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fill two complete round-trip maps EBCDIC <-> ASCII

This commit is contained in:
tg 2017-04-28 02:40:26 +00:00
parent 1289bc69fb
commit 2482c8b73d
2 changed files with 13 additions and 6 deletions
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8
sh.h
View File

@ -175,7 +175,7 @@
#endif
#ifdef EXTERN
__RCSID("$MirOS: src/bin/mksh/sh.h,v 1.823 2017/04/28 02:24:58 tg Exp $");
__RCSID("$MirOS: src/bin/mksh/sh.h,v 1.824 2017/04/28 02:40:25 tg Exp $");
#endif
#define MKSH_VERSION "R55 2017/04/27"
@ -1470,12 +1470,18 @@ EXTERN char ifs0;
/* one-way to-ascii-or-high conversion */
#ifdef MKSH_EBCDIC
EXTERN unsigned short ebcdic_map[256];
EXTERN unsigned char ebcdic_rtt_toascii[256];
EXTERN unsigned char ebcdic_rtt_fromascii[256];
extern void ebcdic_init(void);
#define asc(c) ((unsigned int)ebcdic_map[(unsigned char)(c)])
#define rtt2asc(c) ebcdic_rtt_toascii[(unsigned char)(c)]
#define asc2rtt(c) ebcdic_rtt_fromascii[(unsigned char)(c)]
/* case-independent char comparison */
#define ksh_eq(c,u,l) (ord(c) == ord(u) || ord(c) == ord(l))
#else
#define asc(c) ord(c)
#define rtt2asc(c) ((unsigned char)(c))
#define asc2rtt(c) ((unsigned char)(c))
#define ksh_eq(c,u,l) ((ord(c) | 0x20) == ord(l))
#endif
/* new fast character classes */

11
shf.c
View File

@ -25,7 +25,7 @@
#include "sh.h"
__RCSID("$MirOS: src/bin/mksh/shf.c,v 1.86 2017/04/28 01:15:51 tg Exp $");
__RCSID("$MirOS: src/bin/mksh/shf.c,v 1.87 2017/04/28 02:40:26 tg Exp $");
/* flags to shf_emptybuf() */
#define EB_READSW 0x01 /* about to switch to reading */
@ -1225,18 +1225,19 @@ ebcdic_init(void)
{
int i = 256;
unsigned char t;
char buf[256];
while (i--)
buf[i] = i;
ebcdic_rtt_toascii[i] = i;
setlocale(LC_ALL, "");
if (__etoa_l(buf, 256) != 256) {
if (__etoa_l(ebcdic_rtt_toascii, 256) != 256) {
write(2, "mksh: could not map EBCDIC to ASCII\n", 36);
exit(255);
}
i = 0;
do {
/* fill the complete round-trip map */
ebcdic_rtt_fromascii[ebcdic_rtt_toascii[i]] = i;
/*
* Only use the converted value if it's in the range
* [0x00; 0x7F], which I checked; the "extended ASCII"
@ -1248,7 +1249,7 @@ ebcdic_init(void)
* an unsigned int, and or the raw unconverted EBCDIC
* values with 0x01000000 instead.
*/
if ((t = (unsigned char)buf[i]) < 0x80U)
if ((t = ebcdic_rtt_toascii[i]) < 0x80U)
ebcdic_map[i] = (unsigned short)ord(t);
else
ebcdic_map[i] = (unsigned short)(0x100U | ord(i));