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1 /* general.h -- Some generally useful defines. */ |
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2 |
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3 /* This file is part of GNU Info, a program for reading online documentation |
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4 stored in Info format. |
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5 |
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6 Copyright (C) 1993 Free Software Foundation, Inc. |
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7 |
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8 This program is free software; you can redistribute it and/or modify |
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9 it under the terms of the GNU General Public License as published by |
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10 the Free Software Foundation; either version 2, or (at your option) |
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11 any later version. |
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12 |
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13 This program is distributed in the hope that it will be useful, |
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14 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 GNU General Public License for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with this program; if not, write to the Free Software |
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20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 |
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22 Written by Brian Fox (bfox@ai.mit.edu). */ |
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23 |
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24 #if !defined (_GENERAL_H_) |
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25 #define _GENERAL_H_ |
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26 |
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27 extern void *xmalloc (), *xrealloc (); |
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28 |
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29 #if defined (HAVE_UNISTD_H) |
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30 # include <unistd.h> |
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31 #endif /* HAVE_UNISTD_H */ |
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32 |
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33 #if defined (HAVE_STRING_H) |
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34 # include <string.h> |
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35 #else |
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36 # include <strings.h> |
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37 #endif /* !HAVE_STRING_H */ |
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38 |
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39 #if !defined (savestring) |
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40 # define savestring(x) (char *)strcpy ((char *)xmalloc (1 + strlen (x)), x) |
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41 #endif /* !savestring */ |
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42 |
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43 #define info_toupper(x) (islower (x) ? toupper (x) : x) |
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44 #define info_tolower(x) (isupper (x) ? tolower (x) : x) |
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45 |
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46 #if !defined (whitespace) |
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47 # define whitespace(c) ((c == ' ') || (c == '\t')) |
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48 #endif /* !whitespace */ |
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49 |
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50 #if !defined (whitespace_or_newline) |
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51 # define whitespace_or_newline(c) (whitespace (c) || (c == '\n')) |
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52 #endif /* !whitespace_or_newline */ |
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53 |
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54 #if !defined (__FUNCTION_DEF) |
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55 # define __FUNCTION_DEF |
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56 typedef int Function (); |
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57 typedef void VFunction (); |
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58 #endif /* _FUNCTION_DEF */ |
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59 |
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60 /* Add POINTER to the list of pointers found in ARRAY. SLOTS is the number |
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61 of slots that have already been allocated. INDEX is the index into the |
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62 array where POINTER should be added. GROW is the number of slots to grow |
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63 ARRAY by, in the case that it needs growing. TYPE is a cast of the type |
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64 of object stored in ARRAY (e.g., NODE_ENTRY *. */ |
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65 #define add_pointer_to_array(pointer, idx, array, slots, grow, type) \ |
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66 do { \ |
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67 if (idx + 2 >= slots) \ |
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68 array = (type *)(xrealloc (array, (slots += grow) * sizeof (type))); \ |
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69 array[idx++] = (type)pointer; \ |
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70 array[idx] = (type)NULL; \ |
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71 } while (0) |
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72 |
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73 #define maybe_free(x) do { if (x) free (x); } while (0) |
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74 |
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75 #if !defined (HAVE_BZERO) |
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76 # define zero_mem(mem, length) memset (mem, 0, length) |
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77 #else |
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78 # define zero_mem(mem, length) bzero (mem, length) |
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79 #endif /* !BZERO_MISSING */ |
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80 |
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81 #endif /* !_GENERAL_H_ */ |
