cast alloc's to shut SunOS up

first pass at making DB use basic integral types (the Alpha port)

Fixes a small memory leak (476 bytes) in libc's database subsystem.
From: Christopher Jon Kane <kane@kidd.vet.purdue.edu>

hash can actually read version 1 as well as version 2, the on-disk
format didn't change

ndbm will pass none of the (future) DB flags

add DB_ flags to __hash_open()
USE_OPEN_FLAGS work done in dbopen(), no longer needed here

add DB_ flags to __hash_open()

always pass the appropriate overflow page address
needed to handle the case where the last page in the chain is the last
page of an overflow pair; from Margo Seltzer

don't increment/change a void *, cast to char * (thanks GCC!)

4.4BSD snapshot (revision 8.1); add 1993 to copyright

When bumping splitpoint, begin overflow page number offset at 1 not 0

hash_realloc should zero out the newly allocated memory,
not beyond the end of the old memory.

The short at page[2] contains the flag value that identifies
long keys, long data or overflow pages, not page[1].

4.4BSD snapshot (revision 8.1); add 1993 to copyright

4.4BSD snapshot (revision 8.1); add 1993 to copyright

4.4BSD snapshot (revision 8.1)

4.4BSD snapshot (revision 8.1)

put SCCS keywords back in

Add fd interface routine to return file descriptor. Pass file name
to init_htab so that if no page size is specified, the page size will default
to the block size of the file system. Initialize f

Add fd interface routine to return file descriptor. Pass file name
to init_htab so that if no page size is specified, the page size will default
to the block size of the file system. Initialize fill factor so that it will
dynamically be set during operation.

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Dynamically compute fill factor (if not user specified). When
first overflow page is allocated, set fill factor to the number of entries
on overflowing page. Verify that new fill factor is at lea

Dynamically compute fill factor (if not user specified). When
first overflow page is allocated, set fill factor to the number of entries
on overflowing page. Verify that new fill factor is at least MIN_FFACTOR.

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Change default page size to 4K and fill factor to 40.

Use 4K page default. Use dynamically computed fill factor default
instead of fixed value.

add a flags argument to the sync call

fix prototype declaration for swap_header().

bcmp/bcopy/bzero -> memcmp/memmove/memset