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// Copyright 2021 Code Intelligence GmbH
//
// 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.
package com.code_intelligence.jazzer.instrumentor
internal fun isPrimitiveType(typeDescriptor: String): Boolean {
return typeDescriptor in arrayOf("B", "C", "D", "F", "I", "J", "S", "V", "Z")
}
private fun isPrimitiveType(typeDescriptor: Char) = isPrimitiveType(typeDescriptor.toString())
internal fun getWrapperTypeDescriptor(typeDescriptor: String): String = when (typeDescriptor) {
"B" -> "Ljava/lang/Byte;"
"C" -> "Ljava/lang/Character;"
"D" -> "Ljava/lang/Double;"
"F" -> "Ljava/lang/Float;"
"I" -> "Ljava/lang/Integer;"
"J" -> "Ljava/lang/Long;"
"S" -> "Ljava/lang/Short;"
"V" -> "Ljava/lang/Void;"
"Z" -> "Ljava/lang/Boolean;"
else -> typeDescriptor
}
// Removes the 'L' and ';' prefix/suffix from signatures to get the full class name.
// Note that array signatures '[Ljava/lang/String;' already have the correct form.
internal fun extractInternalClassName(typeDescriptor: String): String {
return if (typeDescriptor.startsWith("L") && typeDescriptor.endsWith(";")) {
typeDescriptor.substring(1, typeDescriptor.length - 1)
} else {
typeDescriptor
}
}
internal fun extractParameterTypeDescriptors(methodDescriptor: String): List<String> {
require(methodDescriptor.startsWith('(')) { "Method descriptor must start with '('" }
val endOfParameterPart = methodDescriptor.indexOf(')') - 1
require(endOfParameterPart >= 0) { "Method descriptor must contain ')'" }
var remainingDescriptorList = methodDescriptor.substring(1..endOfParameterPart)
val parameterDescriptors = mutableListOf<String>()
while (remainingDescriptorList.isNotEmpty()) {
val nextDescriptor = extractNextTypeDescriptor(remainingDescriptorList)
parameterDescriptors.add(nextDescriptor)
remainingDescriptorList = remainingDescriptorList.removePrefix(nextDescriptor)
}
return parameterDescriptors
}
internal fun extractReturnTypeDescriptor(methodDescriptor: String): String {
require(methodDescriptor.startsWith('(')) { "Method descriptor must start with '('" }
val endBracketPos = methodDescriptor.indexOf(')')
require(endBracketPos >= 0) { "Method descriptor must contain ')'" }
val startOfReturnValue = endBracketPos + 1
return extractNextTypeDescriptor(methodDescriptor.substring(startOfReturnValue))
}
private fun extractNextTypeDescriptor(input: String): String {
require(input.isNotEmpty()) { "Type descriptor must not be empty" }
// Skip over arbitrarily many '[' to support multi-dimensional arrays.
val firstNonArrayPrefixCharPos = input.indexOfFirst { it != '[' }
require(firstNonArrayPrefixCharPos >= 0) { "Array descriptor must contain type" }
val firstTypeChar = input[firstNonArrayPrefixCharPos]
return when {
// Primitive type
isPrimitiveType(firstTypeChar) -> {
input.substring(0..firstNonArrayPrefixCharPos)
}
// Object type
firstTypeChar == 'L' -> {
val endOfClassNamePos = input.indexOf(';')
require(endOfClassNamePos > 0) { "Class type indicated by L must end with ;" }
input.substring(0..endOfClassNamePos)
}
// Invalid type
else -> {
throw IllegalArgumentException("Invalid type: $firstTypeChar")
}
}
}
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