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2006-01-04 Gregory Pietsch <gpietsch@comcast.net> 

* libc/stdlib/getopt.c: Replaced with version
        that adds getopt_long and getopt_long_only support.
        * libc/include/getopt.h: New file.
This commit is contained in:
Jeff Johnston 2006-01-04 21:21:52 +00:00
parent 4b2985b50b
commit 791c9bda57
3 changed files with 538 additions and 107 deletions
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6
newlib/ChangeLog
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@ -1,3 +1,9 @@
2006-01-04 Gregory Pietsch <gpietsch@comcast.net>
* libc/stdlib/getopt.c: Replaced with version
that adds getopt_long and getopt_long_only support.
* libc/include/getopt.h: New file.
2005-12-16 Jeff Johnston <jjohnstn@redhat.com> 2005-12-16 Jeff Johnston <jjohnstn@redhat.com>
* NEWS: Update with 1.14.0 info. * NEWS: Update with 1.14.0 info.

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/****************************************************************************
getopt.h - Read command line options
AUTHOR: Gregory Pietsch
CREATED Thu Jan 09 22:37:00 1997
DESCRIPTION:
The getopt() function parses the command line arguments. Its arguments argc
and argv are the argument count and array as passed to the main() function
on program invocation. The argument optstring is a list of available option
characters. If such a character is followed by a colon (`:'), the option
takes an argument, which is placed in optarg. If such a character is
followed by two colons, the option takes an optional argument, which is
placed in optarg. If the option does not take an argument, optarg is NULL.
The external variable optind is the index of the next array element of argv
to be processed; it communicates from one call to the next which element to
process.
The getopt_long() function works like getopt() except that it also accepts
long options started by two dashes `--'. If these take values, it is either
in the form
--arg=value
or
--arg value
It takes the additional arguments longopts which is a pointer to the first
element of an array of type GETOPT_LONG_OPTION_T, defined below. The last
element of the array has to be filled with NULL for the name field.
The longind pointer points to the index of the current long option relative
to longopts if it is non-NULL.
The getopt() function returns the option character if the option was found
successfully, `:' if there was a missing parameter for one of the options,
`?' for an unknown option character, and EOF for the end of the option list.
The getopt_long() function's return value is described below.
The function getopt_long_only() is identical to getopt_long(), except that a
plus sign `+' can introduce long options as well as `--'.
Describe how to deal with options that follow non-option ARGV-elements.
If the caller did not specify anything, the default is REQUIRE_ORDER if the
environment variable POSIXLY_CORRECT is defined, PERMUTE otherwise.
REQUIRE_ORDER means don't recognize them as options; stop option processing
when the first non-option is seen. This is what Unix does. This mode of
operation is selected by either setting the environment variable
POSIXLY_CORRECT, or using `+' as the first character of the optstring
parameter.
PERMUTE is the default. We permute the contents of ARGV as we scan, so that
eventually all the non-options are at the end. This allows options to be
given in any order, even with programs that were not written to expect this.
RETURN_IN_ORDER is an option available to programs that were written to
expect options and other ARGV-elements in any order and that care about the
ordering of the two. We describe each non-option ARGV-element as if it were
the argument of an option with character code 1. Using `-' as the first
character of the optstring parameter selects this mode of operation.
The special argument `--' forces an end of option-scanning regardless of the
value of `ordering'. In the case of RETURN_IN_ORDER, only `--' can cause
getopt() and friends to return EOF with optind != argc.
COPYRIGHT NOTICE AND DISCLAIMER:
Copyright (C) 1997 Gregory Pietsch
This file and the accompanying getopt.c implementation file are hereby
placed in the public domain without restrictions. Just give the author
credit, don't claim you wrote it or prevent anyone else from using it.
Gregory Pietsch's current e-mail address:
gpietsch@comcast.net
****************************************************************************/
#ifndef GETOPT_H
#define GETOPT_H
#include <_ansi.h>
/* include files needed by this include file */
/* macros defined by this include file */
#define NO_ARG 0
#define REQUIRED_ARG 1
#define OPTIONAL_ARG 2
/* types defined by this include file */
struct option
{
char *name; /* the name of the long option */
int has_arg; /* one of the above macros */
int *flag; /* determines if getopt_long() returns a
* value for a long option; if it is
* non-NULL, 0 is returned as a function
* value and the value of val is stored in
* the area pointed to by flag. Otherwise,
* val is returned. */
int val; /* determines the value to return if flag is
* NULL. */
};
#ifdef __cplusplus
extern "C"
{
#endif
/* externally-defined variables */
extern char *optarg;
extern int optind;
extern int opterr;
extern int optopt;
/* function prototypes */
int _EXFUN (getopt, (int __argc, char *const __argv[], const char *__optstring));
int _EXFUN (getopt_long, (int __argc, char *const __argv[], const char *__shortopts, const struct option *__longopts, int *__longind));
int _EXFUN (getopt_long_only, (int __argc, char *const __argv[], const char *__shortopts, const struct option *__longopts, int *__longind));
#ifdef __cplusplus
};
#endif
#endif /* GETOPT_H */
/* END OF FILE getopt.h */

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newlib/libc/stdlib/getopt.c
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@ -1,117 +1,406 @@
/* /****************************************************************************
* Copyright (c) 1987, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* 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(LIBC_SCCS) && !defined(lint) getopt.c - Read command line options
/* static char sccsid[] = "from: @(#)getopt.c 8.2 (Berkeley) 4/2/94"; */
static char *rcsid = "$Id$";
#endif /* LIBC_SCCS and not lint */
AUTHOR: Gregory Pietsch
CREATED Fri Jan 10 21:13:05 1997
DESCRIPTION:
The getopt() function parses the command line arguments. Its arguments argc
and argv are the argument count and array as passed to the main() function
on program invocation. The argument optstring is a list of available option
characters. If such a character is followed by a colon (`:'), the option
takes an argument, which is placed in optarg. If such a character is
followed by two colons, the option takes an optional argument, which is
placed in optarg. If the option does not take an argument, optarg is NULL.
The external variable optind is the index of the next array element of argv
to be processed; it communicates from one call to the next which element to
process.
The getopt_long() function works like getopt() except that it also accepts
long options started by two dashes `--'. If these take values, it is either
in the form
--arg=value
or
--arg value
It takes the additional arguments longopts which is a pointer to the first
element of an array of type struct option. The last element of the array
has to be filled with NULL for the name field.
The longind pointer points to the index of the current long option relative
to longopts if it is non-NULL.
The getopt() function returns the option character if the option was found
successfully, `:' if there was a missing parameter for one of the options,
`?' for an unknown option character, and EOF for the end of the option list.
The getopt_long() function's return value is described in the header file.
The function getopt_long_only() is identical to getopt_long(), except that a
plus sign `+' can introduce long options as well as `--'.
The following describes how to deal with options that follow non-option
argv-elements.
If the caller did not specify anything, the default is REQUIRE_ORDER if the
environment variable POSIXLY_CORRECT is defined, PERMUTE otherwise.
REQUIRE_ORDER means don't recognize them as options; stop option processing
when the first non-option is seen. This is what Unix does. This mode of
operation is selected by either setting the environment variable
POSIXLY_CORRECT, or using `+' as the first character of the optstring
parameter.
PERMUTE is the default. We permute the contents of ARGV as we scan, so that
eventually all the non-options are at the end. This allows options to be
given in any order, even with programs that were not written to expect this.
RETURN_IN_ORDER is an option available to programs that were written to
expect options and other argv-elements in any order and that care about the
ordering of the two. We describe each non-option argv-element as if it were
the argument of an option with character code 1. Using `-' as the first
character of the optstring parameter selects this mode of operation.
The special argument `--' forces an end of option-scanning regardless of the
value of ordering. In the case of RETURN_IN_ORDER, only `--' can cause
getopt() and friends to return EOF with optind != argc.
COPYRIGHT NOTICE AND DISCLAIMER:
Copyright (C) 1997 Gregory Pietsch
This file and the accompanying getopt.h header file are hereby placed in the
public domain without restrictions. Just give the author credit, don't
claim you wrote it or prevent anyone else from using it.
Gregory Pietsch's current e-mail address:
gpietsch@comcast.net
****************************************************************************/
/* include files */
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <getopt.h>
int opterr = 1, /* if error message should be printed */ /* macros */
optind = 1, /* index into parent argv vector */
optopt, /* character checked for validity */
optreset; /* reset getopt */
char *optarg; /* argument associated with option */
#define BADCH (int)'?' /* types */
#define BADARG (int)':' typedef enum GETOPT_ORDERING_T
#define EMSG ""
/*
* getopt --
* Parse argc/argv argument vector.
*/
int
getopt(nargc, nargv, ostr)
int nargc;
char * const *nargv;
const char *ostr;
{ {
static char *place = EMSG; /* option letter processing */ PERMUTE,
char *oli; /* option letter list index */ RETURN_IN_ORDER,
REQUIRE_ORDER
} GETOPT_ORDERING_T;
if (optreset || !*place) { /* update scanning pointer */ /* globally-defined variables */
optreset = 0; char *optarg = NULL;
if (optind >= nargc || *(place = nargv[optind]) != '-') { int optind = 0;
place = EMSG; int opterr = 1;
return (-1); int optopt = '?';
/* functions */
/* reverse_argv_elements: reverses num elements starting at argv */
static void
reverse_argv_elements (char ** argv, int num)
{
int i;
char *tmp;
for (i = 0; i < (num >> 1); i++)
{
tmp = argv[i];
argv[i] = argv[num - i - 1];
argv[num - i - 1] = tmp;
} }
if (place[1] && *++place == '-') { /* found "--" */
++optind;
place = EMSG;
return (-1);
}
} /* option letter okay? */
if ((optopt = (int)*place++) == (int)':' ||
!(oli = strchr(ostr, optopt))) {
/*
* if the user didn't specify '-' as an option,
* assume it means -1.
*/
if (optopt == (int)'-')
return (-1);
if (!*place)
++optind;
if (opterr && *ostr != ':')
(void)fprintf(stderr,
"%s: illegal option -- %c\n", nargv[0], optopt);
return (BADCH);
}
if (*++oli != ':') { /* don't need argument */
optarg = NULL;
if (!*place)
++optind;
}
else { /* need an argument */
if (*place) /* no white space */
optarg = place;
else if (nargc <= ++optind) { /* no arg */
place = EMSG;
if (*ostr == ':')
return (BADARG);
if (opterr)
(void)fprintf(stderr,
"%s: option requires an argument -- %c\n",
nargv[0], optopt);
return (BADCH);
}
else /* white space */
optarg = nargv[optind];
place = EMSG;
++optind;
}
return (optopt); /* dump back option letter */
} }
/* permute: swap two blocks of argv-elements given their lengths */
static void
permute (char *const argv[], int len1, int len2)
{
reverse_argv_elements ((char **)argv, len1);
reverse_argv_elements ((char **)argv, len1 + len2);
reverse_argv_elements ((char **)argv, len2);
}
/* is_option: is this argv-element an option or the end of the option list? */
static int
is_option (char *argv_element, int only)
{
return ((argv_element == NULL)
|| (argv_element[0] == '-') || (only && argv_element[0] == '+'));
}
/* getopt_internal: the function that does all the dirty work */
static int
getopt_internal (int argc, char *const argv[], const char *shortopts,
const struct option *longopts, int *longind, int only)
{
GETOPT_ORDERING_T ordering = PERMUTE;
static size_t optwhere = 0;
size_t permute_from = 0;
int num_nonopts = 0;
int optindex = 0;
size_t match_chars = 0;
char *possible_arg = NULL;
int longopt_match = -1;
int has_arg = -1;
char *cp;
int arg_next = 0;
/* first, deal with silly parameters and easy stuff */
if (argc == 0 || argv == NULL || (shortopts == NULL && longopts == NULL))
return EOF;
if (optind >= argc || argv[optind] == NULL)
return EOF;
if (strcmp (argv[optind], "--") == 0)
{
optind++;
return EOF;
}
/* if this is our first time through */
if (optind == 0)
optind = optwhere = 1;
/* define ordering */
if (shortopts != NULL && (*shortopts == '-' || *shortopts == '+'))
{
ordering = (*shortopts == '-') ? RETURN_IN_ORDER : REQUIRE_ORDER;
shortopts++;
}
else
ordering = (getenv ("POSIXLY_CORRECT") != NULL) ? REQUIRE_ORDER : PERMUTE;
/*
* based on ordering, find our next option, if we're at the beginning of
* one
*/
if (optwhere == 1)
{
switch (ordering)
{
case PERMUTE:
permute_from = optind;
num_nonopts = 0;
while (!is_option (argv[optind], only))
{
optind++;
num_nonopts++;
}
if (argv[optind] == NULL)
{
/* no more options */
optind = permute_from;
return EOF;
}
else if (strcmp (argv[optind], "--") == 0)
{
/* no more options, but have to get `--' out of the way */
permute (argv + permute_from, num_nonopts, 1);
optind = permute_from + 1;
return EOF;
}
break;
case RETURN_IN_ORDER:
if (!is_option (argv[optind], only))
{
optarg = argv[optind++];
return (optopt = 1);
}
break;
case REQUIRE_ORDER:
if (!is_option (argv[optind], only))
return EOF;
break;
}
}
/* we've got an option, so parse it */
/* first, is it a long option? */
if (longopts != NULL
&& (memcmp (argv[optind], "--", 2) == 0
|| (only && argv[optind][0] == '+')) && optwhere == 1)
{
/* handle long options */
if (memcmp (argv[optind], "--", 2) == 0)
optwhere = 2;
longopt_match = -1;
possible_arg = strchr (argv[optind] + optwhere, '=');
if (possible_arg == NULL)
{
/* no =, so next argv might be arg */
match_chars = strlen (argv[optind]);
possible_arg = argv[optind] + match_chars;
match_chars = match_chars - optwhere;
}
else
match_chars = (possible_arg - argv[optind]) - optwhere;
for (optindex = 0; longopts[optindex].name != NULL; optindex++)
{
if (memcmp (argv[optind] + optwhere,
longopts[optindex].name, match_chars) == 0)
{
/* do we have an exact match? */
if (match_chars == (int) (strlen (longopts[optindex].name)))
{
longopt_match = optindex;
break;
}
/* do any characters match? */
else
{
if (longopt_match < 0)
longopt_match = optindex;
else
{
/* we have ambiguous options */
if (opterr)
fprintf (stderr, "%s: option `%s' is ambiguous "
"(could be `--%s' or `--%s')\n",
argv[0],
argv[optind],
longopts[longopt_match].name,
longopts[optindex].name);
return (optopt = '?');
}
}
}
}
if (longopt_match >= 0)
has_arg = longopts[longopt_match].has_arg;
}
/* if we didn't find a long option, is it a short option? */
if (longopt_match < 0 && shortopts != NULL)
{
cp = strchr (shortopts, argv[optind][optwhere]);
if (cp == NULL)
{
/* couldn't find option in shortopts */
if (opterr)
fprintf (stderr,
"%s: invalid option -- `-%c'\n",
argv[0], argv[optind][optwhere]);
optwhere++;
if (argv[optind][optwhere] == '\0')
{
optind++;
optwhere = 1;
}
return (optopt = '?');
}
has_arg = ((cp[1] == ':')
? ((cp[2] == ':') ? OPTIONAL_ARG : REQUIRED_ARG) : NO_ARG);
possible_arg = argv[optind] + optwhere + 1;
optopt = *cp;
}
/* get argument and reset optwhere */
arg_next = 0;
switch (has_arg)
{
case OPTIONAL_ARG:
if (*possible_arg == '=')
possible_arg++;
if (*possible_arg != '\0')
{
optarg = possible_arg;
optwhere = 1;
}
else
optarg = NULL;
break;
case REQUIRED_ARG:
if (*possible_arg == '=')
possible_arg++;
if (*possible_arg != '\0')
{
optarg = possible_arg;
optwhere = 1;
}
else if (optind + 1 >= argc)
{
if (opterr)
{
fprintf (stderr, "%s: argument required for option `", argv[0]);
if (longopt_match >= 0)
fprintf (stderr, "--%s'\n", longopts[longopt_match].name);
else
fprintf (stderr, "-%c'\n", *cp);
}
optind++;
return (optopt = ':');
}
else
{
optarg = argv[optind + 1];
arg_next = 1;
optwhere = 1;
}
break;
case NO_ARG:
if (longopt_match < 0)
{
optwhere++;
if (argv[optind][optwhere] == '\0')
optwhere = 1;
}
else
optwhere = 1;
optarg = NULL;
break;
}
/* do we have to permute or otherwise modify optind? */
if (ordering == PERMUTE && optwhere == 1 && num_nonopts != 0)
{
permute (argv + permute_from, num_nonopts, 1 + arg_next);
optind = permute_from + 1 + arg_next;
}
else if (optwhere == 1)
optind = optind + 1 + arg_next;
/* finally return */
if (longopt_match >= 0)
{
if (longind != NULL)
*longind = longopt_match;
if (longopts[longopt_match].flag != NULL)
{
*(longopts[longopt_match].flag) = longopts[longopt_match].val;
return 0;
}
else
return longopts[longopt_match].val;
}
else
return optopt;
}
int
getopt (int argc, char *const argv[], const char *optstring)
{
return getopt_internal (argc, argv, optstring, NULL, NULL, 0);
}
int
getopt_long (int argc, char *const argv[], const char *shortopts,
const struct option *longopts, int *longind)
{
return getopt_internal (argc, argv, shortopts, longopts, longind, 0);
}
int
getopt_long_only (int argc, char *const argv[], const char *shortopts,
const struct option *longopts, int *longind)
{
return getopt_internal (argc, argv, shortopts, longopts, longind, 1);
}
/* end of file GETOPT.C */