Mercurial > pub > dyncall > bindings

annotate java/jdc/examples/UnixLibCExample.java @ 60:8e905c0798c7

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
- p2Z() helper func - import fix for test code avoiding potential circular import
author Tassilo Philipp
date Wed, 03 Aug 2022 15:38:07 +0200
parents 4ee8d6aa7721
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
22
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
1 import org.dyncall.DC;
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
2
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
3 // This example tries to make use of each call in the binding.
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
4 class UnixLibCExample
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
5 {
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
6 public static void main(String args[])
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
7 {
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
8 long lib = DC.loadLibrary("/usr/lib/libc.so");
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
9 System.out.format("libc.so handle: %x\n", lib);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
10
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
11 long f0 = DC.find(lib, "strlen");
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
12 System.out.format("found strlen at: %x\n", f0);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
13
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
14 long f1 = DC.find(lib, "strstr");
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
15 System.out.format("found strstr at: %x\n", f1);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
16
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
17 long f2 = DC.find(lib, "strncmp");
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
18 System.out.format("found strncmp at: %x\n", f2);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
19
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
20 long vm = DC.newCallVM(4096);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
21 DC.reset(vm);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
22 System.out.format("dcGetError() = %d\n", DC.getError(vm));
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
23 DC.mode(vm, 1234567); // bogus mode, should set error
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
24 System.out.format("dcGetError() = %d (after trying to set bogus mode)\n", DC.getError(vm));
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
25 DC.mode(vm, DC.C_DEFAULT); // good mode, should clear error
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
26 System.out.format("dcGetError() = %d (after setting valid mode)\n", DC.getError(vm));
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
27
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
28 // String param.
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
29 DC.argString(vm, "This is a Java string of 33 chars");
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
30 int r0 = DC.callInt(vm, f0);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
31 System.out.format("strlen(\"This is a Java string of 33 chars\") = %d\n", r0);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
32
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
33 // String param and string/pointer return.
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
34 DC.reset(vm);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
35 DC.argString(vm, "This is a Java string");
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
36 DC.argString(vm, "Java");
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
37 String r1 = DC.callString(vm, f1); // will return a copy of the output string, not like a pointer in C
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
38 System.out.format("strlen(\"This is a Java string\", \"Java\") = %s\n", r1);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
39 long r1l = DC.callPointer(vm, f1); // test returning the pointer as long
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
40 System.out.format("strlen(\"This is a Java string\", \"Java\") = 0x%x (returned pointer, pointless here, but serves as example)\n", r1l);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
41
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
42 DC.reset(vm);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
43 DC.argString(vm, "This is a Java string");
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
44 DC.argString(vm, "This is");
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
45 DC.argInt(vm, 6);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
46 int r2 = DC.callInt(vm, f2);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
47 System.out.format("strlen(\"This is a Java string\", \"This is\", 6) = %d\n", r2);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
48 DC.reset(vm);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
49 DC.argString(vm, "This is a Java string");
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
50 DC.argString(vm, "This is");
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
51 DC.argInt(vm, 8);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
52 r2 = DC.callInt(vm, f2);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
53 System.out.format("strlen(\"This is a Java string\", \"This is\", 8) = %d\n", r2);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
54
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
55 //DC.reset(vm);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
56 //DC.argDouble(vm, 2.);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
57 //DC.argDouble(vm, 10.);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
58 //double r1 = DC.callDouble(vm, f1);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
59 //System.out.format("pow(2., 10.) = %f\n", r1);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
60
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
61 // Done, cleanup.
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
62 DC.freeCallVM(vm);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
63 DC.freeLibrary(lib);
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
64 }
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
65 }
4ee8d6aa7721 - java binding cleanup, exposed free functions (not very oo, this entire binding)
cslag
parents:
diff changeset
66