[PATCH] qapi: make all parsing visitors parse boolean options the same

[Paolo Bonzini <pbonzini@redhat.com>]

OptsVisitor, StringInputVisitor and the keyval visitor have
three different ideas of how a human could write the value of
a boolean option.  Pay homage to the backwards-compatibility
gods and make the new common helper accept all four sets: on/off,
true/false, y/n and yes/no.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 include/qapi/util.h          |  2 ++
 qapi/opts-visitor.c          | 13 +------------
 qapi/qapi-util.c             | 23 +++++++++++++++++++++++
 qapi/qobject-input-visitor.c | 11 +----------
 qapi/string-input-visitor.c  | 17 +----------------
 5 files changed, 28 insertions(+), 38 deletions(-)

diff --git a/include/qapi/util.h b/include/qapi/util.h
index bc312e90aa..6178e98e97 100644
--- a/include/qapi/util.h
+++ b/include/qapi/util.h
@@ -19,6 +19,8 @@ typedef struct QEnumLookup {
 const char *qapi_enum_lookup(const QEnumLookup *lookup, int val);
 int qapi_enum_parse(const QEnumLookup *lookup, const char *buf,
                     int def, Error **errp);
+bool qapi_bool_parse(const char *name, const char *value, bool *obj,
+                     Error **errp);
 
 int parse_qapi_name(const char *name, bool complete);
 
diff --git a/qapi/opts-visitor.c b/qapi/opts-visitor.c
index 7781c23a42..9b3a735e6d 100644
--- a/qapi/opts-visitor.c
+++ b/qapi/opts-visitor.c
@@ -379,19 +379,8 @@ opts_type_bool(Visitor *v, const char *name, bool *obj, Error **errp)
     if (!opt) {
         return false;
     }
-
     if (opt->str) {
-        if (strcmp(opt->str, "on") == 0 ||
-            strcmp(opt->str, "yes") == 0 ||
-            strcmp(opt->str, "y") == 0) {
-            *obj = true;
-        } else if (strcmp(opt->str, "off") == 0 ||
-            strcmp(opt->str, "no") == 0 ||
-            strcmp(opt->str, "n") == 0) {
-            *obj = false;
-        } else {
-            error_setg(errp, QERR_INVALID_PARAMETER_VALUE, opt->name,
-                       "on|yes|y|off|no|n");
+        if (!qapi_bool_parse(name, opt->str, obj, errp)) {
             return false;
         }
     } else {
diff --git a/qapi/qapi-util.c b/qapi/qapi-util.c
index 29a6c98b53..8a98813e42 100644
--- a/qapi/qapi-util.c
+++ b/qapi/qapi-util.c
@@ -13,6 +13,7 @@
 #include "qemu/osdep.h"
 #include "qapi/error.h"
 #include "qemu/ctype.h"
+#include "qapi/qmp/qerror.h"
 
 const char *qapi_enum_lookup(const QEnumLookup *lookup, int val)
 {
@@ -40,6 +41,28 @@ int qapi_enum_parse(const QEnumLookup *lookup, const char *buf,
     return def;
 }
 
+bool qapi_bool_parse(const char *name, const char *value, bool *obj, Error **errp)
+{
+    if (!strcasecmp(value, "on") ||
+        !strcasecmp(value, "yes") ||
+        !strcasecmp(value, "true") ||
+        !strcasecmp(value, "y")) {
+        *obj = true;
+        return true;
+    }
+    if (!strcasecmp(value, "off") ||
+        !strcasecmp(value, "no") ||
+        !strcasecmp(value, "false") ||
+        !strcasecmp(value, "n")) {
+        *obj = false;
+        return true;
+    }
+
+    error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name ? name : "null",
+               "boolean (on/off, yes/no, true/false, y/n)");
+    return false;
+}
+
 /*
  * Parse a valid QAPI name from @str.
  * A valid name consists of letters, digits, hyphen and underscore.
diff --git a/qapi/qobject-input-visitor.c b/qapi/qobject-input-visitor.c
index 7b184b50a7..183472e5e4 100644
--- a/qapi/qobject-input-visitor.c
+++ b/qapi/qobject-input-visitor.c
@@ -512,16 +512,7 @@ static bool qobject_input_type_bool_keyval(Visitor *v, const char *name,
         return false;
     }
 
-    if (!strcmp(str, "on")) {
-        *obj = true;
-    } else if (!strcmp(str, "off")) {
-        *obj = false;
-    } else {
-        error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
-                   full_name(qiv, name), "'on' or 'off'");
-        return false;
-    }
-    return true;
+    return qapi_bool_parse(name, str, obj, errp);
 }
 
 static bool qobject_input_type_str(Visitor *v, const char *name, char **obj,
diff --git a/qapi/string-input-visitor.c b/qapi/string-input-visitor.c
index 6e53396ea3..ba2697d70f 100644
--- a/qapi/string-input-visitor.c
+++ b/qapi/string-input-visitor.c
@@ -332,22 +332,7 @@ static bool parse_type_bool(Visitor *v, const char *name, bool *obj,
     StringInputVisitor *siv = to_siv(v);
 
     assert(siv->lm == LM_NONE);
-    if (!strcasecmp(siv->string, "on") ||
-        !strcasecmp(siv->string, "yes") ||
-        !strcasecmp(siv->string, "true")) {
-        *obj = true;
-        return true;
-    }
-    if (!strcasecmp(siv->string, "off") ||
-        !strcasecmp(siv->string, "no") ||
-        !strcasecmp(siv->string, "false")) {
-        *obj = false;
-        return true;
-    }
-
-    error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-               "boolean");
-    return false;
+    return qapi_bool_parse(name, siv->string, obj, errp);
 }
 
 static bool parse_type_str(Visitor *v, const char *name, char **obj,
-- 
2.26.2