/*
 *	PROGRAM:		Firebird Message file modify for escape chars
 *	MODULE:			modify_messages.epp
 *	DESCRIPTION:	Allow modification of messages with translatation of escape sequences
 *
 * 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): ______________________________________.
 */

#include "firebird.h"
#include <stdio.h>
#include "ibase.h"

#include <stdlib.h>


DATABASE DB = "msg.fdb";

static void explicit_print(const TEXT*);


int main( int argc, char **argv)
{
/**************************************
 *
 *	m a i n
 *
 **************************************
 *
 * Functional description
 *	Top level routine.
 *
 **************************************/
	SCHAR facility[20], newtext[256];
	SCHAR innumber[4];
	SSHORT number;

	printf("\nHit Ctrl-D (or Ctrl-Z) at prompt to exit level\n");
	printf("You will be prompted for fac_code and message number\n");
	printf("Escape sequences will be translated to single bytes\n");

	READY;
	START_TRANSACTION;

	for (;;)
	{
		printf("Facility: ");
		if (!gets(facility))
			break;
		FOR Y IN FACILITIES WITH Y.FACILITY CONTAINING facility
			printf("Message number: ");
			if (!gets(innumber))
				break;
			number = atoi(innumber);
			FOR X IN MESSAGES WITH X.FAC_CODE = Y.FAC_CODE AND X.NUMBER = number
				printf(" Current text:");
				explicit_print(X.TEXT);
				printf("\n New text: ");
				if (!gets(newtext))
					break;

				MODIFY X USING

					SCHAR* p = X.TEXT;
					const SCHAR* q = newtext;

					/* translate scape sequences to single bytes */
					while (*q)
					{
						if (*q == '\\')
						{
							*q++;
							switch (*q)
							{
							case 'n':
								*p++ = '\n';
								break;
							case 't':
								*p++ = '\t';
								break;
							case 'f':
								*p++ = '\f';
								break;
							case 'a':
								*p++ = '\a';
								break;
							case 'b':
								*p++ = '\b';
								break;
							case 'r':
								*p++ = '\r';
								break;
							case 'v':
								*p++ = '\v';
								break;
							case '\\':
								*p++ = '\\';
								break;
							case '\"':
								*p++ = '\"';
								break;
							case '\'':
								*p++ = '\'';
								break;
							default:
								printf
									("\n\n*** Escape sequence not understood; being copied unchanged  ***\n\n");
								*p++ = '\\';
								*p++ = *q;
								break;
							}
							*q++;
						}
						else
							*p++ = *q++;
					}
					*p = 0;
				END_MODIFY;
			END_FOR;
		END_FOR;
	}

	COMMIT;
	FINISH;
	exit(FINI_OK);
}


static void explicit_print( const TEXT* string)
{
/**************************************
 *
 *	e x p l i c i t _ p r i n t
 *
 **************************************
 *
 * Functional description
 *	Let it all hang out: print line
 *      with explicit \n \b \t \f etc.
 *      to make changing messages easy
 *
 **************************************/
	const TEXT* p = string;

	while (*p)
	{
		switch (*p)
		{
		case '\n':
			putchar('\\');
			putchar('n');
			break;
		case '\t':
			putchar('\\');
			putchar('t');
			break;
		case '\f':
			putchar('\\');
			putchar('f');
			break;
		case '\b':
			putchar('\\');
			putchar('b');
			break;
		case '\r':
			putchar('\\');
			putchar('r');
			break;
		case '\v':
			putchar('\\');
			break;
		case '\\':
			putchar('\\');
			putchar('\\');
			break;
		case '\"':
			putchar('\\');
			putchar('\"');
			break;
		case '\'':
			putchar('\\');
			putchar('\'');
			break;
		default:
			putchar(*p);
		}
		*p++;
	}
}

