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Length: 2009 (0x7d9)
Types: TextFile
Notes: UNIX file
Names: »strselect.h«
└─⟦7decd0fac⟧ Bits:30004155/disk4.imd SW95713I 386/ix Software Development System Rel. 2.0
└─⟦7decd0fac⟧ UNIX Filesystem
└─⟦this⟧ »sd/new/usr/include/strselect.h«
/* Copyright (c) 1984 AT&T */
/* All Rights Reserved */
/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
/* The copyright notice above does not evidence any */
/* actual or intended publication of such source code. */
#ident "@(#)strselect.h 2.3 - 88/05/27"
/* defines for the STRSELECT construct
for selecting among character strings
Typical use:
char string[100];
gets( string );
STRSELECT( string )
WHEN2( "y", "yes" ) /* only accept "y" or "yes" *
yescode();
WHENN( "n" ) /* anything beginning "n" is no *
nocode();
DEFAULT
tryagain();
ENDSEL
Note:
No {}s are used.
No : after WHEN().
WHENs do not fall through.
WHENs are evaluated in order.
DEFAULT should be last, if present.
*/
/* Hide characters from the preprocessor so it won't rescan them.
This allows us to contruct comment delimiters, e.g. "/*", that are
not stripped by the preprocessor and hence get through to the compiler.
STRSELECT depends on this working.
*/
#define WoRD(x)x
#define STRSELECT(a) { char *STRSeLeCT; STRSeLeCT = a; WoRD(/)WoRD(*)
#define WHEN(a) } else WoRD(/)WoRD(*) WoRD(*)WoRD(/) \
if( !strcmp(STRSeLeCT, a) ) {
#define WHEN2(a1,a2) } else WoRD(/)WoRD(*) WoRD(*)WoRD(/)\
if( !strcmp(STRSeLeCT, a1) || !strcmp(STRSeLeCT, a2) ) {
#define WHEN3(a1,a2,a3) } else WoRD(/)WoRD(*) WoRD(*)WoRD(/)\
if( !strcmp(STRSeLeCT, a1) || !strcmp(STRSeLeCT, a2) ||\
!strcmp(STRSeLeCT, a3) ) {
#define WHENN(a) } else WoRD(/)WoRD(*) WoRD(*)WoRD(/)\
if( !strncmp(STRSeLeCT, a, sizeof(a)-1) ) {
#define WHENN2(a1,a2) } else WoRD(/)WoRD(*) WoRD(*)WoRD(/)\
if( !strncmp(STRSeLeCT, a1, sizeof(a1)-1) ||\
!strncmp(STRSeLeCT, a2, sizeof(a2)-1) ) {
#define WHENN3(a1,a2,a3) } else WoRD(/)WoRD(*) WoRD(*)WoRD(/)\
if( !strncmp(STRSeLeCT, a1, sizeof(a1)-1) ||\
!strncmp(STRSeLeCT, a2, sizeof(a2)-1) ||\
!strncmp(STRSeLeCT, a3, sizeof(a3)-1) ) {
#define DEFAULT } else WoRD(/)WoRD(*) WoRD(*)WoRD(/) {
#define ENDSEL } WoRD(/)WoRD(*) WoRD(*)WoRD(/) }