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Concat.3
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Tcl_Concat(3) Tcl Library Procedures
_________________________________________________________________
NAME
Tcl_Concat - concatenate a collection of strings
SYNOPSIS
#include <tcl.h>
char *
Tcl_Concat(_a_r_g_c, _a_r_g_v)
ARGUMENTS
int_a_r_g_c(in)
Number of strings.
char*_a_r_g_v[](in)
Array of strings to concatenate. Must have _a_r_g_c entries.
_________________________________________________________________
DESCRIPTION
Tcl_Concat is a utility procedure used by several of the Tcl
commands. Given a collection of strings, it concatenates
them together into a single string, with the original
strings separated by spaces. This procedure behaves dif-
ferently than Tcl_Merge, in that the arguments are simply
concatenated: no effort is made to ensure proper list struc-
ture. However, in most common usage the arguments will all
be proper lists themselves; if this is true, then the
result will also have proper list structure.
Tcl_Concat eliminates leading and trailing white space as it
copies strings from argv to the result. If an element of
argv consists of nothing but white space, then that string
is ignored entirely. This white-space removal was added to
make the output of the concat command cleaner-looking.
The result string is dynamically allocated using malloc();
the caller must eventually release the space by calling
free().
KEYWORDS
concatenate, strings
Tcl 1