From 36a3646c2205474345482188c8c05e50d1f67e44 Mon Sep 17 00:00:00 2001 From: Zachary T Welch Date: Thu, 22 Oct 2009 07:44:54 -0700 Subject: Add macro for parsing numeric command arguments. This helper eliminates significant amount of redundant code in command handler functions throughout the system. It wraps the lower-level parse_* macros to implement a policy for reporting parse errors to the active command context (cmd_ctx). If errors do occur, this macro causes the calling function to abort with the proper return code. --- src/helper/command.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'src/helper/command.h') diff --git a/src/helper/command.h b/src/helper/command.h index ba825bcb..2d0142fd 100644 --- a/src/helper/command.h +++ b/src/helper/command.h @@ -138,6 +138,27 @@ DECLARE_PARSE_WRAPPER(_s32, int32_t); DECLARE_PARSE_WRAPPER(_s16, int16_t); DECLARE_PARSE_WRAPPER(_s8, int8_t); +/** + * @brief parses the string @a in into @a out as a @a type, or prints + * a command error and passes the error code to the caller. If an error + * does occur, the calling function will return the error code produced + * by the parsing function (one of ERROR_COMMAND_ARGUMENT_*). + * + * This function may cause the calling function to return immediately, + * so it should be used carefully to avoid leaking resources. In most + * situations, parsing should be completed in full before proceding + * to allocate resources, and this strategy will most prevents leaks. + */ +#define COMMAND_PARSE_NUMBER(type, in, out) \ + do { \ + int retval = parse_##type(in, &(out)); \ + if (ERROR_OK != retval) { \ + command_print(cmd_ctx, stringify(out) \ + " option value ('%s') is not valid", in); \ + return retval; \ + } \ + } while (0) + void script_debug(Jim_Interp *interp, const char *cmd, int argc, Jim_Obj *const *argv); #endif /* COMMAND_H */ -- cgit v1.2.3