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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+* Copyright (C) 2004-2012, International Business Machines
+* Corporation and others. All Rights Reserved.
+*
+*******************************************************************************
+* file name: ucase.h
+* encoding: US-ASCII
+* tab size: 8 (not used)
+* indentation:4
+*
+* created on: 2004aug30
+* created by: Markus W. Scherer
+*
+* Low-level Unicode character/string case mapping code.
+*/
+
+#ifndef __UCASE_H__
+#define __UCASE_H__
+
+#include "unicode/utypes.h"
+#include "unicode/uset.h"
+#include "putilimp.h"
+#include "uset_imp.h"
+#include "udataswp.h"
+
+#ifdef __cplusplus
+U_NAMESPACE_BEGIN
+
+class UnicodeString;
+
+U_NAMESPACE_END
+#endif
+
+/* library API -------------------------------------------------------------- */
+
+U_CDECL_BEGIN
+
+struct UCaseProps;
+typedef struct UCaseProps UCaseProps;
+
+U_CDECL_END
+
+U_CAPI const UCaseProps * U_EXPORT2
+ucase_getSingleton(void);
+
+U_CFUNC void U_EXPORT2
+ucase_addPropertyStarts(const UCaseProps *csp, const USetAdder *sa, UErrorCode *pErrorCode);
+
+/**
+ * Requires non-NULL locale ID but otherwise does the equivalent of
+ * checking for language codes as if uloc_getLanguage() were called:
+ * Accepts both 2- and 3-letter codes and accepts case variants.
+ */
+U_CFUNC int32_t
+ucase_getCaseLocale(const char *locale, int32_t *locCache);
+
+/* Casing locale types for ucase_getCaseLocale */
+enum {
+ UCASE_LOC_UNKNOWN,
+ UCASE_LOC_ROOT,
+ UCASE_LOC_TURKISH,
+ UCASE_LOC_LITHUANIAN,
+ UCASE_LOC_GREEK,
+ UCASE_LOC_DUTCH
+};
+
+/**
+ * Bit mask for getting just the options from a string compare options word
+ * that are relevant for case-insensitive string comparison.
+ * See uchar.h. Also include _STRNCMP_STYLE and U_COMPARE_CODE_POINT_ORDER.
+ * @internal
+ */
+#define _STRCASECMP_OPTIONS_MASK 0xffff
+
+/**
+ * Bit mask for getting just the options from a string compare options word
+ * that are relevant for case folding (of a single string or code point).
+ * See uchar.h.
+ * @internal
+ */
+#define _FOLD_CASE_OPTIONS_MASK 0xff
+
+/* single-code point functions */
+
+U_CAPI UChar32 U_EXPORT2
+ucase_tolower(const UCaseProps *csp, UChar32 c);
+
+U_CAPI UChar32 U_EXPORT2
+ucase_toupper(const UCaseProps *csp, UChar32 c);
+
+U_CAPI UChar32 U_EXPORT2
+ucase_totitle(const UCaseProps *csp, UChar32 c);
+
+U_CAPI UChar32 U_EXPORT2
+ucase_fold(const UCaseProps *csp, UChar32 c, uint32_t options);
+
+/**
+ * Adds all simple case mappings and the full case folding for c to sa,
+ * and also adds special case closure mappings.
+ * c itself is not added.
+ * For example, the mappings
+ * - for s include long s
+ * - for sharp s include ss
+ * - for k include the Kelvin sign
+ */
+U_CFUNC void U_EXPORT2
+ucase_addCaseClosure(const UCaseProps *csp, UChar32 c, const USetAdder *sa);
+
+/**
+ * Maps the string to single code points and adds the associated case closure
+ * mappings.
+ * The string is mapped to code points if it is their full case folding string.
+ * In other words, this performs a reverse full case folding and then
+ * adds the case closure items of the resulting code points.
+ * If the string is found and its closure applied, then
+ * the string itself is added as well as part of its code points' closure.
+ * It must be length>=0.
+ *
+ * @return TRUE if the string was found
+ */
+U_CFUNC UBool U_EXPORT2
+ucase_addStringCaseClosure(const UCaseProps *csp, const UChar *s, int32_t length, const USetAdder *sa);
+
+#ifdef __cplusplus
+U_NAMESPACE_BEGIN
+
+/**
+ * Iterator over characters with more than one code point in the full default Case_Folding.
+ */
+class U_COMMON_API FullCaseFoldingIterator {
+public:
+ /** Constructor. */
+ FullCaseFoldingIterator();
+ /**
+ * Returns the next (cp, full) pair where "full" is cp's full default Case_Folding.
+ * Returns a negative cp value at the end of the iteration.
+ */
+ UChar32 next(UnicodeString &full);
+private:
+ FullCaseFoldingIterator(const FullCaseFoldingIterator &); // no copy
+ FullCaseFoldingIterator &operator=(const FullCaseFoldingIterator &); // no assignment
+
+ const UChar *unfold;
+ int32_t unfoldRows;
+ int32_t unfoldRowWidth;
+ int32_t unfoldStringWidth;
+ int32_t currentRow;
+ int32_t rowCpIndex;
+};
+
+U_NAMESPACE_END
+#endif
+
+/** @return UCASE_NONE, UCASE_LOWER, UCASE_UPPER, UCASE_TITLE */
+U_CAPI int32_t U_EXPORT2
+ucase_getType(const UCaseProps *csp, UChar32 c);
+
+/** @return like ucase_getType() but also sets UCASE_IGNORABLE if c is case-ignorable */
+U_CAPI int32_t U_EXPORT2
+ucase_getTypeOrIgnorable(const UCaseProps *csp, UChar32 c);
+
+U_CAPI UBool U_EXPORT2
+ucase_isSoftDotted(const UCaseProps *csp, UChar32 c);
+
+U_CAPI UBool U_EXPORT2
+ucase_isCaseSensitive(const UCaseProps *csp, UChar32 c);
+
+/* string case mapping functions */
+
+U_CDECL_BEGIN
+
+/**
+ * Iterator function for string case mappings, which need to look at the
+ * context (surrounding text) of a given character for conditional mappings.
+ *
+ * The iterator only needs to go backward or forward away from the
+ * character in question. It does not use any indexes on this interface.
+ * It does not support random access or an arbitrary change of
+ * iteration direction.
+ *
+ * The code point being case-mapped itself is never returned by
+ * this iterator.
+ *
+ * @param context A pointer to the iterator's working data.
+ * @param dir If <0 then start iterating backward from the character;
+ * if >0 then start iterating forward from the character;
+ * if 0 then continue iterating in the current direction.
+ * @return Next code point, or <0 when the iteration is done.
+ */
+typedef UChar32 U_CALLCONV
+UCaseContextIterator(void *context, int8_t dir);
+
+/**
+ * Sample struct which may be used by some implementations of
+ * UCaseContextIterator.
+ */
+struct UCaseContext {
+ void *p;
+ int32_t start, index, limit;
+ int32_t cpStart, cpLimit;
+ int8_t dir;
+ int8_t b1, b2, b3;
+};
+typedef struct UCaseContext UCaseContext;
+
+U_CDECL_END
+
+#define UCASECONTEXT_INITIALIZER { NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
+
+enum {
+ /**
+ * For string case mappings, a single character (a code point) is mapped
+ * either to itself (in which case in-place mapping functions do nothing),
+ * or to another single code point, or to a string.
+ * Aside from the string contents, these are indicated with a single int32_t
+ * value as follows:
+ *
+ * Mapping to self: Negative values (~self instead of -self to support U+0000)
+ *
+ * Mapping to another code point: Positive values >UCASE_MAX_STRING_LENGTH
+ *
+ * Mapping to a string: The string length (0..UCASE_MAX_STRING_LENGTH) is
+ * returned. Note that the string result may indeed have zero length.
+ */
+ UCASE_MAX_STRING_LENGTH=0x1f
+};
+
+/**
+ * Get the full lowercase mapping for c.
+ *
+ * @param csp Case mapping properties.
+ * @param c Character to be mapped.
+ * @param iter Character iterator, used for context-sensitive mappings.
+ * See UCaseContextIterator for details.
+ * If iter==NULL then a context-independent result is returned.
+ * @param context Pointer to be passed into iter.
+ * @param pString If the mapping result is a string, then the pointer is
+ * written to *pString.
+ * @param locale Locale ID for locale-dependent mappings.
+ * @param locCache Initialize to 0; may be used to cache the result of parsing
+ * the locale ID for subsequent calls.
+ * Can be NULL.
+ * @return Output code point or string length, see UCASE_MAX_STRING_LENGTH.
+ *
+ * @see UCaseContextIterator
+ * @see UCASE_MAX_STRING_LENGTH
+ * @internal
+ */
+U_CAPI int32_t U_EXPORT2
+ucase_toFullLower(const UCaseProps *csp, UChar32 c,
+ UCaseContextIterator *iter, void *context,
+ const UChar **pString,
+ const char *locale, int32_t *locCache);
+
+U_CAPI int32_t U_EXPORT2
+ucase_toFullUpper(const UCaseProps *csp, UChar32 c,
+ UCaseContextIterator *iter, void *context,
+ const UChar **pString,
+ const char *locale, int32_t *locCache);
+
+U_CAPI int32_t U_EXPORT2
+ucase_toFullTitle(const UCaseProps *csp, UChar32 c,
+ UCaseContextIterator *iter, void *context,
+ const UChar **pString,
+ const char *locale, int32_t *locCache);
+
+U_CAPI int32_t U_EXPORT2
+ucase_toFullFolding(const UCaseProps *csp, UChar32 c,
+ const UChar **pString,
+ uint32_t options);
+
+U_CFUNC int32_t U_EXPORT2
+ucase_hasBinaryProperty(UChar32 c, UProperty which);
+
+
+U_CDECL_BEGIN
+
+/**
+ * @internal
+ */
+typedef int32_t U_CALLCONV
+UCaseMapFull(const UCaseProps *csp, UChar32 c,
+ UCaseContextIterator *iter, void *context,
+ const UChar **pString,
+ const char *locale, int32_t *locCache);
+
+U_CDECL_END
+
+/* file definitions --------------------------------------------------------- */
+
+#define UCASE_DATA_NAME "ucase"
+#define UCASE_DATA_TYPE "icu"
+
+/* format "cAsE" */
+#define UCASE_FMT_0 0x63
+#define UCASE_FMT_1 0x41
+#define UCASE_FMT_2 0x53
+#define UCASE_FMT_3 0x45
+
+/* indexes into indexes[] */
+enum {
+ UCASE_IX_INDEX_TOP,
+ UCASE_IX_LENGTH,
+ UCASE_IX_TRIE_SIZE,
+ UCASE_IX_EXC_LENGTH,
+ UCASE_IX_UNFOLD_LENGTH,
+
+ UCASE_IX_MAX_FULL_LENGTH=15,
+ UCASE_IX_TOP=16
+};
+
+/* definitions for 16-bit case properties word ------------------------------ */
+
+/* 2-bit constants for types of cased characters */
+#define UCASE_TYPE_MASK 3
+enum {
+ UCASE_NONE,
+ UCASE_LOWER,
+ UCASE_UPPER,
+ UCASE_TITLE
+};
+
+#define UCASE_GET_TYPE(props) ((props)&UCASE_TYPE_MASK)
+#define UCASE_GET_TYPE_AND_IGNORABLE(props) ((props)&7)
+
+#define UCASE_IGNORABLE 4
+#define UCASE_SENSITIVE 8
+#define UCASE_EXCEPTION 0x10
+
+#define UCASE_DOT_MASK 0x60
+enum {
+ UCASE_NO_DOT=0, /* normal characters with cc=0 */
+ UCASE_SOFT_DOTTED=0x20, /* soft-dotted characters with cc=0 */
+ UCASE_ABOVE=0x40, /* "above" accents with cc=230 */
+ UCASE_OTHER_ACCENT=0x60 /* other accent character (0<cc!=230) */
+};
+
+/* no exception: bits 15..7 are a 9-bit signed case mapping delta */
+#define UCASE_DELTA_SHIFT 7
+#define UCASE_DELTA_MASK 0xff80
+#define UCASE_MAX_DELTA 0xff
+#define UCASE_MIN_DELTA (-UCASE_MAX_DELTA-1)
+
+#if U_SIGNED_RIGHT_SHIFT_IS_ARITHMETIC
+# define UCASE_GET_DELTA(props) ((int16_t)(props)>>UCASE_DELTA_SHIFT)
+#else
+# define UCASE_GET_DELTA(props) (int16_t)(((props)&0x8000) ? (((props)>>UCASE_DELTA_SHIFT)|0xfe00) : ((uint16_t)(props)>>UCASE_DELTA_SHIFT))
+#endif
+
+/* exception: bits 15..5 are an unsigned 11-bit index into the exceptions array */
+#define UCASE_EXC_SHIFT 5
+#define UCASE_EXC_MASK 0xffe0
+#define UCASE_MAX_EXCEPTIONS ((UCASE_EXC_MASK>>UCASE_EXC_SHIFT)+1)
+
+/* definitions for 16-bit main exceptions word ------------------------------ */
+
+/* first 8 bits indicate values in optional slots */
+enum {
+ UCASE_EXC_LOWER,
+ UCASE_EXC_FOLD,
+ UCASE_EXC_UPPER,
+ UCASE_EXC_TITLE,
+ UCASE_EXC_4, /* reserved */
+ UCASE_EXC_5, /* reserved */
+ UCASE_EXC_CLOSURE,
+ UCASE_EXC_FULL_MAPPINGS,
+ UCASE_EXC_ALL_SLOTS /* one past the last slot */
+};
+
+/* each slot is 2 uint16_t instead of 1 */
+#define UCASE_EXC_DOUBLE_SLOTS 0x100
+
+/* reserved: exception bits 11..9 */
+
+/* UCASE_EXC_DOT_MASK=UCASE_DOT_MASK<<UCASE_EXC_DOT_SHIFT */
+#define UCASE_EXC_DOT_SHIFT 7
+
+/* normally stored in the main word, but pushed out for larger exception indexes */
+#define UCASE_EXC_DOT_MASK 0x3000
+enum {
+ UCASE_EXC_NO_DOT=0,
+ UCASE_EXC_SOFT_DOTTED=0x1000,
+ UCASE_EXC_ABOVE=0x2000, /* "above" accents with cc=230 */
+ UCASE_EXC_OTHER_ACCENT=0x3000 /* other character (0<cc!=230) */
+};
+
+/* complex/conditional mappings */
+#define UCASE_EXC_CONDITIONAL_SPECIAL 0x4000
+#define UCASE_EXC_CONDITIONAL_FOLD 0x8000
+
+/* definitions for lengths word for full case mappings */
+#define UCASE_FULL_LOWER 0xf
+#define UCASE_FULL_FOLDING 0xf0
+#define UCASE_FULL_UPPER 0xf00
+#define UCASE_FULL_TITLE 0xf000
+
+/* maximum lengths */
+#define UCASE_FULL_MAPPINGS_MAX_LENGTH (4*0xf)
+#define UCASE_CLOSURE_MAX_LENGTH 0xf
+
+/* constants for reverse case folding ("unfold") data */
+enum {
+ UCASE_UNFOLD_ROWS,
+ UCASE_UNFOLD_ROW_WIDTH,
+ UCASE_UNFOLD_STRING_WIDTH
+};
+
+#endif