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+/* $NetBSD: tokenizer.c,v 1.21 2011/08/16 16:25:15 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.
+ */
+
+#ifndef NARROWCHAR
+#include "config.h"
+#endif
+
+#if !defined(lint) && !defined(SCCSID)
+#if 0
+static char sccsid[] = "@(#)tokenizer.c 8.1 (Berkeley) 6/4/93";
+#else
+__RCSID("$NetBSD: tokenizer.c,v 1.21 2011/08/16 16:25:15 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 <string.h>
+#include <stdlib.h>
+#include "histedit.h"
+#include "chartype.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)
+#define tok_strdup(a) Strdup(a)
+
+
+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; */
+};
+
+
+private void FUN(tok,finish)(TYPE(Tokenizer) *);
+
+
+/* FUN(tok,finish)():
+ * Finish a word in the tokenizer.
+ */
+private 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
+ */
+public 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
+ */
+public 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
+ */
+public 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
+ */
+public 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)
+ 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.
+ */
+public 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));
+}
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