// © 2016 and later: Unicode, Inc. and others.

// License & terms of use: http://www.unicode.org/copyright.html

/*

**********************************************************************

* Copyright (c) 2003, International Business Machines

* Corporation and others.  All Rights Reserved.

**********************************************************************

* Author: Alan Liu

* Created: March 19 2003

* Since: ICU 2.6

**********************************************************************

*/

#include "unicode/ucat.h"

#include "unicode/ustring.h"

#include "cstring.h"

#include "uassert.h"

/* Separator between set_num and msg_num */

static const char SEPARATOR = '%';

/* Maximum length of a set_num/msg_num key, incl. terminating zero.

 * Longest possible key is "-2147483648%-2147483648" */

#define MAX_KEY_LEN (24)

/**

 * Fill in buffer with a set_num/msg_num key string, given the numeric

 * values. Numeric values must be >= 0. Buffer must be of length

 * MAX_KEY_LEN or more.

 */

static char*

_catkey(char* buffer, int32_t set_num, int32_t msg_num) {

    int32_t i = 0;

    i = T_CString_integerToString(buffer, set_num, 10);

    buffer[i++] = SEPARATOR;

    T_CString_integerToString(buffer+i, msg_num, 10);

    return buffer;

}

U_CAPI u_nl_catd U_EXPORT2

u_catopen(const char* name, const char* locale, UErrorCode* ec) {

    return (u_nl_catd) ures_open(name, locale, ec);

}

U_CAPI void U_EXPORT2

u_catclose(u_nl_catd catd) {

    ures_close((UResourceBundle*) catd); /* may be NULL */

}

U_CAPI const UChar* U_EXPORT2

u_catgets(u_nl_catd catd, int32_t set_num, int32_t msg_num,

          const UChar* s,

          int32_t* len, UErrorCode* ec) {

    char key[MAX_KEY_LEN];

    const UChar* result;

    if (ec == NULL || U_FAILURE(*ec)) {

        goto ERROR;

    }

    result = ures_getStringByKey((const UResourceBundle*) catd,

                                 _catkey(key, set_num, msg_num),

                                 len, ec);

    if (U_FAILURE(*ec)) {

        goto ERROR;

    }

    return result;

 ERROR:

    /* In case of any failure, return s */

    if (len != NULL) {

        *len = u_strlen(s);

    }

    return s;

}

/*eof*/