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XtFindFile(3Xt)			XT FUNCTIONS		      XtFindFile(3Xt)



NAME
  XtFindFile - search for a file using substitutions in the path list

SYNTAX
  String XtFindFile(path, substitutions, num_substitutions,predicate)
	String path;
	Substitution substitutions;
	Cardinal num_substitutions;
	XtFilePredicate predicate;

ARGUMENTS

  path	    Specifies a path of file names, including substitution charac-
	    ters.

  substitutions
	    Specifies a list of substitutions to make into a path.

  num_substitutions
	    Specifies the number of substitutions passed in.

  predicate Specifies a procedure to call to judge a potential file name, or
	    NULL.

DESCRIPTION
  The path parameter specifies a string that consists of a series of poten-
  tial file names delimited by colons.	Within each name, the percent charac-
  ter specifies a string substitution selected by the following character.
  The character sequence ``%:'' specifies an embedded colon that is not a
  delimiter; the sequence is replaced by a single colon.  The character
  sequence ``%%'' specifies a percent character that does not introduce a
  substitution; the sequence is replaced by a single percent character.	 If a
  percent character is followed by any other character, XtFindFile looks
  through the specified substitutions for that character in the match field
  and if found replaces the percent and match characters with the string in
  the corresponding substitution field.	 A substitution field entry of NULL
  is equivalent to a pointer to an empty string.  If the operating system
  does not interpret multiple embedded name separators in the path (i.e.,
  ``/'' in POSIX) the same way as a single separator, XtFindFile will col-
  lapse multiple separators into a single one after performing all string
  substitutions.  Except for collapsing embedded separators, the contents of
  the string substitutions are not interpreted by XtFindFile and may there-
  fore contain any operating-system-dependent characters, including addi-
  tional name separators.  Each resulting string is passed to the predicate
  procedure until a string is found for which the procedure returns True;
  this string is the return value for XtFindFile.  If no string yields a True
  return from the predicate, XtFindFile returns NULL.

  If the predicate parameter is NULL, an internal procedure that checks if
  the file exists, is readable, and is not a directory will be used.

  It is the responsibility of the caller to free the returned string using
  XtFree when it is no longer needed.

SEE ALSO
  X Toolkit Intrinsics - C Language Interface
  Xlib - C Language X Interface


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