ICU-531.30.tar.gz

[apple/icu.git] / icuSources / common / unorm_it.h

diff --git a/icuSources/common/unorm_it.h b/icuSources/common/unorm_it.h
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-/*
-*******************************************************************************
-*
-*   Copyright (C) 2003, International Business Machines
-*   Corporation and others.  All Rights Reserved.
-*
-*******************************************************************************
-*   file name:  unorm_it.h
-*   encoding:   US-ASCII
-*   tab size:   8 (not used)
-*   indentation:4
-*
-*   created on: 2003jan21
-*   created by: Markus W. Scherer
-*/
-
-#ifndef __UNORM_IT_H__
-#define __UNORM_IT_H__
-
-#include "unicode/utypes.h"
-
-#if !UCONFIG_NO_COLLATION && !UCONFIG_NO_NORMALIZATION
-
-#include "unicode/uiter.h"
-#include "unicode/unorm.h"
-
-/**
- * Normalizing UCharIterator wrapper.
- * This internal API basically duplicates the functionality of the C++ Normalizer
- * but
- * - it actually implements a character iterator (UCharIterator)
- *   with few restrictions (see unorm_setIter())
- * - it supports UCharIterator getState()/setState()
- * - it uses lower-level APIs and buffers more text and states,
- *   hopefully resulting in higher performance
- *
- * Usage example:
- * \code
- * function(UCharIterator *srcIter) {
- *     UNormIterator *uni;
- *     UCharIterator *iter;
- *     UErrorCode errorCode;
- * 
- *     errorCode=U_ZERO_ERROR;
- *     uni=unorm_openIter(&errorCode);
- *     if(U_FAILURE(errorCode)) {
- *         // report error
- *         return;
- *     }
- * 
- *     iter=unorm_setIter(uni, srcIter, UNORM_FCD, &errorCode);
- *     if(U_FAILURE(errorCode)) {
- *         // report error
- *     } else {
- *         // use iter to iterate over the canonically ordered
- *         // version of srcIter's text
- *         uint32_t state;
- * 
- *         ...
- * 
- *         state=uiter_getState(iter);
- *         if(state!=UITER_NO_STATE) {
- *             // use valid state, store it, use iter some more
- *             ...
- * 
- *             // later restore iter to the saved state:
- *             uiter_setState(iter, state, &errorCode);
- * 
- *             ...
- *         }
- * 
- *         ...
- *     }
- *     unorm_closeIter(uni);
- * }
- * \endcode
- *
- * See also the ICU test suites.
- *
- * @internal
- */
-struct UNormIterator;
-typedef struct UNormIterator UNormIterator;
-
-/**
- * Size of a stack buffer to hold a UNormIterator, see the stackMem parameter
- * of unorm_openIter().
- *
- * @internal
- */
-#define UNORM_ITER_SIZE 1024
-
-/**
- * Open a normalizing iterator. Must be closed later.
- * Use unorm_setIter().
- *
- * @param stackMem Pointer to preallocated (stack-allocated) buffer to hold
- *                 the UNormIterator if possible; can be NULL.
- * @param stackMemSize Number of bytes at stackMem; can be 0,
- *                     or should be >= UNORM_ITER_SIZE for a non-NULL stackMem.
- * @param pErrorCode ICU error code
- * @return an allocated and pre-initialized UNormIterator
- * @internal
- */
-U_CAPI UNormIterator * U_EXPORT2
-unorm_openIter(void *stackMem, int32_t stackMemSize, UErrorCode *pErrorCode);
-
-/**
- * Close a normalizing iterator.
- *
- * @param uni UNormIterator from unorm_openIter()
- * @internal
- */
-U_CAPI void U_EXPORT2
-unorm_closeIter(UNormIterator *uni);
-
-/**
- * Set a UCharIterator and a normalization mode for the normalizing iterator
- * to wrap. The normalizing iterator will read from the character iterator,
- * normalize the text, and in turn deliver it with its own wrapper UCharIterator
- * interface which it returns.
- *
- * The source iterator remains at its current position through the unorm_setIter()
- * call but will be used and moved as soon as the
- * the returned normalizing iterator is.
- *
- * The returned interface pointer is valid for as long as the normalizing iterator
- * is open and until another unorm_setIter() call is made on it.
- *
- * The normalizing iterator's UCharIterator interface has the following properties:
- * - getIndex() and move() will almost always return UITER_UNKNOWN_INDEX
- * - getState() will return UITER_NO_STATE for unknown states for positions
- *              that are not at normalization boundaries
- *
- * @param uni UNormIterator from unorm_openIter()
- * @param iter The source text UCharIterator to be wrapped. It is aliases into the normalizing iterator.
- *             Must support getState() and setState().
- * @param mode The normalization mode.
- * @param pErrorCode ICU error code
- * @return an alias to the normalizing iterator's UCharIterator interface
- * @internal
- */
-U_CAPI UCharIterator * U_EXPORT2
-unorm_setIter(UNormIterator *uni, UCharIterator *iter, UNormalizationMode mode, UErrorCode *pErrorCode);
-
-#endif /* uconfig.h switches */
-
-#endif