NAME

       XrmGetFileDatabase, XrmPutFileDatabase, XrmGetStringDatabase, XrmLocaleOfDatabase, XrmGetDatabase,
       XrmSetDatabase, XrmDestroyDatabase - retrieve and store resource databases

SYNTAX

       #include <X11/Xresource.h>

       XrmDatabase XrmGetFileDatabase(char *filename);

       void XrmPutFileDatabase(XrmDatabase database, char *stored_db);

       XrmDatabase XrmGetStringDatabase(char *data,

       char *XrmLocaleOfDatabase(XrmDatabase database);

       XrmDatabase XrmGetDatabase(Display *display);

       void XrmSetDatabase(Display *display, XrmDatabase database);

       void XrmDestroyDatabase(XrmDatabase database);

ARGUMENTS

       filename  Specifies the resource database file name.

       database  Specifies the database that is to be used.

       stored_db Specifies the file name for the stored database.

       data      Specifies the database contents using a string.

       database  Specifies the resource database.

       display   Specifies the connection to the X server.

DESCRIPTION

       The XrmGetFileDatabase function opens the specified file, creates a new resource database, and loads it
       with the specifications read in from the specified file.  The specified file should contain a sequence of
       entries in valid ResourceLine format (see section 15.1); the database that results from reading a file
       with incorrect syntax is implementation-dependent.  The file is parsed in the current locale, and the
       database is created in the current locale.  If it cannot open the specified file, XrmGetFileDatabase
       returns NULL.

       The XrmPutFileDatabase function stores a copy of the specified database in the specified file.  Text is
       written to the file as a sequence of entries in valid ResourceLine format (see section 15.1).  The file
       is written in the locale of the database.  Entries containing resource names that are not in the Host
       Portable Character Encoding or containing values that are not in the encoding of the database locale, are
       written in an implementation-dependent manner.  The order in which entries are written is implementation-
       dependent.  Entries with representation types other than ``String'' are ignored.

       The XrmGetStringDatabase function creates a new database and stores the resources specified in the
       specified null-terminated string.  XrmGetStringDatabase is similar to XrmGetFileDatabase except that it
       reads the information out of a string instead of out of a file.  The string should contain a sequence of
       entries in valid ResourceLine format (see section 15.1) terminated by a null character; the database that
       results from using a string with incorrect syntax is implementation-dependent.  The string is parsed in
       the current locale, and the database is created in the current locale.

       If database is NULL, XrmDestroyDatabase returns immediately.

       The XrmLocaleOfDatabase function returns the name of the locale bound to the specified database, as a
       null-terminated string.  The returned locale name string is owned by Xlib and should not be modified or
       freed by the client.  Xlib is not permitted to free the string until the database is destroyed.  Until
       the string is freed, it will not be modified by Xlib.

       The XrmGetDatabase function returns the database associated with the specified display.  It returns NULL
       if a database has not yet been set.

       The XrmSetDatabase function associates the specified resource database (or NULL) with the specified
       display.  The database previously associated with the display (if any) is not destroyed.  A client or
       toolkit may find this function convenient for retaining a database once it is constructed.

FILE SYNTAX

       The syntax of a resource file is a sequence of resource lines terminated by newline characters or the end
       of the file.  The syntax of an individual resource line is:

       ResourceLine   =    Comment | IncludeFile | ResourceSpec | <empty line>
       Comment   =    "!" {<any character except null or newline>}
       IncludeFile    =    "#" WhiteSpace "include" WhiteSpace FileName WhiteSpace
       FileName  =    <valid filename for operating system>
       ResourceSpec   =    WhiteSpace ResourceName WhiteSpace ":" WhiteSpace Value
       ResourceName   =    [Binding] {Component Binding} ComponentName
       Binding   =    "." | "*"
       WhiteSpace     =    {<space> | <horizontal tab>}
       Component =    "?" | ComponentName
       ComponentName  =    NameChar {NameChar}
       NameChar  =    "a"-"z" | "A"-"Z" | "0"-"9" | "_" | "-"
       Value     =    {<any character except null or unescaped newline>}

       Elements separated by vertical bar (|) are alternatives.  Curly braces ({...}) indicate zero or more
       repetitions of the enclosed elements.  Square brackets ([...]) indicate that the enclosed element is
       optional.  Quotes ("...") are used around literal characters.

       IncludeFile lines are interpreted by replacing the line with the contents of the specified file.  The
       word ``include'' must be in lowercase.  The file name is interpreted relative to the directory of the
       file in which the line occurs (for example, if the file name contains no directory or contains a relative
       directory specification).

       If a ResourceName contains a contiguous sequence of two or more Binding characters, the sequence will be
       replaced with single ``.'' character if the sequence contains only ``.'' characters; otherwise, the
       sequence will be replaced with a single ``*'' character.

       A resource database never contains more than one entry for a given ResourceName.  If a resource file
       contains multiple lines with the same ResourceName, the last line in the file is used.

       Any white space characters before or after the name or colon in a ResourceSpec are ignored.  To allow a
       Value to begin with white space, the two-character sequence ``\space'' (backslash followed by space) is
       recognized and replaced by a space character, and the two-character sequence ``\tab'' (backslash followed
       by horizontal tab) is recognized and replaced by a horizontal tab character.  To allow a Value to contain
       embedded newline characters, the two-character sequence ``\n'' is recognized and replaced by a newline
       character.  To allow a Value to be broken across multiple lines in a text file, the two-character
       sequence ``\newline'' (backslash followed by newline) is recognized and removed from the value.  To allow
       a Value to contain arbitrary character codes, the four-character sequence ``\nnn'', where each n is a
       digit character in the range of ``0''-``7'', is recognized and replaced with a single byte that contains
       the octal value specified by the sequence.  Finally, the two-character sequence ``\\'' is recognized and
       replaced with a single backslash.

SEE ALSO

       XrmGetResource(3), XrmInitialize(3), XrmPutResource(3)
       Xlib - C Language X Interface