246 lines
8.9 KiB
C++
246 lines
8.9 KiB
C++
//
|
|
// regexst.h
|
|
//
|
|
// Copyright (C) 2003, International Business Machines Corporation and others.
|
|
// All Rights Reserved.
|
|
//
|
|
// This file contains class RegexStaticSets
|
|
//
|
|
// This class is internal to the regular expression implementation.
|
|
// For the public Regular Expression API, see the file "unicode/regex.h"
|
|
//
|
|
// RegexStaticSets groups together the common UnicodeSets that are needed
|
|
// for compiling or executing RegularExpressions. This grouping simplifies
|
|
// the thread safe lazy creation and sharing of these sets across
|
|
// all instances of regular expressions.
|
|
//
|
|
#include "unicode/utypes.h"
|
|
|
|
#if !UCONFIG_NO_REGULAR_EXPRESSIONS
|
|
|
|
#include "unicode/unistr.h"
|
|
#include "unicode/uniset.h"
|
|
#include "unicode/uchar.h"
|
|
#include "unicode/regex.h"
|
|
#include "uprops.h"
|
|
#include "cmemory.h"
|
|
#include "cstring.h"
|
|
#include "uassert.h"
|
|
#include "ucln_in.h"
|
|
#include "umutex.h"
|
|
|
|
#include "regexcst.h" // Contains state table for the regex pattern parser.
|
|
// generated by a Perl script.
|
|
#include "regexst.h"
|
|
|
|
|
|
|
|
U_NAMESPACE_BEGIN
|
|
|
|
|
|
//----------------------------------------------------------------------------------------
|
|
//
|
|
// Unicode Set pattern strings for all of the required constant sets.
|
|
// Initialized with hex values for portability to EBCDIC based machines.
|
|
// Really ugly, but there's no good way to avoid it.
|
|
//
|
|
//----------------------------------------------------------------------------------------
|
|
|
|
// "Rule Char" Characters are those with no special meaning, and therefore do not
|
|
// need to be escaped to appear as literals in a regexp. Expressed
|
|
// as the inverse of those needing escaping -- [^\*\?\+\[\(\)\{\}\^\$\|\\\.]
|
|
static const UChar gRuleSet_rule_char_pattern[] = {
|
|
// [ ^ \ * \ ? \ + \ [ \ ( / )
|
|
0x5b, 0x5e, 0x5c, 0x2a, 0x5c, 0x3f, 0x5c, 0x2b, 0x5c, 0x5b, 0x5c, 0x28, 0x5c, 0x29,
|
|
// \ { \ } \ ^ \ $ \ | \ \ \ . ]
|
|
0x5c, 0x7b,0x5c, 0x7d, 0x5c, 0x5e, 0x5c, 0x24, 0x5c, 0x7c, 0x5c, 0x5c, 0x5c, 0x2e, 0x5d, 0};
|
|
|
|
|
|
static const UChar gRuleSet_digit_char_pattern[] = {
|
|
// [ 0 - 9 ]
|
|
0x5b, 0x30, 0x2d, 0x39, 0x5d, 0};
|
|
static const UnicodeSet *gRuleDigits = NULL;
|
|
|
|
|
|
|
|
//
|
|
// Here are the backslash escape characters that ICU's unescape() function
|
|
// will handle.
|
|
//
|
|
static const UChar gUnescapeCharPattern[] = {
|
|
// [ a c e f n r t u U x ]
|
|
0x5b, 0x61, 0x63, 0x65, 0x66, 0x6e, 0x72, 0x74, 0x75, 0x55, 0x78, 0x5d, 0};
|
|
|
|
|
|
//
|
|
// White space characters that may appear within a pattern in free-form mode
|
|
//
|
|
static const UChar gRuleWhiteSpacePattern[] = {
|
|
/* "[[:Cf:][:WSpace:]]" */
|
|
91, 91, 58, 67, 102, 58, 93, 91, 58, 87,
|
|
83, 112, 97, 99, 101, 58, 93, 93, 0 };
|
|
|
|
|
|
|
|
//
|
|
// Unicode Set Definitions for Regular Expression \w
|
|
//
|
|
static const UChar gIsWordPattern[] = {
|
|
// [ \ p { L l } \ p { L u }
|
|
0x5b, 0x5c, 0x70, 0x7b, 0x4c, 0x6c, 0x7d, 0x5c, 0x70, 0x7b, 0x4c, 0x75, 0x7d,
|
|
// \ p { L t } \ p { L o }
|
|
0x5c, 0x70, 0x7b, 0x4c, 0x74, 0x7d, 0x5c, 0x70, 0x7b, 0x4c, 0x6f, 0x7d,
|
|
// \ p { N d } _ ]
|
|
0x5c, 0x70, 0x7b, 0x4e, 0x64, 0x7d, 0x5f, 0x5d, 0};
|
|
|
|
|
|
//
|
|
// Unicode Set Definitions for Regular Expression \s
|
|
//
|
|
static const UChar gIsSpacePattern[] = {
|
|
// [ \ t \ n \ f \ r \ p { Z } ]
|
|
0x5b, 0x5c, 0x74, 0x5c, 0x6e, 0x5c, 0x66, 0x5c, 0x72, 0x5c, 0x70, 0x7b, 0x5a, 0x7d, 0x5d, 0};
|
|
|
|
|
|
//
|
|
// UnicodeSets used in implementation of Grapheme Cluster detection, \X
|
|
//
|
|
static const UChar gGC_ControlPattern[] = {
|
|
// [ [ : Z l : ] [ : Z p : ]
|
|
0x5b, 0x5b, 0x3a, 0x5A, 0x6c, 0x3a, 0x5d, 0x5b, 0x3a, 0x5A, 0x70, 0x3a, 0x5d,
|
|
// [ : C c : ] [ : C f : ] ]
|
|
0x5b, 0x3a, 0x43, 0x63, 0x3a, 0x5d, 0x5b, 0x3a, 0x43, 0x66, 0x3a, 0x5d, 0x5d, 0};
|
|
|
|
static const UChar gGC_ExtendPattern[] = {
|
|
// [ [ : M n : ] [ : M e : ]
|
|
0x5b, 0x5b, 0x3a, 0x4d, 0x6e, 0x3a, 0x5d, 0x5b, 0x3a, 0x4d, 0x65, 0x3a, 0x5d,
|
|
// \ u f f 9 e - \ u f f 9 f ]
|
|
0x5c, 0x75, 0x66, 0x66, 0x39, 0x65, 0x2d, 0x5c, 0x75, 0x66, 0x66, 0x39, 0x66, 0x5d, 0};
|
|
|
|
static const UChar gGC_LPattern[] = {
|
|
// [ \ u 1 1 0 0 - \ u 1 1 5 f ]
|
|
0x5b, 0x5c, 0x75, 0x31, 0x31, 0x30, 0x30, 0x2d, 0x5c, 0x75, 0x31, 0x31, 0x35, 0x66, 0x5d, 0};
|
|
|
|
static const UChar gGC_VPattern[] = {
|
|
// [ \ u 1 1 6 0 - \ u 1 1 a 2 ]
|
|
0x5b, 0x5c, 0x75, 0x31, 0x31, 0x36, 0x30, 0x2d, 0x5c, 0x75, 0x31, 0x31, 0x61, 0x32, 0x5d, 0};
|
|
|
|
static const UChar gGC_TPattern[] = {
|
|
// [ \ u 1 1 a 8 - \ u 1 1 f 9 ]
|
|
0x5b, 0x5c, 0x75, 0x31, 0x31, 0x61, 0x38, 0x2d, 0x5c, 0x75, 0x31, 0x31, 0x66, 0x39, 0x5d, 0};
|
|
|
|
|
|
|
|
RegexStaticSets::RegexStaticSets(UErrorCode *status) {
|
|
// First zero out everything
|
|
int i;
|
|
for (i=0; i<URX_LAST_SET; i++) {
|
|
fPropSets[i] = NULL;
|
|
}
|
|
for (i=0; i<10; i++) {
|
|
fRuleSets[i] = NULL;
|
|
}
|
|
fUnescapeCharSet = NULL;
|
|
|
|
// Then init the sets to their correct values.
|
|
fPropSets[URX_ISWORD_SET] = new UnicodeSet(gIsWordPattern, *status);
|
|
fPropSets[URX_ISSPACE_SET] = new UnicodeSet(gIsSpacePattern, *status);
|
|
fPropSets[URX_GC_EXTEND] = new UnicodeSet(gGC_ExtendPattern, *status);
|
|
fPropSets[URX_GC_CONTROL] = new UnicodeSet(gGC_ControlPattern, *status);
|
|
fPropSets[URX_GC_L] = new UnicodeSet(gGC_LPattern, *status);
|
|
fPropSets[URX_GC_V] = new UnicodeSet(gGC_VPattern, *status);
|
|
fPropSets[URX_GC_T] = new UnicodeSet(gGC_TPattern, *status);
|
|
|
|
|
|
|
|
//
|
|
// The following sets are dynamically constructed, because their
|
|
// intialization strings would be unreasonable.
|
|
//
|
|
|
|
|
|
//
|
|
// "Normal" is the set of characters that don't need special handling
|
|
// when finding grapheme cluster boundaries.
|
|
//
|
|
fPropSets[URX_GC_NORMAL] = new UnicodeSet;
|
|
fPropSets[URX_GC_NORMAL]->complement();
|
|
fPropSets[URX_GC_NORMAL]->remove(0xac00, 0xd7a4);
|
|
fPropSets[URX_GC_NORMAL]->removeAll(*fPropSets[URX_GC_CONTROL]);
|
|
fPropSets[URX_GC_NORMAL]->removeAll(*fPropSets[URX_GC_L]);
|
|
fPropSets[URX_GC_NORMAL]->removeAll(*fPropSets[URX_GC_V]);
|
|
fPropSets[URX_GC_NORMAL]->removeAll(*fPropSets[URX_GC_T]);
|
|
|
|
|
|
// The Precomposed Hangul syllables have the range of 0xac00 - 0xd7a3.
|
|
// Categorize these as LV or LVT, using the decomposition algorithm from
|
|
// the Unicode Standard 3.0, section 3.11
|
|
fPropSets[URX_GC_LV] = new UnicodeSet;
|
|
fPropSets[URX_GC_LVT] = new UnicodeSet;
|
|
const int32_t TCount = 28;
|
|
UChar c;
|
|
for (c=0xac00; c<0xd7a4; c+=TCount) {
|
|
fPropSets[URX_GC_LV]->add(c);
|
|
}
|
|
fPropSets[URX_GC_LVT]->add(0xac00, 0xd7a3);
|
|
fPropSets[URX_GC_LVT]->removeAll(*fPropSets[URX_GC_LV]);
|
|
|
|
|
|
// Initialize the 8-bit fast bit sets from the parallel full
|
|
// UnicodeSets.
|
|
for (i=0; i<URX_LAST_SET; i++) {
|
|
fPropSets8[i].init(fPropSets[i]);
|
|
}
|
|
|
|
// Sets used while parsing rules, but not referenced from the parse state table
|
|
fRuleSets[kRuleSet_rule_char-128] = new UnicodeSet(gRuleSet_rule_char_pattern, *status);
|
|
fRuleSets[kRuleSet_white_space-128] = new UnicodeSet(gRuleWhiteSpacePattern, *status);
|
|
fRuleSets[kRuleSet_digit_char-128] = new UnicodeSet(gRuleSet_digit_char_pattern, *status);
|
|
fRuleDigits = new UnicodeSet(gRuleSet_digit_char_pattern, *status);
|
|
fUnescapeCharSet = new UnicodeSet(gUnescapeCharPattern, *status);
|
|
|
|
};
|
|
|
|
|
|
RegexStaticSets::~RegexStaticSets() {
|
|
int i;
|
|
|
|
for (i=0; i<URX_LAST_SET; i++) {
|
|
delete fPropSets[i];
|
|
fPropSets[i] = NULL;
|
|
}
|
|
for (i=0; i<10; i++) {
|
|
delete fRuleSets[i];
|
|
fRuleSets[i] = NULL;
|
|
}
|
|
delete fUnescapeCharSet;
|
|
fUnescapeCharSet = NULL;
|
|
delete fRuleDigits;
|
|
fRuleDigits = NULL;
|
|
};
|
|
|
|
|
|
void RegexStaticSets::initGlobals(RegexStaticSets **globals, UErrorCode *status) {
|
|
umtx_lock(NULL);
|
|
RegexStaticSets *p = *globals;
|
|
umtx_unlock(NULL);
|
|
if (p == NULL) {
|
|
p = new RegexStaticSets(status);
|
|
if (U_FAILURE(*status)) {
|
|
return;
|
|
}
|
|
umtx_lock(NULL);
|
|
if (*globals == NULL) {
|
|
*globals = p;
|
|
p = NULL;
|
|
}
|
|
umtx_unlock(NULL);
|
|
delete p;
|
|
ucln_i18n_registerCleanup();
|
|
}
|
|
}
|
|
|
|
|
|
U_NAMESPACE_END
|
|
#endif // !UCONFIG_NO_REGULAR_EXPRESSIONS
|