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%module example
%{
extern int gcd(int x, int y);
extern int gcdmain(int argc, char *argv[]);
extern int count(char *bytes, int len, char c);
extern void capitalize (char *str, int len);
extern void circle (double cx, double cy);
extern int squareCubed (int n, int *OUTPUT);
%}
%include exception.i
%include typemaps.i
extern int gcd(int x, int y);
%typemap(in) (int argc, char *argv[]) {
int i;
if (TYPE($input) != T_ARRAY) {
SWIG_exception(SWIG_ValueError, "Expected an array");
}
$1 = RARRAY_LEN($input);
if ($1 == 0) {
SWIG_exception(SWIG_ValueError, "List must contain at least 1 element");
}
$2 = (char **) malloc(($1+1)*sizeof(char *));
for (i = 0; i < $1; i++) {
VALUE s = rb_ary_entry($input,i);
if (TYPE(s) != T_STRING) {
free($2);
SWIG_exception(SWIG_ValueError, "List items must be strings");
}
$2[i] = StringValuePtr(s);
}
$2[i] = 0;
}
%typemap(freearg) (int argc, char *argv[]) {
free($2);
}
extern int gcdmain(int argc, char *argv[]);
%typemap(in) (char *bytes, int len) {
if (TYPE($input) != T_STRING) {
SWIG_exception(SWIG_ValueError, "Expected a string");
}
$1 = StringValuePtr($input);
$2 = RSTRING_LEN($input);
}
extern int count(char *bytes, int len, char c);
/* This example shows how to wrap a function that mutates a string */
%typemap(in) (char *str, int len) {
char *temp;
if (TYPE($input) != T_STRING) {
SWIG_exception(SWIG_ValueError,"Expected a string");
}
temp = StringValuePtr($input);
$2 = RSTRING_LEN($input);
$1 = (char *) malloc($2+1);
memmove($1,temp,$2);
}
/* Return the mutated string as a new object. */
%typemap(argout, fragment="output_helper") (char *str, int len) {
VALUE o;
o = rb_str_new($1,$2);
$result = output_helper($result,o);
free($1);
}
extern void capitalize(char *str, int len);
/* A multi-valued constraint. Force two arguments to lie
inside the unit circle */
%typemap(check) (double cx, double cy) {
double a = $1*$1 + $2*$2;
if (a > 1.0) {
SWIG_exception(SWIG_ValueError,"$1_name and $2_name must be in unit circle");
}
}
extern void circle(double cx, double cy);
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