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devtools/swigwin-1.3.34/Lib/guile/ports.i

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+/* -----------------------------------------------------------------------------
+ * See the LICENSE file for information on copyright, usage and redistribution
+ * of SWIG, and the README file for authors - http://www.swig.org/release.html.
+ *
+ * ports.i
+ *
+ * Guile typemaps for handling ports
+ * ----------------------------------------------------------------------------- */
+
+%{
+  #ifndef _POSIX_SOURCE
+  /* This is needed on Solaris for fdopen(). */
+  #  define _POSIX_SOURCE 199506L
+  #endif
+  #include <stdio.h>
+  #include <errno.h>
+  #include <unistd.h>
+%}
+
+/* This typemap for FILE * accepts
+   (1) FILE * pointer objects,
+   (2) Scheme file ports.  In this case, it creates a temporary C stream
+       which reads or writes from a dup'ed file descriptor.
+ */
+
+%typemap(in, doc="$NAME is a file port or a FILE * pointer") FILE *
+  ( int closep )
+{
+  if (SWIG_ConvertPtr($input, (void**) &($1), $1_descriptor, 0) == 0) {
+    closep = 0;
+  }
+  else if(!(SCM_FPORTP($input)))
+    scm_wrong_type_arg("$name", $argnum, $input);
+  else {
+    int fd;
+    if (SCM_OUTPUT_PORT_P($input))
+      scm_force_output($input);
+    fd=dup(SCM_FPORT_FDES($input));
+    if(fd==-1) 
+      scm_misc_error("$name", strerror(errno), SCM_EOL);
+    $1=fdopen(fd,
+		   SCM_OUTPUT_PORT_P($input)
+		   ? (SCM_INPUT_PORT_P($input)
+		      ? "r+" : "w")
+		   : "r");
+    if($1==NULL)
+      scm_misc_error("$name", strerror(errno), SCM_EOL);
+    closep = 1;
+  }
+}
+
+%typemap(freearg) FILE*  {
+  if (closep$argnum)
+    fclose($1);
+}
+