1 /*

     2  * Copyright (C) 2009 Apple Inc. All rights reserved.

     3  *

     4  * Redistribution and use in source and binary forms, with or without

     5  * modification, are permitted provided that the following conditions

     6  * are met:

     7  * 1. Redistributions of source code must retain the above copyright

     8  *    notice, this list of conditions and the following disclaimer.

     9  * 2. Redistributions in binary form must reproduce the above copyright

    10  *    notice, this list of conditions and the following disclaimer in the

    11  *    documentation and/or other materials provided with the distribution.

    12  *

    13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY

    14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR

    17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

    18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

    19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

    20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

    21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

    23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

    24  */

    25 

    26 #ifndef JSStringBuilder_h

    27 #define JSStringBuilder_h

    28 

    29 #include "ExceptionHelpers.h"

    30 #include "JSString.h"

    31 #include "Vector.h"

    32 

    33 namespace JSC {

    34 

    35 class JSStringBuilder {

    36 public:

    37     JSStringBuilder()

    38         : m_okay(true)

    39     {

    40     }

    41 

    42     void append(const UChar u)

    43     {

    44         m_okay &= buffer.tryAppend(&u, 1);

    45     }

    46 

    47     void append(const char* str)

    48     {

    49         append(str, strlen(str));

    50     }

    51 

    52     void append(const char* str, size_t len)

    53     {

    54         m_okay &= buffer.tryReserveCapacity(buffer.size() + len);

    55         for (size_t i = 0; i < len; i++) {

    56             UChar u = static_cast<unsigned char>(str[i]);

    57             m_okay &= buffer.tryAppend(&u, 1);

    58         }

    59     }

    60 

    61     void append(const UChar* str, size_t len)

    62     {

    63         m_okay &= buffer.tryAppend(str, len);

    64     }

    65 

    66     void append(const UString& str)

    67     {

    68         m_okay &= buffer.tryAppend(str.data(), str.size());

    69     }

    70 

    71     JSValue build(ExecState* exec)

    72     {

    73         if (!m_okay)

    74             return throwOutOfMemoryError(exec);

    75         buffer.shrinkToFit();

    76         if (!buffer.data())

    77             return throwOutOfMemoryError(exec);

    78         return jsString(exec, UString::adopt(buffer));

    79     }

    80 

    81 protected:

    82     Vector<UChar, 64> buffer;

    83     bool m_okay;

    84 };

    85 

    86 template<typename StringType1, typename StringType2>

    87 inline JSValue jsMakeNontrivialString(ExecState* exec, StringType1 string1, StringType2 string2)

    88 {

    89     PassRefPtr<UStringImpl> result = tryMakeString(string1, string2);

    90     if (!result)

    91         return throwOutOfMemoryError(exec);

    92     return jsNontrivialString(exec, result);

    93 }

    94 

    95 template<typename StringType1, typename StringType2, typename StringType3>

    96 inline JSValue jsMakeNontrivialString(ExecState* exec, StringType1 string1, StringType2 string2, StringType3 string3)

    97 {

    98     PassRefPtr<UStringImpl> result = tryMakeString(string1, string2, string3);

    99     if (!result)

   100         return throwOutOfMemoryError(exec);

   101     return jsNontrivialString(exec, result);

   102 }

   103 

   104 template<typename StringType1, typename StringType2, typename StringType3, typename StringType4>

   105 inline JSValue jsMakeNontrivialString(ExecState* exec, StringType1 string1, StringType2 string2, StringType3 string3, StringType4 string4)

   106 {

   107     PassRefPtr<UStringImpl> result = tryMakeString(string1, string2, string3, string4);

   108     if (!result)

   109         return throwOutOfMemoryError(exec);

   110     return jsNontrivialString(exec, result);

   111 }

   112 

   113 template<typename StringType1, typename StringType2, typename StringType3, typename StringType4, typename StringType5>

   114 inline JSValue jsMakeNontrivialString(ExecState* exec, StringType1 string1, StringType2 string2, StringType3 string3, StringType4 string4, StringType5 string5)

   115 {

   116     PassRefPtr<UStringImpl> result = tryMakeString(string1, string2, string3, string4, string5);

   117     if (!result)

   118         return throwOutOfMemoryError(exec);

   119     return jsNontrivialString(exec, result);

   120 }

   121 

   122 template<typename StringType1, typename StringType2, typename StringType3, typename StringType4, typename StringType5, typename StringType6>

   123 inline JSValue jsMakeNontrivialString(ExecState* exec, StringType1 string1, StringType2 string2, StringType3 string3, StringType4 string4, StringType5 string5, StringType6 string6)

   124 {

   125     PassRefPtr<UStringImpl> result = tryMakeString(string1, string2, string3, string4, string5, string6);

   126     if (!result)

   127         return throwOutOfMemoryError(exec);

   128     return jsNontrivialString(exec, result);

   129 }

   130 

   131 }

   132 

   133 #endif