[PHP-DEV] adding functions to php4(simple question ?) From: Jinsoo Hwang (jshwang <email protected>)
Date: 08/09/00

Hi,
I try to include some statistical function module on my php4.
I have gotten C-source codes , compiled and installed
under /usr/local/lib/libRmath.a on my Solaris 2.7 station.
The following is the part of the original C-source(wilcox.c).-
-----------
..
static double ***w;
...
static void
w_init_maybe(int m, int n)
{
  int i;
  ....
  if (!w) {
   ...
   w = (double ***) calloc(m+1, sizeof(double **));
   if (!w)
     MATHLIB_ERROR("wilcox allocation error %d", 1);
...
}
...
double pwilcox(double x, double m, double n, int lower, int log_p)
...
w_init_maybe(m,n)
...
}/* pwilcox */
----------------------------------
I have made necessary files using ext_skel script and modified config.m4
and stat.c files under php4.
This is a part of my stat.c file in question.

----------------------------------
...
function_entry_stat_functions[] = {
  PHP_FE(p_wilcox, NULL)
....
PHP_FUNCTION(p_wilcox)
{
zval **x, **m, **n, **lower, **log_p ;
double a, b, c;
int t, p;
double ret_val;
....
convert_to_double_ex(x);
...
convert_to_long_ex(log_p)

a = (*x)->value.lval;
..
p = (*log_p)->value.lval;

ret_val=pwilcox(a,b,c,t,p);
RETURN_DOUBLE(ret_val);
}
#endif /* HAVE_STAT */
------------------------------

On my shell, I tried to test it by tying
>./php -f ext/stat/stat.php

It gave me 

---
wilcox allocation error 1
---------

--<stat.php>---
..
$x=6.0;
..
$retval = p_wilcox(6.0, 3.0, 4.0, 1, 1);
echo "pwilcox=";
echo "$retval";
---------------

I do not know how to handle "w" on my stat.c file.
I looked into apidoc.txt but due to my shallow c-knowledge,
it doesn't help much.
Could someone give me a hint to go on ?
Thanks.

Jinsoo

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