private static boolean isValidPathSegment(CanonicalTreeParser t) {
boolean isWindows = SystemReader.getInstance().isWindows();
boolean isOSX = SystemReader.getInstance().isMacOS();
boolean ignCase = isOSX || isWindows;
int ptr = t.getNameOffset();
byte[] raw = t.getEntryPathBuffer();
int end = ptr + t.getNameLength();
// Validate path component at this level of the tree
int start = ptr;
while (ptr < end) {
if (raw[ptr] == '/') return false;
if (isWindows) {
if (raw[ptr] == '\\') return false;
if (raw[ptr] == ':') return false;
}
ptr++;
}
// '.' and '.'' are invalid here
if (ptr - start == 1) {
if (raw[start] == '.') return false;
} else if (ptr - start == 2) {
if (raw[start] == '.') if (raw[start + 1] == '.') return false;
} else if (ptr - start == 4) {
// .git (possibly case insensitive) is disallowed
if (raw[start] == '.')
if (raw[start + 1] == 'g' || (ignCase && raw[start + 1] == 'G'))
if (raw[start + 2] == 'i' || (ignCase && raw[start + 2] == 'I'))
if (raw[start + 3] == 't' || (ignCase && raw[start + 3] == 'T')) return false;
}
if (isWindows) {
// Space or period at end of file name is ignored by Windows.
// Treat this as a bad path for now. We may want to handle
// this as case insensitivity in the future.
if (raw[ptr - 1] == '.' || raw[ptr - 1] == ' ') return false;
int i;
// Bad names, eliminate suffix first
for (i = start; i < ptr; ++i) if (raw[i] == '.') break;
int len = i - start;
if (len == 3 || len == 4) {
for (int j = 0; j < forbidden.length; ++j) {
if (forbidden[j].length == len) {
if (toUpper(raw[start]) < forbidden[j][0]) break;
int k;
for (k = 0; k < len; ++k) {
if (toUpper(raw[start + k]) != forbidden[j][k]) break;
}
if (k == len) return false;
}
}
}
}
return true;
}
