XtFindFile(3Xt) X Version 11 (Release 6.6) 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 characters.
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 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
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XtFindFile(3Xt) X Version 11 (Release 6.6) XtFindFile(3Xt)
no string yields a return from the predicate, 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 when it is no longer needed.
SEE ALSO
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface
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