From d6583bb2a13f329cf0332ef2570eb8bb8fc0e39c Mon Sep 17 00:00:00 2001 From: Theo de Raadt Date: Wed, 18 Oct 1995 08:53:40 +0000 Subject: initial import of NetBSD tree --- lib/libedit/tokenizer.c | 385 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 385 insertions(+) create mode 100644 lib/libedit/tokenizer.c (limited to 'lib/libedit/tokenizer.c') diff --git a/lib/libedit/tokenizer.c b/lib/libedit/tokenizer.c new file mode 100644 index 00000000000..41095fa980f --- /dev/null +++ b/lib/libedit/tokenizer.c @@ -0,0 +1,385 @@ +/*- + * 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. + */ + +#if !defined(lint) && !defined(SCCSID) +static char sccsid[] = "@(#)tokenizer.c 8.1 (Berkeley) 6/4/93"; +#endif /* not lint && not SCCSID */ + +/* + * tokenize.c: Bourne shell like tokenizer + */ +#include "sys.h" +#include +#include +#include "tokenizer.h" + +typedef enum { Q_none, Q_single, Q_double, Q_one, Q_doubleone } quote_t; + +#define IFS "\t \n" + +#define TOK_KEEP 1 +#define TOK_EAT 2 + +#define WINCR 20 +#define AINCR 10 + +#define tok_malloc(a) malloc(a) +#define tok_free(a) free(a) +#define tok_realloc(a, b) realloc(a, b) + + +struct tokenizer { + char *ifs; /* In field separator */ + int 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 tok_finish __P((Tokenizer *)); + + +/* tok_finish(): + * Finish a word in the tokenizer. + */ +private void +tok_finish(tok) + 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; +} + + +/* tok_init(): + * Initialize the tokenizer + */ +public Tokenizer * +tok_init(ifs) + const char *ifs; +{ + Tokenizer* tok = (Tokenizer*) tok_malloc(sizeof(Tokenizer)); + + tok->ifs = strdup(ifs ? ifs : IFS); + tok->argc = 0; + tok->amax = AINCR; + tok->argv = (char **) tok_malloc(sizeof(char *) * tok->amax); + tok->argv[0] = NULL; + tok->wspace = (char *) tok_malloc(WINCR); + tok->wmax = tok->wspace + WINCR; + tok->wstart = tok->wspace; + tok->wptr = tok->wspace; + tok->flags = 0; + tok->quote = Q_none; + + return tok; +} + + +/* tok_reset(): + * Reset the tokenizer + */ +public void +tok_reset(tok) + Tokenizer *tok; +{ + tok->argc = 0; + tok->wstart = tok->wspace; + tok->wptr = tok->wspace; + tok->flags = 0; + tok->quote = Q_none; +} + + +/* tok_end(): + * Clean up + */ +public void +tok_end(tok) + Tokenizer *tok; +{ + tok_free((ptr_t) tok->ifs); + tok_free((ptr_t) tok->wspace); + tok_free((ptr_t) tok->argv); + tok_free((ptr_t) tok); +} + + + +/* tok_line(): + * Bourne shell like tokenizing + * Return: + * -1: Internal error + * 3: Quoted return + * 2: Unmatched double quote + * 1: Unmatched single quote + * 0: Ok + */ +public int +tok_line(tok, line, argc, argv) + Tokenizer *tok; + const char* line; + int *argc; + char ***argv; +{ + const char *ptr; + + while (1) { + switch (*(ptr = line++)) { + 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: + tok->quote = Q_none; /* Exit double quote mode */ + 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: + tok->quote = Q_doubleone;/* Quote next character */ + break; + + case Q_one: + *tok->wptr++ = *ptr; + tok->quote = Q_none; /* Quote this, restore state */ + 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: + tok_finish(tok); + *argv = tok->argv; + *argc = tok->argc; + return(0); + + case Q_single: + case Q_double: + *tok->wptr++ = *ptr; /* Add the return */ + break; + + case Q_doubleone: + tok->flags |= TOK_EAT; + tok->quote = Q_double; /* Back to double, eat the '\n' */ + break; + + case Q_one: + tok->flags |= TOK_EAT; + tok->quote = Q_none; /* No quote, more eat the '\n' */ + 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; + } + tok_finish(tok); + *argv = tok->argv; + *argc = tok->argc; + return(0); + + 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) + 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 = tok->wmax - tok->wspace + WINCR; + char *s = (char *) tok_realloc(tok->wspace, size); + /*SUPPRESS 22*/ + int offs = s - tok->wspace; + + if (offs != 0) { + int i; + for (i = 0; i < tok->argc; i++) + tok->argv[i] = tok->argv[i] + offs; + tok->wptr = tok->wptr + offs; + tok->wstart = tok->wstart + offs; + tok->wmax = s + size; + tok->wspace = s; + } + } + + if (tok->argc >= tok->amax - 4) { + tok->amax += AINCR; + tok->argv = (char **) tok_realloc(tok->argv, + tok->amax * sizeof(char*)); + } + + } +} -- cgit v1.2.3