[unix-history] / bin / ed / io.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.
 */

#ifndef lint
static char *rcsid = "@(#)$Id: io.c,v 1.3 1993/12/14 16:19:56 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(stderr, !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(stderr, !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('$');
#endif
	putchar('\n');
	return 0;
}
Commit	Line	Data
84ee7b23 AM	1	/* io.c: This file contains the i/o routines for the ed line editor */
	2	/*-
	3	* Copyright (c) 1993 Andrew Moore, Talke Studio.
	4	* All rights reserved.
	5	*
	6	* Redistribution and use in source and binary forms, with or without
	7	* modification, are permitted provided that the following conditions
	8	* are met:
	9	* 1. Redistributions of source code must retain the above copyright
	10	* notice, this list of conditions and the following disclaimer.
	11	* 2. Redistributions in binary form must reproduce the above copyright
	12	* notice, this list of conditions and the following disclaimer in the
	13	* documentation and/or other materials provided with the distribution.
	14	*
	15	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
	16	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	17	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	18	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
	19	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	20	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	21	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	22	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	23	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	24	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	25	* SUCH DAMAGE.
	26	*/
	27
	28	#ifndef lint
	29	static char *rcsid = "@(#)$Id: io.c,v 1.3 1993/12/14 16:19:56 alm Exp $";
	30	#endif /* not lint */
	31
	32	#include "ed.h"
	33
	34
	35	extern int scripted;
	36
	37	/* read_file: read a named file/pipe into the buffer; return line count */
	38	long
	39	read_file(fn, n)
	40	char *fn;
	41	long n;
	42	{
	43	FILE *fp;
	44	long size;
	45
	46
	47	fp = (*fn == '!') ? popen(fn + 1, "r") : fopen(strip_escapes(fn), "r");
	48	if (fp == NULL) {
	49	fprintf(stderr, "%s: %s\n", fn, strerror(errno));
	50	sprintf(errmsg, "cannot open input file");
	51	return ERR;
	52	} else if ((size = read_stream(fp, n)) < 0)
	53	return ERR;
	54	else if (((*fn == '!') ? pclose(fp) : fclose(fp)) < 0) {
	55	fprintf(stderr, "%s: %s\n", fn, strerror(errno));
	56	sprintf(errmsg, "cannot close input file");
	57	return ERR;
	58	}
	59	fprintf(stderr, !scripted ? "%lu\n" : "", size);
	60	return current_addr - n;
	61	}
	62
	63
	64	extern int des;
65
66	char sbuf; / file i/o buffer */
67	int sbufsz; /* file i/o buffer size */
68	int newline_added; /* if set, newline appended to input file */
69
70	/* read_stream: read a stream into the editor buffer; return status */
71	long
72	read_stream(fp, n)
73	FILE *fp;
74	long n;
75	{
76	line_t *lp = get_addressed_line_node(n);
77	undo_t *up = NULL;
78	unsigned long size = 0;
79	int o_newline_added = newline_added;
80	int o_isbinary = isbinary;
81	int appended = (n == addr_last);
82	int len;
83
84	isbinary = newline_added = 0;
85	if (des)
86	init_des_cipher();
87	for (current_addr = n; (len = get_stream_line(fp)) > 0; size += len) {
88	SPL1();
89	if (put_sbuf_line(sbuf) == NULL) {
90	SPL0();
91	return ERR;
92	}
93	lp = lp->q_forw;
94	if (up)
95	up->t = lp;
96	else if ((up = push_undo_stack(UADD, current_addr,
97	current_addr)) == NULL) {
98	SPL0();
99	return ERR;
100	}
101	SPL0();
102	}
103	if (len < 0)
104	return ERR;
105	if (appended && size && o_isbinary && o_newline_added)
106	fputs("newline inserted\n", stderr);
107	else if (newline_added && (!appended \|\| !isbinary && !o_isbinary))
108	fputs("newline appended\n", stderr);
109	if (isbinary && newline_added && !appended)
110	size += 1;
111	if (!size)
112	newline_added = 1;
113	newline_added = appended ? newline_added : o_newline_added;
114	isbinary = isbinary \| o_isbinary;
115	if (des)
116	size += 8 - size % 8; /* adjust DES size */
117	return size;
118	}
119
120
121	/* get_stream_line: read a line of text from a stream; return line length */
122	int
123	get_stream_line(fp)
124	FILE *fp;
125	{
126	register int c;
127	register int i = 0;
128
129	while (((c = des ? get_des_char(fp) : getc(fp)) != EOF \|\| !feof(fp) &&
130	!ferror(fp)) && c != '\n') {
131	REALLOC(sbuf, sbufsz, i + 1, ERR);
132	if (!(sbuf[i++] = c))
133	isbinary = 1;
134	}
135	REALLOC(sbuf, sbufsz, i + 2, ERR);
136	if (c == '\n')
137	sbuf[i++] = c;
138	else if (ferror(fp)) {
139	fprintf(stderr, "%s\n", strerror(errno));
140	sprintf(errmsg, "cannot read input file");
141	return ERR;
142	} else if (i) {
143	sbuf[i++] = '\n';
144	newline_added = 1;
145	}
146	sbuf[i] = '\0';
147	return (isbinary && newline_added && i) ? --i : i;
148	}
149
150
151	/* write_file: write a range of lines to a named file/pipe; return line count */
152	long
153	write_file(fn, mode, n, m)
154	char *fn;
155	char *mode;
156	long n;
157	long m;
158	{
159	FILE *fp;
160	long size;
161
162	fp = (*fn == '!') ? popen(fn+1, "w") : fopen(strip_escapes(fn), mode);
163	if (fp == NULL) {
164	fprintf(stderr, "%s: %s\n", fn, strerror(errno));
165	sprintf(errmsg, "cannot open output file");
166	return ERR;
167	} else if ((size = write_stream(fp, n, m)) < 0)
168	return ERR;
169	else if (((*fn == '!') ? pclose(fp) : fclose(fp)) < 0) {
170	fprintf(stderr, "%s: %s\n", fn, strerror(errno));
171	sprintf(errmsg, "cannot close output file");
172	return ERR;
173	}
174	fprintf(stderr, !scripted ? "%lu\n" : "", size);
175	return n ? m - n + 1 : 0;
176	}
177
178
179	/* write_stream: write a range of lines to a stream; return status */
180	long
181	write_stream(fp, n, m)
182	FILE *fp;
183	long n;
184	long m;
185	{
186	line_t *lp = get_addressed_line_node(n);
187	unsigned long size = 0;
188	char *s;
189	int len;
190
191	if (des)
192	init_des_cipher();
193	for (; n && n <= m; n++, lp = lp->q_forw) {
194	if ((s = get_sbuf_line(lp)) == NULL)
195	return ERR;
196	len = lp->len;
197	if (n != addr_last \|\| !isbinary \|\| !newline_added)
198	s[len++] = '\n';
199	if (put_stream_line(fp, s, len) < 0)
200	return ERR;
201	size += len;
202	}
203	if (des) {
204	flush_des_file(fp); /* flush buffer */
205	size += 8 - size % 8; /* adjust DES size */
206	}
207	return size;
208	}
209
210
211	/* put_stream_line: write a line of text to a stream; return status */
212	int
213	put_stream_line(fp, s, len)
214	FILE *fp;
215	char *s;
216	int len;
217	{
218	while (len--)
219	if ((des ? put_des_char(s++, fp) : fputc(s++, fp)) < 0) {
220	fprintf(stderr, "%s\n", strerror(errno));
221	sprintf(errmsg, "cannot write file");
222	return ERR;
223	}
224	return 0;
225	}
226
227	/* get_extended_line: get a an extended line from stdin */
228	char *
229	get_extended_line(sizep, nonl)
230	int *sizep;
231	int nonl;
232	{
233	static char cvbuf = NULL; / buffer */
234	static int cvbufsz = 0; /* buffer size */
235
236	int l, n;
237	char *t = ibufp;
238
239	while (*t++ != '\n')
240	;
241	if ((l = t - ibufp) < 2 \|\| !has_trailing_escape(ibufp, ibufp + l - 1)) {
242	*sizep = l;
243	return ibufp;
244	}
245	*sizep = -1;
246	REALLOC(cvbuf, cvbufsz, l, NULL);
247	memcpy(cvbuf, ibufp, l);
248	(cvbuf + --l - 1) = '\n'; / strip trailing esc */
249	if (nonl) l--; /* strip newline */
250	for (;;) {
251	if ((n = get_tty_line()) < 0)
252	return NULL;
253	else if (n == 0 \|\| ibuf[n - 1] != '\n') {
254	sprintf(errmsg, "unexpected end-of-file");
255	return NULL;
256	}
257	REALLOC(cvbuf, cvbufsz, l + n, NULL);
258	memcpy(cvbuf + l, ibuf, n);
259	l += n;
260	if (n < 2 \|\| !has_trailing_escape(cvbuf, cvbuf + l - 1))
261	break;
262	(cvbuf + --l - 1) = '\n'; / strip trailing esc */
263	if (nonl) l--; /* strip newline */
264	}
265	REALLOC(cvbuf, cvbufsz, l + 1, NULL);
266	cvbuf[l] = '\0';
267	*sizep = l;
268	return cvbuf;
269	}
270
271
272	/* get_tty_line: read a line of text from stdin; return line length */
273	int
274	get_tty_line()
275	{
276	register int oi = 0;
277	register int i = 0;
278	int c;
279
280	for (;;)
281	switch (c = getchar()) {
282	default:
283	oi = 0;
284	REALLOC(ibuf, ibufsz, i + 2, ERR);
285	if (!(ibuf[i++] = c)) isbinary = 1;
286	if (c != '\n')
287	continue;
288	lineno++;
289	ibuf[i] = '\0';
290	ibufp = ibuf;
291	return i;
292	case EOF:
293	if (ferror(stdin)) {
294	fprintf(stderr, "stdin: %s\n", strerror(errno));
295	sprintf(errmsg, "cannot read stdin");
296	clearerr(stdin);
297	ibufp = NULL;
298	return ERR;
299	} else {
300	clearerr(stdin);
301	if (i != oi) {
302	oi = i;
303	continue;
304	} else if (i)
305	ibuf[i] = '\0';
306	ibufp = ibuf;
307	return i;
308	}
309	}
310	}
311
312
313
314	#define ESCAPES "\a\b\f\n\r\t\v\\"
315	#define ESCCHARS "abfnrtv\\"
316
317	extern int rows;
318	extern int cols;
319
320	/* put_tty_line: print text to stdout */
321	int
322	put_tty_line(s, l, n, gflag)
323	char *s;
324	int l;
325	long n;
326	int gflag;
327	{
328	int col = 0;
329	int lc = 0;
330	char *cp;
331
332	if (gflag & GNP) {
333	printf("%ld\t", n);
334	col = 8;
335	}
336	for (; l--; s++) {
337	if ((gflag & GLS) && ++col > cols) {
338	fputs("\\\n", stdout);
339	col = 1;
340	#ifndef BACKWARDS
341	if (!scripted && !isglobal && ++lc > rows) {
342	lc = 0;
343	fputs("Press <RETURN> to continue... ", stdout);
344	fflush(stdout);
345	if (get_tty_line() < 0)
346	return ERR;
347	}
348	#endif
349	}
350	if (gflag & GLS) {
351	if (31 < s && s < 127 && *s != '\\')
352	putchar(*s);
353	else {
354	putchar('\\');
355	col++;
356	if (s && (cp = strchr(ESCAPES, s)) != NULL)
357	putchar(ESCCHARS[cp - ESCAPES]);
358	else {
359	putchar((((unsigned char) *s & 0300) >> 6) + '0');
360	putchar((((unsigned char) *s & 070) >> 3) + '0');
361	putchar(((unsigned char) *s & 07) + '0');
362	col += 2;
363	}
364	}
365
366	} else
367	putchar(*s);
368	}
369	#ifndef BACKWARDS
370	if (gflag & GLS)
371	putchar('$');
372	#endif
373	putchar('\n');
374	return 0;
375	}