mirror of https://github.com/rfivet/uemacs.git
75 lines
2.9 KiB
C
75 lines
2.9 KiB
C
#ifndef _BUFFER_H_
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#define _BUFFER_H_
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#include "line.h"
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typedef char fname_t[ 256] ; /* file name type */
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typedef char bname_t[ 16] ; /* buffer name type */
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/*
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* Text is kept in buffers. A buffer header, described below, exists for every
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* buffer in the system. The buffers are kept in a big list, so that commands
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* that search for a buffer by name can find the buffer header. There is a
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* safe store for the dot and mark in the header, but this is only valid if
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* the buffer is not being displayed (that is, if "b_nwnd" is 0). The text for
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* the buffer is kept in a circularly linked list of lines, with a pointer to
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* the header line in "b_linep".
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* Buffers may be "Inactive" which means the files associated with them
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* have not been read in yet. These get read in at "use buffer" time.
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*/
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struct buffer {
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struct buffer *b_bufp; /* Link to next struct buffer */
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struct line *b_dotp; /* Link to "." struct line structure */
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struct line *b_markp; /* The same as the above two, */
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struct line *b_linep; /* Link to the header struct line */
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int b_doto; /* Offset of "." in above struct line */
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int b_marko; /* but for the "mark" */
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int b_mode; /* editor mode of this buffer */
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char b_active; /* window activated flag */
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char b_nwnd; /* Count of windows on buffer */
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char b_flag; /* Flags */
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fname_t b_fname ; /* File name */
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bname_t b_bname ; /* Buffer name */
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};
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extern struct buffer *curbp ; /* Current buffer */
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extern struct buffer *bheadp ; /* Head of list of buffers */
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extern struct buffer *blistp ; /* Buffer for C-X C-B */
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#define BFINVS 0x01 /* Internal invisable buffer */
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#define BFCHG 0x02 /* Changed since last write */
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#define BFTRUNC 0x04 /* buffer was truncated when read */
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/* mode flags */
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#define NUMMODES 9 /* # of defined modes */
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#define MDWRAP 0x0001 /* word wrap */
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#define MDCMOD 0x0002 /* C indentation and fence match */
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#define MDEXACT 0x0004 /* Exact matching for searches */
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#define MDVIEW 0x0008 /* read-only buffer */
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#define MDOVER 0x0010 /* overwrite mode */
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#define MDMAGIC 0x0020 /* regular expresions in search */
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#define MDASAVE 0x0040 /* auto-save mode */
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#define MDUTF8 0x0080 /* utf8 mode */
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#define MDDOS 0x0100 /* CRLF eol mode */
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extern const char *modename[] ; /* text names of modes */
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extern int gmode ; /* global editor mode */
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int usebuffer( int f, int n) ;
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int nextbuffer( int f, int n) ;
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int swbuffer( struct buffer *bp) ;
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int killbuffer( int f, int n) ;
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int zotbuf( struct buffer *bp) ;
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int namebuffer( int f, int n) ;
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int listbuffers( int f, int n) ;
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int anycb( void) ;
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int bclear( struct buffer *bp) ;
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int unmark( int f, int n) ;
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/* Lookup a buffer by name. */
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struct buffer *bfind( const char *bname, int cflag, int bflag) ;
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#endif
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