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/**************************************\
* *
* main routines for wool interpreter *
* *
\**************************************/
#define WLPROFILE_USER_VARIABLE "WOOLPROFILE"
#define WLPATH_SHELL_VARIABLE "WOOLPATH"
#include <signal.h>
#include <stdio.h>
#include "EXTERN.h"
#include "wool.h"
#include "wl_atom.h"
#include "wl_coll.h"
#include "wl_func.h"
#include "wl_list.h"
#include "wl_number.h"
#include "wl_string.h"
#include "wl_pointer.h"
#include "wl_active.h"
#include "wl_name.h"
#include "yacc.h"
char *RCS_Header = /* the version */
"$Id: main.c,v 1.1.1.1 1996/02/09 01:43:19 kevin Exp $";
char buffer[8192]; /* input buffer */
WOOL_OBJECT wool_eval_expr;
DECLARE_strchr;
timeout_handler(); /* alarm handler */
#define MAX_DURATION 0 /* max time of an eval in seconds */
WOOL_Atom timeout; /* the wool atom "timeout" */
void wool_types_init();
main_init();
main(argc, argv)
int argc;
char *argv[];
{
char *s;
extern char *wool_fix_path();
/* option parsing */
wool_user_profile_name = ".woolrc";
wool_text_extension = ".wl";
print_banner();
/* initialize paths (put .:$HOME before built-ins) */
wool_path = wool_fix_path(DEFAULT_WLPATH);
if ((s = (char *) getenv(WLPROFILE_USER_VARIABLE)) && (s[0] != '\0'))
wool_user_profile_name = s;
if ((s = (char *) getenv(WLPATH_SHELL_VARIABLE)) && (s[0] != '\0'))
wool_path = s;
/* first, initialize wool */
wool_init(wool_types_init);
/* get the atoms we want */
timeout = wool_atom("timeout");
/* then tell it to go back here after an error */
set_wool_error_resume_point(); /* wool_error will jump here */
/* main routine: read/eval/print */
do {
/* initialize the input "pool" of wool */
wool_pool(NULL);
/*
* then we prompt the user until we think we have a complete
* expression (as we are told by the return code of wool_pool)
*/
do {
int i;
wool_puts("? ");
for (i = 0; i < 2 * wool_pool_parentheses_level; i++)
wool_putchar(' ');
if (!gets(buffer)) {
/*
* as we use wool_pool, we must take care of the end_of_file
* ourselves.
*/
wool_puts("Bye.\n");
exit(0);
}
} while (wool_pool(buffer));
/* so, now we can read/eval/print this pooled text
* add newline at the end for lex problems
*/
strcat(wool_pool_buffer, "\n");
wool_input_redirect(1, wool_pool_buffer, NULL, NULL);
/*
* we read all the expressions of this line, the NULL returned by
* wool_read meaning the end of the input (here the pool)
*/
while (wool_read()) {
/* we set the timeout for an eval to timeout */
alarm(timeout -> c_val ?
((WOOL_Number) (timeout -> c_val)) -> number
: MAX_DURATION);
if (wool_eval_expr = wool_eval(wool_read_expr)) {
wool_puts(" = ");
wool_print(wool_eval_expr);
wool_putchar('\n');
}
}
} while (1);
}
/*
* Test initialisations
*/
int variable = 8;
print_var()
{
printf("Var is %d\n", variable);
return NULL;
}
int (*fp)();
/* what to do when a wool-error occurs?
*/
wool_error_handler()
{
}
/* wool_end is exiting */
wool_end(n)
int n;
{
#ifdef MONITOR
moncontrol(0); /* do not trace ending code */
#endif /* MONITOR */
exit(n);
}
/* handler called by wool before execing a son after a fork
*/
wool_clean_before_exec()
{
}
char *
strchr_nth(s, c, n)
char *s, c;
int n;
{
while (s && n) {
s = strchr(s + 1, c);
n--;
}
return s;
}
print_banner()
{
char banner[128];
int banner_len = strchr_nth(RCS_Header, ' ', 4)
- strchr_nth(RCS_Header, ' ', 2) - 1;
strncpy(banner, strchr_nth(RCS_Header, ' ', 2) + 1, banner_len);
banner[banner_len] = '\0';
wool_printf("WOOL toplevel %s\n", banner);
}
/* you must initialize here all the used wool types in your application */
void
wool_types_init()
{
#define init_wool_type(type, name) type[0]=(WOOL_METHOD)wool_atom(name)
init_wool_type(WLActive, "active");
init_wool_type(WLAtom, "atom");
init_wool_type(WLCollection, "collection");
init_wool_type(WLQuotedExpr, "quoted-expr");
init_wool_type(WLSubr, "subr");
init_wool_type(WLFSubr, "fsubr");
init_wool_type(WLExpr, "expr");
init_wool_type(WLFExpr, "fexpr");
init_wool_type(WLList, "list");
init_wool_type(WLName, "name");
init_wool_type(WLNamespace, "namespace");
init_wool_type(WLNumber, "number");
init_wool_type(WLPointer, "pointer");
init_wool_type(WLString, "string");
#undef init_wool_type
}
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