122 lines
2.2 KiB
C
122 lines
2.2 KiB
C
/* $Header: /nw/tony/src/stevie/src/RCS/mark.c,v 1.3 89/03/11 22:42:39 tony Exp $
|
|
*
|
|
* Routines to save and retrieve marks.
|
|
*/
|
|
|
|
#include "stevie.h"
|
|
|
|
#define NMARKS 10 /* max. # of marks that can be saved */
|
|
|
|
struct mark {
|
|
char name;
|
|
LNPTR pos;
|
|
};
|
|
|
|
static struct mark mlist[NMARKS];
|
|
static struct mark pcmark; /* previous context mark */
|
|
static bool_t pcvalid = FALSE; /* true if pcmark is valid */
|
|
|
|
/*
|
|
* setmark(c) - set mark 'c' at current cursor position
|
|
*
|
|
* Returns TRUE on success, FALSE if no room for mark or bad name given.
|
|
*/
|
|
bool_t
|
|
setmark(c)
|
|
register char c;
|
|
{
|
|
register int i;
|
|
|
|
if (!isalpha(c))
|
|
return FALSE;
|
|
|
|
/*
|
|
* If there is already a mark of this name, then just use the
|
|
* existing mark entry.
|
|
*/
|
|
for (i=0; i < NMARKS ;i++) {
|
|
if (mlist[i].name == c) {
|
|
mlist[i].pos = *Curschar;
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* There wasn't a mark of the given name, so find a free slot
|
|
*/
|
|
for (i=0; i < NMARKS ;i++) {
|
|
if (mlist[i].name == NUL) { /* got a free one */
|
|
mlist[i].name = c;
|
|
mlist[i].pos = *Curschar;
|
|
return TRUE;
|
|
}
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
/*
|
|
* setpcmark() - set the previous context mark to the current position
|
|
*/
|
|
void
|
|
setpcmark()
|
|
{
|
|
pcmark.pos = *Curschar;
|
|
pcvalid = TRUE;
|
|
}
|
|
|
|
/*
|
|
* getmark(c) - find mark for char 'c'
|
|
*
|
|
* Return pointer to LNPTR or NULL if no such mark.
|
|
*/
|
|
LNPTR *
|
|
getmark(c)
|
|
register char c;
|
|
{
|
|
register int i;
|
|
|
|
if (c == '\'' || c == '`') /* previous context mark */
|
|
return pcvalid ? &(pcmark.pos) : (LNPTR *) NULL;
|
|
|
|
for (i=0; i < NMARKS ;i++) {
|
|
if (mlist[i].name == c)
|
|
return &(mlist[i].pos);
|
|
}
|
|
return (LNPTR *) NULL;
|
|
}
|
|
|
|
/*
|
|
* clrall() - clear all marks
|
|
*
|
|
* Used mainly when trashing the entire buffer during ":e" type commands
|
|
*/
|
|
void
|
|
clrall()
|
|
{
|
|
register int i;
|
|
|
|
for (i=0; i < NMARKS ;i++)
|
|
mlist[i].name = NUL;
|
|
pcvalid = FALSE;
|
|
}
|
|
|
|
/*
|
|
* clrmark(line) - clear any marks for 'line'
|
|
*
|
|
* Used any time a line is deleted so we don't have marks pointing to
|
|
* non-existent lines.
|
|
*/
|
|
void
|
|
clrmark(line)
|
|
register LINE *line;
|
|
{
|
|
register int i;
|
|
|
|
for (i=0; i < NMARKS ;i++) {
|
|
if (mlist[i].pos.linep == line)
|
|
mlist[i].name = NUL;
|
|
}
|
|
if (pcvalid && (pcmark.pos.linep == line))
|
|
pcvalid = FALSE;
|
|
}
|