XtFindFile - search for a file using substitutions in the path list
#include <X11/Intrinsic.h> char * XtFindFile(const char *path, Substitution substitutions, Cardi- nal num_substitutions, XtFilePredicate predicate);
path Specifies a path of file names, including substitution char- acters. 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.
The path parameter specifies a string that consists of a series of potential file names delimited by colons. Within each name, the per- cent character specifies a string substitution selected by the follow- ing 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 charac- ters with the string in the corresponding substitution field. A sub- stitution 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 sin- gle separator, XtFindFile will collapse multiple separators into a sin- gle one after performing all string substitutions. Except for collaps- ing embedded separators, the contents of the string substitutions are not interpreted by XtFindFile 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 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.
X Toolkit Intrinsics – C Language Interface Xlib - C Language X Interface X Version 11 libXt 126.96.36.199 XtFindFile(3)