strsuftoll(3) [netbsd man page]

STRSUFTOLL(3)						   BSD Library Functions Manual 					     STRSUFTOLL(3)

NAME

     strsuftoll, strsuftollx -- convert a string to a long long, with suffix parsing

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <stdlib.h>

     long long
     strsuftoll(const char *desc, const char *val, long long min, long long max);

     long long
     strsuftollx(const char *desc, const char *val, long long min, long long max, char *errbuf, size_t errbuflen);

DESCRIPTION

     The functions strsuftoll() and strsuftollx() convert val into a number of type long long, checking that the result is not smaller than min or
     larger than max.  Two or more decimal numbers may be separated by an ``x'' to indicate a product.

     Each decimal number may have one of the following optional suffixes:

	   b	Block; multiply by 512
	   k	Kibi; multiply by 1024 (1 KiB)
	   m	Mebi; multiply by 1048576 (1 MiB)
	   g	Gibi; multiply by 1073741824 (1 GiB)
	   t	Tebi; multiply by 1099511627776 (1 TiB)
	   w	Word; multiply by the number of bytes in an integer

     In the case of an error (range overflow or an invalid number), strsuftollx() places an error message into errbuf (which is errbuflen bytes
     long) and returns 0, and strsuftoll() displays that error and terminates the process.  The parameter desc is used to construct errbuf.

     Neither desc nor val may be NULL.

RETURN VALUES

     The functions strsuftoll() and strsuftollx() return either the result of the conversion, unless the value overflows or is not a number; in
     the latter case, strsuftoll() displays an error message and terminates the process with exit code EXIT_FAILURE, and strsuftollx() returns
     with 0 and errbuf contains a non-empty error message.

ERRORS

     [ERANGE]		The given string was out of range; the value converted has been clamped.

SEE ALSO

     errx(3), strtoll(3), orders(7)

BUGS

     At least few limitations should be mentioned:

     o	 Both functions ignore the current locale.

     o	 Neither strsuftoll() nor strsuftollx() fail gracefully in case of invalid, NULL, pointers.

     o	 Arguably the return type should be intmax_t instead of long long.

     o	 The strsuftollx() function is prone to buffer overflows if used incorrectly.  Arguably only strsuftoll() should be exposed to a caller.

BSD
								 December 14, 2010							       BSD

STRTOL(3)						   BSD Library Functions Manual 						 STRTOL(3)

NAME

     strtoimax, strtol, strtoll, strtoq -- convert a string value to a long, long long, intmax_t or quad_t integer

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <inttypes.h>

     intmax_t
     strtoimax(const char *restrict str, char **restrict endptr, int base);

     #include <stdlib.h>

     long
     strtol(const char *restrict str, char **restrict endptr, int base);

     long long
     strtoll(const char *restrict str, char **restrict endptr, int base);

     #include <sys/types.h>
     #include <stdlib.h>
     #include <limits.h>

     quad_t
     strtoq(const char *str, char **endptr, int base);

DESCRIPTION

     The strtol() function converts the string in str to a long value.	The strtoll() function converts the string in str to a long long value.
     The strtoimax() function converts the string in str to an intmax_t value.	The strtoq() function converts the string in str to a quad_t
     value.  The conversion is done according to the given base, which must be between 2 and 36 inclusive, or be the special value 0.

     The string may 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, long long, intmax_t or quad_t value in the obvious manner, stopping at the first charac-
     ter 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' repre-
     sents 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, however,
     strtol() stores the original value of str in *endptr.  (Thus, if *str is not '' but **endptr is '' on return, the entire string was
     valid.)

     Extended locale versions of these functions are documented in strtol_l(3).  See xlocale(3) for more information.

RETURN VALUES

     The strtol(), strtoll(), strtoimax(), and strtoq() functions return the result of the conversion, unless the value would underflow or over-
     flow.  If no conversion could be performed, 0 is returned and the global variable errno is set to EINVAL (the last feature is not portable
     across all platforms).  If an overflow or underflow occurs, errno is set to ERANGE and the function return value is clamped according to the
     following table.

	   Function	  underflow	overflow
	   strtol()	  LONG_MIN	LONG_MAX
	   strtoll()	  LLONG_MIN	LLONG_MAX
	   strtoimax()	  INTMAX_MIN	INTMAX_MAX
	   strtoq()	  LLONG_MIN	LLONG_MAX

ERRORS

     [EINVAL]		The value of base is not supported or no conversion could be performed (the last feature is not portable across all plat-
			forms).

     [ERANGE]		The given string was out of range; the value converted has been clamped.

LEGACY SYNOPSIS

     #include <stdlib.h>
     #include <limits.h>

     <limits.h> is necessary for the strtol() and strtoll() functions.

SEE ALSO

     atof(3), atoi(3), atol(3), strtod(3), strtol_l(3), strtoul(3), wcstol(3), compat(5)

STANDARDS

     The strtol() function conforms to ISO/IEC 9899:1990 (``ISO C90'').  The strtoll() and strtoimax() functions conform to ISO/IEC 9899:1999
     (``ISO C99'').  The BSD strtoq() function is deprecated.

BSD
								 November 28, 2001							       BSD