checknr.c revision 227234
11590Srgrimes/* 21590Srgrimes * Copyright (c) 1980, 1993 31590Srgrimes * The Regents of the University of California. All rights reserved. 41590Srgrimes * 51590Srgrimes * Redistribution and use in source and binary forms, with or without 61590Srgrimes * modification, are permitted provided that the following conditions 71590Srgrimes * are met: 81590Srgrimes * 1. Redistributions of source code must retain the above copyright 91590Srgrimes * notice, this list of conditions and the following disclaimer. 101590Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111590Srgrimes * notice, this list of conditions and the following disclaimer in the 121590Srgrimes * documentation and/or other materials provided with the distribution. 131590Srgrimes * 4. Neither the name of the University nor the names of its contributors 141590Srgrimes * may be used to endorse or promote products derived from this software 151590Srgrimes * without specific prior written permission. 161590Srgrimes * 171590Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181590Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191590Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201590Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211590Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221590Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231590Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241590Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251590Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261590Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271590Srgrimes * SUCH DAMAGE. 281590Srgrimes */ 291590Srgrimes 301590Srgrimes#ifndef lint 3141568Sarchiestatic const char copyright[] = 321590Srgrimes"@(#) Copyright (c) 1980, 1993\n\ 331590Srgrimes The Regents of the University of California. All rights reserved.\n"; 341590Srgrimes#endif /* not lint */ 351590Srgrimes 3691389Sdwmalone#if 0 371590Srgrimes#ifndef lint 3891389Sdwmalonestatic char sccsid[] = "@(#)checknr.c 8.1 (Berkeley) 6/6/93"; 391590Srgrimes#endif /* not lint */ 4091389Sdwmalone#endif 411590Srgrimes 4291389Sdwmalone#include <sys/cdefs.h> 4391389Sdwmalone__FBSDID("$FreeBSD: head/usr.bin/checknr/checknr.c 227234 2011-11-06 18:49:03Z ed $"); 4491389Sdwmalone 451590Srgrimes/* 461590Srgrimes * checknr: check an nroff/troff input file for matching macro calls. 471590Srgrimes * we also attempt to match size and font changes, but only the embedded 481590Srgrimes * kind. These must end in \s0 and \fP resp. Maybe more sophistication 491590Srgrimes * later but for now think of these restrictions as contributions to 501590Srgrimes * structured typesetting. 511590Srgrimes */ 52132178Stjr#include <err.h> 531590Srgrimes#include <stdio.h> 5426881Scharnier#include <stdlib.h> 5526881Scharnier#include <string.h> 561590Srgrimes#include <ctype.h> 571590Srgrimes 581590Srgrimes#define MAXSTK 100 /* Stack size */ 591590Srgrimes#define MAXBR 100 /* Max number of bracket pairs known */ 601590Srgrimes#define MAXCMDS 500 /* Max number of commands known */ 611590Srgrimes 62227234Sedstatic void addcmd(char *); 63227234Sedstatic void addmac(const char *); 64227234Sedstatic int binsrch(const char *); 65227234Sedstatic void checkknown(const char *); 66227234Sedstatic void chkcmd(const char *, const char *); 67227234Sedstatic void complain(int); 68227234Sedstatic int eq(const char *, const char *); 69227234Sedstatic void nomatch(const char *); 70227234Sedstatic void pe(int); 71227234Sedstatic void process(FILE *); 72227234Sedstatic void prop(int); 7392920Simpstatic void usage(void); 7426881Scharnier 751590Srgrimes/* 761590Srgrimes * The stack on which we remember what we've seen so far. 771590Srgrimes */ 78227234Sedstatic struct stkstr { 791590Srgrimes int opno; /* number of opening bracket */ 801590Srgrimes int pl; /* '+', '-', ' ' for \s, 1 for \f, 0 for .ft */ 811590Srgrimes int parm; /* parm to size, font, etc */ 82219126Sbrucec int lno; /* line number */ 831590Srgrimes} stk[MAXSTK]; 84227234Sedstatic int stktop; 851590Srgrimes 861590Srgrimes/* 871590Srgrimes * The kinds of opening and closing brackets. 881590Srgrimes */ 89227234Sedstatic struct brstr { 9091389Sdwmalone const char *opbr; 9191389Sdwmalone const char *clbr; 921590Srgrimes} br[MAXBR] = { 931590Srgrimes /* A few bare bones troff commands */ 941590Srgrimes#define SZ 0 9526881Scharnier {"sz", "sz"}, /* also \s */ 961590Srgrimes#define FT 1 9726881Scharnier {"ft", "ft"}, /* also \f */ 981590Srgrimes /* the -mm package */ 9926881Scharnier {"AL", "LE"}, 10026881Scharnier {"AS", "AE"}, 10126881Scharnier {"BL", "LE"}, 10226881Scharnier {"BS", "BE"}, 10326881Scharnier {"DF", "DE"}, 10426881Scharnier {"DL", "LE"}, 10526881Scharnier {"DS", "DE"}, 10626881Scharnier {"FS", "FE"}, 10726881Scharnier {"ML", "LE"}, 10826881Scharnier {"NS", "NE"}, 10926881Scharnier {"RL", "LE"}, 11026881Scharnier {"VL", "LE"}, 1111590Srgrimes /* the -ms package */ 11226881Scharnier {"AB", "AE"}, 11326881Scharnier {"BD", "DE"}, 11426881Scharnier {"CD", "DE"}, 11526881Scharnier {"DS", "DE"}, 11626881Scharnier {"FS", "FE"}, 11726881Scharnier {"ID", "DE"}, 11826881Scharnier {"KF", "KE"}, 11926881Scharnier {"KS", "KE"}, 12026881Scharnier {"LD", "DE"}, 12126881Scharnier {"LG", "NL"}, 12226881Scharnier {"QS", "QE"}, 12326881Scharnier {"RS", "RE"}, 12426881Scharnier {"SM", "NL"}, 12526881Scharnier {"XA", "XE"}, 12626881Scharnier {"XS", "XE"}, 1271590Srgrimes /* The -me package */ 12826881Scharnier {"(b", ")b"}, 12926881Scharnier {"(c", ")c"}, 13026881Scharnier {"(d", ")d"}, 13126881Scharnier {"(f", ")f"}, 13226881Scharnier {"(l", ")l"}, 13326881Scharnier {"(q", ")q"}, 13426881Scharnier {"(x", ")x"}, 13526881Scharnier {"(z", ")z"}, 1361590Srgrimes /* Things needed by preprocessors */ 13726881Scharnier {"EQ", "EN"}, 13826881Scharnier {"TS", "TE"}, 1391590Srgrimes /* Refer */ 14026881Scharnier {"[", "]"}, 14126881Scharnier {0, 0} 1421590Srgrimes}; 1431590Srgrimes 1441590Srgrimes/* 1451590Srgrimes * All commands known to nroff, plus macro packages. 1461590Srgrimes * Used so we can complain about unrecognized commands. 1471590Srgrimes */ 148227234Sedstatic const char *knowncmds[MAXCMDS] = { 1491590Srgrimes"$c", "$f", "$h", "$p", "$s", "(b", "(c", "(d", "(f", "(l", "(q", "(t", 1501590Srgrimes"(x", "(z", ")b", ")c", ")d", ")f", ")l", ")q", ")t", ")x", ")z", "++", 1511590Srgrimes"+c", "1C", "1c", "2C", "2c", "@(", "@)", "@C", "@D", "@F", "@I", "@M", 1521590Srgrimes"@c", "@e", "@f", "@h", "@m", "@n", "@o", "@p", "@r", "@t", "@z", "AB", 1531590Srgrimes"AE", "AF", "AI", "AL", "AM", "AS", "AT", "AU", "AX", "B", "B1", "B2", 1541590Srgrimes"BD", "BE", "BG", "BL", "BS", "BT", "BX", "C1", "C2", "CD", "CM", "CT", 1551590Srgrimes"D", "DA", "DE", "DF", "DL", "DS", "DT", "EC", "EF", "EG", "EH", "EM", 1561590Srgrimes"EN", "EQ", "EX", "FA", "FD", "FE", "FG", "FJ", "FK", "FL", "FN", "FO", 1571590Srgrimes"FQ", "FS", "FV", "FX", "H", "HC", "HD", "HM", "HO", "HU", "I", "ID", 1581590Srgrimes"IE", "IH", "IM", "IP", "IX", "IZ", "KD", "KE", "KF", "KQ", "KS", "LB", 1591590Srgrimes"LC", "LD", "LE", "LG", "LI", "LP", "MC", "ME", "MF", "MH", "ML", "MR", 1601590Srgrimes"MT", "ND", "NE", "NH", "NL", "NP", "NS", "OF", "OH", "OK", "OP", "P", 1611590Srgrimes"P1", "PF", "PH", "PP", "PT", "PX", "PY", "QE", "QP", "QS", "R", "RA", 1621590Srgrimes"RC", "RE", "RL", "RP", "RQ", "RS", "RT", "S", "S0", "S2", "S3", "SA", 1631590Srgrimes"SG", "SH", "SK", "SM", "SP", "SY", "T&", "TA", "TB", "TC", "TD", "TE", 1641590Srgrimes"TH", "TL", "TM", "TP", "TQ", "TR", "TS", "TX", "UL", "US", "UX", "VL", 1651590Srgrimes"WC", "WH", "XA", "XD", "XE", "XF", "XK", "XP", "XS", "[", "[-", "[0", 1661590Srgrimes"[1", "[2", "[3", "[4", "[5", "[<", "[>", "[]", "]", "]-", "]<", "]>", 1671590Srgrimes"][", "ab", "ac", "ad", "af", "am", "ar", "as", "b", "ba", "bc", "bd", 1681590Srgrimes"bi", "bl", "bp", "br", "bx", "c.", "c2", "cc", "ce", "cf", "ch", "cs", 1691590Srgrimes"ct", "cu", "da", "de", "di", "dl", "dn", "ds", "dt", "dw", "dy", "ec", 1701590Srgrimes"ef", "eh", "el", "em", "eo", "ep", "ev", "ex", "fc", "fi", "fl", "fo", 1711590Srgrimes"fp", "ft", "fz", "hc", "he", "hl", "hp", "ht", "hw", "hx", "hy", "i", 1721590Srgrimes"ie", "if", "ig", "in", "ip", "it", "ix", "lc", "lg", "li", "ll", "ln", 1731590Srgrimes"lo", "lp", "ls", "lt", "m1", "m2", "m3", "m4", "mc", "mk", "mo", "n1", 1741590Srgrimes"n2", "na", "ne", "nf", "nh", "nl", "nm", "nn", "np", "nr", "ns", "nx", 1751590Srgrimes"of", "oh", "os", "pa", "pc", "pi", "pl", "pm", "pn", "po", "pp", "ps", 1761590Srgrimes"q", "r", "rb", "rd", "re", "rm", "rn", "ro", "rr", "rs", "rt", "sb", 1771590Srgrimes"sc", "sh", "sk", "so", "sp", "ss", "st", "sv", "sz", "ta", "tc", "th", 1781590Srgrimes"ti", "tl", "tm", "tp", "tr", "u", "uf", "uh", "ul", "vs", "wh", "xp", 1791590Srgrimes"yr", 0 1801590Srgrimes}; 1811590Srgrimes 182227234Sedstatic int lineno; /* current line number in input file */ 183227234Sedstatic const char *cfilename; /* name of current file */ 184227234Sedstatic int nfiles; /* number of files to process */ 185227234Sedstatic int fflag; /* -f: ignore \f */ 186227234Sedstatic int sflag; /* -s: ignore \s */ 187227234Sedstatic int ncmds; /* size of knowncmds */ 188227234Sedstatic int slot; /* slot in knowncmds found by binsrch */ 1891590Srgrimes 19026881Scharnierint 191100813Sdwmalonemain(int argc, char **argv) 1921590Srgrimes{ 1931590Srgrimes FILE *f; 1941590Srgrimes int i; 1951590Srgrimes char *cp; 1961590Srgrimes char b1[4]; 1971590Srgrimes 1981590Srgrimes /* Figure out how many known commands there are */ 1991590Srgrimes while (knowncmds[ncmds]) 2001590Srgrimes ncmds++; 2011590Srgrimes while (argc > 1 && argv[1][0] == '-') { 2021590Srgrimes switch(argv[1][1]) { 2031590Srgrimes 2041590Srgrimes /* -a: add pairs of macros */ 2051590Srgrimes case 'a': 2061590Srgrimes i = strlen(argv[1]) - 2; 2071590Srgrimes if (i % 6 != 0) 2081590Srgrimes usage(); 2091590Srgrimes /* look for empty macro slots */ 2101590Srgrimes for (i=0; br[i].opbr; i++) 2111590Srgrimes ; 2121590Srgrimes for (cp=argv[1]+3; cp[-1]; cp += 6) { 21391389Sdwmalone br[i].opbr = strncpy(malloc(3), cp, 2); 21491389Sdwmalone br[i].clbr = strncpy(malloc(3), cp+3, 2); 2151590Srgrimes addmac(br[i].opbr); /* knows pairs are also known cmds */ 2161590Srgrimes addmac(br[i].clbr); 2171590Srgrimes i++; 2181590Srgrimes } 2191590Srgrimes break; 2201590Srgrimes 2211590Srgrimes /* -c: add known commands */ 2221590Srgrimes case 'c': 2231590Srgrimes i = strlen(argv[1]) - 2; 2241590Srgrimes if (i % 3 != 0) 2251590Srgrimes usage(); 2261590Srgrimes for (cp=argv[1]+3; cp[-1]; cp += 3) { 2271590Srgrimes if (cp[2] && cp[2] != '.') 2281590Srgrimes usage(); 2291590Srgrimes strncpy(b1, cp, 2); 2309376Sasami b1[2] = '\0'; 2311590Srgrimes addmac(b1); 2321590Srgrimes } 2331590Srgrimes break; 2341590Srgrimes 2351590Srgrimes /* -f: ignore font changes */ 2361590Srgrimes case 'f': 2371590Srgrimes fflag = 1; 2381590Srgrimes break; 2391590Srgrimes 2401590Srgrimes /* -s: ignore size changes */ 2411590Srgrimes case 's': 2421590Srgrimes sflag = 1; 2431590Srgrimes break; 2441590Srgrimes default: 2451590Srgrimes usage(); 2461590Srgrimes } 2471590Srgrimes argc--; argv++; 2481590Srgrimes } 2491590Srgrimes 2501590Srgrimes nfiles = argc - 1; 2511590Srgrimes 2521590Srgrimes if (nfiles > 0) { 2531590Srgrimes for (i=1; i<argc; i++) { 2541590Srgrimes cfilename = argv[i]; 2551590Srgrimes f = fopen(cfilename, "r"); 2561590Srgrimes if (f == NULL) 257132178Stjr warn("%s", cfilename); 258115601Stjr else { 2591590Srgrimes process(f); 260115601Stjr fclose(f); 261115601Stjr } 2621590Srgrimes } 2631590Srgrimes } else { 2641590Srgrimes cfilename = "stdin"; 2651590Srgrimes process(stdin); 2661590Srgrimes } 2671590Srgrimes exit(0); 2681590Srgrimes} 2691590Srgrimes 27026881Scharnierstatic void 271100813Sdwmaloneusage(void) 2721590Srgrimes{ 27326881Scharnier fprintf(stderr, 27426881Scharnier "usage: checknr [-a.xx.yy.xx.yy...] [-c.xx.xx.xx...] [-s] [-f] file\n"); 2751590Srgrimes exit(1); 2761590Srgrimes} 2771590Srgrimes 278227234Sedstatic void 279100813Sdwmaloneprocess(FILE *f) 2801590Srgrimes{ 28191389Sdwmalone int i, n; 2821590Srgrimes char mac[5]; /* The current macro or nroff command */ 2831590Srgrimes int pl; 28491389Sdwmalone static char line[256]; /* the current line */ 2851590Srgrimes 2861590Srgrimes stktop = -1; 2871590Srgrimes for (lineno = 1; fgets(line, sizeof line, f); lineno++) { 2881590Srgrimes if (line[0] == '.') { 2891590Srgrimes /* 2901590Srgrimes * find and isolate the macro/command name. 2911590Srgrimes */ 2921590Srgrimes strncpy(mac, line+1, 4); 2931590Srgrimes if (isspace(mac[0])) { 2941590Srgrimes pe(lineno); 2951590Srgrimes printf("Empty command\n"); 2961590Srgrimes } else if (isspace(mac[1])) { 2971590Srgrimes mac[1] = 0; 2981590Srgrimes } else if (isspace(mac[2])) { 2991590Srgrimes mac[2] = 0; 3001590Srgrimes } else if (mac[0] != '\\' || mac[1] != '\"') { 3011590Srgrimes pe(lineno); 3021590Srgrimes printf("Command too long\n"); 3031590Srgrimes } 3041590Srgrimes 3051590Srgrimes /* 3061590Srgrimes * Is it a known command? 3071590Srgrimes */ 3081590Srgrimes checkknown(mac); 3091590Srgrimes 3101590Srgrimes /* 3111590Srgrimes * Should we add it? 3121590Srgrimes */ 3131590Srgrimes if (eq(mac, "de")) 3141590Srgrimes addcmd(line); 3151590Srgrimes 3161590Srgrimes chkcmd(line, mac); 3171590Srgrimes } 3181590Srgrimes 3191590Srgrimes /* 3201590Srgrimes * At this point we process the line looking 3211590Srgrimes * for \s and \f. 3221590Srgrimes */ 3231590Srgrimes for (i=0; line[i]; i++) 3241590Srgrimes if (line[i]=='\\' && (i==0 || line[i-1]!='\\')) { 3251590Srgrimes if (!sflag && line[++i]=='s') { 3261590Srgrimes pl = line[++i]; 3271590Srgrimes if (isdigit(pl)) { 3281590Srgrimes n = pl - '0'; 3291590Srgrimes pl = ' '; 3301590Srgrimes } else 3311590Srgrimes n = 0; 3321590Srgrimes while (isdigit(line[++i])) 3331590Srgrimes n = 10 * n + line[i] - '0'; 3341590Srgrimes i--; 3351590Srgrimes if (n == 0) { 3361590Srgrimes if (stk[stktop].opno == SZ) { 3371590Srgrimes stktop--; 3381590Srgrimes } else { 3391590Srgrimes pe(lineno); 3401590Srgrimes printf("unmatched \\s0\n"); 3411590Srgrimes } 3421590Srgrimes } else { 3431590Srgrimes stk[++stktop].opno = SZ; 3441590Srgrimes stk[stktop].pl = pl; 3451590Srgrimes stk[stktop].parm = n; 3461590Srgrimes stk[stktop].lno = lineno; 3471590Srgrimes } 3481590Srgrimes } else if (!fflag && line[i]=='f') { 3491590Srgrimes n = line[++i]; 3501590Srgrimes if (n == 'P') { 3511590Srgrimes if (stk[stktop].opno == FT) { 3521590Srgrimes stktop--; 3531590Srgrimes } else { 3541590Srgrimes pe(lineno); 3551590Srgrimes printf("unmatched \\fP\n"); 3561590Srgrimes } 3571590Srgrimes } else { 3581590Srgrimes stk[++stktop].opno = FT; 3591590Srgrimes stk[stktop].pl = 1; 3601590Srgrimes stk[stktop].parm = n; 3611590Srgrimes stk[stktop].lno = lineno; 3621590Srgrimes } 3631590Srgrimes } 3641590Srgrimes } 3651590Srgrimes } 3661590Srgrimes /* 3671590Srgrimes * We've hit the end and look at all this stuff that hasn't been 3681590Srgrimes * matched yet! Complain, complain. 3691590Srgrimes */ 3701590Srgrimes for (i=stktop; i>=0; i--) { 3711590Srgrimes complain(i); 3721590Srgrimes } 3731590Srgrimes} 3741590Srgrimes 375227234Sedstatic void 376100813Sdwmalonecomplain(int i) 3771590Srgrimes{ 3781590Srgrimes pe(stk[i].lno); 3791590Srgrimes printf("Unmatched "); 3801590Srgrimes prop(i); 3811590Srgrimes printf("\n"); 3821590Srgrimes} 3831590Srgrimes 384227234Sedstatic void 385100813Sdwmaloneprop(int i) 3861590Srgrimes{ 3871590Srgrimes if (stk[i].pl == 0) 3881590Srgrimes printf(".%s", br[stk[i].opno].opbr); 3891590Srgrimes else switch(stk[i].opno) { 3901590Srgrimes case SZ: 3911590Srgrimes printf("\\s%c%d", stk[i].pl, stk[i].parm); 3921590Srgrimes break; 3931590Srgrimes case FT: 3941590Srgrimes printf("\\f%c", stk[i].parm); 3951590Srgrimes break; 3961590Srgrimes default: 3971590Srgrimes printf("Bug: stk[%d].opno = %d = .%s, .%s", 3981590Srgrimes i, stk[i].opno, br[stk[i].opno].opbr, br[stk[i].opno].clbr); 3991590Srgrimes } 4001590Srgrimes} 4011590Srgrimes 402227234Sedstatic void 403100813Sdwmalonechkcmd(const char *line __unused, const char *mac) 4041590Srgrimes{ 40591389Sdwmalone int i; 4061590Srgrimes 4071590Srgrimes /* 4081590Srgrimes * Check to see if it matches top of stack. 4091590Srgrimes */ 4101590Srgrimes if (stktop >= 0 && eq(mac, br[stk[stktop].opno].clbr)) 4111590Srgrimes stktop--; /* OK. Pop & forget */ 4121590Srgrimes else { 4131590Srgrimes /* No. Maybe it's an opener */ 4141590Srgrimes for (i=0; br[i].opbr; i++) { 4151590Srgrimes if (eq(mac, br[i].opbr)) { 4161590Srgrimes /* Found. Push it. */ 4171590Srgrimes stktop++; 4181590Srgrimes stk[stktop].opno = i; 4191590Srgrimes stk[stktop].pl = 0; 4201590Srgrimes stk[stktop].parm = 0; 4211590Srgrimes stk[stktop].lno = lineno; 4221590Srgrimes break; 4231590Srgrimes } 4241590Srgrimes /* 4251590Srgrimes * Maybe it's an unmatched closer. 4261590Srgrimes * NOTE: this depends on the fact 4271590Srgrimes * that none of the closers can be 4281590Srgrimes * openers too. 4291590Srgrimes */ 4301590Srgrimes if (eq(mac, br[i].clbr)) { 4311590Srgrimes nomatch(mac); 4321590Srgrimes break; 4331590Srgrimes } 4341590Srgrimes } 4351590Srgrimes } 4361590Srgrimes} 4371590Srgrimes 438227234Sedstatic void 439100813Sdwmalonenomatch(const char *mac) 4401590Srgrimes{ 44191389Sdwmalone int i, j; 4421590Srgrimes 4431590Srgrimes /* 4441590Srgrimes * Look for a match further down on stack 4451590Srgrimes * If we find one, it suggests that the stuff in 4461590Srgrimes * between is supposed to match itself. 4471590Srgrimes */ 4481590Srgrimes for (j=stktop; j>=0; j--) 4491590Srgrimes if (eq(mac,br[stk[j].opno].clbr)) { 4501590Srgrimes /* Found. Make a good diagnostic. */ 4511590Srgrimes if (j == stktop-2) { 4521590Srgrimes /* 4531590Srgrimes * Check for special case \fx..\fR and don't 4541590Srgrimes * complain. 4551590Srgrimes */ 4561590Srgrimes if (stk[j+1].opno==FT && stk[j+1].parm!='R' 4571590Srgrimes && stk[j+2].opno==FT && stk[j+2].parm=='R') { 4581590Srgrimes stktop = j -1; 4591590Srgrimes return; 4601590Srgrimes } 4611590Srgrimes /* 4621590Srgrimes * We have two unmatched frobs. Chances are 4631590Srgrimes * they were intended to match, so we mention 4641590Srgrimes * them together. 4651590Srgrimes */ 4661590Srgrimes pe(stk[j+1].lno); 4671590Srgrimes prop(j+1); 4681590Srgrimes printf(" does not match %d: ", stk[j+2].lno); 4691590Srgrimes prop(j+2); 4701590Srgrimes printf("\n"); 4711590Srgrimes } else for (i=j+1; i <= stktop; i++) { 4721590Srgrimes complain(i); 4731590Srgrimes } 4741590Srgrimes stktop = j-1; 4751590Srgrimes return; 4761590Srgrimes } 4771590Srgrimes /* Didn't find one. Throw this away. */ 4781590Srgrimes pe(lineno); 4791590Srgrimes printf("Unmatched .%s\n", mac); 4801590Srgrimes} 4811590Srgrimes 4821590Srgrimes/* eq: are two strings equal? */ 483227234Sedstatic int 484100813Sdwmaloneeq(const char *s1, const char *s2) 4851590Srgrimes{ 4861590Srgrimes return (strcmp(s1, s2) == 0); 4871590Srgrimes} 4881590Srgrimes 4891590Srgrimes/* print the first part of an error message, given the line number */ 490227234Sedstatic void 491100813Sdwmalonepe(int linen) 4921590Srgrimes{ 4931590Srgrimes if (nfiles > 1) 4941590Srgrimes printf("%s: ", cfilename); 49591389Sdwmalone printf("%d: ", linen); 4961590Srgrimes} 4971590Srgrimes 498227234Sedstatic void 499100813Sdwmalonecheckknown(const char *mac) 5001590Srgrimes{ 5011590Srgrimes 5021590Srgrimes if (eq(mac, ".")) 5031590Srgrimes return; 5041590Srgrimes if (binsrch(mac) >= 0) 5051590Srgrimes return; 5061590Srgrimes if (mac[0] == '\\' && mac[1] == '"') /* comments */ 5071590Srgrimes return; 5081590Srgrimes 5091590Srgrimes pe(lineno); 5101590Srgrimes printf("Unknown command: .%s\n", mac); 5111590Srgrimes} 5121590Srgrimes 5131590Srgrimes/* 5141590Srgrimes * We have a .de xx line in "line". Add xx to the list of known commands. 5151590Srgrimes */ 516227234Sedstatic void 517100813Sdwmaloneaddcmd(char *line) 5181590Srgrimes{ 5191590Srgrimes char *mac; 5201590Srgrimes 5211590Srgrimes /* grab the macro being defined */ 5221590Srgrimes mac = line+4; 5231590Srgrimes while (isspace(*mac)) 5241590Srgrimes mac++; 5251590Srgrimes if (*mac == 0) { 5261590Srgrimes pe(lineno); 5271590Srgrimes printf("illegal define: %s\n", line); 5281590Srgrimes return; 5291590Srgrimes } 5301590Srgrimes mac[2] = 0; 5311590Srgrimes if (isspace(mac[1]) || mac[1] == '\\') 5321590Srgrimes mac[1] = 0; 5331590Srgrimes if (ncmds >= MAXCMDS) { 5341590Srgrimes printf("Only %d known commands allowed\n", MAXCMDS); 5351590Srgrimes exit(1); 5361590Srgrimes } 5371590Srgrimes addmac(mac); 5381590Srgrimes} 5391590Srgrimes 5401590Srgrimes/* 5411590Srgrimes * Add mac to the list. We should really have some kind of tree 5421590Srgrimes * structure here but this is a quick-and-dirty job and I just don't 5431590Srgrimes * have time to mess with it. (I wonder if this will come back to haunt 5441590Srgrimes * me someday?) Anyway, I claim that .de is fairly rare in user 5451590Srgrimes * nroff programs, and the register loop below is pretty fast. 5461590Srgrimes */ 547227234Sedstatic void 548100813Sdwmaloneaddmac(const char *mac) 5491590Srgrimes{ 55091389Sdwmalone const char **src, **dest, **loc; 5511590Srgrimes 5521590Srgrimes if (binsrch(mac) >= 0){ /* it's OK to redefine something */ 5531590Srgrimes#ifdef DEBUG 5541590Srgrimes printf("binsrch(%s) -> already in table\n", mac); 55591389Sdwmalone#endif 5561590Srgrimes return; 5571590Srgrimes } 5581590Srgrimes /* binsrch sets slot as a side effect */ 5591590Srgrimes#ifdef DEBUG 5601590Srgrimesprintf("binsrch(%s) -> %d\n", mac, slot); 5611590Srgrimes#endif 5621590Srgrimes loc = &knowncmds[slot]; 5631590Srgrimes src = &knowncmds[ncmds-1]; 5641590Srgrimes dest = src+1; 5651590Srgrimes while (dest > loc) 5661590Srgrimes *dest-- = *src--; 56791389Sdwmalone *loc = strcpy(malloc(3), mac); 5681590Srgrimes ncmds++; 5691590Srgrimes#ifdef DEBUG 5701590Srgrimesprintf("after: %s %s %s %s %s, %d cmds\n", knowncmds[slot-2], knowncmds[slot-1], knowncmds[slot], knowncmds[slot+1], knowncmds[slot+2], ncmds); 5711590Srgrimes#endif 5721590Srgrimes} 5731590Srgrimes 5741590Srgrimes/* 5751590Srgrimes * Do a binary search in knowncmds for mac. 5761590Srgrimes * If found, return the index. If not, return -1. 5771590Srgrimes */ 578227234Sedstatic int 579100813Sdwmalonebinsrch(const char *mac) 5801590Srgrimes{ 58191389Sdwmalone const char *p; /* pointer to current cmd in list */ 58291389Sdwmalone int d; /* difference if any */ 58391389Sdwmalone int mid; /* mid point in binary search */ 58491389Sdwmalone int top, bot; /* boundaries of bin search, inclusive */ 5851590Srgrimes 5861590Srgrimes top = ncmds-1; 5871590Srgrimes bot = 0; 5881590Srgrimes while (top >= bot) { 5891590Srgrimes mid = (top+bot)/2; 5901590Srgrimes p = knowncmds[mid]; 5911590Srgrimes d = p[0] - mac[0]; 5921590Srgrimes if (d == 0) 5931590Srgrimes d = p[1] - mac[1]; 5941590Srgrimes if (d == 0) 5951590Srgrimes return mid; 5961590Srgrimes if (d < 0) 5971590Srgrimes bot = mid + 1; 5981590Srgrimes else 5991590Srgrimes top = mid - 1; 6001590Srgrimes } 6011590Srgrimes slot = bot; /* place it would have gone */ 6021590Srgrimes return -1; 6031590Srgrimes} 604