static inline String::CPtr trimSeps(String::CPtr str) {
assert(str);
Size len = str->length();
if (!len) return str;
Size i = len - 1;
while (1) {
if (!isSep(str->charAt(i))) {
return str->substring(0, i + 1);
}
if (i) {
i--;
} else {
break;
}
}
return str->substring(0, 1);
}
String::CPtr dirname(String::CPtr path) {
LIBJ_STATIC_SYMBOL_DEF(symCurrent, ".");
if (!path) return symCurrent;
path = trimSeps(path);
String::CPtr base = basename(path);
Size baseLen = base->length();
Size pathLen = path->length();
if (baseLen == pathLen) {
return symCurrent;
} else {
Size sepPos = pathLen - baseLen - 1;
assert(isSep(path->charAt(sepPos)));
if (sepPos) {
return path->substring(0, sepPos);
} else {
return path->substring(0, 1);
}
}
}
String::CPtr extname(String::CPtr path) {
if (!path) return String::create();
String::CPtr base = basename(path);
if (base->charAt(0) == '.') return String::create();
Size lastIndex = base->lastIndexOf('.');
if (lastIndex == NO_POS) {
return String::create();
} else {
return base->substring(lastIndex);
}
}
String::CPtr basename(String::CPtr path) {
LIBJ_STATIC_SYMBOL_DEF(symNull, "null");
if (path) {
path = trimSeps(path);
} else {
return symNull;
}
Size lastIndex = lastIndexOfSep(path);
if (lastIndex == NO_POS) {
return path;
} else {
return path->substring(lastIndex + 1);
}
}
String::CPtr normalize(String::CPtr path) {
LIBJ_STATIC_SYMBOL_DEF(symCurrent, ".");
LIBJ_STATIC_SYMBOL_DEF(symParent, "..");
LIBJ_STATIC_SYMBOL_DEF(symNull, "null");
if (!path) return symNull;
Boolean absolute = false;
Boolean endsWithSep = false;
typedef TypedJsArray<String::CPtr> StringArray;
StringArray::Ptr dirs = StringArray::create();
Size len = path->length();
for (Size i = 0; i < len;) {
Size idx = indexOfSep(path, i);
if (idx == 0) {
absolute = true;
} else if (idx != i) {
String::CPtr dir;
if (idx == NO_POS) {
dir = path->substring(i);
} else {
dir = path->substring(i, idx);
}
if (dir->equals(symParent)) {
Size numDirs = dirs->size();
if (numDirs > 0 &&
!dirs->getTyped(numDirs - 1)->equals(symParent)) {
dirs->removeTyped(numDirs - 1);
} else {
dirs->addTyped(dir);
}
} else if (!dir->equals(symCurrent)) {
dirs->addTyped(dir);
}
}
if (idx == NO_POS) {
endsWithSep = false;
i = len;
} else {
endsWithSep = true;
i = idx + 1;
}
}
StringBuilder::Ptr normal = StringBuilder::create();
if (absolute)
normal->appendChar(SEP);
Size numDirs = dirs->size();
for (Size i = 0; i < numDirs; i++) {
if (i) normal->appendChar(SEP);
normal->appendStr(dirs->getTyped(i));
}
if (numDirs > 0 && endsWithSep)
normal->appendChar(SEP);
if (normal->length() == 0) {
return symCurrent;
} else {
return normal->toString();
}
}