/*
**********************************************************************
-* Copyright (c) 2001-2004, International Business Machines
+* Copyright (c) 2001-2008, International Business Machines
* Corporation and others. All Rights Reserved.
**********************************************************************
* Date Name Description
*/
#include "util.h"
-#include "unicode/uchar.h"
#include "unicode/unimatch.h"
-#include "uprops.h"
+#include "unicode/uniset.h"
// Define UChar constants using hex for EBCDIC compatibility
85,86,87,88,89,90
};
+U_NAMESPACE_BEGIN
+
UnicodeString& ICU_Utility::appendNumber(UnicodeString& result, int32_t n,
int32_t radix, int32_t minDigits) {
if (radix < 2 || radix > 36) {
return result;
}
-static const UChar HEX[16] = {48,49,50,51,52,53,54,55, // 0-7
- 56,57,65,66,67,68,69,70}; // 8-9 A-F
-
/**
* Return true if the character is NOT printable ASCII.
*/
result.append(BACKSLASH);
if (c & ~0xFFFF) {
result.append(UPPER_U);
- result.append(HEX[0xF&(c>>28)]);
- result.append(HEX[0xF&(c>>24)]);
- result.append(HEX[0xF&(c>>20)]);
- result.append(HEX[0xF&(c>>16)]);
+ result.append(DIGITS[0xF&(c>>28)]);
+ result.append(DIGITS[0xF&(c>>24)]);
+ result.append(DIGITS[0xF&(c>>20)]);
+ result.append(DIGITS[0xF&(c>>16)]);
} else {
result.append(LOWER_U);
}
- result.append(HEX[0xF&(c>>12)]);
- result.append(HEX[0xF&(c>>8)]);
- result.append(HEX[0xF&(c>>4)]);
- result.append(HEX[0xF&c]);
+ result.append(DIGITS[0xF&(c>>12)]);
+ result.append(DIGITS[0xF&(c>>8)]);
+ result.append(DIGITS[0xF&(c>>4)]);
+ result.append(DIGITS[0xF&c]);
return TRUE;
}
return FALSE;
return TRUE;
}
-/**
- * Parse a pattern string starting at offset pos. Keywords are
- * matched case-insensitively. Spaces may be skipped and may be
- * optional or required. Integer values may be parsed, and if
- * they are, they will be returned in the given array. If
- * successful, the offset of the next non-space character is
- * returned. On failure, -1 is returned.
- * @param pattern must only contain lowercase characters, which
- * will match their uppercase equivalents as well. A space
- * character matches one or more required spaces. A '~' character
- * matches zero or more optional spaces. A '#' character matches
- * an integer and stores it in parsedInts, which the caller must
- * ensure has enough capacity.
- * @param parsedInts array to receive parsed integers. Caller
- * must ensure that parsedInts.length is >= the number of '#'
- * signs in 'pattern'.
- * @return the position after the last character parsed, or -1 if
- * the parse failed
- */
-int32_t ICU_Utility::parsePattern(const UnicodeString& rule, int32_t pos, int32_t limit,
- const UnicodeString& pattern, int32_t* parsedInts) {
- // TODO Update this to handle surrogates
- int32_t p;
- int32_t intCount = 0; // number of integers parsed
- for (int32_t i=0; i<pattern.length(); ++i) {
- UChar cpat = pattern.charAt(i);
- UChar c;
- switch (cpat) {
- case 32 /*' '*/:
- if (pos >= limit) {
- return -1;
- }
- c = rule.charAt(pos++);
- if (!uprv_isRuleWhiteSpace(c)) {
- return -1;
- }
- // FALL THROUGH to skipWhitespace
- case 126 /*'~'*/:
- pos = skipWhitespace(rule, pos);
- break;
- case 35 /*'#'*/:
- p = pos;
- parsedInts[intCount++] = parseInteger(rule, p, limit);
- if (p == pos) {
- // Syntax error; failed to parse integer
- return -1;
- }
- pos = p;
- break;
- default:
- if (pos >= limit) {
- return -1;
- }
- c = (UChar) u_tolower(rule.charAt(pos++));
- if (c != cpat) {
- return -1;
- }
- break;
- }
- }
- return pos;
-}
-
/**
* Parse a pattern string within the given Replaceable and a parsing
* pattern. Characters are matched literally and case-sensitively
return -1; // text ended before end of pat
}
-/**
- * Parse an integer at pos, either of the form \d+ or of the form
- * 0x[0-9A-Fa-f]+ or 0[0-7]+, that is, in standard decimal, hex,
- * or octal format.
- * @param pos INPUT-OUTPUT parameter. On input, the first
- * character to parse. On output, the character after the last
- * parsed character.
- */
-int32_t ICU_Utility::parseInteger(const UnicodeString& rule, int32_t& pos, int32_t limit) {
- int32_t count = 0;
- int32_t value = 0;
- int32_t p = pos;
- int8_t radix = 10;
-
- if (p < limit && rule.charAt(p) == 48 /*0*/) {
- if (p+1 < limit && (rule.charAt(p+1) == 0x78 /*x*/ || rule.charAt(p+1) == 0x58 /*X*/)) {
- p += 2;
- radix = 16;
- }
- else {
- p++;
- count = 1;
- radix = 8;
- }
- }
-
- while (p < limit) {
- int32_t d = u_digit(rule.charAt(p++), radix);
- if (d < 0) {
- --p;
- break;
- }
- ++count;
- int32_t v = (value * radix) + d;
- if (v <= value) {
- // If there are too many input digits, at some point
- // the value will go negative, e.g., if we have seen
- // "0x8000000" already and there is another '0', when
- // we parse the next 0 the value will go negative.
- return 0;
- }
- value = v;
- }
- if (count > 0) {
- pos = p;
- }
- return value;
-}
-
-/**
- * Parse a Unicode identifier from the given string at the given
- * position. Return the identifier, or an empty string if there
- * is no identifier.
- * @param str the string to parse
- * @param pos INPUT-OUPUT parameter. On INPUT, pos is the
- * first character to examine. It must be less than str.length(),
- * and it must not point to a whitespace character. That is, must
- * have pos < str.length() and
- * !uprv_isRuleWhiteSpace(str.char32At(pos)). On
- * OUTPUT, the position after the last parsed character.
- * @return the Unicode identifier, or an empty string if there is
- * no valid identifier at pos.
- */
-UnicodeString ICU_Utility::parseUnicodeIdentifier(const UnicodeString& str, int32_t& pos) {
- // assert(pos < str.length());
- // assert(!uprv_isRuleWhiteSpace(str.char32At(pos)));
- UnicodeString buf;
- int p = pos;
- while (p < str.length()) {
- UChar32 ch = str.char32At(p);
- if (buf.length() == 0) {
- if (u_isIDStart(ch)) {
- buf.append(ch);
- } else {
- buf.truncate(0);
- return buf;
- }
- } else {
- if (u_isIDPart(ch)) {
- buf.append(ch);
- } else {
- break;
- }
- }
- p += UTF_CHAR_LENGTH(ch);
- }
- pos = p;
- return buf;
-}
-
-/**
- * Parse an unsigned 31-bit integer at the given offset. Use
- * UCharacter.digit() to parse individual characters into digits.
- * @param text the text to be parsed
- * @param pos INPUT-OUTPUT parameter. On entry, pos[0] is the
- * offset within text at which to start parsing; it should point
- * to a valid digit. On exit, pos[0] is the offset after the last
- * parsed character. If the parse failed, it will be unchanged on
- * exit. Must be >= 0 on entry.
- * @param radix the radix in which to parse; must be >= 2 and <=
- * 36.
- * @return a non-negative parsed number, or -1 upon parse failure.
- * Parse fails if there are no digits, that is, if pos[0] does not
- * point to a valid digit on entry, or if the number to be parsed
- * does not fit into a 31-bit unsigned integer.
- */
-int32_t ICU_Utility::parseNumber(const UnicodeString& text,
- int32_t& pos, int8_t radix) {
- // assert(pos[0] >= 0);
- // assert(radix >= 2);
- // assert(radix <= 36);
- int32_t n = 0;
- int32_t p = pos;
- while (p < text.length()) {
- UChar32 ch = text.char32At(p);
- int32_t d = u_digit(ch, radix);
- if (d < 0) {
- break;
- }
- n = radix*n + d;
- // ASSUME that when a 32-bit integer overflows it becomes
- // negative. E.g., 214748364 * 10 + 8 => negative value.
- if (n < 0) {
- return -1;
- }
- ++p;
- }
- if (p == pos) {
- return -1;
- }
- pos = p;
- return n;
-}
-
/**
* Append a character to a rule that is being built up. To flush
* the quoteBuf to rule, make one final call with isLiteral == TRUE.
}
}
+U_NAMESPACE_END
+
U_CAPI UBool U_EXPORT2
uprv_isRuleWhiteSpace(UChar32 c) {
/* "white space" in the sense of ICU rule parsers
This is a FIXED LIST that is NOT DEPENDENT ON UNICODE PROPERTIES.
- See UTR #31: http://www.unicode.org/reports/tr31/.
+ See UAX #31 Identifier and Pattern Syntax: http://www.unicode.org/reports/tr31/
U+0009..U+000D, U+0020, U+0085, U+200E..U+200F, and U+2028..U+2029
+ Equivalent to test for Pattern_White_Space Unicode property.
*/
return (c >= 0x0009 && c <= 0x2029 &&
(c <= 0x000D || c == 0x0020 || c == 0x0085 ||
c == 0x200E || c == 0x200F || c >= 0x2028));
}
+U_CAPI U_NAMESPACE_QUALIFIER UnicodeSet* U_EXPORT2
+uprv_openRuleWhiteSpaceSet(UErrorCode* ec) {
+ if(U_FAILURE(*ec)) {
+ return NULL;
+ }
+ // create a set with the Pattern_White_Space characters,
+ // without a pattern for fewer code dependencies
+ U_NAMESPACE_QUALIFIER UnicodeSet *set=new U_NAMESPACE_QUALIFIER UnicodeSet(9, 0xd);
+ // Check for new failure.
+ if (set == NULL) {
+ *ec = U_MEMORY_ALLOCATION_ERROR;
+ return NULL;
+ }
+ set->UnicodeSet::add(0x20).add(0x85).add(0x200e, 0x200f).add(0x2028, 0x2029);
+ return set;
+}
+
//eof
projects / apple / icu.git / blobdiff