09-30-2009
The C99 standard (ISO/IEC 9899:1999) only requires the range -127 (SCHAR_MIN) to
+127 (SCHAR_MAX) for objects of type signed char. However -128 is valid for 8-bit
signed chars if 2s complement representation is used (which it almost always is).
Note also that there are actually three char types (See C99, 6.2.5.14 and 6.2.5.15)
The three types char, signed char, and unsigned char are collectively called
the character types. The implementation shall define char to have the same range,
representation, and behavior as either signed char or unsigned char.
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LEARN ABOUT MOJAVE
atoll_l
ATOL(3) BSD Library Functions Manual ATOL(3)
NAME
atol, atoll, atol_l, atoll_l -- convert ASCII string to long or long long integer
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <stdlib.h>
long
atol(const char *str);
long long
atoll(const char *str);
#include <xlocale.h>
long
atol_l(const char *str, locale_t loc);
long long
atoll_l(const char *str, locale_t loc);
DESCRIPTION
The atol() function converts the initial portion of the string pointed to by str to long integer representation.
It is equivalent to:
strtol(str, (char **)NULL, 10);
The atoll() function converts the initial portion of the string pointed to by str to long long integer representation.
It is equivalent to:
strtoll(str, (char **)NULL, 10);
While the atol() and atoll() functions use the current locale, the atol_l() and atoll_l() functions may be passed locales directly. See
xlocale(3) for more information.
IMPLEMENTATION NOTES
The atol(), atoll(), atol_l(), and atoll_l() functions are thread-safe and async-cancel-safe.
The FreeBSD implementations of the atol() and atoll() functions are thin wrappers around strtol() and stroll() respectively, so these func-
tions will affect the value of errno in the same way that the strtol() and stroll() functions are able to. This behavior of atol() and
atoll() is not required by ISO/IEC 9899:1990 (``ISO C90'') or ISO/IEC 9899:1999 (``ISO C99''), but it is allowed by all of ISO/IEC 9899:1990
(``ISO C90''), ISO/IEC 9899:1999 (``ISO C99'') and IEEE Std 1003.1-2001 (``POSIX.1'').
ERRORS
The functions atol() and atoll() may affect the value of errno on an error.
SEE ALSO
atof(3), atoi(3), strtod(3), strtol(3), strtoul(3), xlocale(3)
STANDARDS
The atol() function conforms to ISO/IEC 9899:1990 (``ISO C90''). The atoll() function conforms to ISO/IEC 9899:1999 (``ISO C99'').
BSD
February 1, 2009 BSD