1 files changed, 182 insertions, 0 deletions
diff --git a/sal/rtl/strbuf.cxx b/sal/rtl/strbuf.cxx
new file mode 100644
index 000000000..b9f4cd688
--- /dev/null
+++ b/sal/rtl/strbuf.cxx
@@ -0,0 +1,182 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you 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 .
+ */
+
+#include <string.h>
+
+#include <osl/interlck.h>
+#include <rtl/strbuf.hxx>
+#include "strimp.hxx"
+
+/*************************************************************************
+ *  rtl_stringbuffer_newFromStr_WithLength
+ */
+void SAL_CALL rtl_stringbuffer_newFromStr_WithLength( rtl_String ** newStr,
+                                                      const char * value,
+                                                      sal_Int32 count )
+{
+    assert(newStr);
+    assert(count >= 0);
+    if (!value)
+    {
+        rtl_string_new_WithLength( newStr, 16 );
+        return;
+    }
+
+    // use raw alloc to avoid overwriting the buffer twice
+    if ( *newStr)
+        rtl_string_release( *newStr );
+    *newStr = rtl_string_ImplAlloc( count + 16 );
+    (*newStr)->length = count;
+    memcpy( (*newStr)->buffer, value, count );
+    memset( (*newStr)->buffer + count, 0, 16 );
+}
+
+/*************************************************************************
+ *  rtl_stringbuffer_newFromStringBuffer
+ */
+sal_Int32 SAL_CALL rtl_stringbuffer_newFromStringBuffer( rtl_String ** newStr,
+                                                         sal_Int32 capacity,
+                                                         rtl_String * oldStr )
+{
+    assert(newStr);
+    assert(oldStr);
+    assert(capacity >= 0);
+    sal_Int32 newCapacity = capacity;
+
+    if (newCapacity < oldStr->length)
+        newCapacity = oldStr->length;
+
+    rtl_string_new_WithLength( newStr, newCapacity );
+    if (oldStr->length > 0) {
+        (*newStr)->length = oldStr->length;
+        memcpy( (*newStr)->buffer, oldStr->buffer, oldStr->length );
+    }
+    return newCapacity;
+}
+
+/*************************************************************************
+ *  rtl_stringbuffer_ensureCapacity
+ */
+void SAL_CALL rtl_stringbuffer_ensureCapacity
+    (rtl_String ** This, sal_Int32* capacity, sal_Int32 minimumCapacity)
+{
+    assert(This);
+//    assert(capacity && *capacity >= 0);
+//    assert(minimumCapacity >= 0);
+    if (minimumCapacity <= *capacity)
+        return;
+
+    rtl_String * pTmp = *This;
+    rtl_String * pNew = nullptr;
+    auto nLength = (*This)->length;
+    *capacity = (nLength + 1) * 2;
+    if (minimumCapacity > *capacity)
+        /* still lower, set to the minimum capacity */
+        *capacity = minimumCapacity;
+
+    // use raw alloc to avoid overwriting the buffer twice
+    pNew = rtl_string_ImplAlloc( *capacity );
+    pNew->length = nLength;
+    *This = pNew;
+
+    memcpy( (*This)->buffer, pTmp->buffer, nLength );
+    memset( (*This)->buffer + nLength, 0, *capacity - nLength );
+    rtl_string_release( pTmp );
+}
+
+/*************************************************************************
+ *  rtl_stringbuffer_insert
+ */
+void SAL_CALL rtl_stringbuffer_insert( rtl_String ** This,
+                                       sal_Int32 * capacity,
+                                       sal_Int32 offset,
+                                       const char * str,
+                                       sal_Int32 len )
+{
+    assert(This);
+    assert(capacity && *capacity >= 0);
+    assert(offset >= 0 && offset <= (**This).length);
+    assert(len >= 0);
+    sal_Int32 nOldLen;
+    char * pBuf;
+    sal_Int32 n;
+    if( len == 0 )
+        return;
+
+    if (*capacity < (*This)->length + len)
+        rtl_stringbuffer_ensureCapacity( This, capacity, (*This)->length + len );
+
+    nOldLen = (*This)->length;
+    pBuf = (*This)->buffer;
+
+    /* copy the tail */
+    n = (nOldLen - offset);
+    if( n == 1 )
+        /* optimized for 1 character */
+        pBuf[offset + len] = pBuf[offset];
+    else if( n > 1 )
+        memmove( pBuf + offset + len, pBuf + offset, n * sizeof(char) );
+
+    /* insert the new characters */
+    if( str != nullptr )
+    {
+        if( len == 1 )
+            /* optimized for 1 character */
+            pBuf[offset] = *str;
+        else
+            memcpy( pBuf + offset, str, len * sizeof(char) );
+    }
+    (*This)->length = nOldLen + len;
+    pBuf[ nOldLen + len ] = 0;
+}
+
+/*************************************************************************
+ *  rtl_stringbuffer_remove
+ */
+void SAL_CALL rtl_stringbuffer_remove( rtl_String ** This,
+                                       sal_Int32 start,
+                                       sal_Int32 len )
+{
+    assert(This);
+    assert(start >= 0 && start <= (**This).length);
+    assert(len >= 0);
+    sal_Int32 nTailLen;
+    char * pBuf;
+
+    if (len > (*This)->length - start)
+        len = (*This)->length - start;
+
+    //remove nothing
+    if (!len)
+        return;
+
+    pBuf = (*This)->buffer;
+    nTailLen = (*This)->length - ( start + len );
+
+    if (nTailLen)
+    {
+        /* move the tail */
+        memmove(pBuf + start, pBuf + start + len, nTailLen * sizeof(char));
+    }
+
+    (*This)->length-=len;
+    pBuf[ (*This)->length ] = 0;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */