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@TETYYS

TETYYS/itoa

Created May 15, 2015
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What would you like to do?
no more library bullshit, real large integer comes in, legit string comes out (copied from somewhere)
char* IntegerToString(uint64_t value, char* result, int base) {
// check that the base if valid
if (base < 2 || base > 36) { *result = '\0'; return result; }
char* ptr = result, *ptr1 = result, tmp_char;
int tmp_value;
do {
tmp_value = value;
value /= base;
*ptr++ = "zyxwvutsrqponmlkjihgfedcba9876543210123456789abcdefghijklmnopqrstuvwxyz"[35 + (tmp_value - value * base)];
} while (value);
// Apply negative sign
if (tmp_value < 0) *ptr++ = '-';
*ptr-- = '\0';
while (ptr1 < ptr) {
tmp_char = *ptr;
*ptr-- = *ptr1;
*ptr1++ = tmp_char;
}
return result;
}
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