776 lines
17 KiB
C
776 lines
17 KiB
C
/*
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* nreq.c - cawf(1) processing of nroff requests
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*/
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/*
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* Copyright (c) 1991 Purdue University Research Foundation,
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* West Lafayette, Indiana 47907. All rights reserved.
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*
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* Written by Victor A. Abell <abe@mace.cc.purdue.edu>, Purdue
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* University Computing Center. Not derived from licensed software;
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* derived from awf(1) by Henry Spencer of the University of Toronto.
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*
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* Permission is granted to anyone to use this software for any
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* purpose on any computer system, and to alter it and redistribute
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* it freely, subject to the following restrictions:
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*
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* 1. The author is not responsible for any consequences of use of
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* this software, even if they arise from flaws in it.
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*
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* 2. The origin of this software must not be misrepresented, either
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* by explicit claim or by omission. Credits must appear in the
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* documentation.
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*
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* 3. Altered versions must be plainly marked as such, and must not
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* be misrepresented as being the original software. Credits must
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* appear in the documentation.
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*
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* 4. This notice may not be removed or altered.
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*/
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#include "cawf.h"
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#include <ctype.h>
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/*
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* Prototypes for request processing functions.
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*/
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static void nr_UL(unsigned char *line, int brk);
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static void nr_Ub(unsigned char *line, int brk);
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static void nr_Uc(unsigned char *line, int brk);
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static void nr_Uf(unsigned char *line, int brk);
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static void nr_Ur(unsigned char *line, int brk);
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static void nr_ad(unsigned char *line, int brk);
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static void nr_bp(unsigned char *line, int brk);
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static void nr_br(unsigned char *line, int brk);
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static void nr_ce(unsigned char *line, int brk);
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static void nr_di(unsigned char *line, int brk);
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static void nr_ds(unsigned char *line, int brk);
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static void nr_fi(unsigned char *line, int brk);
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static void nr_fl(unsigned char *line, int brk);
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static void nr_ft(unsigned char *line, int brk);
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static void nr_it(unsigned char *line, int brk);
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static void nr_na(unsigned char *line, int brk);
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static void nr_nf(unsigned char *line, int brk);
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static void nr_ns(unsigned char *line, int brk);
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static void nr_rm(unsigned char *line, int brk);
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static void nr_rn(unsigned char *line, int brk);
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static void nr_rr(unsigned char *line, int brk);
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static void nr_rs(unsigned char *line, int brk);
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static void nr_tm(unsigned char *line, int brk);
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static void nr_tr(unsigned char *line, int brk);
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static void nr_nil(unsigned char *line, int brk);
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/*
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* NrReqt[] - nroff request processing table
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*
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* CAUTION: place new entries in their proper alphabetical order, since
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* this table is processed with a binary search.
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*/
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static struct nr_req {
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char *nm; /* nroff request */
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void (*fun)(); /* processing function */
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} NrReqt[] = {
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{ "\\\"", nr_nil }, /* backslash-quote */
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{ "^#", nr_UL },
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{ "^=", nr_UL },
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{ "^b", nr_Ub },
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{ "^c", nr_Uc },
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{ "^d", nr_nil },
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{ "^e", nr_nil },
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{ "^f", nr_Uf },
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{ "^r", nr_Ur },
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{ "^x", nr_nil },
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{ "ad", nr_ad },
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{ "bp", nr_bp },
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{ "br", nr_br },
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{ "ce", nr_ce },
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{ "di", nr_di },
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{ "ds", nr_ds },
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{ "fi", nr_fi },
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{ "fl", nr_fl },
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{ "ft", nr_ft },
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{ "hy", nr_nil },
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{ "i0", nr_nil },
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{ "it", nr_it },
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{ "lg", nr_nil },
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{ "li", nr_nil },
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{ "na", nr_na },
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{ "nf", nr_nf },
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{ "ns", nr_ns },
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{ "ps", nr_nil },
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{ "rm", nr_rm },
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{ "rn", nr_rn },
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{ "rr", nr_rr },
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{ "rs", nr_rs },
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{ "tm", nr_tm },
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{ "tr", nr_tr },
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{ "vs", nr_nil },
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};
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/*
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* Nreq(line, brk) - process miscellaneous nroff requests from line
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* buffer with request status of (brk)
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*/
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void Nreq(unsigned char *line, int brk) {
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unsigned char c[3]; /* command buffer */
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int cmp, hi, low, mid; /* binary search indixes */
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c[0] = c[1] = c[2] = '\0';
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if ((c[0] = line[1]) != '\0')
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c[1] = line[2];
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low = mid = 0;
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hi = sizeof(NrReqt) / sizeof(struct nr_req);
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while (low <= hi) {
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mid = (low + hi) / 2;
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if ((cmp = strcmp((char *)c, NrReqt[mid].nm)) < 0)
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hi = mid - 1;
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else if (cmp > 0)
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low = mid + 1;
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else {
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(void) (*NrReqt[mid].fun)(line, brk);
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return;
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}
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}
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/*
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* Unknown request starting with a '.' or '\''..
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*/
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Error(WARN, LINE, " unknown request", NULL);
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}
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/*
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* Adjust - "^[.']ad"
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*/
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static void nr_ad(unsigned char *line, int brk) {
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Pass3(NOBREAK, (unsigned char *)"both", NULL, 0);
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}
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/*
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* Begin new page - "^[.']bp"
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*/
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static void nr_bp(unsigned char *line, int brk) {
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Pass3(brk, (unsigned char *)"need", NULL, 999);
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}
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/*
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* Break - "^[.']br"
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*/
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static void nr_br(unsigned char *line, int brk) {
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Pass3(brk, (unsigned char *)"flush", NULL, 0);
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}
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/*
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* Center - "^[.']ce"
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*/
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static void nr_ce(unsigned char *line, int brk) {
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unsigned char *s; /* string poiner */
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if ((s = Field(2, line, 0)) != NULL)
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Centering = atoi((char *)s);
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else
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Centering = 1;
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}
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/*
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* Diversion on and off - "^[.']di"
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*/
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static void nr_di(unsigned char *line, int brk) {
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Pass3(DOBREAK, (unsigned char *)"flush", NULL, 0);
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Divert ^= 1;
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}
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/*
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* Define string - "^[.']ds"
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*/
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static void nr_ds(unsigned char *line, int brk) {
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unsigned char buf[MAXLINE]; /* temporary buffer */
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unsigned char nm[4], nm1[4]; /* name buffers */
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unsigned char *s1, *s2, *s3, /* temporary string pointers */
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*s4;
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if (Asmname(&line[3], nm) == 0) {
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Error(WARN, LINE, " no name", NULL);
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return;
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}
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s1 = Field(3, line, 0);
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s2 = Findstr(nm, s1, 1);
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while (*s2 == '\\' && *(s2 + 1) == '*') {
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s2++;
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s3 = Asmcode(&s2, nm1);
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s2 = Findstr(nm1, NULL, 0);
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}
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if (Hdft) {
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/*
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* Look for names LH, LF, CH, CF, RH, RF.
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*/
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if ((nm[0]=='L' || nm[0]=='C' || nm[0]=='R')
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&& (nm[1]=='F' || nm[1]=='H')) {
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(void) sprintf((char *)buf, "%s", (char *)nm);
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Pass3(NOBREAK, buf, s2, 0);
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}
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}
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}
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/*
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* Fill - "^[.']fi"
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*/
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static void nr_fi(unsigned char *line, int brk) {
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Fill = 1;
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Pass3(brk, (unsigned char *)"flush", NULL, 0);
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}
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/*
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* Flush - "^[.']fl"
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*/
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static void nr_fl(unsigned char *line, int brk) {
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Pass3(brk, (unsigned char *)"flush", NULL, 0);
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}
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/*
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* Font - "^[.']ft <font_name>"
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*/
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static void nr_ft(unsigned char *line, int brk) {
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int i; /* temporary index */
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if (line[3] == '\0' || line[4] == '\0')
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line[4] = 'P';
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if (line[4] == 'P') {
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Font[0] = Prevfont;
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return;
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}
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for (i = 0; Fcode[i].nm; i++) {
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if (Fcode[i].nm == line[4])
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break;
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}
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if (Fcode[i].status == '\0') {
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Error(WARN, LINE, " bad font code", NULL);
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return;
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}
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Prevfont = Font[0];
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Font[0] = line[4];
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}
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/*
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* Input trap - "^[.']it [1 <request>]"
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*/
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static void nr_it(unsigned char *line, int brk) {
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unsigned char buf[MAXLINE]; /* temporary buffer */
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int i; /* temporary index */
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unsigned char *s1, *s2; /* temporary string pointers */
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if ((s1 = Field(2, line, 0)) == NULL) {
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Free(&Aftnxt);
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return;
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}
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if ((i = atoi((char *)s1)) != 1) {
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Error(WARN, LINE, " first .it arg must be 1", NULL);
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return;
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}
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if ((s2 = Field(3, line, 0)) == NULL)
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Free(&Aftnxt);
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else {
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(void) sprintf((char *)buf, "%s,%s",
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(Aftnxt == NULL) ? "" : (char *)Aftnxt,
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(char *)s2);
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Free(&Aftnxt);
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Aftnxt = Newstr(buf);
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}
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}
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/*
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* Comment - "^[.']\\" - do nothing
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*
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* Debug - "^[.']\^d" - do nothing
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*
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* Finalization - "[.']\^e" - do nothing
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*
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* Error file - "^[.']\^x <name>" - do nothing
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*
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* "^[.']i0", "^[.']lg" and "^[.']li" - do nothing
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*
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* Point size - "^[.']ps" - do nothing
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*
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* Vertical spacing - "^[.']vs" - do nothing
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*
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*/
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static void nr_nil(unsigned char *line, int brk) {
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}
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/*
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* No adjust "^[.']na"
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*/
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static void nr_na(unsigned char *line, int brk) {
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Pass3(NOBREAK, (unsigned char *)"left", NULL, 0);
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}
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/*
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* No fill - "^[.']nf"
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*/
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static void nr_nf(unsigned char *line, int brk) {
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Fill = 0;
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Pass3(brk, (unsigned char *)"flush", NULL, 0);
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}
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/*
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* No space - "^[.']ns"
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*/
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static void nr_ns(unsigned char *line, int brk) {
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Pass3(NOBREAK, (unsigned char *)"nospace", NULL, 0);
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}
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/*
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* Remove macro or string - "^[.']rm"
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*/
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static void nr_rm(unsigned char *line, int brk) {
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int i; /* temporary index */
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unsigned char nm[4]; /* name buffer */
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if (Asmname(&line[3], nm) == 0) {
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Error(WARN, LINE, " no name", NULL);
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return;
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}
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if ((i = Findmacro(nm, 0)) >= 0) {
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Delmacro(i);
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return;
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}
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(void) Findstr(nm, NULL, 0);
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if (Sx >= 0) {
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Delstr(Sx);
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return;
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}
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Error(WARN, LINE, " no macro/string", NULL);
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}
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/*
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* Rename macro or string - "^[.']rn"
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*/
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static void nr_rn(unsigned char *line, int brk) {
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int i, j; /* temporary indexes */
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unsigned char nm[4], nm1[4]; /* name buffers */
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unsigned char *s1; /* temporary string pointer */
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if ((s1 = Field(2, line, 0)) == NULL || Asmname(s1, nm) == 0) {
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Error(WARN, LINE, " no name", NULL);
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return;
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}
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if ((s1 = Field(3, line, 0)) == NULL || Asmname(s1, nm1) == 0) {
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Error(WARN, LINE, " no new name", NULL);
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return;
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}
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if ((i = Findmacro(nm, 0)) >= 0) {
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if ((j = Findmacro(nm1, 0)) >= 0)
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Delmacro(j);
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j = Findmacro(nm1, 1);
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Macrotab[j].bx = Macrotab[i].bx;
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Macrotab[i].bx = -1;
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Macrotab[j].ct = Macrotab[i].ct;
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Macrotab[i].ct = 0;
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Delmacro(i);
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return;
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}
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(void) Findstr(nm, NULL, 0);
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if ((i = Sx) >= 0) {
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(void) Findstr(nm1, Str[i].str, 1);
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Delstr(i);
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return;
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}
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if (Findmacro(nm1, 0) < 0)
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(void) Findmacro(nm1, 1);
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}
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/*
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* Remove register - "^[.']rr"
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*/
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static void nr_rr(unsigned char *line, int brk) {
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int i; /* temporary index */
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unsigned char nm[4]; /* name buffer */
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if (Asmname(&line[3], nm) == 0) {
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Error(WARN, LINE, " no name", NULL);
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return;
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}
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if ((i = Findnum(nm, 0, 0)) < 0) {
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Error(WARN, LINE, " no register", NULL);
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return;
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}
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Delnum(i);
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}
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/*
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* Resume space - "^[.']rs"
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*/
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static void nr_rs(unsigned char *line, int brk) {
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Pass3(NOBREAK, (unsigned char *)"yesspace", NULL, 0);
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}
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/*
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* Message - "^[.']tm"
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*/
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static void nr_tm(unsigned char *line, int brk) {
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Pass3(MESSAGE, Inname, (line[3] == ' ') ? &line[4] : &line[3], NR);
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}
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/*
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* Translate - "^[.']tr abcd..."
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*/
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static void nr_tr(unsigned char *line, int brk) {
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unsigned char buf[MAXLINE]; /* temporary buffer */
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int i, j; /* temporary indexes */
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unsigned char nm[4], nm1[4]; /* name buffers */
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unsigned char *s1, *s2; /* temporary string pointers */
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int trin, trout; /* types: 0 = char; 1 = named char */
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unsigned char xbuf[MAXLINE]; /* temporary buffer */
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if (line[3] != ' ') {
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Error(WARN, LINE, " unknown translation", NULL);
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return;
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}
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for (s1 = &line[4]; *s1;) {
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nm[1] = nm[2] = '\0';
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s2 = s1 + 1;
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/*
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* Assemble the input value.
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*/
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if (*s1 == '\\' && (*s2 == '*' || *s2 == '(')) {
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if (*s2 == '(') {
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/*
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* Input is named character -- "\(xx".
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*/
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trin = 1;
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s1 = s2 + 1;
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if ((nm[0] = *s1) != '\0') {
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s1++;
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if ((nm[1] = *s1) != '\0')
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s1++;
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}
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} else {
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/*
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* Input is interpolated string -- "\*x" or "\*(xx".
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*/
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s1 = Asmcode(&s2, nm);
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if (*s1)
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s1++;
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s2 = Findstr(nm, NULL, 0);
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if (*s2 != '\0') {
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if ((strlen((char *)s2) + strlen((char *)s1) + 1)
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>= MAXLINE)
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Error(WARN, LINE, " string too long: ", (char *)nm);
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else {
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(void) sprintf((char *)buf, "%s%s",
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(char *)s2, (char *)s1);
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(void) strcpy((char *)xbuf, (char *)buf);
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s1 = xbuf;
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}
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}
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continue;
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}
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} else {
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/*
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* Input is a simple character.
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*/
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trin = 0;
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if ((nm[0] = *s1) != '\0')
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s1++;
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}
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/*
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* Assemble the output value.
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*/
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assemble_output:
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nm1[1] = nm1[2] = '\0';
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if (*s1 == '\0') {
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/*
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* Supply a space if there is no output character.
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*/
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trout = 0;
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nm1[0] = ' ';
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} else {
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s2 = s1 + 1;
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if (*s1 == '\\' && (*s2 == '(' || *s2 == '*')) {
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if (*s2 == '(') {
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/*
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* The output is a named character -- "\(xx".
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*/
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trout = 1;
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s1 = s2 + 1;
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if ((nm1[0] = *s1) != '\0') {
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s1++;
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if ((nm1[1] = *s1) != '\0')
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s1++;
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}
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} else {
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/*
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* The output is an interpolated string -- * "\*x" or "\*(xx".
|
|
*/
|
|
s1 = Asmcode(&s2, nm1);
|
|
if (*s1)
|
|
s1++;
|
|
s2 = Findstr(nm1, NULL, 0);
|
|
if (*s2 != '\0') {
|
|
/*
|
|
* Interpolate a string value.
|
|
*/
|
|
if ((strlen((char *)s2) + strlen((char *)s1) + 1)
|
|
>= MAXLINE)
|
|
Error(WARN, LINE, " string too long: ",
|
|
(char *)nm);
|
|
else {
|
|
(void) sprintf((char *)buf, "%s%s", (char *)s2,
|
|
(char *)s1);
|
|
(void) strcpy((char *)xbuf, (char *)buf);
|
|
s1 = xbuf;
|
|
}
|
|
}
|
|
goto assemble_output;
|
|
}
|
|
} else {
|
|
trout = 0;
|
|
if ((nm1[0] = *s1) != '0')
|
|
s1++;
|
|
else
|
|
nm1[0] = ' ';
|
|
}
|
|
}
|
|
/*
|
|
* Do the translation.
|
|
*/
|
|
switch (trin) {
|
|
|
|
case 0: /* simple char */
|
|
switch (trout) {
|
|
|
|
case 0: /* to simple char */
|
|
Trtbl[(int)nm[0]] = nm1[0];
|
|
break;
|
|
case 1: /* to named char */
|
|
if ((i = Findchar(nm1, 0, NULL, 0)) < 0
|
|
|| strlen((char *)Schar[i].str) != 1)
|
|
Error(WARN, LINE, " bad named character: ",
|
|
(char *)nm1);
|
|
else
|
|
Trtbl[(int)nm[0]] = *(Schar[i].str);
|
|
break;
|
|
}
|
|
break;
|
|
case 1: /* named char */
|
|
if ((i = Findchar(nm, 0, NULL, 0)) < 0)
|
|
Error(WARN, LINE, " unknown named character: ", (char *)nm);
|
|
else {
|
|
switch (trout) {
|
|
|
|
case 0: /* to simple char */
|
|
Free(&Schar[i].str);
|
|
Schar[i].str = Newstr(nm1);
|
|
Schar[i].len = 1;
|
|
break;
|
|
case 1: /* to named char */
|
|
if ((j = Findchar(nm1, 0, NULL, 0)) < 0)
|
|
Error(WARN, LINE, " unknown named character: ",
|
|
(char *)nm1);
|
|
else
|
|
(void) Findchar(nm, Schar[j].len, Schar[j].str, 1);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Initialization - "^[.']\^b (fh|HF|NH) [01]"
|
|
*
|
|
* fh = first page header status
|
|
* HF = header/footer status
|
|
* NH = initialize number headers
|
|
*/
|
|
|
|
static void nr_Ub(unsigned char *line, int brk) {
|
|
int i; /* temporary index */
|
|
unsigned char *s1, *s2; /* temporary string pointers */
|
|
|
|
if ((s1 = Field(2, line, 0)) == NULL)
|
|
return;
|
|
if ((s2 = Field(3, line, 0)) == NULL)
|
|
i = 0;
|
|
else
|
|
i = atoi((char *)s2);
|
|
if (s1[0] == 'f' && s1[1] == 'h')
|
|
Pass3(NOBREAK, (unsigned char *)"fph", NULL, i);
|
|
else if (s1[0] == 'H' && s1[1] == 'F')
|
|
Hdft = i;
|
|
else if (s1[0] == 'N' && s1[1] == 'H') {
|
|
for (i = 0; i < MAXNHNR; i++)
|
|
Nhnr[i] = 0;
|
|
} else
|
|
Error(WARN, LINE, " unknown initialization", NULL);
|
|
}
|
|
|
|
|
|
/*
|
|
* Character definitions - "^[.']\^c"
|
|
*/
|
|
|
|
static void nr_Uc(unsigned char *line, int brk) {
|
|
unsigned char buf[MAXLINE]; /* temporary buffer */
|
|
int i; /* temporary index */
|
|
unsigned char *s1, *s2, *s3, /* temporary string pointers */
|
|
*s4, *s5;
|
|
|
|
s2 = Field(2, line, 0);
|
|
i = atoi((char *)Field(3, line, 0));
|
|
s4 = Field(4, line, 0);
|
|
if (i < 0 || i > MAXLINE/2 || *s2 == '\0') {
|
|
Error(WARN, LINE, " bad character definition", NULL);
|
|
return;
|
|
}
|
|
if (s4 == NULL)
|
|
s4 = (unsigned char *)"";
|
|
else if (*s4 == '"')
|
|
s4++;
|
|
s1 = buf;
|
|
while ((s5 = (unsigned char *)strchr((char *)s4, '\\')) != NULL) {
|
|
while (s5 > s4)
|
|
*s1++ = *s4++;
|
|
s4 = ++s5;
|
|
if (*s5 == '\\')
|
|
*s1++ = '\\';
|
|
else if (*s5 == 'b')
|
|
*s1++ = '\b';
|
|
if (*s4)
|
|
s4++;
|
|
}
|
|
while ((*s1++ = *s4++))
|
|
;
|
|
if (*s2 == 'h' && *(s2+1) == 'y')
|
|
(void) Findhy(buf, i, 1);
|
|
else
|
|
(void) Findchar(s2, i, buf, 1);
|
|
}
|
|
|
|
|
|
/*
|
|
* Font is OK - "[.']\^f <font_name_character>"
|
|
*/
|
|
|
|
static void nr_Uf(unsigned char *line, int brk) {
|
|
int i; /* temporary index */
|
|
|
|
if (line[3] != '\0' && line[4] != '\0') {
|
|
for (i = 0; Fcode[i].nm; i++) {
|
|
if (line[4] == Fcode[i].nm) {
|
|
Fcode[i].status = '1';
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
Error(WARN, LINE, " unknown font", NULL);
|
|
}
|
|
|
|
|
|
/*
|
|
* Resolutions - "[.']\^r cpi horizontal vertical"
|
|
*/
|
|
|
|
static void nr_Ur(unsigned char *line, int brk) {
|
|
unsigned char buf[MAXLINE]; /* temporary buffer */
|
|
int i, j; /* temporary indexes */
|
|
double tval; /* temporary value */
|
|
|
|
if ((i = atoi((char *)Field(3, line, 0))) <= 0
|
|
|| (j = atoi((char *)Field(4, line, 0))) <= 0) {
|
|
Error(WARN, LINE, " bad cpi resolutions", NULL);
|
|
return;
|
|
}
|
|
tval = (double) (240.0 / (double) i);
|
|
if (Findscale((int)'m', tval, 1) < 0)
|
|
Error(FATAL, LINE, " missing Scal['m']", NULL);
|
|
Scalen = tval;
|
|
if (Scalen <= 0.0) {
|
|
(void) sprintf((char *)buf, " bad Scale['n'] (%f)", Scalen);
|
|
Error(FATAL, LINE, (char *)buf, NULL);
|
|
}
|
|
if (Findscale((int)'n', tval, 1) < 0)
|
|
Error(FATAL, LINE, " missing Scale['n']", NULL);
|
|
Scalev = (double) (240.0 / (double) j);
|
|
if (Scalev <= 0.0) {
|
|
(void) sprintf((char *)buf, " bad Scale['v'] (%f)", Scalen);
|
|
Error(FATAL, LINE, (char *)buf, NULL);
|
|
}
|
|
if (Findscale((int)'v', Scalev, 1) < 0)
|
|
Error(FATAL, LINE, " missing Scale['v']", NULL);
|
|
}
|
|
|
|
|
|
/*
|
|
* Set line number and file name - "^[.']\^# <number> <file>"
|
|
*
|
|
* Lock line number and file name - "^[.']\^= <number> <file>"
|
|
*/
|
|
|
|
static void nr_UL(unsigned char *line, int brk) {
|
|
unsigned char *s1; /* temporary string pointer */
|
|
|
|
if ((s1 = Field(2, line, 0)) != NULL)
|
|
P2il = atoi((char *)s1) - 1;
|
|
else
|
|
P2il = 0;
|
|
Lockil = (line[2] == '#') ? 0 : 1;
|
|
Free(&P2name);
|
|
if (Field(3, line, 1) != NULL) {
|
|
P2name = F;
|
|
F = NULL;
|
|
} else
|
|
P2name = NULL;
|
|
}
|