mirror of https://github.com/ecmwf/eccodes.git
45 lines
1.6 KiB
Modula-2
45 lines
1.6 KiB
Modula-2
# (C) Copyright 2005- ECMWF.
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flags[1] scanningMode 'grib2/tables/[tablesVersion]/3.4.table' : edition_specific,no_copy ;
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# Note our flagbit numbers go from 7 to 0, while WMO convention is from 1 to 8
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flagbit iScansNegatively(scanningMode,7) : dump; # WMO bit 1
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flagbit jScansPositively(scanningMode,6) : dump; # WMO bit 2
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flagbit jPointsAreConsecutive(scanningMode,5) : dump;
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flagbit alternativeRowScanning(scanningMode,4) = 0 : edition_specific,dump;
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if (jPointsAreConsecutive) {
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alias numberOfRows=Ni;
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alias numberOfColumns=Nj;
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} else {
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alias numberOfRows=Nj;
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alias numberOfColumns=Ni;
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}
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alias geography.iScansNegatively=iScansNegatively;
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alias geography.jScansPositively=jScansPositively;
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alias geography.jPointsAreConsecutive=jPointsAreConsecutive;
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transient iScansPositively = !iScansNegatively : constraint, read_only;
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transient jScansNegatively = !jScansPositively : constraint, read_only;
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flagbit scanningMode5(scanningMode,3) = 0: read_only;
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flagbit scanningMode6(scanningMode,2) = 0: read_only;
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flagbit scanningMode7(scanningMode,1) = 0: read_only;
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flagbit scanningMode8(scanningMode,0) = 0: read_only;
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meta swapScanningX change_scanning_direction(
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values,Ni,Nj,
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iScansNegatively,jScansPositively,
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xFirst,xLast,x) : edition_specific,hidden,no_copy;
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alias swapScanningLon = swapScanningX;
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meta swapScanningY change_scanning_direction(
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values,Ni,Nj,
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iScansNegatively,jScansPositively,
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yFirst,yLast,y) : edition_specific,hidden,no_copy;
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alias swapScanningLat = swapScanningY;
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meta swapScanningAlternativeRows change_alternative_row_scanning(
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values, Ni, Nj, alternativeRowScanning): edition_specific,hidden,no_copy;
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