diff options
| author | Lorry Tar Creator <lorry-tar-importer@baserock.org> | 2009-08-18 20:56:02 +0000 |
|---|---|---|
| committer | Lorry <lorry@roadtrain.codethink.co.uk> | 2012-09-25 16:59:08 +0000 |
| commit | 9f8a09ed743cedd9547bf0661d518647966ab114 (patch) | |
| tree | 9c7803d3b27a8ec22e91792ac7f7932efa128b20 /Examples/java/native | |
| download | swig-tarball-master.tar.gz | |
Imported from /srv/lorry/lorry-area/swig-tarball/swig-1.3.40.tar.gz.HEADswig-1.3.40master
Diffstat (limited to 'Examples/java/native')
| -rw-r--r-- | Examples/java/native/Makefile | 18 | ||||
| -rw-r--r-- | Examples/java/native/example.i | 56 | ||||
| -rw-r--r-- | Examples/java/native/index.html | 33 | ||||
| -rw-r--r-- | Examples/java/native/runme.java | 19 |
4 files changed, 126 insertions, 0 deletions
diff --git a/Examples/java/native/Makefile b/Examples/java/native/Makefile new file mode 100644 index 0000000..92afbd4 --- /dev/null +++ b/Examples/java/native/Makefile @@ -0,0 +1,18 @@ +TOP = ../.. +SWIG = $(TOP)/../preinst-swig +SRCS = +TARGET = example +INTERFACE = example.i +SWIGOPT = + +all:: java + +java:: + $(MAKE) -f $(TOP)/Makefile SRCS='$(SRCS)' SWIG='$(SWIG)' \ + SWIGOPT='$(SWIGOPT)' TARGET='$(TARGET)' INTERFACE='$(INTERFACE)' java + javac *.java + +clean:: + $(MAKE) -f $(TOP)/Makefile java_clean + +check: all diff --git a/Examples/java/native/example.i b/Examples/java/native/example.i new file mode 100644 index 0000000..851b6fd --- /dev/null +++ b/Examples/java/native/example.i @@ -0,0 +1,56 @@ +/* File : example.i */ +%module example + +%{ +#include <string.h> + +typedef struct point { + int x; + int y; +} Point; + + +Point *point_create(int x, int y) { + Point *p = (Point *) malloc(sizeof(Point)); + p->x = x; + p->y = y; + + return p; +} + +static char *point_toString(char *format, Point *p) { + static char buf[80]; + + sprintf(buf, format, p->x, p->y); + + return buf; +} + +/* this function will be wrapped by SWIG */ +char *point_toString1(Point *p) { + return point_toString("(%d,%d)", p); +} + +/* this one we wrapped manually*/ +JNIEXPORT jstring JNICALL Java_exampleJNI_point_1toString2(JNIEnv *jenv, jclass jcls, jlong jpoint) { + Point * p; + jstring result; + + (void)jcls; + + p = *(Point **)&jpoint; + + result = (*jenv)->NewStringUTF(jenv, point_toString("[%d,%d]", p)); + + return result; +} +%} + + +Point *point_create(int x, int y); +char *point_toString1(Point *p); + +/* give access to free() for memory cleanup of the malloc'd Point */ +extern void free(void *memblock); + +%native(point_toString2) char *point_toString2(Point *p); diff --git a/Examples/java/native/index.html b/Examples/java/native/index.html new file mode 100644 index 0000000..1ca51c1 --- /dev/null +++ b/Examples/java/native/index.html @@ -0,0 +1,33 @@ +<html> +<head> +<title>SWIG:Examples:java:native</title> +</head> + +<body bgcolor="#ffffff"> + + +<tt>SWIG/Examples/java/native/</tt> +<hr> + +<H2>SWIG wrapped and manually wrapped functions in Java</H2> + +Click <a href="../../../Doc/Manual/Java.html#using_own_jni_functions">here</a> for the relevant section in the SWIG and Java documentation. +<p> +This example compares wrapping a c global function using the manual way and the SWIG way. +</p> + +<ul> +<li><a href="example.i">example.i</a>. Interface file comparing code wrapped by SWIG and wrapped manually. +<li><a href="runme.java">runme.java</a>. Sample Java program showing calls to both manually wrapped and SWIG wrapped c functions. +</ul> + +<h2>Notes</h2> + +<ul> +<li>SWIG writes all the awkward JNI code for you. You just have to tell SWIG which functions to wrap. +<li>If memory is allocated in c it needs to be free'd. A function, such as free(), can be provided with access from Java to free the memory. +</ul> + +<hr> +</body> +</html> diff --git a/Examples/java/native/runme.java b/Examples/java/native/runme.java new file mode 100644 index 0000000..e9a18b2 --- /dev/null +++ b/Examples/java/native/runme.java @@ -0,0 +1,19 @@ + +public class runme { + + static { + try { + System.loadLibrary("example"); + } catch (UnsatisfiedLinkError e) { + System.err.println("Native code library failed to load. See the chapter on Dynamic Linking Problems in the SWIG Java documentation for help.\n" + e); + System.exit(1); + } + } + + public static void main(String argv[]) { + SWIGTYPE_p_Point p = example.point_create(1, 2); + System.out.println("auto wrapped : " + example.point_toString1(p)); + System.out.println("manual wrapped: " + example.point_toString2(p)); + example.free(new SWIGTYPE_p_void(SWIGTYPE_p_Point.getCPtr(p), false)); //clean up c allocated memory + } +} |