digittoint3
Convert a numeric character to its integer value
Usage
#include <ctype.h>
int
digittoint(int c);
int
digittoint_l(int c, locale_t loc);
Library
Standard C Library (libc, -lc)
Overview
The digittoint() and digittoint_l() functions convert a numeric character to its corresponding integer value. The character can be any decimal digit or hexadecimal digit. With hexadecimal characters, the case of the values does not matter.
The digittoint_l() function takes an explicit locale argument, whereas the digittoint() function use the current global or per-thread locale.
Return values
The digittoint() and digittoint_l() functions always return an integer from the range of 0 to 15. If the given character was not a digit as defined by isxdigit(3) or isxdigit_l(3), the function will return 0.
Releases
56 releases since FreeBSD 5.0-RELEASE; the text changed 35 times.