Initialize x and set it to 0/1. Each variable should normally only be
initialized once, or at least cleared out (using the function
between each initialization.
Initialize a NULL-terminated list of
mpq_t variables, and set their
values to 0/1.
Free the space occupied by x. Make sure to call this function for all
mpq_t variables when you are done with them.
Free the space occupied by a NULL-terminated list of
Assign rop from op.
Set the value of rop to op1/op2. Note that if op1 and
op2 have common factors, rop has to be passed to
mpq_canonicalize before any operations are performed on rop.
Set rop from a null-terminated string str in the given base.
The string can be an integer like “41” or a fraction like “41/152”. The
fraction must be in canonical form (see Rational Number Functions), or if
mpq_canonicalize must be called.
The numerator and optional denominator are parsed the same as in
mpz_set_str (see Assigning Integers). White space is allowed in
the string, and is simply ignored. The base can vary from 2 to 62, or
if base is 0 then the leading characters are used:
0X for hex,
0B for binary,
0 for octal, or decimal otherwise. Note that this is done separately
for the numerator and denominator, so for instance
0xEF/100 is 239/100,
0xEF/0x100 is 239/256.
The return value is 0 if the entire string is a valid number, or -1 if not.
Swap the values rop1 and rop2 efficiently.