ebcdic.h
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上传日期:2013-02-24
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- /*
- * include/asm-s390/ebcdic.h
- * EBCDIC -> ASCII, ASCII -> EBCDIC conversion routines.
- *
- * S390 version
- * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
- * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
- */
- #ifndef _EBCDIC_H
- #define _EBCDIC_H
- #ifndef _S390_TYPES_H
- #include <types.h>
- #endif
- extern __u8 _ascebc_500[]; /* ASCII -> EBCDIC 500 conversion table */
- extern __u8 _ebcasc_500[]; /* EBCDIC 500 -> ASCII conversion table */
- extern __u8 _ascebc[]; /* ASCII -> EBCDIC conversion table */
- extern __u8 _ebcasc[]; /* EBCDIC -> ASCII conversion table */
- extern __u8 _ebc_tolower[]; /* EBCDIC -> lowercase */
- extern __u8 _ebc_toupper[]; /* EBCDIC -> uppercase */
- extern __inline__
- void codepage_convert(const __u8 *codepage, volatile __u8 * addr, int nr)
- {
- if (nr <= 0)
- return;
- __asm__ __volatile__(
- " bras 1,1fn"
- " tr 0(1,%0),0(%2)n"
- "0: tr 0(256,%0),0(%2)n"
- " la %0,256(%0)n"
- "1: ahi %1,-256n"
- " jp 0bn"
- " ex %1,0(1)"
- : "+&a" (addr), "+&a" (nr-1)
- : "a" (codepage) : "cc", "memory", "1" );
- }
- #define ASCEBC(addr,nr) codepage_convert(_ascebc, addr, nr)
- #define EBCASC(addr,nr) codepage_convert(_ebcasc, addr, nr)
- #define ASCEBC_500(addr,nr) codepage_convert(_ascebc_500, addr, nr)
- #define EBCASC_500(addr,nr) codepage_convert(_ebcasc_500, addr, nr)
- #define EBC_TOLOWER(addr,nr) codepage_convert(_ebc_tolower, addr, nr)
- #define EBC_TOUPPER(addr,nr) codepage_convert(_ebc_toupper, addr, nr)
- #endif