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rcsid[] and sccsid[] and copyright[] are essentially unmaintained (and
unmaintainable).  these days, people use source.  these id's do not provide
any benefit, and do hurt the small install media
(the 33,000 line diff is essentially mechanical)
ok with the idea millert, ok dms

/*	$OpenBSD: args.c,v 1.15 2009/10/27 23:59:39 deraadt Exp $	*/

/*
 * Copyright (c) 1980, 1993
 *	The Regents of the University of California.
 * Copyright (c) 1976 Board of Trustees of the University of Illinois.
 * Copyright (c) 1985 Sun Microsystems, Inc.
 * 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. 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.
 */

/*
 * Argument scanning and profile reading code.  Default parameters are set
 * here as well.
 */

#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "indent_globs.h"
#include <err.h>

/* profile types */
#define	PRO_SPECIAL	1	/* special case */
#define	PRO_BOOL	2	/* boolean */
#define	PRO_INT		3	/* integer */
#define	PRO_FONT	4	/* troff font */

/* profile specials for booleans */
#define	ON		1	/* turn it on */
#define	OFF		0	/* turn it off */

/* profile specials for specials */
#define	IGN		1	/* ignore it */
#define	CLI		2	/* case label indent (float) */
#define	STDIN		3	/* use stdin */
#define	KEY		4	/* type (keyword) */

char *option_source = "?";

/*
 * N.B.: because of the way the table here is scanned, options whose names are
 * substrings of other options must occur later; that is, with -lp vs -l, -lp
 * must be first.  Also, while (most) booleans occur more than once, the last
 * default value is the one actually assigned.
 */
struct pro {
    char       *p_name;		/* name, eg -bl, -cli */
    int         p_type;		/* type (int, bool, special) */
    int         p_default;	/* the default value (if int) */
    int         p_special;	/* depends on type */
    int        *p_obj;		/* the associated variable */
}           pro[] = {

	{ "T", PRO_SPECIAL, 0, KEY, 0 },
	{"bacc", PRO_BOOL, false, ON,
	 &blanklines_around_conditional_compilation },
	{"badp", PRO_BOOL, false, ON,
	 &blanklines_after_declarations_at_proctop },
	{"bad", PRO_BOOL, false, ON, &blanklines_after_declarations },
	{"bap", PRO_BOOL, false, ON, &blanklines_after_procs },
	{"bbb", PRO_BOOL, false, ON, &blanklines_before_blockcomments },
	{"bc", PRO_BOOL, true, OFF, &ps.leave_comma },
	{"bl", PRO_BOOL, true, OFF, &btype_2 },
	{"br", PRO_BOOL, true, ON, &btype_2 },
	{"bs", PRO_BOOL, false, ON, &Bill_Shannon },
	{"cdb", PRO_BOOL, true, ON, &comment_delimiter_on_blankline },
	{"cd", PRO_INT, 0, 0, &ps.decl_com_ind },
	{"ce", PRO_BOOL, true, ON, &cuddle_else },
	{"ci", PRO_INT, 0, 0, &continuation_indent },
	{"cli", PRO_SPECIAL, 0, CLI, 0 },
	{"c", PRO_INT, 33, 0, &ps.com_ind },
	{"di", PRO_INT, 16, 0, &ps.decl_indent },
	{"dj", PRO_BOOL, false, ON, &ps.ljust_decl },
	{"d", PRO_INT, 0, 0, &ps.unindent_displace },
	{"eei", PRO_BOOL, false, ON, &extra_expression_indent },
	{"ei", PRO_BOOL, true, ON, &ps.else_if },
	{"fbc", PRO_FONT, 0, 0, (int *) &blkcomf },
	{"fbx", PRO_FONT, 0, 0, (int *) &boxcomf },
	{"fb", PRO_FONT, 0, 0, (int *) &bodyf },
	{"fc1", PRO_BOOL, true, ON, &format_col1_comments },
	{"fc", PRO_FONT, 0, 0, (int *) &scomf },
	{"fk", PRO_FONT, 0, 0, (int *) &keywordf },
	{"fs", PRO_FONT, 0, 0, (int *) &stringf },
	{"ip", PRO_BOOL, true, ON, &ps.indent_parameters },
	{"i", PRO_INT, 8, 0, &ps.ind_size },
	{"lc", PRO_INT, 0, 0, &block_comment_max_col },
	{"lp", PRO_BOOL, true, ON, &lineup_to_parens },
	{"l", PRO_INT, 78, 0, &max_col },
	{"nbacc", PRO_BOOL, false, OFF,
	 &blanklines_around_conditional_compilation },
	{"nbadp", PRO_BOOL, false, OFF,
	 &blanklines_after_declarations_at_proctop },
	{"nbad", PRO_BOOL, false, OFF, &blanklines_after_declarations },
	{"nbap", PRO_BOOL, false, OFF, &blanklines_after_procs },
	{"nbbb", PRO_BOOL, false, OFF, &blanklines_before_blockcomments },
	{"nbc", PRO_BOOL, true, ON, &ps.leave_comma },
	{"nbs", PRO_BOOL, false, OFF, &Bill_Shannon },
	{"ncdb", PRO_BOOL, true, OFF, &comment_delimiter_on_blankline },
	{"nce", PRO_BOOL, true, OFF, &cuddle_else },
	{"ndj", PRO_BOOL, false, OFF, &ps.ljust_decl },
	{"neei", PRO_BOOL, false, OFF, &extra_expression_indent },
	{"nei", PRO_BOOL, true, OFF, &ps.else_if },
	{"nfc1", PRO_BOOL, true, OFF, &format_col1_comments },
	{"nip", PRO_BOOL, true, OFF, &ps.indent_parameters },
	{"nlp", PRO_BOOL, true, OFF, &lineup_to_parens },
	{"npcs", PRO_BOOL, false, OFF, &proc_calls_space },
	{"npro", PRO_SPECIAL, 0, IGN, 0 },
	{"npsl", PRO_BOOL, true, OFF, &procnames_start_line },
	{"nps", PRO_BOOL, false, OFF, &pointer_as_binop },
	{"nsc", PRO_BOOL, true, OFF, &star_comment_cont },
	{"nsob", PRO_BOOL, false, OFF, &swallow_optional_blanklines },
	{"nv", PRO_BOOL, false, OFF, &verbose },
	{"pcs", PRO_BOOL, false, ON, &proc_calls_space },
	{"psl", PRO_BOOL, true, ON, &procnames_start_line },
	{"ps", PRO_BOOL, false, ON, &pointer_as_binop },
	{"sc", PRO_BOOL, true, ON, &star_comment_cont },
	{"sob", PRO_BOOL, false, ON, &swallow_optional_blanklines },
	{"st", PRO_SPECIAL, 0, STDIN, 0 },
	{"troff", PRO_BOOL, false, ON, &troff },
	{"v", PRO_BOOL, false, ON, &verbose },
	/* whew! */
	{ 0, 0, 0, 0, 0 }
};

void scan_profile(FILE *);
void set_option(char *);

/*
 * set_profile reads $HOME/.indent.pro and ./.indent.pro and handles arguments
 * given in these files.
 */
void
set_profile(void)
{
    FILE *f;
    char        fname[BUFSIZ];
    char	*home;
    static char prof[] = ".indent.pro";

    home = getenv("HOME");
    if (home != NULL && *home != '\0') {
	if (snprintf(fname, sizeof fname, "%s/%s", home, prof) >= sizeof fname) {
	    warnx("%s/%s: %s", home, prof, strerror(ENAMETOOLONG));
	    return;
	}
	if ((f = fopen(option_source = fname, "r")) != NULL) {
	    scan_profile(f);
	    (void) fclose(f);
	}
    }
    if ((f = fopen(option_source = prof, "r")) != NULL) {
	scan_profile(f);
	(void) fclose(f);
    }
    option_source = "Command line";
}

void
scan_profile(FILE *f)
{
    int i;
    char *p;
    char        buf[BUFSIZ];

    while (1) {
	for (p = buf;
	    (i = getc(f)) != EOF && (*p = i) > ' ' && p + 1 - buf < BUFSIZ;
	    ++p)
		;
	if (p != buf) {
	    *p = 0;
	    if (verbose)
		printf("profile: %s\n", buf);
	    set_option(buf);
	}
	else if (i == EOF)
	    return;
    }
}

char       *param_start;

int
eqin(char *s1, char *s2)
{
    while (*s1) {
	if (*s1++ != *s2++)
	    return (false);
    }
    param_start = s2;
    return (true);
}

/*
 * Set the defaults.
 */
void
set_defaults(void)
{
    struct pro *p;

    /*
     * Because ps.case_indent is a float, we can't initialize it from the
     * table:
     */
    ps.case_indent = 0.0;	/* -cli0.0 */
    for (p = pro; p->p_name; p++)
	if (p->p_type != PRO_SPECIAL && p->p_type != PRO_FONT)
	    *p->p_obj = p->p_default;
}

void
set_option(char *arg)
{
    struct pro *p;

    arg++;			/* ignore leading "-" */
    for (p = pro; p->p_name; p++)
	if (*p->p_name == *arg && eqin(p->p_name, arg))
	    goto found;
    errx(1, "%s: unknown parameter \"%s\"", option_source, arg - 1);
found:
    switch (p->p_type) {

    case PRO_SPECIAL:
	switch (p->p_special) {

	case IGN:
	    break;

	case CLI:
	    if (*param_start == 0)
		goto need_param;
	    ps.case_indent = atof(param_start);
	    break;

	case STDIN:
	    if (input == 0)
		input = stdin;
	    if (output == 0)
		output = stdout;
	    break;

	case KEY:
	    if (*param_start == 0)
		goto need_param;
	    {
		char *str;
		if ((str = strdup(param_start)) == NULL)
			err(1, NULL);
		addkey(str, 4);
	    }
	    break;

	default:
	    errx(1, "set_option: internal error: p_special %d", p->p_special);
	}
	break;

    case PRO_BOOL:
	if (p->p_special == OFF)
	    *p->p_obj = false;
	else
	    *p->p_obj = true;
	break;

    case PRO_INT:
	if (!isdigit(*param_start)) {
    need_param:
	    errx(1, "%s: ``%s'' requires a parameter", option_source, arg - 1);
	}
	*p->p_obj = atoi(param_start);
	if (*p->p_name == 'i' && *p->p_obj <= 0)
		errx(1, "%s: ``%s must be greater of zero''",
		    option_source, arg - 1);
	break;

    case PRO_FONT:
	parsefont((struct fstate *) p->p_obj, param_start);
	break;

    default:
	errx(1, "set_option: internal error: p_type %d", p->p_type);
    }
}