icuSources/common/icudataver.c

   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 }