/trunk/Examples/chicken/multimap/example.i

 1/* File : example.i */
 2%module example
 3
 4%{
 5extern int gcd(int x, int y);
 6extern int gcdmain(int argc, char *argv[]);
 7extern int count(char *bytes, int len, char c);
 8extern void capitalize (char *str, int len);
 9extern void circle (double cx, double cy);
10extern int squareCubed (int n, int *OUTPUT);
11%}
12
13%include exception.i
14%include typemaps.i
15
16extern int    gcd(int x, int y);
17
18%typemap(in) (int argc, char *argv[]) {
19  int i;
20  if (!C_swig_is_vector ($input)) {
21    swig_barf (SWIG_BARF1_BAD_ARGUMENT_TYPE, "Argument $input is not a vector");
22  }
23  $1 = C_header_size ($input);
24  $2 = (char **) malloc(($1+1)*sizeof(char *));
25  for (i = 0; i < $1; i++) {
26    C_word o = C_block_item ($input, i);
27    if (!C_swig_is_string (o)) {
28      char err[50];
29      free($2);
30      sprintf (err, "$input[%d] is not a string", i);
31      swig_barf (SWIG_BARF1_BAD_ARGUMENT_TYPE, err);
32    }
33    $2[i] = C_c_string (o);
34  }
35  $2[i] = 0;
36}
37
38%typemap(freearg) (int argc, char *argv[]) {
39  free($2);
40}
41extern int gcdmain(int argc, char *argv[]);
42
43%typemap(in) (char *bytes, int len) {
44  if (!C_swig_is_string ($input)) {
45    swig_barf (SWIG_BARF1_BAD_ARGUMENT_TYPE, "Argument $input is not a string");
46  }	
47  $1 = C_c_string ($input);
48  $2 = C_header_size ($input);
49}
50
51extern int count(char *bytes, int len, char c);
52
53
54/* This example shows how to wrap a function that mutates a string */
55
56%typemap(in) (char *str, int len) 
57%{  if (!C_swig_is_string ($input)) {
58    swig_barf (SWIG_BARF1_BAD_ARGUMENT_TYPE, "Argument $input is not a string");
59  }
60  $2 = C_header_size ($input);
61  $1 = (char *) malloc ($2+1);
62  memmove ($1, C_c_string ($input), $2);
63%}
64
65/* Return the mutated string as a new object.  Notice the if MANY construct ... they must be at column 0. */
66
67%typemap(argout) (char *str, int len) (C_word *scmstr) 
68%{  scmstr = C_alloc (C_SIZEOF_STRING ($2));
69  SWIG_APPEND_VALUE(C_string (&scmstr, $2, $1));
70  free ($1);
71%}
72
73extern void capitalize (char *str, int len);
74
75/* A multi-valued constraint.  Force two arguments to lie
76   inside the unit circle */
77
78%typemap(check) (double cx, double cy) {
79  double a = $1*$1 + $2*$2;
80  if (a > 1.0) {
81    SWIG_exception (SWIG_ValueError, "cx and cy must be in unit circle");
82  }
83}
84
85extern void circle (double cx, double cy);
86
87/* Test out multiple return values */
88
89extern int squareCubed (int n, int *OUTPUT);
90%{
91/* Returns n^3 and set n2 to n^2 */
92int squareCubed (int n, int *n2) {
93  *n2 = n * n;
94  return (*n2) * n;
95};
96%}