324 lines
8.3 KiB
C++
324 lines
8.3 KiB
C++
/*
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**********************************************************************
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* Copyright (c) 2002-2005, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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* Author: Alan Liu
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* Created: November 11 2002
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* Since: ICU 2.4
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**********************************************************************
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*/
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#include "unicode/ustring.h"
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#include "unicode/strenum.h"
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#include "unicode/putil.h"
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#include "uenumimp.h"
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#include "ustrenum.h"
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#include "cstring.h"
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#include "cmemory.h"
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#include "uassert.h"
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U_NAMESPACE_BEGIN
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// StringEnumeration implementation ---------------------------------------- ***
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StringEnumeration::StringEnumeration()
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: chars(charsBuffer), charsCapacity(sizeof(charsBuffer)) {
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}
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StringEnumeration::~StringEnumeration() {
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if (chars != NULL && chars != charsBuffer) {
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uprv_free(chars);
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}
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}
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// StringEnumeration base class clone() default implementation, does not clone
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StringEnumeration *
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StringEnumeration::clone() const {
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return NULL;
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}
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const char *
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StringEnumeration::next(int32_t *resultLength, UErrorCode &status) {
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const UnicodeString *s=snext(status);
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if(s!=NULL) {
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unistr=*s;
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ensureCharsCapacity(unistr.length()+1, status);
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if(U_SUCCESS(status)) {
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if(resultLength!=NULL) {
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*resultLength=unistr.length();
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}
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unistr.extract(0, INT32_MAX, chars, charsCapacity, US_INV);
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return chars;
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}
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}
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return NULL;
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}
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const UChar *
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StringEnumeration::unext(int32_t *resultLength, UErrorCode &status) {
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const UnicodeString *s=snext(status);
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if(s!=NULL) {
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unistr=*s;
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if(U_SUCCESS(status)) {
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if(resultLength!=NULL) {
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*resultLength=unistr.length();
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}
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return unistr.getTerminatedBuffer();
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}
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}
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return NULL;
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}
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void
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StringEnumeration::ensureCharsCapacity(int32_t capacity, UErrorCode &status) {
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if(U_SUCCESS(status) && capacity>charsCapacity) {
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if(capacity<(charsCapacity+charsCapacity/2)) {
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// avoid allocation thrashing
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capacity=charsCapacity+charsCapacity/2;
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}
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if(chars!=charsBuffer) {
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uprv_free(chars);
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}
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chars=(char *)uprv_malloc(capacity);
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if(chars==NULL) {
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chars=charsBuffer;
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charsCapacity=sizeof(charsBuffer);
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status=U_MEMORY_ALLOCATION_ERROR;
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} else {
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charsCapacity=capacity;
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}
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}
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}
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UnicodeString *
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StringEnumeration::setChars(const char *s, int32_t length, UErrorCode &status) {
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if(U_SUCCESS(status) && s!=NULL) {
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if(length<0) {
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length=(int32_t)uprv_strlen(s);
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}
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UChar *buffer=unistr.getBuffer(length+1);
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if(buffer!=NULL) {
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u_charsToUChars(s, buffer, length);
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buffer[length]=0;
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unistr.releaseBuffer(length);
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return &unistr;
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} else {
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status=U_MEMORY_ALLOCATION_ERROR;
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}
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}
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return NULL;
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}
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UBool
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StringEnumeration::operator==(const StringEnumeration& that)const {
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return getDynamicClassID() == that.getDynamicClassID();
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}
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UBool
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StringEnumeration::operator!=(const StringEnumeration& that)const {
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return !operator==(that);
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}
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// UStringEnumeration implementation --------------------------------------- ***
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UStringEnumeration::UStringEnumeration(UEnumeration* _uenum) :
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uenum(_uenum) {
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U_ASSERT(_uenum != 0);
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}
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UStringEnumeration::~UStringEnumeration() {
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uenum_close(uenum);
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}
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int32_t UStringEnumeration::count(UErrorCode& status) const {
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return uenum_count(uenum, &status);
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}
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const UnicodeString* UStringEnumeration::snext(UErrorCode& status) {
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int32_t length;
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const UChar* str = uenum_unext(uenum, &length, &status);
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if (str == 0 || U_FAILURE(status)) {
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return 0;
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}
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return &unistr.setTo(str, length);
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}
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void UStringEnumeration::reset(UErrorCode& status) {
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uenum_reset(uenum, &status);
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}
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UOBJECT_DEFINE_RTTI_IMPLEMENTATION(UStringEnumeration/*, StringEnumeration*/)
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U_NAMESPACE_END
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// C wrapper --------------------------------------------------------------- ***
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#define THIS(en) ((StringEnumeration*)(en->context))
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U_CDECL_BEGIN
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/**
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* Wrapper API to make StringEnumeration look like UEnumeration.
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*/
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static void U_CALLCONV
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ustrenum_close(UEnumeration* en) {
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delete THIS(en);
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uprv_free(en);
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}
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/**
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* Wrapper API to make StringEnumeration look like UEnumeration.
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*/
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static int32_t U_CALLCONV
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ustrenum_count(UEnumeration* en,
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UErrorCode* ec)
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{
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return THIS(en)->count(*ec);
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}
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/**
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* Wrapper API to make StringEnumeration look like UEnumeration.
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*/
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static const UChar* U_CALLCONV
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ustrenum_unext(UEnumeration* en,
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int32_t* resultLength,
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UErrorCode* ec)
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{
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return THIS(en)->unext(resultLength, *ec);
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}
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/**
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* Wrapper API to make StringEnumeration look like UEnumeration.
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*/
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static const char* U_CALLCONV
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ustrenum_next(UEnumeration* en,
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int32_t* resultLength,
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UErrorCode* ec)
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{
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return THIS(en)->next(resultLength, *ec);
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}
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/**
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* Wrapper API to make StringEnumeration look like UEnumeration.
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*/
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static void U_CALLCONV
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ustrenum_reset(UEnumeration* en,
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UErrorCode* ec)
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{
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THIS(en)->reset(*ec);
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}
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/**
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* Pseudo-vtable for UEnumeration wrapper around StringEnumeration.
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* The StringEnumeration pointer will be stored in 'context'.
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*/
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static const UEnumeration USTRENUM_VT = {
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NULL,
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NULL, // store StringEnumeration pointer here
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ustrenum_close,
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ustrenum_count,
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ustrenum_unext,
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ustrenum_next,
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ustrenum_reset
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};
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U_CDECL_END
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/**
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* Given a StringEnumeration, wrap it in a UEnumeration. The
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* StringEnumeration is adopted; after this call, the caller must not
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* delete it (regardless of error status).
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*/
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U_CAPI UEnumeration* U_EXPORT2
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uenum_openStringEnumeration(StringEnumeration* adopted, UErrorCode* ec) {
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UEnumeration* result = NULL;
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if (U_SUCCESS(*ec) && adopted != NULL) {
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result = (UEnumeration*) uprv_malloc(sizeof(UEnumeration));
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if (result == NULL) {
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*ec = U_MEMORY_ALLOCATION_ERROR;
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} else {
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uprv_memcpy(result, &USTRENUM_VT, sizeof(USTRENUM_VT));
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result->context = adopted;
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}
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}
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if (result == NULL) {
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delete adopted;
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}
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return result;
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}
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// C wrapper --------------------------------------------------------------- ***
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U_CDECL_BEGIN
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typedef struct UCharStringEnumeration {
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UEnumeration uenum;
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int32_t index, count;
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} UCharStringEnumeration;
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static void U_CALLCONV
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ucharstrenum_close(UEnumeration* en) {
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uprv_free(en);
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}
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static int32_t U_CALLCONV
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ucharstrenum_count(UEnumeration* en,
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UErrorCode* /*ec*/) {
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return ((UCharStringEnumeration*)en)->count;
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}
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static const char* U_CALLCONV
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ucharstrenum_next(UEnumeration* en,
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int32_t* resultLength,
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UErrorCode* /*ec*/) {
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UCharStringEnumeration *e = (UCharStringEnumeration*) en;
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if (e->index >= e->count) {
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return NULL;
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}
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const char* result = ((const char**)e->uenum.context)[e->index++];
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if (resultLength) {
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*resultLength = (int32_t)uprv_strlen(result);
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}
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return result;
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}
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static void U_CALLCONV
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ucharstrenum_reset(UEnumeration* en,
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UErrorCode* /*ec*/) {
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((UCharStringEnumeration*)en)->index = 0;
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}
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static const UEnumeration UCHARSTRENUM_VT = {
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NULL,
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NULL, // store StringEnumeration pointer here
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ucharstrenum_close,
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ucharstrenum_count,
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uenum_unextDefault,
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ucharstrenum_next,
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ucharstrenum_reset
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};
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U_CDECL_END
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U_CAPI UEnumeration* U_EXPORT2
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uenum_openCharStringsEnumeration(const char** strings, int32_t count,
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UErrorCode* ec) {
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UCharStringEnumeration* result = NULL;
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if (U_SUCCESS(*ec) && count >= 0 && (count == 0 || strings != 0)) {
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result = (UCharStringEnumeration*) uprv_malloc(sizeof(UCharStringEnumeration));
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if (result == NULL) {
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*ec = U_MEMORY_ALLOCATION_ERROR;
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} else {
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U_ASSERT((char*)result==(char*)(&result->uenum));
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uprv_memcpy(result, &UCHARSTRENUM_VT, sizeof(UCHARSTRENUM_VT));
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result->uenum.context = strings;
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result->index = 0;
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result->count = count;
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}
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}
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return (UEnumeration*) result;
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}
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