XtFindFile(3Xt) XT FUNCTIONS XtFindFile(3Xt)NAMEXtFindFile - search for a file using substitutions in the
path list
SYNTAX
String XtFindFile(path, substitutions, num_substitu-
tions,predicate)
String path;
Substitution substitutions;
Cardinal num_substitutions;
XtFilePredicate predicate;
ARGUMENTS
path Specifies a path of file names, including sub-
stitution 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 poten-
tial 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 charac-
ter 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 oper-
ating 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 substitu-
tions. Except for collapsing embedded separators, the
contents of the string substitutions are not interpreted
by and may therefore contain any operating-system-depen-
dent 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.
X Version 11 Release 6.4 1
XtFindFile(3Xt) XT FUNCTIONS XtFindFile(3Xt)
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
X Version 11 Release 6.4 2
