mirror of https://github.com/rfivet/uemacs.git
83 lines
3.4 KiB
C
83 lines
3.4 KiB
C
/* buffer.h -- buffer type and functions */
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#ifndef _BUFFER_H_
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#define _BUFFER_H_
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#include "line.h" /* line_p */
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#include "names.h" /* BINDABLE() */
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/* Text is kept in buffers. A buffer header, described below, exists for
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every buffer in the system. The buffers are kept in a big list, so that
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commands that search for a buffer by name can find the buffer header.
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There is a safe store for the dot and mark in the header, but this is
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only valid if the buffer is not being displayed (that is, if "b_nwnd" is
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0). The text for the buffer is kept in a circularly linked list of
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lines, with a pointer to 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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typedef char fname_t[ 256] ; /* file name type */
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typedef char bname_t[ 16] ; /* buffer name type */
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typedef struct buffer {
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struct buffer *b_bufp ; /* Link to next struct buffer */
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line_p b_dotp ; /* Link to "." struct line structure */
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line_p b_markp ; /* The same as the above two, */
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line_p 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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} *buffer_p ;
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extern buffer_p curbp ; /* Current buffer */
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extern buffer_p bheadp ; /* Head of list of buffers */
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extern buffer_p 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[ NUMMODES] ; /* text names of modes */
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extern int gmode ; /* global editor mode */
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/* Bindable functions */
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BINDABLE( killbuffer) ;
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BINDABLE( listbuffers) ;
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BINDABLE( namebuffer) ;
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BINDABLE( nextbuffer) ;
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BINDABLE( unmark) ;
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BINDABLE( usebuffer) ;
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boolean anycb( void) ; /* Any changed buffer? */
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int bclear( buffer_p bp) ; /* empty buffer */
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int swbuffer( buffer_p bp) ; /* switch to buffer, make it current */
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int zotbuf( buffer_p bp) ; /* remove buffer */
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/* Lookup a buffer by name. If not found and create_f is TRUE then create
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it with flags set.
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*/
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buffer_p bfind( const char *bname, boolean create_f, int flags) ;
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#endif
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/* end of buffer.h */
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