/**
* Checks that the given string is a valid unqualified name.
*
* @param version the class version.
* @param name the string to be checked.
* @param msg a message to be used in case of error.
*/
static void checkUnqualifiedName(int version, final String name, final String msg) {
if ((version & 0xFFFF) < Opcodes.V1_5) {
checkIdentifier(name, msg);
} else {
for (int i = 0; i < name.length(); ++i) {
if (".;[/".indexOf(name.charAt(i)) != -1) {
throw new IllegalArgumentException(
"Invalid " + msg + " (must be a valid unqualified name): " + name);
}
}
}
}
/**
* Checks that the given substring is a valid internal class name.
*
* @param name the string to be checked.
* @param start index of the first character of the identifier (inclusive).
* @param end index of the last character of the identifier (exclusive). -1 is equivalent to
* <tt>name.length()</tt> if name is not <tt>null</tt>.
* @param msg a message to be used in case of error.
*/
static void checkInternalName(
final String name, final int start, final int end, final String msg) {
int max = end == -1 ? name.length() : end;
try {
int begin = start;
int slash;
do {
slash = name.indexOf('/', begin + 1);
if (slash == -1 || slash > max) {
slash = max;
}
checkIdentifier(name, begin, slash, null);
begin = slash + 1;
} while (slash != max);
} catch (IllegalArgumentException unused) {
throw new IllegalArgumentException(
"Invalid " + msg + " (must be a fully qualified class name in internal form): " + name);
}
}
/**
* Checks that the given string is a valid Java identifier.
*
* @param name the string to be checked.
* @param msg a message to be used in case of error.
*/
static void checkIdentifier(final String name, final String msg) {
checkIdentifier(name, 0, -1, msg);
}