From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 02:47:55 +0200 Subject: Adding upstream version 124.0.1. Signed-off-by: Daniel Baumann --- intl/icu/source/common/uenum.cpp | 189 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 189 insertions(+) create mode 100644 intl/icu/source/common/uenum.cpp (limited to 'intl/icu/source/common/uenum.cpp') diff --git a/intl/icu/source/common/uenum.cpp b/intl/icu/source/common/uenum.cpp new file mode 100644 index 0000000000..7aab58c44c --- /dev/null +++ b/intl/icu/source/common/uenum.cpp @@ -0,0 +1,189 @@ +// © 2016 and later: Unicode, Inc. and others. +// License & terms of use: http://www.unicode.org/copyright.html +/* +******************************************************************************* +* +* Copyright (C) 2002-2012, International Business Machines +* Corporation and others. All Rights Reserved. +* +******************************************************************************* +* file name: uenum.c +* encoding: UTF-8 +* tab size: 8 (not used) +* indentation:2 +* +* created on: 2002jul08 +* created by: Vladimir Weinstein +*/ + +#include "unicode/putil.h" +#include "uenumimp.h" +#include "cmemory.h" + +/* Layout of the baseContext buffer. */ +typedef struct { + int32_t len; /* number of bytes available starting at 'data' */ + char data; /* actual data starts here */ +} _UEnumBuffer; + +/* Extra bytes to allocate in the baseContext buffer. */ +static const int32_t PAD = 8; + +/* Return a pointer to the baseContext buffer, possibly allocating + or reallocating it if at least 'capacity' bytes are not available. */ +static void* _getBuffer(UEnumeration* en, int32_t capacity) { + + if (en->baseContext != nullptr) { + if (((_UEnumBuffer*) en->baseContext)->len < capacity) { + capacity += PAD; + en->baseContext = uprv_realloc(en->baseContext, + sizeof(int32_t) + capacity); + if (en->baseContext == nullptr) { + return nullptr; + } + ((_UEnumBuffer*) en->baseContext)->len = capacity; + } + } else { + capacity += PAD; + en->baseContext = uprv_malloc(sizeof(int32_t) + capacity); + if (en->baseContext == nullptr) { + return nullptr; + } + ((_UEnumBuffer*) en->baseContext)->len = capacity; + } + + return (void*) & ((_UEnumBuffer*) en->baseContext)->data; +} + +U_CAPI void U_EXPORT2 +uenum_close(UEnumeration* en) +{ + if (en) { + if (en->close != nullptr) { + if (en->baseContext) { + uprv_free(en->baseContext); + } + en->close(en); + } else { /* this seems dangerous, but we better kill the object */ + uprv_free(en); + } + } +} + +U_CAPI int32_t U_EXPORT2 +uenum_count(UEnumeration* en, UErrorCode* status) +{ + if (!en || U_FAILURE(*status)) { + return -1; + } + if (en->count != nullptr) { + return en->count(en, status); + } else { + *status = U_UNSUPPORTED_ERROR; + return -1; + } +} + +/* Don't call this directly. Only uenum_unext should be calling this. */ +U_CAPI const char16_t* U_EXPORT2 +uenum_unextDefault(UEnumeration* en, + int32_t* resultLength, + UErrorCode* status) +{ + char16_t *ustr = nullptr; + int32_t len = 0; + if (en->next != nullptr) { + const char *cstr = en->next(en, &len, status); + if (cstr != nullptr) { + ustr = (char16_t*) _getBuffer(en, (len+1) * sizeof(char16_t)); + if (ustr == nullptr) { + *status = U_MEMORY_ALLOCATION_ERROR; + } else { + u_charsToUChars(cstr, ustr, len+1); + } + } + } else { + *status = U_UNSUPPORTED_ERROR; + } + if (resultLength) { + *resultLength = len; + } + return ustr; +} + +/* Don't call this directly. Only uenum_next should be calling this. */ +U_CAPI const char* U_EXPORT2 +uenum_nextDefault(UEnumeration* en, + int32_t* resultLength, + UErrorCode* status) +{ + if (en->uNext != nullptr) { + char *tempCharVal; + const char16_t *tempUCharVal = en->uNext(en, resultLength, status); + if (tempUCharVal == nullptr) { + return nullptr; + } + tempCharVal = (char*) + _getBuffer(en, (*resultLength+1) * sizeof(char)); + if (!tempCharVal) { + *status = U_MEMORY_ALLOCATION_ERROR; + return nullptr; + } + u_UCharsToChars(tempUCharVal, tempCharVal, *resultLength + 1); + return tempCharVal; + } else { + *status = U_UNSUPPORTED_ERROR; + return nullptr; + } +} + +U_CAPI const char16_t* U_EXPORT2 +uenum_unext(UEnumeration* en, + int32_t* resultLength, + UErrorCode* status) +{ + if (!en || U_FAILURE(*status)) { + return nullptr; + } + if (en->uNext != nullptr) { + return en->uNext(en, resultLength, status); + } else { + *status = U_UNSUPPORTED_ERROR; + return nullptr; + } +} + +U_CAPI const char* U_EXPORT2 +uenum_next(UEnumeration* en, + int32_t* resultLength, + UErrorCode* status) +{ + if (!en || U_FAILURE(*status)) { + return nullptr; + } + if (en->next != nullptr) { + if (resultLength != nullptr) { + return en->next(en, resultLength, status); + } + else { + int32_t dummyLength=0; + return en->next(en, &dummyLength, status); + } + } else { + *status = U_UNSUPPORTED_ERROR; + return nullptr; + } +} + +U_CAPI void U_EXPORT2 +uenum_reset(UEnumeration* en, UErrorCode* status) +{ + if (!en || U_FAILURE(*status)) { + return; + } + if (en->reset != nullptr) { + en->reset(en, status); + } else { + *status = U_UNSUPPORTED_ERROR; + } +} -- cgit v1.2.3