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Fix faulty character to control-character conversion for CTRL().

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The CTRL() macro seems to perform character to control-character
conversion (i.e. 'A' to 0x01) to lowercase characters. This is actually
not valid. If we use lowercase characters, conversions such as
CTRL('\\') and CTRL('?') will result to invalid conversions.

Because we must still support old source code that uses CTRL() (bad!),
we make CTRL() accept both forms. When the character is a lowercase
character, we perform the old style conversion.

Approved by:	philip (mentor)
This commit is contained in:
Ed Schouten 2008-06-05 17:44:18 +00:00
parent 06118b48d0
commit 22e9c72afd
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=179567
1 changed files with 23 additions and 16 deletions
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39
sys/sys/ttydefaults.h
View file

@ -56,25 +56,32 @@
/*
* Control Character Defaults
*/
#define CTRL(x) (x&037)
#define CEOF CTRL('d')
/*
* XXX: A lot of code uses lowercase characters, but control-character
* conversion is actually only valid when applied to uppercase
* characters. We just treat lowercase characters as if they were
* inserted as uppercase.
*/
#define CTRL(x) ((x) >= 'a' && (x) <= 'z' ? \
((x) - 'a' + 1) : (((x) - 'A' + 1) & 0x7f))
#define CEOF CTRL('D')
#define CEOL 0xff /* XXX avoid _POSIX_VDISABLE */
#define CERASE 0177
#define CERASE2 CTRL('h')
#define CINTR CTRL('c')
#define CSTATUS CTRL('t')
#define CKILL CTRL('u')
#define CERASE CTRL('?')
#define CERASE2 CTRL('H')
#define CINTR CTRL('C')
#define CSTATUS CTRL('T')
#define CKILL CTRL('U')
#define CMIN 1
#define CQUIT 034 /* FS, ^\ */
#define CSUSP CTRL('z')
#define CQUIT CTRL('\\')
#define CSUSP CTRL('Z')
#define CTIME 0
#define CDSUSP CTRL('y')
#define CSTART CTRL('q')
#define CSTOP CTRL('s')
#define CLNEXT CTRL('v')
#define CDISCARD CTRL('o')
#define CWERASE CTRL('w')
#define CREPRINT CTRL('r')
#define CDSUSP CTRL('Y')
#define CSTART CTRL('Q')
#define CSTOP CTRL('S')
#define CLNEXT CTRL('V')
#define CDISCARD CTRL('O')
#define CWERASE CTRL('W')
#define CREPRINT CTRL('R')
#define CEOT CEOF
/* compat */
#define CBRK CEOL