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/*
* Copyright (c) 1988 Mark Nudleman
* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)less.h 8.1 (Berkeley) 6/6/93
*
* $FreeBSD$
*/
#define MAXVARLENGTH (20)
#define NULL_POSITION ((off_t)(-1))
#define EOI (0)
#define READ_INTR (-2)
/* Special chars used to tell put_line() to do something special */
#define UL_CHAR '\201' /* Enter underline mode */
#define UE_CHAR '\202' /* Exit underline mode */
#define BO_CHAR '\203' /* Enter boldface mode */
#define BE_CHAR '\204' /* Exit boldface mode */
#define CONTROL_CHAR(c) (!isprint(c))
#define CARAT_CHAR(c) ((c == '\177') ? '?' : (c | 0100))
#define TOP (0)
#define TOP_PLUS_ONE (1)
#define BOTTOM (-1)
#define BOTTOM_PLUS_ONE (-2)
#define MIDDLE (-3)
/* The return type of runmacro() */
enum runmacro { OK=0, TOOMACRO, BADMACRO, NOMACRO, BADCOMMAND };
#define NOFLAGS 0
#define FORCE_OPEN 0 /* edit() flag */
#define NO_FORCE_OPEN 1 /* edit() flag */
#ifdef DEFINEGLOBALS
#define GLOBAL(var, val) var = val
#else
#define GLOBAL(var, val) extern var
#endif
/*
* This style of error-reporting (see also command.c) is only used by some
* code. Eventually most of the code should use it, since it is becoming
* inconvenient to have John Q. random function() calling error().
*
* This style of error-reporting still leaves somewhat to be desired....
*
* Note that more(1) needs to potentially work under low-memory conditions
* (such as may occur when all available memory has been sucked-up by
* the file buffer in ch.c).
*/
/* Be careful about ordering correctly!! (must match deferrinit_) */
enum error { E_OK=0, E_AMBIG, E_BADMATH, E_BADVAR, E_BOGCOM, E_CANTPARSE,
E_CANTXPND, E_COMPLIM, E_EXTERN, E_NOMAC, E_MALLOC, E_NONUM,
E_NOSTR, E_NOTOG, E_NULL };
/* Listed here for reference only. Be careful about ordering correctly!! */
#define deferrinit_ { \
"", /* E_OK */ \
"ambigious macro", /* E_AMBIG */ \
"invalid arithmetic expression", /* E_BADMATH */ \
"bad variable", /* E_BADVAR */ \
"bogus command", /* E_BOGCOM */ \
"could not parse command string", /* E_CANTPARSE */ \
"could not expand macro", /* E_CANTXPND */ \
"compile time limit", /* E_COMPLIM */ \
"external dependency error", /* E_EXTERN */ \
"could not find match for macro", /* E_NOMAC */ \
"malloc() failed", /* E_MALLOC */ \
"missing numeric argument to command", /* E_NONUM */ \
"missing string argument to command", /* E_NOSTR */ \
"bad n-toggle argument to command", /* E_NOTOG */ \
"to the unknown error", /* E_NULL */ \
}
GLOBAL(const char *deferr[], deferrinit_ );
/*
* It is possible for erreur to become unsynchronized from errstr if
* its users aren't careful. Access through the macros is considered
* careful.
*/
GLOBAL(enum error erreur, NULL);
GLOBAL(char *errstr, NULL); /* must point be null or free()'ble */
#define SETERR(e) do { \
erreur = (e); \
if (errstr) free(errstr); \
errstr = NULL; \
} while (0)
/* SETERRSTR() also exists. It is in command.c */
/*
* An emalloc() traditionally never fails, but fmalloc() may fail, hence
* the non-standard name. The fmalloc() is just syntactic sugar that sets
* erreur for the user.
*
* fmalloc(size, pointer-to-new-memory);
*
* Don't compile this puppy with -Wall or she'll squeel loud!
*/
#define FMALLOC(s,v) ((((v) = malloc(s)) ? 0 : \
((errstr ? free(errstr), errstr=NULL : 0), erreur = E_MALLOC)), (v))
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