/*
* Copyright (C) 2005 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.
*/
#ifndef ANDROID_STRING8_H
#define ANDROID_STRING8_H
#include <string> // for std::string
#include <utils/Errors.h>
#include <utils/Unicode.h>
#include <utils/TypeHelpers.h>
#include <string.h> // for strcmp
#include <stdarg.h>
// ---------------------------------------------------------------------------
namespace android {
class String16;
class TextOutput;
//! This is a string holding UTF-8 characters. Does not allow the value more
// than 0x10FFFF, which is not valid unicode codepoint.
class String8
{
public:
/* use String8(StaticLinkage) if you're statically linking against
* libutils and declaring an empty static String8, e.g.:
*
* static String8 sAStaticEmptyString(String8::kEmptyString);
* static String8 sAnotherStaticEmptyString(sAStaticEmptyString);
*/
enum StaticLinkage { kEmptyString };
String8();
explicit String8(StaticLinkage);
String8(const String8& o);
explicit String8(const char* o);
explicit String8(const char* o, size_t numChars);
explicit String8(const String16& o);
explicit String8(const char16_t* o);
explicit String8(const char16_t* o, size_t numChars);
explicit String8(const char32_t* o);
explicit String8(const char32_t* o, size_t numChars);
~String8();
static inline const String8 empty();
static String8 format(const char* fmt, ...) __attribute__((format (printf, 1, 2)));
static String8 formatV(const char* fmt, va_list args);
inline const char* c_str() const;
inline const char* string() const;
// TODO(b/35363681): remove
private:
static inline std::string std_string(const String8& str);
public:
inline size_t size() const;
inline size_t bytes() const;
inline bool isEmpty() const;
size_t length() const;
void clear();
void setTo(const String8& other);
status_t setTo(const char* other);
status_t setTo(const char* other, size_t numChars);
status_t setTo(const char16_t* other, size_t numChars);
status_t setTo(const char32_t* other,
size_t length);
status_t append(const String8& other);
status_t append(const char* other);
status_t append(const char* other, size_t numChars);
status_t appendFormat(const char* fmt, ...)
__attribute__((format (printf, 2, 3)));
status_t appendFormatV(const char* fmt, va_list args);
// Note that this function takes O(N) time to calculate the value.
// No cache value is stored.
size_t getUtf32Length() const;
int32_t getUtf32At(size_t index,
size_t *next_index) const;
void getUtf32(char32_t* dst) const;
inline String8& operator=(const String8& other);
inline String8& operator=(const char* other);
inline String8& operator+=(const String8& other);
inline String8 operator+(const String8& other) const;
inline String8& operator+=(const char* other);
inline String8 operator+(const char* other) const;
inline int compare(const String8& other) const;
inline bool operator<(const String8& other) const;
inline bool operator<=(const String8& other) const;
inline bool operator==(const String8& other) const;
inline bool operator!=(const String8& other) const;
inline bool operator>=(const String8& other) const;
inline bool operator>(const String8& other) const;
inline bool operator<(const char* other) const;
inline bool operator<=(const char* other) const;
inline bool operator==(const char* other) const;
inline bool operator!=(const char* other) const;
inline bool operator>=(const char* other) const;
inline bool operator>(const char* other) const;
inline operator const char*() const;
char* lockBuffer(size_t size);
void unlockBuffer();
status_t unlockBuffer(size_t size);
// return the index of the first byte of other in this at or after
// start, or -1 if not found
ssize_t find(const char* other, size_t start = 0) const;
// return true if this string contains the specified substring
inline bool contains(const char* other) const;
// removes all occurrence of the specified substring
// returns true if any were found and removed
bool removeAll(const char* other);
void toLower();
void toLower(size_t start, size_t numChars);
void toUpper();
void toUpper(size_t start, size_t numChars);
/*
* These methods operate on the string as if it were a path name.
*/
/*
* Set the filename field to a specific value.
*
* Normalizes the filename, removing a trailing '/' if present.
*/
void setPathName(const char* name);
void setPathName(const char* name, size_t numChars);
/*
* Get just the filename component.
*
* "/tmp/foo/bar.c" --> "bar.c"
*/
String8 getPathLeaf(void) const;
/*
* Remove the last (file name) component, leaving just the directory
* name.
*
* "/tmp/foo/bar.c" --> "/tmp/foo"
* "/tmp" --> "" // ????? shouldn't this be "/" ???? XXX
* "bar.c" --> ""
*/
String8 getPathDir(void) const;
/*
* Retrieve the front (root dir) component. Optionally also return the
* remaining components.
*
* "/tmp/foo/bar.c" --> "tmp" (remain = "foo/bar.c")
* "/tmp" --> "tmp" (remain = "")
* "bar.c" --> "bar.c" (remain = "")
*/
String8 walkPath(String8* outRemains = NULL) const;
/*
* Return the filename extension. This is the last '.' and any number
* of characters that follow it. The '.' is included in case we
* decide to expand our definition of what constitutes an extension.
*
* "/tmp/foo/bar.c" --> ".c"
* "/tmp" --> ""
* "/tmp/foo.bar/baz" --> ""
* "foo.jpeg" --> ".jpeg"
* "foo." --> ""
*/
String8 getPathExtension(void) const;
/*
* Return the path without the extension. Rules for what constitutes
* an extension are described in the comment for getPathExtension().
*
* "/tmp/foo/bar.c" --> "/tmp/foo/bar"
*/
String8 getBasePath(void) const;
/*
* Add a component to the pathname. We guarantee that there is
* exactly one path separator between the old path and the new.
* If there is no existing name, we just copy the new name in.
*
* If leaf is a fully qualified path (i.e. starts with '/', it
* replaces whatever was there before.
*/
String8& appendPath(const char* leaf);
String8& appendPath(const String8& leaf) { return appendPath(leaf.string()); }
/*
* Like appendPath(), but does not affect this string. Returns a new one instead.
*/
String8 appendPathCopy(const char* leaf) const
{ String8 p(*this); p.appendPath(leaf); return p; }
String8 appendPathCopy(const String8& leaf) const { return appendPathCopy(leaf.string()); }
/*
* Converts all separators in this string to /, the default path separator.
*
* If the default OS separator is backslash, this converts all
* backslashes to slashes, in-place. Otherwise it does nothing.
* Returns self.
*/
String8& convertToResPath();
private:
status_t real_append(const char* other, size_t numChars);
char* find_extension(void) const;
const char* mString;
};
// String8 can be trivially moved using memcpy() because moving does not
// require any change to the underlying SharedBuffer contents or reference count.
ANDROID_TRIVIAL_MOVE_TRAIT(String8)
// ---------------------------------------------------------------------------
// No user servicable parts below.
inline int compare_type(const String8& lhs, const String8& rhs)
{
return lhs.compare(rhs);
}
inline int strictly_order_type(const String8& lhs, const String8& rhs)
{
return compare_type(lhs, rhs) < 0;
}
inline const String8 String8::empty() {
return String8();
}
inline const char* String8::c_str() const
{
return mString;
}
inline const char* String8::string() const
{
return mString;
}
inline std::string String8::std_string(const String8& str)
{
return std::string(str.string());
}
inline size_t String8::size() const
{
return length();
}
inline bool String8::isEmpty() const
{
return length() == 0;
}
inline size_t String8::bytes() const
{
return length();
}
inline bool String8::contains(const char* other) const
{
return find(other) >= 0;
}
inline String8& String8::operator=(const String8& other)
{
setTo(other);
return *this;
}
inline String8& String8::operator=(const char* other)
{
setTo(other);
return *this;
}
inline String8& String8::operator+=(const String8& other)
{
append(other);
return *this;
}
inline String8 String8::operator+(const String8& other) const
{
String8 tmp(*this);
tmp += other;
return tmp;
}
inline String8& String8::operator+=(const char* other)
{
append(other);
return *this;
}
inline String8 String8::operator+(const char* other) const
{
String8 tmp(*this);
tmp += other;
return tmp;
}
inline int String8::compare(const String8& other) const
{
return strcmp(mString, other.mString);
}
inline bool String8::operator<(const String8& other) const
{
return strcmp(mString, other.mString) < 0;
}
inline bool String8::operator<=(const String8& other) const
{
return strcmp(mString, other.mString) <= 0;
}
inline bool String8::operator==(const String8& other) const
{
return strcmp(mString, other.mString) == 0;
}
inline bool String8::operator!=(const String8& other) const
{
return strcmp(mString, other.mString) != 0;
}
inline bool String8::operator>=(const String8& other) const
{
return strcmp(mString, other.mString) >= 0;
}
inline bool String8::operator>(const String8& other) const
{
return strcmp(mString, other.mString) > 0;
}
inline bool String8::operator<(const char* other) const
{
return strcmp(mString, other) < 0;
}
inline bool String8::operator<=(const char* other) const
{
return strcmp(mString, other) <= 0;
}
inline bool String8::operator==(const char* other) const
{
return strcmp(mString, other) == 0;
}
inline bool String8::operator!=(const char* other) const
{
return strcmp(mString, other) != 0;
}
inline bool String8::operator>=(const char* other) const
{
return strcmp(mString, other) >= 0;
}
inline bool String8::operator>(const char* other) const
{
return strcmp(mString, other) > 0;
}
inline String8::operator const char*() const
{
return mString;
}
} // namespace android
// ---------------------------------------------------------------------------
#endif // ANDROID_STRING8_H