Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

strsuftoll(3) [netbsd man page]

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

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

Check Out this Related Man Page

HUMANIZE_NUMBER(3)					   BSD Library Functions Manual 					HUMANIZE_NUMBER(3)

dehumanize_number, humanize_number -- format a number into a human readable form and vice versa SYNOPSIS
#include <stdlib.h> int dehumanize_number(const char *str, int64_t *result); int humanize_number(char *buffer, size_t len, int64_t number, const char *suffix, int scale, int flags); DESCRIPTION
The humanize_number() function formats the signed 64 bit quantity given in number into buffer. A space and then suffix is appended to the end. buffer must be at least len bytes long. If the formatted number (including suffix) would be too long to fit into buffer, then divide number by 1024 until it will. In this case, prefix suffix with the appropriate SI designator. The prefixes are: Prefix Description Multiplier k kilo 1024 M mega 1048576 G giga 1073741824 T tera 1099511627776 P peta 1125899906842624 E exa 1152921504606846976 len must be at least 4 plus the length of suffix, in order to ensure a useful result is generated into buffer. To use a specific prefix, specify this as scale (Multiplier = 1024 ^ scale). This can not be combined with any of the scale flags below. The following flags may be passed in scale: HN_AUTOSCALE Format the buffer using the lowest multiplier possible. HN_GETSCALE Return the prefix index number (the number of times number must be divided to fit) instead of formatting it to the buf- fer. The following flags may be passed in flags: HN_DECIMAL If the final result is less than 10, display it using one digit. HN_NOSPACE Do not put a space between number and the prefix. HN_B Use 'B' (bytes) as prefix if the original result does not have a prefix. HN_DIVISOR_1000 Divide number with 1000 instead of 1024. The dehumanize_number() function parses the string representing an integral value given in str and stores the numerical value in the integer pointed to by result. The provided string may hold one of the suffixes, which will be interpreted and used to scale up its accompanying numerical value. RETURN VALUES
humanize_number() returns the number of characters stored in buffer (excluding the terminating NUL) upon success, or -1 upon failure. If HN_GETSCALE is specified, the prefix index number will be returned instead. dehumanize_number() returns 0 if the string was parsed correctly. A -1 is returned to indicate failure and an error code is stored in errno. ERRORS
dehumanize_number() will fail and no number will be stored in result if: [EINVAL] The string in str was empty or carried an unknown suffix. [ERANGE] The string in str represented a number that does not fit in result. SEE ALSO
strsuftoll(3), orders(7), humanize_number(9) HISTORY
humanize_number() first appeared in NetBSD 2.0. dehumanize_number() first appeared in NetBSD 5.0. BSD
January 14, 2011 BSD
Man Page