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Added copyright notice and license agreement. It is mandatory to distribute
Risa/Asir source codes freely.

/*
 * Copyright (c) 1994-2000 FUJITSU LABORATORIES LIMITED 
 * All rights reserved.
 * 
 * FUJITSU LABORATORIES LIMITED ("FLL") hereby grants you a limited,
 * non-exclusive and royalty-free license to use, copy, modify and
 * redistribute, solely for non-commercial and non-profit purposes, the
 * computer program, "Risa/Asir" ("SOFTWARE"), subject to the terms and
 * conditions of this Agreement. For the avoidance of doubt, you acquire
 * only a limited right to use the SOFTWARE hereunder, and FLL or any
 * third party developer retains all rights, including but not limited to
 * copyrights, in and to the SOFTWARE.
 * 
 * (1) FLL does not grant you a license in any way for commercial
 * purposes. You may use the SOFTWARE only for non-commercial and
 * non-profit purposes only, such as academic, research and internal
 * business use.
 * (2) The SOFTWARE is protected by the Copyright Law of Japan and
 * international copyright treaties. If you make copies of the SOFTWARE,
 * with or without modification, as permitted hereunder, you shall affix
 * to all such copies of the SOFTWARE the above copyright notice.
 * (3) An explicit reference to this SOFTWARE and its copyright owner
 * shall be made on your publication or presentation in any form of the
 * results obtained by use of the SOFTWARE.
 * (4) In the event that you modify the SOFTWARE, you shall notify FLL by
 * e-mail at risa-admin@flab.fujitsu.co.jp of the detailed specification
 * for such modification or the source code of the modified part of the
 * SOFTWARE.
 * 
 * THE SOFTWARE IS PROVIDED AS IS WITHOUT ANY WARRANTY OF ANY KIND. FLL
 * MAKES ABSOLUTELY NO WARRANTIES, EXPRESSED, IMPLIED OR STATUTORY, AND
 * EXPRESSLY DISCLAIMS ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF THIRD PARTIES'
 * RIGHTS. NO FLL DEALER, AGENT, EMPLOYEES IS AUTHORIZED TO MAKE ANY
 * MODIFICATIONS, EXTENSIONS, OR ADDITIONS TO THIS WARRANTY.
 * UNDER NO CIRCUMSTANCES AND UNDER NO LEGAL THEORY, TORT, CONTRACT,
 * OR OTHERWISE, SHALL FLL BE LIABLE TO YOU OR ANY OTHER PERSON FOR ANY
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, PUNITIVE OR CONSEQUENTIAL
 * DAMAGES OF ANY CHARACTER, INCLUDING, WITHOUT LIMITATION, DAMAGES
 * ARISING OUT OF OR RELATING TO THE SOFTWARE OR THIS AGREEMENT, DAMAGES
 * FOR LOSS OF GOODWILL, WORK STOPPAGE, OR LOSS OF DATA, OR FOR ANY
 * DAMAGES, EVEN IF FLL SHALL HAVE BEEN INFORMED OF THE POSSIBILITY OF
 * SUCH DAMAGES, OR FOR ANY CLAIM BY ANY OTHER PARTY. EVEN IF A PART
 * OF THE SOFTWARE HAS BEEN DEVELOPED BY A THIRD PARTY, THE THIRD PARTY
 * DEVELOPER SHALL HAVE NO LIABILITY IN CONNECTION WITH THE USE,
 * PERFORMANCE OR NON-PERFORMANCE OF THE SOFTWARE.
 *
 * $OpenXM: OpenXM_contrib2/asir2000/builtin/help.c,v 1.3 2000/08/21 08:31:20 noro Exp $ 
*/
#include "ca.h"
#include "parse.h"

void Phelp();
void ghelp(void);

struct ftab help_tab[] = {
	{"help",Phelp,-1},
	{0,0,0},
};

void Phelp(arg,rp)
NODE arg;
Obj *rp;
{
	if ( !arg || !ARG0(arg) )
		 help(0);
	else
		switch (OID(ARG0(arg))) {
			case O_P:
				help(NAME(VR((P)ARG0(arg))));
				break;
			case O_STR:
				help(BDY((STRING)ARG0(arg)));
				break;
			default:
				break;
		}
	*rp = 0;
}

static char *ghelpstr[] = {
"<expression> ';'  : eval and print",
"<expression> '$'  : eval",
"end (quit)        : close the current input stream",
"debug             : enter the debug mode",
0
};

void help(s)
char *s;
{
	extern char *asir_libdir;
	extern char *asir_pager;
	char *e;
	static char helpdir[16];

	if ( !helpdir[0] ) {
		e = (char *)getenv("LANG");
		if ( !e )
			strcpy(helpdir,"help");
		else if ( !strncmp(e,"japan",strlen("japan"))
			|| !strncmp(e,"ja_JP",strlen("ja_JP")) )
			strcpy(helpdir,"help-jp");
		else
			strcpy(helpdir,"help-eg");
	}

	if ( !s )
		ghelp();
	else {
#if !defined(VISUAL)
		int i;
		FUNC f;
		char name[BUFSIZ],com[BUFSIZ];
		FILE *fp;

		sprintf(name,"%s/%s/%s",asir_libdir,helpdir,s);
		if ( fp = fopen(name,"r") ) {
			fclose(fp);
			sprintf(com,"%s %s",asir_pager,name);
			system(com);
		} else {
			searchf(usrf,s,&f);			
			if ( f && f->f.usrf->desc )
				fprintf(stderr,"%s\n",f->f.usrf->desc);
		}
#endif
	}
}

void ghelp() {
	int i;

	for ( i = 0; ghelpstr[i]; i++ )
		fprintf(stderr,"%s\n",ghelpstr[i]);
}