зеркало из https://github.com/microsoft/clang-1.git
Convert the CharInfo table to be statically initialized, instead of dynamically initialized. Patch by Ryan Flynn!
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@74919 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
Родитель
6bec78d58b
Коммит
03b986660c
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@ -242,8 +242,6 @@ unsigned Lexer::MeasureTokenLength(SourceLocation Loc,
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// Character information.
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//===----------------------------------------------------------------------===//
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static unsigned char CharInfo[256];
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enum {
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CHAR_HORZ_WS = 0x01, // ' ', '\t', '\f', '\v'. Note, no '\0'
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CHAR_VERT_WS = 0x02, // '\r', '\n'
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@ -253,25 +251,98 @@ enum {
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CHAR_PERIOD = 0x20 // .
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};
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// Statically initialize CharInfo table based on ASCII character set
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// Reference: FreeBSD 7.2 /usr/share/misc/ascii
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static const unsigned char CharInfo[256] =
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{
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// 0 NUL 1 SOH 2 STX 3 ETX
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// 4 EOT 5 ENQ 6 ACK 7 BEL
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0 , 0 , 0 , 0 ,
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0 , 0 , 0 , 0 ,
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// 8 BS 9 HT 10 NL 11 VT
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//12 NP 13 CR 14 SO 15 SI
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0 , CHAR_HORZ_WS, CHAR_VERT_WS, CHAR_HORZ_WS,
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CHAR_HORZ_WS, CHAR_VERT_WS, 0 , 0 ,
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//16 DLE 17 DC1 18 DC2 19 DC3
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//20 DC4 21 NAK 22 SYN 23 ETB
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0 , 0 , 0 , 0 ,
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0 , 0 , 0 , 0 ,
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//24 CAN 25 EM 26 SUB 27 ESC
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//28 FS 29 GS 30 RS 31 US
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0 , 0 , 0 , 0 ,
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0 , 0 , 0 , 0 ,
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//32 SP 33 ! 34 " 35 #
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//36 $ 37 % 38 & 39 '
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CHAR_HORZ_WS, 0 , 0 , 0 ,
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0 , 0 , 0 , 0 ,
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//40 ( 41 ) 42 * 43 +
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//44 , 45 - 46 . 47 /
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0 , 0 , 0 , 0 ,
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0 , 0 , CHAR_PERIOD , 0 ,
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//48 0 49 1 50 2 51 3
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//52 4 53 5 54 6 55 7
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CHAR_NUMBER , CHAR_NUMBER , CHAR_NUMBER , CHAR_NUMBER ,
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CHAR_NUMBER , CHAR_NUMBER , CHAR_NUMBER , CHAR_NUMBER ,
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//56 8 57 9 58 : 59 ;
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//60 < 61 = 62 > 63 ?
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CHAR_NUMBER , CHAR_NUMBER , 0 , 0 ,
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0 , 0 , 0 , 0 ,
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//64 @ 65 A 66 B 67 C
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//68 D 69 E 70 F 71 G
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0 , CHAR_LETTER , CHAR_LETTER , CHAR_LETTER ,
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CHAR_LETTER , CHAR_LETTER , CHAR_LETTER , CHAR_LETTER ,
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//72 H 73 I 74 J 75 K
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//76 L 77 M 78 N 79 O
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CHAR_LETTER , CHAR_LETTER , CHAR_LETTER , CHAR_LETTER ,
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CHAR_LETTER , CHAR_LETTER , CHAR_LETTER , CHAR_LETTER ,
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//80 P 81 Q 82 R 83 S
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//84 T 85 U 86 V 87 W
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CHAR_LETTER , CHAR_LETTER , CHAR_LETTER , CHAR_LETTER ,
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CHAR_LETTER , CHAR_LETTER , CHAR_LETTER , CHAR_LETTER ,
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//88 X 89 Y 90 Z 91 [
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//92 \ 93 ] 94 ^ 95 _
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CHAR_LETTER , CHAR_LETTER , CHAR_LETTER , 0 ,
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0 , 0 , 0 , CHAR_UNDER ,
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//96 ` 97 a 98 b 99 c
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//100 d 101 e 102 f 103 g
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0 , CHAR_LETTER , CHAR_LETTER , CHAR_LETTER ,
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CHAR_LETTER , CHAR_LETTER , CHAR_LETTER , CHAR_LETTER ,
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//104 h 105 i 106 j 107 k
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//108 l 109 m 110 n 111 o
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CHAR_LETTER , CHAR_LETTER , CHAR_LETTER , CHAR_LETTER ,
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CHAR_LETTER , CHAR_LETTER , CHAR_LETTER , CHAR_LETTER ,
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//112 p 113 q 114 r 115 s
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//116 t 117 u 118 v 119 w
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CHAR_LETTER , CHAR_LETTER , CHAR_LETTER , CHAR_LETTER ,
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CHAR_LETTER , CHAR_LETTER , CHAR_LETTER , CHAR_LETTER ,
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//120 x 121 y 122 z 123 {
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//124 | 125 } 126 ~ 127 DEL
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CHAR_LETTER , CHAR_LETTER , CHAR_LETTER , 0 ,
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0 , 0 , 0 , 0
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};
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static void InitCharacterInfo() {
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static bool isInited = false;
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if (isInited) return;
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isInited = true;
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// Intiialize the CharInfo table.
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// TODO: statically initialize this.
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CharInfo[(int)' '] = CharInfo[(int)'\t'] =
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CharInfo[(int)'\f'] = CharInfo[(int)'\v'] = CHAR_HORZ_WS;
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CharInfo[(int)'\n'] = CharInfo[(int)'\r'] = CHAR_VERT_WS;
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CharInfo[(int)'_'] = CHAR_UNDER;
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CharInfo[(int)'.'] = CHAR_PERIOD;
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for (unsigned i = 'a'; i <= 'z'; ++i)
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CharInfo[i] = CharInfo[i+'A'-'a'] = CHAR_LETTER;
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// check the statically-initialized CharInfo table
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assert(CHAR_HORZ_WS == CharInfo[(int)' ']);
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assert(CHAR_HORZ_WS == CharInfo[(int)'\t']);
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assert(CHAR_HORZ_WS == CharInfo[(int)'\f']);
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assert(CHAR_HORZ_WS == CharInfo[(int)'\v']);
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assert(CHAR_VERT_WS == CharInfo[(int)'\n']);
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assert(CHAR_VERT_WS == CharInfo[(int)'\r']);
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assert(CHAR_UNDER == CharInfo[(int)'_']);
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assert(CHAR_PERIOD == CharInfo[(int)'.']);
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for (unsigned i = 'a'; i <= 'z'; ++i) {
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assert(CHAR_LETTER == CharInfo[i]);
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assert(CHAR_LETTER == CharInfo[i+'A'-'a']);
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}
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for (unsigned i = '0'; i <= '9'; ++i)
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CharInfo[i] = CHAR_NUMBER;
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assert(CHAR_NUMBER == CharInfo[i]);
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isInited = true;
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}
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/// isIdentifierBody - Return true if this is the body character of an
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/// identifier, which is [a-zA-Z0-9_].
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static inline bool isIdentifierBody(unsigned char c) {
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