runtime/third_party/jscre/pcre_ucp_searchfuncs.cpp - Issue 1071713003: - Remove JSCRE from the runtime.

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Issue 1071713003: - Remove JSCRE from the runtime. (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/

Patch Set: Created 5 years, 8 months ago

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1 /* This is JavaScriptCore's variant of the PCRE library. While this library

2 started out as a copy of PCRE, many of the features of PCRE have been

3 removed. This library now supports only the regular expression features

4 required by the JavaScript language specification, and has only the functions

5 needed by JavaScriptCore and the rest of WebKit.

6

7 Originally written by Philip Hazel

8 Copyright (c) 1997-2006 University of Cambridge

9 Copyright (C) 2002, 2004, 2006, 2007 Apple Inc. All rights reserved.

10

11 -----------------------------------------------------------------------------

12 Redistribution and use in source and binary forms, with or without

13 modification, are permitted provided that the following conditions are met:

14

15 * Redistributions of source code must retain the above copyright notice,

16 this list of conditions and the following disclaimer.

17

18 * Redistributions in binary form must reproduce the above copyright

19 notice, this list of conditions and the following disclaimer in the

20 documentation and/or other materials provided with the distribution.

21

22 * Neither the name of the University of Cambridge nor the names of its

23 contributors may be used to endorse or promote products derived from

24 this software without specific prior written permission.

25

26 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

27 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

28 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

29 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE

30 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

31 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

32 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

33 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

34 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

35 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

36 POSSIBILITY OF SUCH DAMAGE.

37 -----------------------------------------------------------------------------

38 */

39

40

41 /* This module contains code for searching the table of Unicode character

42 properties. */

43

44 #include "pcre_internal.h"

45

46 #include "ucpinternal.h" /* Internal table details */

47 #include "ucptable.cpp" /* The table itself */

48

49 namespace dart { namespace jscre {

50

51 /*************************************************

52 * Search table and return other case *

53 *************************************************/

54

55 /* If the given character is a letter, and there is another case for the

56 letter, return the other case. Otherwise, return -1.

57

58 Arguments:

59 c the character value

60

61 Returns: the other case or -1 if none

62 */

63

64 int kjs_pcre_ucp_othercase(unsigned c)

65 {

66 int bot = 0;

67 int top = sizeof(ucp_table) / sizeof(cnode);

68 int mid;

69

70 /* The table is searched using a binary chop. You might think that using

71 intermediate variables to hold some of the common expressions would speed

72 things up, but tests with gcc 3.4.4 on Linux showed that, on the contrary, it

73 makes things a lot slower. */

74

75 for (;;) {

76 if (top <= bot)

77 return -1;

78 mid = (bot + top) >> 1;

79 if (c == (ucp_table[mid].f0 & f0_charmask))

80 break;

81 if (c < (ucp_table[mid].f0 & f0_charmask))

82 top = mid;

83 else {

84 if ((ucp_table[mid].f0 & f0_rangeflag) && (c <= (ucp_table[mid].f0 & f0_charmask) + (ucp_table[mid].f1 & f1_rangemask)))

85 break;

86 bot = mid + 1;

87 }

88 }

89

90 /* Found an entry in the table. Return -1 for a range entry. Otherwise retur n

91 the other case if there is one, else -1. */

92

93 if (ucp_table[mid].f0 & f0_rangeflag)

94 return -1;

95

96 int offset = ucp_table[mid].f1 & f1_casemask;

97 if (offset & f1_caseneg)

98 offset \|= f1_caseneg;

99 return !offset ? -1 : c + offset;

100 }

101

102 } } // namespace dart::jscre

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