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46 lines
1.0 KiB
46 lines
1.0 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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subroutine hunt(a,n,x,jlo)
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C ... find jlo such that a(jlo) .le. x .and. a(jlo+1) .gt. x
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C (if jlo .ne. n)
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C Start search at passed in 'jlo' position
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DIMENSION a(n)
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integer jlo, low, high
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if (jlo .lt. 1 .or. jlo .gt. n) jlo = 1
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if (a(jlo) .eq. x) then
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return
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else if (a(1) .ge. x) then
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jlo = 1
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return
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else if (a(n) .lt. x) then
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jlo = n
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return
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end if
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if (a(jlo) .le. x) then
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low = jlo
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high = n-1
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else
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low = 1
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high = jlo
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end if
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do jlo = low, high
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if (a(jlo) .le. x .and. a(jlo+1) .ge. x) then
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return
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end if
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end do
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C ... should not get here since extremes checked above...
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end
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