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 | man pages section 3: Basic Library Functions Oracle Solaris 11 Information Library |
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| man pages section 3: Basic Library Functions Oracle Solaris 11 Information Library |
enable_extended_FILE_stdio(3C)
posix_spawnattr_getschedparam(3C)
posix_spawnattr_getschedpolicy(3C)
posix_spawnattr_getsigdefault(3C)
posix_spawnattr_getsigignore_np(3C)
posix_spawnattr_getsigmask(3C)
posix_spawnattr_setschedparam(3C)
posix_spawnattr_setschedpolicy(3C)
posix_spawnattr_setsigdefault(3C)
posix_spawnattr_setsigignore_np(3C)
posix_spawnattr_setsigmask(3C)
posix_spawn_file_actions_addclose(3C)
posix_spawn_file_actions_addclosefrom_np(3C)
posix_spawn_file_actions_adddup2(3C)
posix_spawn_file_actions_addopen(3C)
posix_spawn_file_actions_destroy(3C)
posix_spawn_file_actions_init(3C)
pthread_attr_getdetachstate(3C)
pthread_attr_getinheritsched(3C)
pthread_attr_getschedparam(3C)
pthread_attr_getschedpolicy(3C)
pthread_attr_setdetachstate(3C)
pthread_attr_setinheritsched(3C)
pthread_attr_setschedparam(3C)
pthread_attr_setschedpolicy(3C)
pthread_barrierattr_destroy(3C)
pthread_barrierattr_getpshared(3C)
pthread_barrierattr_setpshared(3C)
pthread_condattr_getpshared(3C)
pthread_condattr_setpshared(3C)
pthread_cond_reltimedwait_np(3C)
pthread_key_create_once_np(3C)
pthread_mutexattr_getprioceiling(3C)
pthread_mutexattr_getprotocol(3C)
pthread_mutexattr_getpshared(3C)
pthread_mutexattr_getrobust(3C)
pthread_mutexattr_setprioceiling(3C)
pthread_mutexattr_setprotocol(3C)
pthread_mutexattr_setpshared(3C)
pthread_mutexattr_setrobust(3C)
pthread_mutex_getprioceiling(3C)
pthread_mutex_reltimedlock_np(3C)
pthread_mutex_setprioceiling(3C)
pthread_rwlockattr_destroy(3C)
pthread_rwlockattr_getpshared(3C)
pthread_rwlockattr_setpshared(3C)
pthread_rwlock_reltimedrdlock_np(3C)
pthread_rwlock_reltimedwrlock_np(3C)
pthread_rwlock_timedrdlock(3C)
pthread_rwlock_timedwrlock(3C)
rctlblk_get_enforced_value(3C)
- convert string to unsigned long
#include <stdlib.h>unsigned longstrtoul(const char *restrictstr,char **restrictendptr,intbase);
unsigned long longstrtoull(const char *restrictstr,char **restrictendptr,intbase);
Thestrtoul() function converts the initial portion of the string pointed tobystr to a typeunsigned long int representation. First it decomposes the inputstring into three parts: an initial, possibly empty, sequence of white-space characters (asspecified byisspace(3C)); a subject sequence interpreted as an integer represented insome radix determined by the value ofbase; and a final string ofone or more unrecognised characters, including the terminating null byte of theinput string. Then it attempts to convert the subject sequence to anunsigned integer, and returns the result.
If the value ofbase is 0, the expected form of thesubject sequence is that of a decimal constant, octal constant or hexadecimalconstant, any of which may be preceded by a + or -sign. A decimal constant begins with a non-zero digit, and consists ofa sequence of decimal digits. An octal constant consists of the prefix 0optionally followed by a sequence of the digits 0 to 7 only.A hexadecimal constant consists of the prefix 0x or 0X followed bya sequence of the decimal digits and letters a (or A) tof (or F) with values 10 to 15 respectively.
If the value ofbase is between 2 and 36, the expectedform of the subject sequence is a sequence of letters and digitsrepresenting an integer with the radix specified bybase, optionally preceded bya + or - sign. The letters from a (or A) to z(or Z) inclusive are ascribed the values 10 to 35; only letterswhose ascribed values are less than that ofbase are permitted. Ifthe value ofbase is 16, the characters 0x or 0X mayoptionally precede the sequence of letters and digits, following the sign if present.
The subject sequence is defined as the longest initial subsequence of theinput string, starting with the first non-white-space character, that is of theexpected form. The subject sequence contains no characters if the input stringis empty or consists entirely of white-space characters, or if the first non-white-spacecharacter is other than a sign or a permissible letter or digit.
If the subject sequence has the expected form and the value ofbase is 0, the sequence of characters starting with the first digitis interpreted as an integer constant. If the subject sequence has theexpected form and the value ofbase is between 2 and 36, itis used as the base for conversion, ascribing to each letter itsvalue as given above. If the subject sequence begins with a minussign, the value resulting from the conversion is negated. A pointer tothe final string is stored in the object pointed to byendptr, providedthatendptr is not a null pointer.
In other than the POSIX locale, additional implementation-dependent subject sequence forms maybe accepted.
If the subject sequence is empty or does not have the expectedform, no conversion is performed; the value ofstr is stored inthe object pointed to byendptr, provided thatendptr is not anull pointer.
Thestrtoull() function is identical tostrtoul() except that it returns thevalue represented bystr as anunsigned long long.
Upon successful completionstrtoul() returns the converted value, if any. If noconversion could be performed,0 is returned anderrno may be settoEINVAL. If the correct value is outside the range of representable values,ULONG_MAX is returned anderrno is set toERANGE.
Thestrtoul() function will fail if:
The value ofbase is not supported.
The value to be returned is not representable.
Thestrtoul() function may fail if:
No conversion could be performed.
Because 0 andULONG_MAX are returned on error and are also validreturns on success, an application wishing to check for error situations shouldseterrno to 0, then callstrtoul(), then checkerrno and ifit is non-zero, assume an error has occurred.
Unlikestrtod(3C) andstrtol(3C),strtoul() must always return a non-negative number; so,using the return value ofstrtoul() for out-of-range numbers withstrtoul() couldcause more severe problems than just loss of precision if those numberscan ever be negative.
Seeattributes(5) for descriptions of the following attributes:
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isalpha(3C),isspace(3C),scanf(3C),strtod(3C),strtol(3C),attributes(5),standards(5)
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