diff options
Diffstat (limited to 'indra/llcommon/llsdutil.cpp')
| -rw-r--r-- | indra/llcommon/llsdutil.cpp | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/indra/llcommon/llsdutil.cpp b/indra/llcommon/llsdutil.cpp index ec883130bd..d44387cc55 100644 --- a/indra/llcommon/llsdutil.cpp +++ b/indra/llcommon/llsdutil.cpp @@ -322,6 +322,180 @@ BOOL compare_llsd_with_template( return TRUE; } +// filter_llsd_with_template() is a direct clone (copy-n-paste) of +// compare_llsd_with_template with the following differences: +// (1) bool vs BOOL return types +// (2) A map with the key value "*" is a special value and maps any key in the +// test llsd that doesn't have an explicitly matching key in the template. +// (3) The element of an array with exactly one element is taken as a template +// for *all* the elements of the test array. If the template array is of +// different size, compare_llsd_with_template() semantics apply. +bool filter_llsd_with_template( + const LLSD & llsd_to_test, + const LLSD & template_llsd, + LLSD & resultant_llsd) +{ + if (llsd_to_test.isUndefined() && template_llsd.isDefined()) + { + resultant_llsd = template_llsd; + return true; + } + else if (llsd_to_test.type() != template_llsd.type()) + { + resultant_llsd = LLSD(); + return false; + } + + if (llsd_to_test.isArray()) + { + //they are both arrays + //we loop over all the items in the template + //verifying that the to_test has a subset (in the same order) + //any shortcoming in the testing_llsd are just taken + //to be the rest of the template + LLSD data; + LLSD::array_const_iterator test_iter; + LLSD::array_const_iterator template_iter; + + resultant_llsd = LLSD::emptyArray(); + test_iter = llsd_to_test.beginArray(); + + if (1 == template_llsd.size()) + { + // If the template has a single item, treat it as + // the template for *all* items in the test LLSD. + template_iter = template_llsd.beginArray(); + + for (; test_iter != llsd_to_test.endArray(); ++test_iter) + { + if (! filter_llsd_with_template(*test_iter, *template_iter, data)) + { + resultant_llsd = LLSD(); + return false; + } + else + { + resultant_llsd.append(data); + } + } + } + else + { + // Traditional compare_llsd_with_template matching + + for (template_iter = template_llsd.beginArray(); + template_iter != template_llsd.endArray() && + test_iter != llsd_to_test.endArray(); + ++template_iter, ++test_iter) + { + if (! filter_llsd_with_template(*test_iter, *template_iter, data)) + { + resultant_llsd = LLSD(); + return false; + } + else + { + resultant_llsd.append(data); + } + } + + //so either the test or the template ended + //we do another loop now to the end of the template + //grabbing the default values + for (; + template_iter != template_llsd.endArray(); + ++template_iter) + { + resultant_llsd.append(*template_iter); + } + } + } + else if (llsd_to_test.isMap()) + { + resultant_llsd = LLSD::emptyMap(); + + //now we loop over the keys of the two maps + //any excess is taken from the template + //excess is ignored in the test + + // Special tag for wildcarded LLSD map key templates + const LLSD::String wildcard_tag("*"); + + const bool template_has_wildcard = template_llsd.has(wildcard_tag); + LLSD wildcard_value; + LLSD value; + + const LLSD::map_const_iterator template_iter_end(template_llsd.endMap()); + for (LLSD::map_const_iterator template_iter(template_llsd.beginMap()); + template_iter_end != template_iter; + ++template_iter) + { + if (wildcard_tag == template_iter->first) + { + wildcard_value = template_iter->second; + } + else if (llsd_to_test.has(template_iter->first)) + { + //the test LLSD has the same key + if (! filter_llsd_with_template(llsd_to_test[template_iter->first], + template_iter->second, + value)) + { + resultant_llsd = LLSD(); + return false; + } + else + { + resultant_llsd[template_iter->first] = value; + } + } + else if (! template_has_wildcard) + { + // test llsd doesn't have it...take the + // template as default value + resultant_llsd[template_iter->first] = template_iter->second; + } + } + if (template_has_wildcard) + { + LLSD sub_value; + LLSD::map_const_iterator test_iter; + + for (test_iter = llsd_to_test.beginMap(); + test_iter != llsd_to_test.endMap(); + ++test_iter) + { + if (resultant_llsd.has(test_iter->first)) + { + // Final value has test key, assume more specific + // template matched and we shouldn't modify it again. + continue; + } + else if (! filter_llsd_with_template(test_iter->second, + wildcard_value, + sub_value)) + { + // Test value doesn't match wildcarded template + resultant_llsd = LLSD(); + return false; + } + else + { + // Test value matches template, add the actuals. + resultant_llsd[test_iter->first] = sub_value; + } + } + } + } + else + { + //of same type...take the test llsd's value + resultant_llsd = llsd_to_test; + } + + return true; +} + /***************************************************************************** * Helpers for llsd_matches() *****************************************************************************/ @@ -749,3 +923,104 @@ LLSD drill(const LLSD& blob, const LLSD& path) } } // namespace llsd + +// Construct a deep partial clone of of an LLSD object. primitive types share +// references, however maps, arrays and binary objects are duplicated. An optional +// filter may be include to exclude/include keys in a map. +LLSD llsd_clone(LLSD value, LLSD filter) +{ + LLSD clone; + bool has_filter(filter.isMap()); + + switch (value.type()) + { + case LLSD::TypeMap: + clone = LLSD::emptyMap(); + for (LLSD::map_const_iterator itm = value.beginMap(); itm != value.endMap(); ++itm) + { + if (has_filter) + { + if (filter.has((*itm).first)) + { + if (!filter[(*itm).first].asBoolean()) + continue; + } + else if (filter.has("*")) + { + if (!filter["*"].asBoolean()) + continue; + } + else + { + continue; + } + } + clone[(*itm).first] = llsd_clone((*itm).second, filter); + } + break; + case LLSD::TypeArray: + clone = LLSD::emptyArray(); + for (LLSD::array_const_iterator ita = value.beginArray(); ita != value.endArray(); ++ita) + { + clone.append(llsd_clone(*ita, filter)); + } + break; + + case LLSD::TypeBinary: + { + LLSD::Binary bin(value.asBinary().begin(), value.asBinary().end()); + clone = LLSD::Binary(bin); + break; + } + default: + clone = value; + } + + return clone; +} + +LLSD llsd_shallow(LLSD value, LLSD filter) +{ + LLSD shallow; + bool has_filter(filter.isMap()); + + if (value.isMap()) + { + shallow = LLSD::emptyMap(); + for (LLSD::map_const_iterator itm = value.beginMap(); itm != value.endMap(); ++itm) + { + if (has_filter) + { + if (filter.has((*itm).first)) + { + if (!filter[(*itm).first].asBoolean()) + continue; + } + else if (filter.has("*")) + { + if (!filter["*"].asBoolean()) + continue; + } + else + { + continue; + } + } + shallow[(*itm).first] = (*itm).second; + } + } + else if (value.isArray()) + { + shallow = LLSD::emptyArray(); + for (LLSD::array_const_iterator ita = value.beginArray(); ita != value.endArray(); ++ita) + { + shallow.append(*ita); + } + } + else + { + return value; + } + + return shallow; +} |