1453 lines
29 KiB
C
1453 lines
29 KiB
C
/* $NetBSD: search.c,v 1.10 2006/10/26 01:33:08 mrg Exp $ */
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/*
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* Copyright (C) 1984-2005 Mark Nudelman
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*
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* You may distribute under the terms of either the GNU General Public
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* License or the Less License, as specified in the README file.
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*
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* For more information about less, or for information on how to
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* contact the author, see the README file.
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*/
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/*
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* Routines to search a file for a pattern.
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*/
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#include "less.h"
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#include "position.h"
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#define MINPOS(a,b) (((a) < (b)) ? (a) : (b))
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#define MAXPOS(a,b) (((a) > (b)) ? (a) : (b))
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#if HAVE_POSIX_REGCOMP
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#include <regex.h>
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#ifdef REG_EXTENDED
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#define REGCOMP_FLAG (more_mode ? 0 : REG_EXTENDED)
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#else
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#define REGCOMP_FLAG 0
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#endif
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#endif
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#if HAVE_PCRE
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#include <pcre.h>
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#endif
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#if HAVE_RE_COMP
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char *re_comp();
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int re_exec();
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#endif
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#if HAVE_REGCMP
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char *regcmp();
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char *regex();
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extern char *__loc1;
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#endif
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#if HAVE_V8_REGCOMP
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#include "regexp.h"
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#endif
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static void cvt_text __P((char *, char *, int));
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static int is_ucase __P((char *));
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static int prev_pattern __P((void));
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static int compile_pattern __P((char *, int));
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static void uncompile_pattern __P((void));
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static int match_pattern __P((char *, char **, char **, int));
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struct hilite;
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static void add_hilite __P((struct hilite *, struct hilite *));
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static void adj_hilite __P((struct hilite *, POSITION, int));
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static void hilite_line __P((POSITION, char *, char *, char *, int));
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static void hilite_screen __P((void));
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static POSITION search_pos __P((int));
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static int search_range __P((POSITION, POSITION, int, int, int, POSITION *, POSITION *));
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static int match __P((char *, char *, char **, char **));
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extern int sigs;
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extern int how_search;
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extern int caseless;
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extern int linenums;
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extern int sc_height;
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extern int jump_sline;
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extern int bs_mode;
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extern int ctldisp;
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extern int status_col;
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extern int more_mode;
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extern POSITION start_attnpos;
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extern POSITION end_attnpos;
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#if HILITE_SEARCH
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extern int hilite_search;
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extern int screen_trashed;
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extern int size_linebuf;
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extern int squished;
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extern int can_goto_line;
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static int hide_hilite;
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static POSITION prep_startpos;
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static POSITION prep_endpos;
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struct hilite
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{
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struct hilite *hl_next;
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POSITION hl_startpos;
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POSITION hl_endpos;
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};
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static struct hilite hilite_anchor = { NULL, NULL_POSITION, NULL_POSITION };
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#define hl_first hl_next
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#endif
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/*
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* These are the static variables that represent the "remembered"
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* search pattern.
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*/
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#if HAVE_POSIX_REGCOMP
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static regex_t *regpattern = NULL;
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#endif
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#if HAVE_PCRE
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pcre *regpattern = NULL;
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#endif
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#if HAVE_RE_COMP
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int re_pattern = 0;
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#endif
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#if HAVE_REGCMP
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static char *cpattern = NULL;
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#endif
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#if HAVE_V8_REGCOMP
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static struct regexp *regpattern = NULL;
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#endif
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static int is_caseless;
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static int is_ucase_pattern;
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static int last_search_type;
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static char *last_pattern = NULL;
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/*
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* Convert text. Perform one or more of these transformations:
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*/
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#define CVT_TO_LC 01 /* Convert upper-case to lower-case */
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#define CVT_BS 02 /* Do backspace processing */
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#define CVT_CRLF 04 /* Remove CR after LF */
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#define CVT_ANSI 010 /* Remove ANSI escape sequences */
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static void
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cvt_text(odst, osrc, ops)
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char *odst;
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char *osrc;
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int ops;
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{
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register char *dst;
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register char *src;
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for (src = osrc, dst = odst; *src != '\0'; src++)
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{
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if ((ops & CVT_TO_LC) && IS_UPPER(*src))
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/* Convert uppercase to lowercase. */
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*dst++ = TO_LOWER(*src);
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else if ((ops & CVT_BS) && *src == '\b' && dst > odst)
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/* Delete BS and preceding char. */
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dst--;
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else if ((ops & CVT_ANSI) && *src == ESC)
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{
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/* Skip to end of ANSI escape sequence. */
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while (src[1] != '\0')
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if (!is_ansi_middle(*++src))
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break;
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} else
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/* Just copy. */
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*dst++ = *src;
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}
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if ((ops & CVT_CRLF) && dst > odst && dst[-1] == '\r')
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dst--;
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*dst = '\0';
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}
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/*
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* Determine which conversions to perform.
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*/
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static int
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get_cvt_ops()
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{
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int ops = 0;
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if (is_caseless || bs_mode == BS_SPECIAL)
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{
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if (is_caseless)
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ops |= CVT_TO_LC;
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if (bs_mode == BS_SPECIAL)
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ops |= CVT_BS;
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if (bs_mode != BS_CONTROL)
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ops |= CVT_CRLF;
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} else if (bs_mode != BS_CONTROL)
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{
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ops |= CVT_CRLF;
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}
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if (ctldisp == OPT_ONPLUS)
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ops |= CVT_ANSI;
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return (ops);
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}
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/*
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* Are there any uppercase letters in this string?
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*/
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static int
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is_ucase(s)
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char *s;
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{
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register char *p;
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for (p = s; *p != '\0'; p++)
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if (IS_UPPER(*p))
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return (1);
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return (0);
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}
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/*
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* Is there a previous (remembered) search pattern?
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*/
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static int
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prev_pattern()
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{
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if (last_search_type & SRCH_NO_REGEX)
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return (last_pattern != NULL);
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#if HAVE_POSIX_REGCOMP
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return (regpattern != NULL);
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#endif
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#if HAVE_PCRE
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return (regpattern != NULL);
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#endif
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#if HAVE_RE_COMP
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return (re_pattern != 0);
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#endif
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#if HAVE_REGCMP
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return (cpattern != NULL);
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#endif
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#if HAVE_V8_REGCOMP
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return (regpattern != NULL);
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#endif
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#if NO_REGEX
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return (last_pattern != NULL);
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#endif
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}
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#if HILITE_SEARCH
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/*
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* Repaint the hilites currently displayed on the screen.
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* Repaint each line which contains highlighted text.
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* If on==0, force all hilites off.
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*/
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public void
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repaint_hilite(on)
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int on;
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{
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int slinenum;
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POSITION pos;
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POSITION epos;
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int save_hide_hilite;
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if (squished)
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repaint();
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save_hide_hilite = hide_hilite;
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if (!on)
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{
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if (hide_hilite)
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return;
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hide_hilite = 1;
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}
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if (!can_goto_line)
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{
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repaint();
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hide_hilite = save_hide_hilite;
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return;
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}
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for (slinenum = TOP; slinenum < TOP + sc_height-1; slinenum++)
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{
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pos = position(slinenum);
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if (pos == NULL_POSITION)
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continue;
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epos = position(slinenum+1);
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#if 0
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/*
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* If any character in the line is highlighted,
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* repaint the line.
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*
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* {{ This doesn't work -- if line is drawn with highlights
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* which should be erased (e.g. toggle -i with status column),
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* we must redraw the line even if it has no highlights.
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* For now, just repaint every line. }}
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*/
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if (is_hilited(pos, epos, 1, NULL))
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#endif
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{
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(void) forw_line(pos);
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goto_line(slinenum);
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put_line();
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}
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}
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hide_hilite = save_hide_hilite;
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}
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/*
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* Clear the attn hilite.
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*/
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public void
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clear_attn()
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{
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int slinenum;
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POSITION old_start_attnpos;
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POSITION old_end_attnpos;
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POSITION pos;
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POSITION epos;
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if (start_attnpos == NULL_POSITION)
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return;
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old_start_attnpos = start_attnpos;
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old_end_attnpos = end_attnpos;
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start_attnpos = end_attnpos = NULL_POSITION;
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if (!can_goto_line)
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{
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repaint();
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return;
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}
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if (squished)
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repaint();
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for (slinenum = TOP; slinenum < TOP + sc_height-1; slinenum++)
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{
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pos = position(slinenum);
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if (pos == NULL_POSITION)
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continue;
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epos = position(slinenum+1);
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if (pos < old_end_attnpos &&
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(epos == NULL_POSITION || epos > old_start_attnpos))
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{
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(void) forw_line(pos);
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goto_line(slinenum);
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put_line();
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}
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}
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}
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#endif
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/*
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* Hide search string highlighting.
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*/
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public void
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undo_search()
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{
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if (!prev_pattern())
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{
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error("No previous regular expression", NULL_PARG);
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return;
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}
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#if HILITE_SEARCH
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hide_hilite = !hide_hilite;
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repaint_hilite(1);
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#endif
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}
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/*
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* Compile a search pattern, for future use by match_pattern.
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*/
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static int
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compile_pattern(pattern, search_type)
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char *pattern;
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int search_type;
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{
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if ((search_type & SRCH_NO_REGEX) == 0)
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{
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#if HAVE_POSIX_REGCOMP
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regex_t *s = (regex_t *) ecalloc(1, sizeof(regex_t));
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if (regcomp(s, pattern, REGCOMP_FLAG))
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{
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free(s);
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error("Invalid pattern", NULL_PARG);
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return (-1);
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}
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if (regpattern != NULL)
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regfree(regpattern);
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regpattern = s;
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#endif
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#if HAVE_PCRE
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pcre *comp;
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const char *errstring;
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int erroffset;
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PARG parg;
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comp = pcre_compile(pattern, 0,
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&errstring, &erroffset, NULL);
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if (comp == NULL)
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{
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parg.p_string = (char *) errstring;
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error("%s", &parg);
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return (-1);
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}
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regpattern = comp;
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#endif
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#if HAVE_RE_COMP
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PARG parg;
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if ((parg.p_string = re_comp(pattern)) != NULL)
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{
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error("%s", &parg);
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return (-1);
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}
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re_pattern = 1;
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#endif
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#if HAVE_REGCMP
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char *s;
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if ((s = regcmp(pattern, 0)) == NULL)
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{
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error("Invalid pattern", NULL_PARG);
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return (-1);
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}
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if (cpattern != NULL)
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free(cpattern);
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cpattern = s;
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#endif
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#if HAVE_V8_REGCOMP
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struct regexp *s;
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if ((s = regcomp(pattern)) == NULL)
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{
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/*
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* regcomp has already printed an error message
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* via regerror().
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*/
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return (-1);
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}
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if (regpattern != NULL)
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free(regpattern);
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regpattern = s;
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#endif
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}
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if (last_pattern != NULL)
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free(last_pattern);
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last_pattern = (char *) calloc(1, strlen(pattern)+1);
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if (last_pattern != NULL)
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strcpy(last_pattern, pattern);
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last_search_type = search_type;
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return (0);
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}
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/*
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* Forget that we have a compiled pattern.
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*/
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static void
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uncompile_pattern()
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{
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#if HAVE_POSIX_REGCOMP
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if (regpattern != NULL)
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regfree(regpattern);
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regpattern = NULL;
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#endif
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#if HAVE_PCRE
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if (regpattern != NULL)
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pcre_free(regpattern);
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regpattern = NULL;
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#endif
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#if HAVE_RE_COMP
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re_pattern = 0;
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#endif
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#if HAVE_REGCMP
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if (cpattern != NULL)
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free(cpattern);
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cpattern = NULL;
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#endif
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#if HAVE_V8_REGCOMP
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if (regpattern != NULL)
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free(regpattern);
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regpattern = NULL;
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#endif
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last_pattern = NULL;
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}
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/*
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* Perform a pattern match with the previously compiled pattern.
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* Set sp and ep to the start and end of the matched string.
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*/
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static int
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match_pattern(line, sp, ep, notbol)
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char *line;
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char **sp;
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char **ep;
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int notbol;
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{
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int matched;
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if (last_search_type & SRCH_NO_REGEX)
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return (match(last_pattern, line, sp, ep));
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#if HAVE_POSIX_REGCOMP
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{
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regmatch_t rm;
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int flags = (notbol) ? REG_NOTBOL : 0;
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matched = !regexec(regpattern, line, 1, &rm, flags);
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if (!matched)
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return (0);
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#ifndef __WATCOMC__
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*sp = line + rm.rm_so;
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*ep = line + rm.rm_eo;
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#else
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*sp = rm.rm_sp;
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*ep = rm.rm_ep;
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#endif
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}
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#endif
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#if HAVE_PCRE
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{
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int flags = (notbol) ? PCRE_NOTBOL : 0;
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int ovector[3];
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matched = pcre_exec(regpattern, NULL, line, strlen(line),
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0, flags, ovector, 3) >= 0;
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if (!matched)
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return (0);
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*sp = line + ovector[0];
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*ep = line + ovector[1];
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}
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#endif
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#if HAVE_RE_COMP
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matched = (re_exec(line) == 1);
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/*
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* re_exec doesn't seem to provide a way to get the matched string.
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*/
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*sp = *ep = NULL;
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#endif
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#if HAVE_REGCMP
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*ep = regex(cpattern, line);
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matched = (*ep != NULL);
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if (!matched)
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return (0);
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*sp = __loc1;
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#endif
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#if HAVE_V8_REGCOMP
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#if HAVE_REGEXEC2
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matched = regexec2(regpattern, line, notbol);
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#else
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matched = regexec(regpattern, line);
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#endif
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if (!matched)
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return (0);
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*sp = regpattern->startp[0];
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*ep = regpattern->endp[0];
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#endif
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#if NO_REGEX
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matched = match(last_pattern, line, sp, ep);
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#endif
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return (matched);
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}
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#if HILITE_SEARCH
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/*
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* Clear the hilite list.
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*/
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public void
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clr_hilite()
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{
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struct hilite *hl;
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struct hilite *nexthl;
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for (hl = hilite_anchor.hl_first; hl != NULL; hl = nexthl)
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{
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nexthl = hl->hl_next;
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free((void*)hl);
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}
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hilite_anchor.hl_first = NULL;
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prep_startpos = prep_endpos = NULL_POSITION;
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}
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|
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/*
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* Should any characters in a specified range be highlighted?
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*/
|
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static int
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is_hilited_range(pos, epos)
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POSITION pos;
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POSITION epos;
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{
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struct hilite *hl;
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|
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/*
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* Look at each highlight and see if any part of it falls in the range.
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*/
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for (hl = hilite_anchor.hl_first; hl != NULL; hl = hl->hl_next)
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{
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if (hl->hl_endpos > pos &&
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(epos == NULL_POSITION || epos > hl->hl_startpos))
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return (1);
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}
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return (0);
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}
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/*
|
|
* Should any characters in a specified range be highlighted?
|
|
* If nohide is nonzero, don't consider hide_hilite.
|
|
*/
|
|
public int
|
|
is_hilited(pos, epos, nohide, p_matches)
|
|
POSITION pos;
|
|
POSITION epos;
|
|
int nohide;
|
|
int *p_matches;
|
|
{
|
|
int match;
|
|
|
|
if (p_matches != NULL)
|
|
*p_matches = 0;
|
|
|
|
if (!status_col &&
|
|
start_attnpos != NULL_POSITION &&
|
|
pos < end_attnpos &&
|
|
(epos == NULL_POSITION || epos > start_attnpos))
|
|
/*
|
|
* The attn line overlaps this range.
|
|
*/
|
|
return (1);
|
|
|
|
match = is_hilited_range(pos, epos);
|
|
if (!match)
|
|
return (0);
|
|
|
|
if (p_matches != NULL)
|
|
/*
|
|
* Report matches, even if we're hiding highlights.
|
|
*/
|
|
*p_matches = 1;
|
|
|
|
if (hilite_search == 0)
|
|
/*
|
|
* Not doing highlighting.
|
|
*/
|
|
return (0);
|
|
|
|
if (!nohide && hide_hilite)
|
|
/*
|
|
* Highlighting is hidden.
|
|
*/
|
|
return (0);
|
|
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Add a new hilite to a hilite list.
|
|
*/
|
|
static void
|
|
add_hilite(anchor, hl)
|
|
struct hilite *anchor;
|
|
struct hilite *hl;
|
|
{
|
|
struct hilite *ihl;
|
|
|
|
/*
|
|
* Hilites are sorted in the list; find where new one belongs.
|
|
* Insert new one after ihl.
|
|
*/
|
|
for (ihl = anchor; ihl->hl_next != NULL; ihl = ihl->hl_next)
|
|
{
|
|
if (ihl->hl_next->hl_startpos > hl->hl_startpos)
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Truncate hilite so it doesn't overlap any existing ones
|
|
* above and below it.
|
|
*/
|
|
if (ihl != anchor)
|
|
hl->hl_startpos = MAXPOS(hl->hl_startpos, ihl->hl_endpos);
|
|
if (ihl->hl_next != NULL)
|
|
hl->hl_endpos = MINPOS(hl->hl_endpos, ihl->hl_next->hl_startpos);
|
|
if (hl->hl_startpos >= hl->hl_endpos)
|
|
{
|
|
/*
|
|
* Hilite was truncated out of existence.
|
|
*/
|
|
free(hl);
|
|
return;
|
|
}
|
|
hl->hl_next = ihl->hl_next;
|
|
ihl->hl_next = hl;
|
|
}
|
|
|
|
static void
|
|
adj_hilite_ansi(cvt_ops, line, npos)
|
|
int cvt_ops;
|
|
char **line;
|
|
POSITION *npos;
|
|
{
|
|
if (cvt_ops & CVT_ANSI)
|
|
while (**line == ESC)
|
|
{
|
|
/*
|
|
* Found an ESC. The file position moves
|
|
* forward past the entire ANSI escape sequence.
|
|
*/
|
|
(*line)++;
|
|
(*npos)++;
|
|
while (**line != '\0')
|
|
{
|
|
(*npos)++;
|
|
if (!is_ansi_middle(*(*line)++))
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Adjust hl_startpos & hl_endpos to account for backspace processing.
|
|
*/
|
|
static void
|
|
adj_hilite(anchor, linepos, cvt_ops)
|
|
struct hilite *anchor;
|
|
POSITION linepos;
|
|
int cvt_ops;
|
|
{
|
|
char *line;
|
|
struct hilite *hl;
|
|
int checkstart;
|
|
POSITION opos;
|
|
POSITION npos;
|
|
|
|
/*
|
|
* The line was already scanned and hilites were added (in hilite_line).
|
|
* But it was assumed that each char position in the line
|
|
* correponds to one char position in the file.
|
|
* This may not be true if there are backspaces in the line.
|
|
* Get the raw line again. Look at each character.
|
|
*/
|
|
(void) forw_raw_line(linepos, &line);
|
|
opos = npos = linepos;
|
|
hl = anchor->hl_first;
|
|
checkstart = TRUE;
|
|
while (hl != NULL)
|
|
{
|
|
/*
|
|
* See if we need to adjust the current hl_startpos or
|
|
* hl_endpos. After adjusting startpos[i], move to endpos[i].
|
|
* After adjusting endpos[i], move to startpos[i+1].
|
|
* The hilite list must be sorted thus:
|
|
* startpos[0] < endpos[0] <= startpos[1] < endpos[1] <= etc.
|
|
*/
|
|
if (checkstart && hl->hl_startpos == opos)
|
|
{
|
|
hl->hl_startpos = npos;
|
|
checkstart = FALSE;
|
|
continue; /* {{ not really necessary }} */
|
|
} else if (!checkstart && hl->hl_endpos == opos)
|
|
{
|
|
hl->hl_endpos = npos;
|
|
checkstart = TRUE;
|
|
hl = hl->hl_next;
|
|
continue; /* {{ necessary }} */
|
|
}
|
|
if (*line == '\0')
|
|
break;
|
|
adj_hilite_ansi(cvt_ops, &line, &npos);
|
|
opos++;
|
|
npos++;
|
|
line++;
|
|
if (cvt_ops & CVT_BS)
|
|
{
|
|
while (*line == '\b')
|
|
{
|
|
npos++;
|
|
line++;
|
|
adj_hilite_ansi(cvt_ops, &line, &npos);
|
|
if (*line == '\0')
|
|
{
|
|
--npos;
|
|
--line;
|
|
break;
|
|
}
|
|
/*
|
|
* Found a backspace. The file position moves
|
|
* forward by 2 relative to the processed line
|
|
* which was searched in hilite_line.
|
|
*/
|
|
npos++;
|
|
line++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Make a hilite for each string in a physical line which matches
|
|
* the current pattern.
|
|
* sp,ep delimit the first match already found.
|
|
*/
|
|
static void
|
|
hilite_line(linepos, line, sp, ep, cvt_ops)
|
|
POSITION linepos;
|
|
char *line;
|
|
char *sp;
|
|
char *ep;
|
|
int cvt_ops;
|
|
{
|
|
char *searchp;
|
|
struct hilite *hl;
|
|
struct hilite hilites;
|
|
|
|
if (sp == NULL || ep == NULL)
|
|
return;
|
|
/*
|
|
* sp and ep delimit the first match in the line.
|
|
* Mark the corresponding file positions, then
|
|
* look for further matches and mark them.
|
|
* {{ This technique, of calling match_pattern on subsequent
|
|
* substrings of the line, may mark more than is correct
|
|
* if the pattern starts with "^". This bug is fixed
|
|
* for those regex functions that accept a notbol parameter
|
|
* (currently POSIX and V8-with-regexec2). }}
|
|
*/
|
|
searchp = line;
|
|
/*
|
|
* Put the hilites into a temporary list until they're adjusted.
|
|
*/
|
|
hilites.hl_first = NULL;
|
|
do {
|
|
if (ep > sp)
|
|
{
|
|
/*
|
|
* Assume that each char position in the "line"
|
|
* buffer corresponds to one char position in the file.
|
|
* This is not quite true; we need to adjust later.
|
|
*/
|
|
hl = (struct hilite *) ecalloc(1, sizeof(struct hilite));
|
|
hl->hl_startpos = linepos + (sp-line);
|
|
hl->hl_endpos = linepos + (ep-line);
|
|
add_hilite(&hilites, hl);
|
|
}
|
|
/*
|
|
* If we matched more than zero characters,
|
|
* move to the first char after the string we matched.
|
|
* If we matched zero, just move to the next char.
|
|
*/
|
|
if (ep > searchp)
|
|
searchp = ep;
|
|
else if (*searchp != '\0')
|
|
searchp++;
|
|
else /* end of line */
|
|
break;
|
|
} while (match_pattern(searchp, &sp, &ep, 1));
|
|
|
|
/*
|
|
* If there were backspaces in the original line, they
|
|
* were removed, and hl_startpos/hl_endpos are not correct.
|
|
* {{ This is very ugly. }}
|
|
*/
|
|
adj_hilite(&hilites, linepos, cvt_ops);
|
|
|
|
/*
|
|
* Now put the hilites into the real list.
|
|
*/
|
|
while ((hl = hilites.hl_next) != NULL)
|
|
{
|
|
hilites.hl_next = hl->hl_next;
|
|
add_hilite(&hilite_anchor, hl);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Change the caseless-ness of searches.
|
|
* Updates the internal search state to reflect a change in the -i flag.
|
|
*/
|
|
public void
|
|
chg_caseless()
|
|
{
|
|
if (!is_ucase_pattern)
|
|
/*
|
|
* Pattern did not have uppercase.
|
|
* Just set the search caselessness to the global caselessness.
|
|
*/
|
|
is_caseless = caseless;
|
|
else
|
|
/*
|
|
* Pattern did have uppercase.
|
|
* Discard the pattern; we can't change search caselessness now.
|
|
*/
|
|
uncompile_pattern();
|
|
}
|
|
|
|
#if HILITE_SEARCH
|
|
/*
|
|
* Find matching text which is currently on screen and highlight it.
|
|
*/
|
|
static void
|
|
hilite_screen()
|
|
{
|
|
struct scrpos scrpos;
|
|
|
|
get_scrpos(&scrpos);
|
|
if (scrpos.pos == NULL_POSITION)
|
|
return;
|
|
prep_hilite(scrpos.pos, position(BOTTOM_PLUS_ONE), -1);
|
|
repaint_hilite(1);
|
|
}
|
|
|
|
/*
|
|
* Change highlighting parameters.
|
|
*/
|
|
public void
|
|
chg_hilite()
|
|
{
|
|
/*
|
|
* Erase any highlights currently on screen.
|
|
*/
|
|
clr_hilite();
|
|
hide_hilite = 0;
|
|
|
|
if (hilite_search == OPT_ONPLUS)
|
|
/*
|
|
* Display highlights.
|
|
*/
|
|
hilite_screen();
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Figure out where to start a search.
|
|
*/
|
|
static POSITION
|
|
search_pos(search_type)
|
|
int search_type;
|
|
{
|
|
POSITION pos;
|
|
int linenum;
|
|
|
|
if (empty_screen())
|
|
{
|
|
/*
|
|
* Start at the beginning (or end) of the file.
|
|
* The empty_screen() case is mainly for
|
|
* command line initiated searches;
|
|
* for example, "+/xyz" on the command line.
|
|
* Also for multi-file (SRCH_PAST_EOF) searches.
|
|
*/
|
|
if (search_type & SRCH_FORW)
|
|
{
|
|
return (ch_zero());
|
|
} else
|
|
{
|
|
pos = ch_length();
|
|
if (pos == NULL_POSITION)
|
|
{
|
|
(void) ch_end_seek();
|
|
pos = ch_length();
|
|
}
|
|
return (pos);
|
|
}
|
|
}
|
|
if (how_search)
|
|
{
|
|
/*
|
|
* Search does not include current screen.
|
|
*/
|
|
if (search_type & SRCH_FORW)
|
|
linenum = BOTTOM_PLUS_ONE;
|
|
else
|
|
linenum = TOP;
|
|
pos = position(linenum);
|
|
} else
|
|
{
|
|
/*
|
|
* Search includes current screen.
|
|
* It starts at the jump target (if searching backwards),
|
|
* or at the jump target plus one (if forwards).
|
|
*/
|
|
linenum = adjsline(jump_sline);
|
|
pos = position(linenum);
|
|
if (search_type & SRCH_FORW)
|
|
{
|
|
pos = forw_raw_line(pos, (char **)NULL);
|
|
while (pos == NULL_POSITION)
|
|
{
|
|
if (++linenum >= sc_height)
|
|
break;
|
|
pos = position(linenum);
|
|
}
|
|
} else
|
|
{
|
|
while (pos == NULL_POSITION)
|
|
{
|
|
if (--linenum < 0)
|
|
break;
|
|
pos = position(linenum);
|
|
}
|
|
}
|
|
}
|
|
return (pos);
|
|
}
|
|
|
|
/*
|
|
* Search a subset of the file, specified by start/end position.
|
|
*/
|
|
static int
|
|
search_range(pos, endpos, search_type, matches, maxlines, plinepos, pendpos)
|
|
POSITION pos;
|
|
POSITION endpos;
|
|
int search_type;
|
|
int matches;
|
|
int maxlines;
|
|
POSITION *plinepos;
|
|
POSITION *pendpos;
|
|
{
|
|
char *line;
|
|
LINENUM linenum;
|
|
char *sp = NULL, *ep = NULL; /* XXX: GCC */
|
|
int line_match;
|
|
int cvt_ops;
|
|
POSITION linepos, oldpos;
|
|
|
|
linenum = find_linenum(pos);
|
|
oldpos = pos;
|
|
for (;;)
|
|
{
|
|
/*
|
|
* Get lines until we find a matching one or until
|
|
* we hit end-of-file (or beginning-of-file if we're
|
|
* going backwards), or until we hit the end position.
|
|
*/
|
|
if (ABORT_SIGS())
|
|
{
|
|
/*
|
|
* A signal aborts the search.
|
|
*/
|
|
return (-1);
|
|
}
|
|
|
|
if ((endpos != NULL_POSITION && pos >= endpos) || maxlines == 0)
|
|
{
|
|
/*
|
|
* Reached end position without a match.
|
|
*/
|
|
if (pendpos != NULL)
|
|
*pendpos = pos;
|
|
return (matches);
|
|
}
|
|
if (maxlines > 0)
|
|
maxlines--;
|
|
|
|
if (search_type & SRCH_FORW)
|
|
{
|
|
/*
|
|
* Read the next line, and save the
|
|
* starting position of that line in linepos.
|
|
*/
|
|
linepos = pos;
|
|
pos = forw_raw_line(pos, &line);
|
|
if (linenum != 0)
|
|
linenum++;
|
|
} else
|
|
{
|
|
/*
|
|
* Read the previous line and save the
|
|
* starting position of that line in linepos.
|
|
*/
|
|
pos = back_raw_line(pos, &line);
|
|
linepos = pos;
|
|
if (linenum != 0)
|
|
linenum--;
|
|
}
|
|
|
|
if (pos == NULL_POSITION)
|
|
{
|
|
/*
|
|
* Reached EOF/BOF without a match.
|
|
*/
|
|
if (pendpos != NULL)
|
|
*pendpos = oldpos;
|
|
return (matches);
|
|
}
|
|
|
|
/*
|
|
* If we're using line numbers, we might as well
|
|
* remember the information we have now (the position
|
|
* and line number of the current line).
|
|
* Don't do it for every line because it slows down
|
|
* the search. Remember the line number only if
|
|
* we're "far" from the last place we remembered it.
|
|
*/
|
|
if (linenums && abs((int)(pos - oldpos)) > 1024)
|
|
add_lnum(linenum, pos);
|
|
oldpos = pos;
|
|
|
|
/*
|
|
* If it's a caseless search, convert the line to lowercase.
|
|
* If we're doing backspace processing, delete backspaces.
|
|
*/
|
|
cvt_ops = get_cvt_ops();
|
|
cvt_text(line, line, cvt_ops);
|
|
|
|
/*
|
|
* Test the next line to see if we have a match.
|
|
* We are successful if we either want a match and got one,
|
|
* or if we want a non-match and got one.
|
|
*/
|
|
line_match = match_pattern(line, &sp, &ep, 0);
|
|
line_match = (!(search_type & SRCH_NO_MATCH) && line_match) ||
|
|
((search_type & SRCH_NO_MATCH) && !line_match);
|
|
if (!line_match)
|
|
continue;
|
|
/*
|
|
* Got a match.
|
|
*/
|
|
if (search_type & SRCH_FIND_ALL)
|
|
{
|
|
#if HILITE_SEARCH
|
|
/*
|
|
* We are supposed to find all matches in the range.
|
|
* Just add the matches in this line to the
|
|
* hilite list and keep searching.
|
|
*/
|
|
if (line_match)
|
|
hilite_line(linepos, line, sp, ep, cvt_ops);
|
|
#endif
|
|
} else if (--matches <= 0)
|
|
{
|
|
/*
|
|
* Found the one match we're looking for.
|
|
* Return it.
|
|
*/
|
|
#if HILITE_SEARCH
|
|
if (hilite_search == OPT_ON)
|
|
{
|
|
/*
|
|
* Clear the hilite list and add only
|
|
* the matches in this one line.
|
|
*/
|
|
clr_hilite();
|
|
if (line_match)
|
|
hilite_line(linepos, line, sp, ep, cvt_ops);
|
|
}
|
|
#endif
|
|
if (plinepos != NULL)
|
|
*plinepos = linepos;
|
|
return (0);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Search for the n-th occurrence of a specified pattern,
|
|
* either forward or backward.
|
|
* Return the number of matches not yet found in this file
|
|
* (that is, n minus the number of matches found).
|
|
* Return -1 if the search should be aborted.
|
|
* Caller may continue the search in another file
|
|
* if less than n matches are found in this file.
|
|
*/
|
|
public int
|
|
search(search_type, pattern, n)
|
|
int search_type;
|
|
char *pattern;
|
|
int n;
|
|
{
|
|
POSITION pos;
|
|
int ucase;
|
|
|
|
if (pattern == NULL || *pattern == '\0')
|
|
{
|
|
/*
|
|
* A null pattern means use the previously compiled pattern.
|
|
*/
|
|
if (!prev_pattern())
|
|
{
|
|
error("No previous regular expression", NULL_PARG);
|
|
return (-1);
|
|
}
|
|
if ((search_type & SRCH_NO_REGEX) !=
|
|
(last_search_type & SRCH_NO_REGEX))
|
|
{
|
|
error("Please re-enter search pattern", NULL_PARG);
|
|
return -1;
|
|
}
|
|
#if HILITE_SEARCH
|
|
if (hilite_search == OPT_ON)
|
|
{
|
|
/*
|
|
* Erase the highlights currently on screen.
|
|
* If the search fails, we'll redisplay them later.
|
|
*/
|
|
repaint_hilite(0);
|
|
}
|
|
if (hilite_search == OPT_ONPLUS && hide_hilite)
|
|
{
|
|
/*
|
|
* Highlight any matches currently on screen,
|
|
* before we actually start the search.
|
|
*/
|
|
hide_hilite = 0;
|
|
hilite_screen();
|
|
}
|
|
hide_hilite = 0;
|
|
#endif
|
|
} else
|
|
{
|
|
/*
|
|
* Compile the pattern.
|
|
*/
|
|
ucase = is_ucase(pattern);
|
|
if (caseless == OPT_ONPLUS)
|
|
cvt_text(pattern, pattern, CVT_TO_LC);
|
|
if (compile_pattern(pattern, search_type) < 0)
|
|
return (-1);
|
|
/*
|
|
* Ignore case if -I is set OR
|
|
* -i is set AND the pattern is all lowercase.
|
|
*/
|
|
is_ucase_pattern = ucase;
|
|
if (is_ucase_pattern && caseless != OPT_ONPLUS)
|
|
is_caseless = 0;
|
|
else
|
|
is_caseless = caseless;
|
|
#if HILITE_SEARCH
|
|
if (hilite_search)
|
|
{
|
|
/*
|
|
* Erase the highlights currently on screen.
|
|
* Also permanently delete them from the hilite list.
|
|
*/
|
|
repaint_hilite(0);
|
|
hide_hilite = 0;
|
|
clr_hilite();
|
|
}
|
|
if (hilite_search == OPT_ONPLUS)
|
|
{
|
|
/*
|
|
* Highlight any matches currently on screen,
|
|
* before we actually start the search.
|
|
*/
|
|
hilite_screen();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Figure out where to start the search.
|
|
*/
|
|
pos = search_pos(search_type);
|
|
if (pos == NULL_POSITION)
|
|
{
|
|
/*
|
|
* Can't find anyplace to start searching from.
|
|
*/
|
|
if (search_type & SRCH_PAST_EOF)
|
|
return (n);
|
|
/* repaint(); -- why was this here? */
|
|
error("Nothing to search", NULL_PARG);
|
|
return (-1);
|
|
}
|
|
|
|
n = search_range(pos, NULL_POSITION, search_type, n, -1,
|
|
&pos, (POSITION*)NULL);
|
|
if (n != 0)
|
|
{
|
|
/*
|
|
* Search was unsuccessful.
|
|
*/
|
|
#if HILITE_SEARCH
|
|
if (hilite_search == OPT_ON && n > 0)
|
|
/*
|
|
* Redisplay old hilites.
|
|
*/
|
|
repaint_hilite(1);
|
|
#endif
|
|
return (n);
|
|
}
|
|
|
|
if (!(search_type & SRCH_NO_MOVE))
|
|
{
|
|
/*
|
|
* Go to the matching line.
|
|
*/
|
|
jump_loc(pos, jump_sline);
|
|
}
|
|
|
|
#if HILITE_SEARCH
|
|
if (hilite_search == OPT_ON)
|
|
/*
|
|
* Display new hilites in the matching line.
|
|
*/
|
|
repaint_hilite(1);
|
|
#endif
|
|
return (0);
|
|
}
|
|
|
|
|
|
#if HILITE_SEARCH
|
|
/*
|
|
* Prepare hilites in a given range of the file.
|
|
*
|
|
* The pair (prep_startpos,prep_endpos) delimits a contiguous region
|
|
* of the file that has been "prepared"; that is, scanned for matches for
|
|
* the current search pattern, and hilites have been created for such matches.
|
|
* If prep_startpos == NULL_POSITION, the prep region is empty.
|
|
* If prep_endpos == NULL_POSITION, the prep region extends to EOF.
|
|
* prep_hilite asks that the range (spos,epos) be covered by the prep region.
|
|
*/
|
|
public void
|
|
prep_hilite(spos, epos, maxlines)
|
|
POSITION spos;
|
|
POSITION epos;
|
|
int maxlines;
|
|
{
|
|
POSITION nprep_startpos = prep_startpos;
|
|
POSITION nprep_endpos = prep_endpos;
|
|
POSITION new_epos;
|
|
POSITION max_epos;
|
|
int result;
|
|
int i;
|
|
/*
|
|
* Search beyond where we're asked to search, so the prep region covers
|
|
* more than we need. Do one big search instead of a bunch of small ones.
|
|
*/
|
|
#define SEARCH_MORE (3*size_linebuf)
|
|
|
|
if (!prev_pattern())
|
|
return;
|
|
|
|
/*
|
|
* If we're limited to a max number of lines, figure out the
|
|
* file position we should stop at.
|
|
*/
|
|
if (maxlines < 0)
|
|
max_epos = NULL_POSITION;
|
|
else
|
|
{
|
|
max_epos = spos;
|
|
for (i = 0; i < maxlines; i++)
|
|
max_epos = forw_raw_line(max_epos, (char **)NULL);
|
|
}
|
|
|
|
/*
|
|
* Find two ranges:
|
|
* The range that we need to search (spos,epos); and the range that
|
|
* the "prep" region will then cover (nprep_startpos,nprep_endpos).
|
|
*/
|
|
|
|
if (prep_startpos == NULL_POSITION ||
|
|
(epos != NULL_POSITION && epos < prep_startpos) ||
|
|
spos > prep_endpos)
|
|
{
|
|
/*
|
|
* New range is not contiguous with old prep region.
|
|
* Discard the old prep region and start a new one.
|
|
*/
|
|
clr_hilite();
|
|
if (epos != NULL_POSITION)
|
|
epos += SEARCH_MORE;
|
|
nprep_startpos = spos;
|
|
} else
|
|
{
|
|
/*
|
|
* New range partially or completely overlaps old prep region.
|
|
*/
|
|
if (epos == NULL_POSITION)
|
|
{
|
|
/*
|
|
* New range goes to end of file.
|
|
*/
|
|
;
|
|
} else if (epos > prep_endpos)
|
|
{
|
|
/*
|
|
* New range ends after old prep region.
|
|
* Extend prep region to end at end of new range.
|
|
*/
|
|
epos += SEARCH_MORE;
|
|
} else /* (epos <= prep_endpos) */
|
|
{
|
|
/*
|
|
* New range ends within old prep region.
|
|
* Truncate search to end at start of old prep region.
|
|
*/
|
|
epos = prep_startpos;
|
|
}
|
|
|
|
if (spos < prep_startpos)
|
|
{
|
|
/*
|
|
* New range starts before old prep region.
|
|
* Extend old prep region backwards to start at
|
|
* start of new range.
|
|
*/
|
|
if (spos < SEARCH_MORE)
|
|
spos = 0;
|
|
else
|
|
spos -= SEARCH_MORE;
|
|
nprep_startpos = spos;
|
|
} else /* (spos >= prep_startpos) */
|
|
{
|
|
/*
|
|
* New range starts within or after old prep region.
|
|
* Trim search to start at end of old prep region.
|
|
*/
|
|
spos = prep_endpos;
|
|
}
|
|
}
|
|
|
|
if (epos != NULL_POSITION && max_epos != NULL_POSITION &&
|
|
epos > max_epos)
|
|
/*
|
|
* Don't go past the max position we're allowed.
|
|
*/
|
|
epos = max_epos;
|
|
|
|
if (epos == NULL_POSITION || epos > spos)
|
|
{
|
|
result = search_range(spos, epos, SRCH_FORW|SRCH_FIND_ALL, 0,
|
|
maxlines, (POSITION*)NULL, &new_epos);
|
|
if (result < 0)
|
|
return;
|
|
if (prep_endpos == NULL_POSITION || new_epos > prep_endpos)
|
|
nprep_endpos = new_epos;
|
|
}
|
|
prep_startpos = nprep_startpos;
|
|
prep_endpos = nprep_endpos;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Simple pattern matching function.
|
|
* It supports no metacharacters like *, etc.
|
|
*/
|
|
static int
|
|
match(pattern, buf, pfound, pend)
|
|
char *pattern, *buf;
|
|
char **pfound, **pend;
|
|
{
|
|
register char *pp, *lp;
|
|
|
|
for ( ; *buf != '\0'; buf++)
|
|
{
|
|
for (pp = pattern, lp = buf; *pp == *lp; pp++, lp++)
|
|
if (*pp == '\0' || *lp == '\0')
|
|
break;
|
|
if (*pp == '\0')
|
|
{
|
|
if (pfound != NULL)
|
|
*pfound = buf;
|
|
if (pend != NULL)
|
|
*pend = lp;
|
|
return (1);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
#if HAVE_V8_REGCOMP
|
|
/*
|
|
* This function is called by the V8 regcomp to report
|
|
* errors in regular expressions.
|
|
*/
|
|
void
|
|
regerror(s)
|
|
char *s;
|
|
{
|
|
PARG parg;
|
|
|
|
parg.p_string = s;
|
|
error("%s", &parg);
|
|
}
|
|
#endif
|
|
|