老版本浮点配置不能恢复，直接恢复为默认值并提醒用户

sane/gb_json.cpp

@@ -1035,6 +1035,12 @@ namespace gb
                 jsn_->set_value(hex_t.c_str(), hex_v.c_str());
         }
     }
+    void sane_config::remove_config(const char* title)
+    {
+        std::string hex_t(to_hex_letter(title, lstrlenA(title)));
+        if (jsn_)
+            jsn_->remove(hex_t.c_str());
+    }
     void sane_config::end_setting(bool cancel)
     {
         if (in_setting_)

sane/gb_json.h

@@ -110,6 +110,7 @@ namespace gb
         void begin_setting(bool restore = false);
         void config_changed(const char* title, const char* val, size_t bytes);
         void config_changed(int sn, const char* val, size_t bytes);
+        void remove_config(const char* title);
         void end_setting(bool cancel);
         int id_from_title(const char* title);
         std::string to_text_stream(void);

sane/scanner.cpp

@@ -237,8 +237,10 @@ void scanner::save_config(const wchar_t* file)
 void scanner::apply_config(void)
 {
 	std::string	t(""), v(""), ver(cfg_->get_version());
+	std::wstring notice(L"");
 	if (cfg_->first_config(t, v))
 	{
+		bool rewrite = false;
 		do
 		{
 			int id = cfg_->id_from_title(t.c_str());
@@ -249,7 +251,8 @@ void scanner::apply_config(void)
 				const SANE_Option_Descriptor* desc = hg_sane_middleware::instance()->get_option_descriptor(handle_, id);
 				if (desc)
 				{
-					char* buf = NULL;
+					char*	buf = NULL;
+					bool	omit = false;
 					if (desc->type == SANE_TYPE_STRING)
 					{
 						buf = new char[desc->size + 4];
@@ -259,26 +262,40 @@ void scanner::apply_config(void)
 					}
 					else if (ver.empty() && desc->type == SANE_TYPE_FIXED)	// 升级早期版本没将float转为SANE_Fixed的BUG
 					{
-						fixed = SANE_FIX(*(float*)data);
-						cfg_->config_changed(t.c_str(), (char*)&fixed, sizeof(fixed));
-						data = &fixed;
+						cfg_->remove_config(t.c_str());
+						rewrite = true;
+						omit = true;
 
 						{
 							wchar_t	msg[128] = { 0 };
-							unsigned char* f = (unsigned char*)&v[0], * to = (unsigned char*)data;
-							swprintf_s(msg, _countof(msg) - 1, L"Upgrage '%s' from '%02X%02X%02X%02X' to '%02X%02X%02X%02X'\r\n"
-									, local_trans::a2u(t.c_str(), CP_UTF8).c_str(), f[0], f[1], f[2], f[3]
-									, to[0], to[1], to[2], to[3]);
-							log_info(msg, 0);
+							std::wstring name(local_trans::a2u(t.c_str(), CP_UTF8));
+							unsigned char* f = (unsigned char*)&v[0];
+
+							notice += name + L"\r\n";
+							name.insert(0, L"Discard old configuration '");
+							swprintf_s(msg, _countof(msg) - 1, L"' of value '%02X%02X%02X%02X'\r\n", f[0], f[1], f[2], f[3]);
+							log_info((name + msg).c_str(), 0);
 						}
 					}
-					SANE_Int	after = 0;
-					hg_sane_middleware::instance()->set_option(handle_, id, SANE_ACTION_SET_VALUE, data, &after);
+					if (!omit)
+					{
+						SANE_Int	after = 0;
+						hg_sane_middleware::instance()->set_option(handle_, id, SANE_ACTION_SET_VALUE, data, &after);
+					}
 					if (buf)
 						delete[] buf;
 				}
 			}
 		} while (cfg_->next_config(t, v));
+		if (rewrite)
+		{
+			cfg_->save_to(NULL);
+			if (notice.length())
+			{
+				notice.insert(0, L"\u4E0B\u5217\u914D\u7F6E\u6570\u636E\u9519\u8BEF\uFF0C\u5DF2\u7ECF\u6062\u590D\u5230\u9ED8\u8BA4\u503C\u3002\u5982\u679C\u9700\u8981\uFF0C\u8BF7\u91CD\u65B0\u8BBE\u7F6E\uFF1A\r\n\r\n");
+				MessageBoxW(NULL, notice.c_str(), L"\u52A0\u8F7D\u914D\u7F6E", MB_OK | MB_ICONINFORMATION);
+			}
+		}
 	}
 }
 void scanner::on_ui_event(int uev, void* sender)
@@ -2358,6 +2375,11 @@ void init_log(void)
 		path = std::string(name) + "_twain.log";
 		g_file_ = fopen(path.c_str(), "wb");
 	}
+	if (g_file_)
+	{
+		unsigned short bom = 0x0feff;
+		fwrite(&bom, sizeof(bom), 1, g_file_);
+	}
 }
 void close_log(void)
 {