"Keep this file name-space clean" means, talk to roland@gnu.ai.mit.edu
before changing it!
- Copyright (C) 1987, 88, 89, 90, 91, 1992 Free Software Foundation, Inc.
+ Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94
+ Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
-
+
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
-
+
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
\f
-/* AIX requires this to be the first thing in the file. */
-#ifdef __GNUC__
-#define alloca __builtin_alloca
-#else /* not __GNUC__ */
-#if defined (HAVE_ALLOCA_H) || (defined(sparc) && (defined(sun) || (!defined(USG) && !defined(SVR4) && !defined(__svr4__))))
-#include <alloca.h>
-#else
-#ifdef _AIX
- #pragma alloca
+/* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>.
+ Ditto for AIX 3.2 and <stdlib.h>. */
+#ifndef _NO_PROTO
+#define _NO_PROTO
+#endif
+
+#ifdef HAVE_CONFIG_H
+#if defined (emacs) || defined (CONFIG_BROKETS)
+/* We use <config.h> instead of "config.h" so that a compilation
+ using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
+ (which it would do because it found this file in $srcdir). */
+#include <config.h>
#else
-char *alloca ();
+#include "config.h"
+#endif
+#endif
+
+#ifndef __STDC__
+/* This is a separate conditional since some stdc systems
+ reject `defined (const)'. */
+#ifndef const
+#define const
+#endif
#endif
-#endif /* alloca.h */
-#endif /* not __GNUC__ */
#include <stdio.h>
+/* Comment out all this code if we are using the GNU C Library, and are not
+ actually compiling the library itself. This code is part of the GNU C
+ Library, but also included in many other GNU distributions. Compiling
+ and linking in this code is a waste when using the GNU C library
+ (especially if it is a shared library). Rather than having every GNU
+ program understand `configure --with-gnu-libc' and omit the object files,
+ it is simpler to just do this in the source for each such file. */
+
+#if defined (_LIBC) || !defined (__GNU_LIBRARY__)
+
+
/* This needs to come after some library #include
to get __GNU_LIBRARY__ defined. */
#ifdef __GNU_LIBRARY__
-#undef alloca
/* Don't include stdlib.h for non-GNU C libraries because some of them
contain conflicting prototypes for getopt. */
#include <stdlib.h>
-#else /* Not GNU C library. */
-#define __alloca alloca
#endif /* GNU C library. */
-#if !__STDC__
-#define const
-#endif
-
-/* If GETOPT_COMPAT is defined, `+' as well as `--' can introduce a
- long-named option. Because this is not POSIX.2 compliant, it is
- being phased out. */
-#define GETOPT_COMPAT
-
/* This version of `getopt' appears to the caller like standard Unix `getopt'
but it behaves differently for the user, since it allows the user
to intersperse the options with the other arguments.
Also, when `ordering' is RETURN_IN_ORDER,
each non-option ARGV-element is returned here. */
-char *optarg = 0;
+char *optarg = NULL;
/* Index in ARGV of the next element to be scanned.
This is used for communication to and from the caller
Otherwise, `optind' communicates from one call to the next
how much of ARGV has been scanned so far. */
+/* XXX 1003.2 says this must be 1 before any call. */
int optind = 0;
/* The next char to be scanned in the option-element
int opterr = 1;
+/* Set to an option character which was unrecognized.
+ This must be initialized on some systems to avoid linking in the
+ system's own getopt implementation. */
+
+int optopt = '?';
+
/* Describe how to deal with options that follow non-option ARGV-elements.
If the caller did not specify anything,
in GCC. */
#include <string.h>
#define my_index strchr
-#define my_bcopy(src, dst, n) memcpy ((dst), (src), (n))
#else
/* Avoid depending on library functions or files
char *getenv ();
static char *
-my_index (string, chr)
- char *string;
+my_index (str, chr)
+ const char *str;
int chr;
{
- while (*string)
+ while (*str)
{
- if (*string == chr)
- return string;
- string++;
+ if (*str == chr)
+ return (char *) str;
+ str++;
}
return 0;
}
-static void
-my_bcopy (from, to, size)
- char *from, *to;
- int size;
-{
- int i;
- for (i = 0; i < size; i++)
- to[i] = from[i];
-}
-#endif /* GNU C library. */
+/* If using GCC, we can safely declare strlen this way.
+ If not using GCC, it is ok not to declare it. */
+#ifdef __GNUC__
+/* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
+ That was relevant to code that was here before. */
+#ifndef __STDC__
+/* gcc with -traditional declares the built-in strlen to return int,
+ and has done so at least since version 2.4.5. -- rms. */
+extern int strlen (const char *);
+#endif /* not __STDC__ */
+#endif /* __GNUC__ */
+
+#endif /* not __GNU_LIBRARY__ */
\f
/* Handle permutation of arguments. */
exchange (argv)
char **argv;
{
- int nonopts_size = (last_nonopt - first_nonopt) * sizeof (char *);
- char **temp = (char **) __alloca (nonopts_size);
+ int bottom = first_nonopt;
+ int middle = last_nonopt;
+ int top = optind;
+ char *tem;
+
+ /* Exchange the shorter segment with the far end of the longer segment.
+ That puts the shorter segment into the right place.
+ It leaves the longer segment in the right place overall,
+ but it consists of two parts that need to be swapped next. */
- /* Interchange the two blocks of data in ARGV. */
+ while (top > middle && middle > bottom)
+ {
+ if (top - middle > middle - bottom)
+ {
+ /* Bottom segment is the short one. */
+ int len = middle - bottom;
+ register int i;
+
+ /* Swap it with the top part of the top segment. */
+ for (i = 0; i < len; i++)
+ {
+ tem = argv[bottom + i];
+ argv[bottom + i] = argv[top - (middle - bottom) + i];
+ argv[top - (middle - bottom) + i] = tem;
+ }
+ /* Exclude the moved bottom segment from further swapping. */
+ top -= len;
+ }
+ else
+ {
+ /* Top segment is the short one. */
+ int len = top - middle;
+ register int i;
- my_bcopy ((char *) &argv[first_nonopt], (char *) temp, nonopts_size);
- my_bcopy ((char *) &argv[last_nonopt], (char *) &argv[first_nonopt],
- (optind - last_nonopt) * sizeof (char *));
- my_bcopy ((char *) temp,
- (char *) &argv[first_nonopt + optind - last_nonopt],
- nonopts_size);
+ /* Swap it with the bottom part of the bottom segment. */
+ for (i = 0; i < len; i++)
+ {
+ tem = argv[bottom + i];
+ argv[bottom + i] = argv[middle + i];
+ argv[middle + i] = tem;
+ }
+ /* Exclude the moved top segment from further swapping. */
+ bottom += len;
+ }
+ }
/* Update records for the slots the non-options now occupy. */
first_nonopt += (optind - last_nonopt);
last_nonopt = optind;
}
+
+/* Initialize the internal data when the first call is made. */
+
+static const char *
+_getopt_initialize (optstring)
+ const char *optstring;
+{
+ /* Start processing options with ARGV-element 1 (since ARGV-element 0
+ is the program name); the sequence of previously skipped
+ non-option ARGV-elements is empty. */
+
+ first_nonopt = last_nonopt = optind = 1;
+
+ nextchar = NULL;
+
+ /* Determine how to handle the ordering of options and nonoptions. */
+
+ if (optstring[0] == '-')
+ {
+ ordering = RETURN_IN_ORDER;
+ ++optstring;
+ }
+ else if (optstring[0] == '+')
+ {
+ ordering = REQUIRE_ORDER;
+ ++optstring;
+ }
+ else if (getenv ("POSIXLY_CORRECT") != NULL)
+ ordering = REQUIRE_ORDER;
+ else
+ ordering = PERMUTE;
+
+ return optstring;
+}
\f
/* Scan elements of ARGV (whose length is ARGC) for option characters
given in OPTSTRING.
int *longind;
int long_only;
{
- int option_index;
-
- optarg = 0;
-
- /* Initialize the internal data when the first call is made.
- Start processing options with ARGV-element 1 (since ARGV-element 0
- is the program name); the sequence of previously skipped
- non-option ARGV-elements is empty. */
+ optarg = NULL;
if (optind == 0)
- {
- first_nonopt = last_nonopt = optind = 1;
-
- nextchar = NULL;
-
- /* Determine how to handle the ordering of options and nonoptions. */
-
- if (optstring[0] == '-')
- {
- ordering = RETURN_IN_ORDER;
- ++optstring;
- }
- else if (optstring[0] == '+')
- {
- ordering = REQUIRE_ORDER;
- ++optstring;
- }
- else if (getenv ("POSIXLY_CORRECT") != NULL)
- ordering = REQUIRE_ORDER;
- else
- ordering = PERMUTE;
- }
+ optstring = _getopt_initialize (optstring);
if (nextchar == NULL || *nextchar == '\0')
{
+ /* Advance to the next ARGV-element. */
+
if (ordering == PERMUTE)
{
/* If we have just processed some options following some non-options,
else if (last_nonopt != optind)
first_nonopt = optind;
- /* Now skip any additional non-options
+ /* Skip any additional non-options
and extend the range of non-options previously skipped. */
while (optind < argc
- && (argv[optind][0] != '-' || argv[optind][1] == '\0')
-#ifdef GETOPT_COMPAT
- && (longopts == NULL
- || argv[optind][0] != '+' || argv[optind][1] == '\0')
-#endif /* GETOPT_COMPAT */
- )
+ && (argv[optind][0] != '-' || argv[optind][1] == '\0'))
optind++;
last_nonopt = optind;
}
- /* Special ARGV-element `--' means premature end of options.
+ /* The special ARGV-element `--' means premature end of options.
Skip it like a null option,
then exchange with previous non-options as if it were an option,
then skip everything else like a non-option. */
/* If we have come to a non-option and did not permute it,
either stop the scan or describe it to the caller and pass it by. */
- if ((argv[optind][0] != '-' || argv[optind][1] == '\0')
-#ifdef GETOPT_COMPAT
- && (longopts == NULL
- || argv[optind][0] != '+' || argv[optind][1] == '\0')
-#endif /* GETOPT_COMPAT */
- )
+ if ((argv[optind][0] != '-' || argv[optind][1] == '\0'))
{
if (ordering == REQUIRE_ORDER)
return EOF;
}
/* We have found another option-ARGV-element.
- Start decoding its characters. */
+ Skip the initial punctuation. */
nextchar = (argv[optind] + 1
+ (longopts != NULL && argv[optind][1] == '-'));
}
+ /* Decode the current option-ARGV-element. */
+
+ /* Check whether the ARGV-element is a long option.
+
+ If long_only and the ARGV-element has the form "-f", where f is
+ a valid short option, don't consider it an abbreviated form of
+ a long option that starts with f. Otherwise there would be no
+ way to give the -f short option.
+
+ On the other hand, if there's a long option "fubar" and
+ the ARGV-element is "-fu", do consider that an abbreviation of
+ the long option, just like "--fu", and not "-f" with arg "u".
+
+ This distinction seems to be the most useful approach. */
+
if (longopts != NULL
- && ((argv[optind][0] == '-'
- && (argv[optind][1] == '-' || long_only))
-#ifdef GETOPT_COMPAT
- || argv[optind][0] == '+'
-#endif /* GETOPT_COMPAT */
- ))
+ && (argv[optind][1] == '-'
+ || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
{
+ char *nameend;
const struct option *p;
- char *s = nextchar;
+ const struct option *pfound = NULL;
int exact = 0;
int ambig = 0;
- const struct option *pfound = NULL;
int indfound;
+ int option_index;
- while (*s && *s != '=')
- s++;
+ for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
+ /* Do nothing. */ ;
- /* Test all options for either exact match or abbreviated matches. */
- for (p = longopts, option_index = 0; p->name;
- p++, option_index++)
- if (!strncmp (p->name, nextchar, s - nextchar))
+ /* Test all long options for either exact match
+ or abbreviated matches. */
+ for (p = longopts, option_index = 0; p->name; p++, option_index++)
+ if (!strncmp (p->name, nextchar, nameend - nextchar))
{
- if (s - nextchar == strlen (p->name))
+ if (nameend - nextchar == strlen (p->name))
{
/* Exact match found. */
pfound = p;
indfound = option_index;
}
else
- /* Second nonexact match found. */
+ /* Second or later nonexact match found. */
ambig = 1;
}
{
option_index = indfound;
optind++;
- if (*s)
+ if (*nameend)
{
/* Don't test has_arg with >, because some C compilers don't
allow it to be used on enums. */
if (pfound->has_arg)
- optarg = s + 1;
+ optarg = nameend + 1;
else
{
if (opterr)
fprintf (stderr, "%s: option `%s' requires an argument\n",
argv[0], argv[optind - 1]);
nextchar += strlen (nextchar);
- return '?';
+ return optstring[0] == ':' ? ':' : '?';
}
}
nextchar += strlen (nextchar);
}
return pfound->val;
}
+
/* Can't find it as a long option. If this is not getopt_long_only,
or the option starts with '--' or is not a valid short
option, then it's an error.
Otherwise interpret it as a short option. */
if (!long_only || argv[optind][1] == '-'
-#ifdef GETOPT_COMPAT
- || argv[optind][0] == '+'
-#endif /* GETOPT_COMPAT */
|| my_index (optstring, *nextchar) == NULL)
{
if (opterr)
}
}
- /* Look at and handle the next option-character. */
+ /* Look at and handle the next short option-character. */
{
char c = *nextchar++;
{
if (opterr)
{
- if (c < 040 || c >= 0177)
- fprintf (stderr, "%s: unrecognized option, character code 0%o\n",
- argv[0], c);
- else
- fprintf (stderr, "%s: unrecognized option `-%c'\n", argv[0], c);
+ /* 1003.2 specifies the format of this message. */
+ fprintf (stderr, "%s: illegal option -- %c\n", argv[0], c);
}
+ optopt = c;
return '?';
}
if (temp[1] == ':')
optind++;
}
else
- optarg = 0;
+ optarg = NULL;
nextchar = NULL;
}
else
else if (optind == argc)
{
if (opterr)
- fprintf (stderr, "%s: option `-%c' requires an argument\n",
- argv[0], c);
- c = '?';
+ {
+ /* 1003.2 specifies the format of this message. */
+ fprintf (stderr, "%s: option requires an argument -- %c\n",
+ argv[0], c);
+ }
+ optopt = c;
+ if (optstring[0] == ':')
+ c = ':';
+ else
+ c = '?';
}
else
/* We already incremented `optind' once;
(int *) 0,
0);
}
+
+#endif /* _LIBC or not __GNU_LIBRARY__. */
\f
#ifdef TEST
projects / gnulib.git / blobdiff