/* ====================================================================
 * Copyright (c) 1998-1999 The Apache Group.  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 acknowledgment:
 *    "This product includes software developed by the Apache Group
 *    for use in the Apache HTTP server project (http://www.apache.org/)."
 *
 * 4. The names "Apache Server" and "Apache Group" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the Apache Group
 *    for use in the Apache HTTP server project (http://www.apache.org/)."
 *
 * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
 * EXPRESSED 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 APACHE GROUP OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Group and was originally based
 * on public domain software written at the National Center for
 * Supercomputing Applications, University of Illinois, Urbana-Champaign.
 * For more information on the Apache Group and the Apache HTTP server
 * project, please see <http://www.apache.org/>.
 *
 */


#ifdef CHARSET_EBCDIC
#include "ap_config.h"
#include "ebcdic.h"
/*
This code does basic character mapping for IBM's TPF operating system.
It is a modified version of <Martin.Kraemer@Mch.SNI.De>'s code for
the BS2000 (apache/src/os/bs2000/ebcdic.c).
*/

/*
Bijective EBCDIC (character set IBM-1047) to US-ASCII table:
This table is bijective - there are no ambigous or duplicate characters.
*/
const unsigned char os_toascii_strictly[256] = {
    0x00, 0x01, 0x02, 0x03, 0x85, 0x09, 0x86, 0x7f, /* 00-0f:           */
    0x87, 0x8d, 0x8e, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* ................ */
    0x10, 0x11, 0x12, 0x13, 0x8f, 0x0a, 0x08, 0x97, /* 10-1f:           */
    0x18, 0x19, 0x9c, 0x9d, 0x1c, 0x1d, 0x1e, 0x1f, /* ................ */
    0x80, 0x81, 0x82, 0x83, 0x84, 0x92, 0x17, 0x1b, /* 20-2f:           */
    0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x05, 0x06, 0x07, /* ................ */
    0x90, 0x91, 0x16, 0x93, 0x94, 0x95, 0x96, 0x04, /* 30-3f:           */
    0x98, 0x99, 0x9a, 0x9b, 0x14, 0x15, 0x9e, 0x1a, /* ................ */
    0x20, 0xa0, 0xe2, 0xe4, 0xe0, 0xe1, 0xe3, 0xe5, /* 40-4f:           */
    0xe7, 0xf1, 0xa2, 0x2e, 0x3c, 0x28, 0x2b, 0x7c, /*  ...........<(+| */
    0x26, 0xe9, 0xea, 0xeb, 0xe8, 0xed, 0xee, 0xef, /* 50-5f:           */
    0xec, 0xdf, 0x21, 0x24, 0x2a, 0x29, 0x3b, 0x5e, /* &.........!$*);^ */
    0x2d, 0x2f, 0xc2, 0xc4, 0xc0, 0xc1, 0xc3, 0xc5, /* 60-6f:           */
    0xc7, 0xd1, 0xa6, 0x2c, 0x25, 0x5f, 0x3e, 0x3f, /* -/.........,%_>? */
    0xf8, 0xc9, 0xca, 0xcb, 0xc8, 0xcd, 0xce, 0xcf, /* 70-7f:           */
    0xcc, 0x60, 0x3a, 0x23, 0x40, 0x27, 0x3d, 0x22, /* .........`:#@'=" */
    0xd8, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 80-8f:           */
    0x68, 0x69, 0xab, 0xbb, 0xf0, 0xfd, 0xfe, 0xb1, /* .abcdefghi...... */
    0xb0, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, /* 90-9f:           */
    0x71, 0x72, 0xaa, 0xba, 0xe6, 0xb8, 0xc6, 0xa4, /* .jklmnopqr...... */
    0xb5, 0x7e, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, /* a0-af:           */
    0x79, 0x7a, 0xa1, 0xbf, 0xd0, 0x5b, 0xde, 0xae, /* .~stuvwxyz...[.. */
    0xac, 0xa3, 0xa5, 0xb7, 0xa9, 0xa7, 0xb6, 0xbc, /* b0-bf:           */
    0xbd, 0xbe, 0xdd, 0xa8, 0xaf, 0x5d, 0xb4, 0xd7, /* .............].. */
    0x7b, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* c0-cf:           */
    0x48, 0x49, 0xad, 0xf4, 0xf6, 0xf2, 0xf3, 0xf5, /* {ABCDEFGHI...... */
    0x7d, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, /* d0-df:           */
    0x51, 0x52, 0xb9, 0xfb, 0xfc, 0xf9, 0xfa, 0xff, /* }JKLMNOPQR...... */
    0x5c, 0xf7, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, /* e0-ef:           */
    0x59, 0x5a, 0xb2, 0xd4, 0xd6, 0xd2, 0xd3, 0xd5, /* \.STUVWXYZ...... */
    0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* f0-ff:           */
    0x38, 0x39, 0xb3, 0xdb, 0xdc, 0xd9, 0xda, 0x9f  /* 0123456789...... */
};

/*
Server EBCDIC (character set IBM-1047) to US-ASCII table:
This table is a copy of the os_toascii_strictly bijective table above.
The only change is that hex 0a (\012 octal) is mapped to hex 0a
(ASCII's line feed) instead of hex 8e.  This is done because throughout
Apache, protocol string definitions hardcode the linefeed as \012 (octal):
"Content-Type: text/plain\015\012".  Without this kludge all protocol
string definitions would need to be changed from ...\012 to ...\025.
*/
const unsigned char os_toascii[256] = {
    0x00, 0x01, 0x02, 0x03, 0x85, 0x09, 0x86, 0x7f, /* 00-0f:           */
    0x87, 0x8d, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* ................ */
    0x10, 0x11, 0x12, 0x13, 0x8f, 0x0a, 0x08, 0x97, /* 10-1f:           */
    0x18, 0x19, 0x9c, 0x9d, 0x1c, 0x1d, 0x1e, 0x1f, /* ................ */
    0x80, 0x81, 0x82, 0x83, 0x84, 0x92, 0x17, 0x1b, /* 20-2f:           */
    0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x05, 0x06, 0x07, /* ................ */
    0x90, 0x91, 0x16, 0x93, 0x94, 0x95, 0x96, 0x04, /* 30-3f:           */
    0x98, 0x99, 0x9a, 0x9b, 0x14, 0x15, 0x9e, 0x1a, /* ................ */
    0x20, 0xa0, 0xe2, 0xe4, 0xe0, 0xe1, 0xe3, 0xe5, /* 40-4f:           */
    0xe7, 0xf1, 0xa2, 0x2e, 0x3c, 0x28, 0x2b, 0x7c, /*  ...........<(+| */
    0x26, 0xe9, 0xea, 0xeb, 0xe8, 0xed, 0xee, 0xef, /* 50-5f:           */
    0xec, 0xdf, 0x21, 0x24, 0x2a, 0x29, 0x3b, 0x5e, /* &.........!$*);^ */
    0x2d, 0x2f, 0xc2, 0xc4, 0xc0, 0xc1, 0xc3, 0xc5, /* 60-6f:           */
    0xc7, 0xd1, 0xa6, 0x2c, 0x25, 0x5f, 0x3e, 0x3f, /* -/.........,%_>? */
    0xf8, 0xc9, 0xca, 0xcb, 0xc8, 0xcd, 0xce, 0xcf, /* 70-7f:           */
    0xcc, 0x60, 0x3a, 0x23, 0x40, 0x27, 0x3d, 0x22, /* .........`:#@'=" */
    0xd8, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 80-8f:           */
    0x68, 0x69, 0xab, 0xbb, 0xf0, 0xfd, 0xfe, 0xb1, /* .abcdefghi...... */
    0xb0, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, /* 90-9f:           */
    0x71, 0x72, 0xaa, 0xba, 0xe6, 0xb8, 0xc6, 0xa4, /* .jklmnopqr...... */
    0xb5, 0x7e, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, /* a0-af:           */
    0x79, 0x7a, 0xa1, 0xbf, 0xd0, 0x5b, 0xde, 0xae, /* .~stuvwxyz...[.. */
    0xac, 0xa3, 0xa5, 0xb7, 0xa9, 0xa7, 0xb6, 0xbc, /* b0-bf:           */
    0xbd, 0xbe, 0xdd, 0xa8, 0xaf, 0x5d, 0xb4, 0xd7, /* .............].. */
    0x7b, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* c0-cf:           */
    0x48, 0x49, 0xad, 0xf4, 0xf6, 0xf2, 0xf3, 0xf5, /* {ABCDEFGHI...... */
    0x7d, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, /* d0-df:           */
    0x51, 0x52, 0xb9, 0xfb, 0xfc, 0xf9, 0xfa, 0xff, /* }JKLMNOPQR...... */
    0x5c, 0xf7, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, /* e0-ef:           */
    0x59, 0x5a, 0xb2, 0xd4, 0xd6, 0xd2, 0xd3, 0xd5, /* \.STUVWXYZ...... */
    0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* f0-ff:           */
    0x38, 0x39, 0xb3, 0xdb, 0xdc, 0xd9, 0xda, 0x9f  /* 0123456789...... */
};

/*
The US-ASCII to EBCDIC (character set IBM-1047) table:
This table is bijective (no ambiguous or duplicate characters)
*/
const unsigned char os_toebcdic[256] = {
    0x00, 0x01, 0x02, 0x03, 0x37, 0x2d, 0x2e, 0x2f, /* 00-0f:           */
    0x16, 0x05, 0x15, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* ................ */
    0x10, 0x11, 0x12, 0x13, 0x3c, 0x3d, 0x32, 0x26, /* 10-1f:           */
    0x18, 0x19, 0x3f, 0x27, 0x1c, 0x1d, 0x1e, 0x1f, /* ................ */
    0x40, 0x5a, 0x7f, 0x7b, 0x5b, 0x6c, 0x50, 0x7d, /* 20-2f:           */
    0x4d, 0x5d, 0x5c, 0x4e, 0x6b, 0x60, 0x4b, 0x61, /*  !"#$%&'()*+,-./ */
    0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* 30-3f:           */
    0xf8, 0xf9, 0x7a, 0x5e, 0x4c, 0x7e, 0x6e, 0x6f, /* 0123456789:;<=>? */
    0x7c, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 40-4f:           */
    0xc8, 0xc9, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, /* @ABCDEFGHIJKLMNO */
    0xd7, 0xd8, 0xd9, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, /* 50-5f:           */
    0xe7, 0xe8, 0xe9, 0xad, 0xe0, 0xbd, 0x5f, 0x6d, /* PQRSTUVWXYZ[\]^_ */
    0x79, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 60-6f:           */
    0x88, 0x89, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, /* `abcdefghijklmno */
    0x97, 0x98, 0x99, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, /* 70-7f:           */
    0xa7, 0xa8, 0xa9, 0xc0, 0x4f, 0xd0, 0xa1, 0x07, /* pqrstuvwxyz{|}~. */
    0x20, 0x21, 0x22, 0x23, 0x24, 0x04, 0x06, 0x08, /* 80-8f:           */
    0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x09, 0x0a, 0x14, /* ................ */
    0x30, 0x31, 0x25, 0x33, 0x34, 0x35, 0x36, 0x17, /* 90-9f:           */
    0x38, 0x39, 0x3a, 0x3b, 0x1a, 0x1b, 0x3e, 0xff, /* ................ */
    0x41, 0xaa, 0x4a, 0xb1, 0x9f, 0xb2, 0x6a, 0xb5, /* a0-af:           */
    0xbb, 0xb4, 0x9a, 0x8a, 0xb0, 0xca, 0xaf, 0xbc, /* ................ */
    0x90, 0x8f, 0xea, 0xfa, 0xbe, 0xa0, 0xb6, 0xb3, /* b0-bf:           */
    0x9d, 0xda, 0x9b, 0x8b, 0xb7, 0xb8, 0xb9, 0xab, /* ................ */
    0x64, 0x65, 0x62, 0x66, 0x63, 0x67, 0x9e, 0x68, /* c0-cf:           */
    0x74, 0x71, 0x72, 0x73, 0x78, 0x75, 0x76, 0x77, /* ................ */
    0xac, 0x69, 0xed, 0xee, 0xeb, 0xef, 0xec, 0xbf, /* d0-df:           */
    0x80, 0xfd, 0xfe, 0xfb, 0xfc, 0xba, 0xae, 0x59, /* ................ */
    0x44, 0x45, 0x42, 0x46, 0x43, 0x47, 0x9c, 0x48, /* e0-ef:           */
    0x54, 0x51, 0x52, 0x53, 0x58, 0x55, 0x56, 0x57, /* ................ */
    0x8c, 0x49, 0xcd, 0xce, 0xcb, 0xcf, 0xcc, 0xe1, /* f0-ff:           */
    0x70, 0xdd, 0xde, 0xdb, 0xdc, 0x8d, 0x8e, 0xdf  /* ................ */
};

/* Translate a memory block from EBCDIC (host charset) to ASCII (net charset)
 * dest and srce may be identical, or separate memory blocks, but
 * should not overlap.
 */
void
ebcdic2ascii(void *dest, const void *srce, size_t count)
{
    unsigned char *udest = dest;
    const unsigned char *usrce = srce;
    while (count-- != 0) {
        *udest++ = os_toascii[*usrce++];
    }
}
void
ebcdic2ascii_strictly(unsigned char *dest, const unsigned char *srce, size_t count)
{
    while (count-- != 0) {
        *dest++ = os_toascii_strictly[*srce++];
    }
}
void
ascii2ebcdic(void *dest, const void *srce, size_t count)
{
        unsigned char *udest = dest;
        const unsigned char *usrce = srce;

        while (count-- != 0) {
                *udest++ = os_toebcdic[*usrce++];
    }
}
#endif /*CHARSET_EBCDIC*/
 
