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Clean up and expand the binary decoding macros.

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This commit is contained in:
Phillip Toland 2008-12-10 12:30:52 -06:00
parent c5e50712e1
commit d2f15bef80
1 changed files with 9 additions and 7 deletions
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16
c_src/bdberl_drv.c
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@ -79,7 +79,9 @@ static hive_hash* G_DATABASES_NAMES;
#define WRITE_LOCK(L) erl_drv_rwlock_rwlock(L)
#define WRITE_UNLOCK(L) erl_drv_rwlock_rwunlock(L)
#define DECODE_UINT(B) (unsigned int)(B[0] + (B[1] << 8) + (B[2] << 16) + (B[3] << 24))
#define DECODE_BYTE(_buf, _off) (_buf[_off])
#define DECODE_INT(_buf, _off) (*((int*)_buf+_off))
#define DECODE_STRING(_buf, _off) (char*)(_buf+_off)
#define RETURN_BH(bh, outbuf) *outbuf = (char*)bh.bin; return bh.bin->orig_size;
@ -209,9 +211,9 @@ static int bdberl_drv_control(ErlDrvData handle, unsigned int cmd,
{
// Extract the type code and filename from the inbuf
// Inbuf is: <<Flags:32, Type:8, Name/bytes, 0:8>>
unsigned int flags = DECODE_UINT(inbuf);
DBTYPE type = (DBTYPE)inbuf[4];
char* name = (char*)(inbuf+5);
unsigned flags = (unsigned) DECODE_INT(inbuf, 0);
DBTYPE type = (DBTYPE) DECODE_BYTE(inbuf, 4);
char* name = DECODE_STRING(inbuf, 5);
int dbref;
int status;
int rc = open_database(name, type, flags, d, &dbref);
@ -238,9 +240,9 @@ static int bdberl_drv_control(ErlDrvData handle, unsigned int cmd,
// TODO: If data is inflight, fail. Abort any open txns.
// Take the provided dbref and attempt to close it
int dbref = *((int*)inbuf);
int dbref = DECODE_INT(inbuf, 0);
int rc = close_database(dbref, d);
// Outbuf is: <<Rc:32>>
RETURN_INT(rc, outbuf);
}
@ -301,7 +303,7 @@ static int bdberl_drv_control(ErlDrvData handle, unsigned int cmd,
}
// Inbuf is: << DbRef:32, Rest/binary>>
int dbref = *((int*)inbuf);
int dbref = DECODE_INT(inbuf, 0);
// Make sure this port currently has dbref open -- if it doesn't, error out. Of note,
// if it's in our list, we don't need to grab the RWLOCK, as we don't have to worry about