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qse/ase/awk/run.c

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/*
* $Id: run.c,v 1.64 2006-04-20 16:17:01 bacon Exp $
*/
#include <xp/awk/awk_i.h>
/* TODO: remove this dependency...*/
#include <math.h>
#ifndef XP_AWK_STAND_ALONE
#include <xp/bas/assert.h>
#include <xp/bas/string.h>
#include <xp/bas/memory.h>
#endif
#define STACK_INCREMENT 512
#define STACK_AT(awk,n) ((awk)->run.stack[(awk)->run.stack_base+(n)])
#define STACK_NARGS(awk) (STACK_AT(awk,3))
#define STACK_ARG(awk,n) STACK_AT(awk,3+1+(n))
#define STACK_LOCAL(awk,n) STACK_AT(awk,3+(xp_size_t)STACK_NARGS(awk)+1+(n))
#define STACK_RETVAL(awk) STACK_AT(awk,2)
#define STACK_GLOBAL(awk,n) ((awk)->run.stack[(n)])
#define STACK_RETVAL_GLOBAL(awk) ((awk)->run.stack[(awk)->tree.nglobals+2])
#define EXIT_NONE 0
#define EXIT_BREAK 1
#define EXIT_CONTINUE 2
#define EXIT_FUNCTION 3
#define EXIT_GLOBAL 4
#define PANIC(awk,code) \
do { (awk)->errnum = (code); return XP_NULL; } while (0)
#define PANIC_I(awk,code) \
do { (awk)->errnum = (code); return -1; } while (0)
static int __run_block (xp_awk_t* awk, xp_awk_nde_blk_t* nde);
static int __run_statement (xp_awk_t* awk, xp_awk_nde_t* nde);
static int __run_if_statement (xp_awk_t* awk, xp_awk_nde_if_t* nde);
static int __run_while_statement (xp_awk_t* awk, xp_awk_nde_while_t* nde);
static int __run_for_statement (xp_awk_t* awk, xp_awk_nde_for_t* nde);
static int __run_break_statement (xp_awk_t* awk, xp_awk_nde_break_t* nde);
static int __run_continue_statement (xp_awk_t* awk, xp_awk_nde_continue_t* nde);
static int __run_return_statement (xp_awk_t* awk, xp_awk_nde_return_t* nde);
static int __run_exit_statement (xp_awk_t* awk, xp_awk_nde_exit_t* nde);
static xp_awk_val_t* __eval_expression (xp_awk_t* awk, xp_awk_nde_t* nde);
static xp_awk_val_t* __eval_assignment (xp_awk_t* awk, xp_awk_nde_t* nde);
static xp_awk_val_t* __do_assignment (
xp_awk_t* awk, xp_awk_nde_var_t* var, xp_awk_val_t* val);
static xp_awk_val_t* __do_assignment_map (
xp_awk_t* awk, xp_awk_nde_var_t* var, xp_awk_val_t* val);
static xp_awk_val_t* __eval_binary (xp_awk_t* awk, xp_awk_nde_t* nde);
static xp_awk_val_t* __eval_binop_lor (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right);
static xp_awk_val_t* __eval_binop_land (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right);
static xp_awk_val_t* __eval_binop_bor (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right);
static xp_awk_val_t* __eval_binop_bxor (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right);
static xp_awk_val_t* __eval_binop_band (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right);
static xp_awk_val_t* __eval_binop_eq (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right);
static xp_awk_val_t* __eval_binop_ne (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right);
static xp_awk_val_t* __eval_binop_gt (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right);
static xp_awk_val_t* __eval_binop_ge (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right);
static xp_awk_val_t* __eval_binop_lt (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right);
static xp_awk_val_t* __eval_binop_le (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right);
static xp_awk_val_t* __eval_binop_lshift (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right);
static xp_awk_val_t* __eval_binop_rshift (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right);
static xp_awk_val_t* __eval_binop_plus (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right);
static xp_awk_val_t* __eval_binop_minus (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right);
static xp_awk_val_t* __eval_binop_mul (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right);
static xp_awk_val_t* __eval_binop_div (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right);
static xp_awk_val_t* __eval_binop_mod (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right);
static xp_awk_val_t* __eval_binop_exp (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right);
static xp_awk_val_t* __eval_binop_ma (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right);
static xp_awk_val_t* __eval_binop_nm (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right);
static xp_awk_val_t* __eval_unary (xp_awk_t* awk, xp_awk_nde_t* nde);
static xp_awk_val_t* __eval_incpre (xp_awk_t* awk, xp_awk_nde_t* nde);
static xp_awk_val_t* __eval_incpst (xp_awk_t* awk, xp_awk_nde_t* nde);
static xp_awk_val_t* __eval_cnd (xp_awk_t* awk, xp_awk_nde_t* nde);
static xp_awk_val_t* __eval_call (xp_awk_t* awk, xp_awk_nde_t* nde);
static xp_awk_val_t* __eval_int (xp_awk_t* awk, xp_awk_nde_t* nde);
static xp_awk_val_t* __eval_real (xp_awk_t* awk, xp_awk_nde_t* nde);
static xp_awk_val_t* __eval_str (xp_awk_t* awk, xp_awk_nde_t* nde);
static xp_awk_val_t* __eval_named (xp_awk_t* awk, xp_awk_nde_t* nde);
static xp_awk_val_t* __eval_global (xp_awk_t* awk, xp_awk_nde_t* nde);
static xp_awk_val_t* __eval_local (xp_awk_t* awk, xp_awk_nde_t* nde);
static xp_awk_val_t* __eval_arg (xp_awk_t* awk, xp_awk_nde_t* nde);
static xp_awk_val_t* __eval_namedidx (xp_awk_t* awk, xp_awk_nde_t* nde);
static xp_awk_val_t* __eval_globalidx (xp_awk_t* awk, xp_awk_nde_t* nde);
static xp_awk_val_t* __eval_localidx (xp_awk_t* awk, xp_awk_nde_t* nde);
static xp_awk_val_t* __eval_argidx (xp_awk_t* awk, xp_awk_nde_t* nde);
static xp_awk_val_t* __eval_pos (xp_awk_t* awk, xp_awk_nde_t* nde);
static int __raw_push (xp_awk_t* awk, void* val);
static void __raw_pop (xp_awk_t* awk);
static void __raw_pop_times (xp_awk_t* awk, xp_size_t times);
static int __val_to_num (xp_awk_val_t* v, xp_long_t* l, xp_real_t* r);
static xp_char_t* __val_to_str (xp_awk_val_t* v, int* errnum);
typedef xp_awk_val_t* (*binop_func_t) (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right);
typedef xp_awk_val_t* (*eval_expr_t) (xp_awk_t* awk, xp_awk_nde_t* nde);
int __printval (xp_awk_pair_t* pair)
{
xp_printf (XP_TEXT("%s = "), (const xp_char_t*)pair->key);
xp_awk_printval ((xp_awk_val_t*)pair->val);
xp_printf (XP_TEXT("\n"));
return 0;
}
int xp_awk_run (xp_awk_t* awk)
{
xp_size_t nglobals, nargs, i;
xp_size_t saved_stack_top;
xp_awk_val_t* v;
int n = 0;
xp_assert (awk->run.stack_base == 0 && awk->run.stack_top == 0);
/* secure space for global variables */
saved_stack_top = awk->run.stack_top;
nglobals = awk->tree.nglobals;
while (nglobals > 0)
{
--nglobals;
if (__raw_push(awk,xp_awk_val_nil) == -1)
{
/* restore the stack_top with the saved value
* instead of calling __raw_pop as many times as
* the successful __raw_push. it is ok because
* the values pushed so fare are all xp_awk_val_nil */
awk->run.stack_top = saved_stack_top;
PANIC_I (awk, XP_AWK_ENOMEM);
}
}
if (awk->opt.run & XP_AWK_RUNMAIN)
{
static xp_char_t m_a_i_n[] =
{
XP_CHAR('m'),
XP_CHAR('a'),
XP_CHAR('i'),
XP_CHAR('n'),
XP_CHAR('\0')
};
static xp_awk_nde_call_t nde =
{
XP_AWK_NDE_CALL, /* type */
XP_NULL, /* next */
m_a_i_n, /* name */
XP_NULL /* args */
};
awk->run.exit_level = EXIT_NONE;
v = __eval_call(awk,(xp_awk_nde_t*)&nde);
if (v == XP_NULL) n = -1;
else
{
/* destroy the return value if necessary */
xp_awk_refupval (v);
xp_awk_refdownval (awk, v);
}
}
else
{
saved_stack_top = awk->run.stack_top;
if (__raw_push(awk,(void*)awk->run.stack_base) == -1)
{
/* restore the stack top in a cheesy(?) way */
awk->run.stack_top = saved_stack_top;
/* pops off global variables in a decent way */
__raw_pop_times (awk, awk->tree.nglobals);
PANIC_I (awk, XP_AWK_ENOMEM);
}
if (__raw_push(awk,(void*)saved_stack_top) == -1)
{
awk->run.stack_top = saved_stack_top;
__raw_pop_times (awk, awk->tree.nglobals);
PANIC_I (awk, XP_AWK_ENOMEM);
}
/* secure space for a return value */
if (__raw_push(awk,xp_awk_val_nil) == -1)
{
awk->run.stack_top = saved_stack_top;
__raw_pop_times (awk, awk->tree.nglobals);
PANIC_I (awk, XP_AWK_ENOMEM);
}
/* secure space for nargs */
if (__raw_push(awk,xp_awk_val_nil) == -1)
{
awk->run.stack_top = saved_stack_top;
__raw_pop_times (awk, awk->tree.nglobals);
PANIC_I (awk, XP_AWK_ENOMEM);
}
awk->run.stack_base = saved_stack_top;
/* set nargs to zero */
nargs = 0;
STACK_NARGS(awk) = (void*)nargs;
/* stack set up properly. ready to exeucte statement blocks */
if (n == 0 && awk->tree.begin != XP_NULL)
{
xp_assert (awk->tree.begin->type == XP_AWK_NDE_BLK);
awk->run.exit_level = EXIT_NONE;
if (__run_block (awk,
(xp_awk_nde_blk_t*)awk->tree.begin) == -1) n = -1;
}
while (awk->run.exit_level != EXIT_GLOBAL)
{
awk->run.exit_level = EXIT_NONE;
/*
* TODO: execute pattern blocks.
*/
break;
}
if (n == 0 && awk->tree.end != XP_NULL)
{
xp_assert (awk->tree.end->type == XP_AWK_NDE_BLK);
awk->run.exit_level = EXIT_NONE;
if (__run_block (awk,
(xp_awk_nde_blk_t*)awk->tree.end) == -1) n = -1;
}
/* restore stack */
nargs = (xp_size_t)STACK_NARGS(awk);
xp_assert (nargs == 0);
for (i = 0; i < nargs; i++)
{
xp_awk_refdownval (awk, STACK_ARG(awk,i));
}
v = STACK_RETVAL(awk);
xp_printf (XP_TEXT("Return Value - "));
xp_awk_printval (v);
xp_printf (XP_TEXT("\n"));
/* the life of the global return value is over here
* unlike the return value of each function */
/*xp_awk_refdownval_nofree (awk, v);*/
xp_awk_refdownval (awk, v);
awk->run.stack_top =
(xp_size_t)awk->run.stack[awk->run.stack_base+1];
awk->run.stack_base =
(xp_size_t)awk->run.stack[awk->run.stack_base+0];
}
/* pops off the global variables */
nglobals = awk->tree.nglobals;
while (nglobals > 0)
{
--nglobals;
xp_awk_refdownval (awk, STACK_GLOBAL(awk,nglobals));
__raw_pop (awk);
}
/* just reset the exit level */
awk->run.exit_level = EXIT_NONE;
xp_printf (XP_TEXT("-[VARIABLES]------------------------\n"));
xp_awk_map_walk (&awk->run.named, __printval);
xp_printf (XP_TEXT("-[END VARIABLES]--------------------------\n"));
return n;
}
static int __run_block (xp_awk_t* awk, xp_awk_nde_blk_t* nde)
{
xp_awk_nde_t* p;
xp_size_t nlocals;
xp_size_t saved_stack_top;
int n = 0;
xp_assert (nde->type == XP_AWK_NDE_BLK);
p = nde->body;
nlocals = nde->nlocals;
/*xp_printf (XP_TEXT("securing space for local variables nlocals = %d\n"), nlocals);*/
saved_stack_top = awk->run.stack_top;
/* secure space for local variables */
while (nlocals > 0)
{
--nlocals;
if (__raw_push(awk,xp_awk_val_nil) == -1)
{
/* restore stack top */
awk->run.stack_top = saved_stack_top;
return -1;
}
/* refupval is not required for xp_awk_val_nil */
}
/*xp_printf (XP_TEXT("executing block statements\n"));*/
while (p != XP_NULL && awk->run.exit_level == EXIT_NONE)
{
/*xp_printf (XP_TEXT("running a statement\n"));*/
if (__run_statement(awk,p) == -1)
{
n = -1;
break;
}
p = p->next;
}
/*xp_printf (XP_TEXT("popping off local variables\n"));*/
/* pop off local variables */
nlocals = nde->nlocals;
while (nlocals > 0)
{
--nlocals;
xp_awk_refdownval (awk, STACK_LOCAL(awk,nlocals));
__raw_pop (awk);
}
return n;
}
static int __run_statement (xp_awk_t* awk, xp_awk_nde_t* nde)
{
switch (nde->type)
{
case XP_AWK_NDE_NULL:
/* do nothing */
break;
case XP_AWK_NDE_BLK:
if (__run_block(awk,(xp_awk_nde_blk_t*)nde) == -1) return -1;
break;
case XP_AWK_NDE_IF:
if (__run_if_statement (
awk, (xp_awk_nde_if_t*)nde) == -1) return -1;
break;
case XP_AWK_NDE_WHILE:
case XP_AWK_NDE_DOWHILE:
if (__run_while_statement (
awk, (xp_awk_nde_while_t*)nde) == -1) return -1;
break;
case XP_AWK_NDE_FOR:
if (__run_for_statement (
awk, (xp_awk_nde_for_t*)nde) == -1) return -1;
break;
case XP_AWK_NDE_BREAK:
if (__run_break_statement(
awk, (xp_awk_nde_break_t*)nde) == -1) return -1;
break;
case XP_AWK_NDE_CONTINUE:
if (__run_continue_statement (
awk, (xp_awk_nde_continue_t*)nde) == -1) return -1;
break;
case XP_AWK_NDE_RETURN:
if (__run_return_statement (
awk, (xp_awk_nde_return_t*)nde) == -1) return -1;
break;
case XP_AWK_NDE_EXIT:
if (__run_exit_statement (
awk, (xp_awk_nde_exit_t*)nde) == -1) return -1;
break;
case XP_AWK_NDE_NEXT:
/* TODO: */
break;
case XP_AWK_NDE_NEXTFILE:
/* TODO: */
break;
default:
if (__eval_expression(awk,nde) == XP_NULL) return -1;
break;
}
return 0;
}
static int __run_if_statement (xp_awk_t* awk, xp_awk_nde_if_t* nde)
{
xp_awk_val_t* test;
int n = 0;
test = __eval_expression (awk, nde->test);
if (test == XP_NULL) return -1;
xp_awk_refupval (test);
if (xp_awk_boolval(test))
{
n = __run_statement (awk, nde->then_part);
}
else if (nde->else_part != XP_NULL)
{
n = __run_statement (awk, nde->else_part);
}
xp_awk_refdownval (awk, test); /* TODO: is this correct?*/
return n;
}
static int __run_while_statement (xp_awk_t* awk, xp_awk_nde_while_t* nde)
{
xp_awk_val_t* test;
if (nde->type == XP_AWK_NDE_WHILE)
{
/* TODO: handle run-time abortion... */
while (1)
{
test = __eval_expression (awk, nde->test);
if (test == XP_NULL) return -1;
xp_awk_refupval (test);
if (xp_awk_boolval(test))
{
if (__run_statement(awk,nde->body) == -1)
{
xp_awk_refdownval (awk, test);
return -1;
}
}
else
{
xp_awk_refdownval (awk, test);
break;
}
xp_awk_refdownval (awk, test);
if (awk->run.exit_level == EXIT_BREAK)
{
awk->run.exit_level = EXIT_NONE;
break;
}
else if (awk->run.exit_level == EXIT_CONTINUE)
{
awk->run.exit_level = EXIT_NONE;
}
else if (awk->run.exit_level != EXIT_NONE) break;
}
}
else if (nde->type == XP_AWK_NDE_DOWHILE)
{
/* TODO: handle run-time abortion... */
do
{
if (__run_statement(awk,nde->body) == -1) return -1;
if (awk->run.exit_level == EXIT_BREAK)
{
awk->run.exit_level = EXIT_NONE;
break;
}
else if (awk->run.exit_level == EXIT_CONTINUE)
{
awk->run.exit_level = EXIT_NONE;
}
else if (awk->run.exit_level != EXIT_NONE) break;
test = __eval_expression (awk, nde->test);
if (test == XP_NULL) return -1;
xp_awk_refupval (test);
if (!xp_awk_boolval(test))
{
xp_awk_refdownval (awk, test);
break;
}
xp_awk_refdownval (awk, test);
}
while (1);
}
return 0;
}
static int __run_for_statement (xp_awk_t* awk, xp_awk_nde_for_t* nde)
{
xp_awk_val_t* val;
if (nde->init != XP_NULL)
{
val = __eval_expression(awk,nde->init);
if (val == XP_NULL) return -1;
xp_awk_refupval (val);
xp_awk_refdownval (awk, val);
}
while (1)
{
if (nde->test != XP_NULL)
{
xp_awk_val_t* test;
test = __eval_expression (awk, nde->test);
if (test == XP_NULL) return -1;
xp_awk_refupval (test);
if (xp_awk_boolval(test))
{
if (__run_statement(awk,nde->body) == -1)
{
xp_awk_refdownval (awk, test);
return -1;
}
}
else
{
xp_awk_refdownval (awk, test);
break;
}
xp_awk_refdownval (awk, test);
}
else
{
if (__run_statement(awk,nde->body) == -1)
{
return -1;
}
}
if (awk->run.exit_level == EXIT_BREAK)
{
awk->run.exit_level = EXIT_NONE;
break;
}
else if (awk->run.exit_level == EXIT_CONTINUE)
{
awk->run.exit_level = EXIT_NONE;
}
else if (awk->run.exit_level != EXIT_NONE) break;
if (nde->incr != XP_NULL)
{
val = __eval_expression(awk,nde->incr);
if (val == XP_NULL) return -1;
xp_awk_refupval (val);
xp_awk_refdownval (awk, val);
}
}
return 0;
}
static int __run_break_statement (xp_awk_t* awk, xp_awk_nde_break_t* nde)
{
awk->run.exit_level = EXIT_BREAK;
return 0;
}
static int __run_continue_statement (xp_awk_t* awk, xp_awk_nde_continue_t* nde)
{
awk->run.exit_level = EXIT_CONTINUE;
return 0;
}
static int __run_return_statement (xp_awk_t* awk, xp_awk_nde_return_t* nde)
{
if (nde->val != XP_NULL)
{
xp_awk_val_t* val;
/*xp_printf (XP_TEXT("returning....\n"));*/
val = __eval_expression(awk, nde->val);
if (val == XP_NULL) return -1;
xp_awk_refdownval (awk, STACK_RETVAL(awk));
STACK_RETVAL(awk) = val;
xp_awk_refupval (val); /* see __eval_call for the trick */
/*xp_printf (XP_TEXT("set return value....\n"));*/
}
awk->run.exit_level = EXIT_FUNCTION;
return 0;
}
static int __run_exit_statement (xp_awk_t* awk, xp_awk_nde_exit_t* nde)
{
if (nde->val != XP_NULL)
{
xp_awk_val_t* val;
val = __eval_expression(awk, nde->val);
if (val == XP_NULL) return -1;
xp_awk_refdownval (awk, STACK_RETVAL_GLOBAL(awk));
STACK_RETVAL_GLOBAL(awk) = val; /* global return value */
xp_awk_refupval (val);
}
awk->run.exit_level = EXIT_GLOBAL;
return 0;
}
static xp_awk_val_t* __eval_expression (xp_awk_t* awk, xp_awk_nde_t* nde)
{
static eval_expr_t __eval_func[] =
{
/* the order of functions here should match the order
* of node types declared in tree.h */
__eval_assignment,
__eval_binary,
__eval_unary,
__eval_incpre,
__eval_incpst,
__eval_cnd,
__eval_call,
__eval_int,
__eval_real,
__eval_str,
__eval_named,
__eval_global,
__eval_local,
__eval_arg,
__eval_namedidx,
__eval_globalidx,
__eval_localidx,
__eval_argidx,
__eval_pos
};
xp_assert (nde->type >= XP_AWK_NDE_ASS &&
(nde->type - XP_AWK_NDE_ASS) < xp_countof(__eval_func));
return __eval_func[nde->type-XP_AWK_NDE_ASS] (awk, nde);
}
static xp_awk_val_t* __eval_assignment (xp_awk_t* awk, xp_awk_nde_t* nde)
{
xp_awk_val_t* val, * res;
xp_awk_nde_ass_t* ass = (xp_awk_nde_ass_t*)nde;
xp_assert (ass->left != XP_NULL && ass->right != XP_NULL);
val = __eval_expression(awk, ass->right);
if (val == XP_NULL) return XP_NULL;
xp_awk_refupval (val);
if (ass->opcode != XP_AWK_ASSOP_NONE)
{
xp_awk_val_t* val2, * tmp;
val2 = __eval_expression (awk, ass->left);
if (val2 == XP_NULL)
{
xp_awk_refdownval (awk, val);
return XP_NULL;
}
xp_awk_refupval (val2);
if (ass->opcode == XP_AWK_ASSOP_PLUS)
{
tmp = __eval_binop_plus (awk, val2, val);
}
else if (ass->opcode == XP_AWK_ASSOP_MINUS)
{
tmp = __eval_binop_minus (awk, val2, val);
}
else if (ass->opcode == XP_AWK_ASSOP_MUL)
{
tmp = __eval_binop_mul (awk, val2, val);
}
else if (ass->opcode == XP_AWK_ASSOP_DIV)
{
tmp = __eval_binop_div (awk, val2, val);
}
else if (ass->opcode == XP_AWK_ASSOP_MOD)
{
tmp = __eval_binop_mod (awk, val2, val);
}
else if (ass->opcode == XP_AWK_ASSOP_EXP)
{
tmp = __eval_binop_exp (awk, val2, val);
}
else
{
xp_assert (!"should never happen - invalid assignment opcode");
PANIC (awk, XP_AWK_EINTERNAL);
}
if (tmp == XP_NULL)
{
xp_awk_refdownval (awk, val);
xp_awk_refdownval (awk, val2);
return XP_NULL;
}
xp_awk_refdownval (awk, val);
val = tmp;
xp_awk_refupval (val);
}
res = __do_assignment (awk, (xp_awk_nde_var_t*)ass->left, val);
xp_awk_refdownval (awk, val);
return res;
}
static xp_awk_val_t* __do_assignment (
xp_awk_t* awk, xp_awk_nde_var_t* var, xp_awk_val_t* val)
{
if (val->type == XP_AWK_VAL_MAP)
{
/* a map cannot be assigned to a variable */
PANIC (awk, XP_AWK_ENOTASSIGNABLE);
}
if (var->type == XP_AWK_NDE_NAMED)
{
int n;
/* TODO: need to check if the old value is a map?? prevent the assignment? */
n = xp_awk_map_putx (
&awk->run.named, var->id.name, val, XP_NULL);
if (n < 0) PANIC (awk, XP_AWK_ENOMEM);
xp_awk_refupval (val);
}
else if (var->type == XP_AWK_NDE_GLOBAL)
{
/* TODO: need to check if the old value is a map?? prevent the assignment? */
xp_awk_refdownval (awk, STACK_GLOBAL(awk,var->id.idxa));
STACK_GLOBAL(awk,var->id.idxa) = val;
xp_awk_refupval (val);
}
else if (var->type == XP_AWK_NDE_LOCAL)
{
/* TODO: need to check if the old value is a map?? prevent the assignment? */
xp_awk_refdownval (awk, STACK_LOCAL(awk,var->id.idxa));
STACK_LOCAL(awk,var->id.idxa) = val;
xp_awk_refupval (val);
}
else if (var->type == XP_AWK_NDE_ARG)
{
/* TODO: need to check if the old value is a map?? prevent the assignment? */
xp_awk_refdownval (awk, STACK_ARG(awk,var->id.idxa));
STACK_ARG(awk,var->id.idxa) = val;
xp_awk_refupval (val);
}
else if (var->type == XP_AWK_NDE_NAMEDIDX ||
var->type == XP_AWK_NDE_GLOBALIDX ||
var->type == XP_AWK_NDE_LOCALIDX ||
var->type == XP_AWK_NDE_ARGIDX)
{
if (__do_assignment_map(awk,var,val) == XP_NULL)
return XP_NULL;
}
else if (var->type == XP_AWK_NDE_POS)
{
/* TODO: */
xp_printf (XP_TEXT("XP_AWK_NDE_POS not implemented\n"));
PANIC (awk, XP_AWK_EINTERNAL);
}
else
{
xp_assert (!"should never happen - invalid variable type");
PANIC (awk, XP_AWK_EINTERNAL);
}
return val;
}
static xp_awk_val_t* __do_assignment_map (
xp_awk_t* awk, xp_awk_nde_var_t* var, xp_awk_val_t* val)
{
xp_awk_val_map_t* map;
xp_awk_nde_t* nde;
xp_char_t* str;
int n;
xp_assert (
(var->type == XP_AWK_NDE_NAMEDIDX ||
var->type == XP_AWK_NDE_GLOBALIDX ||
var->type == XP_AWK_NDE_LOCALIDX ||
var->type == XP_AWK_NDE_ARGIDX) && var->idx != XP_NULL);
if (var->type == XP_AWK_NDE_NAMEDIDX)
{
xp_awk_pair_t* pair;
pair = xp_awk_map_get (&awk->run.named, var->id.name);
map = (pair == XP_NULL)? xp_awk_val_nil: pair->val;
}
else
{
map = (var->type == XP_AWK_NDE_GLOBALIDX)?
(xp_awk_val_map_t*)STACK_GLOBAL(awk,var->id.idxa):
(var->type == XP_AWK_NDE_LOCALIDX)?
(xp_awk_val_map_t*)STACK_LOCAL(awk,var->id.idxa):
(xp_awk_val_map_t*)STACK_ARG(awk,var->id.idxa);
}
if (map->type == XP_AWK_VAL_NIL)
{
/* the map is not initialized yet */
xp_awk_val_t* tmp;
tmp = xp_awk_makemapval (awk);
if (tmp == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
if (var->type == XP_AWK_NDE_NAMEDIDX)
{
/* doesn't have to decrease the reference count
* of the previous value here as it is done by
* xp_awk_map_put */
if (xp_awk_map_put (
&awk->run.named, var->id.name, tmp) == XP_NULL)
{
xp_awk_refupval (tmp);
xp_awk_refdownval (awk, tmp);
PANIC (awk, XP_AWK_ENOMEM);
}
}
else if (var->type == XP_AWK_NDE_GLOBALIDX)
{
/* decrease the reference count of the previous value.
* in fact, this is not necessary as map is always
* xp_awk_val_nil here. */
xp_awk_refdownval (awk, (xp_awk_val_t*)map);
STACK_GLOBAL(awk,var->id.idxa) = tmp;
}
else if (var->type == XP_AWK_NDE_LOCALIDX)
{
xp_awk_refdownval (awk, (xp_awk_val_t*)map);
STACK_LOCAL(awk,var->id.idxa) = tmp;
}
else
{
xp_awk_refdownval (awk, (xp_awk_val_t*)map);
STACK_ARG(awk,var->id.idxa) = tmp;
}
xp_awk_refupval (tmp);
map = (xp_awk_val_map_t*) tmp;
}
else if (map->type != XP_AWK_VAL_MAP)
{
PANIC (awk, XP_AWK_ENOTINDEXABLE);
}
/* compose a map index */
nde = var->idx;
/* TODO: while (nde != XP_NULL) */
{
xp_awk_val_t* tmp;
int errnum;
tmp = __eval_expression (awk, nde);
if (tmp == XP_NULL)
{
/* TODO: clearing previous idx values... */
return XP_NULL;
}
xp_awk_refupval (tmp);
str = __val_to_str (tmp, &errnum);
if (str == XP_NULL)
{
xp_awk_refdownval (awk, tmp);
PANIC (awk, errnum);
}
xp_awk_refdownval (awk, tmp);
/* TODO: nde = nde->next; */
}
/*
xp_printf (XP_TEXT("**** index str=>%s, map->ref=%d, map->type=%d\n"), str, map->ref, map->type);
*/
n = xp_awk_map_putx (map->map, str, val, XP_NULL);
if (n < 0)
{
xp_free (str);
PANIC (awk, XP_AWK_ENOMEM);
}
xp_free (str);
xp_awk_refupval (val);
return val;
}
static xp_awk_val_t* __eval_binary (xp_awk_t* awk, xp_awk_nde_t* nde)
{
static binop_func_t __binop_func[] =
{
__eval_binop_lor,
__eval_binop_land,
__eval_binop_bor,
__eval_binop_bxor,
__eval_binop_band,
__eval_binop_eq,
__eval_binop_ne,
__eval_binop_gt,
__eval_binop_ge,
__eval_binop_lt,
__eval_binop_le,
__eval_binop_lshift,
__eval_binop_rshift,
__eval_binop_plus,
__eval_binop_minus,
__eval_binop_mul,
__eval_binop_div,
__eval_binop_mod,
__eval_binop_exp,
__eval_binop_ma,
__eval_binop_nm
};
xp_awk_nde_exp_t* exp = (xp_awk_nde_exp_t*)nde;
xp_awk_val_t* left, * right, * res;
xp_assert (exp->type == XP_AWK_NDE_EXP_BIN);
left = __eval_expression (awk, exp->left);
if (left == XP_NULL) return XP_NULL;
xp_awk_refupval (left);
right = __eval_expression (awk, exp->right);
if (right == XP_NULL)
{
xp_awk_refdownval (awk, left);
return XP_NULL;
}
xp_awk_refupval (right);
xp_assert (exp->opcode >= 0 &&
exp->opcode < xp_countof(__binop_func));
res = __binop_func[exp->opcode] (awk, left, right);
xp_awk_refdownval (awk, left);
xp_awk_refdownval (awk, right);
return res;
}
static xp_awk_val_t* __eval_binop_lor (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
{
xp_awk_val_t* res = XP_NULL;
res = xp_awk_makeintval (awk,
xp_awk_boolval(left) || xp_awk_boolval(right));
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
return res;
}
static xp_awk_val_t* __eval_binop_land (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
{
xp_awk_val_t* res = XP_NULL;
res = xp_awk_makeintval (awk,
xp_awk_boolval(left) && xp_awk_boolval(right));
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
return res;
}
static xp_awk_val_t* __eval_binop_bor (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
{
xp_awk_val_t* res = XP_NULL;
if (left->type == XP_AWK_VAL_INT &&
right->type == XP_AWK_VAL_INT)
{
xp_long_t r =
((xp_awk_val_int_t*)left)->val |
((xp_awk_val_int_t*)right)->val;
res = xp_awk_makeintval (awk, r);
}
else
{
PANIC (awk, XP_AWK_EOPERAND);
}
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
return res;
}
static xp_awk_val_t* __eval_binop_bxor (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
{
xp_awk_val_t* res = XP_NULL;
if (left->type == XP_AWK_VAL_INT &&
right->type == XP_AWK_VAL_INT)
{
xp_long_t r =
((xp_awk_val_int_t*)left)->val ^
((xp_awk_val_int_t*)right)->val;
res = xp_awk_makeintval (awk, r);
}
else
{
PANIC (awk, XP_AWK_EOPERAND);
}
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
return res;
}
static xp_awk_val_t* __eval_binop_band (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
{
xp_awk_val_t* res = XP_NULL;
if (left->type == XP_AWK_VAL_INT &&
right->type == XP_AWK_VAL_INT)
{
xp_long_t r =
((xp_awk_val_int_t*)left)->val &
((xp_awk_val_int_t*)right)->val;
res = xp_awk_makeintval (awk, r);
}
else
{
PANIC (awk, XP_AWK_EOPERAND);
}
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
return res;
}
static xp_awk_val_t* __eval_binop_eq (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
{
xp_awk_val_t* res = XP_NULL;
xp_long_t r = 0;
if (left->type == XP_AWK_VAL_NIL ||
right->type == XP_AWK_VAL_NIL)
{
r = (left->type == right->type);
}
else if (left->type == XP_AWK_VAL_INT &&
right->type == XP_AWK_VAL_INT)
{
r = ((xp_awk_val_int_t*)left)->val ==
((xp_awk_val_int_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_REAL &&
right->type == XP_AWK_VAL_REAL)
{
r = ((xp_awk_val_real_t*)left)->val ==
((xp_awk_val_real_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_INT &&
right->type == XP_AWK_VAL_REAL)
{
r = ((xp_awk_val_int_t*)left)->val ==
((xp_awk_val_real_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_REAL &&
right->type == XP_AWK_VAL_INT)
{
r = ((xp_awk_val_real_t*)left)->val ==
((xp_awk_val_int_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_STR &&
right->type == XP_AWK_VAL_STR)
{
r = xp_strxncmp (
((xp_awk_val_str_t*)left)->buf,
((xp_awk_val_str_t*)left)->len,
((xp_awk_val_str_t*)right)->buf,
((xp_awk_val_str_t*)right)->len) == 0;
}
else
{
PANIC (awk, XP_AWK_EOPERAND);
}
res = xp_awk_makeintval (awk, r);
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
return res;
}
static xp_awk_val_t* __eval_binop_ne (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
{
xp_awk_val_t* res = XP_NULL;
xp_long_t r = 0;
if (left->type == XP_AWK_VAL_NIL ||
right->type == XP_AWK_VAL_NIL)
{
r = (left->type != right->type);
}
else if (left->type == XP_AWK_VAL_INT &&
right->type == XP_AWK_VAL_INT)
{
r = ((xp_awk_val_int_t*)left)->val !=
((xp_awk_val_int_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_REAL &&
right->type == XP_AWK_VAL_REAL)
{
r = ((xp_awk_val_real_t*)left)->val !=
((xp_awk_val_real_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_INT &&
right->type == XP_AWK_VAL_REAL)
{
r = ((xp_awk_val_int_t*)left)->val !=
((xp_awk_val_real_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_REAL &&
right->type == XP_AWK_VAL_INT)
{
r = ((xp_awk_val_real_t*)left)->val !=
((xp_awk_val_int_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_STR &&
right->type == XP_AWK_VAL_STR)
{
r = xp_strxncmp (
((xp_awk_val_str_t*)left)->buf,
((xp_awk_val_str_t*)left)->len,
((xp_awk_val_str_t*)right)->buf,
((xp_awk_val_str_t*)right)->len) != 0;
}
else
{
PANIC (awk, XP_AWK_EOPERAND);
}
res = xp_awk_makeintval (awk, r);
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
return res;
}
static xp_awk_val_t* __eval_binop_gt (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
{
xp_awk_val_t* res = XP_NULL;
xp_long_t r = 0;
if (left->type == XP_AWK_VAL_INT &&
right->type == XP_AWK_VAL_INT)
{
r = ((xp_awk_val_int_t*)left)->val >
((xp_awk_val_int_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_REAL &&
right->type == XP_AWK_VAL_REAL)
{
r = ((xp_awk_val_real_t*)left)->val >
((xp_awk_val_real_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_INT &&
right->type == XP_AWK_VAL_REAL)
{
r = ((xp_awk_val_int_t*)left)->val >
((xp_awk_val_real_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_REAL &&
right->type == XP_AWK_VAL_INT)
{
r = ((xp_awk_val_real_t*)left)->val >
((xp_awk_val_int_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_STR &&
right->type == XP_AWK_VAL_STR)
{
r = xp_strxncmp (
((xp_awk_val_str_t*)left)->buf,
((xp_awk_val_str_t*)left)->len,
((xp_awk_val_str_t*)right)->buf,
((xp_awk_val_str_t*)right)->len) > 0;
}
else
{
PANIC (awk, XP_AWK_EOPERAND);
}
res = xp_awk_makeintval (awk, r);
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
return res;
}
static xp_awk_val_t* __eval_binop_ge (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
{
xp_awk_val_t* res = XP_NULL;
xp_long_t r = 0;
if (left->type == XP_AWK_VAL_INT &&
right->type == XP_AWK_VAL_INT)
{
r = ((xp_awk_val_int_t*)left)->val >=
((xp_awk_val_int_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_REAL &&
right->type == XP_AWK_VAL_REAL)
{
r = ((xp_awk_val_real_t*)left)->val >=
((xp_awk_val_real_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_INT &&
right->type == XP_AWK_VAL_REAL)
{
r = ((xp_awk_val_int_t*)left)->val >=
((xp_awk_val_real_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_REAL &&
right->type == XP_AWK_VAL_INT)
{
r = ((xp_awk_val_real_t*)left)->val >=
((xp_awk_val_int_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_STR &&
right->type == XP_AWK_VAL_STR)
{
r = xp_strxncmp (
((xp_awk_val_str_t*)left)->buf,
((xp_awk_val_str_t*)left)->len,
((xp_awk_val_str_t*)right)->buf,
((xp_awk_val_str_t*)right)->len) >= 0;
}
else
{
PANIC (awk, XP_AWK_EOPERAND);
}
res = xp_awk_makeintval (awk, r);
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
return res;
}
static xp_awk_val_t* __eval_binop_lt (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
{
xp_awk_val_t* res = XP_NULL;
xp_long_t r = 0;
if (left->type == XP_AWK_VAL_INT &&
right->type == XP_AWK_VAL_INT)
{
r = ((xp_awk_val_int_t*)left)->val <
((xp_awk_val_int_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_REAL &&
right->type == XP_AWK_VAL_REAL)
{
r = ((xp_awk_val_real_t*)left)->val <
((xp_awk_val_real_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_INT &&
right->type == XP_AWK_VAL_REAL)
{
r = ((xp_awk_val_int_t*)left)->val <
((xp_awk_val_real_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_REAL &&
right->type == XP_AWK_VAL_INT)
{
r = ((xp_awk_val_real_t*)left)->val <
((xp_awk_val_int_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_STR &&
right->type == XP_AWK_VAL_STR)
{
r = xp_strxncmp (
((xp_awk_val_str_t*)left)->buf,
((xp_awk_val_str_t*)left)->len,
((xp_awk_val_str_t*)right)->buf,
((xp_awk_val_str_t*)right)->len) < 0;
}
else
{
PANIC (awk, XP_AWK_EOPERAND);
}
res = xp_awk_makeintval (awk, r);
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
return res;
}
static xp_awk_val_t* __eval_binop_le (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
{
xp_awk_val_t* res = XP_NULL;
xp_long_t r = 0;
if (left->type == XP_AWK_VAL_INT &&
right->type == XP_AWK_VAL_INT)
{
r = ((xp_awk_val_int_t*)left)->val <=
((xp_awk_val_int_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_REAL &&
right->type == XP_AWK_VAL_REAL)
{
r = ((xp_awk_val_real_t*)left)->val <=
((xp_awk_val_real_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_INT &&
right->type == XP_AWK_VAL_REAL)
{
r = ((xp_awk_val_int_t*)left)->val <=
((xp_awk_val_real_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_REAL &&
right->type == XP_AWK_VAL_INT)
{
r = ((xp_awk_val_real_t*)left)->val <=
((xp_awk_val_int_t*)right)->val;
}
else if (left->type == XP_AWK_VAL_STR &&
right->type == XP_AWK_VAL_STR)
{
r = xp_strxncmp (
((xp_awk_val_str_t*)left)->buf,
((xp_awk_val_str_t*)left)->len,
((xp_awk_val_str_t*)right)->buf,
((xp_awk_val_str_t*)right)->len) <= 0;
}
else
{
PANIC (awk, XP_AWK_EOPERAND);
}
res = xp_awk_makeintval (awk, r);
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
return res;
}
static xp_awk_val_t* __eval_binop_lshift (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
{
int n1, n2, n3;
xp_long_t l1, l2;
xp_real_t r1, r2;
xp_awk_val_t* res;
n1 = __val_to_num (left, &l1, &r1);
n2 = __val_to_num (right, &l2, &r2);
if (n1 == -1 || n2 == -1) PANIC (awk, XP_AWK_EOPERAND);
n3 = n1 + (n2 << 1);
if (n3 == 0)
{
if (l2 == 0) PANIC (awk, XP_AWK_EDIVBYZERO);
res = xp_awk_makeintval (awk, (xp_long_t)l1 << (xp_long_t)l2);
}
else PANIC (awk, XP_AWK_EOPERAND);
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
return res;
}
static xp_awk_val_t* __eval_binop_rshift (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
{
int n1, n2, n3;
xp_long_t l1, l2;
xp_real_t r1, r2;
xp_awk_val_t* res;
n1 = __val_to_num (left, &l1, &r1);
n2 = __val_to_num (right, &l2, &r2);
if (n1 == -1 || n2 == -1) PANIC (awk, XP_AWK_EOPERAND);
n3 = n1 + (n2 << 1);
if (n3 == 0)
{
if (l2 == 0) PANIC (awk, XP_AWK_EDIVBYZERO);
res = xp_awk_makeintval (awk, (xp_long_t)l1 >> (xp_long_t)l2);
}
else PANIC (awk, XP_AWK_EOPERAND);
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
return res;
}
static xp_awk_val_t* __eval_binop_plus (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
{
int n1, n2, n3;
xp_long_t l1, l2;
xp_real_t r1, r2;
xp_awk_val_t* res;
n1 = __val_to_num (left, &l1, &r1);
n2 = __val_to_num (right, &l2, &r2);
if (n1 == -1 || n2 == -1) PANIC (awk, XP_AWK_EOPERAND);
/*
n1 n2 n3
0 0 = 0
1 0 = 1
0 1 = 2
1 1 = 3
*/
n3 = n1 + (n2 << 1);
xp_assert (n3 >= 0 && n3 <= 3);
res = (n3 == 0)? xp_awk_makeintval(awk,(xp_long_t)l1+(xp_long_t)l2):
(n3 == 1)? xp_awk_makerealval(awk,(xp_real_t)r1+(xp_real_t)l2):
(n3 == 2)? xp_awk_makerealval(awk,(xp_real_t)l1+(xp_real_t)r2):
xp_awk_makerealval(awk,(xp_real_t)r1+(xp_real_t)r2);
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
return res;
}
static xp_awk_val_t* __eval_binop_minus (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
{
int n1, n2, n3;
xp_long_t l1, l2;
xp_real_t r1, r2;
xp_awk_val_t* res;
n1 = __val_to_num (left, &l1, &r1);
n2 = __val_to_num (right, &l2, &r2);
if (n1 == -1 || n2 == -1) PANIC (awk, XP_AWK_EOPERAND);
n3 = n1 + (n2 << 1);
xp_assert (n3 >= 0 && n3 <= 3);
res = (n3 == 0)? xp_awk_makeintval(awk,(xp_long_t)l1-(xp_long_t)l2):
(n3 == 1)? xp_awk_makerealval(awk,(xp_real_t)r1-(xp_real_t)l2):
(n3 == 2)? xp_awk_makerealval(awk,(xp_real_t)l1-(xp_real_t)r2):
xp_awk_makerealval(awk,(xp_real_t)r1-(xp_real_t)r2);
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
return res;
}
static xp_awk_val_t* __eval_binop_mul (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
{
int n1, n2, n3;
xp_long_t l1, l2;
xp_real_t r1, r2;
xp_awk_val_t* res;
n1 = __val_to_num (left, &l1, &r1);
n2 = __val_to_num (right, &l2, &r2);
if (n1 == -1 || n2 == -1) PANIC (awk, XP_AWK_EOPERAND);
n3 = n1 + (n2 << 1);
xp_assert (n3 >= 0 && n3 <= 3);
res = (n3 == 0)? xp_awk_makeintval(awk,(xp_long_t)l1*(xp_long_t)l2):
(n3 == 1)? xp_awk_makerealval(awk,(xp_real_t)r1*(xp_real_t)l2):
(n3 == 2)? xp_awk_makerealval(awk,(xp_real_t)l1*(xp_real_t)r2):
xp_awk_makerealval(awk,(xp_real_t)r1*(xp_real_t)r2);
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
return res;
}
static xp_awk_val_t* __eval_binop_div (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
{
int n1, n2, n3;
xp_long_t l1, l2;
xp_real_t r1, r2;
xp_awk_val_t* res;
n1 = __val_to_num (left, &l1, &r1);
n2 = __val_to_num (right, &l2, &r2);
if (n1 == -1 || n2 == -1) PANIC (awk, XP_AWK_EOPERAND);
n3 = n1 + (n2 << 1);
if (n3 == 0)
{
if (l2 == 0) PANIC (awk, XP_AWK_EDIVBYZERO);
res = xp_awk_makeintval (awk, (xp_long_t)l1 / (xp_long_t)l2);
}
else if (n3 == 1)
{
res = xp_awk_makerealval (awk, (xp_real_t)r1 / (xp_real_t)l2);
}
else if (n3 == 2)
{
res = xp_awk_makerealval (awk, (xp_real_t)l1 / (xp_real_t)r2);
}
else
{
xp_assert (n3 == 3);
res = xp_awk_makerealval (awk, (xp_real_t)r1 / (xp_real_t)r2);
}
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
return res;
}
static xp_awk_val_t* __eval_binop_mod (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
{
int n1, n2, n3;
xp_long_t l1, l2;
xp_real_t r1, r2;
xp_awk_val_t* res;
n1 = __val_to_num (left, &l1, &r1);
n2 = __val_to_num (right, &l2, &r2);
if (n1 == -1 || n2 == -1) PANIC (awk, XP_AWK_EOPERAND);
n3 = n1 + (n2 << 1);
if (n3 == 0)
{
if (l2 == 0) PANIC (awk, XP_AWK_EDIVBYZERO);
res = xp_awk_makeintval (awk, (xp_long_t)l1 % (xp_long_t)l2);
}
else PANIC (awk, XP_AWK_EOPERAND);
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
return res;
}
static xp_awk_val_t* __eval_binop_exp (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
{
int n1, n2, n3;
xp_long_t l1, l2;
xp_real_t r1, r2;
xp_awk_val_t* res;
n1 = __val_to_num (left, &l1, &r1);
n2 = __val_to_num (right, &l2, &r2);
if (n1 == -1 || n2 == -1) PANIC (awk, XP_AWK_EOPERAND);
n3 = n1 + (n2 << 1);
if (n3 == 0)
{
xp_long_t v = 1;
while (l2-- > 0) v *= l1;
res = xp_awk_makeintval (awk, v);
}
else if (n3 == 1)
{
/*res = xp_awk_makerealval (
awk, pow((xp_real_t)r1,(xp_real_t)l2));*/
xp_real_t v = 1.0;
while (l2-- > 0) v *= r1;
res = xp_awk_makerealval (awk, v);
}
else if (n3 == 2)
{
res = xp_awk_makerealval (
awk, pow((xp_real_t)l1,(xp_real_t)r2));
}
else
{
xp_assert (n3 == 3);
res = xp_awk_makerealval (
awk, pow((xp_real_t)r1,(xp_real_t)r2));
}
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
return res;
}
static xp_awk_val_t* __eval_binop_ma (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
{
/* TODO: ... */
PANIC (awk, XP_AWK_EINTERNAL);
return XP_NULL;
}
static xp_awk_val_t* __eval_binop_nm (
xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
{
/* TODO: ... */
PANIC (awk, XP_AWK_EINTERNAL);
return XP_NULL;
}
static xp_awk_val_t* __eval_unary (xp_awk_t* awk, xp_awk_nde_t* nde)
{
xp_awk_val_t* left, * res = XP_NULL;
xp_awk_nde_exp_t* exp = (xp_awk_nde_exp_t*)nde;
xp_assert (exp->type == XP_AWK_NDE_EXP_UNR);
xp_assert (exp->left != XP_NULL && exp->right == XP_NULL);
left = __eval_expression (awk, exp->left);
if (left == XP_NULL) return XP_NULL;
xp_awk_refupval (left);
if (exp->opcode == XP_AWK_UNROP_PLUS)
{
if (left->type == XP_AWK_VAL_INT)
{
xp_long_t r = ((xp_awk_val_int_t*)left)->val;
res = xp_awk_makeintval (awk, r);
}
else if (left->type == XP_AWK_VAL_REAL)
{
xp_real_t r = ((xp_awk_val_real_t*)left)->val;
res = xp_awk_makerealval (awk, r);
}
else
{
xp_awk_refdownval (awk, left);
PANIC (awk, XP_AWK_EOPERAND);
}
}
else if (exp->opcode == XP_AWK_UNROP_MINUS)
{
if (left->type == XP_AWK_VAL_INT)
{
xp_long_t r = ((xp_awk_val_int_t*)left)->val;
res = xp_awk_makeintval (awk, -r);
}
else if (left->type == XP_AWK_VAL_REAL)
{
xp_real_t r = ((xp_awk_val_real_t*)left)->val;
res = xp_awk_makerealval (awk, -r);
}
else
{
xp_awk_refdownval (awk, left);
PANIC (awk, XP_AWK_EOPERAND);
}
}
else if (exp->opcode == XP_AWK_UNROP_NOT)
{
if (left->type == XP_AWK_VAL_INT)
{
xp_long_t r = ((xp_awk_val_int_t*)left)->val;
res = xp_awk_makeintval (awk, !r);
}
else if (left->type == XP_AWK_VAL_REAL)
{
xp_real_t r = ((xp_awk_val_real_t*)left)->val;
res = xp_awk_makerealval (awk, !r);
}
else
{
xp_awk_refdownval (awk, left);
PANIC (awk, XP_AWK_EOPERAND);
}
}
else if (exp->opcode == XP_AWK_UNROP_BNOT)
{
if (left->type == XP_AWK_VAL_INT)
{
xp_long_t r = ((xp_awk_val_int_t*)left)->val;
res = xp_awk_makeintval (awk, ~r);
}
else
{
xp_awk_refdownval (awk, left);
PANIC (awk, XP_AWK_EOPERAND);
}
}
if (res == XP_NULL)
{
xp_awk_refdownval (awk, left);
PANIC (awk, XP_AWK_ENOMEM);
}
xp_awk_refdownval (awk, left);
return res;
}
static xp_awk_val_t* __eval_incpre (xp_awk_t* awk, xp_awk_nde_t* nde)
{
xp_awk_val_t* left, * res;
xp_awk_nde_exp_t* exp = (xp_awk_nde_exp_t*)nde;
xp_assert (exp->type == XP_AWK_NDE_EXP_INCPRE);
xp_assert (exp->left != XP_NULL && exp->right == XP_NULL);
/* ugly. but let's keep going this way for the time being */
/*if (exp->left->type != XP_AWK_NDE_NAMED &&
exp->left->type != XP_AWK_NDE_GLOBAL &&
exp->left->type != XP_AWK_NDE_LOCAL &&
exp->left->type != XP_AWK_NDE_ARG &&
exp->left->type != XP_AWK_NDE_NAMEDIDX &&
exp->left->type != XP_AWK_NDE_GLOBALIDX &&
exp->left->type != XP_AWK_NDE_LOCALIDX &&
exp->left->type != XP_AWK_NDE_ARGIDX) */
if (exp->left->type < XP_AWK_NDE_NAMED ||
exp->left->type > XP_AWK_NDE_ARGIDX)
{
PANIC (awk, XP_AWK_EOPERAND);
}
left = __eval_expression (awk, exp->left);
if (left == XP_NULL) return XP_NULL;
xp_awk_refupval (left);
if (exp->opcode == XP_AWK_INCOP_PLUS)
{
if (left->type == XP_AWK_VAL_INT)
{
xp_long_t r = ((xp_awk_val_int_t*)left)->val;
res = xp_awk_makeintval (awk, r + 1);
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
}
else if (left->type == XP_AWK_VAL_REAL)
{
xp_real_t r = ((xp_awk_val_real_t*)left)->val;
res = xp_awk_makerealval (awk, r + 1.0);
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
}
else
{
xp_awk_refdownval (awk, left);
PANIC (awk, XP_AWK_EOPERAND);
}
}
else if (exp->opcode == XP_AWK_INCOP_MINUS)
{
if (left->type == XP_AWK_VAL_INT)
{
xp_long_t r = ((xp_awk_val_int_t*)left)->val;
res = xp_awk_makeintval (awk, r - 1);
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
}
else if (left->type == XP_AWK_VAL_REAL)
{
xp_real_t r = ((xp_awk_val_real_t*)left)->val;
res = xp_awk_makerealval (awk, r - 1.0);
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
}
else
{
xp_awk_refdownval (awk, left);
PANIC (awk, XP_AWK_EOPERAND);
}
}
else
{
xp_assert (!"should never happen - invalid opcode");
xp_awk_refdownval (awk, left);
PANIC (awk, XP_AWK_EINTERNAL);
}
if (__do_assignment(awk, (xp_awk_nde_var_t*)exp->left, res) == XP_NULL)
{
xp_awk_refdownval (awk, left);
return XP_NULL;
}
xp_awk_refdownval (awk, left);
return res;
}
static xp_awk_val_t* __eval_incpst (xp_awk_t* awk, xp_awk_nde_t* nde)
{
xp_awk_val_t* left, * res, * res2;
xp_awk_nde_exp_t* exp = (xp_awk_nde_exp_t*)nde;
xp_assert (exp->type == XP_AWK_NDE_EXP_INCPST);
xp_assert (exp->left != XP_NULL && exp->right == XP_NULL);
/* ugly. but let's keep going this way for the time being */
/*if (exp->left->type != XP_AWK_NDE_NAMED &&
exp->left->type != XP_AWK_NDE_GLOBAL &&
exp->left->type != XP_AWK_NDE_LOCAL &&
exp->left->type != XP_AWK_NDE_ARG &&
exp->left->type != XP_AWK_NDE_NAMEDIDX &&
exp->left->type != XP_AWK_NDE_GLOBALIDX &&
exp->left->type != XP_AWK_NDE_LOCALIDX &&
exp->left->type != XP_AWK_NDE_ARGIDX) */
if (exp->left->type < XP_AWK_NDE_NAMED ||
exp->left->type > XP_AWK_NDE_ARGIDX)
{
PANIC (awk, XP_AWK_EOPERAND);
}
left = __eval_expression (awk, exp->left);
if (left == XP_NULL) return XP_NULL;
xp_awk_refupval (left);
if (exp->opcode == XP_AWK_INCOP_PLUS)
{
if (left->type == XP_AWK_VAL_INT)
{
xp_long_t r = ((xp_awk_val_int_t*)left)->val;
res = xp_awk_makeintval (awk, r);
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
res2 = xp_awk_makeintval (awk, r + 1);
if (res2 == XP_NULL)
{
xp_awk_freeval (awk, res, xp_true);
PANIC (awk, XP_AWK_ENOMEM);
}
}
else if (left->type == XP_AWK_VAL_REAL)
{
xp_real_t r = ((xp_awk_val_real_t*)left)->val;
res = xp_awk_makerealval (awk, r);
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
res2 = xp_awk_makerealval (awk, r + 1.0);
if (res2 == XP_NULL)
{
xp_awk_freeval (awk, res, xp_true);
PANIC (awk, XP_AWK_ENOMEM);
}
}
else
{
xp_awk_refdownval (awk, left);
PANIC (awk, XP_AWK_EOPERAND);
}
}
else if (exp->opcode == XP_AWK_INCOP_MINUS)
{
if (left->type == XP_AWK_VAL_INT)
{
xp_long_t r = ((xp_awk_val_int_t*)left)->val;
res = xp_awk_makeintval (awk, r);
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
res2 = xp_awk_makeintval (awk, r - 1);
if (res2 == XP_NULL)
{
xp_awk_freeval (awk, res, xp_true);
PANIC (awk, XP_AWK_ENOMEM);
}
}
else if (left->type == XP_AWK_VAL_REAL)
{
xp_real_t r = ((xp_awk_val_real_t*)left)->val;
res = xp_awk_makerealval (awk, r);
if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
res2 = xp_awk_makerealval (awk, r - 1.0);
if (res2 == XP_NULL)
{
xp_awk_freeval (awk, res, xp_true);
PANIC (awk, XP_AWK_ENOMEM);
}
}
else
{
xp_awk_refdownval (awk, left);
PANIC (awk, XP_AWK_EOPERAND);
}
}
else
{
xp_assert (!"should never happen - invalid opcode");
xp_awk_refdownval (awk, left);
PANIC (awk, XP_AWK_EINTERNAL);
}
if (__do_assignment(awk, (xp_awk_nde_var_t*)exp->left, res2) == XP_NULL)
{
xp_awk_refdownval (awk, left);
return XP_NULL;
}
xp_awk_refdownval (awk, left);
return res;
}
static xp_awk_val_t* __eval_cnd (xp_awk_t* awk, xp_awk_nde_t* nde)
{
xp_awk_val_t* tv, * v;
xp_awk_nde_cnd_t* cnd = (xp_awk_nde_cnd_t*)nde;
tv = __eval_expression (awk, cnd->test);
if (tv == XP_NULL) return XP_NULL;
xp_awk_refupval (tv);
v = (xp_awk_boolval(tv))?
__eval_expression (awk, cnd->left):
__eval_expression (awk, cnd->right);
xp_awk_refdownval (awk, tv);
return v;
}
static xp_awk_val_t* __eval_call (xp_awk_t* awk, xp_awk_nde_t* nde)
{
xp_awk_func_t* func;
xp_awk_pair_t* pair;
xp_awk_nde_t* p;
xp_size_t nargs, i;
xp_awk_val_t* v;
xp_size_t saved_stack_top;
xp_awk_nde_call_t* call = (xp_awk_nde_call_t*)nde;
int n;
/*xp_printf (XP_TEXT(".....__eval_call\n"));*/
pair = xp_awk_map_get (&awk->tree.funcs, call->name);
if (pair == XP_NULL) PANIC (awk, XP_AWK_ENOSUCHFUNC);
func = (xp_awk_func_t*)pair->val;
xp_assert (func != XP_NULL);
if (call->nargs > func->nargs)
{
/* TODO: is this correct? what if i want to allow arbitarary numbers of arguments? */
PANIC (awk, XP_AWK_ETOOMANYARGS);
}
/*
* ---------------------
* localn <- stack top
* ---------------------
* ....
* ---------------------
* local0 local variables are pushed by __run_block
* =====================
* argn
* ---------------------
* ....
* ---------------------
* arg1
* ---------------------
* arg0
* ---------------------
* nargs
* ---------------------
* return value
* ---------------------
* previous stack top
* ---------------------
* previous stack base <- stack base
* =====================
* 0 (nargs) <- stack top
* ---------------------
* return value
* ---------------------
* previous stack top
* ---------------------
* previous stack base <- stack base
* =====================
* globaln
* ---------------------
* ....
* ---------------------
* global0
* ---------------------
*/
xp_assert (xp_sizeof(void*) >= xp_sizeof(awk->run.stack_top));
xp_assert (xp_sizeof(void*) >= xp_sizeof(awk->run.stack_base));
saved_stack_top = awk->run.stack_top;
/*xp_printf (XP_TEXT("setting up function stack frame stack_top = %ld stack_base = %ld\n"), awk->run.stack_top, awk->run.stack_base); */
if (__raw_push(awk,(void*)awk->run.stack_base) == -1)
{
PANIC (awk, XP_AWK_ENOMEM);
}
if (__raw_push(awk,(void*)saved_stack_top) == -1)
{
__raw_pop (awk);
PANIC (awk, XP_AWK_ENOMEM);
}
/* secure space for a return value. */
if (__raw_push(awk,xp_awk_val_nil) == -1)
{
__raw_pop (awk);
__raw_pop (awk);
PANIC (awk, XP_AWK_ENOMEM);
}
/* secure space for nargs */
if (__raw_push(awk,xp_awk_val_nil) == -1)
{
__raw_pop (awk);
__raw_pop (awk);
__raw_pop (awk);
PANIC (awk, XP_AWK_ENOMEM);
}
nargs = 0;
p = call->args;
while (p != XP_NULL)
{
v = __eval_expression(awk,p);
if (v == XP_NULL)
{
while (nargs > 0)
{
/* TODO: test this portion. */
--nargs;
xp_awk_refdownval (awk, STACK_ARG(awk,nargs));
__raw_pop (awk);
}
__raw_pop (awk);
__raw_pop (awk);
__raw_pop (awk);
return XP_NULL;
}
if (__raw_push(awk,v) == -1)
{
/* ugly - v needs to be freed if it doesn't have
* any reference. but its reference has not been
* updated for the successful stack push. so it adds
* up a reference and dereferences it*/
xp_awk_refupval (v);
xp_awk_refdownval (awk, v);
while (nargs > 0)
{
/* TODO: test this portion. */
--nargs;
xp_awk_refdownval (awk, STACK_ARG(awk,nargs));
__raw_pop (awk);
}
__raw_pop (awk);
__raw_pop (awk);
__raw_pop (awk);
PANIC (awk, XP_AWK_ENOMEM);
}
xp_awk_refupval (v);
nargs++;
p = p->next;
}
xp_assert (nargs == call->nargs);
while (nargs < func->nargs)
{
/* push as many nils as the number of missing actual arguments */
if (__raw_push(awk,xp_awk_val_nil) == -1)
{
while (nargs > 0)
{
/* TODO: test this portion. */
--nargs;
xp_awk_refdownval (awk, STACK_ARG(awk,nargs));
__raw_pop (awk);
}
__raw_pop (awk);
__raw_pop (awk);
__raw_pop (awk);
PANIC (awk, XP_AWK_ENOMEM);
}
nargs++;
}
awk->run.stack_base = saved_stack_top;
STACK_NARGS(awk) = (void*)nargs;
/*xp_printf (XP_TEXT("running function body\n")); */
xp_assert (func->body->type == XP_AWK_NDE_BLK);
n = __run_block(awk,(xp_awk_nde_blk_t*)func->body);
/*xp_printf (XP_TEXT("block run complete\n")); */
/* refdown args in the run.stack */
nargs = (xp_size_t)STACK_NARGS(awk);
/*xp_printf (XP_TEXT("block run complete nargs = %d\n"), nargs); */
for (i = 0; i < nargs; i++)
{
xp_awk_refdownval (awk, STACK_ARG(awk,i));
}
/*xp_printf (XP_TEXT("got return value\n")); */
/* this is the trick mentioned in __run_return_statement.
* adjust the reference count of the return value.
* the value must not be freeed event if the reference count
* is decremented to zero because its reference is increased in
* __run_return_statement regardless of its reference count. */
v = STACK_RETVAL(awk);
xp_awk_refdownval_nofree (awk, v);
awk->run.stack_top = (xp_size_t)awk->run.stack[awk->run.stack_base+1];
awk->run.stack_base = (xp_size_t)awk->run.stack[awk->run.stack_base+0];
if (awk->run.exit_level == EXIT_FUNCTION)
{
awk->run.exit_level = EXIT_NONE;
}
/*xp_printf (XP_TEXT("returning from function stack_top=%ld, stack_base=%ld\n"), awk->run.stack_top, awk->run.stack_base); */
return (n == -1)? XP_NULL: v;
}
static xp_awk_val_t* __eval_int (xp_awk_t* awk, xp_awk_nde_t* nde)
{
xp_awk_val_t* val;
val = xp_awk_makeintval (
awk, ((xp_awk_nde_int_t*)nde)->val);
if (val == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
return val;
}
static xp_awk_val_t* __eval_real (xp_awk_t* awk, xp_awk_nde_t* nde)
{
xp_awk_val_t* val;
val = xp_awk_makerealval (
awk, ((xp_awk_nde_real_t*)nde)->val);
if (val == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
return val;
}
static xp_awk_val_t* __eval_str (xp_awk_t* awk, xp_awk_nde_t* nde)
{
xp_awk_val_t* val;
val = xp_awk_makestrval (
((xp_awk_nde_str_t*)nde)->buf,
((xp_awk_nde_str_t*)nde)->len);
if (val == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
return val;
}
static xp_awk_val_t* __eval_named (xp_awk_t* awk, xp_awk_nde_t* nde)
{
xp_awk_pair_t* pair;
xp_awk_nde_var_t* tgt = (xp_awk_nde_var_t*)nde;
pair = xp_awk_map_get(&awk->run.named,tgt->id.name);
return (pair == XP_NULL)? xp_awk_val_nil: pair->val;
}
static xp_awk_val_t* __eval_global (xp_awk_t* awk, xp_awk_nde_t* nde)
{
xp_awk_nde_var_t* tgt = (xp_awk_nde_var_t*)nde;
return STACK_GLOBAL(awk,tgt->id.idxa);
}
static xp_awk_val_t* __eval_local (xp_awk_t* awk, xp_awk_nde_t* nde)
{
xp_awk_nde_var_t* tgt = (xp_awk_nde_var_t*)nde;
return STACK_LOCAL(awk,tgt->id.idxa);
}
static xp_awk_val_t* __eval_arg (xp_awk_t* awk, xp_awk_nde_t* nde)
{
xp_awk_nde_var_t* tgt = (xp_awk_nde_var_t*)nde;
return STACK_ARG(awk,tgt->id.idxa);
}
static xp_awk_val_t* __eval_indexed (
xp_awk_t* awk, xp_awk_nde_var_t* nde, xp_awk_val_map_t* map)
{
xp_awk_val_t* idx, *res;
xp_awk_pair_t* pair;
xp_awk_nde_t* tmp;
xp_char_t* str;
/* TODO: should it be an error? should it return nil? */
if (map->type != XP_AWK_VAL_MAP)
{
PANIC (awk, XP_AWK_ENOTINDEXABLE);
}
xp_assert (nde->idx != XP_NULL);
tmp = nde->idx;
/* TODO:
while (tmp != XP_NULL)
*/
{
int errnum;
idx = __eval_expression (awk, tmp);
if (idx == XP_NULL) return XP_NULL;
xp_awk_refupval (idx);
str = __val_to_str (idx, &errnum);
if (str == XP_NULL)
{
xp_awk_refdownval (awk, idx);
PANIC (awk, errnum);
}
xp_awk_refdownval (awk, idx);
/* TODO:
tmp = tmp->next;
*/
}
/* TODO: check this out........ */
pair = xp_awk_map_get (((xp_awk_val_map_t*)map)->map, str);
res = (pair == XP_NULL)? xp_awk_val_nil: (xp_awk_val_t*)pair->val;
xp_free (str);
return res;
}
static xp_awk_val_t* __eval_namedidx (xp_awk_t* awk, xp_awk_nde_t* nde)
{
xp_awk_nde_var_t* tgt = (xp_awk_nde_var_t*)nde;
xp_awk_pair_t* pair;
pair = xp_awk_map_get (&awk->run.named, tgt->id.name);
return __eval_indexed (awk, tgt,
(pair == XP_NULL)? xp_awk_val_nil: pair->val);
}
static xp_awk_val_t* __eval_globalidx (xp_awk_t* awk, xp_awk_nde_t* nde)
{
xp_awk_nde_var_t* tgt = (xp_awk_nde_var_t*)nde;
return __eval_indexed (awk, tgt, STACK_GLOBAL(awk,tgt->id.idxa));
}
static xp_awk_val_t* __eval_localidx (xp_awk_t* awk, xp_awk_nde_t* nde)
{
xp_awk_nde_var_t* tgt = (xp_awk_nde_var_t*)nde;
return __eval_indexed (awk, tgt, STACK_LOCAL(awk,tgt->id.idxa));
}
static xp_awk_val_t* __eval_argidx (xp_awk_t* awk, xp_awk_nde_t* nde)
{
xp_awk_nde_var_t* tgt = (xp_awk_nde_var_t*)nde;
return __eval_indexed (awk, tgt, STACK_ARG(awk,tgt->id.idxa));
}
static xp_awk_val_t* __eval_pos (xp_awk_t* awk, xp_awk_nde_t* nde)
{
/* TODO: */
xp_printf (XP_TEXT("eval_pos not competed....\n"));
return XP_NULL;
}
static int __raw_push (xp_awk_t* awk, void* val)
{
if (awk->run.stack_top >= awk->run.stack_limit)
{
void* tmp;
xp_size_t n;
n = awk->run.stack_limit + STACK_INCREMENT;
tmp = (void**)xp_realloc (awk->run.stack, n * xp_sizeof(void*));
if (tmp == XP_NULL) return -1;
awk->run.stack = tmp;
awk->run.stack_limit = n;
}
awk->run.stack[awk->run.stack_top++] = val;
return 0;
}
static void __raw_pop (xp_awk_t* awk)
{
xp_assert (awk->run.stack_top > awk->run.stack_base);
awk->run.stack_top--;
}
static void __raw_pop_times (xp_awk_t* awk, xp_size_t times)
{
while (times > 0)
{
--times;
__raw_pop (awk);
}
}
static int __val_to_num (xp_awk_val_t* v, xp_long_t* l, xp_real_t* r)
{
if (v->type == XP_AWK_VAL_NIL)
{
*l = 0;
return 0;
}
if (v->type == XP_AWK_VAL_INT)
{
*l = ((xp_awk_val_int_t*)v)->val;
return 0;
}
if (v->type == XP_AWK_VAL_REAL)
{
*r = ((xp_awk_val_real_t*)v)->val;
return 1;
}
if (v->type == XP_AWK_VAL_STR)
{
const xp_char_t* endptr;
/* don't care about val->len */
*l = xp_awk_strtolong (((xp_awk_val_str_t*)v)->buf, 0, &endptr);
if (*endptr == XP_CHAR('.') ||
*endptr == XP_CHAR('E') ||
*endptr == XP_CHAR('e'))
{
*r = xp_awk_strtoreal (((xp_awk_val_str_t*)v)->buf);
return 1; /* real */
}
return 0; /* long */
}
return -1; /* error */
}
static xp_char_t* __val_to_str (xp_awk_val_t* v, int* errnum)
{
if (v->type == XP_AWK_VAL_INT)
{
xp_char_t* tmp;
xp_long_t t;
xp_size_t len = 0;
t = ((xp_awk_val_int_t*)v)->val;
if (t < 0) { t = -t; len++; }
while (t > 0) { len++; t /= 10; }
tmp = xp_malloc (len + 1 * xp_sizeof(xp_char_t));
if (tmp == XP_NULL)
{
*errnum = XP_AWK_ENOMEM;
return XP_NULL;
}
t = ((xp_awk_val_int_t*)v)->val;
if (t < 0) t = -t;
tmp[len] = XP_CHAR('\0');
while (t > 0)
{
tmp[--len] = (xp_char_t)(t % 10) + XP_CHAR('0');
t /= 10;
}
if (v < 0) tmp[--len] = XP_CHAR('-');
return tmp;
}
if (v->type == XP_AWK_VAL_STR)
{
xp_char_t* tmp;
tmp = xp_strxdup (
((xp_awk_val_str_t*)v)->buf,
((xp_awk_val_str_t*)v)->len);
if (tmp == XP_NULL) *errnum = XP_AWK_ENOMEM;
return tmp;
}
/* TODO: process more value types */
*errnum = XP_AWK_EWRONGINDEX;
return XP_NULL;
}
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