// © 2016 and later: Unicode, Inc. and others.

// License & terms of use: http://www.unicode.org/copyright.html

/*

**********************************************************************

*   Copyright (C) 2000-2016, International Business Machines

*   Corporation and others.  All Rights Reserved.

**********************************************************************

*/

#ifndef URESIMP_H

#define URESIMP_H

#include "unicode/ures.h"

#include "unicode/utypes.h"

#include "uresdata.h"

#define kRootLocaleName         "root"

#define kPoolBundleName         "pool"

/*

 The default minor version and the version separator must be exactly one

 character long.

*/

#define kDefaultMinorVersion    "0"

#define kVersionSeparator       "."

#define kVersionTag             "Version"

#define MAGIC1 19700503

#define MAGIC2 19641227

#define URES_MAX_ALIAS_LEVEL 256

#define URES_MAX_BUFFER_SIZE 256

#define EMPTY_SET 0x2205

struct UResourceDataEntry;

typedef struct UResourceDataEntry UResourceDataEntry;

/*

 * Note: If we wanted to make this structure smaller, then we could try

 * to use one UResourceDataEntry pointer for fAlias and fPool, with a separate

 * flag to distinguish whether this struct is for a real bundle with a pool,

 * or for an alias entry for which we won't use the pool after loading.

 */

struct UResourceDataEntry {

    char *fName; /* name of the locale for bundle - still to decide whether it is original or fallback */

    char *fPath; /* path to bundle - used for distinguishing between resources with the same name */

    UResourceDataEntry *fParent; /*next resource in fallback chain*/

    UResourceDataEntry *fAlias;

    UResourceDataEntry *fPool;

    ResourceData fData; /* data for low level access */

    char fNameBuffer[3]; /* A small buffer of free space for fName. The free space is due to struct padding. */

    uint32_t fCountExisting; /* how much is this resource used */

    UErrorCode fBogus;

    /* int32_t fHashKey;*/ /* for faster access in the hashtable */

};

#define RES_BUFSIZE 64

#define RES_PATH_SEPARATOR   '/'

#define RES_PATH_SEPARATOR_S   "/"

struct UResourceBundle {

    const char *fKey; /*tag*/

    UResourceDataEntry *fData; /*for low-level access*/

    char *fVersion;

    UResourceDataEntry *fTopLevelData; /* for getting the valid locale */

    char *fResPath; /* full path to the resource: "zh_TW/CollationElements/Sequence" */

    // TODO(ICU-20769): Try to change the by-value fResData into a pointer,

    // with the struct in only one place for each bundle.

    // Also replace class ResourceDataValue.resData with a pResData pointer again.

    ResourceData fResData;

    char fResBuf[RES_BUFSIZE];

    int32_t fResPathLen;

    Resource fRes;

    UBool fHasFallback;

    UBool fIsTopLevel;

    uint32_t fMagic1;   /* For determining if it's a stack object */

    uint32_t fMagic2;   /* For determining if it's a stack object */

    int32_t fIndex;

    int32_t fSize;

    /*const UResourceBundle *fParentRes;*/ /* needed to get the actual locale for a child resource */

};

U_CAPI void U_EXPORT2 ures_initStackObject(UResourceBundle* resB);

#ifdef __cplusplus

U_NAMESPACE_BEGIN

/**

 * \class StackUResourceBundle

 * "Smart pointer" like class, closes a UResourceBundle via ures_close().

 *

 * This code:

 *

 *   StackUResourceBundle bundle;

 *   foo(bundle.getAlias());

 *

 * Is equivalent to this code:

 *

 *   UResourceBundle bundle;

 *   ures_initStackObject(&bundle);

 *   foo(&bundle);

 *   ures_close(&bundle);

 *

 * @see LocalUResourceBundlePointer

 * @internal

 */

class U_COMMON_API StackUResourceBundle {

public:

    // No heap allocation. Use only on the stack.

    static void* U_EXPORT2 operator new(size_t) U_NOEXCEPT = delete;

    static void* U_EXPORT2 operator new[](size_t) U_NOEXCEPT = delete;

#if U_HAVE_PLACEMENT_NEW

    static void* U_EXPORT2 operator new(size_t, void*) U_NOEXCEPT = delete;

#endif

    StackUResourceBundle();

    ~StackUResourceBundle();

    UResourceBundle* getAlias() { return &bundle; }

    UResourceBundle& ref() { return bundle; }

    const UResourceBundle& ref() const { return bundle; }

    StackUResourceBundle(const StackUResourceBundle&) = delete;

    StackUResourceBundle& operator=(const StackUResourceBundle&) = delete;

    StackUResourceBundle(StackUResourceBundle&&) = delete;

    StackUResourceBundle& operator=(StackUResourceBundle&&) = delete;

private:

    UResourceBundle bundle;

};

U_NAMESPACE_END

#endif  /* __cplusplus */

/**

 * Opens a resource bundle for the locale;

 * if there is not even a base language bundle, then loads the root bundle;

 * never falls back to the default locale.

 *

 * This is used for algorithms that have good pan-Unicode default behavior,

 * such as case mappings, collation, and segmentation (BreakIterator).

 */

U_CAPI UResourceBundle* U_EXPORT2

ures_openNoDefault(const char* path, const char* localeID, UErrorCode* status);

/* Some getters used by the copy constructor */

U_CFUNC const char* ures_getName(const UResourceBundle* resB);

#ifdef URES_DEBUG

U_CFUNC const char* ures_getPath(const UResourceBundle* resB);

/**

 * If anything was in the RB cache, dump it to the screen.

 * @return true if there was anything into the cache

 */

U_CAPI UBool U_EXPORT2 ures_dumpCacheContents(void);

#endif

/*U_CFUNC void ures_appendResPath(UResourceBundle *resB, const char* toAdd, int32_t lenToAdd);*/

/*U_CFUNC void ures_setResPath(UResourceBundle *resB, const char* toAdd);*/

/*U_CFUNC void ures_freeResPath(UResourceBundle *resB);*/

/* Candidates for export */

U_CFUNC UResourceBundle *ures_copyResb(UResourceBundle *r, const UResourceBundle *original, UErrorCode *status);

/**

 * Returns a resource that can be located using the pathToResource argument. One needs optional package, locale

 * and path inside the locale, for example: "/myData/en/zoneStrings/3". Keys and indexes are supported. Keys

 * need to reference data in named structures, while indexes can reference both named and anonymous resources.

 * Features a fill-in parameter. 

 * 

 * Note, this function does NOT have a syntax for specifying items within a tree.  May want to consider a

 * syntax that delineates between package/tree and resource.  

 *

 * @param pathToResource    a path that will lead to the requested resource

 * @param fillIn            if NULL a new UResourceBundle struct is allocated and must be deleted by the caller.

 *                          Alternatively, you can supply a struct to be filled by this function.

 * @param status            fills in the outgoing error code.

 * @return                  a pointer to a UResourceBundle struct. If fill in param was NULL, caller must delete it

 */

U_CAPI UResourceBundle* U_EXPORT2

ures_findResource(const char* pathToResource, 

                  UResourceBundle *fillIn, UErrorCode *status); 

/**

 * Returns a sub resource that can be located using the pathToResource argument. One needs a path inside 

 * the supplied resource, for example, if you have "en_US" resource bundle opened, you might ask for

 * "zoneStrings/3". Keys and indexes are supported. Keys

 * need to reference data in named structures, while indexes can reference both 

 * named and anonymous resources.

 * Features a fill-in parameter. 

 *

 * @param resourceBundle    a resource

 * @param pathToResource    a path that will lead to the requested resource

 * @param fillIn            if NULL a new UResourceBundle struct is allocated and must be deleted by the caller.

 *                          Alternatively, you can supply a struct to be filled by this function.

 * @param status            fills in the outgoing error code.

 * @return                  a pointer to a UResourceBundle struct. If fill in param was NULL, caller must delete it

 */

U_CAPI UResourceBundle* U_EXPORT2

ures_findSubResource(const UResourceBundle *resB, 

                     char* pathToResource, 

                     UResourceBundle *fillIn, UErrorCode *status);

/**

 * Returns a functionally equivalent locale (considering keywords) for the specified keyword.

 * @param result fillin for the equivalent locale

 * @param resultCapacity capacity of the fillin buffer

 * @param path path to the tree, or NULL for ICU data

 * @param resName top level resource. Example: "collations"

 * @param keyword locale keyword. Example: "collation"

 * @param locid The requested locale

 * @param isAvailable If non-null, pointer to fillin parameter that indicates whether the 

 * requested locale was available. The locale is defined as 'available' if it physically 

 * exists within the specified tree.

 * @param omitDefault if true, omit keyword and value if default. 'de_DE\@collation=standard' -> 'de_DE'

 * @param status error code

 * @return  the actual buffer size needed for the full locale.  If it's greater 

 * than resultCapacity, the returned full name will be truncated and an error code will be returned.

 */

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);

/**

 * Given a tree path and keyword, return a string enumeration of all possible values for that keyword.

 * @param path path to the tree, or NULL for ICU data

 * @param keyword a particular keyword to consider, must match a top level resource name 

 * within the tree.

 * @param status error code

 */

U_CAPI UEnumeration* U_EXPORT2

ures_getKeywordValues(const char *path, const char *keyword, UErrorCode *status);

/**

 * Get a resource with multi-level fallback. Normally only the top level resources will

 * fallback to its parent. This performs fallback on subresources. For example, when a table

 * is defined in a resource bundle and a parent resource bundle, normally no fallback occurs

 * on the sub-resources because the table is defined in the current resource bundle, but this

 * function can perform fallback on the sub-resources of the table.

 * @param resB              a resource

 * @param inKey             a key associated with the requested resource

 * @param fillIn            if NULL a new UResourceBundle struct is allocated and must be deleted by the caller.

 *                          Alternatively, you can supply a struct to be filled by this function.

 * @param status: fills in the outgoing error code

 *                could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found

 *                could be a non-failing error 

 *                e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_DEFAULT_WARNING </TT>

 * @return                  a pointer to a UResourceBundle struct. If fill in param was NULL, caller must delete it

 */

U_CAPI UResourceBundle* U_EXPORT2 

ures_getByKeyWithFallback(const UResourceBundle *resB, 

                          const char* inKey, 

                          UResourceBundle *fillIn, 

                          UErrorCode *status);

/**

 * Get a String with multi-level fallback. Normally only the top level resources will

 * fallback to its parent. This performs fallback on subresources. For example, when a table

 * is defined in a resource bundle and a parent resource bundle, normally no fallback occurs

 * on the sub-resources because the table is defined in the current resource bundle, but this

 * function can perform fallback on the sub-resources of the table.

 * @param resB              a resource

 * @param inKey             a key associated with the requested resource

 * @param len               if not NULL, used to return the length of the string

 * @param status: fills in the outgoing error code

 *                could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found

 *                could be a non-failing error 

 *                e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_DEFAULT_WARNING </TT>

 * @return returns a pointer to a zero-terminated UChar array which lives in a

 *         memory mapped/DLL file.

 */

U_CAPI const UChar* U_EXPORT2 

ures_getStringByKeyWithFallback(const UResourceBundle *resB, 

                          const char* inKey,  

                          int32_t* len,

                          UErrorCode *status);

#ifdef __cplusplus

U_CAPI void U_EXPORT2

ures_getValueWithFallback(const UResourceBundle *bundle, const char *path,

                          UResourceBundle *tempFillIn,

                          icu::ResourceDataValue &value, UErrorCode &errorCode);

U_CAPI void U_EXPORT2

ures_getAllItemsWithFallback(const UResourceBundle *bundle, const char *path,

                             icu::ResourceSink &sink, UErrorCode &errorCode);

#endif  /* __cplusplus */

/**

 * Get a version number by key

 * @param resB bundle containing version number

 * @param key the key for the version number

 * @param ver fillin for the version number

 * @param status error code

 */

U_CAPI void U_EXPORT2

ures_getVersionByKey(const UResourceBundle *resB,

                     const char *key,

                     UVersionInfo ver,

                     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

 */

U_CAPI const char* U_EXPORT2 

ures_getVersionNumberInternal(const UResourceBundle *resourceBundle);

/**

 * Return the name of the Locale associated with this ResourceBundle. This API allows

 * you to query for the real locale of the resource. For example, if you requested 

 * "en_US_CALIFORNIA" and only "en_US" bundle exists, "en_US" will be returned. 

 * For subresources, the locale where this resource comes from will be returned.

 * If fallback has occurred, getLocale will reflect this.

 *

 * This internal version avoids deprecated-warnings in ICU code.

 *

 * @param resourceBundle resource bundle in question

 * @param status just for catching illegal arguments

 * @return  A Locale name

 */

U_CAPI const char* U_EXPORT2 

ures_getLocaleInternal(const UResourceBundle* resourceBundle, 

               UErrorCode* status);

/**

 * Same as ures_openDirect() but uses the fill-in parameter instead of allocating a new bundle.

 * 

 * @param r The existing UResourceBundle to fill in. If NULL then status will be

 *          set to U_ILLEGAL_ARGUMENT_ERROR.

 * @param packageName   The packageName and locale together point to an ICU udata object,

 *                      as defined by <code> udata_open( packageName, "res", locale, err) </code>

 *                      or equivalent.  Typically, packageName will refer to a (.dat) file, or to

 *                      a package registered with udata_setAppData(). Using a full file or directory

 *                      pathname for packageName is deprecated. If NULL, ICU data will be used.

 * @param locale  specifies the locale for which we want to open the resource

 *                if NULL, the default locale will be used. If strlen(locale) == 0

 *                root locale will be used.

 * @param status The error code.

 * @see ures_openDirect

 * @internal

 */

U_CAPI void U_EXPORT2

ures_openDirectFillIn(UResourceBundle *r,

                      const char *packageName,

                      const char *locale,

                      UErrorCode *status);

#endif /*URESIMP_H*/