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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/277667">277667</a></dd>
<dt>Author</dt> <dd>cdumez@apple.com</dd>
<dt>Date</dt> <dd>2021-05-18 11:59:29 -0700 (Tue, 18 May 2021)</dd>
</dl>
<h3>Log Message</h3>
<pre>Use UTF-8 internally from Strings inside SQLiteStatement
https://bugs.webkit.org/show_bug.cgi?id=225890
Reviewed by Darin Adler.
Use UTF-8 internally from Strings inside SQLiteStatement. Our SQLite databases use UTF-8
internally for text encoding (since we open the database with sqlite3_open_v2() and not
sqlite3_open16()).
Previously, we were providing UTF-16 strings to SQLite, which meant it had to convert it
internally to UTF-8. Also, whenever we were requesting a string from SQLite, it had to
convert it from UTF-8 to UTF-16 before returning it to us. Our String constructed from
returned from SQLiteStatement would also be 16-bit encoded, even if all ASCII so we were
potentially wasting memory too.
We now provide UTF-8 to SQLite by using StringView::utf8(). We also request UTF-8 strings
from SQLite and rely on String::fromUTF8() to convert it to a WTF::String. For all ASCII
characters, this means we'll end up with a 8-bit String and save memory.
* platform/sql/SQLiteStatement.cpp:
(WebCore::SQLiteStatement::bindText):
(WebCore::SQLiteStatement::getColumnName):
(WebCore::SQLiteStatement::getColumnText):
* platform/sql/SQLiteStatement.h:</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreplatformnetworkcurlCookieJarDBcpp">trunk/Source/WebCore/platform/network/curl/CookieJarDB.cpp</a></li>
<li><a href="#trunkSourceWebCoreplatformsqlSQLiteStatementcpp">trunk/Source/WebCore/platform/sql/SQLiteStatement.cpp</a></li>
<li><a href="#trunkSourceWebCoreplatformsqlSQLiteStatementh">trunk/Source/WebCore/platform/sql/SQLiteStatement.h</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (277666 => 277667)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog 2021-05-18 18:48:48 UTC (rev 277666)
+++ trunk/Source/WebCore/ChangeLog 2021-05-18 18:59:29 UTC (rev 277667)
</span><span class="lines">@@ -1,3 +1,30 @@
</span><ins>+2021-05-18 Chris Dumez <cdumez@apple.com>
+
+ Use UTF-8 internally from Strings inside SQLiteStatement
+ https://bugs.webkit.org/show_bug.cgi?id=225890
+
+ Reviewed by Darin Adler.
+
+ Use UTF-8 internally from Strings inside SQLiteStatement. Our SQLite databases use UTF-8
+ internally for text encoding (since we open the database with sqlite3_open_v2() and not
+ sqlite3_open16()).
+
+ Previously, we were providing UTF-16 strings to SQLite, which meant it had to convert it
+ internally to UTF-8. Also, whenever we were requesting a string from SQLite, it had to
+ convert it from UTF-8 to UTF-16 before returning it to us. Our String constructed from
+ returned from SQLiteStatement would also be 16-bit encoded, even if all ASCII so we were
+ potentially wasting memory too.
+
+ We now provide UTF-8 to SQLite by using StringView::utf8(). We also request UTF-8 strings
+ from SQLite and rely on String::fromUTF8() to convert it to a WTF::String. For all ASCII
+ characters, this means we'll end up with a 8-bit String and save memory.
+
+ * platform/sql/SQLiteStatement.cpp:
+ (WebCore::SQLiteStatement::bindText):
+ (WebCore::SQLiteStatement::getColumnName):
+ (WebCore::SQLiteStatement::getColumnText):
+ * platform/sql/SQLiteStatement.h:
+
</ins><span class="cx"> 2021-05-18 Said Abou-Hallawa <said@apple.com>
</span><span class="cx">
</span><span class="cx"> Allow logging minimal info about uploading media files
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformnetworkcurlCookieJarDBcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/network/curl/CookieJarDB.cpp (277666 => 277667)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/network/curl/CookieJarDB.cpp 2021-05-18 18:48:48 UTC (rev 277666)
+++ trunk/Source/WebCore/platform/network/curl/CookieJarDB.cpp 2021-05-18 18:59:29 UTC (rev 277667)
</span><span class="lines">@@ -363,7 +363,7 @@
</span><span class="cx"> statement.bindNull(2);
</span><span class="cx"> } else {
</span><span class="cx"> statement.bindText(1, registrableDomain.string());
</span><del>- statement.bindText(2, String("*.") + registrableDomain.string());
</del><ins>+ statement.bindText(2, makeString("*.", registrableDomain.string()));
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> return statement.step() == SQLITE_ROW;
</span><span class="lines">@@ -406,7 +406,7 @@
</span><span class="cx"> if (CookieUtil::isIPAddress(requestHost) || !requestHost.contains('.') || registrableDomain.isEmpty())
</span><span class="cx"> pstmt->bindNull(6);
</span><span class="cx"> else
</span><del>- pstmt->bindText(6, String("*.") + registrableDomain.string());
</del><ins>+ pstmt->bindText(6, makeString("*.", registrableDomain.string()));
</ins><span class="cx">
</span><span class="cx"> Vector<Cookie> results;
</span><span class="cx">
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformsqlSQLiteStatementcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/sql/SQLiteStatement.cpp (277666 => 277667)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/sql/SQLiteStatement.cpp 2021-05-18 18:48:48 UTC (rev 277666)
+++ trunk/Source/WebCore/platform/sql/SQLiteStatement.cpp 2021-05-18 18:59:29 UTC (rev 277667)
</span><span class="lines">@@ -110,22 +110,17 @@
</span><span class="cx"> return bindBlob(index, characters, text.length() * sizeof(UChar));
</span><span class="cx"> }
</span><span class="cx">
</span><del>-int SQLiteStatement::bindText(int index, const String& text)
</del><ins>+int SQLiteStatement::bindText(int index, StringView text)
</ins><span class="cx"> {
</span><span class="cx"> ASSERT(index > 0);
</span><span class="cx"> ASSERT(static_cast<unsigned>(index) <= bindParameterCount());
</span><span class="cx">
</span><del>- // String::characters() returns 0 for the empty string, which SQLite
- // treats as a null, so we supply a non-null pointer for that case.
- auto upconvertedCharacters = StringView(text).upconvertedCharacters();
- UChar anyCharacter = 0;
- const UChar* characters;
- if (text.isEmpty() && !text.isNull())
- characters = &anyCharacter;
- else
- characters = upconvertedCharacters;
</del><ins>+ // Fast path when the input text is all ASCII.
+ if (text.is8Bit() && text.isAllASCII())
+ return sqlite3_bind_text(m_statement, index, text.length() ? reinterpret_cast<const char*>(text.characters8()) : "", text.length(), SQLITE_TRANSIENT);
</ins><span class="cx">
</span><del>- return sqlite3_bind_text16(m_statement, index, characters, sizeof(UChar) * text.length(), SQLITE_TRANSIENT);
</del><ins>+ auto utf8Text = text.utf8();
+ return sqlite3_bind_text(m_statement, index, utf8Text.data(), utf8Text.length(), SQLITE_TRANSIENT);
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> int SQLiteStatement::bindInt(int index, int integer)
</span><span class="lines">@@ -192,7 +187,7 @@
</span><span class="cx"> return String();
</span><span class="cx"> if (columnCount() <= col)
</span><span class="cx"> return String();
</span><del>- return String(reinterpret_cast<const UChar*>(sqlite3_column_name16(m_statement, col)));
</del><ins>+ return String::fromUTF8(sqlite3_column_name(m_statement, col));
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> SQLValue SQLiteStatement::getColumnValue(int col)
</span><span class="lines">@@ -207,18 +202,16 @@
</span><span class="cx"> // "(mostly) ignored"
</span><span class="cx"> sqlite3_value* value = sqlite3_column_value(m_statement, col);
</span><span class="cx"> switch (sqlite3_value_type(value)) {
</span><del>- case SQLITE_INTEGER: // SQLValue and JS don't represent integers, so use FLOAT -case
- case SQLITE_FLOAT:
- return sqlite3_value_double(value);
- case SQLITE_BLOB: // SQLValue and JS don't represent blobs, so use TEXT -case
- case SQLITE_TEXT: {
- const UChar* string = reinterpret_cast<const UChar*>(sqlite3_value_text16(value));
- return StringImpl::create8BitIfPossible(string);
- }
- case SQLITE_NULL:
- return nullptr;
- default:
- break;
</del><ins>+ case SQLITE_INTEGER: // SQLValue and JS don't represent integers, so use FLOAT -case
+ case SQLITE_FLOAT:
+ return sqlite3_value_double(value);
+ case SQLITE_BLOB: // SQLValue and JS don't represent blobs, so use TEXT -case
+ case SQLITE_TEXT:
+ return String::fromUTF8(sqlite3_value_text(value), sqlite3_value_bytes(value));
+ case SQLITE_NULL:
+ return nullptr;
+ default:
+ break;
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> ASSERT_NOT_REACHED();
</span><span class="lines">@@ -232,7 +225,7 @@
</span><span class="cx"> return String();
</span><span class="cx"> if (columnCount() <= col)
</span><span class="cx"> return String();
</span><del>- return String(reinterpret_cast<const UChar*>(sqlite3_column_text16(m_statement, col)), sqlite3_column_bytes16(m_statement, col) / sizeof(UChar));
</del><ins>+ return String::fromUTF8(sqlite3_column_text(m_statement, col), sqlite3_column_bytes(m_statement, col));
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> double SQLiteStatement::getColumnDouble(int col)
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformsqlSQLiteStatementh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/sql/SQLiteStatement.h (277666 => 277667)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/sql/SQLiteStatement.h 2021-05-18 18:48:48 UTC (rev 277666)
+++ trunk/Source/WebCore/platform/sql/SQLiteStatement.h 2021-05-18 18:59:29 UTC (rev 277667)
</span><span class="lines">@@ -40,7 +40,7 @@
</span><span class="cx">
</span><span class="cx"> WEBCORE_EXPORT int bindBlob(int index, const void* blob, int size);
</span><span class="cx"> WEBCORE_EXPORT int bindBlob(int index, const String&);
</span><del>- WEBCORE_EXPORT int bindText(int index, const String&);
</del><ins>+ WEBCORE_EXPORT int bindText(int index, StringView);
</ins><span class="cx"> WEBCORE_EXPORT int bindInt(int index, int);
</span><span class="cx"> WEBCORE_EXPORT int bindInt64(int index, int64_t);
</span><span class="cx"> WEBCORE_EXPORT int bindDouble(int index, double);
</span></span></pre>
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