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

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
******************************************************************************
* Copyright (C) 1997-2016, International Business Machines Corporation and
* others. All Rights Reserved.
******************************************************************************
*
* File uresbund.cpp
*
* Modification History:
*
*   Date        Name        Description
*   04/01/97    aliu        Creation.
*   06/14/99    stephen     Removed functions taking a filename suffix.
*   07/20/99    stephen     Changed for UResourceBundle typedef'd to void*
*   11/09/99    weiv            Added ures_getLocale()
*   March 2000  weiv        Total overhaul - using data in DLLs
*   06/20/2000  helena      OS/400 port changes; mostly typecast.
*   06/24/02    weiv        Added support for resource sharing
******************************************************************************
*/

#include "unicode/ures.h"
#include "unicode/ustring.h"
#include "unicode/ucnv.h"
#include "bytesinkutil.h"
#include "charstr.h"
#include "uresimp.h"
#include "ustr_imp.h"
#include "cwchar.h"
#include "ucln_cmn.h"
#include "cmemory.h"
#include "cstring.h"
#include "mutex.h"
#include "uhash.h"
#include "unicode/uenum.h"
#include "uenumimp.h"
#include "ulocimp.h"
#include "umutex.h"
#include "putilimp.h"
#include "uassert.h"
#include "uresdata.h"

usingnamespaceicu;

/*
Static cache for already opened resource bundles - mostly for keeping fallback info
TODO: This cache should probably be removed when the deprecated code is
      completely removed.
*/
static UHashtable *cache = …;
static icu::UInitOnce gCacheInitOnce { … };

static UMutex resbMutex;

/* INTERNAL: hashes an entry  */
static int32_t U_CALLCONV hashEntry(const UHashTok parm) { … }

/* INTERNAL: compares two entries */
static UBool U_CALLCONV compareEntries(const UHashTok p1, const UHashTok p2) { … }


/**
 *  Internal function, gets parts of locale name according 
 *  to the position of '_' character
 */
static UBool chopLocale(char *name) { … }

static UBool hasVariant(const char* localeID) { … }

// This file contains the tables for doing locale fallback, which are generated
// by the CLDR-to-ICU process directly from the CLDR data.  This file should only
// ever be included from here.
#define INCLUDED_FROM_URESBUND_CPP
#include "localefallback_data.h"

static const char* performFallbackLookup(const char* key,
                                         const char* keyStrs,
                                         const char* valueStrs,
                                         const int32_t* lookupTable,
                                         int32_t lookupTableLength) { … }

static CharString getDefaultScript(const CharString& language, const CharString& region) { … }

enum UResOpenType { … };
UResOpenType;

/**
 *  Internal function, determines the search path for resource bundle files.
 *  Currently, this function is used only by findFirstExisting() to help search for resource bundle files when a bundle for the specified
 *  locale doesn't exist.  The code that supports inheritance of resources between existing resource bundle files continues to
 *  use chopLocale() below.
 *  @param name In-out parameter: On input, the locale ID to get a parent locale ID for (this is a locale's base name, without keywords); on output, the
 *  requested parent locale ID.
 *  @param origName The original locale ID the caller of findFirstExisting() requested.  This is the same as `name` on the first call to this function,
 *  but as findFirstExisting() ascends the resource bundle's parent tree, this parameter will continue to be the original locale ID requested.
 */
static bool getParentLocaleID(char *name, const char *origName, UResOpenType openType) { … }

/**
 *  Called to check whether a name without '_' needs to be checked for a parent.
 *  Some code had assumed that locale IDs with '_' could not have a non-root parent.
 *  We may want a better way of doing this.
 */
static UBool mayHaveParent(char *name) { … }

/**
 *  Internal function
 */
static void entryIncrease(UResourceDataEntry *entry) { … }

/**
 *  Internal function. Tries to find a resource in given Resource
 *  Bundle, as well as in its parents
 */
static UResourceDataEntry *getFallbackData(
        const UResourceBundle *resBundle,
        const char **resTag, Resource *res, UErrorCode *status) { … }

static void
free_entry(UResourceDataEntry *entry) { … }

/* Works just like ucnv_flushCache() */
static int32_t ures_flushCache()
{ … }

#ifdef URES_DEBUG
#include <stdio.h>

U_CAPI UBool U_EXPORT2 ures_dumpCacheContents() {
  UBool cacheNotEmpty = false;
  int32_t pos = UHASH_FIRST;
  const UHashElement *e;
  UResourceDataEntry *resB;
  
    Mutex lock(&resbMutex);
    if (cache == nullptr) {
      fprintf(stderr,"%s:%d: RB Cache is nullptr.\n", __FILE__, __LINE__);
      return false;
    }

    while ((e = uhash_nextElement(cache, &pos)) != nullptr) {
      cacheNotEmpty=true;
      resB = (UResourceDataEntry *) e->value.pointer;
      fprintf(stderr,"%s:%d: RB Cache: Entry @0x%p, refcount %d, name %s:%s.  Pool 0x%p, alias 0x%p, parent 0x%p\n",
              __FILE__, __LINE__,
              (void*)resB, resB->fCountExisting,
              resB->fName?resB->fName:"nullptr",
              resB->fPath?resB->fPath:"nullptr",
              (void*)resB->fPool,
              (void*)resB->fAlias,
              (void*)resB->fParent);       
    }
    
    fprintf(stderr,"%s:%d: RB Cache still contains %d items.\n", __FILE__, __LINE__, uhash_count(cache));
    return cacheNotEmpty;
}

#endif

static UBool U_CALLCONV ures_cleanup()
{ … }

/** INTERNAL: Initializes the cache for resources */
static void U_CALLCONV createCache(UErrorCode &status) { … }
     
static void initCache(UErrorCode *status) { … }

/** INTERNAL: sets the name (locale) of the resource bundle to given name */

static void setEntryName(UResourceDataEntry *res, const char *name, UErrorCode *status) { … }

static UResourceDataEntry *
getPoolEntry(const char *path, UErrorCode *status);

/**
 *  INTERNAL: Inits and opens an entry from a data DLL.
 *    CAUTION:  resbMutex must be locked when calling this function.
 */
static UResourceDataEntry *init_entry(const char *localeID, const char *path, UErrorCode *status) { … }

static UResourceDataEntry *
getPoolEntry(const char *path, UErrorCode *status) { … }

/* INTERNAL: */
/*   CAUTION:  resbMutex must be locked when calling this function! */
static UResourceDataEntry *
findFirstExisting(const char* path, char* name, const char* defaultLocale, UResOpenType openType,
                  UBool *isRoot, UBool *foundParent, UBool *isDefault, UErrorCode* status) { … }

static void ures_setIsStackObject( UResourceBundle* resB, UBool state) { … }

static UBool ures_isStackObject(const UResourceBundle* resB) { … }


U_CFUNC void ures_initStackObject(UResourceBundle* resB) { … }

U_NAMESPACE_BEGIN

StackUResourceBundle::StackUResourceBundle() { … }

StackUResourceBundle::~StackUResourceBundle() { … }

U_NAMESPACE_END

static UBool  // returns U_SUCCESS(*status)
loadParentsExceptRoot(UResourceDataEntry *&t1,
                      char name[], int32_t nameCapacity,
                      UBool usingUSRData, char usrDataPath[], UErrorCode *status) { … }

static UBool  // returns U_SUCCESS(*status)
insertRootBundle(UResourceDataEntry *&t1, UErrorCode *status) { … }

static UResourceDataEntry *entryOpen(const char* path, const char* localeID,
                                     UResOpenType openType, UErrorCode* status) { … }

/**
 * Version of entryOpen() and findFirstExisting() for ures_openDirect(),
 * with no fallbacks.
 * Parent and root locale bundles are loaded if
 * the requested bundle does not have the "nofallback" flag.
 */
static UResourceDataEntry *
entryOpenDirect(const char* path, const char* localeID, UErrorCode* status) { … }

/**
 * Functions to create and destroy resource bundles.
 *     CAUTION:  resbMutex must be locked when calling this function.
 */
/* INTERNAL: */
static void entryCloseInt(UResourceDataEntry *resB) { … }

/** 
 *  API: closes a resource bundle and cleans up.
 */

static void entryClose(UResourceDataEntry *resB) { … }

/*
U_CFUNC void ures_setResPath(UResourceBundle *resB, const char* toAdd) {
  if(resB->fResPath == nullptr) {
    resB->fResPath = resB->fResBuf;
    *(resB->fResPath) = 0;
  } 
  resB->fResPathLen = uprv_strlen(toAdd);
  if(RES_BUFSIZE <= resB->fResPathLen+1) {
    if(resB->fResPath == resB->fResBuf) {
      resB->fResPath = (char *)uprv_malloc((resB->fResPathLen+1)*sizeof(char));
    } else {
      resB->fResPath = (char *)uprv_realloc(resB->fResPath, (resB->fResPathLen+1)*sizeof(char));
    }
  }
  uprv_strcpy(resB->fResPath, toAdd);
}
*/
static void ures_appendResPath(UResourceBundle *resB, const char* toAdd, int32_t lenToAdd, UErrorCode *status) { … }

static void ures_freeResPath(UResourceBundle *resB) { … }

static void
ures_closeBundle(UResourceBundle* resB, UBool freeBundleObj)
{ … }

U_CAPI void  U_EXPORT2
ures_close(UResourceBundle* resB)
{ … }

namespace {

UResourceBundle *init_resb_result(
        UResourceDataEntry *dataEntry, Resource r, const char *key, int32_t idx,
        UResourceDataEntry *validLocaleDataEntry, const char *containerResPath,
        int32_t recursionDepth,
        UResourceBundle *resB, UErrorCode *status);

// TODO: Try to refactor further, so that we output a dataEntry + Resource + (optionally) resPath,
// rather than a UResourceBundle.
// May need to entryIncrease() the resulting dataEntry.
UResourceBundle *getAliasTargetAsResourceBundle(
        const ResourceData &resData, Resource r, const char *key, int32_t idx,
        UResourceDataEntry *validLocaleDataEntry, const char *containerResPath,
        int32_t recursionDepth,
        UResourceBundle *resB, UErrorCode *status) { … }

// Recursive function, should be called only by itself, by its simpler wrapper,
// or by getAliasTargetAsResourceBundle().
UResourceBundle *init_resb_result(
        UResourceDataEntry *dataEntry, Resource r, const char *key, int32_t idx,
        UResourceDataEntry *validLocaleDataEntry, const char *containerResPath,
        int32_t recursionDepth,
        UResourceBundle *resB, UErrorCode *status) { … }

UResourceBundle *init_resb_result(
        UResourceDataEntry *dataEntry, Resource r, const char *key, int32_t idx,
        // validLocaleDataEntry + containerResPath
        const UResourceBundle *container,
        UResourceBundle *resB, UErrorCode *status) { … }

}  // namespace

UResourceBundle *ures_copyResb(UResourceBundle *r, const UResourceBundle *original, UErrorCode *status) { … }

/**
 * Functions to retrieve data from resource bundles.
 */

U_CAPI const char16_t* U_EXPORT2 ures_getString(const UResourceBundle* resB, int32_t* len, UErrorCode* status) { … }

static const char *
ures_toUTF8String(const char16_t *s16, int32_t length16,
                  char *dest, int32_t *pLength,
                  UBool forceCopy,
                  UErrorCode *status) { … }

U_CAPI const char * U_EXPORT2
ures_getUTF8String(const UResourceBundle *resB,
                   char *dest, int32_t *pLength,
                   UBool forceCopy,
                   UErrorCode *status) { … }

U_CAPI const uint8_t* U_EXPORT2 ures_getBinary(const UResourceBundle* resB, int32_t* len, 
                                               UErrorCode*               status) { … }

U_CAPI const int32_t* U_EXPORT2 ures_getIntVector(const UResourceBundle* resB, int32_t* len, 
                                                   UErrorCode*               status) { … }

/* this function returns a signed integer */ 
/* it performs sign extension */
U_CAPI int32_t U_EXPORT2 ures_getInt(const UResourceBundle* resB, UErrorCode *status) { … }

U_CAPI uint32_t U_EXPORT2 ures_getUInt(const UResourceBundle* resB, UErrorCode *status) { … }

U_CAPI UResType U_EXPORT2 ures_getType(const UResourceBundle *resB) { … }

U_CAPI const char * U_EXPORT2 ures_getKey(const UResourceBundle *resB) { … }

U_CAPI int32_t U_EXPORT2 ures_getSize(const UResourceBundle *resB) { … }

static const char16_t* ures_getStringWithAlias(const UResourceBundle *resB, Resource r, int32_t sIndex, int32_t *len, UErrorCode *status) { … }

U_CAPI void U_EXPORT2 ures_resetIterator(UResourceBundle *resB){ … }

U_CAPI UBool U_EXPORT2 ures_hasNext(const UResourceBundle *resB) { … }

U_CAPI const char16_t* U_EXPORT2 ures_getNextString(UResourceBundle *resB, int32_t* len, const char ** key, UErrorCode *status) { … }

U_CAPI UResourceBundle* U_EXPORT2 ures_getNextResource(UResourceBundle *resB, UResourceBundle *fillIn, UErrorCode *status) { … }

U_CAPI UResourceBundle* U_EXPORT2 ures_getByIndex(const UResourceBundle *resB, int32_t indexR, UResourceBundle *fillIn, UErrorCode *status) { … }

U_CAPI const char16_t* U_EXPORT2 ures_getStringByIndex(const UResourceBundle *resB, int32_t indexS, int32_t* len, UErrorCode *status) { … }

U_CAPI const char * U_EXPORT2
ures_getUTF8StringByIndex(const UResourceBundle *resB,
                          int32_t idx,
                          char *dest, int32_t *pLength,
                          UBool forceCopy,
                          UErrorCode *status) { … }

/*U_CAPI const char *ures_getResPath(UResourceBundle *resB) {
  return resB->fResPath;
}*/

U_CAPI UResourceBundle* U_EXPORT2
ures_findResource(const char* path, UResourceBundle *fillIn, UErrorCode *status) 
{ … }

U_CAPI UResourceBundle* U_EXPORT2
ures_findSubResource(const UResourceBundle *resB, char* path, UResourceBundle *fillIn, UErrorCode *status) 
{ … }
U_CAPI const char16_t* U_EXPORT2
ures_getStringByKeyWithFallback(const UResourceBundle *resB, 
                                const char* inKey, 
                                int32_t* len,
                                UErrorCode *status) { … }

/*
  Like res_getTableItemByKey but accepts full paths like "NumberElements/latn/patternsShort".
*/  
static Resource getTableItemByKeyPath(const ResourceData *pResData, Resource table, const char *key) { … }

static void createPath(const char* origResPath,
                       int32_t     origResPathLen,
                       const char* resPath,
                       int32_t     resPathLen,
                       const char* inKey,
                       CharString& path,
                       UErrorCode* status) { … }

U_CAPI UResourceBundle* U_EXPORT2
ures_getByKeyWithFallback(const UResourceBundle *resB,
                          const char* inKey,
                          UResourceBundle *fillIn,
                          UErrorCode *status) { … }

namespace {

void getAllItemsWithFallback(
        const UResourceBundle *bundle, ResourceDataValue &value,
        ResourceSink &sink, UErrorCode &errorCode) { … }

struct GetAllChildrenSink : public ResourceSink { … };

// Virtual destructors must be defined out of line.
GetAllChildrenSink::~GetAllChildrenSink() { … }

U_CAPI void U_EXPORT2
ures_getAllChildrenWithFallback(const UResourceBundle *bundle, const char *path,
                                icu::ResourceSink &sink, UErrorCode &errorCode) { … }

}  // namespace

// Requires a ResourceDataValue fill-in, so that we need not cast from a ResourceValue.
// Unfortunately, the caller must know which subclass to make and pass in.
// Alternatively, we could make it as polymorphic as in Java by
// returning a ResourceValue pointer (possibly wrapped into a LocalPointer)
// that the caller then owns.
//
// Also requires a UResourceBundle fill-in, so that the value's ResourceTracer
// can point to a non-local bundle.
// Without tracing, the child bundle could be a function-local object.
U_CAPI void U_EXPORT2
ures_getValueWithFallback(const UResourceBundle *bundle, const char *path,
                          UResourceBundle *tempFillIn,
                          ResourceDataValue &value, UErrorCode &errorCode) { … }

U_CAPI void U_EXPORT2
ures_getAllItemsWithFallback(const UResourceBundle *bundle, const char *path,
                             icu::ResourceSink &sink, UErrorCode &errorCode) { … }

U_CAPI UResourceBundle* U_EXPORT2 ures_getByKey(const UResourceBundle *resB, const char* inKey, UResourceBundle *fillIn, UErrorCode *status) { … }

U_CAPI const char16_t* U_EXPORT2 ures_getStringByKey(const UResourceBundle *resB, const char* inKey, int32_t* len, UErrorCode *status) { … }

U_CAPI const char * U_EXPORT2
ures_getUTF8StringByKey(const UResourceBundle *resB,
                        const char *key,
                        char *dest, int32_t *pLength,
                        UBool forceCopy,
                        UErrorCode *status) { … }

/* TODO: clean from here down */

/**
 *  INTERNAL: Get the name of the first real locale (not placeholder) 
 *  that has resource bundle data.
 */
U_CAPI const char*  U_EXPORT2
ures_getLocaleInternal(const UResourceBundle* resourceBundle, UErrorCode* status)
{ … }

U_CAPI const char* U_EXPORT2 
ures_getLocale(const UResourceBundle* resourceBundle, 
               UErrorCode* status)
{ … }


U_CAPI const char* U_EXPORT2 
ures_getLocaleByType(const UResourceBundle* resourceBundle, 
                     ULocDataLocaleType type, 
                     UErrorCode* status) { … }

U_CFUNC const char* ures_getName(const UResourceBundle* resB) { … }

#ifdef URES_DEBUG
U_CFUNC const char* ures_getPath(const UResourceBundle* resB) {
  if(resB == nullptr) {
    return nullptr;
  }

  return resB->fData->fPath;
}
#endif

static UResourceBundle*
ures_openWithType(UResourceBundle *r, const char* path, const char* localeID,
                  UResOpenType openType, UErrorCode* status) { … }

U_CAPI UResourceBundle* U_EXPORT2
ures_open(const char* path, const char* localeID, UErrorCode* status) { … }

U_CAPI UResourceBundle* U_EXPORT2
ures_openNoDefault(const char* path, const char* localeID, UErrorCode* status) { … }

/**
 *  Opens a resource bundle without "canonicalizing" the locale name. No fallback will be performed 
 *  or sought. However, alias substitution will happen!
 */
U_CAPI UResourceBundle*  U_EXPORT2
ures_openDirect(const char* path, const char* localeID, UErrorCode* status) { … }

/**
 *  Internal API: This function is used to open a resource bundle 
 *  proper fallback chaining is executed while initialization. 
 *  The result is stored in cache for later fallback search.
 * 
 * Same as ures_open(), but uses the fill-in parameter and does not allocate a new bundle.
 */
U_CAPI void U_EXPORT2
ures_openFillIn(UResourceBundle *r, const char* path,
                const char* localeID, UErrorCode* status) { … }

/**
 * Same as ures_openDirect(), but uses the fill-in parameter and does not allocate a new bundle.
 */
U_CAPI void U_EXPORT2
ures_openDirectFillIn(UResourceBundle *r, const char* path, const char* localeID, UErrorCode* status) { … }

/**
 *  API: Counts members. For arrays and tables, returns number of resources.
 *  For strings, returns 1.
 */
U_CAPI int32_t  U_EXPORT2
ures_countArrayItems(const UResourceBundle* resourceBundle,
                  const char* resourceKey,
                  UErrorCode* status)
{ … }

/**
 * Internal function.
 * Return the version number associated with this ResourceBundle as a string.
 *
 * @param resourceBundle The resource bundle for which the version is checked.
 * @return  A version number string as specified in the resource bundle or its parent.
 *          The caller does not own this string.
 * @see ures_getVersion
 * @internal
 */
U_CAPI const char* U_EXPORT2 
ures_getVersionNumberInternal(const UResourceBundle *resourceBundle)
{ … }

U_CAPI const char*  U_EXPORT2
ures_getVersionNumber(const UResourceBundle*   resourceBundle)
{ … }

U_CAPI void U_EXPORT2 ures_getVersion(const UResourceBundle* resB, UVersionInfo versionInfo) { … }

/** Tree support functions *******************************/
#define INDEX_LOCALE_NAME …
#define INDEX_TAG …
#define DEFAULT_TAG …

#if defined(URES_TREE_DEBUG)
#include <stdio.h>
#endif

ULocalesContext;

static void U_CALLCONV
ures_loc_closeLocales(UEnumeration *enumerator) { … }

static int32_t U_CALLCONV
ures_loc_countLocales(UEnumeration *en, UErrorCode * /*status*/) { … }

U_CDECL_BEGIN


static const char * U_CALLCONV
ures_loc_nextLocale(UEnumeration* en,
                    int32_t* resultLength,
                    UErrorCode* status) { … }

static void U_CALLCONV 
ures_loc_resetLocales(UEnumeration* en, 
                      UErrorCode* /*status*/) { … }

U_CDECL_END

static const UEnumeration gLocalesEnum = …;


U_CAPI UEnumeration* U_EXPORT2
ures_openAvailableLocales(const char *path, UErrorCode *status)
{ … }

static UBool isLocaleInList(UEnumeration *locEnum, const char *locToSearch, UErrorCode *status) { … }

static void getParentForFunctionalEquivalent(const char*      localeID,
                                             UResourceBundle* res,
                                             UResourceBundle* bund1,
                                             char*            parent,
                                             int32_t          parentCapacity) { … }

U_CAPI int32_t U_EXPORT2
ures_getFunctionalEquivalent(char *result, int32_t resultCapacity,
                             const char *path, const char *resName, const char *keyword, const char *locid,
                             UBool *isAvailable, UBool omitDefault, UErrorCode *status)
{ … }

U_CAPI UEnumeration* U_EXPORT2
ures_getKeywordValues(const char *path, const char *keyword, UErrorCode *status)
{ … }
#if 0
/* This code isn't needed, and given the documentation warnings the implementation is suspect */
U_CAPI UBool U_EXPORT2
ures_equal(const UResourceBundle* res1, const UResourceBundle* res2){
    if(res1==nullptr || res2==nullptr){
        return res1==res2; /* pointer comparison */
    }
    if(res1->fKey==nullptr||  res2->fKey==nullptr){
        return (res1->fKey==res2->fKey);
    }else{
        if(uprv_strcmp(res1->fKey, res2->fKey)!=0){
            return false;
        }
    }
    if(uprv_strcmp(res1->fData->fName, res2->fData->fName)!=0){
        return false;
    }
    if(res1->fData->fPath == nullptr||  res2->fData->fPath==nullptr){
        return (res1->fData->fPath == res2->fData->fPath);
    }else{
        if(uprv_strcmp(res1->fData->fPath, res2->fData->fPath)!=0){
            return false;
        }
    }
    if(uprv_strcmp(res1->fData->fParent->fName, res2->fData->fParent->fName)!=0){
        return false;
    }
    if(uprv_strcmp(res1->fData->fParent->fPath, res2->fData->fParent->fPath)!=0){
        return false;
    }
    if(uprv_strncmp(res1->fResPath, res2->fResPath, res1->fResPathLen)!=0){
        return false;
    }
    if(res1->fRes != res2->fRes){
        return false;
    }
    return true;
}
U_CAPI UResourceBundle* U_EXPORT2
ures_clone(const UResourceBundle* res, UErrorCode* status){
    UResourceBundle* bundle = nullptr;
    UResourceBundle* ret = nullptr;
    if(U_FAILURE(*status) || res == nullptr){
        return nullptr;
    }
    bundle = ures_open(res->fData->fPath, res->fData->fName, status);
    if(res->fResPath!=nullptr){
        ret = ures_findSubResource(bundle, res->fResPath, nullptr, status);
        ures_close(bundle);
    }else{
        ret = bundle;
    }
    return ret;
}
U_CAPI const UResourceBundle* U_EXPORT2
ures_getParentBundle(const UResourceBundle* res){
    if(res==nullptr){
        return nullptr;
    }
    return res->fParentRes;
}
#endif

U_CAPI void U_EXPORT2
ures_getVersionByKey(const UResourceBundle* res, const char *key, UVersionInfo ver, UErrorCode *status) { … }

/* eof */