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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <androidfw/ResourceTypes.h>
#include <utils/String8.h>
#include "AaptXml.h"
using namespace android;
namespace AaptXml {
static String8 getStringAttributeAtIndex(const ResXMLTree& tree, ssize_t attrIndex,
String8* outError) {
Res_value value;
if (tree.getAttributeValue(attrIndex, &value) < 0) {
if (outError != NULL) {
*outError = "could not find attribute at index";
}
return String8();
}
if (value.dataType != Res_value::TYPE_STRING) {
if (outError != NULL) {
*outError = "attribute is not a string value";
}
return String8();
}
size_t len;
const char16_t* str = tree.getAttributeStringValue(attrIndex, &len);
return str ? String8(str, len) : String8();
}
static int32_t getIntegerAttributeAtIndex(const ResXMLTree& tree, ssize_t attrIndex,
int32_t defValue, String8* outError) {
Res_value value;
if (tree.getAttributeValue(attrIndex, &value) < 0) {
if (outError != NULL) {
*outError = "could not find attribute at index";
}
return defValue;
}
if (value.dataType < Res_value::TYPE_FIRST_INT
|| value.dataType > Res_value::TYPE_LAST_INT) {
if (outError != NULL) {
*outError = "attribute is not an integer value";
}
return defValue;
}
return value.data;
}
ssize_t indexOfAttribute(const ResXMLTree& tree, uint32_t attrRes) {
size_t attrCount = tree.getAttributeCount();
for (size_t i = 0; i < attrCount; i++) {
if (tree.getAttributeNameResID(i) == attrRes) {
return (ssize_t)i;
}
}
return -1;
}
String8 getAttribute(const ResXMLTree& tree, const char* ns,
const char* attr, String8* outError) {
ssize_t idx = tree.indexOfAttribute(ns, attr);
if (idx < 0) {
return String8();
}
return getStringAttributeAtIndex(tree, idx, outError);
}
String8 getAttribute(const ResXMLTree& tree, uint32_t attrRes, String8* outError) {
ssize_t idx = indexOfAttribute(tree, attrRes);
if (idx < 0) {
return String8();
}
return getStringAttributeAtIndex(tree, idx, outError);
}
String8 getResolvedAttribute(const ResTable& resTable, const ResXMLTree& tree,
uint32_t attrRes, String8* outError) {
ssize_t idx = indexOfAttribute(tree, attrRes);
if (idx < 0) {
return String8();
}
Res_value value;
if (tree.getAttributeValue(idx, &value) != NO_ERROR) {
if (value.dataType == Res_value::TYPE_STRING) {
size_t len;
const char16_t* str = tree.getAttributeStringValue(idx, &len);
return str ? String8(str, len) : String8();
}
resTable.resolveReference(&value, 0);
if (value.dataType != Res_value::TYPE_STRING) {
if (outError != NULL) {
*outError = "attribute is not a string value";
}
return String8();
}
}
size_t len;
const Res_value* value2 = &value;
const char16_t* str = resTable.valueToString(value2, 0, NULL, &len);
return str ? String8(str, len) : String8();
}
int32_t getIntegerAttribute(const ResXMLTree& tree, const char* ns,
const char* attr, int32_t defValue, String8* outError) {
ssize_t idx = tree.indexOfAttribute(ns, attr);
if (idx < 0) {
return defValue;
}
return getIntegerAttributeAtIndex(tree, idx, defValue, outError);
}
int32_t getIntegerAttribute(const ResXMLTree& tree, uint32_t attrRes, int32_t defValue,
String8* outError) {
ssize_t idx = indexOfAttribute(tree, attrRes);
if (idx < 0) {
return defValue;
}
return getIntegerAttributeAtIndex(tree, idx, defValue, outError);
}
int32_t getResolvedIntegerAttribute(const ResTable& resTable, const ResXMLTree& tree,
uint32_t attrRes, int32_t defValue, String8* outError) {
ssize_t idx = indexOfAttribute(tree, attrRes);
if (idx < 0) {
return defValue;
}
Res_value value;
if (tree.getAttributeValue(idx, &value) != NO_ERROR) {
if (value.dataType == Res_value::TYPE_REFERENCE) {
resTable.resolveReference(&value, 0);
}
if (value.dataType < Res_value::TYPE_FIRST_INT
|| value.dataType > Res_value::TYPE_LAST_INT) {
if (outError != NULL) {
*outError = "attribute is not an integer value";
}
return defValue;
}
}
return value.data;
}
void getResolvedResourceAttribute(const ResTable& resTable, const ResXMLTree& tree,
uint32_t attrRes, Res_value* outValue, String8* outError) {
ssize_t idx = indexOfAttribute(tree, attrRes);
if (idx < 0) {
if (outError != NULL) {
*outError = "attribute could not be found";
}
return;
}
if (tree.getAttributeValue(idx, outValue) != NO_ERROR) {
if (outValue->dataType == Res_value::TYPE_REFERENCE) {
resTable.resolveReference(outValue, 0);
}
// The attribute was found and was resolved if need be.
return;
}
if (outError != NULL) {
*outError = "error getting resolved resource attribute";
}
}
} // namespace AaptXml
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