1 files changed, 466 insertions, 0 deletions

diff --git a/bin/cash/libedit/tokenizer.c b/bin/cash/libedit/tokenizer.c
new file mode 100644
index 00000000..18532240
--- /dev/null
+++ b/bin/cash/libedit/tokenizer.c
@@ -0,0 +1,466 @@
+/*	$NetBSD: tokenizer.c,v 1.28 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"
+#if !defined(lint) && !defined(SCCSID)
+#if 0
+static char sccsid[] = "@(#)tokenizer.c	8.1 (Berkeley) 6/4/93";
+#else
+__RCSID("$NetBSD: tokenizer.c,v 1.28 2016/04/11 18:56:31 christos Exp $");
+#endif
+#endif /* not lint && not SCCSID */
+
+/* We build this file twice, once as NARROW, once as WIDE. */
+/*
+ * tokenize.c: Bourne shell like tokenizer
+ */
+#include <stdlib.h>
+#include <string.h>
+
+#include "histedit.h"
+
+typedef enum {
+	Q_none, Q_single, Q_double, Q_one, Q_doubleone
+} quote_t;
+
+#define	TOK_KEEP	1
+#define	TOK_EAT		2
+
+#define	WINCR		20
+#define	AINCR		10
+
+#define	IFS		STR("\t \n")
+
+#define	tok_malloc(a)		malloc(a)
+#define	tok_free(a)		free(a)
+#define	tok_realloc(a, b)	realloc(a, b)
+
+#ifdef NARROWCHAR
+#define	Char			char
+#define	FUN(prefix, rest)	prefix ## _ ## rest
+#define	TYPE(type)		type
+#define	STR(x)			x
+#define	Strchr(s, c)		strchr(s, c)
+#define	tok_strdup(s)		strdup(s)
+#else
+#define	Char			wchar_t
+#define	FUN(prefix, rest)	prefix ## _w ## rest
+#define	TYPE(type)		type ## W
+#define	STR(x)			L ## x
+#define	Strchr(s, c)		wcschr(s, c)
+#define	tok_strdup(s)		wcsdup(s)
+#endif
+
+struct TYPE(tokenizer) {
+	Char	*ifs;		/* In field separator			 */
+	size_t	 argc, amax;	/* Current and maximum number of args	 */
+	Char   **argv;		/* Argument list			 */
+	Char	*wptr, *wmax;	/* Space and limit on the word buffer	 */
+	Char	*wstart;	/* Beginning of next word		 */
+	Char	*wspace;	/* Space of word buffer			 */
+	quote_t	 quote;		/* Quoting state			 */
+	int	 flags;		/* flags;				 */
+};
+
+
+static void FUN(tok,finish)(TYPE(Tokenizer) *);
+
+
+/* FUN(tok,finish)():
+ *	Finish a word in the tokenizer.
+ */
+static void
+FUN(tok,finish)(TYPE(Tokenizer) *tok)
+{
+
+	*tok->wptr = '\0';
+	if ((tok->flags & TOK_KEEP) || tok->wptr != tok->wstart) {
+		tok->argv[tok->argc++] = tok->wstart;
+		tok->argv[tok->argc] = NULL;
+		tok->wstart = ++tok->wptr;
+	}
+	tok->flags &= ~TOK_KEEP;
+}
+
+
+/* FUN(tok,init)():
+ *	Initialize the tokenizer
+ */
+TYPE(Tokenizer) *
+FUN(tok,init)(const Char *ifs)
+{
+	TYPE(Tokenizer) *tok = tok_malloc(sizeof(*tok));
+
+	if (tok == NULL)
+		return NULL;
+	tok->ifs = tok_strdup(ifs ? ifs : IFS);
+	if (tok->ifs == NULL) {
+		tok_free(tok);
+		return NULL;
+	}
+	tok->argc = 0;
+	tok->amax = AINCR;
+	tok->argv = tok_malloc(sizeof(*tok->argv) * tok->amax);
+	if (tok->argv == NULL) {
+		tok_free(tok->ifs);
+		tok_free(tok);
+		return NULL;
+	}
+	tok->argv[0] = NULL;
+	tok->wspace = tok_malloc(WINCR * sizeof(*tok->wspace));
+	if (tok->wspace == NULL) {
+		tok_free(tok->argv);
+		tok_free(tok->ifs);
+		tok_free(tok);
+		return NULL;
+	}
+	tok->wmax = tok->wspace + WINCR;
+	tok->wstart = tok->wspace;
+	tok->wptr = tok->wspace;
+	tok->flags = 0;
+	tok->quote = Q_none;
+
+	return tok;
+}
+
+
+/* FUN(tok,reset)():
+ *	Reset the tokenizer
+ */
+void
+FUN(tok,reset)(TYPE(Tokenizer) *tok)
+{
+
+	tok->argc = 0;
+	tok->wstart = tok->wspace;
+	tok->wptr = tok->wspace;
+	tok->flags = 0;
+	tok->quote = Q_none;
+}
+
+
+/* FUN(tok,end)():
+ *	Clean up
+ */
+void
+FUN(tok,end)(TYPE(Tokenizer) *tok)
+{
+
+	tok_free(tok->ifs);
+	tok_free(tok->wspace);
+	tok_free(tok->argv);
+	tok_free(tok);
+}
+
+
+
+/* FUN(tok,line)():
+ *	Bourne shell (sh(1)) like tokenizing
+ *	Arguments:
+ *		tok	current tokenizer state (setup with FUN(tok,init)())
+ *		line	line to parse
+ *	Returns:
+ *		-1	Internal error
+ *		 3	Quoted return
+ *		 2	Unmatched double quote
+ *		 1	Unmatched single quote
+ *		 0	Ok
+ *	Modifies (if return value is 0):
+ *		argc	number of arguments
+ *		argv	argument array
+ *		cursorc	if !NULL, argv element containing cursor
+ *		cursorv	if !NULL, offset in argv[cursorc] of cursor
+ */
+int
+FUN(tok,line)(TYPE(Tokenizer) *tok, const TYPE(LineInfo) *line,
+    int *argc, const Char ***argv, int *cursorc, int *cursoro)
+{
+	const Char *ptr;
+	int cc, co;
+
+	cc = co = -1;
+	ptr = line->buffer;
+	for (ptr = line->buffer; ;ptr++) {
+		if (ptr >= line->lastchar)
+			ptr = STR("");
+		if (ptr == line->cursor) {
+			cc = (int)tok->argc;
+			co = (int)(tok->wptr - tok->wstart);
+		}
+		switch (*ptr) {
+		case '\'':
+			tok->flags |= TOK_KEEP;
+			tok->flags &= ~TOK_EAT;
+			switch (tok->quote) {
+			case Q_none:
+				tok->quote = Q_single;	/* Enter single quote
+							 * mode */
+				break;
+
+			case Q_single:	/* Exit single quote mode */
+				tok->quote = Q_none;
+				break;
+
+			case Q_one:	/* Quote this ' */
+				tok->quote = Q_none;
+				*tok->wptr++ = *ptr;
+				break;
+
+			case Q_double:	/* Stay in double quote mode */
+				*tok->wptr++ = *ptr;
+				break;
+
+			case Q_doubleone:	/* Quote this ' */
+				tok->quote = Q_double;
+				*tok->wptr++ = *ptr;
+				break;
+
+			default:
+				return -1;
+			}
+			break;
+
+		case '"':
+			tok->flags &= ~TOK_EAT;
+			tok->flags |= TOK_KEEP;
+			switch (tok->quote) {
+			case Q_none:	/* Enter double quote mode */
+				tok->quote = Q_double;
+				break;
+
+			case Q_double:	/* Exit double quote mode */
+				tok->quote = Q_none;
+				break;
+
+			case Q_one:	/* Quote this " */
+				tok->quote = Q_none;
+				*tok->wptr++ = *ptr;
+				break;
+
+			case Q_single:	/* Stay in single quote mode */
+				*tok->wptr++ = *ptr;
+				break;
+
+			case Q_doubleone:	/* Quote this " */
+				tok->quote = Q_double;
+				*tok->wptr++ = *ptr;
+				break;
+
+			default:
+				return -1;
+			}
+			break;
+
+		case '\\':
+			tok->flags |= TOK_KEEP;
+			tok->flags &= ~TOK_EAT;
+			switch (tok->quote) {
+			case Q_none:	/* Quote next character */
+				tok->quote = Q_one;
+				break;
+
+			case Q_double:	/* Quote next character */
+				tok->quote = Q_doubleone;
+				break;
+
+			case Q_one:	/* Quote this, restore state */
+				*tok->wptr++ = *ptr;
+				tok->quote = Q_none;
+				break;
+
+			case Q_single:	/* Stay in single quote mode */
+				*tok->wptr++ = *ptr;
+				break;
+
+			case Q_doubleone:	/* Quote this \ */
+				tok->quote = Q_double;
+				*tok->wptr++ = *ptr;
+				break;
+
+			default:
+				return -1;
+			}
+			break;
+
+		case '\n':
+			tok->flags &= ~TOK_EAT;
+			switch (tok->quote) {
+			case Q_none:
+				goto tok_line_outok;
+
+			case Q_single:
+			case Q_double:
+				*tok->wptr++ = *ptr;	/* Add the return */
+				break;
+
+			case Q_doubleone:   /* Back to double, eat the '\n' */
+				tok->flags |= TOK_EAT;
+				tok->quote = Q_double;
+				break;
+
+			case Q_one:	/* No quote, more eat the '\n' */
+				tok->flags |= TOK_EAT;
+				tok->quote = Q_none;
+				break;
+
+			default:
+				return 0;
+			}
+			break;
+
+		case '\0':
+			switch (tok->quote) {
+			case Q_none:
+				/* Finish word and return */
+				if (tok->flags & TOK_EAT) {
+					tok->flags &= ~TOK_EAT;
+					return 3;
+				}
+				goto tok_line_outok;
+
+			case Q_single:
+				return 1;
+
+			case Q_double:
+				return 2;
+
+			case Q_doubleone:
+				tok->quote = Q_double;
+				*tok->wptr++ = *ptr;
+				break;
+
+			case Q_one:
+				tok->quote = Q_none;
+				*tok->wptr++ = *ptr;
+				break;
+
+			default:
+				return -1;
+			}
+			break;
+
+		default:
+			tok->flags &= ~TOK_EAT;
+			switch (tok->quote) {
+			case Q_none:
+				if (Strchr(tok->ifs, *ptr) != NULL)
+					FUN(tok,finish)(tok);
+				else
+					*tok->wptr++ = *ptr;
+				break;
+
+			case Q_single:
+			case Q_double:
+				*tok->wptr++ = *ptr;
+				break;
+
+
+			case Q_doubleone:
+				*tok->wptr++ = '\\';
+				tok->quote = Q_double;
+				*tok->wptr++ = *ptr;
+				break;
+
+			case Q_one:
+				tok->quote = Q_none;
+				*tok->wptr++ = *ptr;
+				break;
+
+			default:
+				return -1;
+
+			}
+			break;
+		}
+
+		if (tok->wptr >= tok->wmax - 4) {
+			size_t size = (size_t)(tok->wmax - tok->wspace + WINCR);
+			Char *s = tok_realloc(tok->wspace,
+			    size * sizeof(*s));
+			if (s == NULL)
+				return -1;
+
+			if (s != tok->wspace) {
+				size_t i;
+				for (i = 0; i < tok->argc; i++) {
+				    tok->argv[i] =
+					(tok->argv[i] - tok->wspace) + s;
+				}
+				tok->wptr = (tok->wptr - tok->wspace) + s;
+				tok->wstart = (tok->wstart - tok->wspace) + s;
+				tok->wspace = s;
+			}
+			tok->wmax = s + size;
+		}
+		if (tok->argc >= tok->amax - 4) {
+			Char **p;
+			tok->amax += AINCR;
+			p = tok_realloc(tok->argv, tok->amax * sizeof(*p));
+			if (p == NULL) {
+				tok->amax -= AINCR;
+				return -1;
+			}
+			tok->argv = p;
+		}
+	}
+ tok_line_outok:
+	if (cc == -1 && co == -1) {
+		cc = (int)tok->argc;
+		co = (int)(tok->wptr - tok->wstart);
+	}
+	if (cursorc != NULL)
+		*cursorc = cc;
+	if (cursoro != NULL)
+		*cursoro = co;
+	FUN(tok,finish)(tok);
+	*argv = (const Char **)tok->argv;
+	*argc = (int)tok->argc;
+	return 0;
+}
+
+/* FUN(tok,str)():
+ *	Simpler version of tok_line, taking a NUL terminated line
+ *	and splitting into words, ignoring cursor state.
+ */
+int
+FUN(tok,str)(TYPE(Tokenizer) *tok, const Char *line, int *argc,
+    const Char ***argv)
+{
+	TYPE(LineInfo) li;
+
+	memset(&li, 0, sizeof(li));
+	li.buffer = line;
+	li.cursor = li.lastchar = Strchr(line, '\0');
+	return FUN(tok,line)(tok, &li, argc, argv, NULL, NULL);
+}