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!!! Start work on replacing the parsing in __execute_command_line ...
... with hook functions that are implemented elsewhere. This aims at allowing to writing and testing multiple parsers in parallel and at moving all parsing and expansion stuff to a different place.
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| Original file line number | Diff line number | Diff line change |
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| /* -*-c-*- */ | ||
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| #ifndef CMDPARSER_H | ||
| #define CMDPARSER_H | ||
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| /* ---------------------------- included header files ---------------------- */ | ||
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| /* ---------------------------- global definitions ------------------------- */ | ||
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| #define CMDPARSER_NUM_POS_ARGS 10 | ||
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| /* ---------------------------- global macros ------------------------------ */ | ||
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| /* ---------------------------- type definitions --------------------------- */ | ||
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| typedef enum | ||
| { | ||
| CP_PREFIX_NONE = 0, | ||
| CP_PREFIX_MINUS = 0x1, | ||
| CP_PREFIX_SILENT = 0x2, | ||
| CP_PREFIX_KEEPRC = 0x4 | ||
| } cmdparser_prefix_flags_t; | ||
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| /* move this to the implementation file and use void* instead??? */ | ||
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| typedef struct | ||
| { | ||
| /* !!!note: need to define which bits in here may be accessed by the | ||
| * user and which are internal */ | ||
| char is_created : 1; | ||
| /* the original command line */ | ||
| char *line; | ||
| /* the current command line */ | ||
| char *cline; | ||
| /* the expanded command line */ | ||
| char *expline; | ||
| int do_free_expline : 1; | ||
| /* the command name */ | ||
| char *command; | ||
| /* current function nesting depth */ | ||
| int call_depth; | ||
| /* an array of positional arguments; the first array element contains | ||
| * a string with all positional arguments, the remaining ten array | ||
| * elements contain the first ten positional arguments. Any of this | ||
| * may be NULL pointers */ | ||
| char *pos_args[CMDPARSER_NUM_POS_ARGS]; | ||
| } cmdparser_context_t; | ||
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| typedef struct | ||
| { | ||
| /* in general, functions in this structure that return int return | ||
| * 0: success | ||
| * > 0: unsuccessful but not an error condition | ||
| * < 0: unsuccessful, error | ||
| */ | ||
| int (*create_context)( | ||
| /* context structure to initialise */ | ||
| cmdparser_context_t *dest_context, | ||
| /* context structure of the caller or NULL */ | ||
| cmdparser_context_t *caller_context, | ||
| /* input command line */ | ||
| char *line, | ||
| /* an array of positional arguments or NULL; the first array | ||
| * element contains a string with all positional arguments, | ||
| * the remaining ten array elements contain the first ten | ||
| * positional arguments, up to the first NULL pointer; may be | ||
| * NULL if not present */ | ||
| char *pos_args[] | ||
| ); | ||
| int (*handle_line_start)(cmdparser_context_t *context); | ||
| /* Returns a set of or'ed flags of which prefixes are present on the | ||
| * command line. The prefixes are stripped. */ | ||
| cmdparser_prefix_flags_t (*handle_line_prefix)( | ||
| cmdparser_context_t *context); | ||
| /* parses and returns the command name or returns a NULL pointer if not | ||
| * possible */ | ||
| const char *(*parse_command_name)( | ||
| cmdparser_context_t *context, void *func_rc, const void *exc); | ||
| /* returns 1 if the stored command is a module configuration command | ||
| * and 0 otherwise */ | ||
| int (*is_module_config)(cmdparser_context_t *context); | ||
| /* returns the expanded command line */ | ||
| char *(*expand_command_line)( | ||
| cmdparser_context_t *context, int is_addto, void *func_rc, | ||
| const void *exc); | ||
| /* Release the expline field from the context structure and return it. | ||
| * It is then the responsibility of the caller to free() it. */ | ||
| void (*release_expanded_line)(cmdparser_context_t *context); | ||
| void (*destroy_context)(cmdparser_context_t *context); | ||
| } cmdparser_hooks_t; | ||
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| #endif /* CMDPARSER_H */ |
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