[PATCH 1/2] util: add virStringParseYesNo()

[Shotaro Gotanda <g.sho1500@xxxxxxxxx>]

This function parse and convert string "yes|no" into bool true|false.

Signed-off-by: Shotaro Gotanda <g.sho1500@xxxxxxxxx>
---
 src/util/virstring.c | 32 ++++++++++++++++++++++++++++++++
 src/util/virstring.h |  3 +++
 2 files changed, 35 insertions(+)

diff --git a/src/util/virstring.c b/src/util/virstring.c
index 33f8191f45..70018459de 100644
--- a/src/util/virstring.c
+++ b/src/util/virstring.c
@@ -1548,3 +1548,35 @@ virStringParsePort(const char *str,
 
     return 0;
 }
+
+
+/**
+ * virStringParseYesNo:
+ * @str: "yes|no" to parse
+ * @port: pointer to parse and convert "yes|no" into
+ *
+ * Parses a string "yes|no" and convert it into true|false. Returns
+ * 0 on success and -1 on error.
+ */
+int virStringParseYesNo(const char *str,
+                       bool *result)
+{
+  bool r = false;
+
+  if (!str)
+    return -1;
+
+  if (STREQ(str, "yes")) {
+    r = true;
+  } else if (STREQ(str, "no")) {
+    r = false;
+  } else {
+    virReportError(VIR_ERR_INTERNAL_ERROR,
+                 _("Invalid value, '%s' must be either 'yes' or 'no'"), str);
+    return -1;
+  }
+
+  *result = r;
+
+  return 0;
+}
diff --git a/src/util/virstring.h b/src/util/virstring.h
index 1e36ac459c..b921d5407b 100644
--- a/src/util/virstring.h
+++ b/src/util/virstring.h
@@ -316,6 +316,9 @@ int virStringParsePort(const char *str,
                        unsigned int *port)
     ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
 
+int virStringParseYesNo(const char *str,
+                       bool *result);
+
 /**
  * VIR_AUTOSTRINGLIST:
  *
-- 
2.19.1

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