/* * 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 // Need this for the char16_t type; String8.h should not // be depedent on the String16 class. #include #include #include #include // --------------------------------------------------------------------------- extern "C" { typedef uint32_t char32_t; size_t strlen32(const char32_t *); size_t strnlen32(const char32_t *, size_t); /* * Returns the length of "src" when "src" is valid UTF-8 string. * Returns 0 if src is NULL, 0-length string or non UTF-8 string. * This function should be used to determine whether "src" is valid UTF-8 * characters with valid unicode codepoints. "src" must be null-terminated. * * If you are going to use other GetUtf... functions defined in this header * with string which may not be valid UTF-8 with valid codepoint (form 0 to * 0x10FFFF), you should use this function before calling others, since the * other functions do not check whether the string is valid UTF-8 or not. * * If you do not care whether "src" is valid UTF-8 or not, you should use * strlen() as usual, which should be much faster. */ size_t utf8_length(const char *src); /* * Returns the UTF-32 length of "src". */ size_t utf32_length(const char *src, size_t src_len); /* * Returns the UTF-8 length of "src". */ size_t utf8_length_from_utf16(const char16_t *src, size_t src_len); /* * Returns the UTF-8 length of "src". */ size_t utf8_length_from_utf32(const char32_t *src, size_t src_len); /* * Returns the unicode value at "index". * Returns -1 when the index is invalid (equals to or more than "src_len"). * If returned value is positive, it is able to be converted to char32_t, which * is unsigned. Then, if "next_index" is not NULL, the next index to be used is * stored in "next_index". "next_index" can be NULL. */ int32_t utf32_at(const char *src, size_t src_len, size_t index, size_t *next_index); /* * Stores a UTF-32 string converted from "src" in "dst", if "dst_length" is not * large enough to store the string, the part of the "src" string is stored * into "dst". * Returns the size actually used for storing the string. * "dst" is not null-terminated when dst_len is fully used (like strncpy). */ size_t utf8_to_utf32(const char* src, size_t src_len, char32_t* dst, size_t dst_len); /* * Stores a UTF-8 string converted from "src" in "dst", if "dst_length" is not * large enough to store the string, the part of the "src" string is stored * into "dst" as much as possible. See the examples for more detail. * Returns the size actually used for storing the string. * dst" is not null-terminated when dst_len is fully used (like strncpy). * * Example 1 * "src" == \u3042\u3044 (\xE3\x81\x82\xE3\x81\x84) * "src_len" == 2 * "dst_len" >= 7 * -> * Returned value == 6 * "dst" becomes \xE3\x81\x82\xE3\x81\x84\0 * (note that "dst" is null-terminated) * * Example 2 * "src" == \u3042\u3044 (\xE3\x81\x82\xE3\x81\x84) * "src_len" == 2 * "dst_len" == 5 * -> * Returned value == 3 * "dst" becomes \xE3\x81\x82\0 * (note that "dst" is null-terminated, but \u3044 is not stored in "dst" * since "dst" does not have enough size to store the character) * * Example 3 * "src" == \u3042\u3044 (\xE3\x81\x82\xE3\x81\x84) * "src_len" == 2 * "dst_len" == 6 * -> * Returned value == 6 * "dst" becomes \xE3\x81\x82\xE3\x81\x84 * (note that "dst" is NOT null-terminated, like strncpy) */ size_t utf32_to_utf8(const char32_t* src, size_t src_len, char* dst, size_t dst_len); size_t utf16_to_utf8(const char16_t* src, size_t src_len, char* dst, size_t dst_len); } // --------------------------------------------------------------------------- namespace android { 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: String8(); 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(); inline const char* string() const; inline size_t size() const; inline size_t length() const; inline size_t bytes() const; inline const SharedBuffer* sharedBuffer() const; 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); // 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; size_t getUtf32(char32_t* dst, size_t dst_len) 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; 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 up to * four 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; }; TextOutput& operator<<(TextOutput& to, const String16& val); // --------------------------------------------------------------------------- // 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 char* String8::string() const { return mString; } inline size_t String8::length() const { return SharedBuffer::sizeFromData(mString)-1; } inline size_t String8::size() const { return length(); } inline size_t String8::bytes() const { return SharedBuffer::sizeFromData(mString)-1; } inline const SharedBuffer* String8::sharedBuffer() const { return SharedBuffer::bufferFromData(mString); } 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; 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; 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