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Diffstat (limited to 'src/lib/conf/conftesting.h')
| -rw-r--r-- | src/lib/conf/conftesting.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/src/lib/conf/conftesting.h b/src/lib/conf/conftesting.h new file mode 100644 index 0000000000..f01f52d59e --- /dev/null +++ b/src/lib/conf/conftesting.h @@ -0,0 +1,86 @@ +/* Copyright (c) 2001 Matej Pfajfar. + * Copyright (c) 2001-2004, Roger Dingledine. + * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson. + * Copyright (c) 2007-2019, The Tor Project, Inc. */ +/* See LICENSE for licensing information */ + +/** + * @file conftesting.h + * @brief Macro and type declarations for testing + **/ + +#ifndef TOR_LIB_CONF_CONFTESTING_H +#define TOR_LIB_CONF_CONFTESTING_H + +#ifdef TOR_UNIT_TESTS +/** + * Union used when building in test mode typechecking the members of a type + * used with confparse.c. See CONF_CHECK_VAR_TYPE for a description of how + * it is used. */ +typedef union { + char **STRING; + char **FILENAME; + int *POSINT; /* yes, this is really an int, and not an unsigned int. For + * historical reasons, many configuration values are restricted + * to the range [0,INT_MAX], and stored in signed ints. + */ + uint64_t *UINT64; + int *INT; + int *INTERVAL; + int *MSEC_INTERVAL; + uint64_t *MEMUNIT; + double *DOUBLE; + int *BOOL; + int *AUTOBOOL; + time_t *ISOTIME; + struct smartlist_t **CSV; + int *CSV_INTERVAL; + struct config_line_t **LINELIST; + struct config_line_t **LINELIST_S; + struct config_line_t **LINELIST_V; + // XXXX this doesn't belong at this level of abstraction. + struct routerset_t **ROUTERSET; +} confparse_dummy_values_t; +#endif /* defined(TOR_UNIT_TESTS) */ + +/* Macros to define extra members inside config_var_t fields, and at the + * end of a list of them. + */ +#ifdef TOR_UNIT_TESTS +/* This is a somewhat magic type-checking macro for users of confparse.c. + * It initializes a union member "confparse_dummy_values_t.conftype" with + * the address of a static member "tp_dummy.member". This + * will give a compiler warning unless the member field is of the correct + * type. + * + * (This warning is mandatory, because a type mismatch here violates the type + * compatibility constraint for simple assignment, and requires a diagnostic, + * according to the C spec.) + * + * For example, suppose you say: + * "CONF_CHECK_VAR_TYPE(or_options_t, STRING, Address)". + * Then this macro will evaluate to: + * { .STRING = &or_options_t_dummy.Address } + * And since confparse_dummy_values_t.STRING has type "char **", that + * expression will create a warning unless or_options_t.Address also + * has type "char *". + */ +#define CONF_CHECK_VAR_TYPE(tp, conftype, member) \ + { . conftype = &tp ## _dummy . member } +#define CONF_TEST_MEMBERS(tp, conftype, member) \ + , .var_ptr_dummy=CONF_CHECK_VAR_TYPE(tp, conftype, member) +#define DUMMY_CONF_TEST_MEMBERS , .var_ptr_dummy={ .INT=NULL } +#define DUMMY_TYPECHECK_INSTANCE(tp) \ + static tp tp ## _dummy + +#else /* !defined(TOR_UNIT_TESTS) */ + +#define CONF_TEST_MEMBERS(tp, conftype, member) +/* Repeatedly declarable incomplete struct to absorb redundant semicolons */ +#define DUMMY_TYPECHECK_INSTANCE(tp) \ + struct tor_semicolon_eater +#define DUMMY_CONF_TEST_MEMBERS + +#endif /* defined(TOR_UNIT_TESTS) */ + +#endif /* !defined(TOR_LIB_CONF_CONFTESTING_H) */ |