chromium/third_party/icu/source/common/utrie_swap.cpp

// © 2018 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html

// utrie_swap.cpp
// created: 2018aug08 Markus W. Scherer

#include "unicode/utypes.h"
#include "cmemory.h"
#include "ucptrie_impl.h"
#include "udataswp.h"
#include "utrie.h"
#include "utrie2_impl.h"

// These functions for swapping different generations of ICU code point tries are here
// so that their implementation files need not depend on swapper code,
// need not depend on each other, and so that other swapper code
// need not depend on other trie code.

namespace {

constexpr int32_t ASCII_LIMIT = …;

}  // namespace

U_CAPI int32_t U_EXPORT2
utrie_swap(const UDataSwapper *ds,
           const void *inData, int32_t length, void *outData,
           UErrorCode *pErrorCode) { … }

U_CAPI int32_t U_EXPORT2
utrie2_swap(const UDataSwapper *ds,
            const void *inData, int32_t length, void *outData,
            UErrorCode *pErrorCode) { … }

U_CAPI int32_t U_EXPORT2
ucptrie_swap(const UDataSwapper *ds,
             const void *inData, int32_t length, void *outData,
             UErrorCode *pErrorCode) { … }

namespace {

/**
 * Gets the trie version from 32-bit-aligned memory containing the serialized form
 * of a UTrie (version 1), a UTrie2 (version 2), or a UCPTrie (version 3).
 *
 * @param data a pointer to 32-bit-aligned memory containing the serialized form of a trie
 * @param length the number of bytes available at data;
 *               can be more than necessary (see return value)
 * @param anyEndianOk If false, only platform-endian serialized forms are recognized.
 *                    If true, opposite-endian serialized forms are recognized as well.
 * @return the trie version of the serialized form, or 0 if it is not
 *         recognized as a serialized trie
 */
int32_t
getVersion(const void *data, int32_t length, UBool anyEndianOk) { … }

}  // namespace

U_CAPI int32_t U_EXPORT2
utrie_swapAnyVersion(const UDataSwapper *ds,
                     const void *inData, int32_t length, void *outData,
                     UErrorCode *pErrorCode) { … }