533 lines
12 KiB
C
533 lines
12 KiB
C
/* $NetBSD: fmt.c,v 1.17 2003/08/07 11:13:47 agc Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1980, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#ifndef lint
|
|
__COPYRIGHT("@(#) Copyright (c) 1980, 1993\n\
|
|
The Regents of the University of California. All rights reserved.\n");
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)fmt.c 8.1 (Berkeley) 7/20/93";
|
|
#endif
|
|
__RCSID("$NetBSD: fmt.c,v 1.17 2003/08/07 11:13:47 agc Exp $");
|
|
#endif /* not lint */
|
|
|
|
#include <ctype.h>
|
|
#include <locale.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
/*
|
|
* fmt -- format the concatenation of input files or standard input
|
|
* onto standard output. Designed for use with Mail ~|
|
|
*
|
|
* Syntax : fmt [ goal [ max ] ] [ name ... ]
|
|
* Authors: Kurt Shoens (UCB) 12/7/78;
|
|
* Liz Allen (UMCP) 2/24/83 [Addition of goal length concept].
|
|
*/
|
|
|
|
/* LIZ@UOM 6/18/85 -- Don't need LENGTH any more.
|
|
* #define LENGTH 72 Max line length in output
|
|
*/
|
|
#define NOSTR ((char *) 0) /* Null string pointer for lint */
|
|
|
|
/* LIZ@UOM 6/18/85 --New variables goal_length and max_length */
|
|
#define GOAL_LENGTH 65
|
|
#define MAX_LENGTH 75
|
|
int goal_length; /* Target or goal line length in output */
|
|
int max_length; /* Max line length in output */
|
|
int pfx; /* Current leading blank count */
|
|
int lineno; /* Current input line */
|
|
int mark; /* Last place we saw a head line */
|
|
int center;
|
|
|
|
char *headnames[] = {"To", "Subject", "Cc", 0};
|
|
|
|
static void fmt(FILE *);
|
|
static int ispref(const char *, const char *);
|
|
static void leadin(void);
|
|
static void oflush(void);
|
|
static void pack(const char *, int);
|
|
static void prefix(const char *, int);
|
|
static void setout(void);
|
|
static void split(const char *, int);
|
|
static void tabulate(char *);
|
|
|
|
int ishead(const char *);
|
|
int main(int, char **);
|
|
|
|
/*
|
|
* Drive the whole formatter by managing input files. Also,
|
|
* cause initialization of the output stuff and flush it out
|
|
* at the end.
|
|
*/
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
FILE *fi;
|
|
int errs = 0;
|
|
int number; /* LIZ@UOM 6/18/85 */
|
|
|
|
goal_length = GOAL_LENGTH;
|
|
max_length = MAX_LENGTH;
|
|
setout();
|
|
lineno = 1;
|
|
mark = -10;
|
|
|
|
setlocale(LC_ALL, "");
|
|
|
|
/*
|
|
* LIZ@UOM 6/18/85 -- Check for goal and max length arguments
|
|
*/
|
|
if (argc > 1 && !strcmp(argv[1], "-C")) {
|
|
center++;
|
|
argc--;
|
|
argv++;
|
|
}
|
|
if (argc > 1 && (1 == (sscanf(argv[1], "%d", &number)))) {
|
|
argv++;
|
|
argc--;
|
|
goal_length = abs(number);
|
|
if (argc > 1 && (1 == (sscanf(argv[1], "%d", &number)))) {
|
|
argv++;
|
|
argc--;
|
|
max_length = abs(number);
|
|
}
|
|
}
|
|
if (max_length <= goal_length) {
|
|
fprintf(stderr, "Max length must be greater than %s\n",
|
|
"goal length");
|
|
exit(1);
|
|
}
|
|
if (argc < 2) {
|
|
fmt(stdin);
|
|
oflush();
|
|
exit(0);
|
|
}
|
|
while (--argc) {
|
|
if ((fi = fopen(*++argv, "r")) == NULL) {
|
|
perror(*argv);
|
|
errs++;
|
|
continue;
|
|
}
|
|
fmt(fi);
|
|
fclose(fi);
|
|
}
|
|
oflush();
|
|
exit(errs);
|
|
}
|
|
|
|
/*
|
|
* Read up characters from the passed input file, forming lines,
|
|
* doing ^H processing, expanding tabs, stripping trailing blanks,
|
|
* and sending each line down for analysis.
|
|
*/
|
|
static void
|
|
fmt(FILE *fi)
|
|
{
|
|
char linebuf[BUFSIZ], canonb[BUFSIZ];
|
|
char *cp, *cp2;
|
|
int c, col, add_space;
|
|
|
|
if (center) {
|
|
while (1) {
|
|
cp = fgets(linebuf, BUFSIZ, fi);
|
|
if (!cp)
|
|
return;
|
|
while (*cp && isspace(*cp))
|
|
cp++;
|
|
cp2 = cp + strlen(cp) - 1;
|
|
while (cp2 > cp && isspace(*cp2))
|
|
cp2--;
|
|
if (cp == cp2)
|
|
putchar('\n');
|
|
col = cp2 - cp;
|
|
for (c = 0; c < (goal_length-col)/2; c++)
|
|
putchar(' ');
|
|
while (cp <= cp2)
|
|
putchar(*cp++);
|
|
putchar('\n');
|
|
}
|
|
}
|
|
c = getc(fi);
|
|
while (c != EOF) {
|
|
/*
|
|
* Collect a line, doing ^H processing.
|
|
* Leave tabs for now.
|
|
*/
|
|
cp = linebuf;
|
|
while (c != '\n' && c != EOF && cp-linebuf < BUFSIZ-1) {
|
|
if (c == '\b') {
|
|
if (cp > linebuf)
|
|
cp--;
|
|
c = getc(fi);
|
|
continue;
|
|
}
|
|
if(!(isprint(c) || c == '\t' || c >= 160)) {
|
|
c = getc(fi);
|
|
continue;
|
|
}
|
|
*cp++ = c;
|
|
c = getc(fi);
|
|
}
|
|
*cp = '\0';
|
|
|
|
/*
|
|
* By default, add space after the end of current input
|
|
* (normally end of line)
|
|
*/
|
|
add_space = 1;
|
|
|
|
/*
|
|
* If the input line is longer than linebuf buffer can hold,
|
|
* process the data read so far as if it was a separate line -
|
|
* if there is any whitespace character in the read data,
|
|
* process all the data up to it, otherwise process all.
|
|
*/
|
|
if (c != '\n' && c != EOF && !isspace(c)) {
|
|
/*
|
|
* Find out if any whitespace character has been read.
|
|
*/
|
|
for(cp2 = cp; cp2 >= linebuf
|
|
&& !isspace((unsigned char)*cp2); cp2--);
|
|
|
|
if (cp2 < linebuf) {
|
|
/*
|
|
* ungetc() last read character so that it
|
|
* won't get lost.
|
|
*/
|
|
ungetc(c, fi);
|
|
/*
|
|
* Don't append space on the end in split().
|
|
*/
|
|
add_space = 0;
|
|
} else {
|
|
/*
|
|
* To avoid splitting a word in a middle,
|
|
* ungetc() all characters after last
|
|
* whitespace char.
|
|
*/
|
|
while (!isspace(c) && (cp >= linebuf)) {
|
|
ungetc(c, fi);
|
|
c = *--cp;
|
|
}
|
|
*cp = '\0';
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Expand tabs on the way to canonb.
|
|
*/
|
|
col = 0;
|
|
cp = linebuf;
|
|
cp2 = canonb;
|
|
while ((c = *cp++) != 0) {
|
|
if (c != '\t') {
|
|
col++;
|
|
if (cp2-canonb < BUFSIZ-1)
|
|
*cp2++ = c;
|
|
continue;
|
|
}
|
|
do {
|
|
if (cp2-canonb < BUFSIZ-1)
|
|
*cp2++ = ' ';
|
|
col++;
|
|
} while ((col & 07) != 0);
|
|
}
|
|
|
|
/*
|
|
* Swipe trailing blanks from the line.
|
|
*/
|
|
for (cp2--; cp2 >= canonb && *cp2 == ' '; cp2--)
|
|
;
|
|
*++cp2 = '\0';
|
|
prefix(canonb, add_space);
|
|
if (c != EOF)
|
|
c = getc(fi);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Take a line devoid of tabs and other garbage and determine its
|
|
* blank prefix. If the indent changes, call for a linebreak.
|
|
* If the input line is blank, echo the blank line on the output.
|
|
* Finally, if the line minus the prefix is a mail header, try to keep
|
|
* it on a line by itself.
|
|
*/
|
|
static void
|
|
prefix(const char line[], int add_space)
|
|
{
|
|
const char *cp;
|
|
char **hp;
|
|
int np, h;
|
|
|
|
if (strlen(line) == 0) {
|
|
oflush();
|
|
putchar('\n');
|
|
return;
|
|
}
|
|
for (cp = line; *cp == ' '; cp++)
|
|
;
|
|
np = cp - line;
|
|
|
|
/*
|
|
* The following horrible expression attempts to avoid linebreaks
|
|
* when the indent changes due to a paragraph.
|
|
*/
|
|
if (np != pfx && (np > pfx || abs(pfx-np) > 8))
|
|
oflush();
|
|
if ((h = ishead(cp)) != 0)
|
|
oflush(), mark = lineno;
|
|
if (lineno - mark < 3 && lineno - mark > 0)
|
|
for (hp = &headnames[0]; *hp != (char *) 0; hp++)
|
|
if (ispref(*hp, cp)) {
|
|
h = 1;
|
|
oflush();
|
|
break;
|
|
}
|
|
if (!h && (h = (*cp == '.')))
|
|
oflush();
|
|
pfx = np;
|
|
if (h) {
|
|
pack(cp, strlen(cp));
|
|
oflush();
|
|
} else
|
|
split(cp, add_space);
|
|
lineno++;
|
|
}
|
|
|
|
/*
|
|
* Split up the passed line into output "words" which are
|
|
* maximal strings of non-blanks with the blank separation
|
|
* attached at the end. Pass these words along to the output
|
|
* line packer.
|
|
*/
|
|
static void
|
|
split(const char line[], int add_space)
|
|
{
|
|
const char *cp;
|
|
char *cp2;
|
|
char word[BUFSIZ];
|
|
int wordl; /* LIZ@UOM 6/18/85 */
|
|
|
|
cp = line;
|
|
while (*cp) {
|
|
cp2 = word;
|
|
wordl = 0; /* LIZ@UOM 6/18/85 */
|
|
|
|
/*
|
|
* Collect a 'word,' allowing it to contain escaped white
|
|
* space.
|
|
*/
|
|
while (*cp && *cp != ' ') {
|
|
if (*cp == '\\' && isspace((unsigned char)cp[1]))
|
|
*cp2++ = *cp++;
|
|
*cp2++ = *cp++;
|
|
wordl++;/* LIZ@UOM 6/18/85 */
|
|
}
|
|
|
|
/*
|
|
* Guarantee a space at end of line. Two spaces after end of
|
|
* sentence punctuation.
|
|
*/
|
|
if (*cp == '\0' && add_space) {
|
|
*cp2++ = ' ';
|
|
if (strchr(".:!", cp[-1]))
|
|
*cp2++ = ' ';
|
|
}
|
|
while (*cp == ' ')
|
|
*cp2++ = *cp++;
|
|
*cp2 = '\0';
|
|
/*
|
|
* LIZ@UOM 6/18/85 pack(word);
|
|
*/
|
|
pack(word, wordl);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Output section.
|
|
* Build up line images from the words passed in. Prefix
|
|
* each line with correct number of blanks. The buffer "outbuf"
|
|
* contains the current partial line image, including prefixed blanks.
|
|
* "outp" points to the next available space therein. When outp is NOSTR,
|
|
* there ain't nothing in there yet. At the bottom of this whole mess,
|
|
* leading tabs are reinserted.
|
|
*/
|
|
char outbuf[BUFSIZ]; /* Sandbagged output line image */
|
|
char *outp; /* Pointer in above */
|
|
|
|
/*
|
|
* Initialize the output section.
|
|
*/
|
|
static void
|
|
setout(void)
|
|
{
|
|
outp = NOSTR;
|
|
}
|
|
|
|
/*
|
|
* Pack a word onto the output line. If this is the beginning of
|
|
* the line, push on the appropriately-sized string of blanks first.
|
|
* If the word won't fit on the current line, flush and begin a new
|
|
* line. If the word is too long to fit all by itself on a line,
|
|
* just give it its own and hope for the best.
|
|
*
|
|
* LIZ@UOM 6/18/85 -- If the new word will fit in at less than the
|
|
* goal length, take it. If not, then check to see if the line
|
|
* will be over the max length; if so put the word on the next
|
|
* line. If not, check to see if the line will be closer to the
|
|
* goal length with or without the word and take it or put it on
|
|
* the next line accordingly.
|
|
*/
|
|
|
|
/*
|
|
* LIZ@UOM 6/18/85 -- pass in the length of the word as well
|
|
* pack(word)
|
|
* char word[];
|
|
*/
|
|
static void
|
|
pack(const char word[], int wl)
|
|
{
|
|
const char *cp;
|
|
int s, t;
|
|
|
|
if (outp == NOSTR)
|
|
leadin();
|
|
/*
|
|
* LIZ@UOM 6/18/85 -- change condition to check goal_length; s is the
|
|
* length of the line before the word is added; t is now the length
|
|
* of the line after the word is added
|
|
* t = strlen(word);
|
|
* if (t+s <= LENGTH)
|
|
*/
|
|
s = outp - outbuf;
|
|
t = wl + s;
|
|
if ((t <= goal_length) ||
|
|
((t <= max_length) && (t - goal_length <= goal_length - s))) {
|
|
/*
|
|
* In like flint!
|
|
*/
|
|
for (cp = word; *cp; *outp++ = *cp++);
|
|
return;
|
|
}
|
|
if (s > pfx) {
|
|
oflush();
|
|
leadin();
|
|
}
|
|
for (cp = word; *cp; *outp++ = *cp++);
|
|
}
|
|
|
|
/*
|
|
* If there is anything on the current output line, send it on
|
|
* its way. Set outp to NOSTR to indicate the absence of the current
|
|
* line prefix.
|
|
*/
|
|
static void
|
|
oflush(void)
|
|
{
|
|
if (outp == NOSTR)
|
|
return;
|
|
*outp = '\0';
|
|
tabulate(outbuf);
|
|
outp = NOSTR;
|
|
}
|
|
|
|
/*
|
|
* Take the passed line buffer, insert leading tabs where possible, and
|
|
* output on standard output (finally).
|
|
*/
|
|
static void
|
|
tabulate(char line[])
|
|
{
|
|
char *cp;
|
|
int b, t;
|
|
|
|
/*
|
|
* Toss trailing blanks in the output line.
|
|
*/
|
|
cp = line + strlen(line) - 1;
|
|
while (cp >= line && *cp == ' ')
|
|
cp--;
|
|
*++cp = '\0';
|
|
|
|
/*
|
|
* Count the leading blank space and tabulate.
|
|
*/
|
|
for (cp = line; *cp == ' '; cp++)
|
|
;
|
|
b = cp-line;
|
|
t = b >> 3;
|
|
b &= 07;
|
|
if (t > 0)
|
|
do
|
|
putc('\t', stdout);
|
|
while (--t);
|
|
if (b > 0)
|
|
do
|
|
putc(' ', stdout);
|
|
while (--b);
|
|
while (*cp)
|
|
putc(*cp++, stdout);
|
|
putc('\n', stdout);
|
|
}
|
|
|
|
/*
|
|
* Initialize the output line with the appropriate number of
|
|
* leading blanks.
|
|
*/
|
|
static void
|
|
leadin(void)
|
|
{
|
|
int b;
|
|
char *cp;
|
|
|
|
for (b = 0, cp = outbuf; b < pfx; b++)
|
|
*cp++ = ' ';
|
|
outp = cp;
|
|
}
|
|
|
|
/*
|
|
* Is s1 a prefix of s2??
|
|
*/
|
|
static int
|
|
ispref(const char *s1, const char *s2)
|
|
{
|
|
|
|
while (*s1++ == *s2)
|
|
;
|
|
return (*s1 == '\0');
|
|
}
|