//____________________________________________________________
//  
//		PROGRAM:	Language Preprocessor
//		MODULE:		pat.cpp
//		DESCRIPTION:	Code generator pattern generator
//  
//  The contents of this file are subject to the Interbase Public
//  License Version 1.0 (the "License"); you may not use this file
//  except in compliance with the License. You may obtain a copy
//  of the License at http://www.Inprise.com/IPL.html
//  
//  Software distributed under the License is distributed on an
//  "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express
//  or implied. See the License for the specific language governing
//  rights and limitations under the License.
//  
//  The Original Code was created by Inprise Corporation
//  and its predecessors. Portions created by Inprise Corporation are
//  Copyright (C) Inprise Corporation.
//  
//  All Rights Reserved.
//  Contributor(s): ______________________________________.
//  
//
//____________________________________________________________
//
//	$Id: pat.cpp,v 1.2 2001-07-29 23:43:22 skywalker Exp $
//

#include "firebird.h"
#include "../jrd/ib_stdio.h"
#include <string.h>
#include "../gpre/gpre.h"
#include "../gpre/form.h"
#include "../gpre/pat.h"
#include "../gpre/gpre_proto.h"
#include "../gpre/pat_proto.h"


extern "C" {


extern TEXT *ident_pattern;

typedef enum {
	NL,
	RH, RL, RT, RI, RS,			/* Request handle, level, transaction, ident, length */
	DH, DF,						/* Database handle, filename */
	TH,							/* Transaction handle */
	BH, BI,						/* Blob handle, blob_ident */
	FH,							/* Form handle */
	V1, V2,						/* Status vectors */
	I1, I2,						/* Identifier numbers */
	RF, RE,						/* OS- and language-dependent REF and REF-end character */
	VF, VE,						/* OS- and language-dependent VAL and VAL-end character */
	S1, S2, S3, S4, S5, S6, S7,
	/* Arbitrary strings */
	N1, N2, N3, N4,				/* Arbitrary number (SSHORT) */
	L1, L2,						/* Arbitrary number (SLONG) */
	PN, PL, PI,					/* Port number, port length, port ident */
	QN, QL, QI,					/* Second port number, port length, port ident */
	IF, EL, EN,					/* If, else, end */
	FR							/* Field reference */
} PAT_T;

static struct ops {
	PAT_T ops_type;
	TEXT ops_string[3];
} operators[] = {
	RH, "RH",
		RL, "RL",
		RT, "RT",
		RI, "RI",
		RS, "RS",
		DH, "DH",
		DF, "DF",
		TH, "TH",
		BH, "BH",
		BI, "BI",
		FH, "FH",
		V1, "V1",
		V2, "V2",
		I1, "I1",
		I2, "I2",
		S1, "S1",
		S2, "S2",
		S3, "S3",
		S4, "S4",
		S5, "S5",
		S6, "S6",
		S7, "S7",
		N1, "N1",
		N2, "N2",
		N3, "N3",
		N4, "N4",
		L1, "L1",
		L2, "L2",
		PN, "PN",
		PL, "PL",
		PI, "PI",
		QN, "QN",
		QL, "QL",
		QI, "QI",
		IF, "IF",
		EL, "EL",
		EN, "EN", RF, "RF", RE, "RE", VF, "VF", VE, "VE", FR, "FR", NL, ""};


//____________________________________________________________
//  
//		Expand a pattern.
//  

void PATTERN_expand( USHORT column, TEXT * pattern, PAT * args)
{
	struct ops *operator_;
	TEXT buffer[512], c, *p, temp1[16], temp2[16];
	USHORT sw_ident, sw_gen, n;
	SSHORT value;				/* value needs to be signed since some of the
								   values printed out are signed.  */
	SLONG long_value;
	BOOLEAN long_flag, handle_flag;
	REF reference;
	TEXT *string, *ref, *refend, *val, *valend, *q;

	ref = "";
	refend = "";
	val = "";
	valend = "";

	if ((sw_language == lang_c) || (sw_language == lang_cxx)) {
		ref = "&";
		refend = "";
	}
	else if (sw_language == lang_pli) {
		ref = "ADDR(";
		refend = ")";
	}
	else if (sw_language == lang_pascal) {
		ref = "%%REF ";
		refend = "";
	}
	else if (sw_language == lang_cobol) {
		ref = "BY REFERENCE ";
		refend = "";
		val = "BY VALUE ";
		valend = "";
	}
	else if (sw_language == lang_fortran) {
#ifdef VMS
		ref = "%REF(";
		refend = ")";
		val = "%VAL(";
		valend = ")";
#endif
#if (defined AIX || defined AIX_PPC)
		ref = "%REF(";
		refend = ")";
		val = "%VAL(";
		valend = ")";
#endif
	}

	p = buffer;
	*p++ = '\n';
	sw_gen = TRUE;
	for (n = column; n; --n)
		*p++ = ' ';

	while (c = *pattern++) {
		if (c != '%') {
			if (sw_gen) {
				*p++ = c;
				if ((c == '\n') && (*pattern))
					for (n = column; n; --n)
						*p++ = ' ';
			}
			continue;
		}
		sw_ident = FALSE;
		string = NULL;
		reference = NULL;
		handle_flag = long_flag = FALSE;
		for (operator_ = operators; operator_->ops_type != NL; operator_++)
			if (operator_->ops_string[0] == pattern[0] &&
				operator_->ops_string[1] == pattern[1])
				break;
		pattern += 2;
		switch (operator_->ops_type) {
		case IF:
			sw_gen = args->pat_condition;
			continue;

		case EL:
			sw_gen = !sw_gen;
			continue;

		case EN:
			sw_gen = TRUE;
			continue;

		case RH:
			handle_flag = TRUE;
			string = args->pat_request->req_handle;
			break;

		case RL:
			string = args->pat_request->req_request_level;
			break;

		case RS:
			value = args->pat_request->req_length;
			break;

		case RT:
			handle_flag = TRUE;
			string = args->pat_request->req_trans;
			break;

		case RI:
			value = args->pat_request->req_ident;
			sw_ident = TRUE;
			break;

		case DH:
			handle_flag = TRUE;
			string = args->pat_database->dbb_name->sym_string;
			break;

		case DF:
			string = args->pat_database->dbb_filename;
			break;

		case PN:
			value = args->pat_port->por_msg_number;
			break;

		case PL:
			value = args->pat_port->por_length;
			break;

		case PI:
			value = args->pat_port->por_ident;
			sw_ident = TRUE;
			break;

		case QN:
			value = args->pat_port2->por_msg_number;
			break;

		case QL:
			value = args->pat_port2->por_length;
			break;

		case QI:
			value = args->pat_port2->por_ident;
			sw_ident = TRUE;
			break;

		case BH:
			value = args->pat_blob->blb_ident;
			sw_ident = TRUE;
			break;

		case I1:
			value = args->pat_ident1;
			sw_ident = TRUE;
			break;

		case I2:
			value = args->pat_ident2;
			sw_ident = TRUE;
			break;

		case S1:
			string = args->pat_string1;
			break;

		case S2:
			string = args->pat_string2;
			break;

		case S3:
			string = args->pat_string3;
			break;

		case S4:
			string = args->pat_string4;
			break;

		case S5:
			string = args->pat_string5;
			break;

		case S6:
			string = args->pat_string6;
			break;

		case S7:
			string = args->pat_string7;
			break;

		case V1:
			string = args->pat_vector1;
			break;

		case V2:
			string = args->pat_vector2;
			break;

		case N1:
			value = args->pat_value1;
			break;

		case N2:
			value = args->pat_value2;
			break;

		case N3:
			value = args->pat_value3;
			break;

		case N4:
			value = args->pat_value4;
			break;

		case L1:
			long_value = args->pat_long1;
			long_flag = TRUE;
			break;

		case L2:
			long_value = args->pat_long2;
			long_flag = TRUE;
			break;

		case RF:
			string = ref;
			break;

		case RE:
			string = refend;
			break;

		case VF:
			string = val;
			break;

		case VE:
			string = valend;
			break;

		case FR:
			reference = args->pat_reference;
			break;

		default:
			sprintf(buffer, "Unknown substitution \"%c%c\"", pattern[-2],
					pattern[-1]);
			IBERROR(buffer);
			continue;
		}
		if (!sw_gen)
			continue;
		if (string) {
			if (handle_flag && (sw_language == lang_ada))
				for (q = ada_package; *q;)
					*p++ = *q++;
			while (*string)
				*p++ = *string++;
			continue;
		}
		if (sw_ident)
			sprintf(p, ident_pattern, value);
		else if (reference) {
			if (!reference->ref_port)
				sprintf(p, ident_pattern, reference->ref_ident);
			else {
				sprintf(temp1, ident_pattern, reference->ref_port->por_ident);
				sprintf(temp2, ident_pattern, reference->ref_ident);
				switch (sw_language) {
				case lang_basic:
					sprintf(p, "%s::%s", temp1, temp2);
					break;

				case lang_fortran:
				case lang_cobol:
					strcpy(p, temp2);
					break;

				default:
					sprintf(p, "%s.%s", temp1, temp2);
				}
			}
		}
		else if (long_flag) {
			if (sw_language == lang_basic)
				sprintf(p, "%d%%", long_value);
			else
				sprintf(p, "%d", long_value);
		}
		else {
			if (sw_language == lang_basic)
				sprintf(p, "%d%%", value);
			else
				sprintf(p, "%d", value);
		}

		while (*p)
			p++;
	}

	*p = 0;
	switch (sw_language) {
#ifdef ADA
		/*  Ada lines can be up to 120 characters long.  ADA_print_buffer
		   handles this problem and ensures that GPRE output is <=120 characters.
		 */
	case lang_ada:
		ADA_print_buffer(buffer, 0);
		break;
#endif

#ifdef BASIC
	case lang_basic:
		/*  Basic lines can be up to 72 characters long.  BAS_print_buffer
		   handles this problem and ensures that GPRE output is <= 72 characters.
		 */
		BAS_print_buffer(buffer);
		break;
#endif

#ifdef COBOL
		/*  COBOL lines can be up to 72 characters long.  COB_print_buffer
		   handles this problem and ensures that GPRE output is <= 72 characters.
		 */
	case lang_cobol:
		COB_print_buffer(buffer, TRUE);
		break;
#endif

#ifdef FORTRAN
		/*  In FORTRAN, characters beyond column 72 are ignored.  FTN_print_buffer
		   handles this problem and ensures that GPRE output does not exceed this
		   limit.
		 */
	case lang_fortran:
		FTN_print_buffer(buffer);
		break;
#endif

	default:
		ib_fprintf(out_file, buffer);
		break;
	}
}


} // extern "C"