diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/asterisk/config.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/include/asterisk/config.h b/include/asterisk/config.h index ebc71fb8a..7a2d10135 100644 --- a/include/asterisk/config.h +++ b/include/asterisk/config.h @@ -271,6 +271,7 @@ int ast_variable_update(struct ast_category *category, const char *variable, int config_text_file_save(const char *filename, const struct ast_config *cfg, const char *generator); struct ast_config *ast_config_internal_load(const char *configfile, struct ast_config *cfg, struct ast_flags flags, const char *suggested_incl_file); + /*! \brief Support code to parse config file arguments * * The function ast_parse_arg() provides a generic interface to parse @@ -358,6 +359,45 @@ enum ast_parse_flags { int ast_parse_arg(const char *arg, enum ast_parse_flags flags, void *result, ...); +/* + * Parsing config file options in C is slightly annoying because we cannot use + * string in a switch() statement, yet we need a similar behaviour, with many + * branches and a break on a matching one. + * The following somehow simplifies the job: we create a block using + * the CV_START and CV_END macros, and then within the block we can run + * actions such as "if (condition) { body; break; }" + * Additional macros are present to run simple functions (e.g. ast_copy_string) + * or to pass arguments to ast_parse_arg() + * + * As an example: + + CV_START(v->name, v->value); // start the block + CV_STR("foo", x_foo); // static string + CV_DSTR("bar", y_bar); // malloc'ed string + CV_F("bar", ...); // call a generic function + CV_END; // end the block + */ + +/*! \brief the macro to open a block for variable parsing */ +#define CV_START(__in_var, __in_val) \ + do { \ + const char *__var = __in_var; \ + const char *__val = __in_val; + +/*! \brief close a variable parsing block */ +#define CV_END } while (0) + +/*! \brief call a generic function if the name matches. */ +#define CV_F(__pattern, __body) if (!strcasecmp((__var), __pattern)) { __body; break; } + +/*! \brief helper macros to assign the value to a BOOL, UINT, static string and + * dynamic string + */ +#define CV_BOOL(__x, __dst) CV_F(__x, (__dst) = ast_true(__val) ) +#define CV_UINT(__x, __dst) CV_F(__x, (__dst) = strtoul(__val, NULL, 0) ) +#define CV_STR(__x, __dst) CV_F(__x, ast_copy_string(__dst, __val, sizeof(__dst))) +#define CV_DSTR(__x, __dst) CV_F(__x, if (__dst) ast_free(__dst); __dst = ast_strdup(__val)) + #if defined(__cplusplus) || defined(c_plusplus) } #endif |