109 lines
2.2 KiB
C
109 lines
2.2 KiB
C
/* misc.c */
|
|
|
|
/* Author:
|
|
* Steve Kirkendall
|
|
* 14407 SW Teal Blvd. #C
|
|
* Beaverton, OR 97005
|
|
* kirkenda@cs.pdx.edu
|
|
*/
|
|
|
|
|
|
/* This file contains functions which didn't seem happy anywhere else */
|
|
|
|
#ifndef lint
|
|
static char rcsid[] = "$Id: misc.c,v 1.3 1993/11/08 05:06:17 alm Exp $";
|
|
#endif /* not lint */
|
|
|
|
|
|
#include "config.h"
|
|
#include "vi.h"
|
|
|
|
|
|
/* find a particular line & return a pointer to a copy of its text */
|
|
char *fetchline(line)
|
|
long line; /* line number of the line to fetch */
|
|
{
|
|
int i;
|
|
REG char *scan; /* used to search for the line in a BLK */
|
|
long l; /* line number counter */
|
|
static BLK buf; /* holds ONLY the selected line (as string) */
|
|
REG char *cpy; /* used while copying the line */
|
|
static long nextline; /* } These four variables are used */
|
|
static long chglevel; /* } to implement a shortcut when */
|
|
static char *nextscan; /* } consecutive lines are fetched */
|
|
static long nextlnum; /* } */
|
|
|
|
/* can we do a shortcut? */
|
|
if (changes == chglevel && line == nextline)
|
|
{
|
|
scan = nextscan;
|
|
}
|
|
else
|
|
{
|
|
/* scan lnum[] to determine which block its in */
|
|
for (i = 1; line > lnum[i]; i++)
|
|
{
|
|
}
|
|
nextlnum = lnum[i];
|
|
|
|
/* fetch text of the block containing that line */
|
|
scan = blkget(i)->c;
|
|
|
|
/* find the line in the block */
|
|
for (l = lnum[i - 1]; ++l < line; )
|
|
{
|
|
while (*scan++ != '\n')
|
|
{
|
|
}
|
|
}
|
|
}
|
|
|
|
/* copy it into a block by itself, with no newline */
|
|
for (cpy = buf.c; *scan != '\n'; )
|
|
{
|
|
*cpy++ = *scan++;
|
|
}
|
|
*cpy = '\0';
|
|
|
|
/* maybe speed up the next call to fetchline() ? */
|
|
if (line < nextlnum)
|
|
{
|
|
nextline = line + 1;
|
|
chglevel = changes;
|
|
nextscan = scan + 1;
|
|
}
|
|
else
|
|
{
|
|
nextline = 0;
|
|
}
|
|
|
|
/* Calls to fetchline() interfere with calls to pfetch(). Make sure
|
|
* that pfetch() resets itself on its next invocation.
|
|
*/
|
|
pchgs = 0L;
|
|
|
|
/* Return a pointer to the line's text */
|
|
return buf.c;
|
|
}
|
|
|
|
|
|
/* error message from the regexp code */
|
|
void regerr(txt)
|
|
char *txt; /* an error message */
|
|
{
|
|
msg("RE error: %s", txt);
|
|
}
|
|
|
|
/* This function is equivelent to the pfetch() macro */
|
|
void pfetch(l)
|
|
long l; /* line number of line to fetch */
|
|
{
|
|
if(l != pline || changes != pchgs)
|
|
{
|
|
pline = (l);
|
|
ptext = fetchline(pline);
|
|
plen = strlen(ptext);
|
|
pchgs = changes;
|
|
}
|
|
}
|