Cleanup: Remove many unused wstring string_utils.

base/strings/string_util.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // This file defines utility functions for working with strings.
 
 #ifndef BASE_STRINGS_STRING_UTIL_H_
 #define BASE_STRINGS_STRING_UTIL_H_
 
 #include <ctype.h>
@@ skipping 29 matching lines @@
 
 // Same as strncmp but for char16 strings.
 int strncmp16(const char16* s1, const char16* s2, size_t count);
 
 // Wrapper for vsnprintf that always null-terminates and always returns the
 // number of characters that would be in an untruncated formatted
 // string, even when truncation occurs.
 int vsnprintf(char* buffer, size_t size, const char* format, va_list arguments)
     PRINTF_FORMAT(3, 0);
 
-// vswprintf always null-terminates, but when truncation occurs, it will either
-// return -1 or the number of characters that would be in an untruncated
-// formatted string.  The actual return value depends on the underlying
-// C library's vswprintf implementation.
-int vswprintf(wchar_t* buffer, size_t size,
-              const wchar_t* format, va_list arguments)
-    WPRINTF_FORMAT(3, 0);
-
 // Some of these implementations need to be inlined.
 
 // We separate the declaration from the implementation of this inline
 // function just so the PRINTF_FORMAT works.
 inline int snprintf(char* buffer, size_t size, const char* format, ...)
     PRINTF_FORMAT(3, 4);
 inline int snprintf(char* buffer, size_t size, const char* format, ...) {
   va_list arguments;
   va_start(arguments, format);
   int result = vsnprintf(buffer, size, format, arguments);
   va_end(arguments);
   return result;
 }
 
-// We separate the declaration from the implementation of this inline
-// function just so the WPRINTF_FORMAT works.
-inline int swprintf(wchar_t* buffer, size_t size, const wchar_t* format, ...)
-    WPRINTF_FORMAT(3, 4);
-inline int swprintf(wchar_t* buffer, size_t size, const wchar_t* format, ...) {
-  va_list arguments;
-  va_start(arguments, format);
-  int result = vswprintf(buffer, size, format, arguments);
-  va_end(arguments);
-  return result;
-}
-
 // BSD-style safe and consistent string copy functions.
 // Copies |src| to |dst|, where |dst_size| is the total allocated size of |dst|.
 // Copies at most |dst_size|-1 characters, and always NULL terminates |dst|, as
 // long as |dst_size| is not 0.  Returns the length of |src| in characters.
 // If the return value is >= dst_size, then the output was truncated.
 // NOTE: All sizes are in number of characters, NOT in bytes.
 BASE_EXPORT size_t strlcpy(char* dst, const char* src, size_t dst_size);
 BASE_EXPORT size_t wcslcpy(wchar_t* dst, const wchar_t* src, size_t dst_size);
 
 // Scan a wprintf format string to determine whether it's portable across a
@@ skipping 62 matching lines @@
 // These threadsafe functions return references to globally unique empty
 // strings.
 //
 // DO NOT USE THESE AS A GENERAL-PURPOSE SUBSTITUTE FOR DEFAULT CONSTRUCTORS.
 // There is only one case where you should use these: functions which need to
 // return a string by reference (e.g. as a class member accessor), and don't
 // have an empty string to use (e.g. in an error case).  These should not be
 // used as initializers, function arguments, or return values for functions
 // which return by value or outparam.
 BASE_EXPORT const std::string& EmptyString();
-BASE_EXPORT const std::wstring& EmptyWString();
 BASE_EXPORT const string16& EmptyString16();
 
 BASE_EXPORT extern const wchar_t kWhitespaceWide[];
 BASE_EXPORT extern const char16 kWhitespaceUTF16[];
 BASE_EXPORT extern const char kWhitespaceASCII[];
 
 BASE_EXPORT extern const char kUtf8ByteOrderMark[];
 
 // Removes characters in |remove_chars| from anywhere in |input|.  Returns true
 // if any characters were removed.  |remove_chars| must be null-terminated.
@@ skipping 15 matching lines @@
                               const string16& replace_with,
                               string16* output);
 BASE_EXPORT bool ReplaceChars(const std::string& input,
                               const char replace_chars[],
                               const std::string& replace_with,
                               std::string* output);
 
 // Removes characters in |trim_chars| from the beginning and end of |input|.
 // |trim_chars| must be null-terminated.
 // NOTE: Safe to use the same variable for both |input| and |output|.
-BASE_EXPORT bool TrimString(const std::wstring& input,
-                            const wchar_t trim_chars[],
-                            std::wstring* output);
 BASE_EXPORT bool TrimString(const string16& input,
                             const char16 trim_chars[],
                             string16* output);
 BASE_EXPORT bool TrimString(const std::string& input,
                             const char trim_chars[],
                             std::string* output);
 
 // Truncates a string to the nearest UTF-8 character that will leave
 // the string less than or equal to the specified byte size.
 BASE_EXPORT void TruncateUTF8ToByteSize(const std::string& input,
@@ skipping 27 matching lines @@
                                          std::string* output);
 
 // Searches  for CR or LF characters.  Removes all contiguous whitespace
 // strings that contain them.  This is useful when trying to deal with text
 // copied from terminals.
 // Returns |text|, with the following three transformations:
 // (1) Leading and trailing whitespace is trimmed.
 // (2) If |trim_sequences_with_line_breaks| is true, any other whitespace
 //     sequences containing a CR or LF are trimmed.
 // (3) All other whitespace sequences are converted to single spaces.
-BASE_EXPORT std::wstring CollapseWhitespace(
-    const std::wstring& text,
-    bool trim_sequences_with_line_breaks);
 BASE_EXPORT string16 CollapseWhitespace(
     const string16& text,
     bool trim_sequences_with_line_breaks);
 BASE_EXPORT std::string CollapseWhitespaceASCII(
     const std::string& text,
     bool trim_sequences_with_line_breaks);
 
 // Returns true if the passed string is empty or contains only white-space
 // characters.
 BASE_EXPORT bool ContainsOnlyWhitespaceASCII(const std::string& str);
 BASE_EXPORT bool ContainsOnlyWhitespace(const string16& str);
 
 // Returns true if |input| is empty or contains only characters found in
 // |characters|.
-BASE_EXPORT bool ContainsOnlyChars(const std::wstring& input,
-                                   const std::wstring& characters);
 BASE_EXPORT bool ContainsOnlyChars(const string16& input,
                                    const string16& characters);
 BASE_EXPORT bool ContainsOnlyChars(const std::string& input,
                                    const std::string& characters);
 
 // Converts to 7-bit ASCII by truncating. The result must be known to be ASCII
 // beforehand.
 BASE_EXPORT std::string WideToASCII(const std::wstring& wide);
 BASE_EXPORT std::string UTF16ToASCII(const string16& utf16);
 
-// Converts the given wide string to the corresponding Latin1. This will fail
-// (return false) if any characters are more than 255.
-BASE_EXPORT bool WideToLatin1(const std::wstring& wide, std::string* latin1);
-
 // Returns true if the specified string matches the criteria. How can a wide
 // string be 8-bit or UTF8? It contains only characters that are < 256 (in the
 // first case) or characters that use only 8-bits and whose 8-bit
 // representation looks like a UTF-8 string (the second case).
 //
 // Note that IsStringUTF8 checks not only if the input is structurally
 // valid but also if it doesn't contain any non-character codepoint
 // (e.g. U+FFFE). It's done on purpose because all the existing callers want
 // to have the maximum 'discriminating' power from other encodings. If
 // there's a use case for just checking the structural validity, we have to
 // add a new function for that.
 BASE_EXPORT bool IsStringUTF8(const std::string& str);
-BASE_EXPORT bool IsStringASCII(const std::wstring& str);
 BASE_EXPORT bool IsStringASCII(const base::StringPiece& str);
 BASE_EXPORT bool IsStringASCII(const string16& str);
 
 // Converts the elements of the given string.  This version uses a pointer to
 // clearly differentiate it from the non-pointer variant.
 template <class str> inline void StringToLowerASCII(str* s) {
   for (typename str::iterator i = s->begin(); i != s->end(); ++i)
     *i = base::ToLowerASCII(*i);
 }
 
@@ skipping 16 matching lines @@
   str output(s);
   StringToUpperASCII(&output);
   return output;
 }
 
 // Compare the lower-case form of the given string against the given ASCII
 // string.  This is useful for doing checking if an input string matches some
 // token, and it is optimized to avoid intermediate string copies.  This API is
 // borrowed from the equivalent APIs in Mozilla.
 BASE_EXPORT bool LowerCaseEqualsASCII(const std::string& a, const char* b);
-BASE_EXPORT bool LowerCaseEqualsASCII(const std::wstring& a, const char* b);
 BASE_EXPORT bool LowerCaseEqualsASCII(const string16& a, const char* b);
 
 // Same thing, but with string iterators instead.
 BASE_EXPORT bool LowerCaseEqualsASCII(std::string::const_iterator a_begin,
                                       std::string::const_iterator a_end,
                                       const char* b);
-BASE_EXPORT bool LowerCaseEqualsASCII(std::wstring::const_iterator a_begin,
-                                      std::wstring::const_iterator a_end,
-                                      const char* b);
 BASE_EXPORT bool LowerCaseEqualsASCII(string16::const_iterator a_begin,
                                       string16::const_iterator a_end,
                                       const char* b);
 BASE_EXPORT bool LowerCaseEqualsASCII(const char* a_begin,
                                       const char* a_end,
                                       const char* b);
-BASE_EXPORT bool LowerCaseEqualsASCII(const wchar_t* a_begin,
-                                      const wchar_t* a_end,
-                                      const char* b);
 BASE_EXPORT bool LowerCaseEqualsASCII(const char16* a_begin,
                                       const char16* a_end,
                                       const char* b);
 
 // Performs a case-sensitive string compare. The behavior is undefined if both
 // strings are not ASCII.
 BASE_EXPORT bool EqualsASCII(const string16& a, const base::StringPiece& b);
 
 // Returns true if str starts with search, or false otherwise.
 BASE_EXPORT bool StartsWithASCII(const std::string& str,
                                  const std::string& search,
                                  bool case_sensitive);
-BASE_EXPORT bool StartsWith(const std::wstring& str,
-                            const std::wstring& search,
-                            bool case_sensitive);
 BASE_EXPORT bool StartsWith(const string16& str,
                             const string16& search,
                             bool case_sensitive);
 
 // Returns true if str ends with search, or false otherwise.
 BASE_EXPORT bool EndsWith(const std::string& str,
                           const std::string& search,
                           bool case_sensitive);
-BASE_EXPORT bool EndsWith(const std::wstring& str,
-                          const std::wstring& search,
-                          bool case_sensitive);
 BASE_EXPORT bool EndsWith(const string16& str,
                           const string16& search,
                           bool case_sensitive);
 
 
 // Determines the type of ASCII character, independent of locale (the C
 // library versions will change based on locale).
 template <typename Char>
 inline bool IsAsciiWhitespace(Char c) {
   return c == ' ' || c == '\r' || c == '\n' || c == '\t';
@@ skipping 94 matching lines @@
   str->reserve(length_with_null);
   str->resize(length_with_null - 1);
   return &((*str)[0]);
 }
 
 //-----------------------------------------------------------------------------
 
 // Splits a string into its fields delimited by any of the characters in
 // |delimiters|.  Each field is added to the |tokens| vector.  Returns the
 // number of tokens found.
-BASE_EXPORT size_t Tokenize(const std::wstring& str,
-                            const std::wstring& delimiters,
-                            std::vector<std::wstring>* tokens);
 BASE_EXPORT size_t Tokenize(const string16& str,
                             const string16& delimiters,
                             std::vector<string16>* tokens);
 BASE_EXPORT size_t Tokenize(const std::string& str,
                             const std::string& delimiters,
                             std::vector<std::string>* tokens);
 BASE_EXPORT size_t Tokenize(const base::StringPiece& str,
                             const base::StringPiece& delimiters,
                             std::vector<base::StringPiece>* tokens);
 
@@ skipping 61 matching lines @@
 #elif defined(WCHAR_T_IS_UTF32)
   typedef uint32 Unsigned;
 #endif
 };
 template<>
 struct ToUnsigned<short> {
   typedef unsigned short Unsigned;
 };
 
 #endif  // BASE_STRINGS_STRING_UTIL_H_