[RFC][PATCH 4/5] XResource extension v1.2 implementation of XResQueryClientIds

[Erkki Seppälä]

From: Erkki Seppala <erkki.seppala at vincit.fi>
Reviewed-by: Rami Ylimäki <rami.ylimaki at vincit.fi> 

This is a short test for the new request. It gives a short example how
the new request could be used.

---
 res-clientid-test.c |  140 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 140 insertions(+), 0 deletions(-)
 create mode 100644 res-clientid-test.c

diff --git a/res-clientid-test.c b/res-clientid-test.c
new file mode 100644
index 0000000..4516d6d
--- /dev/null
+++ b/res-clientid-test.c
@@ -0,0 +1,140 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <X11/Xlib.h>
+#include <X11/extensions/XRes.h>
+#include <unistd.h>
+
+int main(int argc, char **argv)
+{
+    Display *display;
+
+    if (argc != 2 || !(display = XOpenDisplay(argv[1]))) {
+        printf("Cannot open display or invalid number of arguments provided\n");
+        printf("Usage: %s :0\n", argv[0]);
+        return 1;
+    }
+
+    {
+        int                  major, minor;
+        if (!XResQueryVersion(display, &major, &minor)) {
+            printf("XResQueryVersion call failed\n");
+            return 1;
+        }
+
+        if (major != 1 || minor < 2) { 
+            printf("Invalid X-Resource extension version %d.%d, major 1 atleast minor 2 expected\n", major, minor);
+
+            return 1;
+        }
+    }
+
+    {
+        int event, error;
+
+        if (!XResQueryExtension(display, &event, &error)) {
+            printf("X-Resource extension not present\n");
+            return 1;
+        }
+    }
+
+    {
+        pid_t our_pid = getpid();
+        XID our_xid = 0;
+        long num_ids;
+        XResClientIdValue *client_ids;
+        XResClientIdSpec client_specs[3];
+        client_specs[0].client = None;
+        client_specs[0].mask = 0;
+        Status status = XResQueryClientIds(display, 1, client_specs, &num_ids, &client_ids);
+        if (status == Success) {
+            int c;
+            for (c = 0; c < num_ids; ++c) {
+                XResClientIdValue *value = client_ids + c;
+                printf("client %0x ", (int) value->spec.client);
+                switch (XResGetClientIdType(value)) {
+                case XRES_CLIENT_ID_XID: {
+                    printf("xid");
+                } break;
+                case XRES_CLIENT_ID_PID: {
+                    pid_t pid = XResGetClientPid(value);
+                    printf("pid=%d", (int) pid);
+                    if (pid == our_pid) {
+                        our_xid = value->spec.client;
+                    }
+                } break;
+                default:
+                    printf("unknown");
+                }
+                printf("\n");
+            }
+            XResClientIdsDestroy(num_ids, client_ids);
+            
+            if (!our_xid) {
+                printf("failed to find XID of this application");
+                return 1;
+            } else {
+                printf("XID of this client was found: 0x%0x\n", (int) our_xid);
+            }
+
+        } else {
+            printf("failed to query client ids\n");
+            return 1;
+        }
+
+        client_specs[0].client = our_xid;
+        client_specs[0].mask = XRES_CLIENT_ID_PID_MASK;
+        client_specs[1].client = our_xid;
+        client_specs[1].mask = XRES_CLIENT_ID_PID_MASK;
+        status = XResQueryClientIds(display, 2, client_specs, &num_ids, &client_ids);
+        if (status != Success) {
+            printf("failed to query for ourself\n");
+            return 1;
+        }
+        if (num_ids != 1) {
+            printf("failed to return exactly one result (got: %ld)\n", num_ids);
+            return 1;
+        }
+        if (client_ids[0].spec.client != our_xid) {
+            printf("failed to return our id (not exactly against the specification, though)\n");
+            return 1;
+        }
+        if (XResGetClientPid(&client_ids[0]) != our_pid) {
+            printf("failed to return our pid\n");
+            return 1;
+        }
+
+        XResClientIdsDestroy(num_ids, client_ids);
+
+        client_specs[2].client = None;
+        client_specs[1].mask = XRES_CLIENT_ID_PID_MASK;
+
+        status = XResQueryClientIds(display, 3, client_specs, &num_ids, &client_ids);
+        if (status != Success) {
+            printf("failed to query for ourself and Any\n");
+            return 1;
+        }
+
+        {
+            int numSelf = 0; // how many times are we mentioned in the list?
+            int c;
+            for (c = 0; c < num_ids; ++c) {
+                XResClientIdValue *value = client_ids + c;
+                if (value->spec.client == our_xid) {
+                    ++numSelf;
+                }
+            }
+
+            if (numSelf != 1) {
+                printf("Our xid was not exactly once in the result set, but %d times\n", numSelf);
+                return 1;
+            }
+        }
+
+        XResClientIdsDestroy(num_ids, client_ids);
+
+        printf("all tests ok\n");
+    }
+
+    XCloseDisplay(display);
+    return 0;
+}
-- 
1.7.0.4