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ATOF(3)               DragonFly Library Functions Manual               ATOF(3)


NAME

     atof, atof_l -- convert ASCII string to double


LIBRARY

     Standard C Library (libc, -lc)


SYNOPSIS

     #include <stdlib.h>

     double
     atof(const char *nptr);

     #include <xlocale.h>

     double
     atof_l(const char *nptr, locale_t loc);


DESCRIPTION

     The atof() function converts the initial portion of the string pointed to
     by nptr to double representation.

     It is equivalent to:

           strtod(nptr, NULL);

     The decimal point character is defined in the program's locale (category
     LC_NUMERIC).

     The _l-suffixed version takes an explicit locale argument, whereas the
     non-suffixed version use the current global or per-thread locale.


IMPLEMENTATION NOTES

     The atof() function is not thread-safe and also not async-cancel-safe.

     The atof() function has been deprecated by strtod() and should not be
     used in new code.


ERRORS

     The function atof() need not affect the value of errno on an error.


SEE ALSO

     atoi(3), atol(3), strtod(3), strtol(3), strtoul(3), xlocale(3)


STANDARDS

     The atof() function conforms to ISO/IEC 9945-1:1990 (``POSIX.1''),
     ISO/IEC 9899:1990 (``ISO C90''), and ISO/IEC 9899:1999 (``ISO C99'').

DragonFly 3.7                  November 17, 2013                 DragonFly 3.7

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