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95 lines
2.9 KiB
C
95 lines
2.9 KiB
C
/* general.h -- Some generally useful defines. */
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/* This file is part of GNU Info, a program for reading online documentation
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stored in Info format.
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Copyright (C) 1993 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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Written by Brian Fox (bfox@ai.mit.edu). */
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#if !defined (_GENERAL_H_)
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#define _GENERAL_H_
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extern void *xmalloc (), *xrealloc ();
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#if defined (HAVE_UNISTD_H)
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# include <unistd.h>
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#endif /* HAVE_UNISTD_H */
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#if defined (HAVE_STRING_H)
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# include <string.h>
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#else
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# include <strings.h>
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#endif /* !HAVE_STRING_H */
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#include "clib.h"
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#define info_toupper(x) (islower (x) ? toupper (x) : x)
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#define info_tolower(x) (isupper (x) ? tolower (x) : x)
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#if !defined (whitespace)
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# define whitespace(c) ((c == ' ') || (c == '\t'))
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#endif /* !whitespace */
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#if !defined (whitespace_or_newline)
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# define whitespace_or_newline(c) (whitespace (c) || (c == '\n'))
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#endif /* !whitespace_or_newline */
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#if !defined (__FUNCTION_DEF)
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# define __FUNCTION_DEF
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typedef int Function ();
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typedef void VFunction ();
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typedef char *CFunction ();
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#endif /* _FUNCTION_DEF */
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/* Add POINTER to the list of pointers found in ARRAY. SLOTS is the number
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of slots that have already been allocated. INDEX is the index into the
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array where POINTER should be added. GROW is the number of slots to grow
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ARRAY by, in the case that it needs growing. TYPE is a cast of the type
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of object stored in ARRAY (e.g., NODE_ENTRY *. */
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#define add_pointer_to_array(pointer, idx, array, slots, grow, type) \
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do { \
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if (idx + 2 >= slots) \
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array = (type *)(xrealloc (array, (slots += grow) * sizeof (type))); \
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array[idx++] = (type)pointer; \
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array[idx] = (type)NULL; \
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} while (0)
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#define maybe_free(x) do { if (x) free (x); } while (0)
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#if !defined (zero_mem) && defined (HAVE_MEMSET)
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# define zero_mem(mem, length) memset (mem, 0, length)
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#endif /* !zero_mem && HAVE_MEMSET */
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#if !defined (zero_mem) && defined (HAVE_BZERO)
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# define zero_mem(mem, length) bzero (mem, length)
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#endif /* !zero_mem && HAVE_BZERO */
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#if !defined (zero_mem)
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# define zero_mem(mem, length) \
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do { \
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register int zi; \
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register unsigned char *place; \
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\
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place = (unsigned char *)mem; \
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for (zi = 0; zi < length; zi++) \
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place[zi] = 0; \
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} while (0)
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#endif /* !zero_mem */
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#endif /* !_GENERAL_H_ */
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