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      1 /*
      2 ******************************************************************************
      3 *
      4 *   Copyright (C) 2009, International Business Machines
      5 *   Corporation and others.  All Rights Reserved.
      6 *
      7 ******************************************************************************
      8 */
      9 
     10 #include "unicode/utypes.h"
     11 #include "unicode/icudataver.h"
     12 #include "unicode/uversion.h"
     13 #include "unicode/ures.h"
     14 #include "uresimp.h" /* for ures_getVersionByKey */
     15 #include "cmemory.h"
     16 
     17 /*
     18  * Determines if icustd is in the data.
     19  */
     20 static UBool hasICUSTDBundle();
     21 
     22 static UBool hasICUSTDBundle() {
     23     UErrorCode status = U_ZERO_ERROR;
     24     UBool result = TRUE;
     25 
     26     UResourceBundle *icustdbundle = ures_openDirect(NULL, U_ICU_STD_BUNDLE, &status);
     27     if (U_SUCCESS(status)) {
     28         result = TRUE;
     29     } else {
     30         result = FALSE;
     31     }
     32 
     33     ures_close(icustdbundle);
     34 
     35     return result;
     36 }
     37 
     38 U_CAPI void U_EXPORT2 u_getDataVersion(UVersionInfo dataVersionFillin, UErrorCode *status) {
     39     UResourceBundle *icudatares = NULL;
     40 
     41     if (U_FAILURE(*status)) {
     42         return;
     43     }
     44 
     45     if (dataVersionFillin != NULL) {
     46         icudatares = ures_openDirect(NULL, U_ICU_VERSION_BUNDLE , status);
     47         if (U_SUCCESS(*status)) {
     48             ures_getVersionByKey(icudatares, U_ICU_DATA_KEY, dataVersionFillin, status);
     49         }
     50         ures_close(icudatares);
     51     }
     52 }
     53 
     54 U_CAPI UBool U_EXPORT2 u_isDataOlder(UVersionInfo dataVersionFillin, UBool *isModifiedFillin, UErrorCode *status) {
     55     UBool result = TRUE;
     56     UVersionInfo dataVersion;
     57     UVersionInfo wiredVersion;
     58 
     59     if (U_FAILURE(*status)) {
     60         return result;
     61     }
     62 
     63     u_getDataVersion(dataVersion, status);
     64     if (U_SUCCESS(*status)) {
     65         u_versionFromString(wiredVersion, U_ICU_DATA_VERSION);
     66 
     67         if (uprv_memcmp(dataVersion, wiredVersion, sizeof(UVersionInfo)) >= 0) {
     68             result = FALSE;
     69         }
     70 
     71         if (dataVersionFillin != NULL) {
     72             uprv_memcpy(dataVersionFillin, dataVersion, sizeof(UVersionInfo));
     73         }
     74 
     75         if (hasICUSTDBundle()) {
     76             *isModifiedFillin = FALSE;
     77         } else {
     78             *isModifiedFillin = TRUE;
     79         }
     80     }
     81 
     82     return result;
     83 }
     84