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STRTOL
!!!STRTOL
NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
CONFORMING TO
SEE ALSO
BUGS
----
!!NAME


strtol - convert a string to a long integer.
!!SYNOPSIS


__#include
__''nptr''__, char **__''endptr''__, int__ ''base''__);
__
!!DESCRIPTION


The __strtol()__ function converts the string in
''nptr'' to a long integer value according to the given
''base'', which must be between 2 and 36 inclusive, or be
the special value 0.


The string must begin with an arbitrary amount of white
space (as determined by isspace(3)) followed by a
single optional `+' or `-' sign. If ''base'' is zero or
16, the string may then include a `0x' prefix, and the
number will be read in base 16; otherwise, a zero
''base'' is taken as 10 (decimal) unless the next
character is `0', in which case it is taken as 8
(octal).


The remainder of the string is converted to a long int value
in the obvious manner, stopping at the first character which
is not a valid digit in the given base. (In bases above 10,
the letter `A' in either upper or lower case represents 10,
`B' represents 11, and so forth, with `Z' representing
35.)


If ''endptr'' is not NULL, __strtol()__ stores the
address of the first invalid character in ''*endptr''. If
there were no digits at all, __strtol()__ stores the
original value of ''nptr'' in ''*endptr'' (and returns
0). In particular, if ''*nptr'' is not `0' but
''**endptr'' is `0' on return, the entire string is
valid.
!!RETURN VALUE


The __strtol()__ function returns the result of the
conversion, unless the value would underflow or overflow. If
an underflow occurs, __strtol()__ returns LONG_MIN. If an
overflow occurs, __strtol()__ returns LONG_MAX. In both
cases, ''errno'' is set to ERANGE.
!!ERRORS


__ERANGE__


The given string was out of range; the value converted has
been clamped.
!!CONFORMING TO


SVID 3, BSD 4.3, ISO 9899
!!SEE ALSO


atof(3), atoi(3), atol(3),
strtod(3), strtoul(3)
!!BUGS


Ignores the current locale.
----

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Last edited on Tuesday, June 4, 2002 12:24:37 am by "perry"

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