/
par.c
844 lines (730 loc) · 24.9 KB
/
par.c
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/*********************/
/* par.c */
/* for Par 1.50 */
/* Copyright 1996 by */
/* Adam M. Costello */
/*********************/
/* This is ANSI C code. */
#include "charset.h" /* Also includes "errmsg.h". */
#include "buffer.h" /* Also includes <stddef.h>. */
#include "reformat.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#undef NULL
#define NULL ((void *) 0)
#ifdef DONTFREE
#define free(ptr)
#endif
static const char * const usagemsg =
"\n"
"Options for par:\n"
"\n"
"help print option summary "
" ---------- Boolean parameters: ---------\n"
"version print version number "
" b<body> let non-trailing body chars in\n"
"B<op><set> as <op> is =/+/-, "
" prefix, non-leading in suffix\n"
" replace/augment/diminish "
" c<cap> count all words as capitalized\n"
" body chars by <set> "
" d<div> use indentation as a delimiter\n"
"P<op><set> ditto for protective chars"
" E<Err> send messages to stderr\n"
"Q<op><set> ditto for quote chars "
" e<expel> discard superfluous lines\n"
"-------- Integer parameters: --------"
" f<fit> narrow paragraph for best fit\n"
"h<hang> skip IP's 1st <hang> lines"
" g<guess> preserve wide sentence breaks\n"
" in scan for common affixes"
" i<invis> hide lines inserted by <quote>\n"
"p<prefix> prefix length "
" j<just> justify paragraphs\n"
"r<repeat> if not 0, force bodiless "
" l<last> treat last lines like others\n"
" lines to length <width> "
" q<quote> supply vacant lines between\n"
"s<suffix> suffix length "
" different quote nesting levels\n"
"T<Tab> tab stops every <Tab> cols"
" R<Report> print error for too-long words\n"
"w<width> max output line length "
" t<touch> move suffixes left\n"
"\n"
"See par.doc or par.1 (the man page) for more information.\n"
"\n"
;
/* Structure for recording properties of lines within segments: */
typedef unsigned char lflag_t;
typedef struct lineprop {
short p, s; /* Length of the prefix and suffix of a bodiless */
/* line, or the fallback prelen and suflen */
/* of the IP containing a non-bodiless line. */
lflag_t flags; /* Boolean properties (see below). */
char rc; /* The repeated character of a bodiless line. */
} lineprop;
/* Flags for marking boolean properties: */
static const lflag_t L_BODILESS = 1, /* Bodiless line. */
L_INVIS = 2, /* Invisible line. */
L_FIRST = 4, /* First line of a paragraph. */
L_SUPERF = 8; /* Superfluous line. */
#define isbodiless(prop) ( (prop)->flags & 1)
#define isinvis(prop) (((prop)->flags & 2) != 0)
#define isfirst(prop) (((prop)->flags & 4) != 0)
#define issuperf(prop) (((prop)->flags & 8) != 0)
#define isvacant(prop) (isbodiless(prop) && (prop)->rc == ' ')
static int digtoint(char c)
/* Returns the value represented by the digit c, or -1 if c is not a digit. */
{
const char *p, * const digits = "0123456789";
if (!c) return -1;
p = strchr(digits,c);
return p ? p - digits : -1;
/* We can't simply return c - '0' because this is ANSI C code, */
/* so it has to work for any character set, not just ones which */
/* put the digits together in order. Also, an array that could */
/* be referenced as digtoint[c] might be bad because there's no */
/* upper limit on CHAR_MAX. */
}
static int strtoudec(const char *s, int *pn)
/* Converts the longest prefix of string s consisting of decimal */
/* digits to an integer, which is stored in *pn. Normally returns */
/* 1. If *s is not a digit, then *pn is not changed, but 1 is */
/* still returned. If the integer represented is greater than */
/* 9999, then *pn is not changed and 0 is returned. */
{
int n = 0, d;
d = digtoint(*s);
if (d < 0) return 1;
do {
if (n >= 1000) return 0;
n = 10 * n + d;
d = digtoint(*++s);
} while (d >= 0);
*pn = n;
return 1;
}
static void parsearg(
const char *arg, int *phelp, int *pversion, charset *bodychars, charset
*protectchars, charset *quotechars, int *phang, int *pprefix, int *prepeat,
int *psuffix, int *pTab, int *pwidth, int *pbody, int *pcap, int *pdiv, int
*pErr, int *pexpel, int *pfit, int *pguess, int *pinvis, int *pjust, int
*plast, int *pquote, int *pReport, int *ptouch, errmsg_t errmsg
)
/* Parses the command line argument in *arg, setting the objects pointed to */
/* by the other pointers as appropriate. *phelp and *pversion are boolean */
/* flags indicating whether the help and version options were supplied. */
{
const char *savearg = arg;
charset *chars, *change;
char oc;
int n;
*errmsg = '\0';
if (*arg == '-') ++arg;
if (!strcmp(arg, "help")) {
*phelp = 1;
return;
}
if (!strcmp(arg, "version")) {
*pversion = 1;
return;
}
if (*arg == 'B' || *arg == 'P' || *arg == 'Q' ) {
chars = *arg == 'B' ? bodychars :
*arg == 'P' ? protectchars :
/* *arg == 'Q' */ quotechars ;
++arg;
if (*arg != '=' && *arg != '+' && *arg != '-') goto badarg;
change = parsecharset(arg + 1, errmsg);
if (change) {
if (*arg == '=') csswap(chars,change);
else if (*arg == '+') csadd(chars,change,errmsg);
else /* *arg == '-' */ csremove(chars,change,errmsg);
freecharset(change);
}
return;
}
if (isdigit(*arg)) {
if (!strtoudec(arg, &n)) goto badarg;
if (n <= 8) *pprefix = n;
else *pwidth = n;
}
for (;;) {
while (isdigit(*arg)) ++arg;
oc = *arg;
if (!oc) break;
n = -1;
if (!strtoudec(++arg, &n)) goto badarg;
if ( oc == 'h' || oc == 'p' || oc == 'r'
|| oc == 's' || oc == 'T' || oc == 'w') {
if (oc == 'h') *phang = n >= 0 ? n : 1;
else if (oc == 'p') *pprefix = n;
else if (oc == 'r') *prepeat = n >= 0 ? n : 3;
else if (oc == 's') *psuffix = n;
else if (oc == 'T') *pTab = n >= 0 ? n : 8;
else /* oc == 'w' */ *pwidth = n >= 0 ? n : 79;
}
else {
if (n < 0) n = 1;
if (n > 1) goto badarg;
if (oc == 'b') *pbody = n;
else if (oc == 'c') *pcap = n;
else if (oc == 'd') *pdiv = n;
else if (oc == 'E') *pErr = n;
else if (oc == 'e') *pexpel = n;
else if (oc == 'f') *pfit = n;
else if (oc == 'g') *pguess = n;
else if (oc == 'i') *pinvis = n;
else if (oc == 'j') *pjust = n;
else if (oc == 'l') *plast = n;
else if (oc == 'q') *pquote = n;
else if (oc == 'R') *pReport = n;
else if (oc == 't') *ptouch = n;
else goto badarg;
}
}
return;
badarg:
sprintf(errmsg, "Bad argument: %.*s\n", errmsg_size - 16, savearg);
*phelp = 1;
}
static char **readlines(
lineprop **pprops, const charset *protectchars,
const charset *quotechars, int Tab, int invis, int quote, errmsg_t errmsg
)
/* Reads lines from stdin until EOF, or until a line beginning with a */
/* protective character is encountered (in which case the protective */
/* character is pushed back onto the input stream), or until a blank */
/* line is encountered (in which case the newline is pushed back onto */
/* the input stream). Returns a NULL-terminated array of pointers to */
/* individual lines, stripped of their newline characters. Every NUL */
/* character is stripped, and every white character is changed to a */
/* space unless it is a newline. If quote is 1, vacant lines will be */
/* supplied as described for the q option in par.doc. *pprops is set */
/* to an array of lineprop structures, one for each line, each of whose */
/* flags field is either 0 or L_INVIS (the other fields are 0). If */
/* there are no lines, *pprops is set to NULL. The returned array may */
/* be freed with freelines(). *pprops may be freed with free() if */
/* it's not NULL. On failure, returns NULL and sets *pprops to NULL. */
{
buffer *cbuf = NULL, *lbuf = NULL, *lpbuf = NULL;
int c, empty, blank, firstline, qsonly, oldqsonly = 0, vlnlen, i;
char ch, *ln = NULL, nullchar = '\0', *nullline = NULL, *qpend,
*oldln = NULL, *oldqpend = NULL, *p, *op, *vln = NULL, **lines = NULL;
lineprop vprop = { 0, 0, 0, '\0' }, iprop = { 0, 0, 0, '\0' };
/* oldqsonly, oldln, and oldquend don't really need to be initialized. */
/* They are initialized only to appease compilers that try to be helpful */
/* by issuing warnings about unitialized automatic variables. */
iprop.flags = L_INVIS;
*errmsg = '\0';
*pprops = NULL;
cbuf = newbuffer(sizeof (char), errmsg);
if (*errmsg) goto rlcleanup;
lbuf = newbuffer(sizeof (char *), errmsg);
if (*errmsg) goto rlcleanup;
lpbuf = newbuffer(sizeof (lineprop), errmsg);
if (*errmsg) goto rlcleanup;
for (empty = blank = firstline = 1; ; ) {
c = getchar();
if (c == EOF) break;
if (c == '\n') {
if (blank) {
ungetc(c,stdin);
break;
}
additem(cbuf, &nullchar, errmsg);
if (*errmsg) goto rlcleanup;
ln = copyitems(cbuf,errmsg);
if (*errmsg) goto rlcleanup;
if (quote) {
for (qpend = ln;
*qpend && csmember(*qpend, quotechars);
++qpend);
for (p = qpend; *p == ' ' || csmember(*p, quotechars); ++p);
qsonly = *p == '\0';
while (qpend > ln && qpend[-1] == ' ') --qpend;
if (!firstline) {
for (p = ln, op = oldln;
p < qpend && op < oldqpend && *p == *op;
++p, ++op);
if (!(p == qpend && op == oldqpend))
if (!invis && (oldqsonly || qsonly)) {
if (oldqsonly) {
*op = '\0';
oldqpend = op;
}
if (qsonly) {
*p = '\0';
qpend = p;
}
}
else {
vlnlen = p - ln;
vln = malloc((vlnlen + 1) * sizeof (char));
if (!vln) {
strcpy(errmsg,outofmem);
goto rlcleanup;
}
strncpy(vln,ln,vlnlen);
vln[vlnlen] = '\0';
additem(lbuf, &vln, errmsg);
if (*errmsg) goto rlcleanup;
additem(lpbuf, invis ? &iprop : &vprop, errmsg);
if (*errmsg) goto rlcleanup;
vln = NULL;
}
}
oldln = ln;
oldqpend = qpend;
oldqsonly = qsonly;
}
additem(lbuf, &ln, errmsg);
if (*errmsg) goto rlcleanup;
ln = NULL;
additem(lpbuf, &vprop, errmsg);
if (*errmsg) goto rlcleanup;
clearbuffer(cbuf);
empty = blank = 1;
firstline = 0;
}
else {
if (empty) {
if (csmember((char) c, protectchars)) {
ungetc(c,stdin);
break;
}
empty = 0;
}
if (!c) continue;
if (c == '\t') {
ch = ' ';
for (i = Tab - numitems(cbuf) % Tab; i > 0; --i) {
additem(cbuf, &ch, errmsg);
if (*errmsg) goto rlcleanup;
}
continue;
}
if (isspace(c)) c = ' ';
else blank = 0;
ch = c;
additem(cbuf, &ch, errmsg);
if (*errmsg) goto rlcleanup;
}
}
if (!blank) {
additem(cbuf, &nullchar, errmsg);
if (*errmsg) goto rlcleanup;
ln = copyitems(cbuf,errmsg);
if (*errmsg) goto rlcleanup;
additem(lbuf, &ln, errmsg);
if (*errmsg) goto rlcleanup;
ln = NULL;
additem(lpbuf, &vprop, errmsg);
if (*errmsg) goto rlcleanup;
}
additem(lbuf, &nullline, errmsg);
if (*errmsg) goto rlcleanup;
*pprops = copyitems(lpbuf,errmsg);
if (*errmsg) goto rlcleanup;
lines = copyitems(lbuf,errmsg);
rlcleanup:
if (cbuf) freebuffer(cbuf);
if (lpbuf) freebuffer(lpbuf);
if (lbuf) {
if (!lines)
for (;;) {
lines = nextitem(lbuf);
if (!lines) break;
free(*lines);
}
freebuffer(lbuf);
}
if (ln) free(ln);
if (vln) free(vln);
return lines;
}
static void compresuflen(
const char * const *lines, const char * const *endline,
const charset *bodychars, int body, int pre, int suf, int *ppre, int *psuf
)
/* lines is an array of strings, up to but not including endline. */
/* Writes into *ppre and *psuf the comprelen and comsuflen of the */
/* lines in lines. Assumes that they have already been determined */
/* to be at least pre and suf. endline must not equal lines. */
{
const char *start, *end, *knownstart, * const *line, *p1, *p2, *knownend,
*knownstart2;
start = *lines;
end = knownstart = start + pre;
if (body)
while (*end) ++end;
else
while (*end && !csmember(*end, bodychars)) ++end;
for (line = lines + 1; line < endline; ++line) {
for (p1 = knownstart, p2 = *line + pre;
p1 < end && *p1 == *p2;
++p1, ++p2);
end = p1;
}
if (body)
for (p1 = end; p1 > knownstart; )
if (*--p1 != ' ')
if (csmember(*p1, bodychars))
end = p1;
else
break;
*ppre = end - start;
knownstart = *lines + *ppre;
for (end = knownstart; *end; ++end);
knownend = end - suf;
if (body)
start = knownstart;
else
for (start = knownend;
start > knownstart && !csmember(start[-1], bodychars);
--start);
for (line = lines + 1; line < endline; ++line) {
knownstart2 = *line + *ppre;
for (p2 = knownstart2; *p2; ++p2);
for (p1 = knownend, p2 -= suf;
p1 > start && p2 > knownstart2 && p1[-1] == p2[-1];
--p1, --p2);
start = p1;
}
if (body) {
for (p1 = start;
start < knownend && (*start == ' ' || csmember(*start, bodychars));
++start);
if (start > p1 && start[-1] == ' ') --start;
}
else
while (end - start >= 2 && *start == ' ' && start[1] == ' ') ++start;
*psuf = end - start;
}
static void delimit(
const char * const *lines, const char * const *endline,
const charset *bodychars, int repeat, int body, int div,
int pre, int suf, lineprop *props
)
/* lines is an array of strings, up to but not including */
/* endline. Sets fields in each lineprop in the parallel */
/* array props as appropriate, except for the L_SUPERF flag, */
/* which is never set. It is assumed that the comprelen */
/* and comsuflen of the lines in lines have already been */
/* determined to be at least pre and suf, respectively. */
{
const char * const *line, *end, *p, * const *nextline;
char rc;
lineprop *prop, *nextprop;
int anybodiless = 0, status;
if (endline == lines) return;
if (endline == lines + 1) {
props->flags |= L_FIRST;
props->p = pre, props->s = suf;
return;
}
compresuflen(lines, endline, bodychars, body, pre, suf, &pre, &suf);
line = lines, prop = props;
do {
prop->flags |= L_BODILESS;
prop->p = pre, prop->s = suf;
for (end = *line; *end; ++end);
end -= suf;
p = *line + pre;
rc = p < end ? *p : ' ';
if (rc != ' ' && (!repeat || end - p < repeat))
prop->flags &= ~L_BODILESS;
else
while (p < end) {
if (*p != rc) {
prop->flags &= ~L_BODILESS;
break;
}
++p;
}
if (isbodiless(prop)) {
anybodiless = 1;
prop->rc = rc;
}
++line, ++prop;
} while (line < endline);
if (anybodiless) {
line = lines, prop = props;
do {
if (isbodiless(prop)) {
++line, ++prop;
continue;
}
for (nextline = line + 1, nextprop = prop + 1;
nextline < endline && !isbodiless(nextprop);
++nextline, ++nextprop);
delimit(line,nextline,bodychars,repeat,body,div,pre,suf,prop);
line = nextline, prop = nextprop;
} while (line < endline);
return;
}
if (!div) {
props->flags |= L_FIRST;
return;
}
line = lines, prop = props;
status = ((*lines)[pre] == ' ');
do {
if (((*line)[pre] == ' ') == status)
prop->flags |= L_FIRST;
++line, ++prop;
} while (line < endline);
}
static void marksuperf(
const char * const * lines, const char * const * endline, lineprop *props
)
/* lines points to the first line of a segment, and endline to one */
/* line beyond the last line in the segment. Sets L_SUPERF bits in */
/* the flags fields of the props array whenever the corresponding */
/* line is superfluous. L_BODILESS bits must already be set. */
{
const char * const *line, *p;
lineprop *prop, *mprop, dummy;
int inbody, num, mnum;
for (line = lines, prop = props; line < endline; ++line, ++prop)
if (isvacant(prop))
prop->flags |= L_SUPERF;
inbody = mnum = 0;
mprop = &dummy;
for (line = lines, prop = props; line < endline; ++line, ++prop)
if (isvacant(prop)) {
for (num = 0, p = *line; *p; ++p)
if (*p != ' ') ++num;
if (inbody || num < mnum)
mnum = num, mprop = prop;
inbody = 0;
} else {
if (!inbody) mprop->flags &= ~L_SUPERF;
inbody = 1;
}
}
static void setaffixes(
const char * const *inlines, const char * const *endline,
const lineprop *props, const charset *bodychars,
const charset *quotechars, int hang, int body, int quote,
int *pafp, int *pfs, int *pprefix, int *psuffix
)
/* inlines is an array of strings, up to but not including endline, */
/* representing an IP. inlines and endline must not be equal. props */
/* is the the parallel array of lineprop structures. *pafp and *pfs */
/* are set to the augmented fallback prelen and fallback suflen of the */
/* IP. If either of *pprefix, *psuffix is less than 0, it is set to a */
/* default value as specified in "par.doc". */
{
int numin, pre, suf;
const char *p;
numin = endline - inlines;
if ((*pprefix < 0 || *psuffix < 0) && numin > hang + 1)
compresuflen(inlines + hang, endline, bodychars, body, 0, 0, &pre, &suf);
p = *inlines + props->p;
if (numin == 1 && quote)
while (*p && csmember (*p, quotechars))
++p;
*pafp = p - *inlines;
*pfs = props->s;
if (*pprefix < 0)
*pprefix = numin > hang + 1 ? pre : *pafp;
if (*psuffix < 0)
*psuffix = numin > hang + 1 ? suf : *pfs;
}
static void freelines(char **lines)
/* Frees the elements of lines, and lines itself. */
/* lines is a NULL-terminated array of strings. */
{
char **line;
for (line = lines; *line; ++line)
free(*line);
free(lines);
}
int main(int argc, const char * const *argv)
{
int help = 0, version = 0, hang = 0, prefix = -1, repeat = 0, suffix = -1,
Tab = 1, width = 72, body = 0, cap = 0, div = 0, Err = 0, expel = 0,
fit = 0, guess = 0, invis = 0, just = 0, last = 0, quote = 0, Report = 0,
touch = -1;
int prefixbak, suffixbak, c, sawnonblank, oweblank, n, i, afp, fs;
charset *bodychars = NULL, *protectchars = NULL, *quotechars = NULL;
char *parinit = NULL, *arg, **inlines = NULL, **endline, **firstline, *end,
**nextline, **outlines = NULL, **line;
const char *env, * const whitechars = " \f\n\r\t\v";
errmsg_t errmsg = { '\0' };
lineprop *props = NULL, *firstprop, *nextprop;
FILE *errout;
/* Process environment variables: */
env = getenv("PARBODY");
if (!env) env = "";
bodychars = parsecharset(env,errmsg);
if (*errmsg) {
help = 1;
goto parcleanup;
}
env = getenv("PARPROTECT");
if (!env) env = "";
protectchars = parsecharset(env,errmsg);
if (*errmsg) {
help = 1;
goto parcleanup;
}
env = getenv("PARQUOTE");
if (!env) env = "> ";
quotechars = parsecharset(env,errmsg);
if (*errmsg) {
help = 1;
goto parcleanup;
}
env = getenv("PARINIT");
if (env) {
parinit = malloc((strlen(env) + 1) * sizeof (char));
if (!parinit) {
strcpy(errmsg,outofmem);
goto parcleanup;
}
strcpy(parinit,env);
arg = strtok(parinit,whitechars);
while (arg) {
parsearg(arg, &help, &version, bodychars, protectchars,
quotechars, &hang, &prefix, &repeat, &suffix, &Tab,
&width, &body, &cap, &div, &Err, &expel, &fit, &guess,
&invis, &just, &last, "e, &Report, &touch, errmsg );
if (*errmsg || help || version) goto parcleanup;
arg = strtok(NULL,whitechars);
}
free(parinit);
parinit = NULL;
}
/* Process command line arguments: */
while (*++argv) {
parsearg(*argv, &help, &version, bodychars, protectchars,
quotechars, &hang, &prefix, &repeat, &suffix, &Tab,
&width, &body, &cap, &div, &Err, &expel, &fit, &guess,
&invis, &just, &last, "e, &Report, &touch, errmsg );
if (*errmsg || help || version) goto parcleanup;
}
if (Tab == 0) {
strcpy(errmsg, "<Tab> must not be 0.\n");
goto parcleanup;
}
if (touch < 0) touch = fit || last;
prefixbak = prefix;
suffixbak = suffix;
/* Main loop: */
for (sawnonblank = oweblank = 0; ; ) {
for (;;) {
c = getchar();
if (expel && c == '\n') {
oweblank = sawnonblank;
continue;
}
if (csmember((char) c, protectchars)) {
sawnonblank = 1;
if (oweblank) {
putchar('\n');
oweblank = 0;
}
while (c != '\n' && c != EOF) {
putchar(c);
c = getchar();
}
}
if (c != '\n') break;
putchar(c);
}
if (c == EOF) break;
ungetc(c,stdin);
inlines =
readlines(&props, protectchars, quotechars, Tab, invis, quote, errmsg);
if (*errmsg) goto parcleanup;
for (endline = inlines; *endline; ++endline);
if (endline == inlines) {
free(inlines);
inlines = NULL;
continue;
}
sawnonblank = 1;
if (oweblank) {
putchar('\n');
oweblank = 0;
}
delimit((const char * const *) inlines,
(const char * const *) endline,
bodychars, repeat, body, div, 0, 0, props);
if (expel)
marksuperf((const char * const *) inlines,
(const char * const *) endline, props);
firstline = inlines, firstprop = props;
do {
if (isbodiless(firstprop)) {
if (!isinvis(firstprop) && !(expel && issuperf(firstprop))) {
for (end = *firstline; *end; ++end);
if (!repeat || firstprop->rc == ' ' && !firstprop->s) {
while (end > *firstline && end[-1] == ' ') --end;
*end = '\0';
puts(*firstline);
}
else {
n = width - firstprop->p - firstprop->s;
if (n < 0) {
sprintf(errmsg,impossibility,5);
goto parcleanup;
}
printf("%.*s", firstprop->p, *firstline);
for (i = n; i; --i)
putchar(firstprop->rc);
puts(end - firstprop->s);
}
}
++firstline, ++firstprop;
continue;
}
for (nextline = firstline + 1, nextprop = firstprop + 1;
nextline < endline && !isbodiless(nextprop) && !isfirst(nextprop);
++nextline, ++nextprop);
prefix = prefixbak, suffix = suffixbak;
setaffixes((const char * const *) firstline,
(const char * const *) nextline, firstprop, bodychars,
quotechars, hang, body, quote, &afp, &fs, &prefix, &suffix);
if (width <= prefix + suffix) {
sprintf(errmsg,
"<width> (%d) <= <prefix> (%d) + <suffix> (%d)\n",
width, prefix, suffix);
goto parcleanup;
}
outlines =
reformat((const char * const *) firstline,
(const char * const *) nextline,
afp, fs, hang, prefix, suffix, width, cap,
fit, guess, just, last, Report, touch, errmsg);
if (*errmsg) goto parcleanup;
for (line = outlines; *line; ++line)
puts(*line);
freelines(outlines);
outlines = NULL;
firstline = nextline, firstprop = nextprop;
} while (firstline < endline);
freelines(inlines);
inlines = NULL;
free(props);
props = NULL;
}
parcleanup:
if (bodychars) freecharset(bodychars);
if (protectchars) freecharset(protectchars);
if (quotechars) freecharset(quotechars);
if (parinit) free(parinit);
if (inlines) freelines(inlines);
if (props) free(props);
if (outlines) freelines(outlines);
errout = Err ? stderr : stdout;
if (*errmsg) fprintf(errout, "par error:\n%.*s", errmsg_size, errmsg);
if (version) fputs("par 1.50\n",errout);
if (help) fputs(usagemsg,errout);
return *errmsg ? EXIT_FAILURE : EXIT_SUCCESS;
}