libxl: autogenerate to_string and from_string functions for Enumerations.

The generated strings are the lower case enum value names, with underscores.
Accepted string for parsing are the same but are case insensitive.

We provide a table of strings->value for each Enumeration as well as a
convenience function to perform a lookup.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/tools/libxl/libxl_utils.c b/tools/libxl/libxl_utils.c
index b23cf2550b..889d02cb7a 100644
--- a/tools/libxl/libxl_utils.c
+++ b/tools/libxl/libxl_utils.c
@@ -639,3 +639,17 @@ int libxl_get_max_cpus(libxl_ctx *ctx)
 {
     return xc_get_max_cpus(ctx->xch);
 }
+
+int libxl__enum_from_string(const libxl_enum_string_table *t,
+                            const char *s, int *e)
+{
+    if (!t) return ERROR_INVAL;
+
+    for( ; t->s; t++) {
+        if (!strcasecmp(t->s, s)) {
+                *e = t->v;
+                return 0;
+        }
+    }
+    return ERROR_FAIL;
+}