ustrfmt.cpp (1815B)
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 char16_t* 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 char16_t 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 30 uprv_itou (char16_t * 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 char16_t temp; 37 38 do{ 39 digit = (int)(i % radix); 40 buffer[length++]=(char16_t)(digit<=9?(0x0030+digit):(0x0030+digit+7)); 41 i=i/radix; 42 } while(i && length<capacity); 43 44 while (length < minwidth){ 45 buffer[length++] = (char16_t) 0x0030;/*zero padding */ 46 } 47 /* null terminate the buffer */ 48 if(length<capacity){ 49 buffer[length] = (char16_t) 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 }