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xt_romantoi(3) Library Functions Manual xt_romantoi(3) NAME xt_romantoi() - Convert Roman numeral string to int LIBRARY #include <xtend/stdlib.h> -lxtend SYNOPSIS int xt_romantoi(const char *string, char **endptr) ARGUMENTS string: Pointer to the first character of the Roman numeral endptr: Address of a pointer variable to receive the end of the string DESCRIPTION The xt_romantoi() function converts a string containing a valid Roman nu- meral to an integer, much like strtol(). It rejects non-normalized values, such as IIIII, XXXXX, or CCCCC, which should be written as V, L, and D, re- spectively. IIII, XXXX, and CCCC are accepted in place of IV, XL, and CD. Any number of consecutive Ms (1000s) are accepted, since there is no larger digit. Like strtol(), it returns the address of the first character not converted as part of the number. This can be used to verify that the num- ber ended as it should have, perhaps with a '0' byte. RETURN VALUES The integer value of the Roman numeral if converted, or 0 if an invalid nu- meral is detected. EXAMPLES char string[] = "XIV", *end; int n; n = xt_romantoi(string, &end); if ( *end == '0' ) printf("%dn", n); else fprintf(stderr, "Error converting %s.n", string); SEE ALSO strtol(3) xt_romantoi(3)
NAME | LIBRARY | SYNOPSIS | ARGUMENTS | DESCRIPTION | RETURN VALUES | EXAMPLES | SEE ALSO
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