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-
- ATOF(3) UNIX Programmer's Manual ATOF(3)
-
- NNAAMMEE
- aattooff - convert ASCII string to double
-
- SSYYNNOOPPSSIISS
- ##iinncclluuddee <<ssttddlliibb..hh>>
-
- _d_o_u_b_l_e
- aattooff(_c_o_n_s_t _c_h_a_r _*_n_p_t_r)
-
- DDEESSCCRRIIPPTTIIOONN
- The aattooff() function converts the initial portion of the string pointed to
- by _n_p_t_r to _d_o_u_b_l_e representation.
-
- It is equivalent to:
-
- strtod(nptr, (char **)NULL);
-
- SSEEEE AALLSSOO
- atoi(3), atol(3), strtod(3), strtol(3), strtoul(3)
-
- SSTTAANNDDAARRDDSS
- The aattooff() function conforms to ANSI C3.1591989 (``ANSI C'').
-
- BBUUGGSS
- This manual page represents intent instead of actual practice. While it
- is intended that aattooff() be implemented using strtod(3), this has not yet
- happened. In the current system, aattooff() translates a string in the fol
- lowing form to a double: a string of leading white space, possibly fol
- lowed by a sign (``+'' or ``''), followed by a digit string which may
- contain one decimal point (``.''), which may be followed by either of the
- exponent flags (``E'' or ``e''), and lastly, followed by a signed or un
- signed integer.
-
- BSD Experimental June 29, 1991 1
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