1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * EBCDIC -> ASCII, ASCII -> EBCDIC conversion routines. 4 * 5 * S390 version 6 * Copyright IBM Corp. 1999 7 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com> 8 */ 9 10 #ifndef _EBCDIC_H 11 #define _EBCDIC_H 12 13 #include <linux/ctype.h> 14 #include <linux/types.h> 15 16 extern __u8 _ascebc_500[256]; /* ASCII -> EBCDIC 500 conversion table */ 17 extern __u8 _ebcasc_500[256]; /* EBCDIC 500 -> ASCII conversion table */ 18 extern __u8 _ascebc[256]; /* ASCII -> EBCDIC conversion table */ 19 extern __u8 _ebcasc[256]; /* EBCDIC -> ASCII conversion table */ 20 extern __u8 _ebc_tolower[256]; /* EBCDIC -> lowercase */ 21 extern __u8 _ebc_toupper[256]; /* EBCDIC -> uppercase */ 22 extern const __u8 _ebctype_asc[256]; /* EBCDIC -> character classes */ 23 24 #define __ismask_ebc_asc(x) (_ebctype_asc[(int)(unsigned char)(x)]) 25 #define isprint_ebc_asc(c) ((__ismask_ebc_asc(c)&(_P|_U|_L|_D|_SP)) != 0) 26 #define isspace_ebc_asc(c) ((__ismask_ebc_asc(c)&(_S)) != 0) 27 28 static inline void 29 codepage_convert(const __u8 *codepage, volatile char *addr, unsigned long nr) 30 { 31 if (!nr--) 32 return; 33 asm volatile( 34 " j 2f\n" 35 "0: tr 0(1,%0),0(%2)\n" 36 "1: tr 0(256,%0),0(%2)\n" 37 " la %0,256(%0)\n" 38 "2: aghi %1,-256\n" 39 " jnm 1b\n" 40 " exrl %1,0b" 41 : "+&a" (addr), "+&a" (nr) 42 : "a" (codepage) : "cc", "memory"); 43 } 44 45 #define ASCEBC(addr,nr) codepage_convert(_ascebc, addr, nr) 46 #define EBCASC(addr,nr) codepage_convert(_ebcasc, addr, nr) 47 #define ASCEBC_500(addr,nr) codepage_convert(_ascebc_500, addr, nr) 48 #define EBCASC_500(addr,nr) codepage_convert(_ebcasc_500, addr, nr) 49 #define EBC_TOLOWER(addr,nr) codepage_convert(_ebc_tolower, addr, nr) 50 #define EBC_TOUPPER(addr,nr) codepage_convert(_ebc_toupper, addr, nr) 51 52 #endif 53 54