scummvm/debugrl.cpp

#ifdef HAVE_READLINE

#include "debugrl.h"

// A lot of this was ripped straight from the readline fileman.c example.

char *_debugger_commands[] = {
	"help",
	"quit",
	"go",
	"actor",
	"scripts",
	"exit",
	(char *)NULL
};


// forwards decls
char **scumm_debugger_completion(const char *text, int start, int end);
char *scumm_debugger_command_generator(const char *text, int state);

void initialize_readline()
{
	/* Allow conditional parsing of the ~/.inputrc file. */
	rl_readline_name = "scummvm";

	/* Tell the completer that we want a crack first. */
	rl_attempted_completion_function = scumm_debugger_completion;
}

char **scumm_debugger_completion(const char *text, int start, int end)
{

	char **matches;

	matches = (char **)NULL;

	// If this word is at the start of the line, then it is a command
	// to complete.
	if (start == 0) {
		matches = rl_completion_matches(text, scumm_debugger_command_generator);
	} else {
		// At some stage it'd be nice to have symbolic actor name completion
		// or something similarly groovy. Not right now though.
	}

	// This just makes sure that readline doesn't try to use its default
	// completer, which uses filenames in the current dir, if we can't find 
	// a match, since filenames don't have much use in the debuger :)
	// There's probably a nice way to do this once, rather than every time.
	rl_attempted_completion_over = 1;

	return (matches);
}


/* Generator function for command completion.  STATE lets us know whether
   to start from scratch; without any state (i.e. STATE == 0), then we
   start at the top of the list. */
char *scumm_debugger_command_generator(const char *text, int state)
{

	static int list_index, len;
	char *name;

	/* If this is a new word to complete, initialize now.  This includes
	   saving the length of TEXT for efficiency, and initializing the index
	   variable to 0. */
	if (!state) {
		list_index = 0;
		len = strlen(text);
	}

	/* Return the next name which partially matches from the command list. */
	while (name = _debugger_commands[list_index]) {
		list_index++;

		if (strncmp(name, text, len) == 0)
			//return (dupstr(name));
			return strdup(name);
	}

	/* If no names matched, then return NULL. */
	return ((char *)NULL);
}

#endif /* HAVE_READLINE */