icuSources/common/ucat.c

   1 /*
   2 **********************************************************************
   3 * Copyright (c) 2003, International Business Machines
   4 * Corporation and others.  All Rights Reserved.
   5 **********************************************************************
   6 * Author: Alan Liu
   7 * Created: March 19 2003
   8 * Since: ICU 2.6
   9 **********************************************************************
  10 */
  11 #include "unicode/ucat.h"
  12 #include "unicode/ustring.h"
  13 #include "cstring.h"
  14 #include "uassert.h"
  15
  16 /* Separator between set_num and msg_num */
  17 static const char SEPARATOR = '%';
  18
  19 /* Maximum length of a set_num/msg_num key, incl. terminating zero.
  20  * Longest possible key is "-2147483648%-2147483648" */
  21 #define MAX_KEY_LEN (24)
  22
  23 /**
  24  * Fill in buffer with a set_num/msg_num key string, given the numeric
  25  * values. Numeric values must be >= 0. Buffer must be of length
  26  * MAX_KEY_LEN or more.
  27  */
  28 static char*
  29 _catkey(char* buffer, int32_t set_num, int32_t msg_num) {
  30     int32_t i = 0;
  31     i = T_CString_integerToString(buffer, set_num, 10);
  32     buffer[i++] = SEPARATOR;
  33     T_CString_integerToString(buffer+i, msg_num, 10);
  34     return buffer;
  35 }
  36
  37 U_CAPI u_nl_catd U_EXPORT2
  38 u_catopen(const char* name, const char* locale, UErrorCode* ec) {
  39     return (u_nl_catd) ures_open(name, locale, ec);
  40 }
  41
  42 U_CAPI void U_EXPORT2
  43 u_catclose(u_nl_catd catd) {
  44     ures_close((UResourceBundle*) catd); /* may be NULL */
  45 }
  46
  47 U_CAPI const UChar* U_EXPORT2
  48 u_catgets(u_nl_catd catd, int32_t set_num, int32_t msg_num,
  49           const UChar* s,
  50           int32_t* len, UErrorCode* ec) {
  51
  52     char key[MAX_KEY_LEN];
  53     const UChar* result;
  54
  55     if (ec == NULL || U_FAILURE(*ec)) {
  56         goto ERROR;
  57     }
  58
  59     result = ures_getStringByKey((const UResourceBundle*) catd,
  60                                  _catkey(key, set_num, msg_num),
  61                                  len, ec);
  62     if (U_FAILURE(*ec)) {
  63         goto ERROR;
  64     }
  65
  66     return result;
  67
  68  ERROR:
  69     /* In case of any failure, return s */
  70     if (len != NULL) {
  71         *len = u_strlen(s);
  72     }
  73     return s;
  74 }
  75
  76 /*eof*/