On Thu, 2011-06-02 at 18:55 +0100, Ian Jackson wrote:
> +/* Sets ->format from the string. IDL should provide something for this. */
(please imagine a thunderclap and cloud of smoke here...)
only compile tested.
I'm not sure if we need to be more flexible, e.g. allow output in both
upper and lower case, accept - where the name has _ etc.
8<------------------------------------------------------------
# HG changeset patch
# User Ian Campbell <ian.campbell@xxxxxxxxxx>
# Date 1307095416 -3600
# Node ID fcae8a56112893ac53ff04623af61793a204e555
# Parent bd110eb1481a650db3406bf2da80c76b1bfd7e7d
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
Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
diff -r bd110eb1481a -r fcae8a561128 tools/libxl/gentypes.py
--- a/tools/libxl/gentypes.py Fri Jun 03 10:22:22 2011 +0100
+++ b/tools/libxl/gentypes.py Fri Jun 03 11:03:36 2011 +0100
@@ -113,6 +113,40 @@ def libxl_C_type_destroy(ty, v, indent =
s = indent + s
return s.replace("\n", "\n%s" % indent).rstrip(indent)
+def libxl_C_enum_to_string(ty, e, indent = " "):
+ s = ""
+ s += "switch(%s) {\n" % e
+ for v in ty.values:
+ s += " case %s:\n" % (v.name)
+ s += " return \"%s\";\n" % (v.valuename.lower())
+ s += " default:\n "
+ s += " return NULL;\n"
+ s += "}\n"
+
+ if s != "":
+ s = indent + s
+ return s.replace("\n", "\n%s" % indent).rstrip(indent)
+
+def libxl_C_enum_from_string(ty, str, e, indent = " "):
+ s = ""
+ s += "static struct { const char *s; %s v; } lookup[] = {\n" % ty.typename
+ for v in ty.values:
+ s += " { \"%s\", %s },\n" % (v.valuename.lower(), v.name)
+ s += "};\n"
+ s += "int i;\n"
+ s += "\n"
+ s += "for (i=0; i<(sizeof(lookup)/sizeof(lookup[0])); i++) {\n"
+ s += " if (!strcasecmp(lookup[i].s, %s)) {\n" % (str)
+ s += " %s = lookup[i].v;\n" % (e)
+ s += " return 0;\n"
+ s += " }\n"
+ s += "}\n"
+ s += "return -1;\n"
+
+ if s != "":
+ s = indent + s
+ return s.replace("\n", "\n%s" % indent).rstrip(indent)
+
if __name__ == '__main__':
if len(sys.argv) < 4:
print >>sys.stderr, "Usage: gentypes.py <idl> <header>
<implementation>"
@@ -142,6 +176,9 @@ if __name__ == '__main__':
f.write(libxl_C_type_define(ty) + ";\n")
if ty.destructor_fn is not None:
f.write("void %s(%s *p);\n" % (ty.destructor_fn, ty.typename))
+ if isinstance(ty, libxltypes.Enumeration):
+ f.write("const char *%s_to_string(%s e);\n" % (ty.typename,
ty.typename))
+ f.write("int %s_from_string(const char *s, %s *e);\n" %
(ty.typename, ty.typename))
f.write("\n")
f.write("""#endif /* __LIBXL_TYPES_H */\n""")
@@ -177,4 +214,19 @@ if __name__ == '__main__':
f.write(" memset(p, LIBXL_DTOR_POISON, sizeof(*p));\n")
f.write("}\n")
f.write("\n")
+
+ for ty in [t for t in types if isinstance(t,libxltypes.Enumeration)]:
+ f.write("const char *%s_to_string(%s e)\n" % (ty.typename,
ty.typename))
+ f.write("{\n")
+ f.write(libxl_C_enum_to_string(ty, "e"))
+ f.write("}\n")
+ f.write("\n")
+
+ f.write("int %s_from_string(const char *s, %s *e)\n" % (ty.typename,
ty.typename))
+ f.write("{\n")
+ f.write(libxl_C_enum_from_string(ty, "s", "*e"))
+ f.write("}\n")
+ f.write("\n")
+
f.close()
+
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