On Mon, 5 May 2008 16:01:45 -0500 (CDT), "Paul" <-@[EMAIL PROTECTED]
> wrote
in comp.lang.c.moderated:
> How do I find the length of strings within an array at compile time?
>
> The following is not safe:
>
> const char* MyStrings[] =
> {
> "one",
> "two",
> "three",
> "end marker"
> }
>
> #define StringLength(index) MyStrings[index+1] - MyStrings[index]
>
> Since the strings may not be placed consecutively, or in order, within
> memory.
>
> Also
>
> #define String1 "one"
> #define String2 "two"
> #define String3 "three"
>
> const char* MyStrings[] =
> {
> String1,
> String2,
> String3
> }
>
> int StringLengths[] =
^^^ much better size_t, that's what it's for.
> {
> size(String1),
> size(String2),
> size(String3)
> }
> is a bit too ***bersome.
>
> Any better suggestions?
static const char mys1 [] = "one";
static const char mys2 [] = "two";
static const char mys3 [] = "three";
static const char mys4 [] = "eleventy-two";
static const char mys5 [] = "end marker";
const char* MyStrings [] =
{
mys1, mys2, mys3, mys4, mys5
};
const size_t MySizes [] =
{
sizeof mys1, sizeof mys2, sizeof mys3, sizeof mys4, sizeof mys5
};
If you want the equivalent of what strlen() would return, subtract 1
from the sizeof value, either in the array initialization or when
using the values.
--
Jack Klein
Home: http://JK-Technology.Com
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