['TE']:
|
||
if self.is_white(2): self.tbl = False
|
||
self.condputs('\n')
|
||
return True
|
||
elif s0s1 in ['EQ']:
|
||
if self.is_white(2): self.eqn = True
|
||
self.condputs('\n')
|
||
return True
|
||
elif s0s1 in ['EN']:
|
||
if self.is_white(2): self.eqn = False
|
||
self.condputs('\n')
|
||
return True
|
||
elif s0s1 in ['R1']:
|
||
if self.is_white(2): self.refer2 = True
|
||
self.condputs('\n')
|
||
return True
|
||
elif s0s1 in ['R2']:
|
||
if self.is_white(2): self.refer2 = False
|
||
self.condputs('\n')
|
||
return True
|
||
elif s0s1 in ['de']:
|
||
macro=True
|
||
self.condputs('\n')
|
||
return True
|
||
elif s0s1 in ['BL', 'VL', 'AL', 'LB', 'RL', 'ML', 'DL']:
|
||
if self.is_white(2): self.inlist = True
|
||
self.condputs('\n')
|
||
return True
|
||
elif s0s1 in ['BV']:
|
||
if self.str_at(2) == 'L' and self.white(self.str_at(3)): self.inlist = True
|
||
self.condputs('\n')
|
||
return True
|
||
elif s0s1 in ['LE']:
|
||
if self.is_white(2): self.inlist = False
|
||
self.condputs('\n')
|
||
return True
|
||
elif s0s1 in ['LP', 'PP', 'P\n']:
|
||
self.condputs('\n')
|
||
return True
|
||
elif s0s1 in ['ds']:
|
||
self.skip_char(2)
|
||
self.skip_leading_whitespace()
|
||
if self.str_at(0):
|
||
# Split at whitespace
|
||
comps = self.s.split(None, 2)
|
||
if len(comps) is 2:
|
||
name, value = comps
|
||
value = value.rstrip()
|
||
self.reg_table[name] = value
|
||
self.condputs('\n')
|
||
return True
|
||
elif s0s1 in ['so', 'nx']:
|
||
# We always ignore include directives
|
||
# deroff.c for some reason allowed this to fall through to the 'tr' case
|
||
# I think that was just a bug so I won't replicate it
|
||
return True
|
||
elif s0s1 in ['tr']:
|
||
self.skip_char(2)
|
||
self.skip_leading_whitespace()
|
||
while self.s and self.str_at(0) != '\n':
|
||
c = self.str_at(0)
|
||
ns = self.str_at(1)
|
||
self.skip_char(2)
|
||
if not ns or ns == '\n': ns = ' '
|
||
self.tr_from += c
|
||
self.tr_to += ns
|
||
|
||
# Update our table, then swap in the slower tr-savvy condputs
|
||
self.tr = string.maketrans(self.tr_from, self.tr_to)
|
||
self.condputs = self.condputs_tr
|
||
|
||
return True
|
||
elif s0s1 in ['sp']:
|
||
self.condputs('\n')
|
||
return True
|
||
else:
|
||
self.condputs('\n')
|
||
return True
|
||
|
||
if self.skipheaders and self.nobody: return True
|
||
|
||
self.skip_leading_whitespace()
|
||
while self.s and not self.is_white(0): self.skip_char()
|
||
self.skip_leading_whitespace()
|
||
while True:
|
||
if not self.quoted_arg() and not self.text_arg():
|
||
if self.s:
|
||
self.condputs(self.str_at(0))
|
||
self.skip_char()
|
||
else:
|
||
return True
|
||
|
||
|
||
def do_tbl(self):
|
||
if self.tblstate == self.OPTIONS:
|
||
while self.s and self.str_at(0) != ';' and self.str_at(0) != '\n':
|
||
self.skip_leading_whitespace()
|
||
if not self.str_at(0).isalpha():
|
||
# deroff.c has a bug where it can loop forever here...we try to work around it
|
||
self.skip_char()
|
||
else: # Parse option
|
||
|
||
option = self.s
|
||
arg = ''
|
||
|
||
idx = 0
|
||
while option[idx:idx+1].isalpha():
|
||
idx += 1
|
||
|
||
if option[idx:idx+1] == '(':
|
||
option = option[:idx]
|
||
self.s = self.s[idx+1:]
|
||
arg = self.s
|
||
else:
|
||
self.s = ''
|
||
|
||
if arg:
|
||
idx = arg.find(')')
|
||
if idx != -1:
|
||
arg = arg[:idx]
|
||
self.s = self.s[idx+1:]
|
||
else:
|
||
#self.skip_char()
|
||
pass
|
||
|
||
if option.lower() == 'tab':
|
||
self.tblTab = arg[0:1]
|
||
|
||
self.tblstate = self.FORMAT
|
||
self.condputs('\n')
|
||
|
||
elif self.tblstate == self.FORMAT:
|
||
while self.s and self.str_at(0) != '.' and self.str_at(0) != '\n':
|
||
self.skip_leading_whitespace()
|
||
if self.str_at(0): self.skip_char()
|
||
|
||
if self.str_at(0) == '.': self.tblstate = self.DATA
|
||
self.condputs('\n')
|
||
elif self.tblstate == self.DATA:
|
||
if self.tblTab:
|
||
self.s = self.s.replace(self.tblTab, '\t')
|
||
self.text()
|
||
return True
|
||
|
||
def do_line(self):
|
||
ch = self.str_at(0)
|
||
if ch == '.' or ch == '\'':
|
||
if not self.request_or_macro(): return False
|
||
elif self.tbl:
|
||
self.do_tbl()
|
||
elif '\\' not in self.s:
|
||
# Fast check for common case of simple string
|
||
self.condputs(self.s)
|
||
else:
|
||
self.text()
|
||
return True
|
||
|
||
def deroff(self, str):
|
||
lines = str.split('\n')
|
||
for line in lines:
|
||
self.s = line + '\n'
|
||
if not self.do_line():
|
||
break
|
||
#self.putchar('\n')
|
||
|
||
def deroff_files(files):
|
||
for arg in files:
|
||
print >> sys.stderr, arg
|
||
if arg.endswith('.gz'):
|
||
f = gzip.open(arg, 'r')
|
||
else:
|
||
f = open(arg, 'r')
|
||
str = f.read()
|
||
d = Deroffer()
|
||
d.deroff(str)
|
||
d.flush_output(sys.stdout)
|
||
f.close()
|
||
|
||
|
||
|
||
if __name__ == "__main__":
|
||
import gzip
|
||
paths = sys.argv[1:]
|
||
if False:
|
||
deroff_files(paths)
|
||
else:
|
||
import cProfile, pstats
|
||
cProfile.run('deroff_files(paths)', 'fooprof')
|
||
p = pstats.Stats('fooprof')
|
||
p.sort_stats('time').print_stats(100)
|
||
#p.sort_stats('calls').print_callers(.5, 'str_at')
|