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herinp - decode string into reals, integers, logicals, characters or bytes


          arg.   I/O type  description
          EXPR    I  A**   Byte array containing the expressions to
                           evaluate. Last byte should be a 0.
      NCHR    I  I*4   length of input expression string
          TYPE    I  A*1   Byte denoting type of conversion wanted.
                           Possible types are: ’F’   reals
                                               ’I’   integers
                                               ’L’   logicals
                                               ’A’   bytes
                                               ’C’   characters
          LENGTH  I  I*4   Length of type in bytes. Possible lengths
                           depend on type:
                                   TYPE       LENGTH
                                    ’F’         4,8
                                    ’I’         2,4
                                    ’L’         1,2,4
                                    ’A’         any
                                    ’C’         any
          OUTV    O  A**   Array containing the decoded values.
          NOUT    I  I*4   Length of OUTV in units of LENGTH.
          NRET    O  I*4   Number of items found.
          IERD    O  I*4   Error return code. The following error codes
                           can be returned:
                           IER   explanation
                             0   no error
                           -11   bad call
                           -12   unknown function
                           -13   syntax error
                           -14   illegal character
                           -15   wrong repeat argument
                           -16   wrong number of arguments
                           -17   arithmetic error
                           -18   not enough internal memory
                           -19   conversion error
                           -20   unequal list length
                           -21   empty list
                           -22   nested lists
                           -23   output buffer overflow
                           -24   floating overflow/underflow in conversion


   - Reals or Integers (TYPE = ’F’ or ’I’).
Reals or Integers can be typed as numbers and/or as expressions.
The numbers/expressions can be typed on one line, separated by
blanks and/or a comma. There is a loop-facility implemented, which
has the format s:e[:i], where s = startvalue, e = endvalue and
i = incrementvalue (default: 1), and a repeat-facility, which
has the format v::n, where v = value to be repeated and n
the repeat-count of v. There is also a list-facility, which is
a string of numbers/expressions enclosed between [square brackets].
A list is treated in expressions as a kind of array. The expression
is evaluated for each list element (from left to right) separately.

          Examples: 1 2 3/3  sin(pi)      yields       1.0 2.0 1.0 0.0
                    log(10)::4            yields       1.0 1.0 1.0 1.0
                    log(10):log(100):2/4  yields       1.0 1.5 2.0
                    10**[0 1 2 3]         yields       1.0 10.0 100.0 1000.0
          Notes:    loops, repeats and lists cannot be nested!!

- Logicals (TYPE = ’L’).
Logicals are decoded in the following way: YES, JA and TRUE result
in a logical which is true, NO, NEE and FALSE give a logical which
is false. It is sufficient to give the first letter of the possible
affirmative and negative replies. Any other answer will result in
a syntax error.

- Bytes (TYPE = ’A’).
Bytes are not decoded, they are just passed through. The end of
the output string is denoted by a zero byte.

- Characters (TYPE = ’C’).
The character strings are separated by blanks and/or a comma.
If a character string exceeds the value of LENGTH, an error
message will be generated.


Functions and constants can be referenced in uppercase also.

sin(x), asin(x), sinh(x), cos(x), acos(x), cosh(x), tan(x), atan(x), tanh(x), atan2(y,x), rad(x), deg(x), pi, exp(x), ln(x), log(x), sqrt(x), abs(x), sinc(x), c, g, m, erf(x), erfc(x), k, h, p, s, max(x1,x2), min(x1,x2), mod(i,n), int(x), nint(x), sign(x), undef, ifgt(x,y,zf,zf) iflt(x,y,zf,zf), ifge(x,y,zf,zf), ifle(x,y,zf,zf), ifeq(x,y,zf,zf), ifne(x,y,zf,zf), ranu(x,y), rang(x,y), ranp(x), sind(x), asind(x), cosd(x), acosd(x), tand(x), atand(x), atand2(y,x)

Constants are in mks units!! c=speed of light, g=gravitational constant, m=solar mass, k=boltzmann’s constant, h=planck’s constant, p= ,s=.


K. G. Begeman

Update History

xx/xxx/xx    Created for GIPSY - (c) University of Groningen - Netherlands
16/dec/87    Type C implemented (KGB)
25/jan/88    Document created (KGB)
26/feb/88    In GENLIB (KGB)
18-may-88    Implemented for NEMO (PJT)
25-nov-88    Some global variables are now local (PJT)
6-dec-88    New version (V1.1) from Groningen installed (PJT)
5-dec-93    Allow DO loops to go > 32768 (PJT)
3-nov-01    use NEMO’s xrandom() instead of rand()    PJT

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