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module decoop_m |
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implicit none |
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|
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contains |
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SUBROUTINE decoop (pstr, nbops_max, missing_val, opps, scal, nbops) |
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|
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USE errioipsl, ONLY : histerr |
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use findsep_m, only: findsep |
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|
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CHARACTER(LEN=80) :: pstr |
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INTEGER :: nbops_max, nbops |
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CHARACTER(LEN=7) :: opps(nbops_max) |
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REAL :: scal(nbops_max), missing_val |
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|
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CHARACTER(LEN=1) :: f_char(2), s_char(2) |
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INTEGER :: nbsep, f_pos(2), s_pos(2) |
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CHARACTER(LEN=20) :: opp_str, scal_str |
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CHARACTER(LEN=80) :: str |
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INTEGER :: xpos, leng, ppos, epos, int_tmp |
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CHARACTER(LEN=3) :: tl, dl |
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CHARACTER(LEN=10) :: fmt |
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|
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LOGICAL :: check = .FALSE., prio |
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CHARACTER(LEN=80), SAVE :: ops = '+ - * / ^' |
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CHARACTER(LEN=80), SAVE :: mima = 'min max' |
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CHARACTER(LEN=250), SAVE :: funcs = & |
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'sin cos tan asin acos atan exp log sqrt chs abs ' & |
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//'cels kelv deg rad gather scatter fill coll undef only ident' |
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|
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!--------------------------------------------------------------------- |
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|
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IF (check) WRITE(*, '(2a)') ' decoop : Incoming string : ', pstr |
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|
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nbops = 0 |
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str = pstr |
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|
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CALL findsep (str, nbsep, f_char, f_pos, s_char, s_pos) |
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IF (check) WRITE(*, *) 'decoop : Out of findsep', nbsep |
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DO WHILE (nbsep > 0) |
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xpos = INDEX(str, 'X') |
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leng = LEN_TRIM(str) |
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nbops = nbops+1 |
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!-- |
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IF (check) THEN |
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WRITE(*, *) 'decoop : str -->', str(1:leng) |
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WRITE(*, *) s_char(1), '-', f_char(1), '|', f_char(2), '-', s_char(2) |
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WRITE(*, *) s_pos(1), '-', f_pos(1), '|', f_pos(2), '-', s_pos(2) |
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ENDIF |
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!-- |
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IF (nbops > nbops_max-1) THEN |
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CALL histerr(3, 'decoop', 'Expression too complex', str, ' ') |
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ENDIF |
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!-- |
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IF (check) WRITE(*, *) 'decoop : --', nbops, ' ', str(1:leng) |
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!--- |
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!-- Start the analysis of the syntax. 3 types of constructs |
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!-- are recognized. They are scanned sequentialy |
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!--- |
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IF (nbsep == 1) THEN |
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IF (check) WRITE(*, *) 'decoop : Only one operation' |
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IF (INDEX(ops, f_char(1)) > 0) THEN |
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!------ Type : scal+X |
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IF (f_char(1) == '-' .OR. f_char(1) == '/') THEN |
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opp_str = f_char(1)//'I' |
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ELSE |
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opp_str = f_char(1) |
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ENDIF |
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scal_str = str(s_pos(1)+1:f_pos(1)-1) |
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str = 'X' |
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ELSE IF (INDEX(ops, f_char(2)) > 0) THEN |
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!------ Type : X+scal |
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opp_str = f_char(2) |
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scal_str = str(f_pos(2)+1:s_pos(2)-1) |
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str = 'X' |
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ELSE |
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CALL histerr(3, 'decoop', & |
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'Unknown operations of type X+scal', f_char(1), pstr) |
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ENDIF |
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ELSE |
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IF (check) WRITE(*, *) 'decoop : More complex operation' |
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IF ( f_char(1) == '(' .AND. f_char(2) == ')' ) THEN |
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!------ Type : sin(X) |
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opp_str = str(s_pos(1)+1:f_pos(1)-1) |
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scal_str = '?' |
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str = str(1:s_pos(1))//'X'//str(f_pos(2)+1:leng) |
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ELSE IF ( (f_char(1) == '(' .AND. f_char(2) == ', ')& |
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.OR.(f_char(1) == ', ' .AND. f_char(2) == ')')) THEN |
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!------ Type : max(X, scal) or max(scal, X) |
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IF (f_char(1) == '(' .AND. s_char(2) == ')') THEN |
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!-------- Type : max(X, scal) |
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opp_str = str(f_pos(1)-3:f_pos(1)-1) |
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scal_str = str(f_pos(2)+1:s_pos(2)-1) |
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str = str(1:f_pos(1)-4)//'X'//str(s_pos(2)+1:leng) |
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ELSE IF (f_char(1) == ', ' .AND. s_char(1) == '(') THEN |
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!-------- Type : max(scal, X) |
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opp_str = str(s_pos(1)-3:s_pos(1)-1) |
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scal_str = str(s_pos(1)+1:f_pos(1)-1) |
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str = str(1:s_pos(1)-4)//'X'//str(f_pos(2)+1:leng) |
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ELSE |
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CALL histerr(3, 'decoop', 'Syntax error 1', str, ' ') |
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ENDIF |
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ELSE |
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prio = (f_char(2) == '*').OR.(f_char(2) == '^') |
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IF ( (INDEX(ops, f_char(1)) > 0) & |
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.AND.(xpos-f_pos(1) == 1).AND.(.NOT.prio) ) THEN |
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!-------- Type : ... scal+X ... |
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IF (f_char(1) == '-' .OR. f_char(1) == '/') THEN |
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opp_str = f_char(1)//'I' |
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ELSE |
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opp_str = f_char(1) |
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ENDIF |
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scal_str = str(s_pos(1)+1:f_pos(1)-1) |
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str = str(1:s_pos(1))//'X'//str(f_pos(1)+2:leng) |
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ELSE IF ( (INDEX(ops, f_char(2)) > 0) & |
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.AND.(f_pos(2)-xpos == 1) ) THEN |
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!-------- Type : ... X+scal ... |
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opp_str = f_char(2) |
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scal_str = str(f_pos(2)+1:s_pos(2)-1) |
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str = str(1:f_pos(2)-2)//'X'//str(s_pos(2):leng) |
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ELSE |
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CALL histerr(3, 'decoop', 'Syntax error 2', str, ' ') |
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ENDIF |
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ENDIF |
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ENDIF |
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!--- |
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IF (check) WRITE(*, *) 'decoop : Finished syntax, str = ', TRIM(str) |
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!--- |
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!-- Now that the different components of the operation are identified |
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!-- we transform them into what is going to be used in the program |
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!--- |
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IF (INDEX(scal_str, '?') > 0) THEN |
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IF (INDEX(funcs, opp_str(1:LEN_TRIM(opp_str))) > 0) THEN |
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opps(nbops) = opp_str(1:LEN_TRIM(opp_str)) |
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scal(nbops) = missing_val |
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ELSE |
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CALL histerr(3, 'decoop', & |
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'Unknown function', opp_str(1:LEN_TRIM(opp_str)), ' ') |
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ENDIF |
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ELSE |
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leng = LEN_TRIM(opp_str) |
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IF (INDEX(mima, opp_str(1:leng)) > 0) THEN |
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opps(nbops) = 'fu'//opp_str(1:leng) |
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ELSE |
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IF (INDEX(opp_str(1:leng), '+') > 0) THEN |
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opps(nbops) = 'add' |
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ELSE IF (INDEX(opp_str(1:leng), '-I') > 0) THEN |
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opps(nbops) = 'subi' |
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ELSE IF (INDEX(opp_str(1:leng), '-') > 0) THEN |
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opps(nbops) = 'sub' |
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ELSE IF (INDEX(opp_str(1:leng), '*') > 0) THEN |
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opps(nbops) = 'mult' |
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ELSE IF (INDEX(opp_str(1:leng), '/') > 0) THEN |
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opps(nbops) = 'div' |
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ELSE IF (INDEX(opp_str(1:leng), '/I') > 0) THEN |
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opps(nbops) = 'divi' |
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ELSE IF (INDEX(opp_str(1:leng), '^') > 0) THEN |
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opps(nbops) = 'power' |
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ELSE |
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CALL histerr(3, 'decoop', & |
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'Unknown operation', opp_str(1:leng), ' ') |
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ENDIF |
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ENDIF |
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!----- |
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leng = LEN_TRIM(scal_str) |
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ppos = INDEX(scal_str, '.') |
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epos = INDEX(scal_str, 'e') |
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IF (epos == 0) epos = INDEX(scal_str, 'E') |
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!----- |
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!---- Try to catch a few errors |
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!----- |
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IF (INDEX(ops, scal_str) > 0) THEN |
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CALL histerr(3, 'decoop', & |
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'Strange scalar you have here ', scal_str, pstr) |
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ENDIF |
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IF (epos > 0) THEN |
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WRITE(tl, '(I3.3)') leng |
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WRITE(dl, '(I3.3)') epos-ppos-1 |
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fmt='(e'//tl//'.'//dl//')' |
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READ(scal_str, fmt) scal(nbops) |
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ELSE IF (ppos > 0) THEN |
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WRITE(tl, '(I3.3)') leng |
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WRITE(dl, '(I3.3)') leng-ppos |
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fmt='(f'//tl//'.'//dl//')' |
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READ(scal_str, fmt) scal(nbops) |
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ELSE |
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WRITE(tl, '(I3.3)') leng |
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fmt = '(I'//tl//')' |
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READ(scal_str, fmt) int_tmp |
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scal(nbops) = REAL(int_tmp) |
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ENDIF |
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ENDIF |
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IF (check) WRITE(*, *) 'decoop : Finished interpretation' |
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CALL findsep(str, nbsep, f_char, f_pos, s_char, s_pos) |
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ENDDO |
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|
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END SUBROUTINE decoop |
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|
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end module decoop_m |
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