changes for readline/libedit configuration

cmd-line-utils/libedit/parse.c

@@ -0,0 +1,260 @@
+/*	$NetBSD: parse.c,v 1.14 2001/01/23 15:55:30 jdolecek 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. 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 "compat.h"
+#if !defined(lint) && !defined(SCCSID)
+#if 0
+static char sccsid[] = "@(#)parse.c	8.1 (Berkeley) 6/4/93";
+#else
+__RCSID("$NetBSD: parse.c,v 1.14 2001/01/23 15:55:30 jdolecek Exp $");
+#endif
+#endif /* not lint && not SCCSID */
+
+/*
+ * parse.c: parse an editline extended command
+ *
+ * commands are:
+ *
+ *	bind
+ *	echotc
+ *	edit
+ *	gettc
+ *	history
+ *	settc
+ *	setty
+ */
+#include "sys.h"
+#include "el.h"
+#include "tokenizer.h"
+#include <stdlib.h>
+
+private const struct {
+	const char *name;
+	int (*func)(EditLine *, int, const char **);
+} cmds[] = {
+	{ "bind",	map_bind	},
+	{ "echotc",	term_echotc	},
+	{ "edit",	el_editmode	},
+	{ "history",	hist_list	},
+	{ "telltc",	term_telltc	},
+	{ "settc",	term_settc	},
+	{ "setty",	tty_stty	},
+	{ NULL,		NULL		}
+};
+
+
+/* parse_line():
+ *	Parse a line and dispatch it
+ */
+protected int
+parse_line(EditLine *el, const char *line)
+{
+	const char **argv;
+	int argc;
+	Tokenizer *tok;
+
+	tok = tok_init(NULL);
+	tok_line(tok, line, &argc, &argv);
+	argc = el_parse(el, argc, argv);
+	tok_end(tok);
+	return (argc);
+}
+
+
+/* el_parse():
+ *	Command dispatcher
+ */
+public int
+el_parse(EditLine *el, int argc, const char *argv[])
+{
+	const char *ptr;
+	int i;
+
+	if (argc < 1)
+		return (-1);
+	ptr = strchr(argv[0], ':');
+	if (ptr != NULL) {
+		char *tprog;
+		size_t l;
+
+		if (ptr == argv[0])
+			return (0);
+		l = ptr - argv[0] - 1;
+		tprog = (char *) el_malloc(l + 1);
+		if (tprog == NULL)
+			return (0);
+		(void) strncpy(tprog, argv[0], l);
+		tprog[l] = '\0';
+		ptr++;
+		l = el_match(el->el_prog, tprog);
+		el_free(tprog);
+		if (!l)
+			return (0);
+	} else
+		ptr = argv[0];
+
+	for (i = 0; cmds[i].name != NULL; i++)
+		if (strcmp(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> and return
+ *	the appropriate character or -1 if the escape is not valid
+ */
+protected int
+parse__escape(const char **const ptr)
+{
+	const char *p;
+	int 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 '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 == '^' && isalpha((unsigned char) p[1])) {
+		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 char *
+parse__string(char *out, const char *in)
+{
+	char *rv = out;
+	int n;
+
+	for (;;)
+		switch (*in) {
+		case '\0':
+			*out = '\0';
+			return (rv);
+
+		case '\\':
+		case '^':
+			if ((n = parse__escape(&in)) == -1)
+				return (NULL);
+			*out++ = n;
+			break;
+
+		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 char *cmd)
+{
+	el_bindings_t *b;
+
+	for (b = el->el_map.help; b->name != NULL; b++)
+		if (strcmp(b->name, cmd) == 0)
+			return (b->func);
+	return (-1);
+}