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author | Ian Campbell <ian.campbell@citrix.com> | 2011-06-21 18:26:39 +0100 |
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committer | Ian Campbell <ian.campbell@citrix.com> | 2011-06-21 18:26:39 +0100 |
commit | a53cb5b82d0490241ec48bd0083939823b6d39f9 (patch) | |
tree | 92c484146f5c7d0c9c3ba435ecb579d380bb713e /tools/libxl/gentypes.py | |
parent | dbf20f55f0c154d11153c40f2a709b8c32bb83cc (diff) | |
download | xen-a53cb5b82d0490241ec48bd0083939823b6d39f9.tar.gz xen-a53cb5b82d0490241ec48bd0083939823b6d39f9.tar.bz2 xen-a53cb5b82d0490241ec48bd0083939823b6d39f9.zip |
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>
Diffstat (limited to 'tools/libxl/gentypes.py')
-rw-r--r-- | tools/libxl/gentypes.py | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/tools/libxl/gentypes.py b/tools/libxl/gentypes.py index e764e200af..c9a3d9c2f9 100644 --- a/tools/libxl/gentypes.py +++ b/tools/libxl/gentypes.py @@ -113,6 +113,43 @@ def libxl_C_type_destroy(ty, v, indent = " ", parent = None): 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_strings(ty, indent=""): + s = "" + s += "libxl_enum_string_table %s_string_table[] = {\n" % (ty.typename) + for v in ty.values: + s += " { .s = \"%s\", .v = %s },\n" % (v.valuename.lower(), v.name) + s += " { NULL, -1 },\n" + s += "};\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 += "return libxl__enum_from_string(%s_string_table,\n" % ty.typename + s += " %s, (int *)%s);\n" % (str, e) + + 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 +179,10 @@ 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("extern libxl_enum_string_table %s_string_table[];\n" % (ty.typename)) f.write("\n") f.write("""#endif /* __LIBXL_TYPES_H */\n""") @@ -165,6 +206,7 @@ if __name__ == '__main__': #include <string.h> #include "libxl.h" +#include "libxl_internal.h" #define LIBXL_DTOR_POISON 0xa5 @@ -177,4 +219,21 @@ 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(libxl_C_enum_strings(ty)) + + 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() |