695 lines
22 KiB
C++
695 lines
22 KiB
C++
// Copyright (c) 2010 Marshall A. Greenblatt. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the name Chromium Embedded
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// Framework nor the names of its contributors may be used to endorse
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// or promote products derived from this software without specific prior
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// written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef _CEF_STRING_WRAPPERS_H
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#define _CEF_STRING_WRAPPERS_H
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#include "cef_string_types.h"
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#ifdef BUILDING_CEF_SHARED
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#include "base/string16.h"
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#endif
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#include <memory.h>
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#include <string>
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///
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// Traits implementation for wide character strings.
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///
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struct CefStringTraitsWide {
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typedef wchar_t char_type;
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typedef cef_string_wide_t struct_type;
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typedef cef_string_userfree_wide_t userfree_struct_type;
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static inline void clear(struct_type *s) { cef_string_wide_clear(s); }
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static inline int set(const char_type* src, size_t src_size,
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struct_type *output, int copy)
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{ return cef_string_wide_set(src, src_size, output, copy); }
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static inline int compare(const struct_type* s1, const struct_type* s2)
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{ return cef_string_wide_cmp(s1, s2); }
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static inline userfree_struct_type userfree_alloc()
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{ return cef_string_userfree_wide_alloc(); }
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static inline void userfree_free(userfree_struct_type ufs)
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{ return cef_string_userfree_wide_free(ufs); }
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// Conversion methods.
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static inline bool from_ascii(const char* str, size_t len, struct_type *s)
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{
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return cef_string_ascii_to_wide(str, len, s) ? true : false;
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}
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static inline std::string to_string(const struct_type *s)
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{
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cef_string_utf8_t cstr;
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memset(&cstr, 0, sizeof(cstr));
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cef_string_wide_to_utf8(s->str, s->length, &cstr);
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std::string str;
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if (cstr.length > 0)
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str = std::string(cstr.str, cstr.length);
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cef_string_utf8_clear(&cstr);
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return str;
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}
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static inline bool from_string(const std::string& str, struct_type *s)
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{
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return cef_string_utf8_to_wide(str.c_str(), str.length(), s) ? true : false;
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}
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static inline std::wstring to_wstring(const struct_type *s)
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{
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return std::wstring(s->str, s->length);
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}
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static inline bool from_wstring(const std::wstring& str, struct_type *s)
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{
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return cef_string_wide_set(str.c_str(), str.length(), s, true) ?
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true : false;
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}
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#if defined(BUILDING_CEF_SHARED)
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#if defined(WCHAR_T_IS_UTF32)
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static inline string16 to_string16(const struct_type *s)
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{
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cef_string_utf16_t cstr;
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memset(&cstr, 0, sizeof(cstr));
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cef_string_wide_to_utf16(s->str, s->length, &cstr);
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string16 str;
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if (cstr.length > 0)
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str = string16(cstr.str, cstr.length);
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cef_string_utf16_clear(&cstr);
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return str;
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}
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static inline bool from_string16(const string16& str, struct_type *s)
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{
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return cef_string_utf16_to_wide(str.c_str(), str.length(), s) ?
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true : false;
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}
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#else // WCHAR_T_IS_UTF32
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static inline string16 to_string16(const struct_type *s)
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{
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return string16(s->str, s->length);
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}
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static inline bool from_string16(const string16& str, struct_type *s)
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{
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return cef_string_wide_set(str.c_str(), str.length(), s, true) ?
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true : false;
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}
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#endif // WCHAR_T_IS_UTF32
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#endif // BUILDING_CEF_SHARED
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};
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///
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// Traits implementation for utf8 character strings.
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///
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struct CefStringTraitsUTF8 {
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typedef char char_type;
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typedef cef_string_utf8_t struct_type;
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typedef cef_string_userfree_utf8_t userfree_struct_type;
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static inline void clear(struct_type *s) { cef_string_utf8_clear(s); }
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static inline int set(const char_type* src, size_t src_size,
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struct_type *output, int copy)
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{ return cef_string_utf8_set(src, src_size, output, copy); }
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static inline int compare(const struct_type* s1, const struct_type* s2)
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{ return cef_string_utf8_cmp(s1, s2); }
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static inline userfree_struct_type userfree_alloc()
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{ return cef_string_userfree_utf8_alloc(); }
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static inline void userfree_free(userfree_struct_type ufs)
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{ return cef_string_userfree_utf8_free(ufs); }
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// Conversion methods.
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static inline bool from_ascii(const char* str, size_t len, struct_type* s)
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{
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return cef_string_utf8_copy(str, len, s) ? true : false;
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}
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static inline std::string to_string(const struct_type* s)
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{
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return std::string(s->str, s->length);
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}
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static inline bool from_string(const std::string& str, struct_type* s)
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{
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return cef_string_utf8_copy(str.c_str(), str.length(), s) ? true : false;
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}
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static inline std::wstring to_wstring(const struct_type* s)
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{
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cef_string_wide_t cstr;
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memset(&cstr, 0, sizeof(cstr));
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cef_string_utf8_to_wide(s->str, s->length, &cstr);
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std::wstring str;
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if (cstr.length > 0)
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str = std::wstring(cstr.str, cstr.length);
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cef_string_wide_clear(&cstr);
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return str;
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}
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static inline bool from_wstring(const std::wstring& str, struct_type* s)
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{
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return cef_string_wide_to_utf8(str.c_str(), str.length(), s) ? true : false;
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}
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#if defined(BUILDING_CEF_SHARED)
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static inline string16 to_string16(const struct_type* s)
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{
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cef_string_utf16_t cstr;
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memset(&cstr, 0, sizeof(cstr));
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cef_string_utf8_to_utf16(s->str, s->length, &cstr);
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string16 str;
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if (cstr.length > 0)
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str = string16(cstr.str, cstr.length);
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cef_string_utf16_clear(&cstr);
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return str;
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}
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static inline bool from_string16(const string16& str, struct_type* s)
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{
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return cef_string_utf16_to_utf8(str.c_str(), str.length(), s) ?
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true : false;
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}
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#endif // BUILDING_CEF_SHARED
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};
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///
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// Traits implementation for utf16 character strings.
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///
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struct CefStringTraitsUTF16 {
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typedef char16_t char_type;
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typedef cef_string_utf16_t struct_type;
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typedef cef_string_userfree_utf16_t userfree_struct_type;
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static inline void clear(struct_type *s) { cef_string_utf16_clear(s); }
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static inline int set(const char_type* src, size_t src_size,
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struct_type *output, int copy)
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{ return cef_string_utf16_set(src, src_size, output, copy); }
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static inline int compare(const struct_type* s1, const struct_type* s2)
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{ return cef_string_utf16_cmp(s1, s2); }
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static inline userfree_struct_type userfree_alloc()
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{ return cef_string_userfree_utf16_alloc(); }
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static inline void userfree_free(userfree_struct_type ufs)
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{ return cef_string_userfree_utf16_free(ufs); }
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// Conversion methods.
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static inline bool from_ascii(const char* str, size_t len, struct_type* s)
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{
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return cef_string_ascii_to_utf16(str, len, s) ? true : false;
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}
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static inline std::string to_string(const struct_type* s)
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{
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cef_string_utf8_t cstr;
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memset(&cstr, 0, sizeof(cstr));
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cef_string_utf16_to_utf8(s->str, s->length, &cstr);
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std::string str;
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if (cstr.length > 0)
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str = std::string(cstr.str, cstr.length);
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cef_string_utf8_clear(&cstr);
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return str;
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}
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static inline bool from_string(const std::string& str, struct_type* s)
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{
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return cef_string_utf8_to_utf16(str.c_str(), str.length(), s) ?
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true : false;
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}
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#if defined(WCHAR_T_IS_UTF32)
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static inline std::wstring to_wstring(const struct_type* s)
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{
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cef_string_wide_t cstr;
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memset(&cstr, 0, sizeof(cstr));
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cef_string_utf16_to_wide(s->str, s->length, &cstr);
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std::wstring str;
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if (cstr.length > 0)
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str = std::wstring(cstr.str, cstr.length);
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cef_string_wide_clear(&cstr);
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return str;
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}
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static inline bool from_wstring(const std::wstring& str, struct_type* s)
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{
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return cef_string_wide_to_utf16(str.c_str(), str.length(), s) ?
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true : false;
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}
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#else // WCHAR_T_IS_UTF32
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static inline std::wstring to_wstring(const struct_type* s)
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{
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return std::wstring(s->str, s->length);
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}
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static inline bool from_wstring(const std::wstring& str, struct_type* s)
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{
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return cef_string_utf16_set(str.c_str(), str.length(), s, true) ?
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true : false;
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}
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#endif // WCHAR_T_IS_UTF32
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#if defined(BUILDING_CEF_SHARED)
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static inline string16 to_string16(const struct_type* s)
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{
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return string16(s->str, s->length);
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}
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static inline bool from_string16(const string16& str, struct_type* s)
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{
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return cef_string_utf16_set(str.c_str(), str.length(), s, true) ?
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true : false;
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}
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#endif // BUILDING_CEF_SHARED
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};
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///
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// CEF string classes can convert between all supported string types. For
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// example, the CefStringWide class uses wchar_t as the underlying character
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// type and provides two approaches for converting data to/from a UTF8 string
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// (std::string).
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// <p>
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// 1. Implicit conversion using the assignment operator overload.
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// <pre>
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// CefStringWide aCefString;
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// std::string aUTF8String;
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// aCefString = aUTF8String; // Assign std::string to CefStringWide
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// aUTF8String = aCefString; // Assign CefStringWide to std::string
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// </pre>
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// 2. Explicit conversion using the FromString/ToString methods.
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// <pre>
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// CefStringWide aCefString;
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// std::string aUTF8String;
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// aCefString.FromString(aUTF8String); // Assign std::string to CefStringWide
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// aUTF8String = aCefString.ToString(); // Assign CefStringWide to std::string
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// </pre>
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// Conversion will only occur if the assigned value is a different string type.
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// Assigning a std::string to a CefStringUTF8, for example, will copy the data
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// without performing a conversion.
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// </p>
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// CEF string classes are safe for reading from multiple threads but not for
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// modification. It is the user's responsibility to provide synchronization if
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// modifying CEF strings from multiple threads.
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///
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template <class traits>
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class CefStringBase {
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public:
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typedef typename traits::char_type char_type;
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typedef typename traits::struct_type struct_type;
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typedef typename traits::userfree_struct_type userfree_struct_type;
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///
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// Default constructor.
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///
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CefStringBase() : string_(NULL), owner_(false) {}
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///
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// Create a new string from an existing string. Data will always be copied.
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///
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CefStringBase(const CefStringBase& str) : string_(NULL), owner_(false)
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{ FromString(str.c_str(), str.length(), true); }
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///
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// Create a new string from an existing std::string. Data will be always
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// copied. Translation will occur if necessary based on the underlying string
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// type.
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///
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CefStringBase(const std::string& src) : string_(NULL), owner_(false)
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{ FromString(src); }
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CefStringBase(const char* src) : string_(NULL), owner_(false)
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{ FromString(std::string(src)); }
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///
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// Create a new string from an existing std::wstring. Data will be always
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// copied. Translation will occur if necessary based on the underlying string
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// type.
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///
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CefStringBase(const std::wstring& src) : string_(NULL), owner_(false)
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{ FromWString(src); }
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CefStringBase(const wchar_t* src) : string_(NULL), owner_(false)
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{ FromWString(std::wstring(src)); }
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#if (defined(BUILDING_CEF_SHARED) && defined(WCHAR_T_IS_UTF32))
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///
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// Create a new string from an existing string16. Data will be always
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// copied. Translation will occur if necessary based on the underlying string
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// type.
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///
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CefStringBase(const string16& src) : string_(NULL), owner_(false)
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{ FromString16(src); }
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CefStringBase(const char16_t* src) : string_(NULL), owner_(false)
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{ FromString16(string16(src)); }
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#endif // BUILDING_CEF_SHARED && WCHAR_T_IS_UTF32
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///
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// Create a new string from an existing character array. If |copy| is true
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// this class will copy the data. Otherwise, this class will reference the
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// existing data. Referenced data must exist for the lifetime of this class
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// and will not be freed by this class.
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///
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CefStringBase(const char_type* src, size_t src_len, bool copy)
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: string_(NULL), owner_(false)
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{ FromString(src, src_len, copy); }
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///
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// Create a new string referencing an existing string structure without taking
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// ownership. Referenced structures must exist for the lifetime of this class
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// and will not be freed by this class.
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///
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CefStringBase(const struct_type* src) : string_(NULL), owner_(false)
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{
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if (!src)
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return;
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// Reference the existing structure without taking ownership.
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Attach(const_cast<struct_type*>(src), false);
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}
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virtual ~CefStringBase() { ClearAndFree(); }
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// The following methods are named for compatibility with the standard library
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// string template types.
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///
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// Return a read-only pointer to the string data.
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///
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const char_type* c_str() const { return (string_ ? string_->str : NULL); }
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///
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// Return the length of the string data.
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///
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size_t length() const { return (string_ ? string_->length : 0); }
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///
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// Return the length of the string data.
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///
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inline size_t size() const { return length(); }
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///
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// Returns true if the string is empty.
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///
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bool empty() const { return (string_ == NULL || string_->length == 0); }
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///
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// Compare this string to the specified string.
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///
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int compare(const CefStringBase& str) const
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{
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if (empty() && str.empty())
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return 0;
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if (empty())
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return -1;
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if (str.empty())
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return 1;
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return traits::compare(string_, str.GetStruct());
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}
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///
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// Clear the string data.
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///
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void clear()
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{
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if (!empty())
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traits::clear(string_);
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}
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// The following methods are unique to CEF string template types.
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///
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// Returns true if this class owns the underlying string structure.
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///
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bool IsOwner() const { return owner_; }
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///
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// Returns a read-only pointer to the underlying string structure. May return
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// NULL if no structure is currently allocated.
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///
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const struct_type* GetStruct() const { return string_; }
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///
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// Returns a writable pointer to the underlying string structure. Will never
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// return NULL.
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///
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struct_type* GetWritableStruct()
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{
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AllocIfNeeded();
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return string_;
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}
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///
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// Clear the state of this class. The underlying string structure and data
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// will be freed if this class owns the structure.
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///
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void ClearAndFree()
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{
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if (!string_)
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return;
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if (owner_) {
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clear();
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delete string_;
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}
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string_ = NULL;
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owner_ = false;
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}
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///
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// Attach to the specified string structure. If |owner| is true this class
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// will take ownership of the structure.
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///
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void Attach(struct_type* str, bool owner)
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{
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// Free the previous structure and data, if any.
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ClearAndFree();
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string_ = str;
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owner_ = owner;
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}
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///
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// Take ownership of the specified userfree structure's string data. The
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// userfree structure itself will be freed. Only use this method with userfree
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// structures.
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///
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void AttachToUserFree(userfree_struct_type str)
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{
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// Free the previous structure and data, if any.
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ClearAndFree();
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if (!str)
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return;
|
|
|
|
AllocIfNeeded();
|
|
owner_ = true;
|
|
memcpy(string_, str, sizeof(struct_type));
|
|
|
|
// Free the |str| structure but not the data.
|
|
memset(str, 0, sizeof(struct_type));
|
|
traits::userfree_free(str);
|
|
}
|
|
|
|
///
|
|
// Detach from the underlying string structure. To avoid memory leaks only use
|
|
// this method if you already hold a pointer to the underlying string
|
|
// structure.
|
|
///
|
|
void Detach()
|
|
{
|
|
string_ = NULL;
|
|
owner_ = false;
|
|
}
|
|
|
|
///
|
|
// Create a userfree structure and give it ownership of this class' string
|
|
// data. This class will be disassociated from the data. May return NULL if
|
|
// this string class currently contains no data.
|
|
///
|
|
userfree_struct_type DetachToUserFree()
|
|
{
|
|
if (empty())
|
|
return NULL;
|
|
|
|
userfree_struct_type str = traits::userfree_alloc();
|
|
memcpy(str, string_, sizeof(struct_type));
|
|
|
|
// Free this class' structure but not the data.
|
|
memset(string_, 0, sizeof(struct_type));
|
|
ClearAndFree();
|
|
|
|
return str;
|
|
}
|
|
|
|
///
|
|
// Set this string's data to the specified character array. If |copy| is true
|
|
// this class will copy the data. Otherwise, this class will reference the
|
|
// existing data. Referenced data must exist for the lifetime of this class
|
|
// and will not be freed by this class.
|
|
///
|
|
bool FromString(const char_type* src, size_t src_len, bool copy)
|
|
{
|
|
if (src == NULL || src_len == 0) {
|
|
clear();
|
|
return true;
|
|
}
|
|
AllocIfNeeded();
|
|
return traits::set(src, src_len, string_, copy) ? true : false;
|
|
}
|
|
|
|
///
|
|
// Set this string's data from an existing ASCII string. Data will be always
|
|
// copied. Translation will occur if necessary based on the underlying string
|
|
// type.
|
|
///
|
|
bool FromASCII(const char* str)
|
|
{
|
|
size_t len = str ? strlen(str) : 0;
|
|
if (len == 0) {
|
|
clear();
|
|
return true;
|
|
}
|
|
AllocIfNeeded();
|
|
return traits::from_ascii(str, len, string_);
|
|
}
|
|
|
|
///
|
|
// Return this string's data as a std::string. Translation will occur if
|
|
// necessary based on the underlying string type.
|
|
///
|
|
std::string ToString() const
|
|
{
|
|
if (empty())
|
|
return std::string();
|
|
return traits::to_string(string_);
|
|
}
|
|
|
|
///
|
|
// Set this string's data from an existing std::string. Data will be always
|
|
// copied. Translation will occur if necessary based on the underlying string
|
|
// type.
|
|
///
|
|
bool FromString(const std::string& str)
|
|
{
|
|
if (str.empty()) {
|
|
clear();
|
|
return true;
|
|
}
|
|
AllocIfNeeded();
|
|
return traits::from_string(str, string_);
|
|
}
|
|
|
|
///
|
|
// Return this string's data as a std::wstring. Translation will occur if
|
|
// necessary based on the underlying string type.
|
|
///
|
|
std::wstring ToWString() const
|
|
{
|
|
if (empty())
|
|
return std::wstring();
|
|
return traits::to_wstring(string_);
|
|
}
|
|
|
|
///
|
|
// Set this string's data from an existing std::wstring. Data will be always
|
|
// copied. Translation will occur if necessary based on the underlying string
|
|
// type.
|
|
///
|
|
bool FromWString(const std::wstring& str)
|
|
{
|
|
if (str.empty()) {
|
|
clear();
|
|
return true;
|
|
}
|
|
AllocIfNeeded();
|
|
return traits::from_wstring(str, string_);
|
|
}
|
|
#if defined(BUILDING_CEF_SHARED)
|
|
///
|
|
// Return this string's data as a string16. Translation will occur if
|
|
// necessary based on the underlying string type.
|
|
///
|
|
string16 ToString16() const
|
|
{
|
|
if (empty())
|
|
return string16();
|
|
return traits::to_string16(string_);
|
|
}
|
|
|
|
///
|
|
// Set this string's data from an existing string16. Data will be always
|
|
// copied. Translation will occur if necessary based on the underlying string
|
|
// type.
|
|
///
|
|
bool FromString16(const string16& str)
|
|
{
|
|
if (str.empty()) {
|
|
clear();
|
|
return true;
|
|
}
|
|
AllocIfNeeded();
|
|
return traits::from_string16(str, string_);
|
|
}
|
|
#endif // BUILDING_CEF_SHARED
|
|
|
|
///
|
|
// Comparison operator overloads.
|
|
///
|
|
bool operator<(const CefStringBase& str) const
|
|
{ return (compare(str) < 0); }
|
|
bool operator<=(const CefStringBase& str) const
|
|
{ return (compare(str) <= 0); }
|
|
bool operator>(const CefStringBase& str) const
|
|
{ return (compare(str) > 0); }
|
|
bool operator>=(const CefStringBase& str) const
|
|
{ return (compare(str) >= 0); }
|
|
bool operator==(const CefStringBase& str) const
|
|
{ return (compare(str) == 0); }
|
|
bool operator!=(const CefStringBase& str) const
|
|
{ return (compare(str) != 0); }
|
|
|
|
///
|
|
// Assignment operator overloads.
|
|
///
|
|
CefStringBase& operator=(const CefStringBase& str)
|
|
{ FromString(str.c_str(), str.length(), true); return *this; }
|
|
operator std::string() const { return ToString(); }
|
|
CefStringBase& operator=(const std::string& str)
|
|
{ FromString(str); return *this; }
|
|
CefStringBase& operator=(const char* str)
|
|
{ FromString(std::string(str)); return *this; }
|
|
operator std::wstring() const { return ToWString(); }
|
|
CefStringBase& operator=(const std::wstring& str)
|
|
{ FromWString(str); return *this; }
|
|
CefStringBase& operator=(const wchar_t* str)
|
|
{ FromWString(std::wstring(str)); return *this; }
|
|
#if (defined(BUILDING_CEF_SHARED) && defined(WCHAR_T_IS_UTF32))
|
|
operator string16() const { return ToString16(); }
|
|
CefStringBase& operator=(const string16& str)
|
|
{ FromString16(str); return *this; }
|
|
CefStringBase& operator=(const char16_t* str)
|
|
{ FromString16(string16(str)); return *this; }
|
|
#endif // BUILDING_CEF_SHARED && WCHAR_T_IS_UTF32
|
|
|
|
private:
|
|
// Allocate the string structure if it doesn't already exist.
|
|
void AllocIfNeeded()
|
|
{
|
|
if (string_ == NULL) {
|
|
string_ = new struct_type;
|
|
memset(string_, 0, sizeof(struct_type));
|
|
owner_ = true;
|
|
}
|
|
}
|
|
|
|
struct_type* string_;
|
|
bool owner_;
|
|
};
|
|
|
|
|
|
typedef CefStringBase<CefStringTraitsWide> CefStringWide;
|
|
typedef CefStringBase<CefStringTraitsUTF8> CefStringUTF8;
|
|
typedef CefStringBase<CefStringTraitsUTF16> CefStringUTF16;
|
|
|
|
#endif // _CEF_STRING_WRAPPERS_H
|