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Invert optimization: allocate in a go

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Arun Prakash Jana 2021-07-15 18:55:03 +05:30
parent 064f5ea998
commit 0159c08602
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GPG key ID: A75979F35C080412
1 changed files with 12 additions and 3 deletions
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15
src/nnn.c
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@ -1562,7 +1562,8 @@ static inline void findmarkentry(char *path, struct entry *dentp)
static void invertselbuf(char *path) static void invertselbuf(char *path)
{ {
size_t len, endpos, offset = 0; size_t len, endpos, shrinklen = 0, alloclen = 0;
size_t const pathlen = xstrlen(path);
char *found; char *found;
int nmarked = 0, prev = 0; int nmarked = 0, prev = 0;
struct entry *dentp; struct entry *dentp;
@ -1580,6 +1581,7 @@ static void invertselbuf(char *path)
} else { } else {
++nselected; ++nselected;
dentp->flags |= FILE_SELECTED; dentp->flags |= FILE_SELECTED;
alloclen += pathlen + dentp->nlen;
} }
} else { } else {
dentp->flags |= FILE_SCANNED; dentp->flags |= FILE_SCANNED;
@ -1603,10 +1605,11 @@ static void invertselbuf(char *path)
} }
--nselected; --nselected;
offset += len; /* buffer size adjustment */ shrinklen += len; /* buffer size adjustment */
} else { } else {
++nselected; ++nselected;
dentp->flags |= FILE_SELECTED; dentp->flags |= FILE_SELECTED;
alloclen += pathlen + dentp->nlen;
} }
scan = FALSE; scan = FALSE;
} }
@ -1658,7 +1661,13 @@ static void invertselbuf(char *path)
} }
/* Buffer size adjustment */ /* Buffer size adjustment */
selbufpos -= offset; selbufpos -= shrinklen;
if (alloclen > shrinklen) {
pselbuf = xrealloc(pselbuf, selbuflen + (alloclen - shrinklen));
if (!pselbuf)
errexit();
}
free(marked); free(marked);