static int num2straux (char *buff, int sz, lua_Number x) { /* if 'inf' or 'NaN', format it like '%g' */ if (x != x || x == (lua_Number)HUGE_VAL || x == -(lua_Number)HUGE_VAL) return l_sprintf(buff, sz, LUA_NUMBER_FMT, (LUAI_UACNUMBER)x); else if (x == 0) { /* can be -0... */ /* create "0" or "-0" followed by exponent */ return l_sprintf(buff, sz, LUA_NUMBER_FMT "x0p+0", (LUAI_UACNUMBER)x); } else { int e; lua_Number m = l_mathop(frexp)(x, &e); /* 'x' fraction and exponent */ int n = 0; /* character count */ if (m < 0) { /* is number negative? */ buff[n++] = '-'; /* add sign */ m = -m; /* make it positive */ } buff[n++] = '0'; buff[n++] = 'x'; /* add "0x" */ m = adddigit(buff, n++, m * (1 << L_NBFD)); /* add first digit */ e -= L_NBFD; /* this digit goes before the radix point */ if (m > 0) { /* more digits? */ buff[n++] = lua_getlocaledecpoint(); /* add radix point */ do { /* add as many digits as needed */ m = adddigit(buff, n++, m * 16); } while (m > 0); } n += l_sprintf(buff + n, sz - n, "p%+d", e); /* add exponent */ lua_assert(n < sz); return n; } }
static int num2straux (char *buff, lua_Number x) { if (x != x || x == HUGE_VAL || x == -HUGE_VAL) /* inf or NaN? */ return sprintf(buff, LUA_NUMBER_FMT, x); /* equal to '%g' */ else if (x == 0) { /* can be -0... */ sprintf(buff, LUA_NUMBER_FMT, x); strcat(buff, "x0p+0"); /* reuses '0/-0' from 'sprintf'... */ return (int)strlen(buff); /* Custom change: fixed 64-bit compilation warning */ } else { int e; lua_Number m = l_mathop(frexp)(x, &e); /* 'x' fraction and exponent */ int n = 0; /* character count */ if (m < 0) { /* is number negative? */ buff[n++] = '-'; /* add signal */ m = -m; /* make it positive */ } buff[n++] = '0'; buff[n++] = 'x'; /* add "0x" */ m = adddigit(buff, n++, m * (1 << L_NBFD)); /* add first digit */ e -= L_NBFD; /* this digit goes before the radix point */ if (m > 0) { /* more digits? */ buff[n++] = lua_getlocaledecpoint(); /* add radix point */ do { /* add as many digits as needed */ m = adddigit(buff, n++, m * 16); } while (m > 0); } n += sprintf(buff + n, "p%+d", e); /* add exponent */ return n; } }