options.c

ctags的最新版5.7,可以比较5.6版看看,免费下载

/*
 *  Cooked argument parsing
 */

static void parseShortOption (cookedArgs *const args)
{
	args->simple [0] = *args->shortOptions++;
	args->simple [1] = '\0';
	args->item = args->simple;
	if (! isCompoundOption (*args->simple))
		args->parameter = "";
	else if (*args->shortOptions == '\0')
	{
		argForth (args->args);
		if (argOff (args->args))
			args->parameter = NULL;
		else
			args->parameter = argItem (args->args);
		args->shortOptions = NULL;
	}
	else
	{
		args->parameter = args->shortOptions;
		args->shortOptions = NULL;
	}
}

static void parseLongOption (cookedArgs *const args, const char *item)
{
	const char* const equal = strchr (item, '=');
	if (equal == NULL)
	{
		args->item = eStrdup (item); /* FIXME: memory leak. */
		args->parameter = "";
	}
	else
	{
		const size_t length = equal - item;
		args->item = xMalloc (length + 1, char); /* FIXME: memory leak. */
		strncpy (args->item, item, length);
		args->item [length] = '\0';
		args->parameter = equal + 1;
	}
	Assert (args->item != NULL);
	Assert (args->parameter != NULL);
}

static void cArgRead (cookedArgs *const current)
{
	char* item;

	Assert (current != NULL);
	if (! argOff (current->args))
	{
		item = argItem (current->args);
		current->shortOptions = NULL;
		Assert (item != NULL);
		if (strncmp (item, "--", (size_t) 2) == 0)
		{
			current->isOption = TRUE;
			current->longOption = TRUE;
			parseLongOption (current, item + 2);
			Assert (current->item != NULL);
			Assert (current->parameter != NULL);
		}
		else if (*item == '-')
		{
			current->isOption = TRUE;
			current->longOption = FALSE;
			current->shortOptions = item + 1;
			parseShortOption (current);
		}
		else
		{
			current->isOption = FALSE;
			current->longOption = FALSE;
			current->item = item;
			current->parameter = NULL;
		}
	}
}

extern cookedArgs* cArgNewFromString (const char* string)
{
	cookedArgs* const result = xMalloc (1, cookedArgs);
	memset (result, 0, sizeof (cookedArgs));
	result->args = argNewFromString (string);
	cArgRead (result);
	return result;
}

extern cookedArgs* cArgNewFromArgv (char* const* const argv)
{
	cookedArgs* const result = xMalloc (1, cookedArgs);
	memset (result, 0, sizeof (cookedArgs));
	result->args = argNewFromArgv (argv);
	cArgRead (result);
	return result;
}

extern cookedArgs* cArgNewFromFile (FILE* const fp)
{
	cookedArgs* const result = xMalloc (1, cookedArgs);
	memset (result, 0, sizeof (cookedArgs));
	result->args = argNewFromFile (fp);
	cArgRead (result);
	return result;
}

extern cookedArgs* cArgNewFromLineFile (FILE* const fp)
{
	cookedArgs* const result = xMalloc (1, cookedArgs);
	memset (result, 0, sizeof (cookedArgs));
	result->args = argNewFromLineFile (fp);
	cArgRead (result);
	return result;
}

extern void cArgDelete (cookedArgs* const current)
{
	Assert (current != NULL);
	argDelete (current->args);
	memset (current, 0, sizeof (cookedArgs));
	eFree (current);
}

static boolean cArgOptionPending (cookedArgs* const current)
{
	boolean result = FALSE;
	if (current->shortOptions != NULL)
		if (*current->shortOptions != '\0')
			result = TRUE;
	return result;
}

extern boolean cArgOff (cookedArgs* const current)
{
	Assert (current != NULL);
	return (boolean) (argOff (current->args) && ! cArgOptionPending (current));
}

extern boolean cArgIsOption (cookedArgs* const current)
{
	Assert (current != NULL);
	return current->isOption;
}

extern const char* cArgItem (cookedArgs* const current)
{
	Assert (current != NULL);
	return current->item;
}

extern void cArgForth (cookedArgs* const current)
{
	Assert (current != NULL);
	Assert (! cArgOff (current));
	if (cArgOptionPending (current))
		parseShortOption (current);
	else
	{
		Assert (! argOff (current->args));
		argForth (current->args);
		if (! argOff (current->args))
			cArgRead (current);
		else
		{
			current->isOption = FALSE;
			current->longOption = FALSE;
			current->shortOptions = NULL;
			current->item = NULL;
			current->parameter = NULL;
		}
	}
}

/*
 *  File extension and language mapping
 */

static void addExtensionList (
		stringList *const slist, const char *const elist, const boolean clear)
{
	char *const extensionList = eStrdup (elist);
	const char *extension = NULL;
	boolean first = TRUE;

	if (clear)
	{
		verbose ("      clearing\n");
		stringListClear (slist);
	}
	verbose ("      adding: ");
	if (elist != NULL  &&  *elist != '\0')
	{
		extension = extensionList;
		if (elist [0] == EXTENSION_SEPARATOR)
			++extension;
	}
	while (extension != NULL)
	{
		char *separator = strchr (extension, EXTENSION_SEPARATOR);
		if (separator != NULL)
			*separator = '\0';
		verbose ("%s%s", first ? "" : ", ",
				*extension == '\0' ? "(NONE)" : extension);
		stringListAdd (slist, vStringNewInit (extension));
		first = FALSE;
		if (separator == NULL)
			extension = NULL;
		else
			extension = separator + 1;
	}
	if (Option.verbose)
	{
		printf ("\n      now: ");
		stringListPrint (slist);
		putchar ('\n');
	}
	eFree (extensionList);
}

static boolean isFalse (const char *parameter)
{
	return (boolean) (
		strcasecmp (parameter, "0"  ) == 0  ||
		strcasecmp (parameter, "n"  ) == 0  ||
		strcasecmp (parameter, "no" ) == 0  ||
		strcasecmp (parameter, "off") == 0);
}

static boolean isTrue (const char *parameter)
{
	return (boolean) (
		strcasecmp (parameter, "1"  ) == 0  ||
		strcasecmp (parameter, "y"  ) == 0  ||
		strcasecmp (parameter, "yes") == 0  ||
		strcasecmp (parameter, "on" ) == 0);
}

/*  Determines whether the specified file name is considered to be a header
 *  file for the purposes of determining whether enclosed tags are global or
 *  static.
 */
extern boolean isIncludeFile (const char *const fileName)
{
	boolean result = FALSE;
	const char *const extension = fileExtension (fileName);
	if (Option.headerExt != NULL)
		result = stringListExtensionMatched (Option.headerExt, extension);
	return result;
}

/*
 *  Specific option processing
 */

static void processEtagsInclude (
		const char *const option, const char *const parameter)
{
	if (! Option.etags)
		error (FATAL, "Etags must be enabled to use \"%s\" option", option);
	else
	{
		vString *const file = vStringNewInit (parameter);
		if (Option.etagsInclude == NULL)
			Option.etagsInclude = stringListNew ();
		stringListAdd (Option.etagsInclude, file);
		FilesRequired = FALSE;
	}
}

static void processExcludeOption (
		const char *const option __unused__, const char *const parameter)
{
	const char *const fileName = parameter + 1;
	if (parameter [0] == '\0')
		freeList (&Excluded);
	else if (parameter [0] == '@')
	{
		stringList* const sl = stringListNewFromFile (fileName);
		if (sl == NULL)
			error (FATAL | PERROR, "cannot open \"%s\"", fileName);
		if (Excluded == NULL)
			Excluded = sl;
		else
			stringListCombine (Excluded, sl);
		verbose ("    adding exclude patterns from %s\n", fileName);
	}
	else
	{
		vString *const item = vStringNewInit (parameter);
		if (Excluded == NULL)
			Excluded = stringListNew ();
		stringListAdd (Excluded, item);
		verbose ("    adding exclude pattern: %s\n", parameter);
	}
}

extern boolean isExcludedFile (const char* const name)
{
	const char* base = baseFilename (name);
	boolean result = FALSE;
	if (Excluded != NULL)
	{
		result = stringListFileMatched (Excluded, base);
		if (! result  &&  name != base)
			result = stringListFileMatched (Excluded, name);
	}
#ifdef AMIGA
	/* not a good solution, but the only one which works often */
	if (! result)
		result = (boolean) (strcmp (name, TagFile.name) == 0);
#endif
	return result;
}

static void processExcmdOption (
		const char *const option, const char *const parameter)
{
	switch (*parameter)
	{
		case 'm': Option.locate = EX_MIX;     break;
		case 'n': Option.locate = EX_LINENUM; break;
		case 'p': Option.locate = EX_PATTERN; break;
		default:
			error (FATAL, "Invalid value for \"%s\" option", option);
			break;
	}
}

static void processExtraTagsOption (
		const char *const option, const char *const parameter)
{
	struct sInclude *const inc = &Option.include;
	const char *p = parameter;
	boolean mode = TRUE;
	int c;

	if (*p != '+'  &&  *p != '-')
	{
		inc->fileNames     = FALSE;
		inc->qualifiedTags = FALSE;
#if 0
		inc->fileScope     = FALSE;
#endif
	}
	while ((c = *p++) != '\0') switch (c)
	{
		case '+': mode = TRUE;                break;
		case '-': mode = FALSE;               break;

		case 'f': inc->fileNames     = mode;  break;
		case 'q': inc->qualifiedTags = mode;  break;
#if 0
		case 'F': inc->fileScope     = mode;  break;
#endif

		default: error(WARNING, "Unsupported parameter '%c' for \"%s\" option",
					   c, option);
			break;
	}
}

static void processFieldsOption (
		const char *const option, const char *const parameter)
{
	struct sExtFields *field = &Option.extensionFields;
	const char *p = parameter;
	boolean mode = TRUE;
	int c;

	if (*p != '+'  &&  *p != '-')
	{
		field->access           = FALSE;
		field->fileScope        = FALSE;
		field->implementation   = FALSE;
		field->inheritance      = FALSE;
		field->kind             = FALSE;
		field->kindKey          = FALSE;
		field->kindLong         = FALSE;
		field->language         = FALSE;
		field->scope            = FALSE;
		field->typeRef          = FALSE;
	}
	while ((c = *p++) != '\0') switch (c)
	{
		case '+': mode = TRUE;                  break;
		case '-': mode = FALSE;                 break;

		case 'a': field->access         = mode; break;
		case 'f': field->fileScope      = mode; break;
		case 'm': field->implementation = mode; break;
		case 'i': field->inheritance    = mode; break;
		case 'k': field->kind           = mode; break;
		case 'K': field->kindLong       = mode; break;
		case 'l': field->language       = mode; break;
		case 'n': field->lineNumber     = mode; break;
		case 's': field->scope          = mode; break;
		case 'S': field->signature      = mode; break;
		case 'z': field->kindKey        = mode; break;
		case 't': field->typeRef        = mode; break;

		default: error(WARNING, "Unsupported parameter '%c' for \"%s\" option",
					c, option);
			break;
	}
}

static void processFilterTerminatorOption (
		const char *const option __unused__, const char *const parameter)
{
	freeString (&Option.filterTerminator);
	Option.filterTerminator = stringCopy (parameter);
}

static void processFormatOption (
		const char *const option, const char *const parameter)
{
	unsigned int format;

	if (sscanf (parameter, "%u", &format) < 1)
		error (FATAL, "Invalid value for \"%s\" option",option);
	else if (format <= (unsigned int) MaxSupportedTagFormat)
		Option.tagFileFormat = format;
	else
		error (FATAL, "Unsupported value for \"%s\" option", option);
}

static void printInvocationDescription (void)
{
	printf (INVOCATION, getExecutableName ());
}

static void printOptionDescriptions (const optionDescription *const optDesc)
{
	int i;
	for (i = 0 ; optDesc [i].description != NULL ; ++i)
	{
		if (! Option.etags || optDesc [i].usedByEtags)
			puts (optDesc [i].description);
	}
}

static void printFeatureList (void)
{
	int i;

	for (i = 0 ; Features [i] != NULL ; ++i)
	{
		if (i == 0)
			printf ("  Optional compiled features: ");
		printf ("%s+%s", (i>0 ? ", " : ""), Features [i]);
#ifdef CUSTOM_CONFIGURATION_FILE
		if (strcmp (Features [i], "custom-conf") == 0)
			printf ("=%s", CUSTOM_CONFIGURATION_FILE);
#endif