82 lines
2.7 KiB
C
82 lines
2.7 KiB
C
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/*
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This file is part of MOST.
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Copyright (c) 1991, 1999, 2002, 2005-2018, 2019 John E. Davis
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, 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, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc., 675
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Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef _DAVIS_BUFFER_H_
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# define _DAVIS_BUFFER_H_
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typedef struct
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{
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char file[MAX_PATHLEN]; /* filename */
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unsigned char *beg; /* beginning of buffer */
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unsigned char *end; /* end of buffer */
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int mark; /* marked line in buffer */
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unsigned int flags;
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int fd; /* file descriptor--- -1 if closed */
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FILE *fp; /* use pclose when EOF is reached */
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int size;
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# ifdef VMS
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int rec; /* record size for reads */
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# endif
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# if MOST_HAS_MMAP
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int is_mmaped;
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unsigned int mmap_size;
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# endif
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}
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Most_Buffer_Type;
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extern Most_Buffer_Type *Most_Buf;
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extern unsigned char *Most_Beg, *Most_Eob;
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extern MOST_INT Most_Num_Lines;
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/* Offset of current position from beginning of buffer */
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extern MOST_UINT Most_C_Offset;
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extern MOST_INT Most_C_Line;
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/*
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* Current line number. If at the beginning of the buffer, it is 1. If
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* we are at the last point of the buffer it is the number of lines.
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*/
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/* This routine does not move the point */
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extern unsigned char *most_beg_of_line(void);
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extern MOST_INT most_forward_line(MOST_INT);
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/* This routine moves the point forward n lines. n can be negative.
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It returns the number moved. */
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extern void most_goto_line (MOST_INT);
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/* Move the point somewhere on the nth line of the buffer returning
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C_POS */
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extern MOST_INT most_what_line (unsigned char *);
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/* return the line number of position 'argument'. Does not move point */
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/* count the number of lines in the region delimited by beg and end.
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Counts lines from beg up to end but does not count end.
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Does not move point. */
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extern MOST_INT most_count_lines(unsigned char *, unsigned char *);
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extern int most_extract_line(unsigned char **, unsigned char **);
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extern Most_Buffer_Type *most_switch_to_buffer(Most_Buffer_Type *);
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extern Most_Buffer_Type *most_create_buffer(char *);
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extern void most_find_row_column(unsigned char *, MOST_INT *, MOST_INT *);
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#endif
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