Are These All The Integer Types In C Post: 303003872

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Top Forums Programming Are These All The Integer Types In C Post 303003872 by Don Cragun on Friday 22nd of September 2017 02:36:44 AM

09-22-2017

Registered User

Hi Corona688,
The signed, unsigned, and "unadorned" long long int types (i.e., signed long long int, unsigned long long int, and long long int) weren't available in K&R C nor in the first version of the ISO C Standard, but have been ISO C standard types since the 2nd version of the standard (AKA C99).

C99 also added the header <inttypes.h> which requires for a (possibly larger than long long) intmax_t. It also requires the types intN_t and uintN_t where N is 8, 16, 32, and 64 to hold signed and unsigned, respectively, integers of exactly 8, 16, 32, and 64 bits, respectively. It requires that intmax_t be a signed integer type of at least 64 bits and that uintmax_t be an unsigned integer type of at least 64 bits. And, it allows additional N values for any other lengths of integer types supported by your compiler.

I don't know of many compilers that support other lengths, but I have seem plans to develop a compiler that would at least support int96_t, uint96_t, int128_t, and uint128_t on 64-bit architecture hardware.

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LEARN ABOUT NETBSD

wcstoll

WCSTOL(3)						   BSD Library Functions Manual 						 WCSTOL(3)

NAME

     wcstol, wcstoul, wcstoll, wcstoull, wcstoimax, wcstoumax -- convert a wide-character string value to a long, unsigned long, long long,
     unsigned long long, intmax_t or uintmax_t integer

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <wchar.h>

     long
     wcstol(const wchar_t * restrict nptr, wchar_t ** restrict endptr, int base);

     unsigned long
     wcstoul(const wchar_t * restrict nptr, wchar_t ** restrict endptr, int base);

     long long
     wcstoll(const wchar_t * restrict nptr, wchar_t ** restrict endptr, int base);

     unsigned long long
     wcstoull(const wchar_t * restrict nptr, wchar_t ** restrict endptr, int base);

     #include <inttypes.h>

     intmax_t
     wcstoimax(const wchar_t * restrict nptr, wchar_t ** restrict endptr, int base);

     uintmax_t
     wcstoumax(const wchar_t * restrict nptr, wchar_t ** restrict endptr, int base);

DESCRIPTION

     The wcstol(), wcstoul(), wcstoll(), wcstoull(), wcstoimax() and wcstoumax() functions are wide-character versions of the strtol(), strtoul(),
     strtoll(), strtoull(), strtoimax() and strtoumax() functions, respectively.  Refer to their manual pages (for example strtol(3)) for details.

SEE ALSO

     strtol(3), strtoul(3)

STANDARDS

     The wcstol(), wcstoul(), wcstoll(), wcstoull(), wcstoimax() and wcstoumax() functions conform to ISO/IEC 9899:1999 (``ISO C99'').

BSD
								 September 7, 2002							       BSD