271 lines
8.0 KiB
C
271 lines
8.0 KiB
C
/*
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*******************************************************************************
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* *
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* Copyright (C) 1999-2001, International Business Machines Corporation *
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* and others. All Rights Reserved. *
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* *
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*******************************************************************************
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* file name: uresdata.c
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* encoding: US-ASCII
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 1999dec08
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* created by: Markus W. Scherer
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* Modification History:
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*
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* Date Name Description
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* 06/20/2000 helena OS/400 port changes; mostly typecast.
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*/
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#include "unicode/utypes.h"
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#include "cstring.h"
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#include "cmemory.h"
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#include "unicode/udata.h"
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#include "uresdata.h"
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#include "uresimp.h"
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/*
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* Resource access helpers
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*/
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/* get a const char* pointer to the key with the keyOffset byte offset from pRoot */
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#define RES_GET_KEY(pRoot, keyOffset) ((const char *)(pRoot)+(keyOffset))
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#define URESDATA_ITEM_NOT_FOUND 0xFFFF
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/*
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* All the type-access functions assume that
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* the resource is of the expected type.
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*/
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/*
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* Array functions
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*/
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static Resource
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_res_getArrayItem(Resource *pRoot, Resource res, int32_t indexR) {
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int32_t *p=(int32_t *)RES_GET_POINTER(pRoot, res);
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if(indexR<*p) {
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return ((Resource *)(p))[1+indexR];
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} else {
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return RES_BOGUS; /* indexR>itemCount */
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}
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}
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/*
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* Table functions
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*
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* Important: the key offsets are 16-bit byte offsets from pRoot,
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* and the itemCount is one more 16-bit, too.
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* Thus, there are (count+1) uint16_t values.
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* In order to 4-align the Resource item values, there is a padding
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* word if count is even, i.e., there is exactly (~count&1)
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* 16-bit padding words.
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*/
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static const char *
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_res_getTableKey(const Resource *pRoot, const Resource res, uint16_t indexS) {
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uint16_t *p=(uint16_t *)RES_GET_POINTER(pRoot, res);
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if(indexS<*p) {
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return RES_GET_KEY(pRoot, p[indexS+1]);
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} else {
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return NULL; /* indexS>itemCount */
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}
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}
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static Resource
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_res_getTableItem(const Resource *pRoot, const Resource res, uint16_t indexR) {
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uint16_t *p=(uint16_t *)RES_GET_POINTER(pRoot, res);
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uint16_t count=*p;
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if(indexR<count) {
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return ((Resource *)(p+1+count+(~count&1)))[indexR];
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} else {
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return RES_BOGUS; /* indexR>itemCount */
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}
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}
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static Resource
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_res_findTableItem(const Resource *pRoot, const Resource res, const char *key) {
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uint16_t *p=(uint16_t *)RES_GET_POINTER(pRoot, res);
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uint16_t i, start, limit;
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limit=*p++; /* number of entries */
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if(limit == 0) { /* this table is empty */
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return RES_BOGUS;
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}
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/* do a binary search for the key */
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start=0;
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while(start<limit-1) {
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i=(uint16_t)((start+limit)/2);
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if(uprv_strcmp(key, RES_GET_KEY(pRoot, p[i]))<0) {
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limit=i;
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} else {
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start=i;
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}
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}
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/* did we really find it? */
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if(uprv_strcmp(key, RES_GET_KEY(pRoot, p[start]))==0) {
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limit=*(p-1); /* itemCount */
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return ((Resource *)(p+limit+(~limit&1)))[start];
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} else {
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return RES_BOGUS; /* not found */
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}
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}
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static uint16_t
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_res_findTableIndex(const Resource *pRoot, const Resource res, const char *key) {
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uint16_t *p=(uint16_t *)RES_GET_POINTER(pRoot, res);
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uint16_t i, start, limit;
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limit=*p++; /* number of entries */
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/* do a binary search for the key */
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start=0;
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while(start<limit-1) {
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i=(uint16_t)((start+limit)/2);
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if(uprv_strcmp(key, RES_GET_KEY(pRoot, p[i]))<0) {
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limit=i;
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} else {
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start=i;
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}
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}
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/* did we really find it? */
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if(uprv_strcmp(key, RES_GET_KEY(pRoot, p[start]))==0) {
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limit=*(p-1); /* itemCount */
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return start;
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} else {
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return URESDATA_ITEM_NOT_FOUND; /* not found */
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}
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}
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/* helper for res_load() ---------------------------------------------------- */
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static UBool
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isAcceptable(void *context,
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const char *type, const char *name,
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const UDataInfo *pInfo) {
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return (UBool)(
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pInfo->size>=20 &&
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pInfo->isBigEndian==U_IS_BIG_ENDIAN &&
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pInfo->charsetFamily==U_CHARSET_FAMILY &&
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pInfo->sizeofUChar==U_SIZEOF_UCHAR &&
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pInfo->dataFormat[0]==0x52 && /* dataFormat="ResB" */
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pInfo->dataFormat[1]==0x65 &&
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pInfo->dataFormat[2]==0x73 &&
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pInfo->dataFormat[3]==0x42 &&
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pInfo->formatVersion[0]==1);
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}
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/* semi-public functions ---------------------------------------------------- */
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U_CFUNC UBool
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res_load(ResourceData *pResData,
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const char *path, const char *name, UErrorCode *errorCode) {
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/* load the ResourceBundle file */
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pResData->data=udata_openChoice(path, "res", name, isAcceptable, NULL, errorCode);
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if(U_FAILURE(*errorCode)) {
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return FALSE;
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}
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/* get its memory and root resource */
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pResData->pRoot=(Resource *)udata_getMemory(pResData->data);
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pResData->rootRes=*pResData->pRoot;
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/* currently, we accept only resources that have a Table as their roots */
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if(RES_GET_TYPE(pResData->rootRes)!=RES_TABLE) {
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udata_close(pResData->data);
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pResData->data=NULL;
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return FALSE;
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}
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return TRUE;
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}
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U_CFUNC void
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res_unload(ResourceData *pResData) {
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if(pResData->data!=NULL) {
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udata_close(pResData->data);
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pResData->data=NULL;
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}
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}
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U_CFUNC const UChar *
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res_getString(const ResourceData *pResData, const Resource res, int32_t *pLength) {
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if(res!=RES_BOGUS && RES_GET_TYPE(res)==RES_STRING) {
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int32_t *p=(int32_t *)RES_GET_POINTER(pResData->pRoot, res);
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*pLength=*p++;
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return (UChar *)p;
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} else {
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*pLength=0;
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return NULL;
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}
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}
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U_CFUNC const uint8_t *
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res_getBinary(const ResourceData *pResData, const Resource res, int32_t *pLength) {
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int32_t *p=(int32_t *)RES_GET_POINTER(pResData->pRoot, res);
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*pLength=*p++;
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return (uint8_t *)p;
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}
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U_CFUNC int32_t
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res_countArrayItems(const ResourceData *pResData, const Resource res) {
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if(res!=RES_BOGUS) {
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if(RES_GET_TYPE(res)==RES_STRING) {
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return 1;
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} else if(RES_GET_TYPE(res)==RES_ARRAY) {
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Resource *p=RES_GET_POINTER(pResData->pRoot, res);
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int32_t count=*(int32_t *)p;
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return count;
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} else if(RES_GET_TYPE(res)==RES_TABLE) {
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return res_getTableSize(pResData, res);
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}
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}
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return 0;
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}
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U_CFUNC Resource
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res_getResource(const ResourceData *pResData, const char *key) {
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return _res_findTableItem(pResData->pRoot, pResData->rootRes, key);
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}
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U_CFUNC Resource res_getArrayItem(const ResourceData *pResData, const Resource array, const int32_t indexR) {
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return _res_getArrayItem(pResData->pRoot, array, indexR);
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}
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U_CFUNC Resource res_getTableItemByKey(const ResourceData *pResData, const Resource table, int32_t* indexR, const char* * key) {
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uint16_t tempIndex;
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if(key != NULL) {
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tempIndex = _res_findTableIndex(pResData->pRoot, table, *key);
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if(tempIndex != URESDATA_ITEM_NOT_FOUND) {
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*key = _res_getTableKey(pResData->pRoot, table, tempIndex);
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*indexR = tempIndex;
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return _res_getTableItem(pResData->pRoot, table, tempIndex);
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} else {
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return RES_BOGUS;
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}
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} else {
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return RES_BOGUS;
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}
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}
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U_CFUNC Resource res_getTableItemByIndex(const ResourceData *pResData, const Resource table, int32_t indexR, const char * * key) {
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if(indexR>-1) {
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if(key != NULL) {
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*key = _res_getTableKey(pResData->pRoot, table, (uint16_t)indexR);
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}
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return _res_getTableItem(pResData->pRoot, table, (uint16_t)indexR);
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} else {
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return RES_BOGUS;
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}
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}
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U_CFUNC int32_t res_getTableSize(const ResourceData *pResData, Resource table) {
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uint16_t *p=(uint16_t *)RES_GET_POINTER(pResData->pRoot, table);
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return *p;
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}
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