readline/histlib.h

   1 /* histlib.h -- internal definitions for the history library. */
   2 /* Copyright (C) 1989, 1992 Free Software Foundation, Inc.
   3
   4    This file contains the GNU History Library (the Library), a set of
   5    routines for managing the text of previously typed lines.
   6
   7    The Library is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2, or (at your option)
  10    any later version.
  11
  12    The Library is distributed in the hope that it will be useful, but
  13    WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    General Public License for more details.
  16
  17    The GNU General Public License is often shipped with GNU software, and
  18    is generally kept in a file called COPYING or LICENSE.  If you do not
  19    have a copy of the license, write to the Free Software Foundation,
  20    59 Temple Place, Suite 330, Boston, MA 02111 USA. */
  21
  22 #if !defined (_HISTLIB_H_)
  23 #define _HISTLIB_H_
  24
  25 /* Function pointers can be declared as (Function *)foo. */
  26 #if !defined (_FUNCTION_DEF)
  27 #  define _FUNCTION_DEF
  28 typedef int Function ();
  29 typedef void VFunction ();
  30 typedef char *CPFunction ();
  31 typedef char **CPPFunction ();
  32 #endif /* _FUNCTION_DEF */
  33
  34 #if !defined (STREQ)
  35 #define STREQ(a, b)     (((a)[0] == (b)[0]) && (strcmp ((a), (b)) == 0))
  36 #define STREQN(a, b, n) (((n) == 0) ? (1) \
  37                                     : ((a)[0] == (b)[0]) && (strncmp ((a), (b), (n)) == 0))
  38 #endif
  39
  40 #ifndef savestring
  41 #  ifndef strcpy
  42 extern char *strcpy ();
  43 #  endif
  44 #define savestring(x) strcpy (xmalloc (1 + strlen (x)), (x))
  45 #endif
  46
  47 #ifndef whitespace
  48 #define whitespace(c) (((c) == ' ') || ((c) == '\t'))
  49 #endif
  50
  51 #ifndef _rl_digit_p
  52 #define _rl_digit_p(c)  ((c) >= '0' && (c) <= '9')
  53 #endif
  54
  55 #ifndef _rl_digit_value
  56 #define _rl_digit_value(c) ((c) - '0')
  57 #endif
  58
  59 #ifndef member
  60 #  ifndef strchr
  61 extern char *strchr ();
  62 #  endif
  63 #define member(c, s) ((c) ? ((char *)strchr ((s), (c)) != (char *)NULL) : 0)
  64 #endif
  65
  66 #ifndef FREE
  67 #  define FREE(x)       if (x) free (x)
  68 #endif
  69
  70 /* Possible history errors passed to hist_error. */
  71 #define EVENT_NOT_FOUND 0
  72 #define BAD_WORD_SPEC   1
  73 #define SUBST_FAILED    2
  74 #define BAD_MODIFIER    3
  75 #define NO_PREV_SUBST   4
  76
  77 /* Possible definitions for history starting point specification. */
  78 #define ANCHORED_SEARCH 1
  79 #define NON_ANCHORED_SEARCH 0
  80
  81 /* Possible definitions for what style of writing the history file we want. */
  82 #define HISTORY_APPEND 0
  83 #define HISTORY_OVERWRITE 1
  84
  85 /* Some variable definitions shared across history source files. */
  86 extern int history_offset;
  87
  88 #endif /* !_HISTLIB_H_ */