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GitHub Repository: att/ast
 Path: blob/master/src/lib/libast/comp/getoptl.c
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/***********************************************************************

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*                                                                      *

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*               This software is part of the ast package               *

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*          Copyright (c) 1985-2011 AT&T Intellectual Property          *

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*                      and is licensed under the                       *

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*                 Eclipse Public License, Version 1.0                  *

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*                    by AT&T Intellectual Property                     *

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*                                                                      *

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*                A copy of the License is available at                 *

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*          http://www.eclipse.org/org/documents/epl-v10.html           *

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*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *

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*                                                                      *

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*              Information and Software Systems Research               *

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*                            AT&T Research                             *

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*                           Florham Park NJ                            *

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*                                                                      *

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*                 Glenn Fowler <[email protected]>                  *

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*                  David Korn <[email protected]>                   *

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*                   Phong Vo <[email protected]>                    *

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*                                                                      *

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***********************************************************************/

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#pragma prototyped

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#include <ast.h>

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#include <ast_getopt.h>

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#undef	_BLD_ast	/* enable ast imports since we're user static */

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#include <error.h>

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#include <option.h>

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#include <getopt.h>

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#include <ctype.h>

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static const char*		lastoptstring;

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static const struct option*	lastlongopts;

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static char*			usage;

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static Sfio_t*			up;

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static int			lastoptind;

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static int

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golly(int argc, char* const* argv, const char* optstring, const struct option* longopts, int* longindex, int flags)

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{

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	register char*			s;

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	register const struct option*	o;

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	register int			c;

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	char*				t;

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	if (!up || optstring != lastoptstring || longopts != lastlongopts)

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	{

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		if (!up && !(up = sfstropen()) || !(t = strdup(optstring)))

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			return -1;

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		sfprintf(up, "[-1p%d]", flags);

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		for (o = longopts; o->name; o++)

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		{

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			if (o->flag || o->val <= 0 || o->val > UCHAR_MAX || !isalnum(o->val))

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				sfprintf(up, "\n[%d:%s]", UCHAR_MAX + 1 + (o - longopts), o->name);

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			else

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			{

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				sfprintf(up, "\n[%c:%s]", o->val, o->name);

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				if (s = strchr(t, o->val))

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				{

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					*s++ = ' ';

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					if (*s == ':')

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					{

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						*s++ = ' ';

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						if (*s == ':')

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							*s = ' ';

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					}

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				}

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			}

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			if (o->has_arg)

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			{

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				sfputc(up, ':');

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				if (o->has_arg == optional_argument)

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					sfputc(up, '?');

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				sfprintf(up, "[string]");

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			}

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		}

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		s = t;

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		while (c = *s++)

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			if (c != ' ')

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			{

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				sfprintf(up, "\n[%c]", c);

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				if (*s == ':')

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				{

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					sfputc(up, *s);

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					if (*++s == ':')

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					{

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						sfputc(up, '?');

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						s++;

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					}

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					sfputc(up, '[');

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					sfputc(up, ']');

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				}

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			}

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		sfputc(up, '\n');

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		free(t);

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		if (!(usage = sfstruse(up)))

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			return -1;

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		lastoptstring = optstring;

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		lastlongopts = longopts;

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	}

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	opt_info.index = (optind > 1 || optind == lastoptind) ? optind : 0;

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	if (opt_info.index >= argc || !(c = optget((char**)argv, usage)))

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	{

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		sfstrclose(up);

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		up = 0;

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		c = -1;

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	}

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	else

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	{

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		if (c == ':' || c == '?')

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		{

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			if (opterr && (!optstring || *optstring != ':'))

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			{

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				if (!error_info.id)

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					error_info.id = argv[0];

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				errormsg(NiL, c == '?' ? (ERROR_USAGE|4) : 2, "%s", opt_info.arg);

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			}

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			optopt = opt_info.option[1];

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			c = '?';

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		}

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		optarg = opt_info.arg;

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		if (c < 0)

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		{

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			o = longopts - c - UCHAR_MAX - 1;

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			if (o->flag)

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			{

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				*o->flag = o->val;

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				c = 0;

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			}

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			else

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				c = o->val;

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		}

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	}

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	lastoptind = optind = opt_info.index;

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	return c;

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}

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extern int

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getopt_long(int argc, char* const* argv, const char* optstring, const struct option* longopts, int* longindex)

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{

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	return golly(argc, argv, optstring, longopts, longindex, 2);

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}

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extern int

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getopt_long_only(int argc, char* const* argv, const char* optstring, const struct option* longopts, int* longindex)

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{

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	return golly(argc, argv, optstring, longopts, longindex, 1);

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}

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