[src/trunk]: src/lib/libc/db/mpool knf, reduce pointer gymnastics

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/ab00d6af26b7
branches:  trunk
changeset: 791977:ab00d6af26b7
user:      christos <christos%NetBSD.org@localhost>
date:      Sat Dec 14 18:04:00 2013 +0000

description:
knf, reduce pointer gymnastics

diffstat:

 lib/libc/db/mpool/mpool.c |  55 +++++++++++++++++++++++-----------------------
 1 files changed, 28 insertions(+), 27 deletions(-)

diffs (205 lines):

diff -r 0cbbf7d1e26a -r ab00d6af26b7 lib/libc/db/mpool/mpool.c
--- a/lib/libc/db/mpool/mpool.c Sat Dec 14 17:35:11 2013 +0000
+++ b/lib/libc/db/mpool/mpool.c Sat Dec 14 18:04:00 2013 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: mpool.c,v 1.20 2013/11/22 16:25:51 christos Exp $      */
+/*     $NetBSD: mpool.c,v 1.21 2013/12/14 18:04:00 christos Exp $      */
 
 /*-
  * Copyright (c) 1990, 1993, 1994
@@ -34,7 +34,7 @@
 #endif
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: mpool.c,v 1.20 2013/11/22 16:25:51 christos Exp $");
+__RCSID("$NetBSD: mpool.c,v 1.21 2013/12/14 18:04:00 christos Exp $");
 
 #include "namespace.h"
 #include <sys/queue.h>
@@ -84,14 +84,14 @@
         * We don't currently handle pipes, although we should.
         */
        if (fstat(fd, &sb))
-               return (NULL);
+               return NULL;
        if (!S_ISREG(sb.st_mode)) {
                errno = ESPIPE;
-               return (NULL);
+               return NULL;
        }
 
        /* Allocate and initialize the MPOOL cookie. */
-       if ((mp = (MPOOL *)calloc(1, sizeof(MPOOL))) == NULL)
+       if ((mp = calloc(1, sizeof(*mp))) == NULL)
                return (NULL);
        TAILQ_INIT(&mp->lqh);
        for (entry = 0; entry < HASHSIZE; ++entry)
@@ -100,7 +100,7 @@
        mp->npages = (pgno_t)(sb.st_size / pagesize);
        mp->pagesize = pagesize;
        mp->fd = fd;
-       return (mp);
+       return mp;
 }
 
 /*
@@ -139,14 +139,14 @@
         * and return.
         */
        if ((bp = mpool_bkt(mp)) == NULL)
-               return (NULL);
+               return NULL;
        *pgnoaddr = bp->pgno = mp->npages++;
        bp->flags = MPOOL_PINNED;
 
        head = &mp->hqh[HASHKEY(bp->pgno)];
        TAILQ_INSERT_HEAD(head, bp, hq);
        TAILQ_INSERT_TAIL(&mp->lqh, bp, q);
-       return (bp->page);
+       return bp->page;
 }
 
 /*
@@ -165,7 +165,7 @@
        /* Check for attempt to retrieve a non-existent page. */
        if (pgno >= mp->npages) {
                errno = EINVAL;
-               return (NULL);
+               return NULL;
        }
 
 #ifdef STATISTICS
@@ -193,12 +193,12 @@
 
                /* Return a pinned page. */
                bp->flags |= MPOOL_PINNED;
-               return (bp->page);
+               return bp->page;
        }
 
        /* Get a page from the cache. */
        if ((bp = mpool_bkt(mp)) == NULL)
-               return (NULL);
+               return NULL;
 
        /* Read in the contents. */
 #ifdef STATISTICS
@@ -208,7 +208,7 @@
        if ((nr = pread(mp->fd, bp->page, (size_t)mp->pagesize, off)) != (int)mp->pagesize) {
                if (nr >= 0)
                        errno = EFTYPE;
-               return (NULL);
+               return NULL;
        }
 
        /* Set the page number, pin the page. */
@@ -227,7 +227,7 @@
        if (mp->pgin != NULL)
                (mp->pgin)(mp->pgcookie, bp->pgno, bp->page);
 
-       return (bp->page);
+       return bp->page;
 }
 
 /*
@@ -243,7 +243,7 @@
 #ifdef STATISTICS
        ++mp->pageput;
 #endif
-       bp = (BKT *)(void *)((char *)page - sizeof(BKT));
+       bp = (void *)((intptr_t)page - sizeof(BKT));
 #ifdef DEBUG
        if (!(bp->flags & MPOOL_PINNED)) {
                (void)fprintf(stderr,
@@ -274,7 +274,7 @@
 
        /* Free the MPOOL cookie. */
        free(mp);
-       return (RET_SUCCESS);
+       return RET_SUCCESS;
 }
 
 /*
@@ -290,10 +290,10 @@
        TAILQ_FOREACH(bp, &mp->lqh, q)
                if (bp->flags & MPOOL_DIRTY &&
                    mpool_write(mp, bp) == RET_ERROR)
-                       return (RET_ERROR);
+                       return RET_ERROR;
 
        /* Sync the file descriptor. */
-       return (fsync(mp->fd) ? RET_ERROR : RET_SUCCESS);
+       return fsync(mp->fd) ? RET_ERROR : RET_SUCCESS;
 }
 
 /*
@@ -321,7 +321,7 @@
                        /* Flush if dirty. */
                        if (bp->flags & MPOOL_DIRTY &&
                            mpool_write(mp, bp) == RET_ERROR)
-                               return (NULL);
+                               return NULL;
 #ifdef STATISTICS
                        ++mp->pageflush;
 #endif
@@ -337,20 +337,20 @@
                                bp->page = spage;
                        }
 #endif
-                       return (bp);
+                       return bp;
                }
 
 new:   if ((bp = calloc(1, (size_t)(sizeof(BKT) + mp->pagesize))) == NULL)
-               return (NULL);
+               return NULL;
 #ifdef STATISTICS
        ++mp->pagealloc;
 #endif
 #if defined(DEBUG) || defined(PURIFY)
        (void)memset(bp, 0xff, (size_t)(sizeof(BKT) + mp->pagesize));
 #endif
-       bp->page = (char *)(void *)bp + sizeof(BKT);
+       bp->page = (void *)((intptr_t)bp + sizeof(BKT));
        ++mp->curcache;
-       return (bp);
+       return bp;
 }
 
 /*
@@ -371,8 +371,9 @@
                (mp->pgout)(mp->pgcookie, bp->pgno, bp->page);
 
        off = mp->pagesize * bp->pgno;
-       if (pwrite(mp->fd, bp->page, (size_t)mp->pagesize, off) != (int)mp->pagesize)
-               return (RET_ERROR);
+       if (pwrite(mp->fd, bp->page, (size_t)mp->pagesize, off) !=
+           (ssize_t)mp->pagesize)
+               return RET_ERROR;
 
        /*
         * Re-run through the input filter since this page may soon be
@@ -384,7 +385,7 @@
                (mp->pgin)(mp->pgcookie, bp->pgno, bp->page);
 
        bp->flags &= ~MPOOL_DIRTY;
-       return (RET_SUCCESS);
+       return RET_SUCCESS;
 }
 
 /*
@@ -403,12 +404,12 @@
 #ifdef STATISTICS
                        ++mp->cachehit;
 #endif
-                       return (bp);
+                       return bp;
                }
 #ifdef STATISTICS
        ++mp->cachemiss;
 #endif
-       return (NULL);
+       return NULL;
 }
 
 #ifdef STATISTICS