/* * Copyright (C) 2000 Manuel Novoa III * * Note: buf is a pointer to the END of the buffer passed. * Call like this: * char buf[SIZE], *p; * p = __lltostr(buf + sizeof(buf) - 1, ...) * For long longs of 64 bits, appropriate buffer sizes are: * base = 2 66 = 1 (possible -) sign + 64 digits + 1 nul * base = 10 21 = 1 (possible -) sign + 19 digits + 1 nul * base = 16 18 = 1 (possible -) sign + 16 hex digits + 1 nul */ extern char *__ulltostr(char *buf, unsigned long long uval, int base, int uppercase); char *__lltostr(char *buf, long long val, int base, int uppercase) { unsigned long long uval; char *pos; int negative; negative = 0; if (val < 0) { negative = 1; uval = ((unsigned long long)(-(1+val))) + 1; } else { uval = val; } pos = __ulltostr(buf, uval, base, uppercase); if (pos && negative) { *--pos = '-'; } return pos; }