tk_getuid(3tk) [opensolaris man page]

Tk_GetUid(3TK)						       Tk Library Procedures						    Tk_GetUid(3TK)

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NAME

       Tk_GetUid, Tk_Uid - convert from string to unique identifier

SYNOPSIS

       #include <tk.h>

       Tk_Uid
       Tk_GetUid(string)

ARGUMENTS

       char	    *string	       (in)	 String for which the corresponding unique identifier is desired.
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DESCRIPTION

       Tk_GetUid  returns  the	unique identifier corresponding to string.  Unique identifiers are similar to atoms in Lisp, and are used in Tk to
       speed up comparisons and searches.  A unique identifier (type Tk_Uid) is a string pointer and may be used anywhere that a variable of  type
       ``char  *''  could  be used.  However, there is guaranteed to be exactly one unique identifier for any given string value.  If Tk_GetUid is
       called twice, once with string a and once with string b, and if a and b have the same string value (strcmp(a, b) == 0), then Tk_GetUid will
       return  exactly	the  same Tk_Uid value for each call (Tk_GetUid(a) == Tk_GetUid(b)).  This means that variables of type Tk_Uid may be com-
       pared directly (x == y) without having to call strcmp.  In addition, the return value from Tk_GetUid will have the same string value as its
       argument (strcmp(Tk_GetUid(a), a) == 0).

KEYWORDS

       atom, unique identifier

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +--------------------+-----------------+
       |  ATTRIBUTE TYPE    | ATTRIBUTE VALUE |
       +--------------------+-----------------+
       |Availability	    | SUNWTk	      |
       +--------------------+-----------------+
       |Interface Stability | Uncommitted     |
       +--------------------+-----------------+
NOTES

       Source for Tk is available on http://opensolaris.org.

Tk																    Tk_GetUid(3TK)