5a3ea669aa
- includes new APIChangeReport.md - the 'simplification' section is no longer new - uses tools from [ICU-20162] #807 Includes non-promotion fixes: - utrace.h: UTRACE_UDATA_BUNDLE
239 lines
8.2 KiB
C
239 lines
8.2 KiB
C
// © 2017 and later: Unicode, Inc. and others.
|
|
// License & terms of use: http://www.unicode.org/copyright.html
|
|
|
|
// umutablecptrie.h (split out of ucptrie.h)
|
|
// created: 2018jan24 Markus W. Scherer
|
|
|
|
#ifndef __UMUTABLECPTRIE_H__
|
|
#define __UMUTABLECPTRIE_H__
|
|
|
|
#include "unicode/utypes.h"
|
|
|
|
#include "unicode/localpointer.h"
|
|
#include "unicode/ucpmap.h"
|
|
#include "unicode/ucptrie.h"
|
|
#include "unicode/utf8.h"
|
|
|
|
U_CDECL_BEGIN
|
|
|
|
/**
|
|
* \file
|
|
*
|
|
* This file defines a mutable Unicode code point trie.
|
|
*
|
|
* @see UCPTrie
|
|
* @see UMutableCPTrie
|
|
*/
|
|
|
|
/**
|
|
* Mutable Unicode code point trie.
|
|
* Fast map from Unicode code points (U+0000..U+10FFFF) to 32-bit integer values.
|
|
* For details see http://site.icu-project.org/design/struct/utrie
|
|
*
|
|
* Setting values (especially ranges) and lookup is fast.
|
|
* The mutable trie is only somewhat space-efficient.
|
|
* It builds a compacted, immutable UCPTrie.
|
|
*
|
|
* This trie can be modified while iterating over its contents.
|
|
* For example, it is possible to merge its values with those from another
|
|
* set of ranges (e.g., another mutable or immutable trie):
|
|
* Iterate over those source ranges; for each of them iterate over this trie;
|
|
* add the source value into the value of each trie range.
|
|
*
|
|
* @see UCPTrie
|
|
* @see umutablecptrie_buildImmutable
|
|
* @stable ICU 63
|
|
*/
|
|
typedef struct UMutableCPTrie UMutableCPTrie;
|
|
|
|
/**
|
|
* Creates a mutable trie that initially maps each Unicode code point to the same value.
|
|
* It uses 32-bit data values until umutablecptrie_buildImmutable() is called.
|
|
* umutablecptrie_buildImmutable() takes a valueWidth parameter which
|
|
* determines the number of bits in the data value in the resulting UCPTrie.
|
|
* You must umutablecptrie_close() the trie once you are done using it.
|
|
*
|
|
* @param initialValue the initial value that is set for all code points
|
|
* @param errorValue the value for out-of-range code points and ill-formed UTF-8/16
|
|
* @param pErrorCode an in/out ICU UErrorCode
|
|
* @return the trie
|
|
* @stable ICU 63
|
|
*/
|
|
U_CAPI UMutableCPTrie * U_EXPORT2
|
|
umutablecptrie_open(uint32_t initialValue, uint32_t errorValue, UErrorCode *pErrorCode);
|
|
|
|
/**
|
|
* Clones a mutable trie.
|
|
* You must umutablecptrie_close() the clone once you are done using it.
|
|
*
|
|
* @param other the trie to clone
|
|
* @param pErrorCode an in/out ICU UErrorCode
|
|
* @return the trie clone
|
|
* @stable ICU 63
|
|
*/
|
|
U_CAPI UMutableCPTrie * U_EXPORT2
|
|
umutablecptrie_clone(const UMutableCPTrie *other, UErrorCode *pErrorCode);
|
|
|
|
/**
|
|
* Closes a mutable trie and releases associated memory.
|
|
*
|
|
* @param trie the trie
|
|
* @stable ICU 63
|
|
*/
|
|
U_CAPI void U_EXPORT2
|
|
umutablecptrie_close(UMutableCPTrie *trie);
|
|
|
|
#if U_SHOW_CPLUSPLUS_API
|
|
|
|
U_NAMESPACE_BEGIN
|
|
|
|
/**
|
|
* \class LocalUMutableCPTriePointer
|
|
* "Smart pointer" class, closes a UMutableCPTrie via umutablecptrie_close().
|
|
* For most methods see the LocalPointerBase base class.
|
|
*
|
|
* @see LocalPointerBase
|
|
* @see LocalPointer
|
|
* @stable ICU 63
|
|
*/
|
|
U_DEFINE_LOCAL_OPEN_POINTER(LocalUMutableCPTriePointer, UMutableCPTrie, umutablecptrie_close);
|
|
|
|
U_NAMESPACE_END
|
|
|
|
#endif
|
|
|
|
/**
|
|
* Creates a mutable trie with the same contents as the UCPMap.
|
|
* You must umutablecptrie_close() the mutable trie once you are done using it.
|
|
*
|
|
* @param map the source map
|
|
* @param pErrorCode an in/out ICU UErrorCode
|
|
* @return the mutable trie
|
|
* @stable ICU 63
|
|
*/
|
|
U_CAPI UMutableCPTrie * U_EXPORT2
|
|
umutablecptrie_fromUCPMap(const UCPMap *map, UErrorCode *pErrorCode);
|
|
|
|
/**
|
|
* Creates a mutable trie with the same contents as the immutable one.
|
|
* You must umutablecptrie_close() the mutable trie once you are done using it.
|
|
*
|
|
* @param trie the immutable trie
|
|
* @param pErrorCode an in/out ICU UErrorCode
|
|
* @return the mutable trie
|
|
* @stable ICU 63
|
|
*/
|
|
U_CAPI UMutableCPTrie * U_EXPORT2
|
|
umutablecptrie_fromUCPTrie(const UCPTrie *trie, UErrorCode *pErrorCode);
|
|
|
|
/**
|
|
* Returns the value for a code point as stored in the trie.
|
|
*
|
|
* @param trie the trie
|
|
* @param c the code point
|
|
* @return the value
|
|
* @stable ICU 63
|
|
*/
|
|
U_CAPI uint32_t U_EXPORT2
|
|
umutablecptrie_get(const UMutableCPTrie *trie, UChar32 c);
|
|
|
|
/**
|
|
* Returns the last code point such that all those from start to there have the same value.
|
|
* Can be used to efficiently iterate over all same-value ranges in a trie.
|
|
* (This is normally faster than iterating over code points and get()ting each value,
|
|
* but much slower than a data structure that stores ranges directly.)
|
|
*
|
|
* The trie can be modified between calls to this function.
|
|
*
|
|
* If the UCPMapValueFilter function pointer is not NULL, then
|
|
* the value to be delivered is passed through that function, and the return value is the end
|
|
* of the range where all values are modified to the same actual value.
|
|
* The value is unchanged if that function pointer is NULL.
|
|
*
|
|
* See the same-signature ucptrie_getRange() for a code sample.
|
|
*
|
|
* @param trie the trie
|
|
* @param start range start
|
|
* @param option defines whether surrogates are treated normally,
|
|
* or as having the surrogateValue; usually UCPMAP_RANGE_NORMAL
|
|
* @param surrogateValue value for surrogates; ignored if option==UCPMAP_RANGE_NORMAL
|
|
* @param filter a pointer to a function that may modify the trie data value,
|
|
* or NULL if the values from the trie are to be used unmodified
|
|
* @param context an opaque pointer that is passed on to the filter function
|
|
* @param pValue if not NULL, receives the value that every code point start..end has;
|
|
* may have been modified by filter(context, trie value)
|
|
* if that function pointer is not NULL
|
|
* @return the range end code point, or -1 if start is not a valid code point
|
|
* @stable ICU 63
|
|
*/
|
|
U_CAPI UChar32 U_EXPORT2
|
|
umutablecptrie_getRange(const UMutableCPTrie *trie, UChar32 start,
|
|
UCPMapRangeOption option, uint32_t surrogateValue,
|
|
UCPMapValueFilter *filter, const void *context, uint32_t *pValue);
|
|
|
|
/**
|
|
* Sets a value for a code point.
|
|
*
|
|
* @param trie the trie
|
|
* @param c the code point
|
|
* @param value the value
|
|
* @param pErrorCode an in/out ICU UErrorCode
|
|
* @stable ICU 63
|
|
*/
|
|
U_CAPI void U_EXPORT2
|
|
umutablecptrie_set(UMutableCPTrie *trie, UChar32 c, uint32_t value, UErrorCode *pErrorCode);
|
|
|
|
/**
|
|
* Sets a value for each code point [start..end].
|
|
* Faster and more space-efficient than setting the value for each code point separately.
|
|
*
|
|
* @param trie the trie
|
|
* @param start the first code point to get the value
|
|
* @param end the last code point to get the value (inclusive)
|
|
* @param value the value
|
|
* @param pErrorCode an in/out ICU UErrorCode
|
|
* @stable ICU 63
|
|
*/
|
|
U_CAPI void U_EXPORT2
|
|
umutablecptrie_setRange(UMutableCPTrie *trie,
|
|
UChar32 start, UChar32 end,
|
|
uint32_t value, UErrorCode *pErrorCode);
|
|
|
|
/**
|
|
* Compacts the data and builds an immutable UCPTrie according to the parameters.
|
|
* After this, the mutable trie will be empty.
|
|
*
|
|
* The mutable trie stores 32-bit values until buildImmutable() is called.
|
|
* If values shorter than 32 bits are to be stored in the immutable trie,
|
|
* then the upper bits are discarded.
|
|
* For example, when the mutable trie contains values 0x81, -0x7f, and 0xa581,
|
|
* and the value width is 8 bits, then each of these is stored as 0x81
|
|
* and the immutable trie will return that as an unsigned value.
|
|
* (Some implementations may want to make productive temporary use of the upper bits
|
|
* until buildImmutable() discards them.)
|
|
*
|
|
* Not every possible set of mappings can be built into a UCPTrie,
|
|
* because of limitations resulting from speed and space optimizations.
|
|
* Every Unicode assigned character can be mapped to a unique value.
|
|
* Typical data yields data structures far smaller than the limitations.
|
|
*
|
|
* It is possible to construct extremely unusual mappings that exceed the data structure limits.
|
|
* In such a case this function will fail with a U_INDEX_OUTOFBOUNDS_ERROR.
|
|
*
|
|
* @param trie the trie trie
|
|
* @param type selects the trie type
|
|
* @param valueWidth selects the number of bits in a trie data value; if smaller than 32 bits,
|
|
* then the values stored in the trie will be truncated first
|
|
* @param pErrorCode an in/out ICU UErrorCode
|
|
*
|
|
* @see umutablecptrie_fromUCPTrie
|
|
* @stable ICU 63
|
|
*/
|
|
U_CAPI UCPTrie * U_EXPORT2
|
|
umutablecptrie_buildImmutable(UMutableCPTrie *trie, UCPTrieType type, UCPTrieValueWidth valueWidth,
|
|
UErrorCode *pErrorCode);
|
|
|
|
U_CDECL_END
|
|
|
|
#endif
|