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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/vi/build/../vi/getc.c	Lines:	0	73	0.0 %
Date:	2017-11-13	Branches:	0	67	0.0 %


/*	$OpenBSD: getc.c,v 1.10 2016/01/06 22:28:52 millert Exp $	*/

/*-
 * Copyright (c) 1992, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 * Copyright (c) 1992, 1993, 1994, 1995, 1996
 *	Keith Bostic.  All rights reserved.
 *
 * See the LICENSE file for redistribution information.
 */

#include "config.h"

#include <sys/types.h>
#include <sys/queue.h>
#include <sys/time.h>

#include <bitstring.h>
#include <ctype.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>

#include "../common/common.h"
#include "vi.h"

/*
 * Character stream routines --
 *	These routines return the file a character at a time.  There are two
 *	special cases.  First, the end of a line, end of a file, start of a
 *	file and empty lines are returned as special cases, and no character
 *	is returned.  Second, empty lines include lines that have only white
 *	space in them, because the vi search functions don't care about white
 *	space, and this makes it easier for them to be consistent.
 */

/*
 * cs_init --
 *	Initialize character stream routines.
 *
 * PUBLIC: int cs_init(SCR *, VCS *);
 */
int
cs_init(SCR *sp, VCS *csp)
{
	int isempty;

	if (db_eget(sp, csp->cs_lno, (char **) &csp->cs_bp, &csp->cs_len,
	    &isempty)) {
		if (isempty)
			msgq(sp, M_BERR, "Empty file");
		return (1);
	}
	if (csp->cs_len == 0 || v_isempty(csp->cs_bp, csp->cs_len)) {
		csp->cs_cno = 0;
		csp->cs_flags = CS_EMP;
	} else {
		csp->cs_flags = 0;
		csp->cs_ch = csp->cs_bp[csp->cs_cno];
	}
	return (0);
}

/*
 * cs_next --
 *	Retrieve the next character.
 *
 * PUBLIC: int cs_next(SCR *, VCS *);
 */
int
cs_next(SCR *sp, VCS *csp)
{
	char *p;

	switch (csp->cs_flags) {
	case CS_EMP:				/* EMP; get next line. */
	case CS_EOL:				/* EOL; get next line. */
		if (db_get(sp, ++csp->cs_lno, 0, &p, &csp->cs_len)) {
			--csp->cs_lno;
			csp->cs_flags = CS_EOF;
		} else {
			csp->cs_bp = p;
			if (csp->cs_len == 0 ||
			    v_isempty(csp->cs_bp, csp->cs_len)) {
				csp->cs_cno = 0;
				csp->cs_flags = CS_EMP;
			} else {
				csp->cs_flags = 0;
				csp->cs_ch = csp->cs_bp[csp->cs_cno = 0];
			}
		}
		break;
	case 0:
		if (csp->cs_cno == csp->cs_len - 1)
			csp->cs_flags = CS_EOL;
		else
			csp->cs_ch = csp->cs_bp[++csp->cs_cno];
		break;
	case CS_EOF:				/* EOF. */
		break;
	default:
		abort();
		/* NOTREACHED */
	}
	return (0);
}

/*
 * cs_fspace --
 *	If on a space, eat forward until something other than a
 *	whitespace character.
 *
 * XXX
 * Semantics of checking the current character were coded for the fword()
 * function -- once the other word routines are converted, they may have
 * to change.
 *
 * PUBLIC: int cs_fspace(SCR *, VCS *);
 */
int
cs_fspace(SCR *sp, VCS *csp)
{
	if (csp->cs_flags != 0 || !isblank(csp->cs_ch))
		return (0);
	for (;;) {
		if (cs_next(sp, csp))
			return (1);
		if (csp->cs_flags != 0 || !isblank(csp->cs_ch))
			break;
	}
	return (0);
}

/*
 * cs_fblank --
 *	Eat forward to the next non-whitespace character.
 *
 * PUBLIC: int cs_fblank(SCR *, VCS *);
 */
int
cs_fblank(SCR *sp, VCS *csp)
{
	for (;;) {
		if (cs_next(sp, csp))
			return (1);
		if (csp->cs_flags == CS_EOL || csp->cs_flags == CS_EMP ||
		    (csp->cs_flags == 0 && isblank(csp->cs_ch)))
			continue;
		break;
	}
	return (0);
}

/*
 * cs_prev --
 *	Retrieve the previous character.
 *
 * PUBLIC: int cs_prev(SCR *, VCS *);
 */
int
cs_prev(SCR *sp, VCS *csp)
{
	switch (csp->cs_flags) {
	case CS_EMP:				/* EMP; get previous line. */
	case CS_EOL:				/* EOL; get previous line. */
		if (csp->cs_lno == 1) {		/* SOF. */
			csp->cs_flags = CS_SOF;
			break;
		}
		if (db_get(sp,			/* The line should exist. */
		    --csp->cs_lno, DBG_FATAL, (char **) &csp->cs_bp,
		    &csp->cs_len)) {
			++csp->cs_lno;
			return (1);
		}
		if (csp->cs_len == 0 || v_isempty(csp->cs_bp, csp->cs_len)) {
			csp->cs_cno = 0;
			csp->cs_flags = CS_EMP;
		} else {
			csp->cs_flags = 0;
			csp->cs_cno = csp->cs_len - 1;
			csp->cs_ch = csp->cs_bp[csp->cs_cno];
		}
		break;
	case CS_EOF:				/* EOF: get previous char. */
	case 0:
		if (csp->cs_cno == 0)
			if (csp->cs_lno == 1)
				csp->cs_flags = CS_SOF;
			else
				csp->cs_flags = CS_EOL;
		else
			csp->cs_ch = csp->cs_bp[--csp->cs_cno];
		break;
	case CS_SOF:				/* SOF. */
		break;
	default:
		abort();
		/* NOTREACHED */
	}
	return (0);
}

/*
 * cs_bblank --
 *	Eat backward to the next non-whitespace character.
 *
 * PUBLIC: int cs_bblank(SCR *, VCS *);
 */
int
cs_bblank(SCR *sp, VCS *csp)
{
	for (;;) {
		if (cs_prev(sp, csp))
			return (1);
		if (csp->cs_flags == CS_EOL || csp->cs_flags == CS_EMP ||
		    (csp->cs_flags == 0 && isblank(csp->cs_ch)))
			continue;
		break;
	}
	return (0);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: getc.c,v 1.10 2016/01/06 22:28:52 millert Exp $ */
2
3			/*-
4			* Copyright (c) 1992, 1993, 1994
5			* The Regents of the University of California. All rights reserved.
6			* Copyright (c) 1992, 1993, 1994, 1995, 1996
7			* Keith Bostic. All rights reserved.
8			*
9			* See the LICENSE file for redistribution information.
10			*/
11
12			#include "config.h"
13
14			#include <sys/types.h>
15			#include <sys/queue.h>
16			#include <sys/time.h>
17
18			#include <bitstring.h>
19			#include <ctype.h>
20			#include <limits.h>
21			#include <stdio.h>
22			#include <stdlib.h>
23
24			#include "../common/common.h"
25			#include "vi.h"
26
27			/*
28			* Character stream routines --
29			* These routines return the file a character at a time. There are two
30			* special cases. First, the end of a line, end of a file, start of a
31			* file and empty lines are returned as special cases, and no character
32			* is returned. Second, empty lines include lines that have only white
33			* space in them, because the vi search functions don't care about white
34			* space, and this makes it easier for them to be consistent.
35			*/
36
37			/*
38			* cs_init --
39			* Initialize character stream routines.
40			*
41			* PUBLIC: int cs_init(SCR , VCS );
42			*/
43			int
44			cs_init(SCR sp, VCS csp)
45			{
46			int isempty;
47
48			if (db_eget(sp, csp->cs_lno, (char **) &csp->cs_bp, &csp->cs_len,
49			&isempty)) {
50			if (isempty)
51			msgq(sp, M_BERR, "Empty file");
52			return (1);
53			}
54			if (csp->cs_len == 0 \|\| v_isempty(csp->cs_bp, csp->cs_len)) {
55			csp->cs_cno = 0;
56			csp->cs_flags = CS_EMP;
57			} else {
58			csp->cs_flags = 0;
59			csp->cs_ch = csp->cs_bp[csp->cs_cno];
60			}
61			return (0);
62			}
63
64			/*
65			* cs_next --
66			* Retrieve the next character.
67			*
68			* PUBLIC: int cs_next(SCR , VCS );
69			*/
70			int
71			cs_next(SCR sp, VCS csp)
72			{
73			char *p;
74
75			switch (csp->cs_flags) {
76			case CS_EMP: /* EMP; get next line. */
77			case CS_EOL: /* EOL; get next line. */
78			if (db_get(sp, ++csp->cs_lno, 0, &p, &csp->cs_len)) {
79			--csp->cs_lno;
80			csp->cs_flags = CS_EOF;
81			} else {
82			csp->cs_bp = p;
83			if (csp->cs_len == 0 \|\|
84			v_isempty(csp->cs_bp, csp->cs_len)) {
85			csp->cs_cno = 0;
86			csp->cs_flags = CS_EMP;
87			} else {
88			csp->cs_flags = 0;
89			csp->cs_ch = csp->cs_bp[csp->cs_cno = 0];
90			}
91			}
92			break;
93			case 0:
94			if (csp->cs_cno == csp->cs_len - 1)
95			csp->cs_flags = CS_EOL;
96			else
97			csp->cs_ch = csp->cs_bp[++csp->cs_cno];
98			break;
99			case CS_EOF: /* EOF. */
100			break;
101			default:
102			abort();
103			/* NOTREACHED */
104			}
105			return (0);
106			}
107
108			/*
109			* cs_fspace --
110			* If on a space, eat forward until something other than a
111			* whitespace character.
112			*
113			* XXX
114			* Semantics of checking the current character were coded for the fword()
115			* function -- once the other word routines are converted, they may have
116			* to change.
117			*
118			* PUBLIC: int cs_fspace(SCR , VCS );
119			*/
120			int
121			cs_fspace(SCR sp, VCS csp)
122			{
123			if (csp->cs_flags != 0 \|\| !isblank(csp->cs_ch))
124			return (0);
125			for (;;) {
126			if (cs_next(sp, csp))
127			return (1);
128			if (csp->cs_flags != 0 \|\| !isblank(csp->cs_ch))
129			break;
130			}
131			return (0);
132			}
133
134			/*
135			* cs_fblank --
136			* Eat forward to the next non-whitespace character.
137			*
138			* PUBLIC: int cs_fblank(SCR , VCS );
139			*/
140			int
141			cs_fblank(SCR sp, VCS csp)
142			{
143			for (;;) {
144			if (cs_next(sp, csp))
145			return (1);
146			if (csp->cs_flags == CS_EOL \|\| csp->cs_flags == CS_EMP \|\|
147			(csp->cs_flags == 0 && isblank(csp->cs_ch)))
148			continue;
149			break;
150			}
151			return (0);
152			}
153
154			/*
155			* cs_prev --
156			* Retrieve the previous character.
157			*
158			* PUBLIC: int cs_prev(SCR , VCS );
159			*/
160			int
161			cs_prev(SCR sp, VCS csp)
162			{
163			switch (csp->cs_flags) {
164			case CS_EMP: /* EMP; get previous line. */
165			case CS_EOL: /* EOL; get previous line. */
166			if (csp->cs_lno == 1) { /* SOF. */
167			csp->cs_flags = CS_SOF;
168			break;
169			}
170			if (db_get(sp, /* The line should exist. */
171			--csp->cs_lno, DBG_FATAL, (char **) &csp->cs_bp,
172			&csp->cs_len)) {
173			++csp->cs_lno;
174			return (1);
175			}
176			if (csp->cs_len == 0 \|\| v_isempty(csp->cs_bp, csp->cs_len)) {
177			csp->cs_cno = 0;
178			csp->cs_flags = CS_EMP;
179			} else {
180			csp->cs_flags = 0;
181			csp->cs_cno = csp->cs_len - 1;
182			csp->cs_ch = csp->cs_bp[csp->cs_cno];
183			}
184			break;
185			case CS_EOF: /* EOF: get previous char. */
186			case 0:
187			if (csp->cs_cno == 0)
188			if (csp->cs_lno == 1)
189			csp->cs_flags = CS_SOF;
190			else
191			csp->cs_flags = CS_EOL;
192			else
193			csp->cs_ch = csp->cs_bp[--csp->cs_cno];
194			break;
195			case CS_SOF: /* SOF. */
196			break;
197			default:
198			abort();
199			/* NOTREACHED */
200			}
201			return (0);
202			}
203
204			/*
205			* cs_bblank --
206			* Eat backward to the next non-whitespace character.
207			*
208			* PUBLIC: int cs_bblank(SCR , VCS );
209			*/
210			int
211			cs_bblank(SCR sp, VCS csp)
212			{
213			for (;;) {
214			if (cs_prev(sp, csp))
215			return (1);
216			if (csp->cs_flags == CS_EOL \|\| csp->cs_flags == CS_EMP \|\|
217			(csp->cs_flags == 0 && isblank(csp->cs_ch)))
218			continue;
219			break;
220			}
221			return (0);
222			}