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Trailing-Edge - PDP-10 Archives - SRI_NIC_PERM_SRC_3_19910112 - unix-stuff/cmswi.cnf
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_ Author: Andrew Lowry
_
_ Columbia University Center for Computing Activities, July 1986.
_ Copyright (C) 1986, 1987, Trustees of Columbia University in the
_ City of New York.  Permission is granted to any individual or
_ institution to use, copy, or redistribute this software so long as
_ it is not sold for profit, provided this copyright notice is
_ retained.
_

/* switch parsing errors */

fnerror(NM,`Does not match switch')
fnerror(AMB,`Ambiguous')
fnerror(ABR,`Invalid abbreviation chain in switch table')
fnerror(BEG,`Switch does not begin with required punctuation')
fnerror(END,`Final switch punctuation not allowed on selected switch')

/*
 * SWTCH structure specifies one entry in a switch table.  SWITAB
 * structure describes a table of switches.  (We use the name
 * swtch instead of switch because the latter is a C reserved word.)
 */

typedef struct SWTCH {
	char *	_swswi;		/* switch string (without punctuation)  */
	short	_swflg;		/* flags (see below) */
	int	_swval;		/* arbitrary value, not used internally */
				/*  except for abbreviations... see SWI_ABR */
				/*  flag below */
} swtch;

typedef struct SWITAB {
	int	_stcnt;		/* number of switches in table */
	swtch  * _stwds;	/* array of switch entries  */
} switab;

/* Flags that can be present in a switch entry */

fnflag(ABR)			/* switch is an abbreviation for the */
				/* switch indexed by this entry's _swval */
				/* value */
fnflag(NOR)			/* Ignore this switch (do not recognize */
				/*  any prefix, or even an exact match) */
fnflag(INV)			/* Invisible switch (not shown with help) */
fnflag(MAT)			/* This switch matches current input (used */
				/*  internally) */