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|
C
C This library is free software: you can redistribute it and/or
C modify it under the terms of the GNU Lesser General Public License
C version 3, modified in accordance with the provisions of the
C license to address the requirements of UK law.
C
C You should have received a copy of the modified GNU Lesser General
C Public License along with this library. If not, copies may be
C downloaded from http://www.ccp4.ac.uk/ccp4license.php
C
C This program is distributed in the hope that it will be useful,
C but WITHOUT ANY WARRANTY; without even the implied warranty of
C MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
C GNU Lesser General Public License for more details.
C
C**** VAXDISKIO.FOR ****************************************************
C
C This file contains a set of FORTRAN subroutines for
C doing either sequential or random access disk I/O
C with variable record lengths. The files are actually
C written as fixed-record direct-access files, but this
C is transparent to the user.
C
C Note: Only 10 files may be opened simultaneously!!!!
C --
C This is a VAX version, and will require changes for other machines.
C
C Within these routines, all counting is done as bytes (== minimal
C machine element). However, the entries QREAD, QWRITE, QSEEK, QBACK,
C QSKIP and QLOCATE count in items. The conversion between bytes and
C items may be changed by a call to QMODE, which defines the mode
C (corresponding to map/image modes), and stores and returns the number
C of bytes per item NCHITM. NCHITM defaults to 1 for all streams unless
C changed by a call to QMODE. This equivalencing of bytes and items
C should make it possible to write higher level routines which are
C portable between computers, although the routines here are NOT
C portable to non-byte computers.
C
C the calls provided are:
C
C call QOPEN(IUNIT,NAME,ATTRIBUTE) ;open file
C call QCLOSE(IUNIT) ;close file
C call QMODE(IUNIT,MODE,NCHITM) ;set mode
C call QREAD(IUNIT,ARRAY,NITEMS,IER) ;read nitems
C call QWRITE(IUNIT,ARRAY,NITEMS) ;write nitems
C call QSEEK(IUNIT,IRECORD,IELEMENT,IRECLENGTH) ;move to irec,iel
C call QBACK(IUNIT,IRECLENGTH) ;backspace 1 record
C call QSKIP(IUNIT,IRECLENGTH) ;skip 1 record
C call QLOCATE(IUNIT,LOCATION) ;return disk location
C
C For files created by QOPEN, the user may set numeric values for the
C logical names CCP4_INITIAL and CCP4_EXTEND to specify the initial
C (default = 100) and extend sizes (default = 30) for the file.
C
C QSEEK calculates the location as follows:
C LOCATION = (IRECORD - 1)*IRECLENGTH + IELEMENT
C
C NOTE: as in FORTRAN, addressing begins at 1 for BOTH record & element
C
C where:
C IUNIT = Variable used to contain channel # (SET by QOPEN!!!)
C NAME = either a LOGICAL or FILE name to be associated with unit
C ATTRIBUTE = one of the following: 'NEW' 'OLD' 'RO' 'SCRATCH' 'UNKNOWN'
C ARRAY = starting location for data storage in core
C NITEMS = number of items to transfer
C IER = error flag (0 = no error) else # of bytes transferred
C IRECORD = desired record # (starts @ 1)
C IELEMENT = desired element # within record (items) (starts @ 1)
C IRECLENGTH = record length in items
C LENGTH = returned file size in bytes
C LOCATION = returned location of disk pointer in items (starts @ 1)
C MODE = file mode, to set correspondence between an item in the
C file, and one machine character (byte).
C mode 0 = bytes, 1 = short integers (*2), 2 = words
C (reals or integers), 3 = short complex (2 integer*2),
C 4 = complex
C NCHITM = returned as number of characters (bytes) / item
C
C
C
C Last Update: 01.10.82 DAA VAX
C 02.05.84 PRE item counting
C 24.09.93 IJT remove macro calls
C
C For CCP compatibilty, added entries
C QQOPEN(IUNIT,NAME,ISTAT) calls QOPEN, sets file status
C from ISTAT = 1 'UNKNOWN'
C = 2 'SCRATCH'
C = 3 'OLD'
C = 4 'NEW'
C = 5 'READONLY'
C Also sets default mode = 2
C
C QQINQ(IUNIT,LFN,NAME,LENGTH) get full name & length of file
C
C
SUBROUTINE DISKIO
C =================
C
C==== NRBLK = Number of physical blocks/logical block
C.... Note the user may try varying NRBLK in the range 1...127 (=MAXDO),
C but the other parameters should be left alone!
C==== NCMAX = Maximum number of channels open simultaneously
C==== NPBSZ = Physical block size on disk
C==== MAXDO = Maximum number of physical blocks in one transfer
C==== MAXMO = Maximum mode value
C==== NBALQ = Default initial physical block allocation
C==== NBDEQ = Default extension physical block allocation
C
IMPLICIT NONE
INTEGER NRBLK, NCMAX, NPBSZ, MAXDO, MAXMO, NBALQ, NBDEQ, NSIZE,
& NSIZE1, I2P15, I2P16
PARAMETER (NRBLK=64, NCMAX=10, NPBSZ=512, MAXDO=127, MAXMO=6,
& NBALQ=100, NBDEQ=30, NSIZE=NRBLK*NPBSZ, NSIZE1=NSIZE+1,
& I2P15=2**15, I2P16=2**16)
C
C==== Declare system calls, parameters, record structures etc etc ...
C
INCLUDE '($SYSSRVNAM)'
INCLUDE '($RMSDEF)'
INCLUDE '($FABDEF)'
INCLUDE '($NAMDEF)'
INCLUDE '($RABDEF)'
INCLUDE '($XABDEF)'
INCLUDE '($XABFHCDEF)'
C
RECORD /FABDEF/ FAB(NCMAX)
RECORD /NAMDEF/ NAM(NCMAX)
RECORD /RABDEF/ RAB(NCMAX)
C
STRUCTURE /MAPXABDEF/
UNION
MAP
RECORD /XABDEF/ XAB
ENDMAP
MAP
RECORD /XABFHCDEF/ XABFHC
ENDMAP
ENDUNION
ENDSTRUCTURE
C
RECORD /MAPXABDEF/ MAPXAB(NCMAX)
C
BYTE ARRAY(*), BUFFER(NSIZE,NCMAX), MS(4)
CHARACTER ATBUTE*(*), ATTRIB*1, FILNAM*(*), MSG*80, NAME*(*),
& UNK*7
CHARACTER FNAME(NCMAX)*127
LOGICAL EXIST
LOGICAL BUFACT(NCMAX), WRTACT(NCMAX), NEW(NCMAX), LUNIT(NCMAX)
INTEGER I, IEL, IER, IREC, IRET, IUNIT, L, LENGTH, LOCATION,
& LRECL, MCHITM, MODE, MTIT, MTRT, NBYTES, MODE1, MAXNC
INTEGER IBY, INDEX, ISAVE, ISTAT, IVBLK, J, JEL, KEL, KRECSZ,
& NBY, NDO, NLEFT, NOBLK, NTOMOV
INTEGER LRECSZ(NCMAX), MRECSZ(NCMAX), MODES(0:MAXMO),
& MSIT(NCMAX), MSRT(NCMAX), NCHITM(NCMAX), NEL(NCMAX),
& NMODE(NCMAX), NRECSZ(NCMAX), NVBLK(NCMAX)
INTEGER LENSTR
REAL BUF(NSIZE/4,NCMAX)
EQUIVALENCE(BUFFER,BUF)
COMMON /DISKIO_MODES_/ MAXNC, NMODE
DATA MAXNC/NCMAX/
DATA UNK/'UNKNOWN'/, LUNIT/NCMAX*.TRUE./
SAVE
C
C Item length for each mode: these correspond to map/image modes 0 to 6
C byte, integer*2, real*4, complex*4, complex*8, unused, integer*4
DATA MODES/ 1, 2, 4, 4, 8, 0, 4 /
C
C
C#######################################################################
C
C
C*QOPEN
ENTRY QOPEN(IUNIT,NAME,ATBUTE)
C ==============================
C
C FIND NEXT AVAILABLE UNIT #
C
DO 10 J = 1,NCMAX
10 IF (LUNIT(J)) GOTO 20
WRITE(6,'(/A,I4)') ' Max available unit= ',NCMAX
C
C==== Maybe this should be a soft fail: IUNIT = -1 ?
C
CALL CCPERR(1,'QOPEN error: No available units !!')
IUNIT = -1
RETURN
C
20 IUNIT = J
LUNIT(IUNIT) = .FALSE.
NMODE(IUNIT) = 2
NCHITM(IUNIT) = 4
C
C==== Identify File Access Block.
C
FAB(IUNIT).FAB$B_BID = FAB$C_BID
FAB(IUNIT).FAB$B_BLN = FAB$C_BLN
C
C==== File name address & size, clear file-processing options.
C
FAB(IUNIT).FAB$L_FNA = %LOC(NAME)
L = MIN(LENSTR(NAME),255)
IF (L.GT.127) L = L - 256
FAB(IUNIT).FAB$B_FNS = L
FAB(IUNIT).FAB$L_FOP = 0
C
C==== File organisation is sequential.
C
FAB(IUNIT).FAB$B_ORG = FAB$C_SEQ
C
C==== Pretend record format is stream_lf for C's benefit.
C
FAB(IUNIT).FAB$B_RFM = FAB$C_STMLF
C
C==== NAM and XAB addresses.
C
FAB(IUNIT).FAB$L_NAM = %LOC(NAM(IUNIT))
FAB(IUNIT).FAB$L_XAB = %LOC(MAPXAB(IUNIT))
C
C==== Identify NAMe block.
C
NAM(IUNIT).NAM$B_BID = NAM$C_BID
NAM(IUNIT).NAM$B_BLN = NAM$C_BLN
C
C==== Expanded string address and size.
C
NAM(IUNIT).NAM$L_ESA = %LOC(FNAME(IUNIT))
NAM(IUNIT).NAM$B_ESS = LEN(FNAME(1))
FNAME(IUNIT) = ' '
C
C==== Identify as eXtended Attributes Block for File Header Characteristics.
C
MAPXAB(IUNIT).XAB.XAB$B_COD = XAB$C_FHC
MAPXAB(IUNIT).XAB.XAB$B_BLN = XAB$C_FHCLEN
C
ATTRIB = ATBUTE
IF (ATTRIB.EQ.'R') THEN
C
C==== File access mode is block i/o readonly.
C
FAB(IUNIT).FAB$B_FAC = FAB$M_BIO .OR. FAB$M_GET
C
C==== Open existing file.
C
ISTAT = SYS$OPEN(FAB(IUNIT))
NEW(IUNIT) = .FALSE.
ELSEIF (ATTRIB.EQ.'O') THEN
C
C==== File access mode is block i/o read/write.
C
FAB(IUNIT).FAB$B_FAC = FAB$M_BIO .OR. FAB$M_GET .OR. FAB$M_PUT
C
C==== Open existing file.
C
ISTAT = SYS$OPEN(FAB(IUNIT))
NEW(IUNIT) = .FALSE.
ELSE
C
C==== Default allocation and extension quantities.
C
FAB(IUNIT).FAB$L_ALQ = NBALQ
FAB(IUNIT).FAB$W_DEQ = NBDEQ
C
C==== Reset from user-defined logical names if present.
C
CALL UGTENV('CCP4_INITIAL',MSG)
IF (MSG.NE.' ') READ (MSG,*,ERR=30) FAB(IUNIT).FAB$L_ALQ
30 CALL UGTENV('CCP4_EXTEND',MSG)
IF (MSG.NE.' ') READ (MSG,*,ERR=40) FAB(IUNIT).FAB$W_DEQ
C
C==== File access mode is block i/o read/write.
C
40 FAB(IUNIT).FAB$B_FAC = FAB$M_GET .OR. FAB$M_PUT .OR. FAB$M_BIO
C
IF (ATTRIB.EQ.'S') THEN
C
C==== Scratch file is temporary/marked-for-delete.
C
FAB(IUNIT).FAB$L_FOP = FAB$M_TMD
C
ELSE
C
C==== Create max version & truncate new file at EOF.
C
FAB(IUNIT).FAB$L_FOP = FAB$M_MXV .OR. FAB$M_TEF
C
IF (ATTRIB.EQ.'N') THEN
CALL UGTENV('CCP4_OPEN',MSG)
L = LENSTR(MSG)
IF (L.GT.0 .AND. L.LE.7) THEN
IF (MSG(:L).EQ.UNK(:L)) ATTRIB = 'U'
ENDIF
ENDIF
C
C==== If UNKNOWN set Create-IF.
C
IF (ATTRIB.EQ.'U')
& FAB(IUNIT).FAB$L_FOP = FAB(IUNIT).FAB$L_FOP .OR. FAB$M_CIF
ENDIF
C
C==== Create new or open existing file, depending on CIF setting.
C
ISTAT = SYS$CREATE(FAB(IUNIT))
NEW(IUNIT) = .TRUE.
ENDIF
C
IF (ISTAT) THEN
C
C==== Identify Record Access Block.
C
RAB(IUNIT).RAB$B_BID = RAB$C_BID
RAB(IUNIT).RAB$B_BLN = RAB$C_BLN
C
C==== FAB address and internal stream identifier.
C
RAB(IUNIT).RAB$L_FAB = %LOC(FAB(IUNIT))
RAB(IUNIT).RAB$W_ISI = 0
C
C==== Record processing option is block i/o
C
RAB(IUNIT).RAB$L_ROP = RAB$M_BIO
C
C==== Connect RAB.
C
ISTAT = SYS$CONNECT(RAB(IUNIT))
ENDIF
C
IF (.NOT.ISTAT) THEN
CALL LIB$SYS_GETMSG(ISTAT,L,MSG)
WRITE (*,'(/1X,2A,I4,2A)')
& ATBUTE(1:MIN(30,LENSTR(ATBUTE))),' file open error on unit',
& IUNIT,', Logical name: ',NAME(:MIN(50,LENSTR(NAME)))
WRITE(*,FMT='(//,1X,A)') MSG(1:MIN(130,L))
C
C==== Maybe this should be a soft fail: IUNIT = -1 ?
C
CALL CCPERR(1,'QOPEN: FATAL ERROR')
IUNIT = -1
RETURN
ENDIF
C
WRITE (*,'(/1X,2A,I4,2A)')
&ATBUTE(:MIN(30,LENSTR(ATBUTE))),' file opened on unit',IUNIT,
&', Logical name: ',NAME(:MIN(50,LENSTR(NAME)))
WRITE (*,'(/,2A)')
& ' File name: ',FNAME(IUNIT)(:MIN(100,LENSTR(FNAME(IUNIT))))
IF (NEW(IUNIT)) THEN
WRITE (*,'(A,2I8/)')
& ' Initial & extend sizes in physical blocks =',
& FAB(IUNIT).FAB$L_ALQ,FAB(IUNIT).FAB$W_DEQ
ELSE
WRITE (*,'(A,I10/)') ' File size in physical blocks =',
& MAPXAB(IUNIT).XABFHC.XAB$L_EBK - 1 +
& (MAPXAB(IUNIT).XABFHC.XAB$W_FFB + NPBSZ - 1) / NPBSZ
ENDIF
C
LRECSZ(IUNIT) = NSIZE
MRECSZ(IUNIT) = 0
NRECSZ(IUNIT) = 0
NVBLK(IUNIT) = 1
NEL(IUNIT) = 1
BUFACT(IUNIT) = .FALSE.
WRTACT(IUNIT) = .FALSE.
C
C==== Initialise source machine integer and real types.
C
MSIT(IUNIT)=0
MSRT(IUNIT)=0
C
C==== Fill buffer with 0's.
C
IF (NSIZE.LT.I2P15) THEN
CALL LIB$MOVC5(0,,0,NSIZE,BUFFER(1,IUNIT))
ELSE
C==== Convert buffer size to unsigned integer.
CALL LIB$MOVC5(0,,0,NSIZE-I2P16,BUFFER(1,IUNIT))
ENDIF
RETURN
C
C
C#######################################################################
C
C
C*QCLOSE
ENTRY QCLOSE(IUNIT)
C ===================
C
C==== Maybe this should be a soft fail: IUNIT = -1 ?
C
IF (LUNIT(IUNIT)) THEN
CALL CCPERR(1,'QCLOSE error: File not open.')
IUNIT = -1
RETURN
ENDIF
C
ISTAT = 1
IF (WRTACT(IUNIT) .AND. BUFACT(IUNIT)) THEN
IF (MRECSZ(IUNIT).GT.0) THEN
NOBLK = (LRECSZ(IUNIT) - 1) / NPBSZ
KEL = NPBSZ * NOBLK
KRECSZ = MRECSZ(IUNIT)
IF (KRECSZ.LT.NRECSZ(IUNIT)) KRECSZ =
& MIN(NPBSZ * ((KRECSZ - 1) / NPBSZ + 1), NRECSZ(IUNIT))
KRECSZ = KRECSZ - KEL
IF (KRECSZ.GE.I2P15) KRECSZ = KRECSZ - I2P16
C
C==== Virtual block number, record buffer address and size.
C
RAB(IUNIT).RAB$L_BKT = NVBLK(IUNIT) + NOBLK
RAB(IUNIT).RAB$L_RBF = %LOC(BUFFER(KEL+1,IUNIT))
RAB(IUNIT).RAB$W_RSZ = KRECSZ
C
C==== Write out the block.
C
ISTAT = SYS$WRITE(RAB(IUNIT))
D WRITE (*,'(A,5I8)') ' SYS$WRITE 1:',
D & IUNIT,NVBLK(IUNIT)+NOBLK,KEL+1,KRECSZ,ISTAT
IF (.NOT.ISTAT) THEN
CALL LIB$SYS_GETMSG(ISTAT,L,MSG)
WRITE (*,'(/1X,A/)') MSG(:MIN(130,L))
ENDIF
ENDIF
ENDIF
LUNIT(IUNIT) = .TRUE. !FREE THIS UNIT #
C
C==== Close the file.
C
ISAVE = ISTAT
ISTAT = SYS$CLOSE(FAB(IUNIT))
IF (.NOT.ISTAT) THEN
CALL LIB$SYS_GETMSG(ISTAT,L,MSG)
WRITE (*,'(/1X,A/)') MSG(:MIN(130,L))
ENDIF
C IF (.NOT.ISAVE .OR. .NOT.ISTAT)
C &CALL CCPERR(1,'QCLOSE: FATAL ERROR.')
RETURN
C
C
C#######################################################################
C
C
C*QMODE
ENTRY QMODE(IUNIT,MODE,MCHITM)
C ==============================
C
C==== Maybe this should be a soft fail: IUNIT = -1 ?
C
IF (LUNIT(IUNIT)) THEN
CALL CCPERR(1,'QMODE error: File not open.')
IUNIT = -1
RETURN
ENDIF
C Check if recognized mode
IF (MODE.GE.0 .AND. MODE.LE.MAXMO) THEN
MCHITM=MAX(MODES(MODE),1)
ELSE
MCHITM=1
ENDIF
NMODE(IUNIT)=MODE
NCHITM(IUNIT)=MCHITM
RETURN
C
C
C#######################################################################
C
C
C*QREAD
ENTRY QREAD(IUNIT,ARRAY,NBYTES,IER)
ENTRY QREADR(IUNIT,ARRAY,NBYTES,IER)
ENTRY QREADI(IUNIT,ARRAY,NBYTES,IER)
ENTRY QREADQ(IUNIT,ARRAY,NBYTES,IER)
C ===================================
C
C==== Maybe this should be a soft fail: IUNIT = -1 ?
C
45 IF (IUNIT.GT.MAXNC .OR. IUNIT.LT.1)
+ CALL CCPERR (1,'QREAD: bad stream number')
IF (LUNIT(IUNIT)) THEN
CALL CCPERR(1,'QREAD error: File not open.')
IUNIT = -1
RETURN
ENDIF
NTOMOV = NBYTES * NCHITM(IUNIT)
IER = 0
INDEX = 1
NEW(IUNIT) = .FALSE.
D WRITE (*,'(A,2I8)') ' QREAD 1:',NTOMOV,NEL(IUNIT)
C
IF (.NOT.BUFACT(IUNIT)) THEN
C
C==== Virtual block number, user buffer address and size.
C
RAB(IUNIT).RAB$L_BKT = NVBLK(IUNIT)
RAB(IUNIT).RAB$L_UBF = %LOC(BUFFER(1,IUNIT))
RAB(IUNIT).RAB$W_USZ = NSIZE
C
C==== Read in the block.
C
ISTAT = SYS$READ(RAB(IUNIT))
NRECSZ(IUNIT) = RAB(IUNIT).RAB$W_RSZ
IF (NRECSZ(IUNIT).LT.0) NRECSZ(IUNIT) = NRECSZ(IUNIT) + I2P16
D WRITE (*,'(A,6I8)') ' SYS$READ 1:',
D & IUNIT,NVBLK(IUNIT),1,NSIZE,ISTAT,NRECSZ(IUNIT)
IF (.NOT.ISTAT) GOTO 60
C WRITE (*,'(1X,16F8.0)') (BUF(I,IUNIT),I=1,NSIZE/4)
BUFACT(IUNIT) = .TRUE.
ENDIF
C
50 NLEFT = NRECSZ(IUNIT) + 1 - NEL(IUNIT)
IF (NTOMOV.LE.NLEFT) THEN
D WRITE (*,'(A,3I8)') ' QREAD 2:',NTOMOV,NEL(IUNIT),INDEX
C
C==== Move NTOMOV bytes from record BUFFER to user's ARRAY.
C
IF (NTOMOV.LT.I2P15) THEN
CALL LIB$MOVC3(NTOMOV,BUFFER(NEL(IUNIT),IUNIT),ARRAY(INDEX))
ELSE
C==== Convert buffer size to unsigned integer.
CALL LIB$MOVC3(NTOMOV-I2P16,BUFFER(NEL(IUNIT),IUNIT),
& ARRAY(INDEX))
ENDIF
NEL(IUNIT) = NEL(IUNIT) + NTOMOV
GOTO 100
ELSE
IF (NLEFT.GT.0) THEN
D WRITE (*,'(A,3I8)') ' QREAD 3:',NLEFT,NEL(IUNIT),INDEX
C
C==== Move NLEFT bytes from record BUFFER to user's ARRAY.
C
IF (NLEFT.LT.I2P15) THEN
CALL LIB$MOVC3(NLEFT,BUFFER(NEL(IUNIT),IUNIT),ARRAY(INDEX))
ELSE
C==== Convert buffer size to unsigned integer.
CALL LIB$MOVC3(NLEFT-I2P16,BUFFER(NEL(IUNIT),IUNIT),
& ARRAY(INDEX))
ENDIF
NTOMOV = NTOMOV - NLEFT
INDEX = INDEX + NLEFT
ENDIF
IF (WRTACT(IUNIT)) THEN
IF (MRECSZ(IUNIT).GT.0) THEN
NOBLK = (LRECSZ(IUNIT) - 1) / NPBSZ
KEL = NPBSZ * NOBLK
KRECSZ = MRECSZ(IUNIT)
IF (KRECSZ.LT.NRECSZ(IUNIT)) KRECSZ =
& MIN(NPBSZ * ((KRECSZ - 1) / NPBSZ + 1), NRECSZ(IUNIT))
KRECSZ = KRECSZ - KEL
IF (KRECSZ.GE.I2P15) KRECSZ = KRECSZ - I2P16
RAB(IUNIT).RAB$L_BKT = NVBLK(IUNIT) + NOBLK
RAB(IUNIT).RAB$L_RBF = %LOC(BUFFER(KEL+1,IUNIT))
RAB(IUNIT).RAB$W_RSZ = KRECSZ
ISTAT = SYS$WRITE(RAB(IUNIT))
D WRITE (*,'(A,5I8)') ' SYS$WRITE 2:',
D & IUNIT,NVBLK(IUNIT)+NOBLK,KEL+1,KRECSZ,ISTAT
IF (.NOT.ISTAT) THEN
CALL LIB$SYS_GETMSG(ISTAT,L,MSG)
WRITE (*,'(/1X,A/)') MSG(:MIN(130,L))
CALL CCPERR(1,'QREAD: FATAL ERROR.')
IER = -1
RETURN
ENDIF
LRECSZ(IUNIT) = NSIZE
MRECSZ(IUNIT) = 0
NRECSZ(IUNIT) = 0
ENDIF
WRTACT(IUNIT) = .FALSE.
ENDIF
NVBLK(IUNIT) = NVBLK(IUNIT) + NRBLK
NEL(IUNIT) = 1
IF (NTOMOV.GE.NSIZE) THEN
NDO = MIN(NTOMOV/NPBSZ, MAXDO)
NBY = NDO*NPBSZ
C
C==== Convert buffer size to unsigned integer.
C
IF (NBY.LT.I2P15) THEN
IBY = NBY
ELSE
IBY = NBY - I2P16
ENDIF
RAB(IUNIT).RAB$L_BKT = NVBLK(IUNIT)
RAB(IUNIT).RAB$L_UBF = %LOC(ARRAY(INDEX))
RAB(IUNIT).RAB$W_USZ = IBY
ISTAT = SYS$READ(RAB(IUNIT))
D NRECSZ(IUNIT) = RAB(IUNIT).RAB$W_RSZ
D IF (NRECSZ(IUNIT).LT.0) NRECSZ(IUNIT) = NRECSZ(IUNIT) + I2P16
D WRITE (*,'(A,6I8)') ' SYS$READ 2:',
D & IUNIT,NVBLK(IUNIT),INDEX,IBY,ISTAT,NRECSZ(IUNIT)
IF (.NOT.ISTAT) GOTO 60
NTOMOV = NTOMOV - NBY
NVBLK(IUNIT) = NVBLK(IUNIT) + NDO
IF (NTOMOV.EQ.0) THEN
BUFACT(IUNIT) = .FALSE.
GOTO 100
ENDIF
INDEX = INDEX + NBY
ENDIF
RAB(IUNIT).RAB$L_BKT = NVBLK(IUNIT)
RAB(IUNIT).RAB$L_UBF = %LOC(BUFFER(1,IUNIT))
RAB(IUNIT).RAB$W_USZ = NSIZE
ISTAT = SYS$READ(RAB(IUNIT))
NRECSZ(IUNIT) = RAB(IUNIT).RAB$W_RSZ
IF (NRECSZ(IUNIT).LT.0) NRECSZ(IUNIT) = NRECSZ(IUNIT) + I2P16
D WRITE (*,'(A,6I8)') ' SYS$READ 3:',
D & IUNIT,NVBLK(IUNIT),1,NSIZE,ISTAT,NRECSZ(IUNIT)
IF (.NOT.ISTAT) GOTO 60
C WRITE (*,'(1X,16F8.0)') (BUF(I,IUNIT),I=1,NSIZE/4)
ENDIF
GOTO 50
C
60 IF (ISTAT.NE.RMS$_EOF) THEN
CALL LIB$SYS_GETMSG(ISTAT,L,MSG)
WRITE (*,'(/1X,A/)') MSG(:MIN(130,L))
CALL CCPERR(1,'QREAD: FATAL ERROR.')
ENDIF
BUFACT(IUNIT) = .FALSE.
IER = NBYTES - NTOMOV/NCHITM(IUNIT)
IF (IER.EQ.0) IER = -1
C
100 IF (IER.EQ.0) THEN
NTOMOV=NBYTES*NCHITM(IUNIT)
ELSE
NTOMOV=MAX(IER,0)*NCHITM(IUNIT)
ENDIF
C WRITE(6,*)'NMODE =',NMODE(IUNIT)
C
C==== Check if source machine integer conversion required.
C
IF (MSIT(IUNIT).NE.0) THEN
C
C==== INTEGER*2 or *4 mode ?
C
IF (NMODE(IUNIT).EQ.1 .OR. NMODE(IUNIT).EQ.3) THEN
CALL QSWAP1(NTOMOV,ARRAY)
ELSEIF (NMODE(IUNIT).EQ.6) THEN
CALL QSWAP3(NTOMOV,ARRAY)
ENDIF
ENDIF
C
C==== Check if source machine real conversion required.
C
IF (MSRT(IUNIT).NE.0) THEN
IF (NMODE(IUNIT).EQ.2 .OR. NMODE(IUNIT).EQ.4) THEN
IF (MTRT.EQ.2) THEN
C
C==== Target machine is VAX; check source machine type for byte swap.
C
IF (MSRT(IUNIT).NE.4) CALL QSWAP3(NTOMOV,ARRAY)
C
C==== Check for Convex native. If IEEE convert from IEEE.
C
IF (MSRT(IUNIT).NE.5) CALL QFIEEE(NTOMOV/4,ARRAY)
C
C==== Swap to VAX byte order.
C
CALL QSWAP2(NTOMOV,ARRAY)
C
ELSEIF (MTRT.EQ.4) THEN
C
C==== Target machine is L-E/IEEE; check source machine type for byte swap.
C
IF (MSRT(IUNIT).EQ.2) THEN
CALL QSWAP2(NTOMOV,ARRAY)
ELSE
CALL QSWAP3(NTOMOV,ARRAY)
ENDIF
C
C==== If not IEEE convert to IEEE.
C
IF (MSRT(IUNIT).NE.1) CALL QTIEEE(NTOMOV/4,ARRAY)
C
ELSEIF (MTRT.EQ.1) THEN
C
C==== Target machine is B-E/IEEE; check source machine type for byte swap.
C
IF (MSRT(IUNIT).EQ.2) THEN
CALL QSWAP1(NTOMOV,ARRAY)
ELSEIF (MSRT(IUNIT).EQ.4) THEN
CALL QSWAP3(NTOMOV,ARRAY)
ENDIF
C
C==== If not IEEE convert to IEEE.
C
IF (MSRT(IUNIT).NE.4) CALL QTIEEE(NTOMOV/4,ARRAY)
ELSE
CALL CCPERR(1,'*** QREAD: Bad machine REAL type.')
ENDIF
ENDIF
ENDIF
RETURN
C
C
C#######################################################################
C
C
C*QWRITE
ENTRY QWRITE(IUNIT,ARRAY,NBYTES)
ENTRY QWRITI(IUNIT,ARRAY,NBYTES)
ENTRY QWRITR(IUNIT,ARRAY,NBYTES)
ENTRY QWRITQ(IUNIT,ARRAY,NBYTES)
C ================================
C
C==== Maybe this should be a soft fail: IUNIT = -1 ?
C
IF (IUNIT.GT.MAXNC .OR. IUNIT.LT.1)
+ CALL CCPERR (1,'QREAD: bad stream number')
IF (LUNIT(IUNIT)) THEN
CALL CCPERR(1,'QWRITE error: File not open.')
IUNIT = -1
RETURN
ENDIF
INDEX = 1
NTOMOV = NBYTES * NCHITM(IUNIT)
D WRITE (*,'(A,2I8)') ' QWRITE 1:',NTOMOV,NEL(IUNIT)
IF (NEL(IUNIT).GT.NSIZE) THEN
IF (WRTACT(IUNIT)) THEN
IF (MRECSZ(IUNIT).GT.0) THEN
NOBLK = (LRECSZ(IUNIT) - 1) / NPBSZ
KEL = NPBSZ * NOBLK
KRECSZ = NPBSZ * ((MRECSZ(IUNIT) - 1) / NPBSZ + 1) - KEL
IF (KRECSZ.GE.I2P15) KRECSZ = KRECSZ - I2P16
RAB(IUNIT).RAB$L_BKT = NVBLK(IUNIT) + NOBLK
RAB(IUNIT).RAB$L_RBF = %LOC(BUFFER(KEL+1,IUNIT))
RAB(IUNIT).RAB$W_RSZ = KRECSZ
ISTAT = SYS$WRITE(RAB(IUNIT))
D WRITE (*,'(A,5I8)') ' SYS$WRITE 3:',
D & IUNIT,NVBLK(IUNIT)+NOBLK,KEL+1,KRECSZ,ISTAT
IF (.NOT.ISTAT) GOTO 80
LRECSZ(IUNIT) = NSIZE
MRECSZ(IUNIT) = 0
NRECSZ(IUNIT) = 0
ENDIF
ENDIF
NEL(IUNIT) = 1
NVBLK(IUNIT) = NVBLK(IUNIT) + NRBLK
BUFACT(IUNIT) = .FALSE.
ENDIF
WRTACT(IUNIT) = .TRUE.
C
70 NLEFT = NSIZE1 - NEL(IUNIT)
IF (.NOT.BUFACT(IUNIT)) THEN
IF (NEL(IUNIT).GT.1 .OR. NTOMOV.LT.NSIZE) THEN
IF (.NOT.NEW(IUNIT)) THEN
RAB(IUNIT).RAB$L_BKT = NVBLK(IUNIT)
RAB(IUNIT).RAB$L_UBF = %LOC(BUFFER(1,IUNIT))
RAB(IUNIT).RAB$W_USZ = NSIZE
ISTAT = SYS$READ(RAB(IUNIT))
NRECSZ(IUNIT) = RAB(IUNIT).RAB$W_RSZ
IF (NRECSZ(IUNIT).LT.0)
& NRECSZ(IUNIT) = NRECSZ(IUNIT) + I2P16
D WRITE (*,'(A,6I8)') ' SYS$READ 4:',
D & IUNIT,NVBLK(IUNIT),1,NSIZE,ISTAT,NRECSZ(IUNIT)
C
C ERROR=BLANK FILE
C
C==== Fill buffer with 0's.
C
IF (.NOT.ISTAT) THEN
IF (NSIZE.LT.I2P15) THEN
CALL LIB$MOVC5(0,,0,NSIZE,BUFFER(1,IUNIT))
ELSE
C==== Convert buffer size to unsigned integer.
CALL LIB$MOVC5(0,,0,NSIZE-I2P16,BUFFER(1,IUNIT))
ENDIF
ENDIF
ENDIF
ENDIF
BUFACT(IUNIT) = .TRUE.
ENDIF
C
IF (NTOMOV.LE.NLEFT) THEN
D WRITE (*,'(A,3I8)') ' QWRITE 2:',NTOMOV,NEL(IUNIT),INDEX
C
C==== Move NTOMOV bytes from user's ARRAY to record BUFFER.
C
IF (NTOMOV.LT.I2P15) THEN
CALL LIB$MOVC3(NTOMOV,ARRAY(INDEX),BUFFER(NEL(IUNIT),IUNIT))
ELSE
C==== Convert buffer size to unsigned integer.
CALL LIB$MOVC3(NTOMOV-I2P16,ARRAY(INDEX),
& BUFFER(NEL(IUNIT),IUNIT))
ENDIF
LRECSZ(IUNIT)=MIN(LRECSZ(IUNIT),NEL(IUNIT))
NEL(IUNIT) = NEL(IUNIT) + NTOMOV
MRECSZ(IUNIT)=MAX(MRECSZ(IUNIT),NEL(IUNIT)-1)
NRECSZ(IUNIT)=MAX(NRECSZ(IUNIT),MRECSZ(IUNIT))
RETURN
ELSE
D WRITE (*,'(A,3I8)') ' QWRITE 3:',NLEFT,NEL(IUNIT),INDEX
C
C==== Move NLEFT bytes from user's ARRAY to record BUFFER.
C
IF (NLEFT.LT.I2P15) THEN
CALL LIB$MOVC3(NLEFT,ARRAY(INDEX),BUFFER(NEL(IUNIT),IUNIT))
ELSE
C==== Convert buffer size to unsigned integer.
CALL LIB$MOVC3(NLEFT-I2P16,ARRAY(INDEX),
& BUFFER(NEL(IUNIT),IUNIT))
ENDIF
NOBLK = (MIN(LRECSZ(IUNIT),NEL(IUNIT)) - 1) / NPBSZ
KEL = NPBSZ * NOBLK
KRECSZ = NPBSZ * NRBLK - KEL
IF (KRECSZ.GE.I2P15) KRECSZ = KRECSZ - I2P16
RAB(IUNIT).RAB$L_BKT = NVBLK(IUNIT) + NOBLK
RAB(IUNIT).RAB$L_RBF = %LOC(BUFFER(KEL+1,IUNIT))
RAB(IUNIT).RAB$W_RSZ = KRECSZ
ISTAT = SYS$WRITE(RAB(IUNIT))
D WRITE (*,'(A,5I8)') ' SYS$WRITE 4:',
D & IUNIT,NVBLK(IUNIT)+NOBLK,KEL+1,KRECSZ,ISTAT
IF (.NOT.ISTAT) GOTO 80
LRECSZ(IUNIT) = NSIZE
MRECSZ(IUNIT) = 0
NRECSZ(IUNIT) = 0
NVBLK(IUNIT) = NVBLK(IUNIT) + NRBLK
NEL(IUNIT) = 1
NTOMOV = NTOMOV - NLEFT
INDEX = INDEX + NLEFT
BUFACT(IUNIT) = .FALSE.
C
IF (NTOMOV.GT.NSIZE) THEN
NDO = MIN(NTOMOV/NPBSZ, MAXDO)
NBY = NDO*NPBSZ
IF (NBY.LT.I2P15) THEN
IBY = NBY
ELSE
IBY = NBY - I2P16
ENDIF
RAB(IUNIT).RAB$L_BKT = NVBLK(IUNIT)
RAB(IUNIT).RAB$L_RBF = %LOC(ARRAY(INDEX))
RAB(IUNIT).RAB$W_RSZ = IBY
ISTAT = SYS$WRITE(RAB(IUNIT))
D WRITE (*,'(A,5I8)') ' SYS$WRITE 5:',
D & IUNIT,NVBLK(IUNIT),1,IBY,ISTAT
IF (.NOT.ISTAT) GOTO 80
NVBLK(IUNIT) = NVBLK(IUNIT) + NDO
INDEX = INDEX + NBY
NTOMOV = NTOMOV - NBY
ENDIF
ENDIF
GOTO 70
C
80 CALL LIB$SYS_GETMSG(ISTAT,L,MSG)
WRITE (*,'(/1X,A/)') MSG(:MIN(130,L))
CALL CCPERR(1,'QWRITE: FATAL ERROR.')
RETURN
C
C
C#######################################################################
C
C
C*QBACK
ENTRY QBACK(IUNIT,LRECL)
C ========================
C
C==== Maybe this should be a soft fail: IUNIT = -1 ?
C
IF (LUNIT(IUNIT)) THEN
CALL CCPERR(1,'QBACK error: File not open.')
IUNIT = -1
RETURN
ENDIF
JEL = NEL(IUNIT) - LRECL * NCHITM(IUNIT)
IVBLK = (JEL - NSIZE)/NSIZE
JEL = JEL - IVBLK*NSIZE
IVBLK = NVBLK(IUNIT) + IVBLK*NRBLK
IF (IVBLK.LT.1) THEN
IVBLK = 1
JEL = 1
ENDIF
GOTO 90
C
C
C#######################################################################
C
C
C*QSKIP
ENTRY QSKIP(IUNIT,LRECL)
C ========================
C
C==== Maybe this should be a soft fail: IUNIT = -1 ?
C
IF (LUNIT(IUNIT)) THEN
IF (LUNIT(IUNIT)) CALL CCPERR(1,'QSKIP error: File not open.')
IUNIT = -1
RETURN
ENDIF
JEL = NEL(IUNIT) + LRECL*NCHITM(IUNIT) - 1
IVBLK = JEL/NSIZE
JEL = JEL - IVBLK*NSIZE + 1
IVBLK = NVBLK(IUNIT) + IVBLK*NRBLK
GOTO 90
C
C
C#######################################################################
C
C
C*QSEEK
ENTRY QSEEK(IUNIT,IREC,IEL,LRECL)
C =================================
C
C==== Maybe this should be a soft fail: IUNIT = -1 ?
C
IF (LUNIT(IUNIT)) THEN
CALL CCPERR(1,'QSEEK error: File not open.')
IUNIT = -1
RETURN
ENDIF
JEL = MAX(((IREC - 1)*LRECL + IEL - 1)*NCHITM(IUNIT), 0)
IVBLK = JEL/NSIZE
JEL = JEL - IVBLK*NSIZE + 1
IVBLK = IVBLK*NRBLK + 1
C
90 IF (IVBLK.NE.NVBLK(IUNIT)) THEN
IF (WRTACT(IUNIT) .AND. NEL(IUNIT).NE.1) THEN
IF (MRECSZ(IUNIT).GT.0) THEN
NOBLK = (LRECSZ(IUNIT) - 1) / NPBSZ
KEL = NPBSZ * NOBLK
KRECSZ = MRECSZ(IUNIT)
IF (KRECSZ.LT.NRECSZ(IUNIT)) KRECSZ =
& MIN(NPBSZ * ((KRECSZ - 1) / NPBSZ + 1), NRECSZ(IUNIT))
KRECSZ = KRECSZ - KEL
IF (KRECSZ.GE.I2P15) KRECSZ = KRECSZ - I2P16
RAB(IUNIT).RAB$L_BKT = NVBLK(IUNIT) + NOBLK
RAB(IUNIT).RAB$L_RBF = %LOC(BUFFER(KEL+1,IUNIT))
RAB(IUNIT).RAB$W_RSZ = KRECSZ
ISTAT = SYS$WRITE(RAB(IUNIT))
D WRITE (*,'(A,5I8)') ' SYS$WRITE 6:',
D & IUNIT,NVBLK(IUNIT)+NOBLK,KEL+1,KRECSZ,ISTAT
C
IF (.NOT.ISTAT) THEN
CALL LIB$SYS_GETMSG(ISTAT,L,MSG)
WRITE (*,'(/1X,A/)') MSG(:MIN(130,L))
CALL CCPERR(1,'QSEEK: FATAL ERROR -- MAYBE CORRUPT FILE.')
RETURN
ENDIF
LRECSZ(IUNIT) = NSIZE
MRECSZ(IUNIT) = 0
NRECSZ(IUNIT) = 0
ENDIF
WRTACT(IUNIT) = .FALSE.
ENDIF
NVBLK(IUNIT) = IVBLK
BUFACT(IUNIT) = .FALSE.
NEW(IUNIT) = .FALSE.
ENDIF
C
NEL(IUNIT) = JEL
D WRITE (*,'(A,8X,I8)') ' QSEEK :',NEL(IUNIT)
RETURN
C
C
C#######################################################################
C
C
C*QLOCATE
ENTRY QLOCATE(IUNIT,LOCATION)
C =============================
C
C==== Maybe this should be a soft fail: IUNIT = -1 ?
C
IF (LUNIT(IUNIT)) THEN
CALL CCPERR(1,'QLOCATE error: File not open.')
IUNIT = -1
RETURN
ENDIF
LOCATION = (NEL(IUNIT)+(NVBLK(IUNIT)-1)*NPBSZ+NCHITM(IUNIT)-1)/
& NCHITM(IUNIT)
RETURN
C
C
C#######################################################################
C
C
C*QQINQ
ENTRY QQINQ(IUNIT,NAME,FILNAM,LENGTH)
C =====================================
C
C RETURNS FILE NAME AND LENGTH
C IF NO NAME RETURN NAME AS BLANK, IF NO LENGTH RETURN LENGTH AS -1
C
IF (LUNIT(IUNIT)) THEN
INQUIRE (FILE=NAME,NAME=FILNAM)
LENGTH = -1
ELSE
FILNAM = FNAME(IUNIT)
LENGTH = NPBSZ * (MAPXAB(IUNIT).XABFHC.XAB$L_EBK - 1) +
& MAPXAB(IUNIT).XABFHC.XAB$W_FFB
ENDIF
RETURN
C
C
C#######################################################################
C
C
ENTRY QSETMS(IUNIT,MS,IRET)
C ===========================
C
C==== Get machine integer and real types.
C
CALL QIRTYP(MTIT,MTRT)
C
C==== Get file integer and real types.
C
MSIT(IUNIT)=MS(2)/16
IF (MSIT(IUNIT).NE.0 .AND. MSIT(IUNIT).NE.1 .AND.
& MSIT(IUNIT).NE.4) THEN
WRITE (6,*) '*** BAD FILE INTEGER TYPE, ASSUME NATIVE ***'
MSIT(IUNIT)=0
ENDIF
MSRT(IUNIT)=MS(1)/16
IF ((MSRT(IUNIT).LT.0 .OR. MSRT(IUNIT).GT.2) .AND.
& MSRT(IUNIT).NE.4 .AND. MSRT(IUNIT).NE.5) THEN
WRITE (6,*) '*** BAD FILE REAL TYPE, ASSUME NATIVE ***'
MSIT(IUNIT)=0
ENDIF
IF (MSIT(IUNIT).EQ.0) MSRT(IUNIT)=0
IRET=16*MSIT(IUNIT)+MSRT(IUNIT)
IF (MSIT(IUNIT).EQ.MTIT) MSIT(IUNIT)=0
IF (MSRT(IUNIT).EQ.MTRT) MSRT(IUNIT)=0
C WRITE (6,*) 'MSIT, MTIT, MSRT, MTRT =',
C & MSIT(IUNIT),MTIT,MSRT(IUNIT),MTRT
END
C
C
C#######################################################################
C
C
SUBROUTINE QQOPEN(IUNIT,NAME,ISTAT)
C ===================================
C
C Open file with name NAME, returns IUNIT as unit number
C
C
IMPLICIT NONE
CHARACTER*(*) NAME
INTEGER IUNIT, ISTAT, NCH
C
C
GOTO (10,20,30,40,50),ISTAT
10 CALL QOPEN(IUNIT,NAME,'UNKNOWN')
GOTO 100
20 CALL QOPEN(IUNIT,NAME,'SCRATCH')
GOTO 100
30 CALL QOPEN(IUNIT,NAME,'OLD')
GOTO 100
40 CALL QOPEN(IUNIT,NAME,'NEW')
GOTO 100
50 CALL QOPEN(IUNIT,NAME,'RO')
100 RETURN
END
C
C
C#######################################################################
C
C
SUBROUTINE QIRTYP(MI,MR)
C ========================
C==== Integer/Real types; assumes equal endedness of integers and reals.
IMPLICIT NONE
INTEGER*2 I(2)
INTEGER J,K,MI,MR
REAL A,B,R
PARAMETER (A=513./256., B=513./1024.)
EQUIVALENCE (I,J), (K,R)
DATA I/1,0/, K/1073758208/
IF (J.EQ.65536) THEN
C==== Big-endian.
MI=1
IF (R.EQ.A) THEN
C==== IEEE.
MR=1
ELSEIF (R.EQ.B) THEN
C==== Convex native.
MR=5
ELSE
MR=0
ENDIF
ELSEIF (J.EQ.1) THEN
C==== Little-endian.
MI=4
IF (R.EQ.A) THEN
C==== IEEE.
MR=4
ELSEIF (R.EQ.B) THEN
C==== VAX native.
MR=2
ELSE
MR=0
ENDIF
ELSE
MI=0
MR=0
ENDIF
END
C
C
C#######################################################################
C
C
SUBROUTINE QSWAP1(N,A)
C ======================
C
C==== Swap bytes N/N+1 for N = 0,2,4...
C
IMPLICIT NONE
INTEGER I,N
BYTE A(N),S
DO 10 I=1,N,2
S=A(I)
A(I)=A(I+1)
10 A(I+1)=S
END
C
C
C#######################################################################
C
C
SUBROUTINE QSWAP2(N,A)
C ======================
C
C==== Swap bytes N/N+2 and N+1/N+3 for N = 0,4,8...
C
IMPLICIT NONE
INTEGER I,N
BYTE A(N),S
DO 10 I=1,N,4
S=A(I)
A(I)=A(I+2)
A(I+2)=S
S=A(I+1)
A(I+1)=A(I+3)
10 A(I+3)=S
END
C
C
C#######################################################################
C
C
SUBROUTINE QSWAP3(N,A)
C ======================
C
C==== Swap bytes N/N+3 and N+1/N+2 for N = 0,4,8...
C
IMPLICIT NONE
INTEGER I,N
BYTE A(N),S
DO 10 I=1,N,4
S=A(I)
A(I)=A(I+3)
A(I+3)=S
S=A(I+1)
A(I+1)=A(I+2)
10 A(I+2)=S
END
C
C
C#######################################################################
C
C
SUBROUTINE QFIEEE(N,A)
C ======================
C
C==== Convert from IEEE to VAX native, assuming IEEE byte order.
C==== NaN (not a number) becomes ROP (reserved operand).
C
IMPLICIT NONE
INTEGER IEXP,MANT,MDN1,MDN2,MEXP,MNAN,ROP
PARAMETER (IEXP='01000000'X,MANT='003FFFFF'X,MDN1='00400000'X,
& MDN2='00200000'X,MEXP='7E800000'X,MNAN='7F800000'X,
& ROP='80000000'X)
INTEGER E,I,N
INTEGER A(N)
C
DO 10 I=1,N
E=A(I).AND.MNAN
IF (E.GT.0) THEN
IF (E.LE.MEXP) THEN
A(I)=A(I)+IEXP
ELSEIF (E.LT.MNAN) THEN
A(I)=ROP
ELSE
A(I)=ROP.OR.(A(I).AND..NOT.MNAN)
ENDIF
ELSEIF ((A(I).AND.MDN1).NE.0) THEN
A(I)=(A(I).AND.ROP).OR.2*(A(I).AND.MANT).OR.IEXP
ELSEIF ((A(I).AND.MDN2).NE.0) THEN
A(I)=(A(I).AND.ROP).OR.4*(A(I).AND.MANT)
ELSE
A(I)=0
ENDIF
10 CONTINUE
END
C
C
C#######################################################################
C
C
SUBROUTINE QTIEEE(N,A)
C ======================
C
C==== Convert to IEEE from VAX/Convex native, assuming IEEE byte order.
C==== ROP (reserved operand) becomes NaN (not a number).
C
IMPLICIT NONE
INTEGER IEXP,MDN1,MDN2,MNAN
PARAMETER (IEXP='01000000'X,MDN1='00400000'X,MDN2='00200000'X,
& MNAN='7F800000'X)
INTEGER E,I,N
INTEGER A(N)
C
DO 10 I=1,N
E=A(I).AND.MNAN
IF (E.GT.IEXP) THEN
A(I)=A(I)-IEXP
ELSEIF (E.EQ.0) THEN
IF (A(I).LT.0) THEN
A(I)=A(I).OR.MNAN
ELSE
A(I)=0
ENDIF
ELSE
IF (E.EQ.IEXP) THEN
A(I)=(A(I)/2.AND..NOT.MNAN).OR.MDN1
ELSE
A(I)=((A(I)+SIGN(2,A(I)))/4.AND..NOT.MNAN).OR.MDN2
ENDIF
ENDIF
10 CONTINUE
END
C
C
C#######################################################################
C
C
SUBROUTINE QRARCH(IUNIT,IEL,IRET)
C =================================
C==== Read machine integer/real type from file.
IMPLICIT NONE
INTEGER I,IUNIT,IEL,IRET
CHARACTER MSG*16
BYTE MS(4)
C
CALL UGTENV('CCP4_NATIVE',MSG)
IF (MSG.NE.' ') THEN
IRET=0
ELSE
CALL QMODE(IUNIT,0,IRET)
CALL QSEEK(IUNIT,1,4*IEL+1,0)
CALL QREAD(IUNIT,MS,2,IRET)
IF (IRET.NE.0) CALL CCPERR(1,'*** FATAL ERROR IN QRARCH ***')
C WRITE(6,*)'MS =',MS(1),MS(2)
CALL QSETMS(IUNIT,MS,IRET)
ENDIF
END
C
C
C#######################################################################
C
C
SUBROUTINE QWARCH(IUNIT,IEL)
C ============================
C==== Write machine integer/real type to file.
IMPLICIT NONE
INTEGER IUNIT,IEL,IRET,MTIT,MTRT
BYTE MS(4)
DATA MS/4*0/
C
CALL QIRTYP(MTIT,MTRT)
C WRITE (6,*) 'MTIT, MTRT =',MTIT,MTRT
MS(1)=17*MTRT
MS(2)=16*MTIT+1
CALL QMODE(IUNIT,0,IRET)
CALL QSEEK(IUNIT,1,4*IEL+1,0)
CALL QWRITE(IUNIT,MS,4)
END
C
C
C#######################################################################
C
C
SUBROUTINE QNAN(VALUE)
C==== Get undefined number value.
IMPLICIT NONE
INTEGER NAN,ROPC,ROPV
PARAMETER (NAN='FFFA5A5A'X,ROPC='80000000'X,ROPV='8000'X)
INTEGER INAN,MTIT,MTRT
REAL RNAN, VALUE
EQUIVALENCE(INAN,RNAN)
C
CALL QIRTYP(MTIT,MTRT)
IF (MTRT.EQ.1 .OR. MTRT.EQ.4) THEN
INAN=NAN
ELSEIF (MTRT.EQ.5) THEN
INAN=ROPC
ELSEIF (MTRT.EQ.2) THEN
INAN=ROPV
ELSE
CALL CCPERR(1,'*** FATAL: QNAN machine type undefined.')
ENDIF
VALUE=RNAN
END
C
C
C#######################################################################
C
C
LOGICAL FUNCTION QISNAN(A)
C==== Test undefined number value.
IMPLICIT NONE
INTEGER MNAN,MROPC,MROPV,ROPC,ROPV
PARAMETER (MNAN='7F800000'X,MROPC='FF800000'X,MROPV='FF80'X,
& ROPC='80000000'X,ROPV='8000'X)
INTEGER N,MTIT,MTRT
REAL A,R
EQUIVALENCE(N,R)
C
R=A
CALL QIRTYP(MTIT,MTRT)
IF (MTRT.EQ.2) THEN
QISNAN=(N.AND.MROPV).EQ.ROPV
ELSEIF (MTRT.EQ.5) THEN
QISNAN=(N.AND.MROPC).EQ.ROPC
ELSE IF (MTRT.EQ.1 .OR. MTRT.EQ.4) THEN
QISNAN=(N.AND.MNAN).EQ.MNAN
ELSE
CALL CCPERR(1,'*** FATAL: QISNAN machine type undefined.')
ENDIF
END
C
C
C#######################################################################
C
C
SUBROUTINE CCPBML (N, A)
C Reset BIOMOL absence flags to zero in N elements of array A,
C testing for Rops. (We rely on the default optimisation to inline
C the QISNAN, which otherwise will be called for each number in the
C MTZ file.)
INTEGER N, I
REAL A (*)
LOGICAL QISNAN
EXTERNAL QISNAN
DO I=1,N
IF (.NOT.QISNAN (A(I))) THEN
IF (A(I).LE.-0.99E10) A(I) = 0.0
ENDIF
ENDDO
END
C
C
C#######################################################################
C
C
SUBROUTINE CCPWRG (N, A, WRANGE)
C This a an Rop-safe routine to update the column ranges needed by
C mtzlib
INTEGER I, N
REAL A (*), WRANGE (2,N,*)
LOGICAL QISNAN
EXTERNAL QISNAN
DO I=1,N
IF (.NOT.QISNAN (A(I))) THEN
IF (A(I).NE.-1E-10) THEN
IF (A(I).LT.WRANGE(1,I,1)) WRANGE(1,I,1) = A(I)
IF (A(I).GT.WRANGE(2,I,1)) WRANGE(2,I,1) = A(I)
ENDIF
ENDIF
ENDDO
END
C
C
C#######################################################################
C Reading and writing CHARACTER BUFFER, len(buffer) bytes, mode 0.
C (It may be possible to declare BUFFER as a structure and get the
C data address directly, without calling STR$ANALYZE_SDESC.)
SUBROUTINE QREADC (IUNIT,BUFFER,RESULT)
PARAMETER (NCMAX=10)
INTEGER IUNIT, NITEMS, RESULT, MODE, OLDMODE, NMODE(NCMAX), MITEM
CHARACTER BUFFER*(*)
COMMON /DISKIO_MODES_/ MAXNC, NMODE
IF (IUNIT.GT.MAXNC .OR. IUNIT.LT.1)
+ CALL CCPERR (1, 'QREADC: Bad unit number')
C save the old mode and change to bytes
OLDMODE = NMODE (IUNIT)
CALL QMODE (IUNIT,0,MITEM)
CALL STR$ANALYZE_SDESC (BUFFER, NITEMS, IPTR)
CALL QREAD (IUNIT,%VAL(IPTR),NITEMS,RESULT)
C restore mode
CALL QMODE (IUNIT,OLDMODE,MITEM)
END
SUBROUTINE QWRITC (IUNIT,BUFFER,RESULT)
PARAMETER (NCMAX=10)
INTEGER IUNIT, NITEMS, RESULT, MODE, OLDMODE, NMODE(NCMAX), MITEM
CHARACTER BUFFER*(*)
COMMON /DISKIO_MODES_/ MAXNC, NMODE
IF (IUNIT.GT.MAXNC .OR. IUNIT.LT.1)
+ CALL CCPERR (1, 'QREADC: Bad unit number')
C save the old mode and change to bytes
OLDMODE = NMODE (IUNIT)
CALL QMODE (IUNIT,0,MITEM)
CALL STR$ANALYZE_SDESC (BUFFER, NITEMS, IPTR)
CALL QWRITE (IUNIT,%VAL(IPTR),NITEMS,RESULT)
C restore mode
CALL QMODE (IUNIT,OLDMODE,MITEM)
END
SUBROUTINE CUNLINK (FILE)
C Dummy version -- can't unlink VMS files
CHARACTER *(*) FILE
END
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