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WIP - Not working in pyarrow

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wiredfool 2025-07-19 17:34:39 +02:00
parent 85212dbbb6
commit 64556405e2
1 changed files with 38 additions and 1 deletions
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39
src/libImaging/Arrow.c
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@ -84,6 +84,33 @@ image_band_json(Imaging im) {
return json;
}
char *
single_band_json(Imaging im) {
char *format = "{\"bands\": [\"%s\"]}";
char *json;
// Bands can be 1 band * (maybe but probably not) 2 characters each
int len = strlen(format) + 2 + 1;
int err;
json = calloc(1, len);
if (!json) {
return NULL;
}
err = PyOS_snprintf(
json,
len,
format,
im->band_names[0]
);
if (err < 0) {
return NULL;
}
return json;
}
char *
assemble_metadata(const char *band_json) {
/* format is
@ -179,7 +206,17 @@ export_imaging_schema(Imaging im, struct ArrowSchema *schema) {
}
if (im->bands == 1) {
return export_named_type(schema, im->arrow_band_format, im->band_names[0]);
retval = export_named_type(schema, im->arrow_band_format, im->band_names[0]);
if (retval != 0) {
return retval;
}
// band related metadata
band_json = single_band_json(im);
if (band_json) {
schema->metadata = assemble_metadata(band_json);
free(band_json);
}
return retval;
}
retval = export_named_type(schema, "+w:4", "");