1 files changed, 99 insertions, 0 deletions
diff --git a/perl-install/Newt/Av_CharPtrPtr.c b/perl-install/Newt/Av_CharPtrPtr.c
new file mode 100644
index 000000000..d108ef5d0
--- /dev/null
+++ b/perl-install/Newt/Av_CharPtrPtr.c
@@ -0,0 +1,99 @@
+#ifdef __cplusplus
+extern "C" {
+#endif
+#include "EXTERN.h"
+#include "perl.h"
+#include "XSUB.h"
+#include "Av_CharPtrPtr.h"  /* XS_*_charPtrPtr() */
+#ifdef __cplusplus
+}
+#endif
+
+
+/* Used by the INPUT typemap for char**.
+ * Will convert a Perl AV* (containing strings) to a C char**.
+ */
+char **
+XS_unpack_charPtrPtr( rv )
+SV *rv;
+{
+	AV *av;
+	SV **ssv;
+	char **s;
+	int avlen;
+	int x;
+
+	if( SvROK( rv ) && (SvTYPE(SvRV(rv)) == SVt_PVAV) )
+		av = (AV*)SvRV(rv);
+	else {
+		warn("XS_unpack_charPtrPtr: rv was not an AV ref");
+		return( (char**)NULL );
+	}
+
+	/* is it empty? */
+	avlen = av_len(av);
+	if( avlen < 0 ){
+		warn("XS_unpack_charPtrPtr: array was empty");
+		return( (char**)NULL );
+	}
+
+	/* av_len+2 == number of strings, plus 1 for an end-of-array sentinel.
+	 */
+	s = (char **)safemalloc( sizeof(char*) * (avlen + 2) );
+	if( s == NULL ){
+		warn("XS_unpack_charPtrPtr: unable to malloc char**");
+		return( (char**)NULL );
+	}
+	for( x = 0; x <= avlen; ++x ){
+		ssv = av_fetch( av, x, 0 );
+		if( ssv != NULL ){
+			if( SvPOK( *ssv ) ){
+				s[x] = (char *)safemalloc( SvCUR(*ssv) + 1 );
+				if( s[x] == NULL )
+					warn("XS_unpack_charPtrPtr: unable to malloc char*");
+				else
+					strcpy( s[x], SvPV( *ssv, na ) );
+			}
+			else
+				warn("XS_unpack_charPtrPtr: array elem %d was not a string.", x );
+		}
+		else
+			s[x] = (char*)NULL;
+	}
+	s[x] = (char*)NULL; /* sentinel */
+	return( s );
+}
+
+/* Used by the OUTPUT typemap for char**.
+ * Will convert a C char** to a Perl AV*.
+ */
+void
+XS_pack_charPtrPtr( st, s )
+SV *st;
+char **s;
+{
+	AV *av = newAV();
+	SV *sv;
+	char **c;
+
+	for( c = s; *c != NULL; ++c ){
+		sv = newSVpv( *c, 0 );
+		av_push( av, sv );
+	}
+	sv = newSVrv( st, NULL );	/* upgrade stack SV to an RV */
+	SvREFCNT_dec( sv );	/* discard */
+	SvRV( st ) = (SV*)av;	/* make stack RV point at our AV */
+}
+
+
+/* cleanup the temporary char** from XS_unpack_charPtrPtr */
+void
+XS_release_charPtrPtr(s)
+char **s;
+{
+	char **c;
+	for( c = s; *c != NULL; ++c )
+		safefree( *c );
+	safefree( s );
+}
+