conf: eliminate outmoded/odd indent method from interface xml

These format functions needed the ability to be indented by an
arbitrary amount, but were written before the introduction of
virBufferAdjustIndent(). They instead used the much more clunky method
of adding a "level" arg to every format function, and padding with
spaces using the "%*s" printf format specifier (giving it the level,
and "", which has the effect of adding level spaces to the output).

While eliminating the hardcoded indentation in other xml, I decided it
was finally time to also modernize the interface formatter code to
make it more consistent.

src/conf/interface_conf.c

 /*
  * interface_conf.c: interfaces XML handling
  *
- * Copyright (C) 2006-2010, 2013 Red Hat, Inc.
+ * Copyright (C) 2006-2010, 2013, 2014 Red Hat, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -41,8 +41,7 @@ VIR_ENUM_IMPL(virInterface,
 static virInterfaceDefPtr
 virInterfaceDefParseXML(xmlXPathContextPtr ctxt, int parentIfType);
 static int
-virInterfaceDefDevFormat(virBufferPtr buf,
-                         const virInterfaceDef *def, int level);
+virInterfaceDefDevFormat(virBufferPtr buf, const virInterfaceDef *def);
 
 static
 void virInterfaceIpDefFree(virInterfaceIpDefPtr def) {
@@ -857,13 +856,12 @@ virInterfaceDefPtr virInterfaceDefParseFile(const char *filename)
 }
 
 static int
-virInterfaceBridgeDefFormat(virBufferPtr buf,
-                            const virInterfaceDef *def, int level)
+virInterfaceBridgeDefFormat(virBufferPtr buf, const virInterfaceDef *def)
 {
     size_t i;
     int ret = 0;
 
-    virBufferAsprintf(buf, "%*s  <bridge", level*2, "");
+    virBufferAddLit(buf, "<bridge");
     if (def->data.bridge.stp == 1)
         virBufferAddLit(buf, " stp='on'");
     else if (def->data.bridge.stp == 0)
@@ -871,25 +869,25 @@ virInterfaceBridgeDefFormat(virBufferPtr buf,
     if (def->data.bridge.delay != NULL)
         virBufferAsprintf(buf, " delay='%s'", def->data.bridge.delay);
     virBufferAddLit(buf, ">\n");
+    virBufferAdjustIndent(buf, 2);
 
     for (i = 0; i < def->data.bridge.nbItf; i++) {
-        if (virInterfaceDefDevFormat(buf,
-                                     def->data.bridge.itf[i], level+2) < 0)
+        if (virInterfaceDefDevFormat(buf, def->data.bridge.itf[i]) < 0)
             ret = -1;
     }
 
-    virBufferAsprintf(buf, "%*s  </bridge>\n", level*2, "");
+    virBufferAdjustIndent(buf, -2);
+    virBufferAddLit(buf, "</bridge>\n");
     return ret;
 }
 
 static int
-virInterfaceBondDefFormat(virBufferPtr buf,
-                          const virInterfaceDef *def, int level)
+virInterfaceBondDefFormat(virBufferPtr buf, const virInterfaceDef *def)
 {
     size_t i;
     int ret = 0;
 
-    virBufferAsprintf(buf, "%*s  <bond", level*2, "");
+    virBufferAddLit(buf, "<bond");
     if (def->data.bond.mode == VIR_INTERFACE_BOND_BALRR)
         virBufferAddLit(buf, " mode='balance-rr'");
     else if (def->data.bond.mode == VIR_INTERFACE_BOND_ABACKUP)
@@ -905,10 +903,11 @@ virInterfaceBondDefFormat(virBufferPtr buf,
     else if (def->data.bond.mode == VIR_INTERFACE_BOND_BALALB)
         virBufferAddLit(buf, " mode='balance-alb'");
     virBufferAddLit(buf, ">\n");
+    virBufferAdjustIndent(buf, 2);
 
     if (def->data.bond.monit == VIR_INTERFACE_BOND_MONIT_MII) {
-        virBufferAsprintf(buf, "%*s    <miimon freq='%d'",
-                          level*2, "", def->data.bond.frequency);
+        virBufferAsprintf(buf, "<miimon freq='%d'",
+                          def->data.bond.frequency);
         if (def->data.bond.downdelay > 0)
             virBufferAsprintf(buf, " downdelay='%d'", def->data.bond.downdelay);
         if (def->data.bond.updelay > 0)
@@ -924,8 +923,7 @@ virInterfaceBondDefFormat(virBufferPtr buf,
                            "%s", _("bond arp monitoring has no target"));
             return -1;
         }
-        virBufferAsprintf(buf, "%*s    <arpmon interval='%d' target='%s'",
-                          level*2, "",
+        virBufferAsprintf(buf, "<arpmon interval='%d' target='%s'",
                           def->data.bond.interval, def->data.bond.target);
         if (def->data.bond.validate == VIR_INTERFACE_BOND_ARP_ACTIVE)
             virBufferAddLit(buf, " validate='active'");
@@ -936,17 +934,17 @@ virInterfaceBondDefFormat(virBufferPtr buf,
         virBufferAddLit(buf, "/>\n");
     }
     for (i = 0; i < def->data.bond.nbItf; i++) {
-        if (virInterfaceDefDevFormat(buf, def->data.bond.itf[i], level+2) < 0)
+        if (virInterfaceDefDevFormat(buf, def->data.bond.itf[i]) < 0)
             ret = -1;
     }
 
-    virBufferAsprintf(buf, "%*s  </bond>\n", level*2, "");
+    virBufferAdjustIndent(buf, -2);
+    virBufferAddLit(buf, "</bond>\n");
     return ret;
 }
 
 static int
-virInterfaceVlanDefFormat(virBufferPtr buf,
-                          const virInterfaceDef *def, int level)
+virInterfaceVlanDefFormat(virBufferPtr buf, const virInterfaceDef *def)
 {
     if (def->data.vlan.tag == NULL) {
         virReportError(VIR_ERR_INTERNAL_ERROR,
@@ -954,48 +952,45 @@ virInterfaceVlanDefFormat(virBufferPtr buf,
         return -1;
     }
 
-    virBufferAsprintf(buf, "%*s  <vlan tag='%s'",
-                      level*2, "", def->data.vlan.tag);
+    virBufferAsprintf(buf, "<vlan tag='%s'", def->data.vlan.tag);
     if (def->data.vlan.devname != NULL) {
         virBufferAddLit(buf, ">\n");
-        virBufferAsprintf(buf, "%*s    <interface name='%s'/>\n",
-                          level*2, "", def->data.vlan.devname);
-        virBufferAsprintf(buf, "%*s  </vlan>\n", level*2, "");
+        virBufferAdjustIndent(buf, 2);
+        virBufferAsprintf(buf, "<interface name='%s'/>\n",
+                          def->data.vlan.devname);
+        virBufferAdjustIndent(buf, -2);
+        virBufferAddLit(buf, "</vlan>\n");
     } else
         virBufferAddLit(buf, "/>\n");
     return 0;
 }
 
 static int
-virInterfaceProtocolDefFormat(virBufferPtr buf, const virInterfaceDef *def,
-                              int level)
+virInterfaceProtocolDefFormat(virBufferPtr buf, const virInterfaceDef *def)
 {
     size_t i, j;
 
     for (i = 0; i < def->nprotos; i++) {
 
-        virBufferAsprintf(buf, "%*s  <protocol family='%s'>\n",
-                          level*2, "", def->protos[i]->family);
-
-        if (def->protos[i]->autoconf) {
-            virBufferAsprintf(buf, "%*s    <autoconf/>\n", level*2, "");
-        }
+        virBufferAsprintf(buf, "<protocol family='%s'>\n",
+                          def->protos[i]->family);
+        virBufferAdjustIndent(buf, 2);
 
+        if (def->protos[i]->autoconf)
+            virBufferAddLit(buf, "<autoconf/>\n");
         if (def->protos[i]->dhcp) {
             if (def->protos[i]->peerdns == 0)
-                virBufferAsprintf(buf, "%*s    <dhcp peerdns='no'/>\n",
-                                  level*2, "");
+                virBufferAddLit(buf, "<dhcp peerdns='no'/>\n");
             else if (def->protos[i]->peerdns == 1)
-                virBufferAsprintf(buf, "%*s    <dhcp peerdns='yes'/>\n",
-                                  level*2, "");
+                virBufferAddLit(buf, "<dhcp peerdns='yes'/>\n");
             else
-                virBufferAsprintf(buf, "%*s    <dhcp/>\n", level*2, "");
+                virBufferAddLit(buf, "<dhcp/>\n");
         }
 
         for (j = 0; j < def->protos[i]->nips; j++) {
             if (def->protos[i]->ips[j]->address != NULL) {
 
-                virBufferAsprintf(buf, "%*s    <ip address='%s'", level*2, "",
+                virBufferAsprintf(buf, "<ip address='%s'",
                                   def->protos[i]->ips[j]->address);
                 if (def->protos[i]->ips[j]->prefix != 0) {
                     virBufferAsprintf(buf, " prefix='%d'",
@@ -1005,19 +1000,20 @@ virInterfaceProtocolDefFormat(virBufferPtr buf, const virInterfaceDef *def,
             }
         }
         if (def->protos[i]->gateway != NULL) {
-            virBufferAsprintf(buf, "%*s    <route gateway='%s'/>\n",
-                              level*2, "", def->protos[i]->gateway);
+            virBufferAsprintf(buf, "<route gateway='%s'/>\n",
+                              def->protos[i]->gateway);
         }
 
-        virBufferAsprintf(buf, "%*s  </protocol>\n", level*2, "");
+        virBufferAdjustIndent(buf, -2);
+        virBufferAddLit(buf, "</protocol>\n");
     }
     return 0;
 }
 
 static int
 virInterfaceStartmodeDefFormat(virBufferPtr buf,
-                               enum virInterfaceStartMode startmode,
-                               int level) {
+                               enum virInterfaceStartMode startmode)
+{
     const char *mode;
     switch (startmode) {
         case VIR_INTERFACE_START_UNSPECIFIED:
@@ -1036,13 +1032,12 @@ virInterfaceStartmodeDefFormat(virBufferPtr buf,
                            "%s", _("virInterfaceDefFormat unknown startmode"));
             return -1;
     }
-    virBufferAsprintf(buf, "%*s  <start mode='%s'/>\n", level*2, "", mode);
+    virBufferAsprintf(buf, "<start mode='%s'/>\n", mode);
     return 0;
 }
 
 static int
-virInterfaceDefDevFormat(virBufferPtr buf,
-                         const virInterfaceDef *def, int level)
+virInterfaceDefDevFormat(virBufferPtr buf, const virInterfaceDef *def)
 {
     const char *type = NULL;
 
@@ -1064,52 +1059,48 @@ virInterfaceDefDevFormat(virBufferPtr buf,
         goto cleanup;
     }
 
-    virBufferAsprintf(buf, "%*s<interface type='%s' ", level*2, "", type);
+    virBufferAsprintf(buf, "<interface type='%s' ", type);
     if (def->name != NULL)
         virBufferEscapeString(buf, "name='%s'", def->name);
     virBufferAddLit(buf, ">\n");
+    virBufferAdjustIndent(buf, 2);
 
     switch (def->type) {
         case VIR_INTERFACE_TYPE_ETHERNET:
-            virInterfaceStartmodeDefFormat(buf, def->startmode, level);
+            virInterfaceStartmodeDefFormat(buf, def->startmode);
             if (def->mac != NULL)
-                virBufferAsprintf(buf, "%*s  <mac address='%s'/>\n",
-                                  level*2, "", def->mac);
+                virBufferAsprintf(buf, "<mac address='%s'/>\n", def->mac);
             if (def->mtu != 0)
-                virBufferAsprintf(buf, "%*s  <mtu size='%d'/>\n",
-                                  level*2, "", def->mtu);
-            virInterfaceProtocolDefFormat(buf, def, level);
+                virBufferAsprintf(buf, "<mtu size='%d'/>\n", def->mtu);
+            virInterfaceProtocolDefFormat(buf, def);
             break;
         case VIR_INTERFACE_TYPE_BRIDGE:
-            virInterfaceStartmodeDefFormat(buf, def->startmode, level);
+            virInterfaceStartmodeDefFormat(buf, def->startmode);
             if (def->mtu != 0)
-                virBufferAsprintf(buf, "%*s  <mtu size='%d'/>\n",
-                                  level*2, "", def->mtu);
-            virInterfaceProtocolDefFormat(buf, def, level);
-            virInterfaceBridgeDefFormat(buf, def, level);
+                virBufferAsprintf(buf, "<mtu size='%d'/>\n", def->mtu);
+            virInterfaceProtocolDefFormat(buf, def);
+            virInterfaceBridgeDefFormat(buf, def);
             break;
         case VIR_INTERFACE_TYPE_BOND:
-            virInterfaceStartmodeDefFormat(buf, def->startmode, level);
+            virInterfaceStartmodeDefFormat(buf, def->startmode);
             if (def->mtu != 0)
-                virBufferAsprintf(buf, "%*s  <mtu size='%d'/>\n",
-                                  level*2, "", def->mtu);
-            virInterfaceProtocolDefFormat(buf, def, level);
-            virInterfaceBondDefFormat(buf, def, level);
+                virBufferAsprintf(buf, "<mtu size='%d'/>\n", def->mtu);
+            virInterfaceProtocolDefFormat(buf, def);
+            virInterfaceBondDefFormat(buf, def);
             break;
         case VIR_INTERFACE_TYPE_VLAN:
-            virInterfaceStartmodeDefFormat(buf, def->startmode, level);
+            virInterfaceStartmodeDefFormat(buf, def->startmode);
             if (def->mac != NULL)
-                virBufferAsprintf(buf, "%*s  <mac address='%s'/>\n",
-                                  level*2, "", def->mac);
+                virBufferAsprintf(buf, "<mac address='%s'/>\n", def->mac);
             if (def->mtu != 0)
-                virBufferAsprintf(buf, "%*s  <mtu size='%d'/>\n",
-                                  level*2, "", def->mtu);
-            virInterfaceProtocolDefFormat(buf, def, level);
-            virInterfaceVlanDefFormat(buf, def, level);
+                virBufferAsprintf(buf, "<mtu size='%d'/>\n", def->mtu);
+            virInterfaceProtocolDefFormat(buf, def);
+            virInterfaceVlanDefFormat(buf, def);
             break;
     }
 
-    virBufferAsprintf(buf, "%*s</interface>\n", level*2, "");
+    virBufferAdjustIndent(buf, -2);
+    virBufferAddLit(buf, "</interface>\n");
 
     if (virBufferError(buf))
         goto no_memory;
@@ -1124,7 +1115,7 @@ char *virInterfaceDefFormat(const virInterfaceDef *def)
 {
     virBuffer buf = VIR_BUFFER_INITIALIZER;
 
-    if (virInterfaceDefDevFormat(&buf, def, 0) < 0) {
+    if (virInterfaceDefDevFormat(&buf, def) < 0) {
         virBufferFreeAndReset(&buf);
         return NULL;
     }