scuffed-code/icu4c/source/common/resbund.cpp
George Rhoten c4997713ef ICU-903 Updated the copyright notice
X-SVN-Rev: 4238
2001-03-21 20:44:20 +00:00

740 lines
25 KiB
C++

/*
**********************************************************************
* Copyright (C) 1997-2001, International Business Machines
* Corporation and others. All Rights Reserved.
**********************************************************************
*
* File resbund.cpp
*
* Modification History:
*
* Date Name Description
* 02/05/97 aliu Fixed bug in chopLocale. Added scanForLocaleInFile
* based on code taken from scanForLocale. Added
* constructor which attempts to read resource bundle
* from a specific file, without searching other files.
* 02/11/97 aliu Added UErrorCode return values to constructors. Fixed
* infinite loops in scanForFile and scanForLocale.
* Modified getRawResourceData to not delete storage in
* localeData and resourceData which it doesn't own.
* Added Mac compatibility #ifdefs for tellp() and
* ios::nocreate.
* 03/04/97 aliu Modified to use ExpandingDataSink objects instead of
* the highly inefficient ostrstream objects.
* 03/13/97 aliu Rewrote to load in entire resource bundle and store
* it as a Hashtable of ResourceBundleData objects.
* Added state table to govern parsing of files.
* Modified to load locale index out of new file distinct
* from default.txt.
* 03/25/97 aliu Modified to support 2-d arrays, needed for timezone data.
* Added support for custom file suffixes. Again, needed
* to support timezone data. Improved error handling to
* detect duplicate tags and subtags.
* 04/07/97 aliu Fixed bug in getHashtableForLocale(). Fixed handling
* of failing UErrorCode values on entry to API methods.
* Fixed bugs in getArrayItem() for negative indices.
* 04/29/97 aliu Update to use new Hashtable deletion protocol.
* 05/06/97 aliu Flattened kTransitionTable for HP compiler.
* Fixed usage of CharString.
* 06/11/99 stephen Removed parsing of .txt files.
* Reworked to use new binary format.
* Cleaned up.
* 06/14/99 stephen Removed methods taking a filename suffix.
* 06/22/99 stephen Added missing T_FileStream_close in parse()
* 11/09/99 weiv Added getLocale(), rewritten constructForLocale()
* March 2000 weiv complete overhaul.
******************************************************************************
*/
#include "unicode/utypes.h"
#include "unicode/resbund.h"
#include "mutex.h"
#include "rbdata.h"
#include "unistrm.h"
#include "filestrm.h"
#include "cstring.h"
#include "uresimp.h"
#include "cmemory.h"
#ifdef ICU_RESBUND_USE_DEPRECATES
#include "uhash.h"
#endif
/*-----------------------------------------------------------------------------
* Implementation Notes
*
* Resource bundles are read in once, and thereafter cached.
* ResourceBundle statically keeps track of which files have been
* read, so we are guaranteed that each file is read at most once.
* Resource bundles can be loaded from different data directories and
* will be treated as distinct, even if they are for the same locale.
*
* Resource bundles are lightweight objects, which have pointers to
* one or more shared Hashtable objects containing all the data.
* Copying would be cheap, but there is no copy constructor, since
* there wasn't one in the original API.
*
* The ResourceBundle parsing mechanism is implemented as a transition
* network, for easy maintenance and modification. The network is
* implemented as a matrix (instead of in code) to make this even
* easier. The matrix contains Transition objects. Each Transition
* object describes a destination node and an action to take before
* moving to the destination node. The source node is encoded by the
* index of the object in the array that contains it. The pieces
* needed to understand the transition network are the enums for node
* IDs and actions, the parse() method, which walks through the
* network and implements the actions, and the network itself. The
* network guarantees certain conditions, for example, that a new
* resource will not be closed until one has been opened first; or
* that data will not be stored into a TaggedList until a TaggedList
* has been created. Nonetheless, the code in parse() does some
* consistency checks as it runs the network, and fails with an
* U_INTERNAL_PROGRAM_ERROR if one of these checks fails. If the input
* data has a bad format, an U_INVALID_FORMAT_ERROR is returned. If you
* see an U_INTERNAL_PROGRAM_ERROR the transition matrix has a bug in
* it.
*
* Old functionality of multiple locales in a single file is still
* supported. For this reason, LOCALE names override FILE names. If
* data for en_US is located in the en.txt file, once it is loaded,
* the code will not care where it came from (other than remembering
* which directory it came from). However, if there is an en_US
* resource in en_US.txt, that will take precedence. There is no
* limit to the number or type of resources that can be stored in a
* file, however, files are only searched in a specific way. If
* en_US_CA is requested, then first en_US_CA.txt is searched, then
* en_US.txt, then en.txt, then default.txt. So it only makes sense
* to put certain locales in certain files. In this example, it would
* be logical to put en_US_CA, en_US, and en into the en.txt file,
* since they would be found there if asked for. The extreme example
* is to place all locale resources into default.txt, which should
* also work.
*
* Inheritance is implemented. For example, xx_YY_zz inherits as
* follows: xx_YY_zz, xx_YY, xx, default. Inheritance is implemented
* as an array of hashtables. There will be from 1 to 4 hashtables in
* the array.
*
* Fallback files are implemented. The fallback pattern is Language
* Country Variant (LCV) -> LC -> L. Fallback is first done for the
* requested locale. Then it is done for the default locale, as
* returned by Locale::getDefault(). Then the special file
* default.txt is searched for the default locale. The overall FILE
* fallback path is LCV -> LC -> L -> dLCV -> dLC -> dL -> default.
*
* Note that although file name searching includes the default locale,
* once a ResourceBundle object is constructed, the inheritance path
* no longer includes the default locale. The path is LCV -> LC -> L
* -> default.
*
* File parsing is lazy. Nothing is parsed unless it is called for by
* someone. So when a ResourceBundle for xx_YY_zz is constructed,
* only that locale is parsed (along with anything else in the same
* file). Later, if the FooBar tag is asked for, and if it isn't
* found in xx_YY_zz, then xx_YY.txt will be parsed and checked, and
* so forth, until the chain is exhausted or the tag is found.
*
* Thread-safety is implemented around caches, both the cache that
* stores all the resouce data, and the cache that stores flags
* indicating whether or not a file has been visited. These caches
* delete their storage at static cleanup time, when the process
* quits.
*
* ResourceBundle supports TableCollation as a special case. This
* involves having special ResourceBundle objects which DO own their
* data, since we don't want large collation rule strings in the
* ResourceBundle cache (these are already cached in the
* TableCollation cache). TableCollation files (.ctx files) have the
* same format as normal resource data files, with a different
* interpretation, from the standpoint of ResourceBundle. .ctx files
* are loaded into otherwise ordinary ResourceBundle objects. They
* don't inherit (that's implemented by TableCollation) and they own
* their data (as mentioned above). However, they still support
* possible multiple locales in a single .ctx file. (This is in
* practice a bad idea, since you only want the one locale you're
* looking for, and only one tag will be present
* ("CollationElements"), so you don't need an inheritance chain of
* multiple locales.) Up to 4 locale resources will be loaded from a
* .ctx file; everything after the first 4 is ignored (parsed and
* deleted). (Normal .txt files have no limit.) Instead of being
* loaded into the cache, and then looked up as needed, the locale
* resources are read straight into the ResourceBundle object.
*
* The Index, which used to reside in default.txt, has been moved to a
* new file, index.txt. This file contains a slightly modified format
* with the addition of the "InstalledLocales" tag; it looks like:
*
* Index {
* InstalledLocales {
* ar
* ..
* zh_TW
* }
* }
*/
//-----------------------------------------------------------------------------
const char* ResourceBundle::kDefaultSuffix = ".res";
const int32_t ResourceBundle::kDefaultSuffixLen = 4;
const char* ResourceBundle::kDefaultFilename = "root";
const char* ResourceBundle::kDefaultLocaleName = "root";
//-----------------------------------------------------------------------------
ResourceBundle::ResourceBundle( const UnicodeString& path,
const Locale& locale,
UErrorCode& error)
{
constructForLocale(path, locale, error);
}
ResourceBundle::ResourceBundle(UErrorCode &err) {
#ifdef ICU_RESBUND_USE_DEPRECATES
fItemCache = 0;
#endif
resource = ures_open(0, Locale::getDefault().getName(), &err);
if(U_SUCCESS(err)) {
fRealLocale = Locale(ures_getRealLocale(resource, &err));
}
}
ResourceBundle::ResourceBundle( const UnicodeString& path,
UErrorCode& error)
{
constructForLocale(path,
Locale::getDefault(), error);
}
/**
* This constructor is used by TableCollation to load a resource
* bundle from a specific file, without trying other files. This is
* used by the TableCollation caching mechanism. This is not a public
* API constructor.
*/
ResourceBundle::ResourceBundle( const UnicodeString& path,
const char *localeName,
UErrorCode& status)
: fRealLocale(localeName)
{
#ifdef ICU_RESBUND_USE_DEPRECATES
fItemCache = 0;
#endif
int32_t patlen = path.length();
if(patlen > 0) {
char pathName[128];
path.extract(0, patlen, pathName, "");
pathName[patlen] = '\0';
resource = ures_openNoFallback(pathName, localeName, &status);
} else {
resource = ures_openNoFallback(0, localeName, &status);
}
if(U_SUCCESS(status)) {
fRealLocale = Locale(localeName);
}
}
ResourceBundle::ResourceBundle(const wchar_t* path,
const Locale& locale,
UErrorCode& err)
{
constructForLocale(path, locale, err);
}
ResourceBundle::ResourceBundle(const ResourceBundle &other) {
UErrorCode status = U_ZERO_ERROR;
if(other.resource->fIsTopLevel == TRUE) {
constructForLocale(ures_getPath(other.resource), Locale(ures_getName(other.resource)), status);
} else {
#ifdef ICU_RESBUND_USE_DEPRECATES
fItemCache = 0;
#endif
resource = copyResb(0, other.resource, &status);
}
}
ResourceBundle::ResourceBundle(UResourceBundle *res, UErrorCode& err) {
#ifdef ICU_RESBUND_USE_DEPRECATES
fItemCache = 0;
#endif
resource = copyResb(0, res, &err);
}
ResourceBundle::ResourceBundle( const char* path, const Locale& locale, UErrorCode& err) {
#ifdef ICU_RESBUND_USE_DEPRECATES
fItemCache = 0;
#endif
resource = ures_open(path, locale.getName(), &err);
if(U_SUCCESS(err)) {
fRealLocale = Locale(ures_getRealLocale(resource, &err));
}
}
ResourceBundle& ResourceBundle::operator=(const ResourceBundle& other)
{
if(this == &other) {
return *this;
}
#ifdef ICU_RESBUND_USE_DEPRECATES
if(fItemCache != 0) {
uhash_close(fItemCache);
fItemCache = 0;
}
#endif
if(resource != 0) {
ures_close(resource);
resource = 0;
}
UErrorCode status = U_ZERO_ERROR;
if(other.resource->fIsTopLevel == TRUE) {
constructForLocale(ures_getPath(other.resource), Locale(ures_getName(other.resource)), status);
} else {
resource = copyResb(resource, other.resource, &status);
}
return *this;
}
ResourceBundle::~ResourceBundle()
{
#ifdef ICU_RESBUND_USE_DEPRECATES
if(fItemCache != 0) {
uhash_close(fItemCache);
}
#endif
if(resource != 0) {
ures_close(resource);
}
}
void
ResourceBundle::deleteValue(void *value) {
delete (ResourceBundleData *)value;
}
#ifdef ICU_RESBUND_USE_DEPRECATES
void ResourceBundle::initItemCache(UErrorCode& error) {
if(fItemCache == 0) {
fItemCache = uhash_open(uhash_hashChars, uhash_compareChars, &error);
uhash_setValueDeleter(fItemCache, deleteValue);
}
}
#endif
void
ResourceBundle::constructForLocale(const UnicodeString& path,
const Locale& locale,
UErrorCode& error)
{
char name[128];
int32_t patlen = path.length();
#ifdef ICU_RESBUND_USE_DEPRECATES
fItemCache = 0;
#endif
if(patlen > 0) {
path.extract(0, patlen, name);
name[patlen] = '\0';
resource = ures_open(name, locale.getName(), &error);
} else {
resource = ures_open(0, locale.getName(), &error);
}
if(U_SUCCESS(error)) {
fRealLocale = Locale(ures_getRealLocale(resource, &error));
}
}
void
ResourceBundle::constructForLocale(const wchar_t* path,
const Locale& locale,
UErrorCode& error)
{
#ifdef ICU_RESBUND_USE_DEPRECATES
fItemCache = 0;
#endif
if(path != 0) {
resource = ures_openW(path, locale.getName(), &error);
} else {
resource = ures_open(0, locale.getName(), &error);
}
if(U_SUCCESS(error)) {
fRealLocale = Locale(ures_getRealLocale(resource, &error));
}
}
UnicodeString ResourceBundle::getString(UErrorCode& status) const {
int32_t len = 0;
const UChar *r = ures_getString(resource, &len, &status);
return UnicodeString(TRUE, r, len);
}
const uint8_t *ResourceBundle::getBinary(int32_t& len, UErrorCode& status) const {
return ures_getBinary(resource, &len, &status);
}
const char *ResourceBundle::getName(void) {
return ures_getName(resource);
}
const char *ResourceBundle::getKey(void) {
return ures_getKey(resource);
}
UResType ResourceBundle::getType(void) {
return ures_getType(resource);
}
int32_t ResourceBundle::getSize(void) const {
return ures_getSize(resource);
}
UBool ResourceBundle::hasNext(void) const {
return ures_hasNext(resource);
}
void ResourceBundle::resetIterator(void) {
ures_resetIterator(resource);
}
ResourceBundle ResourceBundle::getNext(UErrorCode& status) {
UResourceBundle r;
ures_setIsStackObject(&r, TRUE);
ures_getNextResource(resource, &r, &status);
return ResourceBundle(&r, status);
}
UnicodeString ResourceBundle::getNextString(UErrorCode& status) {
int32_t len = 0;
const UChar* r = ures_getNextString(resource, &len, 0, &status);
return UnicodeString(TRUE, r, len);
}
UnicodeString ResourceBundle::getNextString(const char ** key, UErrorCode& status) {
int32_t len = 0;
const UChar* r = ures_getNextString(resource, &len, key, &status);
return UnicodeString(TRUE, r, len);
}
ResourceBundle ResourceBundle::get(int32_t indexR, UErrorCode& status) const {
UResourceBundle r;
ures_setIsStackObject(&r, TRUE);
ures_getByIndex(resource, indexR, &r, &status);
return ResourceBundle(&r, status);
}
UnicodeString ResourceBundle::getStringEx(int32_t indexS, UErrorCode& status) const {
int32_t len = 0;
const UChar* r = ures_getStringByIndex(resource, indexS, &len, &status);
return UnicodeString(TRUE, r, len);
}
ResourceBundle ResourceBundle::get(const char* key, UErrorCode& status) const {
UResourceBundle r;
ures_setIsStackObject(&r, TRUE);
ures_getByKey(resource, key, &r, &status);
return ResourceBundle(&r, status);
}
UnicodeString ResourceBundle::getStringEx(const char* key, UErrorCode& status) const {
int32_t len = 0;
const UChar* r = ures_getStringByKey(resource, key, &len, &status);
return UnicodeString(TRUE, r, len);
}
const char*
ResourceBundle::getVersionNumber() const
{
return ures_getVersionNumber(resource);
}
void ResourceBundle::getVersion(UVersionInfo versionInfo) const {
ures_getVersion(resource, versionInfo);
}
const Locale &ResourceBundle::getLocale(void) const
{
return fRealLocale;
}
#ifdef ICU_RESBUND_USE_DEPRECATES
// Start deprecated API
const UnicodeString*
ResourceBundle::getString( const char *resourceTag,
UErrorCode& err) const
{
StringList *sldata;
if(U_FAILURE(err)) {
return 0;
}
((ResourceBundle &)(*this)).initItemCache(err); // Semantically const
sldata = (StringList *)uhash_get(fItemCache, resourceTag);
if(sldata == 0) {
const UChar *result = ures_get(resource, resourceTag, &err);
if(result != 0) {
UnicodeString *t = new UnicodeString[1];
t->setTo(TRUE, result, -1);
sldata = new StringList(t, 1);
} else {
err = U_MISSING_RESOURCE_ERROR;
return 0;
}
sldata->fCreationStatus = err;
uhash_put(fItemCache, (void *)resourceTag, sldata, &err);
} else {
err = sldata->fCreationStatus;
}
return sldata->fStrings;
}
const UnicodeString*
ResourceBundle::getStringArray( const char *resourceTag,
int32_t& count,
UErrorCode& err) const
{
UnicodeString *result;
StringList *sldata;
int32_t len=0;
if(U_FAILURE(err)) {
return 0;
}
((ResourceBundle &)(*this)).initItemCache(err); // Semantically const
sldata = (StringList *)uhash_get(fItemCache, resourceTag);
if(sldata == 0) {
UResourceBundle array;
ures_setIsStackObject(&array, TRUE);
UErrorCode fallbackInfo = U_ZERO_ERROR;
ures_getByKey(resource, resourceTag, &array, &fallbackInfo);
if(U_SUCCESS(fallbackInfo)) {
count = ures_getSize(&array);
result = new UnicodeString[count];
const UChar *string = 0;
for(int32_t i=0; i<count; i++) {
string = ures_getStringByIndex(&array, i, &len, &err);
(result+i)->setTo(TRUE, string, len);
}
ures_close(&array);
sldata = new StringList(result, count);
} else {
err = U_MISSING_RESOURCE_ERROR;
return 0;
}
sldata->fCreationStatus = fallbackInfo;
uhash_put(fItemCache, (void *)resourceTag, sldata, &err);
err = fallbackInfo;
} else {
count = sldata->fCount;
err = sldata->fCreationStatus;
}
return sldata->fStrings;
}
const UnicodeString*
ResourceBundle::getArrayItem( const char *resourceTag,
int32_t indexS,
UErrorCode& err) const
{
int32_t num;
const UnicodeString *array = getStringArray(resourceTag, num, err);
if(U_FAILURE(err) || indexS<0 || indexS>=num) {
err = U_MISSING_RESOURCE_ERROR;
return 0;
} else {
return &array[indexS];
}
}
const UnicodeString**
ResourceBundle::get2dArray(const char *resourceTag,
int32_t& rowCount,
int32_t& columnCount,
UErrorCode& err) const
{
//UnicodeString **result = 0;
UnicodeString **result;
String2dList *sldata = 0;
int32_t len=0;
if(U_FAILURE(err)) {
return 0;
}
((ResourceBundle &)(*this)).initItemCache(err); // Semantically const
sldata = (String2dList *)uhash_get(fItemCache, resourceTag);
if(sldata == 0) {
UResourceBundle array;
ures_setIsStackObject(&array, TRUE);
UErrorCode fallbackInfo = U_ZERO_ERROR;
ures_getByKey(resource, resourceTag, &array, &fallbackInfo);
if(U_SUCCESS(fallbackInfo)) {
rowCount = ures_getSize(&array);
if(rowCount > 0) {
result = new UnicodeString*[rowCount];
UResourceBundle row;
ures_setIsStackObject(&row, TRUE);
ures_getByIndex(&array, 0, &row, &err);
columnCount = ures_getSize(&row);
const UChar* string = 0;
for(int32_t i=0; i<rowCount; i++) {
*(result+i) = new UnicodeString[columnCount];
ures_getByIndex(&array, i, &row, &err);
for(int32_t j=0; j<columnCount; j++) {
string = ures_getStringByIndex(&row, j, &len, &err);
(*(result+i)+j)->setTo(TRUE, string, len);
}
ures_close(&row);
}
sldata = new String2dList(result, rowCount, columnCount);
sldata->fCreationStatus = fallbackInfo;
uhash_put(fItemCache, (void *)resourceTag, sldata, &err);
err = fallbackInfo;
}
ures_close(&array);
} else {
err = U_MISSING_RESOURCE_ERROR;
return 0;
}
} else {
rowCount = sldata->fRowCount;
columnCount = sldata->fColCount;
err = sldata->fCreationStatus;
}
return (const UnicodeString**)sldata->fStrings;
}
const UnicodeString*
ResourceBundle::get2dArrayItem(const char *resourceTag,
int32_t rowIndex,
int32_t columnIndex,
UErrorCode& err) const
{
int32_t rows = 0;
int32_t columns = 0;
const UnicodeString** array= get2dArray(resourceTag, rows, columns, err);
if(array == 0 || rowIndex < 0 || columnIndex < 0 || rowIndex >= rows || columnIndex >= columns) {
err = U_MISSING_RESOURCE_ERROR;
return 0;
} else {
return &array[rowIndex][columnIndex];
}
}
const UnicodeString*
ResourceBundle::getTaggedArrayItem( const char *resourceTag,
const UnicodeString& itemTag,
UErrorCode& err) const
{
StringList *sldata = 0;
int32_t len = 0;
if(U_FAILURE(err)) {
return 0;
}
char item[256];
char key[256];
int32_t taglen = itemTag.length();
itemTag.extract(0, taglen, key, "");
key[taglen] = '\0';
itemTag.extract(0, taglen, item, "");
item[taglen] = '\0';
uprv_strcat(key, resourceTag);
((ResourceBundle &)(*this)).initItemCache(err); // Semantically const
sldata = (StringList *)uhash_get(fItemCache, key);
if(sldata == 0) {
UResourceBundle table;
ures_setIsStackObject(&table, TRUE);
UErrorCode fallbackInfo = U_ZERO_ERROR;
ures_getByKey(resource, resourceTag, &table, &fallbackInfo);
if(U_SUCCESS(fallbackInfo)) {
const UChar *result = ures_getStringByKey(&table, item, &len, &err);
if(result != 0) {
UnicodeString *t = new UnicodeString[1];
t->setTo(TRUE, result, len);
sldata = new StringList(t, 1);
} else {
err = U_MISSING_RESOURCE_ERROR;
return 0;
}
ures_close(&table);
sldata->fCreationStatus = fallbackInfo;
uhash_put(fItemCache, key, sldata, &err);
err = fallbackInfo;
} else {
err = U_MISSING_RESOURCE_ERROR;
return 0;
}
} else {
err = sldata->fCreationStatus;
}
return sldata->fStrings;
}
void
ResourceBundle::getTaggedArray( const char *resourceTag,
UnicodeString*& itemTags,
UnicodeString*& items,
int32_t& numItems,
UErrorCode& err) const
{
if(U_FAILURE(err)) {
return;
}
UResourceBundle table;
ures_setIsStackObject(&table, TRUE);
ures_getByKey(resource, resourceTag, &table, &err);
if(U_SUCCESS(err)) {
numItems = ures_getSize(&table);
itemTags = new UnicodeString[numItems];
items = new UnicodeString[numItems];
const UChar *value = 0;
const char *key = 0;
int32_t len = 0;
int16_t indexR = -1;
res_getNextStringTableItem(&(table.fResData), table.fRes, &value, &key, &len, &indexR);
while(value != 0) {
items[indexR-1].setTo(value);
itemTags[indexR-1].setTo(key);
res_getNextStringTableItem(&(table.fResData), table.fRes, &value, &key, &len, &indexR);
}
} else {
err = U_MISSING_RESOURCE_ERROR;
return;
}
}
#endif
//eof