Merge branch 'collectd-5.7'

[collectd.git] / src / daemon / meta_data.c

diff --git a/src/daemon/meta_data.c b/src/daemon/meta_data.c
index 18c4e22..19d17bf 100644 (file)
--- a/src/daemon/meta_data.c
+++ b/src/daemon/meta_data.c
@@ -26,9 +26,12 @@
 
 #include "collectd.h"
 
+#include "common.h"
 #include "meta_data.h"
 #include "plugin.h"
 
+#define MD_MAX_NONSTRING_CHARS 128
+
 /*
  * Data types
  */
@@ -684,4 +687,64 @@ int meta_data_get_boolean(meta_data_t *md, /* {{{ */
   return (0);
 } /* }}} int meta_data_get_boolean */
 
+int meta_data_as_string(meta_data_t *md, /* {{{ */
+                        const char *key, char **value) {
+  meta_entry_t *e;
+  const char *actual;
+  char buffer[MD_MAX_NONSTRING_CHARS]; /* For non-string types. */
+  char *temp;
+  int type;
+
+  if ((md == NULL) || (key == NULL) || (value == NULL))
+    return (-EINVAL);
+
+  pthread_mutex_lock(&md->lock);
+
+  e = md_entry_lookup(md, key);
+  if (e == NULL) {
+    pthread_mutex_unlock(&md->lock);
+    return (-ENOENT);
+  }
+
+  type = e->type;
+
+  switch (type) {
+  case MD_TYPE_STRING:
+    actual = e->value.mv_string;
+    break;
+  case MD_TYPE_SIGNED_INT:
+    ssnprintf(buffer, sizeof(buffer), "%" PRIi64, e->value.mv_signed_int);
+    actual = buffer;
+    break;
+  case MD_TYPE_UNSIGNED_INT:
+    ssnprintf(buffer, sizeof(buffer), "%" PRIu64, e->value.mv_unsigned_int);
+    actual = buffer;
+    break;
+  case MD_TYPE_DOUBLE:
+    ssnprintf(buffer, sizeof(buffer), GAUGE_FORMAT, e->value.mv_double);
+    actual = buffer;
+    break;
+  case MD_TYPE_BOOLEAN:
+    actual = e->value.mv_boolean ? "true" : "false";
+    break;
+  default:
+    pthread_mutex_unlock(&md->lock);
+    ERROR("meta_data_as_string: unknown type %d for key `%s'", type, key);
+    return (-ENOENT);
+  }
+
+  pthread_mutex_unlock(&md->lock);
+
+  temp = md_strdup(actual);
+  if (temp == NULL) {
+    pthread_mutex_unlock(&md->lock);
+    ERROR("meta_data_as_string: md_strdup failed for key `%s'.", key);
+    return (-ENOMEM);
+  }
+
+  *value = temp;
+
+  return (0);
+} /* }}} int meta_data_as_string */
+
 /* vim: set sw=2 sts=2 et fdm=marker : */