qerror: Clean up QERR_ macros to expand into a single string

These macros expand into error class enumeration constant, comma,
string.  Unclean.  Has been that way since commit 13f59ae.

The error class is always ERROR_CLASS_GENERIC_ERROR since the previous
commit.

Clean up as follows:

* Prepend every use of a QERR_ macro by ERROR_CLASS_GENERIC_ERROR, and
  delete it from the QERR_ macro.  No change after preprocessing.

* Rewrite error_set(ERROR_CLASS_GENERIC_ERROR, ...) into
  error_setg(...).  Again, no change after preprocessing.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
diff --git a/qapi/opts-visitor.c b/qapi/opts-visitor.c
index f2ad6d7..7ae33b3 100644
--- a/qapi/opts-visitor.c
+++ b/qapi/opts-visitor.c
@@ -173,7 +173,7 @@
         const QemuOpt *first;
 
         first = g_queue_peek_head(any);
-        error_set(errp, QERR_INVALID_PARAMETER, first->name);
+        error_setg(errp, QERR_INVALID_PARAMETER, first->name);
     }
     g_hash_table_destroy(ov->unprocessed_opts);
     ov->unprocessed_opts = NULL;
@@ -193,7 +193,7 @@
 
     list = g_hash_table_lookup(ov->unprocessed_opts, name);
     if (!list) {
-        error_set(errp, QERR_MISSING_PARAMETER, name);
+        error_setg(errp, QERR_MISSING_PARAMETER, name);
     }
     return list;
 }
@@ -341,8 +341,8 @@
             strcmp(opt->str, "n") == 0) {
             *obj = false;
         } else {
-            error_set(errp, QERR_INVALID_PARAMETER_VALUE, opt->name,
-                "on|yes|y|off|no|n");
+            error_setg(errp, QERR_INVALID_PARAMETER_VALUE, opt->name,
+                       "on|yes|y|off|no|n");
             return;
         }
     } else {
@@ -403,9 +403,9 @@
             }
         }
     }
-    error_set(errp, QERR_INVALID_PARAMETER_VALUE, opt->name,
-              (ov->list_mode == LM_NONE) ? "an int64 value" :
-                                           "an int64 value or range");
+    error_setg(errp, QERR_INVALID_PARAMETER_VALUE, opt->name,
+               (ov->list_mode == LM_NONE) ? "an int64 value" :
+                                            "an int64 value or range");
 }
 
 
@@ -455,9 +455,9 @@
             }
         }
     }
-    error_set(errp, QERR_INVALID_PARAMETER_VALUE, opt->name,
-              (ov->list_mode == LM_NONE) ? "a uint64 value" :
-                                           "a uint64 value or range");
+    error_setg(errp, QERR_INVALID_PARAMETER_VALUE, opt->name,
+               (ov->list_mode == LM_NONE) ? "a uint64 value" :
+                                            "a uint64 value or range");
 }
 
 
@@ -477,8 +477,8 @@
     val = strtosz_suffix(opt->str ? opt->str : "", &endptr,
                          STRTOSZ_DEFSUFFIX_B);
     if (val < 0 || *endptr) {
-        error_set(errp, QERR_INVALID_PARAMETER_VALUE, opt->name,
-                  "a size value representible as a non-negative int64");
+        error_setg(errp, QERR_INVALID_PARAMETER_VALUE, opt->name,
+                   "a size value representible as a non-negative int64");
         return;
     }
 
diff --git a/qapi/qapi-visit-core.c b/qapi/qapi-visit-core.c
index a18ba16..5a7c900 100644
--- a/qapi/qapi-visit-core.c
+++ b/qapi/qapi-visit-core.c
@@ -110,8 +110,8 @@
         value = *obj;
         v->type_int(v, &value, name, errp);
         if (value < 0 || value > UINT8_MAX) {
-            error_set(errp, QERR_INVALID_PARAMETER_VALUE, name ? name : "null",
-                      "uint8_t");
+            error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
+                       name ? name : "null", "uint8_t");
             return;
         }
         *obj = value;
@@ -128,8 +128,8 @@
         value = *obj;
         v->type_int(v, &value, name, errp);
         if (value < 0 || value > UINT16_MAX) {
-            error_set(errp, QERR_INVALID_PARAMETER_VALUE, name ? name : "null",
-                      "uint16_t");
+            error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
+                       name ? name : "null", "uint16_t");
             return;
         }
         *obj = value;
@@ -146,8 +146,8 @@
         value = *obj;
         v->type_int(v, &value, name, errp);
         if (value < 0 || value > UINT32_MAX) {
-            error_set(errp, QERR_INVALID_PARAMETER_VALUE, name ? name : "null",
-                      "uint32_t");
+            error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
+                       name ? name : "null", "uint32_t");
             return;
         }
         *obj = value;
@@ -177,8 +177,8 @@
         value = *obj;
         v->type_int(v, &value, name, errp);
         if (value < INT8_MIN || value > INT8_MAX) {
-            error_set(errp, QERR_INVALID_PARAMETER_VALUE, name ? name : "null",
-                      "int8_t");
+            error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
+                       name ? name : "null", "int8_t");
             return;
         }
         *obj = value;
@@ -195,8 +195,8 @@
         value = *obj;
         v->type_int(v, &value, name, errp);
         if (value < INT16_MIN || value > INT16_MAX) {
-            error_set(errp, QERR_INVALID_PARAMETER_VALUE, name ? name : "null",
-                      "int16_t");
+            error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
+                       name ? name : "null", "int16_t");
             return;
         }
         *obj = value;
@@ -213,8 +213,8 @@
         value = *obj;
         v->type_int(v, &value, name, errp);
         if (value < INT32_MIN || value > INT32_MAX) {
-            error_set(errp, QERR_INVALID_PARAMETER_VALUE, name ? name : "null",
-                      "int32_t");
+            error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
+                       name ? name : "null", "int32_t");
             return;
         }
         *obj = value;
@@ -271,7 +271,7 @@
     assert(strings);
     while (strings[i++] != NULL);
     if (value < 0 || value >= i - 1) {
-        error_set(errp, QERR_INVALID_PARAMETER, name ? name : "null");
+        error_setg(errp, QERR_INVALID_PARAMETER, name ? name : "null");
         return;
     }
 
@@ -303,7 +303,7 @@
     }
 
     if (strings[value] == NULL) {
-        error_set(errp, QERR_INVALID_PARAMETER, enum_str);
+        error_setg(errp, QERR_INVALID_PARAMETER, enum_str);
         g_free(enum_str);
         return;
     }
diff --git a/qapi/qmp-dispatch.c b/qapi/qmp-dispatch.c
index 2227420..7bcc860 100644
--- a/qapi/qmp-dispatch.c
+++ b/qapi/qmp-dispatch.c
@@ -27,8 +27,8 @@
     QDict *dict = NULL;
 
     if (qobject_type(request) != QTYPE_QDICT) {
-        error_set(errp, QERR_QMP_BAD_INPUT_OBJECT,
-                  "request is not a dictionary");
+        error_setg(errp, QERR_QMP_BAD_INPUT_OBJECT,
+                   "request is not a dictionary");
         return NULL;
     }
 
@@ -41,19 +41,19 @@
 
         if (!strcmp(arg_name, "execute")) {
             if (qobject_type(arg_obj) != QTYPE_QSTRING) {
-                error_set(errp, QERR_QMP_BAD_INPUT_OBJECT_MEMBER, "execute",
-                          "string");
+                error_setg(errp, QERR_QMP_BAD_INPUT_OBJECT_MEMBER, "execute",
+                           "string");
                 return NULL;
             }
             has_exec_key = true;
         } else if (strcmp(arg_name, "arguments")) {
-            error_set(errp, QERR_QMP_EXTRA_MEMBER, arg_name);
+            error_setg(errp, QERR_QMP_EXTRA_MEMBER, arg_name);
             return NULL;
         }
     }
 
     if (!has_exec_key) {
-        error_set(errp, QERR_QMP_BAD_INPUT_OBJECT, "execute");
+        error_setg(errp, QERR_QMP_BAD_INPUT_OBJECT, "execute");
         return NULL;
     }
 
diff --git a/qapi/qmp-input-visitor.c b/qapi/qmp-input-visitor.c
index f6dab1a..e97b8a4 100644
--- a/qapi/qmp-input-visitor.c
+++ b/qapi/qmp-input-visitor.c
@@ -105,7 +105,7 @@
             if (g_hash_table_size(top_ht)) {
                 const char *key;
                 g_hash_table_find(top_ht, always_true, &key);
-                error_set(errp, QERR_QMP_EXTRA_MEMBER, key);
+                error_setg(errp, QERR_QMP_EXTRA_MEMBER, key);
             }
             g_hash_table_unref(top_ht);
         }
@@ -122,8 +122,8 @@
     Error *err = NULL;
 
     if (!qobj || qobject_type(qobj) != QTYPE_QDICT) {
-        error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-                  "QDict");
+        error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+                   "QDict");
         return;
     }
 
@@ -163,8 +163,8 @@
     QObject *qobj = qmp_input_get_object(qiv, name, true);
 
     if (!qobj || qobject_type(qobj) != QTYPE_QLIST) {
-        error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-                  "list");
+        error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+                   "list");
         return;
     }
 
@@ -215,7 +215,7 @@
     QObject *qobj = qmp_input_get_object(qiv, name, false);
 
     if (!qobj) {
-        error_set(errp, QERR_MISSING_PARAMETER, name ? name : "null");
+        error_setg(errp, QERR_MISSING_PARAMETER, name ? name : "null");
         return;
     }
     *kind = qobjects[qobject_type(qobj)];
@@ -228,8 +228,8 @@
     QObject *qobj = qmp_input_get_object(qiv, name, true);
 
     if (!qobj || qobject_type(qobj) != QTYPE_QINT) {
-        error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-                  "integer");
+        error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+                   "integer");
         return;
     }
 
@@ -243,8 +243,8 @@
     QObject *qobj = qmp_input_get_object(qiv, name, true);
 
     if (!qobj || qobject_type(qobj) != QTYPE_QBOOL) {
-        error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-                  "boolean");
+        error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+                   "boolean");
         return;
     }
 
@@ -258,8 +258,8 @@
     QObject *qobj = qmp_input_get_object(qiv, name, true);
 
     if (!qobj || qobject_type(qobj) != QTYPE_QSTRING) {
-        error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-                  "string");
+        error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+                   "string");
         return;
     }
 
@@ -274,8 +274,8 @@
 
     if (!qobj || (qobject_type(qobj) != QTYPE_QFLOAT &&
         qobject_type(qobj) != QTYPE_QINT)) {
-        error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-                  "number");
+        error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+                   "number");
         return;
     }
 
diff --git a/qapi/string-input-visitor.c b/qapi/string-input-visitor.c
index d8a8db0..bbd6a54 100644
--- a/qapi/string-input-visitor.c
+++ b/qapi/string-input-visitor.c
@@ -185,8 +185,8 @@
     StringInputVisitor *siv = DO_UPCAST(StringInputVisitor, visitor, v);
 
     if (!siv->string) {
-        error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-                  "integer");
+        error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+                   "integer");
         return;
     }
 
@@ -217,8 +217,8 @@
     return;
 
 error:
-    error_set(errp, QERR_INVALID_PARAMETER_VALUE, name,
-              "an int64 value or range");
+    error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name,
+               "an int64 value or range");
 }
 
 static void parse_type_size(Visitor *v, uint64_t *obj, const char *name,
@@ -231,8 +231,8 @@
     if (siv->string) {
         parse_option_size(name, siv->string, &val, &err);
     } else {
-        error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-                  "size");
+        error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+                   "size");
         return;
     }
     if (err) {
@@ -263,8 +263,8 @@
         }
     }
 
-    error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-              "boolean");
+    error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+               "boolean");
 }
 
 static void parse_type_str(Visitor *v, char **obj, const char *name,
@@ -274,8 +274,8 @@
     if (siv->string) {
         *obj = g_strdup(siv->string);
     } else {
-        error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-                  "string");
+        error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+                   "string");
     }
 }
 
@@ -291,8 +291,8 @@
         val = strtod(siv->string, &endp);
     }
     if (!siv->string || errno || endp == siv->string || *endp) {
-        error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-                  "number");
+        error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+                   "number");
         return;
     }