/*	$NetBSD: args.c,v 1.13 2016/02/22 21:20:29 ginsbach Exp $	*/

/*
 * Copyright (c) 1980, 1993
 *	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. 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.
 */

/*
 * 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. 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.
 */

#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)args.c	8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: args.c,v 1.13 2016/02/22 21:20:29 ginsbach Exp $");
#endif
#endif				/* not lint */

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

#include <ctype.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "indent_globs.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) */

const 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 {
	const 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
	},
	{
		"nut", PRO_BOOL, true, OFF, &use_tabs
	},
	{
		"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
	},
	{
		"ut", PRO_BOOL, true, ON, &use_tabs
	},
	{
		"v", PRO_BOOL, false, ON, &verbose
	},
	/* whew! */
	{
		0, 0, 0, 0, 0
	}
};
/*
 * 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];
	static char prof[] = ".indent.pro";

	snprintf(fname, sizeof(fname), "%s/%s", getenv("HOME"), prof);
	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);
		if (p != buf) {
			*p++ = 0;
			if (verbose)
				printf("profile: %s\n", buf);
			set_option(buf);
		} else
			if (i == EOF)
				return;
	}
}

const char *param_start;

int
eqin(const char *s1, const 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;

				str = strdup(param_start);
				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((unsigned char)*param_start)) {
	need_param:
			errx(1, "%s: ``%s'' requires a parameter",
			     option_source, arg - 1);
		}
		*p->p_obj = atoi(param_start);
		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);
	}
}