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      1 // Copyright 2006-2008 the V8 project authors. All rights reserved.
      2 // Redistribution and use in source and binary forms, with or without
      3 // modification, are permitted provided that the following conditions are
      4 // met:
      5 //
      6 //     * Redistributions of source code must retain the above copyright
      7 //       notice, this list of conditions and the following disclaimer.
      8 //     * Redistributions in binary form must reproduce the above
      9 //       copyright notice, this list of conditions and the following
     10 //       disclaimer in the documentation and/or other materials provided
     11 //       with the distribution.
     12 //     * Neither the name of Google Inc. nor the names of its
     13 //       contributors may be used to endorse or promote products derived
     14 //       from this software without specific prior written permission.
     15 //
     16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 #ifndef V8_CHAR_PREDICATES_INL_H_
     29 #define V8_CHAR_PREDICATES_INL_H_
     30 
     31 #include "char-predicates.h"
     32 
     33 namespace v8 {
     34 namespace internal {
     35 
     36 
     37 inline bool IsCarriageReturn(uc32 c) {
     38   return c == 0x000D;
     39 }
     40 
     41 
     42 inline bool IsLineFeed(uc32 c) {
     43   return c == 0x000A;
     44 }
     45 
     46 
     47 static inline bool IsInRange(int value, int lower_limit, int higher_limit) {
     48   ASSERT(lower_limit <= higher_limit);
     49   return static_cast<unsigned int>(value - lower_limit) <=
     50       static_cast<unsigned int>(higher_limit - lower_limit);
     51 }
     52 
     53 
     54 inline bool IsDecimalDigit(uc32 c) {
     55   // ECMA-262, 3rd, 7.8.3 (p 16)
     56   return IsInRange(c, '0', '9');
     57 }
     58 
     59 
     60 inline bool IsHexDigit(uc32 c) {
     61   // ECMA-262, 3rd, 7.6 (p 15)
     62   return IsDecimalDigit(c) || IsInRange(c | 0x20, 'a', 'f');
     63 }
     64 
     65 
     66 inline bool IsRegExpWord(uc16 c) {
     67   return IsInRange(c | 0x20, 'a', 'z')
     68       || IsDecimalDigit(c)
     69       || (c == '_');
     70 }
     71 
     72 
     73 inline bool IsRegExpNewline(uc16 c) {
     74   switch (c) {
     75     //   CR           LF           LS           PS
     76     case 0x000A: case 0x000D: case 0x2028: case 0x2029:
     77       return false;
     78     default:
     79       return true;
     80   }
     81 }
     82 
     83 
     84 } }  // namespace v8::internal
     85 
     86 #endif  // V8_CHAR_PREDICATES_INL_H_
     87