static int vstring_extend(ACL_VBUF *bp, ssize_t incr)
{
const char *myname = "vstring_extend";
ssize_t used = (ssize_t) (bp->ptr - bp->data), new_len;
ACL_VSTRING *vp = (ACL_VSTRING *) bp;
if (vp->maxlen > 0 && (ssize_t) ACL_VSTRING_LEN(vp) >= vp->maxlen) {
ACL_VSTRING_AT_OFFSET(vp, vp->maxlen - 1);
ACL_VSTRING_TERMINATE(vp);
acl_msg_warn("%s(%d), %s: overflow maxlen: %ld, %ld",
__FILE__, __LINE__, myname, (long) vp->maxlen,
(long) ACL_VSTRING_LEN(vp));
bp->flags |= ACL_VBUF_FLAG_EOF;
return ACL_VBUF_EOF;
}
#ifdef ACL_WINDOWS
if (bp->fd == ACL_FILE_INVALID && (bp->flags & ACL_VBUF_FLAG_FIXED))
#else
if (bp->fd < 0 && (bp->flags & ACL_VBUF_FLAG_FIXED))
#endif
{
acl_msg_warn("%s(%d), %s: can't extend fixed buffer",
__FILE__, __LINE__, myname);
return ACL_VBUF_EOF;
}
/*
* Note: vp->vbuf.len is the current buffer size (both on entry and on
* exit of this routine). We round up the increment size to the buffer
* size to avoid silly little buffer increments. With really large
* strings we might want to abandon the length doubling strategy, and
* go to fixed increments.
*/
#ifdef INCR_NO_DOUBLE
/* below come from redis-server/sds.c/sdsMakeRoomFor, which can
* avoid memory double growing too large --- 2015.2.2, zsx
*/
new_len = bp->len + incr;
if (new_len < MAX_PREALLOC)
new_len *= 2;
else
new_len += MAX_PREALLOC;
#else
new_len = bp->len + (bp->len > incr ? bp->len : incr);
#endif
if (vp->maxlen > 0 && new_len > vp->maxlen)
new_len = vp->maxlen;
if (vp->slice)
bp->data = (unsigned char *) acl_slice_pool_realloc(
__FILE__, __LINE__, vp->slice, bp->data, new_len);
else if (vp->dbuf) {
const unsigned char *data = bp->data;
bp->data = (unsigned char *) acl_dbuf_pool_alloc(
vp->dbuf, new_len);
memcpy(bp->data, data, used);
acl_dbuf_pool_free(vp->dbuf, data);
} else if (bp->fd != ACL_FILE_INVALID) {
#ifdef ACL_UNIX
acl_off_t off = new_len - 1;
if (acl_lseek(bp->fd, off, SEEK_SET) != (acl_off_t) off)
acl_msg_fatal("lseek failed: %s, off: %lld",
acl_last_serror(), off);
if (acl_file_write(bp->fd, "\0", 1, 0, NULL, NULL)
== ACL_VSTREAM_EOF)
{
acl_msg_fatal("write error: %s", acl_last_serror());
}
#endif
} else
bp->data = (unsigned char *) acl_myrealloc(bp->data, new_len);
bp->len = new_len;
bp->ptr = bp->data + used;
bp->cnt = bp->len - used;
return 0;
}
bool dbuf_pool::dbuf_free(const void* addr)
{
return acl_dbuf_pool_free(pool_, addr) == 0 ? true : false;
}
