/*
* Takes a int64_t and fills in a char* string with that number "radix"-based.
* Writes at most 21: chars ("-9223372036854775807" plus NUL).
* Returns the length of the string, not including the terminating NULL.
*/
U_CAPI int32_t U_EXPORT2
T_CString_int64ToString(char* buffer, int64_t v, uint32_t radix)
{
char tbuf[30];
int32_t tbx = sizeof(tbuf);
uint8_t digit;
int32_t length = 0;
uint64_t uval;
U_ASSERT(radix>=2 && radix<=16);
uval = (uint64_t) v;
if(v<0 && radix == 10) {
/* Only in base 10 do we conside numbers to be signed. */
uval = (uint64_t)(-v);
buffer[length++] = '-';
}
tbx = sizeof(tbuf)-1;
tbuf[tbx] = 0; /* We are generating the digits backwards. Null term the end. */
do {
digit = (uint8_t)(uval % radix);
tbuf[--tbx] = (char)(T_CString_itosOffset(digit));
uval = uval / radix;
} while (uval != 0);
/* copy converted number into user buffer */
uprv_strcpy(buffer+length, tbuf+tbx);
length += sizeof(tbuf) - tbx -1;
return length;
}
static
void uprv_appendByteToHexString(char *dst, uint8_t val) {
uint32_t len = (uint32_t)uprv_strlen(dst);
*(dst+len) = T_CString_itosOffset((val >> 4));
*(dst+len+1) = T_CString_itosOffset((val & 0xF));
*(dst+len+2) = 0;
}
