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