icuSources/common/ucat.cpp

   1 // © 2016 and later: Unicode, Inc. and others.
   2 // License & terms of use: http://www.unicode.org/copyright.html
   3 /*
   4 **********************************************************************
   5 * Copyright (c) 2003, International Business Machines
   6 * Corporation and others.  All Rights Reserved.
   7 **********************************************************************
   8 * Author: Alan Liu
   9 * Created: March 19 2003
  10 * Since: ICU 2.6
  11 **********************************************************************
  12 */
  13 #include "unicode/ucat.h"
  14 #include "unicode/ustring.h"
  15 #include "cstring.h"
  16 #include "uassert.h"
  17
  18 /* Separator between set_num and msg_num */
  19 static const char SEPARATOR = '%';
  20
  21 /* Maximum length of a set_num/msg_num key, incl. terminating zero.
  22  * Longest possible key is "-2147483648%-2147483648" */
  23 #define MAX_KEY_LEN (24)
  24
  25 /**
  26  * Fill in buffer with a set_num/msg_num key string, given the numeric
  27  * values. Numeric values must be >= 0. Buffer must be of length
  28  * MAX_KEY_LEN or more.
  29  */
  30 static char*
  31 _catkey(char* buffer, int32_t set_num, int32_t msg_num) {
  32     int32_t i = 0;
  33     i = T_CString_integerToString(buffer, set_num, 10);
  34     buffer[i++] = SEPARATOR;
  35     T_CString_integerToString(buffer+i, msg_num, 10);
  36     return buffer;
  37 }
  38
  39 U_CAPI u_nl_catd U_EXPORT2
  40 u_catopen(const char* name, const char* locale, UErrorCode* ec) {
  41     return (u_nl_catd) ures_open(name, locale, ec);
  42 }
  43
  44 U_CAPI void U_EXPORT2
  45 u_catclose(u_nl_catd catd) {
  46     ures_close((UResourceBundle*) catd); /* may be NULL */
  47 }
  48
  49 U_CAPI const UChar* U_EXPORT2
  50 u_catgets(u_nl_catd catd, int32_t set_num, int32_t msg_num,
  51           const UChar* s,
  52           int32_t* len, UErrorCode* ec) {
  53
  54     char key[MAX_KEY_LEN];
  55     const UChar* result;
  56
  57     if (ec == NULL || U_FAILURE(*ec)) {
  58         goto ERROR;
  59     }
  60
  61     result = ures_getStringByKey((const UResourceBundle*) catd,
  62                                  _catkey(key, set_num, msg_num),
  63                                  len, ec);
  64     if (U_FAILURE(*ec)) {
  65         goto ERROR;
  66     }
  67
  68     return result;
  69
  70  ERROR:
  71     /* In case of any failure, return s */
  72     if (len != NULL) {
  73         *len = u_strlen(s);
  74     }
  75     return s;
  76 }
  77
  78 /*eof*/