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1 /* search.h -- Structure used to search large bodies of text, with bounds. */ |
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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 /* The search functions take two arguments: |
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25 |
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26 1) a string to search for, and |
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27 |
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28 2) a pointer to a SEARCH_BINDING which contains the buffer, start, |
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29 and end of the search. |
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30 |
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31 They return a long, which is the offset from the start of the buffer |
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32 at which the match was found. An offset of -1 indicates failure. */ |
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33 |
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34 #if !defined (_SEARCH_H_) |
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35 #define _SEARCH_H_ |
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36 |
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37 typedef struct { |
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38 char *buffer; /* The buffer of text to search. */ |
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39 long start; /* Offset of the start of the search. */ |
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40 long end; /* Offset of the end of the searh. */ |
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41 int flags; /* Flags controlling the type of search. */ |
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42 } SEARCH_BINDING; |
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43 |
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44 #define S_FoldCase 0x01 /* Set means fold case in searches. */ |
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45 #define S_SkipDest 0x02 /* Set means return pointing after the dest. */ |
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46 |
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47 SEARCH_BINDING *make_binding (), *copy_binding (); |
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48 extern long search_forward (), search_backward (), search (); |
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49 extern int looking_at (); |
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50 |
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51 /* Note that STRING_IN_LINE () always returns the offset of the 1st character |
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52 after the string. */ |
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53 extern int string_in_line (); |
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54 |
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55 /* Unix doesn't have stricmp () functions. */ |
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56 /* strcmp (), but caseless. */ |
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57 extern int stricmp (); |
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58 |
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59 /* Compare at most COUNT characters from STRING1 to STRING2. Case |
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60 doesn't matter. */ |
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61 extern int strnicmp (); |
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62 |
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63 /* Function names that start with "skip" are passed a string, and return |
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64 an offset from the start of that string. Function names that start |
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65 with "find" are passed a SEARCH_BINDING, and return an absolute position |
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66 marker of the item being searched for. "Find" functions return a value |
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67 of -1 if the item being looked for couldn't be found. */ |
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68 extern int skip_whitespace (), skip_non_whitespace (); |
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69 extern int skip_whitespace_and_newlines (), skip_line (); |
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70 extern int skip_node_characters (), skip_node_separator (); |
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71 #define DONT_SKIP_NEWLINES 0 |
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72 #define SKIP_NEWLINES 1 |
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73 |
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74 extern long find_node_separator (), find_tags_table (); |
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75 extern long find_node_in_binding (); |
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76 |
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77 #endif /* !_SEARCH_H_ */ |
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78 |
