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70 lines
2.3 KiB
70 lines
2.3 KiB
2 years ago
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C Copyright(C) 1999-2020 National Technology & Engineering Solutions
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C of Sandia, LLC (NTESS). Under the terms of Contract DE-NA0003525 with
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C NTESS, the U.S. Government retains certain rights in this software.
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C
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C See packages/seacas/LICENSE for details
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C=======================================================================
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SUBROUTINE ENGSTR (NNUM, NSIG, RNUM, RSTR, LSTR)
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C=======================================================================
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C --*** ENGSTR *** (STRLIB) Convert real numbers to strings
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C -- Written by Amy Gilkey - revised 02/14/86
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C --
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C --ENGSTR converts a set of real numbers into engineering notation
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C --strings. The real numbers are not compared in any way to get a
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C --consistent set of exponents, etc.
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C --
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C --Parameters:
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C -- NNUM - IN - the number of numbers in the array set
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C -- NSIG - IN - the maximum number of significant digits, max of 8
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C -- RNUM - IN - the array of real numbers to be converted
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C -- RSTR - OUT - the set of real number strings
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C -- LSTR - OUT - the maximum length of the number strings
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C --Routines Called:
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C -- IENGRX - (included) Get engineering notation exponent
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INTEGER NNUM
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INTEGER NSIG
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REAL RNUM(*)
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CHARACTER*(*) RSTR(*)
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INTEGER LSTR
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CHARACTER*10 SCRFMT
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CHARACTER*20 SCRSTR
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CHARACTER*15 FFMT
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C --Do not try to use a common exponent, but use engineering notation
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WRITE (SCRFMT, 10, IOSTAT=IDUM) NSIG+7, NSIG
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10 FORMAT ('(0PE', I2.2, '.', I2.2, ')')
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LSTR = 0
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DO 40 I = 1, NNUM
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WRITE (SCRSTR(1:NSIG+7), SCRFMT, IOSTAT=IDUM) RNUM(I)
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READ (SCRSTR(NSIG+5:NSIG+7), '(I3)', IOSTAT=IDUM) IE
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ISIGN = 0
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IF (RNUM(I) .LT. 0.0) ISIGN = 1
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NEWEXP = IENGRX (IE, IE)
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EXPDIV = 10.0 ** NEWEXP
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NWHOLE = MAX (0, IE - NEWEXP)
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NFRAC = MAX (0, MIN (NEWEXP - IE + NSIG,
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& NSIG - (IE - NEWEXP)))
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NTOTAL = ISIGN + NWHOLE + 1 + NFRAC
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WRITE (FFMT, 20, IOSTAT=IDUM) NTOTAL, NFRAC
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20 FORMAT ('(F', I2.2, '.', I2.2, ')')
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WRITE (FFMT(8:15), 30, IOSTAT=IDUM) NEWEXP
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30 FORMAT (',''E', SP, I3.2, ''')')
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LSTR = MAX (LSTR, NTOTAL+4)
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WRITE (RSTR(I), FFMT, IOSTAT=IDUM) RNUM(I)/EXPDIV
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40 CONTINUE
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RETURN
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END
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