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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libedit/parse.c	Lines:	22	96	22.9 %
Date:	2017-11-13	Branches:	10	77	13.0 %


/*	$OpenBSD: parse.c,v 1.20 2016/04/11 21:17:29 schwarze Exp $	*/
/*	$NetBSD: parse.c,v 1.38 2016/04/11 18:56:31 christos Exp $	*/

/*-
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Christos Zoulas of Cornell University.
 *
 * 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 "config.h"

/*
 * parse.c: parse an editline extended command
 *
 * commands are:
 *
 *	bind
 *	echotc
 *	edit
 *	gettc
 *	history
 *	settc
 *	setty
 */
#include <stdlib.h>
#include <string.h>

#include "el.h"
#include "parse.h"

static const struct {
	const wchar_t *name;
	int (*func)(EditLine *, int, const wchar_t **);
} cmds[] = {
	{ L"bind",		map_bind	},
	{ L"echotc",		terminal_echotc	},
	{ L"edit",		el_editmode	},
	{ L"history",		hist_command	},
	{ L"telltc",		terminal_telltc	},
	{ L"settc",		terminal_settc	},
	{ L"setty",		tty_stty	},
	{ NULL,			NULL		}
};


/* parse_line():
 *	Parse a line and dispatch it
 */
protected int
parse_line(EditLine *el, const wchar_t *line)
{
	const wchar_t **argv;
	int argc;
	TokenizerW *tok;

	tok = tok_winit(NULL);
	tok_wstr(tok, line, &argc, &argv);
	argc = el_wparse(el, argc, argv);
	tok_wend(tok);
	return argc;
}


/* el_parse():
 *	Command dispatcher
 */
int
el_wparse(EditLine *el, int argc, const wchar_t *argv[])
{
	const wchar_t *ptr;
	int i;

	if (argc < 1)
		return -1;
	ptr = wcschr(argv[0], L':');
	if (ptr != NULL) {
		wchar_t *tprog;
		size_t l;

		if (ptr == argv[0])
			return 0;
		l = ptr - argv[0] - 1;
		tprog = reallocarray(NULL, l + 1, sizeof(*tprog));
		if (tprog == NULL)
			return 0;
		(void) wcsncpy(tprog, argv[0], l);
		tprog[l] = '\0';
		ptr++;
		l = el_match(el->el_prog, tprog);
		free(tprog);
		if (!l)
			return 0;
	} else
		ptr = argv[0];

	for (i = 0; cmds[i].name != NULL; i++)
		if (wcscmp(cmds[i].name, ptr) == 0) {
			i = (*cmds[i].func) (el, argc, argv);
			return -i;
		}
	return -1;
}


/* parse__escape():
 *	Parse a string of the form ^<char> \<odigit> \<char> \U+xxxx and return
 *	the appropriate character or -1 if the escape is not valid
 */
protected int
parse__escape(const wchar_t **ptr)
{
	const wchar_t *p;
	wint_t c;

	p = *ptr;

	if (p[1] == 0)
		return -1;

	if (*p == '\\') {
		p++;
		switch (*p) {
		case 'a':
			c = '\007';	/* Bell */
			break;
		case 'b':
			c = '\010';	/* Backspace */
			break;
		case 't':
			c = '\011';	/* Horizontal Tab */
			break;
		case 'n':
			c = '\012';	/* New Line */
			break;
		case 'v':
			c = '\013';	/* Vertical Tab */
			break;
		case 'f':
			c = '\014';	/* Form Feed */
			break;
		case 'r':
			c = '\015';	/* Carriage Return */
			break;
		case 'e':
			c = '\033';	/* Escape */
			break;
		case 'U':		/* Unicode \U+xxxx or \U+xxxxx format */
		{
			int i;
			const wchar_t hex[] = L"0123456789ABCDEF";
			const wchar_t *h;
			++p;
			if (*p++ != '+')
				return -1;
			c = 0;
			for (i = 0; i < 5; ++i) {
				h = wcschr(hex, *p++);
				if (!h && i < 4)
					return -1;
				else if (h)
					c = (c << 4) | ((int)(h - hex));
				else
					--p;
			}
			if (c > 0x10FFFF) /* outside valid character range */
				return -1;
			break;
		}
		case '0':
		case '1':
		case '2':
		case '3':
		case '4':
		case '5':
		case '6':
		case '7':
		{
			int cnt, ch;

			for (cnt = 0, c = 0; cnt < 3; cnt++) {
				ch = *p++;
				if (ch < '0' || ch > '7') {
					p--;
					break;
				}
				c = (c << 3) | (ch - '0');
			}
			if ((c & 0xffffff00) != 0)
				return -1;
			--p;
			break;
		}
		default:
			c = *p;
			break;
		}
	} else if (*p == '^') {
		p++;
		c = (*p == '?') ? '\177' : (*p & 0237);
	} else
		c = *p;
	*ptr = ++p;
	return c;
}

/* parse__string():
 *	Parse the escapes from in and put the raw string out
 */
protected wchar_t *
parse__string(wchar_t *out, const wchar_t *in)
{
	wchar_t *rv = out;
	int n;

	for (;;)
		switch (*in) {
		case '\0':
			*out = '\0';
			return rv;

		case '\\':
		case '^':
			if ((n = parse__escape(&in)) == -1)
				return NULL;
			*out++ = (wchar_t)n;
			break;

		case 'M':
			if (in[1] == '-' && in[2] != '\0') {
				*out++ = '\033';
				in += 2;
				break;
			}
			/*FALLTHROUGH*/

		default:
			*out++ = *in++;
			break;
		}
}


/* parse_cmd():
 *	Return the command number for the command string given
 *	or -1 if one is not found
 */
protected int
parse_cmd(EditLine *el, const wchar_t *cmd)
{
	el_bindings_t *b;
	int i;

	for (b = el->el_map.help, i = 0; i < el->el_map.nfunc; i++)
		if (wcscmp(b[i].name, cmd) == 0)
			return b[i].func;
	return -1;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: parse.c,v 1.20 2016/04/11 21:17:29 schwarze Exp $ */
2			/* $NetBSD: parse.c,v 1.38 2016/04/11 18:56:31 christos Exp $ */
3
4			/*-
5			* Copyright (c) 1992, 1993
6			* The Regents of the University of California. All rights reserved.
7			*
8			* This code is derived from software contributed to Berkeley by
9			* Christos Zoulas of Cornell University.
10			*
11			* Redistribution and use in source and binary forms, with or without
12			* modification, are permitted provided that the following conditions
13			* are met:
14			* 1. Redistributions of source code must retain the above copyright
15			* notice, this list of conditions and the following disclaimer.
16			* 2. Redistributions in binary form must reproduce the above copyright
17			* notice, this list of conditions and the following disclaimer in the
18			* documentation and/or other materials provided with the distribution.
19			* 3. Neither the name of the University nor the names of its contributors
20			* may be used to endorse or promote products derived from this software
21			* without specific prior written permission.
22			*
23			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33			* SUCH DAMAGE.
34			*/
35
36			#include "config.h"
37
38			/*
39			* parse.c: parse an editline extended command
40			*
41			* commands are:
42			*
43			* bind
44			* echotc
45			* edit
46			* gettc
47			* history
48			* settc
49			* setty
50			*/
51			#include <stdlib.h>
52			#include <string.h>
53
54			#include "el.h"
55			#include "parse.h"
56
57			static const struct {
58			const wchar_t *name;
59			int (func)(EditLine , int, const wchar_t **);
60			} cmds[] = {
61			{ L"bind", map_bind },
62			{ L"echotc", terminal_echotc },
63			{ L"edit", el_editmode },
64			{ L"history", hist_command },
65			{ L"telltc", terminal_telltc },
66			{ L"settc", terminal_settc },
67			{ L"setty", tty_stty },
68			{ NULL, NULL }
69			};
70
71
72			/* parse_line():
73			* Parse a line and dispatch it
74			*/
75			protected int
76			parse_line(EditLine el, const wchar_t line)
77			{
78			const wchar_t **argv;
79			int argc;
80			TokenizerW *tok;
81
82			tok = tok_winit(NULL);
83			tok_wstr(tok, line, &argc, &argv);
84			argc = el_wparse(el, argc, argv);
85			tok_wend(tok);
86			return argc;
87			}
88
89
90			/* el_parse():
91			* Command dispatcher
92			*/
93			int
94			el_wparse(EditLine el, int argc, const wchar_t argv[])
95			{
96			const wchar_t *ptr;
97			int i;
98
99			if (argc < 1)
100			return -1;
101			ptr = wcschr(argv[0], L':');
102			if (ptr != NULL) {
103			wchar_t *tprog;
104			size_t l;
105
106			if (ptr == argv[0])
107			return 0;
108			l = ptr - argv[0] - 1;
109			tprog = reallocarray(NULL, l + 1, sizeof(*tprog));
110			if (tprog == NULL)
111			return 0;
112			(void) wcsncpy(tprog, argv[0], l);
113			tprog[l] = '\0';
114			ptr++;
115			l = el_match(el->el_prog, tprog);
116			free(tprog);
117			if (!l)
118			return 0;
119			} else
120			ptr = argv[0];
121
122			for (i = 0; cmds[i].name != NULL; i++)
123			if (wcscmp(cmds[i].name, ptr) == 0) {
124			i = (*cmds[i].func) (el, argc, argv);
125			return -i;
126			}
127			return -1;
128			}
129
130
131			/* parse__escape():
132			* Parse a string of the form ^<char> \<odigit> \<char> \U+xxxx and return
133			* the appropriate character or -1 if the escape is not valid
134			*/
135			protected int
136			parse__escape(const wchar_t **ptr)
137			{
138			const wchar_t *p;
139			wint_t c;
140
141		12	p = *ptr;
142
143	✗✓	6	if (p[1] == 0)
144			return -1;
145
146	✗✓	6	if (*p == '\\') {
147			p++;
148			switch (*p) {
149			case 'a':
150			c = '\007'; /* Bell */
151			break;
152			case 'b':
153			c = '\010'; /* Backspace */
154			break;
155			case 't':
156			c = '\011'; /* Horizontal Tab */
157			break;
158			case 'n':
159			c = '\012'; /* New Line */
160			break;
161			case 'v':
162			c = '\013'; /* Vertical Tab */
163			break;
164			case 'f':
165			c = '\014'; /* Form Feed */
166			break;
167			case 'r':
168			c = '\015'; /* Carriage Return */
169			break;
170			case 'e':
171			c = '\033'; /* Escape */
172			break;
173			case 'U': /* Unicode \U+xxxx or \U+xxxxx format */
174			{
175			int i;
176			const wchar_t hex[] = L"0123456789ABCDEF";
177			const wchar_t *h;
178			++p;
179			if (*p++ != '+')
180			return -1;
181			c = 0;
182			for (i = 0; i < 5; ++i) {
183			h = wcschr(hex, *p++);
184			if (!h && i < 4)
185			return -1;
186			else if (h)
187			c = (c << 4) \| ((int)(h - hex));
188			else
189			--p;
190			}
191			if (c > 0x10FFFF) /* outside valid character range */
192			return -1;
193			break;
194			}
195			case '0':
196			case '1':
197			case '2':
198			case '3':
199			case '4':
200			case '5':
201			case '6':
202			case '7':
203			{
204			int cnt, ch;
205
206			for (cnt = 0, c = 0; cnt < 3; cnt++) {
207			ch = *p++;
208			if (ch < '0' \|\| ch > '7') {
209			p--;
210			break;
211			}
212			c = (c << 3) \| (ch - '0');
213			}
214			if ((c & 0xffffff00) != 0)
215			return -1;
216			--p;
217			break;
218			}
219			default:
220			c = *p;
221			break;
222			}
223	✓✗	6	} else if (*p == '^') {
224		6	p++;
225	✓✗	18	c = (p == '?') ? '\177' : (p & 0237);
226		6	} else
227			c = *p;
228		6	*ptr = ++p;
229		6	return c;
230		6	}
231
232			/* parse__string():
233			* Parse the escapes from in and put the raw string out
234			*/
235			protected wchar_t *
236			parse__string(wchar_t out, const wchar_t in)
237			{
238			wchar_t *rv = out;
239			int n;
240
241		12	for (;;)
242	✓✗✓✗ ✗	12	switch (*in) {
243			case '\0':
244		6	*out = '\0';
245		6	return rv;
246
247			case '\\':
248			case '^':
249	✗✓	6	if ((n = parse__escape(&in)) == -1)
250			return NULL;
251		6	*out++ = (wchar_t)n;
252		6	break;
253
254			case 'M':
255			if (in[1] == '-' && in[2] != '\0') {
256			*out++ = '\033';
257			in += 2;
258			break;
259			}
260			/FALLTHROUGH/
261
262			default:
263			out++ = in++;
264			break;
265			}
266		6	}
267
268
269			/* parse_cmd():
270			* Return the command number for the command string given
271			* or -1 if one is not found
272			*/
273			protected int
274			parse_cmd(EditLine el, const wchar_t cmd)
275			{
276			el_bindings_t *b;
277			int i;
278
279	✓✗	1176	for (b = el->el_map.help, i = 0; i < el->el_map.nfunc; i++)
280	✓✓	585	if (wcscmp(b[i].name, cmd) == 0)
281		6	return b[i].func;
282			return -1;
283		6	}