ICU-59117.0.1.tar.gz

[apple/icu.git] / icuSources / common / ustrfmt.cpp

diff --git a/icuSources/common/ustrfmt.cpp b/icuSources/common/ustrfmt.cpp
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+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+**********************************************************************
+*   Copyright (C) 2001-2006, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+**********************************************************************
+*/
+
+#include "cstring.h"
+#include "ustrfmt.h"
+
+
+/***
+ * Fills in a UChar* string with the radix-based representation of a
+ * uint32_t number padded with zeroes to minwidth.  The result
+ * will be null terminated if there is room.
+ *
+ * @param buffer UChar buffer to receive result
+ * @param capacity capacity of buffer
+ * @param i the unsigned number to be formatted
+ * @param radix the radix from 2..36
+ * @param minwidth the minimum width.  If the result is narrower than
+ *        this, '0's will be added on the left.  Must be <=
+ *        capacity.
+ * @return the length of the result, not including any terminating
+ *        null
+ */
+U_CAPI int32_t U_EXPORT2
+uprv_itou (UChar * buffer, int32_t capacity,
+           uint32_t i, uint32_t radix, int32_t minwidth)
+{
+    int32_t length = 0;
+    int digit;
+    int32_t j;
+    UChar temp;
+
+    do{
+        digit = (int)(i % radix);
+        buffer[length++]=(UChar)(digit<=9?(0x0030+digit):(0x0030+digit+7));
+        i=i/radix;
+    } while(i && length<capacity);
+
+    while (length < minwidth){
+        buffer[length++] = (UChar) 0x0030;/*zero padding */
+    }
+    /* null terminate the buffer */
+    if(length<capacity){
+        buffer[length] = (UChar) 0x0000;
+    }
+
+    /* Reverses the string */
+    for (j = 0; j < (length / 2); j++){
+        temp = buffer[(length-1) - j];
+        buffer[(length-1) - j] = buffer[j];
+        buffer[j] = temp;
+    }
+    return length;
+}