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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	bin/ed/buf.c	Lines:	0	107	0.0 %
Date:	2017-11-13	Branches:	0	86	0.0 %


/*	$OpenBSD: buf.c,v 1.23 2016/03/22 17:58:28 mmcc Exp $	*/
/*	$NetBSD: buf.c,v 1.15 1995/04/23 10:07:28 cgd Exp $	*/

/* buf.c: This file contains the scratch-file buffer 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.
 */

#include <sys/types.h>
#include <sys/stat.h>

#include <limits.h>
#include <regex.h>
#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

#include "ed.h"


static FILE *sfp;			/* scratch file pointer */
static off_t sfseek;			/* scratch file position */
static int seek_write;			/* seek before writing */
static line_t buffer_head;		/* incore buffer */

/* get_sbuf_line: get a line of text from the scratch file; return pointer
   to the text */
char *
get_sbuf_line(line_t *lp)
{
	static char *sfbuf = NULL;	/* buffer */
	static int sfbufsz = 0;		/* buffer size */

	int len, ct;

	if (lp == &buffer_head)
		return NULL;
	seek_write = 1;				/* force seek on write */
	/* out of position */
	if (sfseek != lp->seek) {
		sfseek = lp->seek;
		if (fseeko(sfp, sfseek, SEEK_SET) < 0) {
			perror(NULL);
			seterrmsg("cannot seek temp file");
			return NULL;
		}
	}
	len = lp->len;
	REALLOC(sfbuf, sfbufsz, len + 1, NULL);
	if ((ct = fread(sfbuf, sizeof(char), len, sfp)) <  0 || ct != len) {
		perror(NULL);
		seterrmsg("cannot read temp file");
		return NULL;
	}
	sfseek += len;				/* update file position */
	sfbuf[len] = '\0';
	return sfbuf;
}


/* put_sbuf_line: write a line of text to the scratch file and add a line node
   to the editor buffer;  return a pointer to the end of the text */
char *
put_sbuf_line(char *cs)
{
	line_t *lp;
	int len, ct;
	char *s;

	if ((lp = malloc(sizeof(line_t))) == NULL) {
		perror(NULL);
		seterrmsg("out of memory");
		return NULL;
	}
	/* assert: cs is '\n' terminated */
	for (s = cs; *s != '\n'; s++)
		;
	if (s - cs >= LINECHARS) {
		seterrmsg("line too long");
		free(lp);
		return NULL;
	}
	len = s - cs;
	/* out of position */
	if (seek_write) {
		if (fseek(sfp, 0L, SEEK_END) < 0) {
			perror(NULL);
			seterrmsg("cannot seek temp file");
			free(lp);
			return NULL;
		}
		sfseek = ftello(sfp);
		seek_write = 0;
	}
	/* assert: SPL1() */
	if ((ct = fwrite(cs, sizeof(char), len, sfp)) < 0 || ct != len) {
		sfseek = -1;
		perror(NULL);
		seterrmsg("cannot write temp file");
		free(lp);
		return NULL;
	}
	lp->len = len;
	lp->seek  = sfseek;
	add_line_node(lp);
	sfseek += len;			/* update file position */
	return ++s;
}


/* add_line_node: add a line node in the editor buffer after the current line */
void
add_line_node(line_t *lp)
{
	line_t *cp;

	/* this get_addressed_line_node last! */
	cp = get_addressed_line_node(current_addr);
	INSQUE(lp, cp);
	addr_last++;
	current_addr++;
}


/* get_line_node_addr: return line number of pointer */
int
get_line_node_addr(line_t *lp)
{
	line_t *cp = &buffer_head;
	int n = 0;

	while (cp != lp && (cp = cp->q_forw) != &buffer_head)
		n++;
	if (n && cp == &buffer_head) {
		seterrmsg("invalid address");
		return ERR;
	 }
	 return n;
}


/* get_addressed_line_node: return pointer to a line node in the editor buffer */
line_t *
get_addressed_line_node(int n)
{
	static line_t *lp = &buffer_head;
	static int on = 0;

	SPL1();
	if (n > on) {
		if (n <= (on + addr_last) >> 1)
			for (; on < n; on++)
				lp = lp->q_forw;
		else {
			lp = buffer_head.q_back;
			for (on = addr_last; on > n; on--)
				lp = lp->q_back;
		}
	} else {
		if (n >= on >> 1)
			for (; on > n; on--)
				lp = lp->q_back;
		else {
			lp = &buffer_head;
			for (on = 0; on < n; on++)
				lp = lp->q_forw;
		}
	}
	SPL0();
	return lp;
}


extern int newline_added;

#define SCRATCH_TEMPLATE      "/tmp/ed.XXXXXXXXXX"
static char sfn[sizeof(SCRATCH_TEMPLATE)+1] = "";	/* scratch file name */

/* open_sbuf: open scratch file */
int
open_sbuf(void)
{
	int fd = -1;

	isbinary = newline_added = 0;
	strlcpy(sfn, SCRATCH_TEMPLATE, sizeof sfn);
	if ((fd = mkstemp(sfn)) == -1 ||
	    (sfp = fdopen(fd, "w+")) == NULL) {
		if (fd != -1)
			close(fd);
		perror(sfn);
		seterrmsg("cannot open temp file");
		return ERR;
	}
	return 0;
}


/* close_sbuf: close scratch file */
int
close_sbuf(void)
{
	if (sfp) {
		if (fclose(sfp) < 0) {
			perror(sfn);
			seterrmsg("cannot close temp file");
			return ERR;
		}
		sfp = NULL;
		unlink(sfn);
	}
	sfseek = seek_write = 0;
	return 0;
}


/* quit: remove_lines scratch file and exit */
void
quit(int n)
{
	if (sfp) {
		fclose(sfp);
		unlink(sfn);
	}
	exit(n);
}


static unsigned char ctab[256];		/* character translation table */

/* init_buffers: open scratch buffer; initialize line queue */
void
init_buffers(void)
{
	int i = 0;

	/* Read stdin one character at a time to avoid i/o contention
	   with shell escapes invoked by nonterminal input, e.g.,
	   ed - <<EOF
	   !cat
	   hello, world
	   EOF */
	setvbuf(stdin, NULL, _IONBF, 0);
	if (open_sbuf() < 0)
		quit(2);
	REQUE(&buffer_head, &buffer_head);
	for (i = 0; i < 256; i++)
		ctab[i] = i;
}


/* translit_text: translate characters in a string */
char *
translit_text(char *s, int len, int from, int to)
{
	static int i = 0;

	unsigned char *us;

	ctab[i] = i;			/* restore table to initial state */
	ctab[i = from] = to;
	for (us = (unsigned char *) s; len-- > 0; us++)
		*us = ctab[*us];
	return s;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: buf.c,v 1.23 2016/03/22 17:58:28 mmcc Exp $ */
2			/* $NetBSD: buf.c,v 1.15 1995/04/23 10:07:28 cgd Exp $ */
3
4			/* buf.c: This file contains the scratch-file buffer routines for the
5			ed line editor. */
6			/*-
7			* Copyright (c) 1993 Andrew Moore, Talke Studio.
8			* All rights reserved.
9			*
10			* Redistribution and use in source and binary forms, with or without
11			* modification, are permitted provided that the following conditions
12			* are met:
13			* 1. Redistributions of source code must retain the above copyright
14			* notice, this list of conditions and the following disclaimer.
15			* 2. Redistributions in binary form must reproduce the above copyright
16			* notice, this list of conditions and the following disclaimer in the
17			* documentation and/or other materials provided with the distribution.
18			*
19			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22			* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29			* SUCH DAMAGE.
30			*/
31
32			#include <sys/types.h>
33			#include <sys/stat.h>
34
35			#include <limits.h>
36			#include <regex.h>
37			#include <signal.h>
38			#include <stdlib.h>
39			#include <stdio.h>
40			#include <string.h>
41			#include <unistd.h>
42
43			#include "ed.h"
44
45
46			static FILE sfp; / scratch file pointer */
47			static off_t sfseek; /* scratch file position */
48			static int seek_write; /* seek before writing */
49			static line_t buffer_head; /* incore buffer */
50
51			/* get_sbuf_line: get a line of text from the scratch file; return pointer
52			to the text */
53			char *
54			get_sbuf_line(line_t *lp)
55			{
56			static char sfbuf = NULL; / buffer */
57			static int sfbufsz = 0; /* buffer size */
58
59			int len, ct;
60
61			if (lp == &buffer_head)
62			return NULL;
63			seek_write = 1; /* force seek on write */
64			/* out of position */
65			if (sfseek != lp->seek) {
66			sfseek = lp->seek;
67			if (fseeko(sfp, sfseek, SEEK_SET) < 0) {
68			perror(NULL);
69			seterrmsg("cannot seek temp file");
70			return NULL;
71			}
72			}
73			len = lp->len;
74			REALLOC(sfbuf, sfbufsz, len + 1, NULL);
75			if ((ct = fread(sfbuf, sizeof(char), len, sfp)) < 0 \|\| ct != len) {
76			perror(NULL);
77			seterrmsg("cannot read temp file");
78			return NULL;
79			}
80			sfseek += len; /* update file position */
81			sfbuf[len] = '\0';
82			return sfbuf;
83			}
84
85
86			/* put_sbuf_line: write a line of text to the scratch file and add a line node
87			to the editor buffer; return a pointer to the end of the text */
88			char *
89			put_sbuf_line(char *cs)
90			{
91			line_t *lp;
92			int len, ct;
93			char *s;
94
95			if ((lp = malloc(sizeof(line_t))) == NULL) {
96			perror(NULL);
97			seterrmsg("out of memory");
98			return NULL;
99			}
100			/* assert: cs is '\n' terminated */
101			for (s = cs; *s != '\n'; s++)
102			;
103			if (s - cs >= LINECHARS) {
104			seterrmsg("line too long");
105			free(lp);
106			return NULL;
107			}
108			len = s - cs;
109			/* out of position */
110			if (seek_write) {
111			if (fseek(sfp, 0L, SEEK_END) < 0) {
112			perror(NULL);
113			seterrmsg("cannot seek temp file");
114			free(lp);
115			return NULL;
116			}
117			sfseek = ftello(sfp);
118			seek_write = 0;
119			}
120			/* assert: SPL1() */
121			if ((ct = fwrite(cs, sizeof(char), len, sfp)) < 0 \|\| ct != len) {
122			sfseek = -1;
123			perror(NULL);
124			seterrmsg("cannot write temp file");
125			free(lp);
126			return NULL;
127			}
128			lp->len = len;
129			lp->seek = sfseek;
130			add_line_node(lp);
131			sfseek += len; /* update file position */
132			return ++s;
133			}
134
135
136			/* add_line_node: add a line node in the editor buffer after the current line */
137			void
138			add_line_node(line_t *lp)
139			{
140			line_t *cp;
141
142			/* this get_addressed_line_node last! */
143			cp = get_addressed_line_node(current_addr);
144			INSQUE(lp, cp);
145			addr_last++;
146			current_addr++;
147			}
148
149
150			/* get_line_node_addr: return line number of pointer */
151			int
152			get_line_node_addr(line_t *lp)
153			{
154			line_t *cp = &buffer_head;
155			int n = 0;
156
157			while (cp != lp && (cp = cp->q_forw) != &buffer_head)
158			n++;
159			if (n && cp == &buffer_head) {
160			seterrmsg("invalid address");
161			return ERR;
162			}
163			return n;
164			}
165
166
167			/* get_addressed_line_node: return pointer to a line node in the editor buffer */
168			line_t *
169			get_addressed_line_node(int n)
170			{
171			static line_t *lp = &buffer_head;
172			static int on = 0;
173
174			SPL1();
175			if (n > on) {
176			if (n <= (on + addr_last) >> 1)
177			for (; on < n; on++)
178			lp = lp->q_forw;
179			else {
180			lp = buffer_head.q_back;
181			for (on = addr_last; on > n; on--)
182			lp = lp->q_back;
183			}
184			} else {
185			if (n >= on >> 1)
186			for (; on > n; on--)
187			lp = lp->q_back;
188			else {
189			lp = &buffer_head;
190			for (on = 0; on < n; on++)
191			lp = lp->q_forw;
192			}
193			}
194			SPL0();
195			return lp;
196			}
197
198
199			extern int newline_added;
200
201			#define SCRATCH_TEMPLATE "/tmp/ed.XXXXXXXXXX"
202			static char sfn[sizeof(SCRATCH_TEMPLATE)+1] = ""; /* scratch file name */
203
204			/* open_sbuf: open scratch file */
205			int
206			open_sbuf(void)
207			{
208			int fd = -1;
209
210			isbinary = newline_added = 0;
211			strlcpy(sfn, SCRATCH_TEMPLATE, sizeof sfn);
212			if ((fd = mkstemp(sfn)) == -1 \|\|
213			(sfp = fdopen(fd, "w+")) == NULL) {
214			if (fd != -1)
215			close(fd);
216			perror(sfn);
217			seterrmsg("cannot open temp file");
218			return ERR;
219			}
220			return 0;
221			}
222
223
224			/* close_sbuf: close scratch file */
225			int
226			close_sbuf(void)
227			{
228			if (sfp) {
229			if (fclose(sfp) < 0) {
230			perror(sfn);
231			seterrmsg("cannot close temp file");
232			return ERR;
233			}
234			sfp = NULL;
235			unlink(sfn);
236			}
237			sfseek = seek_write = 0;
238			return 0;
239			}
240
241
242			/* quit: remove_lines scratch file and exit */
243			void
244			quit(int n)
245			{
246			if (sfp) {
247			fclose(sfp);
248			unlink(sfn);
249			}
250			exit(n);
251			}
252
253
254			static unsigned char ctab[256]; /* character translation table */
255
256			/* init_buffers: open scratch buffer; initialize line queue */
257			void
258			init_buffers(void)
259			{
260			int i = 0;
261
262			/* Read stdin one character at a time to avoid i/o contention
263			with shell escapes invoked by nonterminal input, e.g.,
264			ed - <<EOF
265			!cat
266			hello, world
267			EOF */
268			setvbuf(stdin, NULL, _IONBF, 0);
269			if (open_sbuf() < 0)
270			quit(2);
271			REQUE(&buffer_head, &buffer_head);
272			for (i = 0; i < 256; i++)
273			ctab[i] = i;
274			}
275
276
277			/* translit_text: translate characters in a string */
278			char *
279			translit_text(char *s, int len, int from, int to)
280			{
281			static int i = 0;
282
283			unsigned char *us;
284
285			ctab[i] = i; /* restore table to initial state */
286			ctab[i = from] = to;
287			for (us = (unsigned char *) s; len-- > 0; us++)
288			us = ctab[us];
289			return s;
290			}