604 lines
14 KiB
C
604 lines
14 KiB
C
/*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1980, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#if 0
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#ifndef lint
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static char sccsid[] = "@(#)checknr.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* checknr: check an nroff/troff input file for matching macro calls.
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* we also attempt to match size and font changes, but only the embedded
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* kind. These must end in \s0 and \fP resp. Maybe more sophistication
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* later but for now think of these restrictions as contributions to
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* structured typesetting.
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*/
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#define MAXSTK 100 /* Stack size */
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#define MAXBR 100 /* Max number of bracket pairs known */
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#define MAXCMDS 500 /* Max number of commands known */
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void addcmd(char *);
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void addmac(const char *);
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int binsrch(const char *);
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void checkknown(const char *);
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void chkcmd(const char *, const char *);
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void complain(int);
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int eq(const char *, const char *);
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void nomatch(const char *);
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void pe(int);
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void process(FILE *);
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void prop(int);
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static void usage(void);
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/*
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* The stack on which we remember what we've seen so far.
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*/
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struct stkstr {
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int opno; /* number of opening bracket */
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int pl; /* '+', '-', ' ' for \s, 1 for \f, 0 for .ft */
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int parm; /* parm to size, font, etc */
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int lno; /* line number */
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} stk[MAXSTK];
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int stktop;
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/*
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* The kinds of opening and closing brackets.
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*/
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struct brstr {
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const char *opbr;
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const char *clbr;
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} br[MAXBR] = {
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/* A few bare bones troff commands */
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#define SZ 0
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{"sz", "sz"}, /* also \s */
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#define FT 1
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{"ft", "ft"}, /* also \f */
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/* the -mm package */
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{"AL", "LE"},
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{"AS", "AE"},
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{"BL", "LE"},
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{"BS", "BE"},
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{"DF", "DE"},
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{"DL", "LE"},
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{"DS", "DE"},
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{"FS", "FE"},
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{"ML", "LE"},
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{"NS", "NE"},
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{"RL", "LE"},
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{"VL", "LE"},
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/* the -ms package */
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{"AB", "AE"},
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{"BD", "DE"},
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{"CD", "DE"},
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{"DS", "DE"},
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{"FS", "FE"},
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{"ID", "DE"},
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{"KF", "KE"},
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{"KS", "KE"},
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{"LD", "DE"},
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{"LG", "NL"},
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{"QS", "QE"},
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{"RS", "RE"},
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{"SM", "NL"},
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{"XA", "XE"},
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{"XS", "XE"},
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/* The -me package */
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{"(b", ")b"},
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{"(c", ")c"},
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{"(d", ")d"},
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{"(f", ")f"},
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{"(l", ")l"},
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{"(q", ")q"},
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{"(x", ")x"},
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{"(z", ")z"},
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/* Things needed by preprocessors */
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{"EQ", "EN"},
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{"TS", "TE"},
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/* Refer */
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{"[", "]"},
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{0, 0}
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};
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/*
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* All commands known to nroff, plus macro packages.
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* Used so we can complain about unrecognized commands.
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*/
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const char *knowncmds[MAXCMDS] = {
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"$c", "$f", "$h", "$p", "$s", "(b", "(c", "(d", "(f", "(l", "(q", "(t",
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"(x", "(z", ")b", ")c", ")d", ")f", ")l", ")q", ")t", ")x", ")z", "++",
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"+c", "1C", "1c", "2C", "2c", "@(", "@)", "@C", "@D", "@F", "@I", "@M",
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"@c", "@e", "@f", "@h", "@m", "@n", "@o", "@p", "@r", "@t", "@z", "AB",
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"AE", "AF", "AI", "AL", "AM", "AS", "AT", "AU", "AX", "B", "B1", "B2",
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"BD", "BE", "BG", "BL", "BS", "BT", "BX", "C1", "C2", "CD", "CM", "CT",
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"D", "DA", "DE", "DF", "DL", "DS", "DT", "EC", "EF", "EG", "EH", "EM",
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"EN", "EQ", "EX", "FA", "FD", "FE", "FG", "FJ", "FK", "FL", "FN", "FO",
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"FQ", "FS", "FV", "FX", "H", "HC", "HD", "HM", "HO", "HU", "I", "ID",
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"IE", "IH", "IM", "IP", "IX", "IZ", "KD", "KE", "KF", "KQ", "KS", "LB",
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"LC", "LD", "LE", "LG", "LI", "LP", "MC", "ME", "MF", "MH", "ML", "MR",
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"MT", "ND", "NE", "NH", "NL", "NP", "NS", "OF", "OH", "OK", "OP", "P",
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"P1", "PF", "PH", "PP", "PT", "PX", "PY", "QE", "QP", "QS", "R", "RA",
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"RC", "RE", "RL", "RP", "RQ", "RS", "RT", "S", "S0", "S2", "S3", "SA",
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"SG", "SH", "SK", "SM", "SP", "SY", "T&", "TA", "TB", "TC", "TD", "TE",
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"TH", "TL", "TM", "TP", "TQ", "TR", "TS", "TX", "UL", "US", "UX", "VL",
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"WC", "WH", "XA", "XD", "XE", "XF", "XK", "XP", "XS", "[", "[-", "[0",
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"[1", "[2", "[3", "[4", "[5", "[<", "[>", "[]", "]", "]-", "]<", "]>",
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"][", "ab", "ac", "ad", "af", "am", "ar", "as", "b", "ba", "bc", "bd",
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"bi", "bl", "bp", "br", "bx", "c.", "c2", "cc", "ce", "cf", "ch", "cs",
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"ct", "cu", "da", "de", "di", "dl", "dn", "ds", "dt", "dw", "dy", "ec",
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"ef", "eh", "el", "em", "eo", "ep", "ev", "ex", "fc", "fi", "fl", "fo",
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"fp", "ft", "fz", "hc", "he", "hl", "hp", "ht", "hw", "hx", "hy", "i",
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"ie", "if", "ig", "in", "ip", "it", "ix", "lc", "lg", "li", "ll", "ln",
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"lo", "lp", "ls", "lt", "m1", "m2", "m3", "m4", "mc", "mk", "mo", "n1",
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"n2", "na", "ne", "nf", "nh", "nl", "nm", "nn", "np", "nr", "ns", "nx",
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"of", "oh", "os", "pa", "pc", "pi", "pl", "pm", "pn", "po", "pp", "ps",
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"q", "r", "rb", "rd", "re", "rm", "rn", "ro", "rr", "rs", "rt", "sb",
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"sc", "sh", "sk", "so", "sp", "ss", "st", "sv", "sz", "ta", "tc", "th",
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"ti", "tl", "tm", "tp", "tr", "u", "uf", "uh", "ul", "vs", "wh", "xp",
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"yr", 0
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};
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int lineno; /* current line number in input file */
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const char *cfilename; /* name of current file */
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int nfiles; /* number of files to process */
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int fflag; /* -f: ignore \f */
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int sflag; /* -s: ignore \s */
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int ncmds; /* size of knowncmds */
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int slot; /* slot in knowncmds found by binsrch */
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int
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main(int argc, char **argv)
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{
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FILE *f;
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int i;
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char *cp;
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char b1[4];
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/* Figure out how many known commands there are */
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while (knowncmds[ncmds])
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ncmds++;
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while (argc > 1 && argv[1][0] == '-') {
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switch(argv[1][1]) {
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/* -a: add pairs of macros */
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case 'a':
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i = strlen(argv[1]) - 2;
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if (i % 6 != 0)
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usage();
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/* look for empty macro slots */
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for (i=0; br[i].opbr; i++)
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;
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for (cp=argv[1]+3; cp[-1]; cp += 6) {
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br[i].opbr = strncpy(malloc(3), cp, 2);
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br[i].clbr = strncpy(malloc(3), cp+3, 2);
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addmac(br[i].opbr); /* knows pairs are also known cmds */
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addmac(br[i].clbr);
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i++;
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}
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break;
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/* -c: add known commands */
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case 'c':
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i = strlen(argv[1]) - 2;
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if (i % 3 != 0)
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usage();
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for (cp=argv[1]+3; cp[-1]; cp += 3) {
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if (cp[2] && cp[2] != '.')
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usage();
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strncpy(b1, cp, 2);
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b1[2] = '\0';
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addmac(b1);
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}
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break;
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/* -f: ignore font changes */
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case 'f':
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fflag = 1;
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break;
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/* -s: ignore size changes */
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case 's':
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sflag = 1;
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break;
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default:
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usage();
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}
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argc--; argv++;
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}
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nfiles = argc - 1;
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if (nfiles > 0) {
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for (i=1; i<argc; i++) {
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cfilename = argv[i];
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f = fopen(cfilename, "r");
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if (f == NULL)
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warn("%s", cfilename);
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else {
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process(f);
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fclose(f);
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}
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}
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} else {
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cfilename = "stdin";
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process(stdin);
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}
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exit(0);
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}
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static void
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usage(void)
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{
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fprintf(stderr,
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"usage: checknr [-a.xx.yy.xx.yy...] [-c.xx.xx.xx...] [-s] [-f] file\n");
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exit(1);
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}
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void
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process(FILE *f)
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{
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int i, n;
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char mac[5]; /* The current macro or nroff command */
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int pl;
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static char line[256]; /* the current line */
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stktop = -1;
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for (lineno = 1; fgets(line, sizeof line, f); lineno++) {
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if (line[0] == '.') {
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/*
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* find and isolate the macro/command name.
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*/
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strncpy(mac, line+1, 4);
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if (isspace(mac[0])) {
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pe(lineno);
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printf("Empty command\n");
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} else if (isspace(mac[1])) {
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mac[1] = 0;
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} else if (isspace(mac[2])) {
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mac[2] = 0;
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} else if (mac[0] != '\\' || mac[1] != '\"') {
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pe(lineno);
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printf("Command too long\n");
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}
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/*
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* Is it a known command?
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*/
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checkknown(mac);
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/*
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* Should we add it?
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*/
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if (eq(mac, "de"))
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addcmd(line);
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chkcmd(line, mac);
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}
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/*
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* At this point we process the line looking
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* for \s and \f.
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*/
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for (i=0; line[i]; i++)
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if (line[i]=='\\' && (i==0 || line[i-1]!='\\')) {
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if (!sflag && line[++i]=='s') {
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pl = line[++i];
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if (isdigit(pl)) {
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n = pl - '0';
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pl = ' ';
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} else
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n = 0;
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while (isdigit(line[++i]))
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n = 10 * n + line[i] - '0';
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i--;
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if (n == 0) {
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if (stk[stktop].opno == SZ) {
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stktop--;
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} else {
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pe(lineno);
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printf("unmatched \\s0\n");
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}
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} else {
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stk[++stktop].opno = SZ;
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stk[stktop].pl = pl;
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stk[stktop].parm = n;
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stk[stktop].lno = lineno;
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}
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} else if (!fflag && line[i]=='f') {
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n = line[++i];
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if (n == 'P') {
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if (stk[stktop].opno == FT) {
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stktop--;
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} else {
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pe(lineno);
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printf("unmatched \\fP\n");
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}
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} else {
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stk[++stktop].opno = FT;
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stk[stktop].pl = 1;
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stk[stktop].parm = n;
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stk[stktop].lno = lineno;
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}
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}
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}
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}
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/*
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* We've hit the end and look at all this stuff that hasn't been
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* matched yet! Complain, complain.
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*/
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for (i=stktop; i>=0; i--) {
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complain(i);
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}
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}
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void
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complain(int i)
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{
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pe(stk[i].lno);
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printf("Unmatched ");
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prop(i);
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printf("\n");
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}
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void
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prop(int i)
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{
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if (stk[i].pl == 0)
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printf(".%s", br[stk[i].opno].opbr);
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else switch(stk[i].opno) {
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case SZ:
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printf("\\s%c%d", stk[i].pl, stk[i].parm);
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break;
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case FT:
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printf("\\f%c", stk[i].parm);
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break;
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default:
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printf("Bug: stk[%d].opno = %d = .%s, .%s",
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i, stk[i].opno, br[stk[i].opno].opbr, br[stk[i].opno].clbr);
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}
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}
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void
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chkcmd(const char *line __unused, const char *mac)
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{
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int i;
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/*
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* Check to see if it matches top of stack.
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*/
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if (stktop >= 0 && eq(mac, br[stk[stktop].opno].clbr))
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stktop--; /* OK. Pop & forget */
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else {
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/* No. Maybe it's an opener */
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for (i=0; br[i].opbr; i++) {
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if (eq(mac, br[i].opbr)) {
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/* Found. Push it. */
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stktop++;
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stk[stktop].opno = i;
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stk[stktop].pl = 0;
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stk[stktop].parm = 0;
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stk[stktop].lno = lineno;
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break;
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}
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/*
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* Maybe it's an unmatched closer.
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* NOTE: this depends on the fact
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* that none of the closers can be
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* openers too.
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*/
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if (eq(mac, br[i].clbr)) {
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nomatch(mac);
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break;
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}
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}
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}
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}
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void
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nomatch(const char *mac)
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{
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int i, j;
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/*
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* Look for a match further down on stack
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* If we find one, it suggests that the stuff in
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* between is supposed to match itself.
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*/
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for (j=stktop; j>=0; j--)
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if (eq(mac,br[stk[j].opno].clbr)) {
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/* Found. Make a good diagnostic. */
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if (j == stktop-2) {
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/*
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* Check for special case \fx..\fR and don't
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* complain.
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*/
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if (stk[j+1].opno==FT && stk[j+1].parm!='R'
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&& stk[j+2].opno==FT && stk[j+2].parm=='R') {
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stktop = j -1;
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return;
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}
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/*
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* We have two unmatched frobs. Chances are
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* they were intended to match, so we mention
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* them together.
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*/
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pe(stk[j+1].lno);
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prop(j+1);
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printf(" does not match %d: ", stk[j+2].lno);
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prop(j+2);
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printf("\n");
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} else for (i=j+1; i <= stktop; i++) {
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complain(i);
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}
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stktop = j-1;
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return;
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}
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/* Didn't find one. Throw this away. */
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pe(lineno);
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printf("Unmatched .%s\n", mac);
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}
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/* eq: are two strings equal? */
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int
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eq(const char *s1, const char *s2)
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{
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return (strcmp(s1, s2) == 0);
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}
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/* print the first part of an error message, given the line number */
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void
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pe(int linen)
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{
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if (nfiles > 1)
|
|
printf("%s: ", cfilename);
|
|
printf("%d: ", linen);
|
|
}
|
|
|
|
void
|
|
checkknown(const char *mac)
|
|
{
|
|
|
|
if (eq(mac, "."))
|
|
return;
|
|
if (binsrch(mac) >= 0)
|
|
return;
|
|
if (mac[0] == '\\' && mac[1] == '"') /* comments */
|
|
return;
|
|
|
|
pe(lineno);
|
|
printf("Unknown command: .%s\n", mac);
|
|
}
|
|
|
|
/*
|
|
* We have a .de xx line in "line". Add xx to the list of known commands.
|
|
*/
|
|
void
|
|
addcmd(char *line)
|
|
{
|
|
char *mac;
|
|
|
|
/* grab the macro being defined */
|
|
mac = line+4;
|
|
while (isspace(*mac))
|
|
mac++;
|
|
if (*mac == 0) {
|
|
pe(lineno);
|
|
printf("illegal define: %s\n", line);
|
|
return;
|
|
}
|
|
mac[2] = 0;
|
|
if (isspace(mac[1]) || mac[1] == '\\')
|
|
mac[1] = 0;
|
|
if (ncmds >= MAXCMDS) {
|
|
printf("Only %d known commands allowed\n", MAXCMDS);
|
|
exit(1);
|
|
}
|
|
addmac(mac);
|
|
}
|
|
|
|
/*
|
|
* Add mac to the list. We should really have some kind of tree
|
|
* structure here but this is a quick-and-dirty job and I just don't
|
|
* have time to mess with it. (I wonder if this will come back to haunt
|
|
* me someday?) Anyway, I claim that .de is fairly rare in user
|
|
* nroff programs, and the register loop below is pretty fast.
|
|
*/
|
|
void
|
|
addmac(const char *mac)
|
|
{
|
|
const char **src, **dest, **loc;
|
|
|
|
if (binsrch(mac) >= 0){ /* it's OK to redefine something */
|
|
#ifdef DEBUG
|
|
printf("binsrch(%s) -> already in table\n", mac);
|
|
#endif
|
|
return;
|
|
}
|
|
/* binsrch sets slot as a side effect */
|
|
#ifdef DEBUG
|
|
printf("binsrch(%s) -> %d\n", mac, slot);
|
|
#endif
|
|
loc = &knowncmds[slot];
|
|
src = &knowncmds[ncmds-1];
|
|
dest = src+1;
|
|
while (dest > loc)
|
|
*dest-- = *src--;
|
|
*loc = strcpy(malloc(3), mac);
|
|
ncmds++;
|
|
#ifdef DEBUG
|
|
printf("after: %s %s %s %s %s, %d cmds\n", knowncmds[slot-2], knowncmds[slot-1], knowncmds[slot], knowncmds[slot+1], knowncmds[slot+2], ncmds);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Do a binary search in knowncmds for mac.
|
|
* If found, return the index. If not, return -1.
|
|
*/
|
|
int
|
|
binsrch(const char *mac)
|
|
{
|
|
const char *p; /* pointer to current cmd in list */
|
|
int d; /* difference if any */
|
|
int mid; /* mid point in binary search */
|
|
int top, bot; /* boundaries of bin search, inclusive */
|
|
|
|
top = ncmds-1;
|
|
bot = 0;
|
|
while (top >= bot) {
|
|
mid = (top+bot)/2;
|
|
p = knowncmds[mid];
|
|
d = p[0] - mac[0];
|
|
if (d == 0)
|
|
d = p[1] - mac[1];
|
|
if (d == 0)
|
|
return mid;
|
|
if (d < 0)
|
|
bot = mid + 1;
|
|
else
|
|
top = mid - 1;
|
|
}
|
|
slot = bot; /* place it would have gone */
|
|
return -1;
|
|
}
|