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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  */
29 U_CAPI int32_t U_EXPORT2
uprv_itou(UChar * buffer,int32_t capacity,uint32_t i,uint32_t radix,int32_t minwidth)30 uprv_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