615 lines
13 KiB
C
615 lines
13 KiB
C
/*
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* pass3.c - cawf(1) pass 3 function
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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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void
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Pass3(len, word, sarg, narg)
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int len; /* length (negative is special) */
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unsigned char *word; /* word */
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unsigned char *sarg; /* string argument */
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int narg; /* numeric argument */
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{
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int addto; /* spaces to add to all words */
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int i, j, k; /* temporary index */
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unsigned char msg[MAXLINE]; /* message buffer */
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int n; /* temporary number */
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unsigned char *s1; /* temporary string pointer */
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int sp = 0; /* no-break spacing switch */
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int sp_Outll; /* sp-saved Outll */
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char sp_Outln; /* sp-saved Outln[0] */
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int sp_Outlx; /* sp-saved Outlx */
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int sp_Padx; /* sp-saved Padx */
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int sp_Tind; /* sp-saved Tind */
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int wl; /* real word length */
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int xsp; /* extra spaces to add */
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int vsp; /* vertical spacing status */
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vsp = 0;
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if (word != NULL)
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wl = strlen((char *)word);
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/*
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* If not a special command, process a word.
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*/
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if (len >= 0 && Outll < 0) {
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/*
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* Enter first word.
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*/
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(void) strcpy((char *)Outln, (char *)word);
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Outll = len;
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Outlx = wl;
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Padx = 0;
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} else if (len >= 0
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&& (Outll+Contlen+len+narg) <= (LL-Pgoff-Ind-Tind)) {
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/*
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* The word fits, so enter it.
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*/
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if ((Contlen + len) > 0) {
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line_too_big:
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if ((Outlx + Contlen + wl) >= MAXOLL) {
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Error3(len, (char *)word, (char *)sarg, narg,
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"output line too big");
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return;
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} else {
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if (Contlen > 0 && Cont != NULL) {
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if (Contlen == 1 && *Cont == ' ') {
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Padchar[Padx++] = Outlx;
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Outln[Outlx++] = ' ';
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} else {
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(void) strcpy((char *)&Outln[Outlx],
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(char *)Cont);
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Outlx += Contlen;
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}
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}
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if (len > 0) {
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(void) strcpy((char *)&Outln[Outlx],
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(char *)word);
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Outlx += wl;
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}
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}
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}
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Outll += Contlen + len;
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} else if (len == NOBREAK || len == MESSAGE) {
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/*
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* Do nothing (equivalent to break)
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*/
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} else if (len == DOBREAK && strcmp((char *)word, "need") == 0
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&& (Nxtln + narg) < (Pglen + 1 - Botmarg)) {
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/*
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* Do nothing, because there is room on the page.
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*/
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} else if (len == DOBREAK && strcmp((char *)word, "toindent") == 0
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&& (Ind + Tind + Outll) < Ind) {
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/*
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* Move to indent position with line - there is room.
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*/
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n = Ind - (Ind + Tind +Outll);
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Outll += n;
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if ((Outlx + n) >= MAXOLL)
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goto line_too_big;
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for (i = n; i; i--)
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Outln[Outlx++] = ' ';
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Padx = 0;
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Free(&Cont);
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Contlen = 0;
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} else if (Outll >= 0
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|| (len == DOBREAK && strcmp((char *)word, "need") == 0)) {
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/*
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* A non-empty line or a "need" forces output.
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*/
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vsp = 0;
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print_line:
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if (Nxtln == 1) {
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/*
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* We're at the top of the page, so issue the header.
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*/
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if (Thispg > 1)
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Charput((int)'\f');
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for (i = (Topmarg - 1)/2; i > 0; i--) {
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Charput((int)'\n');
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Nxtln++;
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}
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/*
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* Print the page header, as required.
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*/
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if (Fph || Thispg > 1) {
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i = LenprtHF(Hdc, Thispg, 0)
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+ LenprtHF(Hdl, Thispg, 0)
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+ LenprtHF(Hdr, Thispg, 0) + 2;
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j = (LL - i - Pgoff) / 2 + 1;
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n = LL - Pgoff - i - j + 2;
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for (k = 0; k < Pgoff; k++)
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Charput((int)' ');
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if (Hdl)
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LenprtHF(Hdl, Thispg, 1);
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while (j-- > 0)
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Charput((int)' ');
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if (Hdc)
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LenprtHF(Hdc, Thispg, 1);
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while (n-- > 0)
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Charput((int)' ');
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if (Hdr)
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LenprtHF(Hdr, Thispg, 1);
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Charput((int)'\n');
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} else
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Charput((int)'\n');
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Nxtln++;
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while(Nxtln <= Topmarg) {
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Charput((int)'\n');
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Nxtln++;
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}
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}
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/*
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* Add a trailing hyphen, if mecessary.
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*/
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if (vsp == 0 && Eollen > 0 && Eol != NULL) {
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i = strlen((char *)Eol);
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if ((Outlx + i) >= MAXOLL)
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goto line_too_big;
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(void) strcpy((char *)&Outln[Outlx], (char *)Eol);
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Outlx += i;
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Outll += Eollen;
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}
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/*
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* Trim trailing spaces from the output line.
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*/
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while (Outlx > 0) {
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if (Outln[Outlx - 1] != ' ')
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break;
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if (Padx > 0 && (Outlx - 1) == Padchar[Padx - 1])
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Padx--;
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Outlx--;
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Outln[Outlx] = '\0';
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Outll--;
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}
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if (Outlx == 0)
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Charput((int)'\n');
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else if (len == DOBREAK && strcmp((char *)word, "center") == 0)
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{
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/*
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* Center the output line.
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*/
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i = (LL - Pgoff - Outll) / 2;
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if (i < 0)
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i = 0;
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for (j = (Pgoff + Ind + Tind + i); j; j--)
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Charput((int)' ');
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Stringput(Outln);
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Charput((int)'\n');
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} else if (Adj == LEFTADJ
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|| (Adj == BOTHADJ && (len < 0 || Padx == 0))) {
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/*
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* No right margin adjustment - disabled, inappropriate
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* (line ended by break) or impossible.
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*/
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for (i = 0; i < (Pgoff + Ind + Tind); i++)
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Charput((int)' ');
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Stringput(Outln);
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Charput((int)'\n');
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} else if (Adj == BOTHADJ) {
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/*
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* Adjust right margin.
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*/
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for (i = 0; i < (Pgoff + Ind + Tind); i++)
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Charput((int)' ');
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i = LL - (Pgoff + Ind + Tind);
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j = i - Outll;
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addto = Padx ? (j / Padx) : 0;
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xsp = j - (Padx * addto);
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for (i = 0, s1 = Outln; i < Padx; i++) {
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while (*s1 && (s1 - Outln) <= Padchar[i])
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Charput((int)*s1++);
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if (*s1 == '\0')
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break;
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j = addto;
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if (Padfrom == PADLEFT) {
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if (i < xsp)
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j++;
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} else if (i >= (Padx - xsp))
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j++;
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while (j-- > 0)
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Charput((int)' ');
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}
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while (*s1)
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Charput((int)*s1++);
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Charput((int)'\n');
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Padfrom = (Padfrom == PADLEFT) ? PADRIGHT : PADLEFT;
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}
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/*
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* End of line housekeeping
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*/
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Nxtln++;
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Outll = -1;
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Outlx = 0;
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Padx = 0;
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Tind = 0;
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Nospmode = 0;
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if (vsp == 0 && len == DOBREAK
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&& strcmp((char *)word, "need") == 0) {
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/*
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* Break caused by "need" - satisfy it.
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*/
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while (Nxtln < (Pglen + 1 - Botmarg)) {
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Charput((int)'\n');
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Nxtln++;
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}
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}
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if (Nxtln >= (Pglen + 1 - Botmarg)) {
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/*
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* Footer required
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*/
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for (i = (Botmarg - 1)/2; i > 0; i--) {
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Charput((int)'\n');
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Nxtln++;
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}
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i = LenprtHF(Ftl, Thispg, 0) + LenprtHF(Ftc, Thispg, 0)
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+ LenprtHF(Ftr, Thispg, 0) + 2;
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j = (LL - i - Pgoff) / 2 + 1;
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n = LL - Pgoff - i - j + 2;
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for (k = 0; k < Pgoff; k++)
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Charput((int)' ');
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if (Ftl)
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LenprtHF(Ftl, Thispg, 1);
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while (j-- > 0)
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Charput((int)' ');
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if (Ftc)
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LenprtHF(Ftc, Thispg, 1);
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while (n-- > 0)
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Charput((int)' ');
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if (Ftr)
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LenprtHF(Ftr, Thispg, 1);
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Charput((int)'\n');
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Nxtln++;
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/*
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* The last blank line on the page is suppressed to assist
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* printers that can't look ahead to the following FF.
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*/
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while (Nxtln < Pglen) {
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Charput((int)'\n');
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Nxtln++;
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}
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Nxtln = 1;
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Thispg++;
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Nospmode = 1;
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Padfrom = PADRIGHT;
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}
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/*
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* Initiate any extra vertical spacing.
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*/
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if (++vsp < Vspace)
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goto print_line;
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/*
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* Save any input word that might have forced output.
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*/
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if (len >= 0) {
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(void) strcpy((char *)Outln, (char *)word);
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Outll = len;
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Outlx = wl;
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Padx = 0;
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}
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}
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/*
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* A break causes padding reversal.
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*/
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if (len == DOBREAK)
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Padfrom = PADRIGHT;
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if (len >= 0 || strcmp((char *)word, "nohyphen") == 0) {
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/*
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* Reset continuation and hyphenation.
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*/
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if (Contlen != 1 || Cont[0] != ' ') {
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Free(&Cont);
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Cont = Newstr((unsigned char *)" ");
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Contlen = 1;
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}
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if (Eollen > 0) {
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Free(&Eol);
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Eollen = 0;
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}
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return;
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}
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/*
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* Now post-process any special commands.
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*/
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if (len == MESSAGE) {
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Error3(len, (char *)word, (char *)sarg, narg, NULL);
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return;
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}
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switch (*word) {
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case 'b': /* both */
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/*
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* Adjust on both margins.
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*/
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Adj = BOTHADJ;
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return;
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case 'c': /* center */
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return;
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case 'e': /* errsto */
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/*
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* "errsto" comes from awf.
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*/
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return;
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case 'f': /* flush and fph */
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if (word[1] == 'l')
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return;
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else if (word[1] == 'p') {
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/*
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* First page header status
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*/
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Fph = narg;
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return;
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}
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break;
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case 'g': /* gap */
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/*
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* Increase word gap. (Space is not paddable.)
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*/
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if (Outll >= 0) {
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if ((Outlx + narg - 1) >= MAXOLL)
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goto line_too_big;
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for (i = 0; i < (narg - 1); i++) {
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Outln[Outlx++] = ' ';
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Outll++;
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}
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}
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return;
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case 'h': /* hyphen */
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/*
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* Set discretionary hyphen.
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*/
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Free(&Cont);
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Contlen = 0;
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Free(&Eol);
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Eol = (sarg != NULL) ? Newstr(sarg) : NULL;
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Eollen = narg;
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return;
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case 'i': /* indent */
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/*
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* Set indentation.
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*/
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Ind = narg;
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return;
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case 'l': /* left or linelen */
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if (word[1] == 'e') {
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/*
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* Adjust on left margin.
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*/
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Adj = LEFTADJ;
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return;
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} else if (word[1] == 'i') {
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/*
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* Set line length.
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*/
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LL = narg;
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return;
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}
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break;
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case 'n': /* need or nospace */
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if (word[1] == 'e')
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return; /* need */
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else if (word[1] == 'o') {
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/*
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* Set no space mode.
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*/
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Nospmode = 1;
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return;
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}
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break;
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case 'p': /* pagelen or pageoffset */
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if (strncmp((char *)&word[1], "age", 3) != 0)
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break;
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if (word[4] == 'l') {
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/*
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* Set page length.
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*/
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Pglen = narg;
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return;
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} else if (word[4] == 'o') {
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/*
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* Set page offset.
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*/
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Pgoff = narg;
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return;
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}
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break;
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case 's': /* space */
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if (sp) {
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/*
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* Restore values after NOBREAK spacing ("^'sp").
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*/
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Outlx = sp_Outlx;
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Outln[0] = sp_Outln;
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Padx = sp_Padx;
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Outll = sp_Outll;
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Tind = sp_Tind;
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return;
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}
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if (Nospmode == 0) {
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if (len == NOBREAK) {
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/*
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* Set up for NOBREAK spacing.
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*/
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sp_Outlx = Outlx;
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sp_Outln = Outln[0];
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sp_Padx = Padx;
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sp_Outll = Outll;
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sp_Tind = Tind;
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vsp = Vspace + 1;
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sp = 1;
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}
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/*
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* Generate a blank line.
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*/
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Outlx = 0;
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Outln[0] = '\0';
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Padx = 0;
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Outll = LL - 1;
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if (sp)
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goto print_line;
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}
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return;
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case 't': /* tabto, tempindent, or
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* toindent */
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if (word[1] == 'a') {
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/*
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* Move to TAB stop.
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*/
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if (Outll < 0)
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Outll = 0;
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if ((n = narg - Outll) > 0) {
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if ((Outlx + n) >= MAXOLL)
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goto line_too_big;
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Outll += n;
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for (i = n; i > 0; i--)
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Outln[Outlx++] = ' ';
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Free(&Cont);
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Contlen = 0;
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Padx = 0;
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}
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return;
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} else if (word[1] == 'e') {
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/*
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* Set temporary indentation.
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*/
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if (*sarg == '\0' && narg >= 0)
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Tind = narg - Ind;
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else
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Tind = ((Ind + narg) >= 0) ? narg : -Ind;
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return;
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} else if (word[1] == 'o')
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return; /* toindent */
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break;
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case 'u': /* userhyphen */
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/*
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* Set line length.
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*/
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Free(&Cont);
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Free(&Eol);
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Contlen = Eollen = narg;
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Cont = (sarg == NULL) ? NULL : Newstr(sarg);
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Eol = (sarg == NULL) ? NULL : Newstr(sarg);
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return;
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case 'v': /* vspace */
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/*
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* Set vertical spacing.
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*/
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Vspace = (narg == 0) ? 1 : narg;
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return;
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case 'y': /* yesspace */
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/*
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* Set space mode.
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*/
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Nospmode = 0;
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return;
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} /* end of switch(*word) */
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/*
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* Locate header and footer defintions.
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*/
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if (regexec(Pat[14].pat, word)) {
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if (strcmp((char *)word, "LH") == 0) {
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/*
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* Left header
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*/
|
|
Free(&Hdl);
|
|
if (sarg != NULL)
|
|
Hdl = Newstr(sarg);
|
|
return;
|
|
}
|
|
if (strcmp((char *)word, "CH") == 0) {
|
|
/*
|
|
* Center header
|
|
*/
|
|
Free(&Hdc);
|
|
if (sarg != NULL)
|
|
Hdc = Newstr(sarg);
|
|
return;
|
|
}
|
|
if (strcmp((char *)word, "RH") == 0) {
|
|
/*
|
|
* Right header
|
|
*/
|
|
Free(&Hdr);
|
|
if (sarg != NULL)
|
|
Hdr = Newstr(sarg);
|
|
return;
|
|
}
|
|
if (strcmp((char *)word, "LF") == 0) {
|
|
/*
|
|
* Left footer
|
|
*/
|
|
Free(&Ftl);
|
|
if (sarg != NULL)
|
|
Ftl = Newstr(sarg);
|
|
return;
|
|
}
|
|
if (strcmp((char *)word, "CF") == 0) {
|
|
/*
|
|
* Center footer
|
|
*/
|
|
Free(&Ftc);
|
|
if (sarg != NULL)
|
|
Ftc = Newstr(sarg);
|
|
return;
|
|
}
|
|
if (strcmp((char *)word, "RF") == 0) {
|
|
/*
|
|
* Right footer
|
|
*/
|
|
Free(&Ftr);
|
|
if (sarg != NULL)
|
|
Ftr = Newstr(sarg);
|
|
return;
|
|
}
|
|
}
|
|
/*
|
|
* Error on unknown arguments
|
|
*/
|
|
Error3(len, (char *)word, (char *)sarg, narg, "unknown request");
|
|
}
|