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lib/vector: Reject out of range categories when reading ASCII - #7844
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Vect_read_ascii() passed the layer and category straight to Vect_cat_set(), whose own range check is commented out, so a value outside the documented 1 - GV_CAT_MAX range was stored and only caused trouble later. A point carrying a negative category was skipped by v.out.ogr without -c and exported twice with it. Reject the feature at import instead. Category 0 stays allowed, since OGR layers use it. Fixes OSGeo#6563
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Vect_read_ascii() passed the layer and category straight to Vect_cat_set(), whose own range check is commented out, so a value outside the documented 1 - GV_CAT_MAX range was stored and only caused trouble later. A point carrying a negative category was skipped by v.out.ogr without -c and exported twice with it. Reject the feature at import instead. Category 0 stays allowed, since OGR layers use it. Fixes #6563
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Fixes #6563.
Vect_read_ascii()passed the layer and category it parsed straight toVect_cat_set(). That function's own range check is commented out — deliberately, with a note about the portable type length — so a value outside the documented1 - GV_CAT_MAXrange was accepted and stored, and only caused trouble much later.That is what the issue reports: a point carrying
-2147483647was skipped byv.out.ogrwithout-c, and exported twice with it.@metzm's comment on the issue identified the real cause — negative categories should not have been accepted in the first place — so this rejects the feature at import rather than trying to make the export cope with it.
Category 0 stays allowed, since OGR layers use it (per "Categories and Layers" in the Programmer's Manual). Layer numbers start at 1, so 0 is rejected.
Reproducing it
Before: imports silently,
v.category ... option=printshows-2147483647.After:
WARNING: Layer number or category number out of range: [1 -2147483647]and the import fails.Tests
vector/v.in.ascii/tests/v_in_ascii_categories_test.pycovers the negative category and layer 0 being rejected, plus ordinary categories and category 0 still importing. Checked against the unfixed build, where the two rejection tests fail withDID NOT RAISE CalledModuleErrorand the two happy-path tests pass either way.clang-formatandruffreport no changes.I used an AI assistant while preparing this. I understand the change and can explain it.