Tk_GetUid - convert from string to unique identifier
#include <tk.h> Tk_Uid Tk_GetUid(string)
Tk_GetUid(3tk) Tk Library Procedures Tk_GetUid(3tk)
______________________________________________________________________________
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 corre-
sponding 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(7) for descriptions of the following attributes:
+---------------+------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+------------------+
|Availability | runtime/tk-8 |
+---------------+------------------+
|Stability | Uncommitted |
+---------------+------------------+
NOTES
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from https://source-
forge.net/projects/tcl/files/Tcl/8.6.7/tk8.6.7-src.tar.gz/download.
Further information about this software can be found on the open source
community website at https://www.tcl.tk/.
Tk Tk_GetUid(3tk)