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      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 "StringBuilder.h"
     32 
     33 namespace JSC {
     34 
     35 class JSStringBuilder : public StringBuilder {
     36 public:
     37     JSValue build(ExecState* exec)
     38     {
     39         buffer.shrinkToFit();
     40         if (!buffer.data())
     41             return throwOutOfMemoryError(exec);
     42         return jsString(exec, UString::adopt(buffer));
     43     }
     44 
     45 private:
     46     // Make attempts to call this compile error - if you only wanted a UString,
     47     // Why didn't you just use a StringBuilder?!  (This may change, maybe at some
     48     // point in the future we'll need to start building a string not knowing whether
     49     // we'll want a UString or a JSValue - but until we have this requirement,
     50     // block this).
     51     UString build()
     52     {
     53         ASSERT_NOT_REACHED();
     54         return StringBuilder::build();
     55     }
     56 };
     57 
     58 template<typename StringType1, typename StringType2>
     59 inline JSValue jsMakeNontrivialString(ExecState* exec, StringType1 string1, StringType2 string2)
     60 {
     61     PassRefPtr<UStringImpl> result = tryMakeString(string1, string2);
     62     if (!result)
     63         return throwOutOfMemoryError(exec);
     64     return jsNontrivialString(exec, result);
     65 }
     66 
     67 template<typename StringType1, typename StringType2, typename StringType3>
     68 inline JSValue jsMakeNontrivialString(ExecState* exec, StringType1 string1, StringType2 string2, StringType3 string3)
     69 {
     70     PassRefPtr<UStringImpl> result = tryMakeString(string1, string2, string3);
     71     if (!result)
     72         return throwOutOfMemoryError(exec);
     73     return jsNontrivialString(exec, result);
     74 }
     75 
     76 template<typename StringType1, typename StringType2, typename StringType3, typename StringType4>
     77 inline JSValue jsMakeNontrivialString(ExecState* exec, StringType1 string1, StringType2 string2, StringType3 string3, StringType4 string4)
     78 {
     79     PassRefPtr<UStringImpl> result = tryMakeString(string1, string2, string3, string4);
     80     if (!result)
     81         return throwOutOfMemoryError(exec);
     82     return jsNontrivialString(exec, result);
     83 }
     84 
     85 template<typename StringType1, typename StringType2, typename StringType3, typename StringType4, typename StringType5>
     86 inline JSValue jsMakeNontrivialString(ExecState* exec, StringType1 string1, StringType2 string2, StringType3 string3, StringType4 string4, StringType5 string5)
     87 {
     88     PassRefPtr<UStringImpl> result = tryMakeString(string1, string2, string3, string4, string5);
     89     if (!result)
     90         return throwOutOfMemoryError(exec);
     91     return jsNontrivialString(exec, result);
     92 }
     93 
     94 template<typename StringType1, typename StringType2, typename StringType3, typename StringType4, typename StringType5, typename StringType6>
     95 inline JSValue jsMakeNontrivialString(ExecState* exec, StringType1 string1, StringType2 string2, StringType3 string3, StringType4 string4, StringType5 string5, StringType6 string6)
     96 {
     97     PassRefPtr<UStringImpl> result = tryMakeString(string1, string2, string3, string4, string5, string6);
     98     if (!result)
     99         return throwOutOfMemoryError(exec);
    100     return jsNontrivialString(exec, result);
    101 }
    102 
    103 }
    104 
    105 #endif
    106