WebThe strtol () function converts the initial part of the string in nptr to a long integer value 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. WebThe strtol () function shall not change the setting of errno if successful. Since 0, {LONG_MIN} or {LLONG_MIN}, and {LONG_MAX} or {LLONG_MAX} are returned on error and are also valid returns on success, an application wishing to check for error situations should set errno to 0, then call strtol () or strtoll (), then check errno. RETURN VALUE
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WebMay 1, 2024 · Robust C89 strtol -based solution With: no undefined behavior (as could be had with the atoi family) a stricter definition of integer than strtol (e.g. no leading whitespace nor trailing trash chars) classification of the error case (e.g. to give useful error messages to users) a "testsuite" WebDec 5, 2012 · The man page of strtol gives the following: ERRORS EINVAL (not in C99) The given base contains an unsupported value. ERANGE The resulting value was out of range. The implementation may also set errno to EINVAL in case no conversion was performed (no digits seen, and 0 returned). The following code checks for range errors. tapered mouth shovel
man atoi (1): convert a string to an integer - Man Pages
Webstrtol () 関数は、 nptr の文字列の最初の部分を、 base を基数として long int に変換する。. この base は 2 から 36 までの値 あるいは特別な意味を持つ値 0 でなければならない … Web1. An initial, possibly empty, sequence of white-space characters (as specified by isspace ()) 2. A subject sequence interpreted as an integer represented in some radix determined by … WebThe strtoul() function converts the initial part of the string in nptrto an unsigned longvalue according to the given base, which must be between 2 and 36 inclusive, or be the special … tapered mtb fork bearing installation