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XtFindFile - search for a file using substitutions
in the path list
String XtFindFile(path, substitutions, num_substitutions,predicate)
The path parameter
specifies a string that consists of a series of potential file names delimited
by colons. Within each name, the percent character 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,
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, will collapse 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 and may therefore contain any operating-system-dependent
characters, including additional name separators. Each resulting string
is passed to the predicate procedure until a string is found for which
the procedure returns this string is the return value for If no string
yields a return from the predicate, returns NULL.
- Specifies a path of file names, including substitution characters.
- Specifies a list of substitutions to make into a path.
the number of substitutions passed in.
- Specifies a procedure to
call to judge a potential file name, or 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 when it is no longer needed.
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface
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