378 lines
8.7 KiB
C
378 lines
8.7 KiB
C
/* io.c: This file contains the i/o routines for the ed line editor */
|
|
/*-
|
|
* Copyright (c) 1993 Andrew Moore, Talke Studio.
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
*
|
|
* $Id: io.c,v 1.5 1996/05/23 06:36:34 tg Exp $
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char * const rcsid = "@(#)io.c,v 1.1 1994/02/01 00:34:41 alm Exp";
|
|
#endif /* not lint */
|
|
|
|
#include "ed.h"
|
|
|
|
|
|
extern int scripted;
|
|
|
|
/* read_file: read a named file/pipe into the buffer; return line count */
|
|
long
|
|
read_file(fn, n)
|
|
char *fn;
|
|
long n;
|
|
{
|
|
FILE *fp;
|
|
long size;
|
|
|
|
|
|
fp = (*fn == '!') ? popen(fn + 1, "r") : fopen(strip_escapes(fn), "r");
|
|
if (fp == NULL) {
|
|
fprintf(stderr, "%s: %s\n", fn, strerror(errno));
|
|
sprintf(errmsg, "cannot open input file");
|
|
return ERR;
|
|
} else if ((size = read_stream(fp, n)) < 0)
|
|
return ERR;
|
|
else if (((*fn == '!') ? pclose(fp) : fclose(fp)) < 0) {
|
|
fprintf(stderr, "%s: %s\n", fn, strerror(errno));
|
|
sprintf(errmsg, "cannot close input file");
|
|
return ERR;
|
|
}
|
|
fprintf(stdout, !scripted ? "%lu\n" : "", size);
|
|
return current_addr - n;
|
|
}
|
|
|
|
|
|
extern int des;
|
|
|
|
char *sbuf; /* file i/o buffer */
|
|
int sbufsz; /* file i/o buffer size */
|
|
int newline_added; /* if set, newline appended to input file */
|
|
|
|
/* read_stream: read a stream into the editor buffer; return status */
|
|
long
|
|
read_stream(fp, n)
|
|
FILE *fp;
|
|
long n;
|
|
{
|
|
line_t *lp = get_addressed_line_node(n);
|
|
undo_t *up = NULL;
|
|
unsigned long size = 0;
|
|
int o_newline_added = newline_added;
|
|
int o_isbinary = isbinary;
|
|
int appended = (n == addr_last);
|
|
int len;
|
|
|
|
isbinary = newline_added = 0;
|
|
if (des)
|
|
init_des_cipher();
|
|
for (current_addr = n; (len = get_stream_line(fp)) > 0; size += len) {
|
|
SPL1();
|
|
if (put_sbuf_line(sbuf) == NULL) {
|
|
SPL0();
|
|
return ERR;
|
|
}
|
|
lp = lp->q_forw;
|
|
if (up)
|
|
up->t = lp;
|
|
else if ((up = push_undo_stack(UADD, current_addr,
|
|
current_addr)) == NULL) {
|
|
SPL0();
|
|
return ERR;
|
|
}
|
|
SPL0();
|
|
}
|
|
if (len < 0)
|
|
return ERR;
|
|
if (appended && size && o_isbinary && o_newline_added)
|
|
fputs("newline inserted\n", stderr);
|
|
else if (newline_added && (!appended || (!isbinary && !o_isbinary)))
|
|
fputs("newline appended\n", stderr);
|
|
if (isbinary && newline_added && !appended)
|
|
size += 1;
|
|
if (!size)
|
|
newline_added = 1;
|
|
newline_added = appended ? newline_added : o_newline_added;
|
|
isbinary = isbinary | o_isbinary;
|
|
if (des)
|
|
size += 8 - size % 8; /* adjust DES size */
|
|
return size;
|
|
}
|
|
|
|
|
|
/* get_stream_line: read a line of text from a stream; return line length */
|
|
int
|
|
get_stream_line(fp)
|
|
FILE *fp;
|
|
{
|
|
register int c;
|
|
register int i = 0;
|
|
|
|
while (((c = des ? get_des_char(fp) : getc(fp)) != EOF || (!feof(fp) &&
|
|
!ferror(fp))) && c != '\n') {
|
|
REALLOC(sbuf, sbufsz, i + 1, ERR);
|
|
if (!(sbuf[i++] = c))
|
|
isbinary = 1;
|
|
}
|
|
REALLOC(sbuf, sbufsz, i + 2, ERR);
|
|
if (c == '\n')
|
|
sbuf[i++] = c;
|
|
else if (ferror(fp)) {
|
|
fprintf(stderr, "%s\n", strerror(errno));
|
|
sprintf(errmsg, "cannot read input file");
|
|
return ERR;
|
|
} else if (i) {
|
|
sbuf[i++] = '\n';
|
|
newline_added = 1;
|
|
}
|
|
sbuf[i] = '\0';
|
|
return (isbinary && newline_added && i) ? --i : i;
|
|
}
|
|
|
|
|
|
/* write_file: write a range of lines to a named file/pipe; return line count */
|
|
long
|
|
write_file(fn, mode, n, m)
|
|
char *fn;
|
|
char *mode;
|
|
long n;
|
|
long m;
|
|
{
|
|
FILE *fp;
|
|
long size;
|
|
|
|
fp = (*fn == '!') ? popen(fn+1, "w") : fopen(strip_escapes(fn), mode);
|
|
if (fp == NULL) {
|
|
fprintf(stderr, "%s: %s\n", fn, strerror(errno));
|
|
sprintf(errmsg, "cannot open output file");
|
|
return ERR;
|
|
} else if ((size = write_stream(fp, n, m)) < 0)
|
|
return ERR;
|
|
else if (((*fn == '!') ? pclose(fp) : fclose(fp)) < 0) {
|
|
fprintf(stderr, "%s: %s\n", fn, strerror(errno));
|
|
sprintf(errmsg, "cannot close output file");
|
|
return ERR;
|
|
}
|
|
fprintf(stdout, !scripted ? "%lu\n" : "", size);
|
|
return n ? m - n + 1 : 0;
|
|
}
|
|
|
|
|
|
/* write_stream: write a range of lines to a stream; return status */
|
|
long
|
|
write_stream(fp, n, m)
|
|
FILE *fp;
|
|
long n;
|
|
long m;
|
|
{
|
|
line_t *lp = get_addressed_line_node(n);
|
|
unsigned long size = 0;
|
|
char *s;
|
|
int len;
|
|
|
|
if (des)
|
|
init_des_cipher();
|
|
for (; n && n <= m; n++, lp = lp->q_forw) {
|
|
if ((s = get_sbuf_line(lp)) == NULL)
|
|
return ERR;
|
|
len = lp->len;
|
|
if (n != addr_last || !isbinary || !newline_added)
|
|
s[len++] = '\n';
|
|
if (put_stream_line(fp, s, len) < 0)
|
|
return ERR;
|
|
size += len;
|
|
}
|
|
if (des) {
|
|
flush_des_file(fp); /* flush buffer */
|
|
size += 8 - size % 8; /* adjust DES size */
|
|
}
|
|
return size;
|
|
}
|
|
|
|
|
|
/* put_stream_line: write a line of text to a stream; return status */
|
|
int
|
|
put_stream_line(fp, s, len)
|
|
FILE *fp;
|
|
char *s;
|
|
int len;
|
|
{
|
|
while (len--)
|
|
if ((des ? put_des_char(*s++, fp) : fputc(*s++, fp)) < 0) {
|
|
fprintf(stderr, "%s\n", strerror(errno));
|
|
sprintf(errmsg, "cannot write file");
|
|
return ERR;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* get_extended_line: get a an extended line from stdin */
|
|
char *
|
|
get_extended_line(sizep, nonl)
|
|
int *sizep;
|
|
int nonl;
|
|
{
|
|
static char *cvbuf = NULL; /* buffer */
|
|
static int cvbufsz = 0; /* buffer size */
|
|
|
|
int l, n;
|
|
char *t = ibufp;
|
|
|
|
while (*t++ != '\n')
|
|
;
|
|
if ((l = t - ibufp) < 2 || !has_trailing_escape(ibufp, ibufp + l - 1)) {
|
|
*sizep = l;
|
|
return ibufp;
|
|
}
|
|
*sizep = -1;
|
|
REALLOC(cvbuf, cvbufsz, l, NULL);
|
|
memcpy(cvbuf, ibufp, l);
|
|
*(cvbuf + --l - 1) = '\n'; /* strip trailing esc */
|
|
if (nonl) l--; /* strip newline */
|
|
for (;;) {
|
|
if ((n = get_tty_line()) < 0)
|
|
return NULL;
|
|
else if (n == 0 || ibuf[n - 1] != '\n') {
|
|
sprintf(errmsg, "unexpected end-of-file");
|
|
return NULL;
|
|
}
|
|
REALLOC(cvbuf, cvbufsz, l + n, NULL);
|
|
memcpy(cvbuf + l, ibuf, n);
|
|
l += n;
|
|
if (n < 2 || !has_trailing_escape(cvbuf, cvbuf + l - 1))
|
|
break;
|
|
*(cvbuf + --l - 1) = '\n'; /* strip trailing esc */
|
|
if (nonl) l--; /* strip newline */
|
|
}
|
|
REALLOC(cvbuf, cvbufsz, l + 1, NULL);
|
|
cvbuf[l] = '\0';
|
|
*sizep = l;
|
|
return cvbuf;
|
|
}
|
|
|
|
|
|
/* get_tty_line: read a line of text from stdin; return line length */
|
|
int
|
|
get_tty_line()
|
|
{
|
|
register int oi = 0;
|
|
register int i = 0;
|
|
int c;
|
|
|
|
for (;;)
|
|
switch (c = getchar()) {
|
|
default:
|
|
oi = 0;
|
|
REALLOC(ibuf, ibufsz, i + 2, ERR);
|
|
if (!(ibuf[i++] = c)) isbinary = 1;
|
|
if (c != '\n')
|
|
continue;
|
|
lineno++;
|
|
ibuf[i] = '\0';
|
|
ibufp = ibuf;
|
|
return i;
|
|
case EOF:
|
|
if (ferror(stdin)) {
|
|
fprintf(stderr, "stdin: %s\n", strerror(errno));
|
|
sprintf(errmsg, "cannot read stdin");
|
|
clearerr(stdin);
|
|
ibufp = NULL;
|
|
return ERR;
|
|
} else {
|
|
clearerr(stdin);
|
|
if (i != oi) {
|
|
oi = i;
|
|
continue;
|
|
} else if (i)
|
|
ibuf[i] = '\0';
|
|
ibufp = ibuf;
|
|
return i;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
#define ESCAPES "\a\b\f\n\r\t\v\\"
|
|
#define ESCCHARS "abfnrtv\\"
|
|
|
|
extern int rows;
|
|
extern int cols;
|
|
|
|
/* put_tty_line: print text to stdout */
|
|
int
|
|
put_tty_line(s, l, n, gflag)
|
|
char *s;
|
|
int l;
|
|
long n;
|
|
int gflag;
|
|
{
|
|
int col = 0;
|
|
int lc = 0;
|
|
char *cp;
|
|
|
|
if (gflag & GNP) {
|
|
printf("%ld\t", n);
|
|
col = 8;
|
|
}
|
|
for (; l--; s++) {
|
|
if ((gflag & GLS) && ++col > cols) {
|
|
fputs("\\\n", stdout);
|
|
col = 1;
|
|
#ifndef BACKWARDS
|
|
if (!scripted && !isglobal && ++lc > rows) {
|
|
lc = 0;
|
|
fputs("Press <RETURN> to continue... ", stdout);
|
|
fflush(stdout);
|
|
if (get_tty_line() < 0)
|
|
return ERR;
|
|
}
|
|
#endif
|
|
}
|
|
if (gflag & GLS) {
|
|
if (31 < *s && *s < 127 && *s != '\\')
|
|
putchar(*s);
|
|
else {
|
|
putchar('\\');
|
|
col++;
|
|
if (*s && (cp = strchr(ESCAPES, *s)) != NULL)
|
|
putchar(ESCCHARS[cp - ESCAPES]);
|
|
else {
|
|
putchar((((unsigned char) *s & 0300) >> 6) + '0');
|
|
putchar((((unsigned char) *s & 070) >> 3) + '0');
|
|
putchar(((unsigned char) *s & 07) + '0');
|
|
col += 2;
|
|
}
|
|
}
|
|
|
|
} else
|
|
putchar(*s);
|
|
}
|
|
#ifndef BACKWARDS
|
|
if (gflag & GLS)
|
|
putchar('$');
|
|
#endif
|
|
putchar('\n');
|
|
return 0;
|
|
}
|