nserver: Add call_function.

* nserver/src/ncmd.c (call_function): New function definition. Initial
version.
* nserver/src/ncmd.h (call_function): New function declaration.
* nserver/tests/ncmd_tests.c (test_call_function): Test for
call_function.
(all_tests): Add test_call_function.

1 files changed, 102 insertions, 0 deletions

diff --git a/nserver/src/ncmd.c b/nserver/src/ncmd.c
index 0b86d32..a4fb992 100644
--- a/nserver/src/ncmd.c
+++ b/nserver/src/ncmd.c
@@ -168,3 +168,105 @@ int check_args(struct bstrList *cmd_parts, int argc)
     return -1;
 }
 
+/**
+ * TODO:
+ * - msg needs to be dynamically allocated.
+ * - error msgs need to be consistent.
+ */
+char *call_function(int func, struct bstrList *cmd_parts)
+{
+    char *msg = NULL;
+    if (func < 0 || cmd_parts == NULL || cmd_parts->qty < 1) {
+        msg = "function call failed: internal error";
+
+        return msg;
+    }
+
+    int rc = 0;
+    switch (func) {
+    case NS_CREATE:
+        if(check_args(cmd_parts, 2) != 0) {
+            msg = "create failed: command invalid\n";
+            break;
+        }
+        if (sscreate(bdata(cmd_parts->entry[1])) != 0) {
+            msg = "create failed: internal error";
+            break;
+        }
+        msg = "OK\n";
+
+        break;
+    case NS_SAMPLE:
+        if(check_args(cmd_parts, 3) != 0) {
+            msg = "sample failed: command invalid\n";
+            break;
+        }
+
+        double sample = strtod(bdata(cmd_parts->entry[2]), NULL);
+        if (sssample(bdata(cmd_parts->entry[1]), sample) != 0) {
+            msg = "sample failed: internal error";
+            break;
+        }
+        msg = "OK\n";
+
+        break;
+    case NS_MEAN:
+        if(check_args(cmd_parts, 2) != 0) {
+            msg = "mean failed: command invalid\n";
+            break;
+        }
+
+        double mean = ssmean(bdata(cmd_parts->entry[1]));
+        if (mean < 0) {
+            msg = "mean failed: internal error";
+            break;
+        }
+        msg = (char *) calloc(20, sizeof(char));
+        if (sprintf(msg, "Mean: %.2f\n", mean) < 0) {
+            msg = "mean failed: internal error";
+        }
+        break;
+    case NS_DUMP:
+        if(check_args(cmd_parts, 2) != 0) {
+            msg = "dump failed: command invalid\n";
+            break;
+        }
+
+        char *dump = ssdump(bdata(cmd_parts->entry[1]));
+        if (dump == NULL) {
+            msg = "dump failed: internal error";
+            break;
+        }
+        msg = dump;
+        break;
+    case NS_DELETE:
+        if(check_args(cmd_parts, 2) != 0) {
+            msg = "delete failed: command invalid\n";
+            break;
+        }
+
+        if (ssdelete(bdata(cmd_parts->entry[1])) != 0) {
+            msg = "delete failed: internal error";
+            break;
+        }
+        msg = "OK\n";
+
+        break;
+    case NS_LIST:
+        if(check_args(cmd_parts, 1) != 0) {
+            msg = "list failed: command invalid\n";
+            break;
+        }
+
+        msg = sslist();
+        if (msg == NULL) {
+            msg = "list failed: internal error";
+        }
+        break;
+    default:
+        msg = "error: function not found";
+        break;
+    }
+
+    return msg;
+}