1// © 2016 and later: Unicode, Inc. and others.
2// License & terms of use: http://www.unicode.org/copyright.html
3/*
4**********************************************************************
5*   Copyright (C) 2001-2006, International Business Machines
6*   Corporation and others.  All Rights Reserved.
7**********************************************************************
8*/
9
10#include "cstring.h"
11#include "ustrfmt.h"
12
13
14/***
15 * Fills in a UChar* string with the radix-based representation of a
16 * uint32_t number padded with zeroes to minwidth.  The result
17 * will be null terminated if there is room.
18 *
19 * @param buffer UChar buffer to receive result
20 * @param capacity capacity of buffer
21 * @param i the unsigned number to be formatted
22 * @param radix the radix from 2..36
23 * @param minwidth the minimum width.  If the result is narrower than
24 *        this, '0's will be added on the left.  Must be <=
25 *        capacity.
26 * @return the length of the result, not including any terminating
27 *        null
28 */
29U_CAPI int32_t U_EXPORT2
30uprv_itou (UChar * buffer, int32_t capacity,
31           uint32_t i, uint32_t radix, int32_t minwidth)
32{
33    int32_t length = 0;
34    int digit;
35    int32_t j;
36    UChar temp;
37
38    do{
39        digit = (int)(i % radix);
40        buffer[length++]=(UChar)(digit<=9?(0x0030+digit):(0x0030+digit+7));
41        i=i/radix;
42    } while(i && length<capacity);
43
44    while (length < minwidth){
45        buffer[length++] = (UChar) 0x0030;/*zero padding */
46    }
47    /* null terminate the buffer */
48    if(length<capacity){
49        buffer[length] = (UChar) 0x0000;
50    }
51
52    /* Reverses the string */
53    for (j = 0; j < (length / 2); j++){
54        temp = buffer[(length-1) - j];
55        buffer[(length-1) - j] = buffer[j];
56        buffer[j] = temp;
57    }
58    return length;
59}
60