virsh: Set up cmdDomblkinfo() and cmdDomblkinfoPrint() for vshTable API implementation

I've moved all the printing from cmdDomblkinfoPrint() to cmdDomblkinfo(),
and renamed the cmdDomblkinfoPrint() to cmdDomblkinfoGet(), since nature of
that function changed from gathering and printing informations only to
gathering information. This I believe simplifies the functions and
makes the implementation of vshTable API simpler.
Signed-off-by: NSimon Kobyda <skobyda@redhat.com>

tools/virsh-domain-monitor.c

@@ -406,33 +406,23 @@ static const vshCmdOptDef opts_domblkinfo[] = {
     {.name = NULL}
 };
 
-static void
-cmdDomblkinfoPrint(vshControl *ctl,
+static bool
+cmdDomblkinfoGet(vshControl *ctl,
                    const virDomainBlockInfo *info,
-                   const char *device,
-                   bool human, bool title)
+                   char **cap,
+                   char **alloc,
+                   char **phy,
+                   bool human)
 {
-    char *cap = NULL;
-    char *alloc = NULL;
-    char *phy = NULL;
-
-    if (title) {
-        vshPrintExtra(ctl, "%-10s %-15s %-15s %-15s\n", _("Target"),
-                      _("Capacity"), _("Allocation"), _("Physical"));
-        vshPrintExtra(ctl, "-----------------------------"
-                      "------------------------\n");
-        return;
-    }
-
     if (info->capacity == 0 && info->allocation == 0 && info->physical == 0) {
-        cap = vshStrdup(ctl, "-");
-        alloc = vshStrdup(ctl, "-");
-        phy = vshStrdup(ctl, "-");
+        *cap = vshStrdup(ctl, "-");
+        *alloc = vshStrdup(ctl, "-");
+        *phy = vshStrdup(ctl, "-");
     } else if (!human) {
-        if (virAsprintf(&cap, "%llu", info->capacity) < 0 ||
-            virAsprintf(&alloc, "%llu", info->allocation) < 0 ||
-            virAsprintf(&phy, "%llu", info->physical) < 0)
-            goto cleanup;
+        if (virAsprintf(cap, "%llu", info->capacity) < 0 ||
+            virAsprintf(alloc, "%llu", info->allocation) < 0 ||
+            virAsprintf(phy, "%llu", info->physical) < 0)
+            return false;
     } else {
         double val_cap, val_alloc, val_phy;
         const char *unit_cap, *unit_alloc, *unit_phy;
@@ -441,24 +431,13 @@ cmdDomblkinfoPrint(vshControl *ctl,
         val_alloc = vshPrettyCapacity(info->allocation, &unit_alloc);
         val_phy = vshPrettyCapacity(info->physical, &unit_phy);
 
-        if (virAsprintf(&cap, "%.3lf %s", val_cap, unit_cap) < 0 ||
-            virAsprintf(&alloc, "%.3lf %s", val_alloc, unit_alloc) < 0 ||
-            virAsprintf(&phy, "%.3lf %s", val_phy, unit_phy) < 0)
-            goto cleanup;
-    }
-
-    if (device) {
-        vshPrint(ctl, "%-10s %-15s %-15s %-15s\n", device, cap, alloc, phy);
-    } else {
-        vshPrint(ctl, "%-15s %s\n", _("Capacity:"), cap);
-        vshPrint(ctl, "%-15s %s\n", _("Allocation:"), alloc);
-        vshPrint(ctl, "%-15s %s\n", _("Physical:"), phy);
+        if (virAsprintf(cap, "%.3lf %s", val_cap, unit_cap) < 0 ||
+            virAsprintf(alloc, "%.3lf %s", val_alloc, unit_alloc) < 0 ||
+            virAsprintf(phy, "%.3lf %s", val_phy, unit_phy) < 0)
+            return false;
     }
 
- cleanup:
-    VIR_FREE(cap);
-    VIR_FREE(alloc);
-    VIR_FREE(phy);
+    return true;
 }
 
 
@@ -478,6 +457,9 @@ cmdDomblkinfo(vshControl *ctl, const vshCmd *cmd)
     xmlNodePtr *disks = NULL;
     char *target = NULL;
     char *protocol = NULL;
+    char *cap = NULL;
+    char *alloc = NULL;
+    char *phy = NULL;
 
     if (!(dom = virshCommandOptDomain(ctl, cmd, NULL)))
         return false;
@@ -502,7 +484,10 @@ cmdDomblkinfo(vshControl *ctl, const vshCmd *cmd)
             goto cleanup;
 
         /* print the title */
-        cmdDomblkinfoPrint(ctl, NULL, NULL, false, true);
+        vshPrintExtra(ctl, "%-10s %-15s %-15s %-15s\n", _("Target"),
+                      _("Capacity"), _("Allocation"), _("Physical"));
+        vshPrintExtra(ctl, "-----------------------------"
+                      "------------------------\n");
 
         for (i = 0; i < ndisks; i++) {
             ctxt->node = disks[i];
@@ -525,7 +510,9 @@ cmdDomblkinfo(vshControl *ctl, const vshCmd *cmd)
                 }
             }
 
-            cmdDomblkinfoPrint(ctl, &info, target, human, false);
+            if (!cmdDomblkinfoGet(ctl, &info, &cap, &alloc, &phy, human))
+                goto cleanup;
+            vshPrint(ctl, "%-10s %-15s %-15s %-15s\n", target, cap, alloc, phy);
 
             VIR_FREE(target);
             VIR_FREE(protocol);
@@ -534,12 +521,19 @@ cmdDomblkinfo(vshControl *ctl, const vshCmd *cmd)
         if (virDomainGetBlockInfo(dom, device, &info, 0) < 0)
             goto cleanup;
 
-        cmdDomblkinfoPrint(ctl, &info, NULL, human, false);
+        if (!cmdDomblkinfoGet(ctl, &info, &cap, &alloc, &phy, human))
+            goto cleanup;
+        vshPrint(ctl, "%-15s %s\n", _("Capacity:"), cap);
+        vshPrint(ctl, "%-15s %s\n", _("Allocation:"), alloc);
+        vshPrint(ctl, "%-15s %s\n", _("Physical:"), phy);
     }
 
     ret = true;
 
  cleanup:
+    VIR_FREE(cap);
+    VIR_FREE(alloc);
+    VIR_FREE(phy);
     virshDomainFree(dom);
     VIR_FREE(target);
     VIR_FREE(protocol);