_CP_call

_CP_call is equivalent to the call name( {string1 {, string2 {, ...}}}) BASIC statement.

Syntax

int _CP_call(int* number, CPSTR* name, int expression, { CPSTR** string1 {, CPSTR** string2 {, ... }}})

The number parameter must be a pointer to an integer. On the first call to a particular subroutine, this integer must contain -1. Upon successful return, this location will contain an index number that should be passed down to all succeeding _CP_calls to the same subroutine. This index allows the system to jump directly into the subroutine code without having to look up the name in the master dictionary.

The name parameter should be a CPSTR* pointing to the subroutine name. The subroutine to be called must be previously compiled with FlashBASIC and be cataloged in the current master dictionary. The expression must be the number of parameters to pass.

NOTE	All subroutines called must have been previously compiled with the current version of FlashBASIC.

Description

Each parameter passed to FlashBASIC must be a CPSTR**. Upon return from the subroutine, FlashBASIC will reconvert its variables back to strings, if necessary, and stuff the results back into the passed CPSTR**s.

This function returns -1 if an error occurs. The error code is contained in _CP_errno. Specific error codes include:

PE_BAD_PARAMS	Indicates that too many parameters were passed as expression. The user can only pass _CP_MAX_PARAM parameters.
PE_LOAD_ERR	Indicates that the system could not load the subroutine. The subroutine must be cataloged, and must be compiled with the current version of FlashBASIC.

Example(s)

/* call a user-written routine */

CPSTR * s = _CP_mkstr("hi");

int i = -1;

r = _CP_call(&i,s,0);

if (r < 0)

{

_CP_logoff();

exit(-1);

}

/* Now that the subroutine is loaded, it can be called */

/* very efficiently */

for (j=1; j < 100; j++) _CP_call(&i,s,0);