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76 lines
2.8 KiB
C
76 lines
2.8 KiB
C
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/* search.h -- Structure used to search large bodies of text, with bounds. */
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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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/* The search functions take two arguments:
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1) a string to search for, and
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2) a pointer to a SEARCH_BINDING which contains the buffer, start,
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and end of the search.
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They return a long, which is the offset from the start of the buffer
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at which the match was found. An offset of -1 indicates failure. */
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#if !defined (_SEARCH_H_)
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#define _SEARCH_H_
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typedef struct {
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char *buffer; /* The buffer of text to search. */
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long start; /* Offset of the start of the search. */
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long end; /* Offset of the end of the searh. */
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int flags; /* Flags controlling the type of search. */
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} SEARCH_BINDING;
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#define S_FoldCase 0x01 /* Set means fold case in searches. */
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#define S_SkipDest 0x02 /* Set means return pointing after the dest. */
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SEARCH_BINDING *make_binding (), *copy_binding ();
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extern long search_forward (), search_backward (), search ();
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extern int looking_at ();
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/* Note that STRING_IN_LINE () always returns the offset of the 1st character
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after the string. */
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extern int string_in_line ();
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/* Some unixes don't have strcasecmp or strncasecmp. */
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#if !defined (HAVE_STRCASECMP)
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extern int strcasecmp (), strncasecmp ();
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#endif /* !HAVE_STRCASECMP */
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/* Function names that start with "skip" are passed a string, and return
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an offset from the start of that string. Function names that start
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with "find" are passed a SEARCH_BINDING, and return an absolute position
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marker of the item being searched for. "Find" functions return a value
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of -1 if the item being looked for couldn't be found. */
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extern int skip_whitespace (), skip_non_whitespace ();
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extern int skip_whitespace_and_newlines (), skip_line ();
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extern int skip_node_characters (), skip_node_separator ();
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#define DONT_SKIP_NEWLINES 0
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#define SKIP_NEWLINES 1
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extern long find_node_separator (), find_tags_table ();
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extern long find_node_in_binding ();
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#endif /* !_SEARCH_H_ */
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