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operators.c
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operators.c
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/******************************************/
#include "splinter.h"
/******************************************/
//
// __print_char is a hot spot as pretty much majority
// of the routines end up calling it. Compiler inlines
// it, but it is not enough, probably handwritten
// assembly preprocessor macro could do better?
//
#ifdef SPLINTER_TRUNCATE
static CONTEXTCALL __print_char(int c, context_p o) {
if (o->index < CONTEXT_BUFF) {
o->buffer[o->index++] = c;
}
return 0;
}
#else
static CONTEXTCALL __print_char(int c, context_p o) {
o->buffer[(o->index++) & (CONTEXT_BUFF - 1)] = c;
return 0;
}
#endif
static CONTEXTCALL __print_string(char * c, context_p o)
{
if(c) {
for(; *c; c++)
__print_char(*c, o);
} else {
debug(DEBUG_ERR, "NULL pointer");
__print_char('N', o);
__print_char('U', o);
__print_char('L', o);
__print_char('L', o);
}
return 0;
}
static char * __hex_lookup_table = "0123456789abcdef";
static CONTEXTCALL __print_byte(uint_t hex, context_p o)
{
__print_char(__hex_lookup_table[(hex >> 4) & 0x0f], o);
__print_char(__hex_lookup_table[(hex >> 0) & 0x0f], o);
return 0;
}
static CONTEXTCALL __print_hex0(uint_t hex, context_p o)
{
int i;
DEBUG();
for(i = (uint_s * 8) - 4; i >= 0; i -= 4)
__print_char(__hex_lookup_table[(hex >> i) & 0x0f], o);
return 0;
}
static CONTEXTCALL __print_hex(uint_t hex, context_p o)
{
char buff[32];
int i;
if(!hex)
return __print_char('0', o);
for(i = sizeof(buff) - 1; hex; hex >>= 4)
buff[i--] = __hex_lookup_table[hex & 0x0f];
for(i++; i < sizeof(buff); i++)
__print_char(buff[i], o);
return 0;
}
// Needs optimization, that is, an optimized
// implementation needs to be stolen.
static CONTEXTCALL __print_uint(uint_t u, context_p o, int_t width)
{
char buff[32];
uint_t j = sizeof(buff) - 1, l = 0;
if(u) {
for(; u; u /= 10, l++)
buff[j--] = '0' + (u % 10);
} else {
buff[j--] = '0';
l++;
}
if(0 < width && width < sizeof(buff)) {
for(; l < width; l++)
buff[j--] = '0';
}
for(j++; j < sizeof(buff);)
__print_char(buff[j++], o);
return 0;
}
static CONTEXTCALL __print_int(int_t i, context_p o, int_t width)
{
if(i < 0) {
return __print_char('-', o) + __print_uint(-i, o, width);
} else {
return __print_uint(i, o, width);
}
}
/***********************************************************/
CONTEXTCALL operator_null(atom_p a, context_p c)
{
DEBUG();
return 0;
}
CONTEXTCALL operator_value(atom_p a, context_p c)
{
DEBUG();
return atom_data(a);
}
CONTEXTCALL operator_string(atom_p a, context_p c)
{
DEBUG();
return __print_string((char *)atom_data(a), c);
}
CONTEXTCALL operator_hex(atom_p a, context_p c)
{
DEBUG();
return __print_hex(atom_data(a), c);
}
CONTEXTCALL operator_int(atom_p a, context_p c)
{
DEBUG();
return __print_int(atom_data(a), c, -1);
}
CONTEXTCALL operator_uint(atom_p a, context_p c)
{
DEBUG();
return __print_uint(atom_data(a), c, -1);
}
CONTEXTCALL operator_exec(atom_p a, context_p c)
{
uint_t i = 0;
DEBUG();
for(a = atom_child(a); a; a = atom_next(a))
if ((i = atom_call(a, c)) != 0) break;
return i;
}
/***********************************************************/
CONTEXTCALL operator_add(atom_p a, context_p c)
{
uint_t k = 0;
DEBUG();
for(a = atom_child(a); a; a = atom_next(a))
k += atom_call(a, c);
return k;
}
CONTEXTCALL operator_sub(atom_p a, context_p c)
{
uint_t k = 0;
DEBUG();
if((a = atom_child(a)) != 0) {
k = atom_call(a, c);
for(a = atom_next(a); a; a = atom_next(a))
k -= atom_call(a, c);
}
return k;
}
CONTEXTCALL operator_mul(atom_p a, context_p c)
{
uint_t k = 0;
DEBUG();
if((a = atom_child(a)) != 0) {
k = atom_call(a, c);
for(a = atom_next(a); a; a = atom_next(a))
k *= atom_call(a, c);
}
return k;
}
CONTEXTCALL operator_div(atom_p a, context_p c)
{
uint_t k = 0, i;
DEBUG();
if((a = atom_child(a)) != 0) {
k = atom_call(a, c);
for(a = atom_next(a); a; a = atom_next(a)) {
i = atom_call(a, c);
k = i ? k / i : k;
}
}
return k;
}
/***********************************************************/
CONTEXTCALL operator_and(atom_p a, context_p c)
{
uint_t k = 0;
DEBUG();
if((a = atom_child(a)) != 0) {
k = (atom_call(a, c) != 0);
for(a = atom_next(a); a; a = atom_next(a))
k &= (atom_call(a, c) != 0);
}
return k;
}
CONTEXTCALL operator_or(atom_p a, context_p c)
{
uint_t k = 0;
DEBUG();
if((a = atom_child(a)) != 0) {
k = (atom_call(a, c) != 0);
for(a = atom_next(a); a; a = atom_next(a))
k |= (atom_call(a, c) != 0);
}
return k;
}
CONTEXTCALL operator_not(atom_p a, context_p c)
{
DEBUG();
if((a = atom_child(a)) != NULL)
return atom_call(a, c) ? 0 : 1;
return 0;
}
/***********************************************************/
CONTEXTCALL operator_bit_and(atom_p a, context_p c)
{
uint_t k = 0;
DEBUG();
if((a = atom_child(a)) != 0) {
k = atom_call(a, c);
for(a = atom_next(a); a; a = atom_next(a))
k &= atom_call(a, c);
}
return k;
}
CONTEXTCALL operator_bit_or(atom_p a, context_p c)
{
uint_t k = 0;
DEBUG();
if((a = atom_child(a)) != 0) {
k = atom_call(a, c);
for(a = atom_next(a); a; a = atom_next(a))
k |= atom_call(a, c);
}
return k;
}
CONTEXTCALL operator_bit_xor(atom_p a, context_p c)
{
uint_t k = 0;
DEBUG();
if((a = atom_child(a)) != 0) {
k = atom_call(a, c);
for(a = atom_next(a); a; a = atom_next(a))
k ^= atom_call(a, c);
}
return k;
}
CONTEXTCALL operator_bit_not(atom_p a, context_p c)
{
DEBUG();
if((a = atom_child(a)) != NULL)
return ~atom_call(a, c);
return 0;
}
CONTEXTCALL operator_bit_shr(atom_p a, context_p c)
{
uint_t v = 0;
DEBUG();
if((a = atom_child(a)) != NULL) {
v = atom_call(a, c);
if(v && (a = atom_next(a)) != NULL)
v >>= atom_call(a, c);
}
return v;
}
CONTEXTCALL operator_bit_shl(atom_p a, context_p c)
{
uint_t v = 0;
DEBUG();
if((a = atom_child(a)) != NULL) {
v = atom_call(a, c);
if(v && (a = atom_next(a)) != NULL)
v <<= atom_call(a, c);
}
return v;
}
/***********************************************************/
CONTEXTCALL operator_return(atom_p a, context_p c)
{
DEBUG();
if((a = atom_child(a)) == NULL)
return c->ret;
c->ret = atom_call(a, c);
return 0;
}
CONTEXTCALL operator_memory(atom_p a, context_p c)
{
uint_t mem;
DEBUG();
if((a = atom_child(a)) != NULL) {
mem = atom_call(a, c);
if(!mem)
return 0;
if((a = atom_next(a)) == NULL)
return *((uint_t *) mem);
*((uint_t *) mem) = atom_call(a, c);
}
return 0;
}
CONTEXTCALL operator_register(atom_p a, context_p c)
{
uint_t reg;
DEBUG();
if((a = atom_child(a)) != NULL) {
reg = atom_call(a, c);
if(reg >= CONTEXT_REGS)
return 0;
if((a = atom_next(a)) == NULL)
return (&(c->reg0))[reg];
(&(c->reg0))[reg] = atom_call(a, c);
}
return 0;
}
CONTEXTCALL operator_argument(atom_p a, context_p c)
{
uint_t arg;
DEBUG();
if((a = atom_child(a)) != NULL) {
arg = atom_call(a, c);
if(arg >= CONTEXT_ARGS)
return 0;
if((a = atom_next(a)) == NULL)
return (&(c->arg0))[arg];
(&(c->arg0))[arg] = atom_call(a, c);
}
return 0;
}
CONTEXTCALL operator_variable(atom_p a, context_p c)
{
uint_t var;
DEBUG();
if((a = atom_child(a)) != NULL) {
var = atom_call(a, c);
if(var >= CONTEXT_VARS)
return 0;
if((a = atom_next(a)) == NULL)
return (&(c->var0))[var];
(&(c->var0))[var] = atom_call(a, c);
}
return 0;
}
CONTEXTCALL operator_store(atom_p a, context_p c)
{
uint_t store;
hook_p h;
DEBUG();
if((h = (hook_p)c->link) != NULL && (a = atom_child(a)) != NULL) {
store = atom_call(a, c);
if(store >= HOOK_STORE)
return 0;
if((a = atom_next(a)) == NULL)
return h->store[store];
h->store[store] = atom_call(a, c);
}
return 0;
}
/***********************************************************/
CONTEXTCALL operator_buffer_flush(atom_p a, context_p c)
{
hook_p h;
DEBUG();
if((h = (hook_p)c->link) != NULL && h->dumper) {
if(c->index > CONTEXT_BUFF)
h->dropped += c->index - CONTEXT_BUFF;
h->dumper(c);
}
return 0;
}
CONTEXTCALL operator_buffer_clear(atom_p a, context_p c)
{
DEBUG();
c->index = 0;
return 0;
}
/***********************************************************/
CONTEXTCALL operator_print_char(atom_p a, context_p c)
{
DEBUG();
if((a = atom_child(a)) != NULL)
__print_char(atom_call(a, c) & 0xff, c);
return 0;
}
CONTEXTCALL operator_print_byte(atom_p a, context_p c)
{
DEBUG();
if((a = atom_child(a)) != NULL)
__print_byte(atom_call(a, c) & 0xff, c);
return 0;
}
CONTEXTCALL operator_print_hex(atom_p a, context_p c)
{
DEBUG();
if((a = atom_child(a)) != NULL)
__print_hex(atom_call(a, c), c);
return 0;
}
CONTEXTCALL operator_print_hex0(atom_p a, context_p c)
{
DEBUG();
if((a = atom_child(a)) != NULL)
__print_hex0(atom_call(a, c), c);
return 0;
}
CONTEXTCALL operator_print_int(atom_p a, context_p c)
{
uint_t i;
int_t l;
DEBUG();
if((a = atom_child(a)) != NULL) {
i = atom_call(a, c);
if ((a = atom_next(a)) != NULL) {
l = (int_t)atom_call(a, c);
} else {
l = -1;
}
__print_int(i, c, l);
}
return 0;
}
CONTEXTCALL operator_print_uint(atom_p a, context_p c)
{
uint_t u;
int_t l;
DEBUG();
if((a = atom_child(a)) != NULL) {
u = atom_call(a, c);
if ((a = atom_next(a)) != NULL) {
l = (int_t)atom_call(a, c);
} else {
l = -1;
}
__print_uint(u, c, l);
}
return 0;
}
CONTEXTCALL operator_print_chars(atom_p a, context_p c)
{
uint_t l, i;
byte_p b;
DEBUG();
if((a = atom_child(a)) != NULL) {
b = (byte_p) atom_call(a, c);
if(!b || (a = atom_next(a)) == NULL)
return 0;
l = atom_call(a, c);
a = atom_next(a);
for(i = 0; i < l; i++, b++) {
__print_char((uint_t) (*b), c);
if(i < l - 1) {
if (a) {
operator_string(a, c);
} else {
__print_string(" ", c);
}
}
}
}
return 0;
}
CONTEXTCALL operator_print_bytes(atom_p a, context_p c)
{
uint_t l, i;
byte_p b;
DEBUG();
if((a = atom_child(a)) != NULL) {
b = (byte_p) atom_call(a, c);
if(!b || (a = atom_next(a)) == NULL)
return 0;
l = atom_call(a, c);
a = atom_next(a);
for(i = 0; i < l; i++, b++) {
__print_byte((uint_t) (*b), c);
if(i < l - 1) {
if (a) {
operator_string(a, c);
} else {
__print_string(" ", c);
}
}
}
}
return 0;
}
CONTEXTCALL operator_print_uints(atom_p a, context_p c)
{
uint_t l, i;
uint_p v;
DEBUG();
if((a = atom_child(a)) != NULL) {
v = (uint_p) atom_call(a, c);
if(!v || (a = atom_next(a)) == NULL)
return 0;
l = atom_call(a, c);
a = atom_next(a);
for(i = 0; i < l; i++, v++) {
__print_hex0(*v, c);
if(i < l - 1) {
if (a) {
operator_string(a, c);
} else {
__print_string(" ", c);
}
}
}
}
return 0;
}
CONTEXTCALL operator_print_string(atom_p a, context_p c)
{
DEBUG();
for(a = atom_child(a); a; a = atom_next(a))
__print_string((char *)atom_call(a, c), c);
return 0;
}
CONTEXTCALL operator_print_argv(atom_p a, context_p c)
{
int_t limit = -1, i;
char **val;
DEBUG();
if((a = atom_child(a)) != NULL) {
val = (char **) atom_call(a, c);
if ((a = atom_next(a)) != NULL) {
limit = (int_t)atom_call(a, c);
a = atom_next(a);
}
if (limit >= 0) {
for(i = 0; i < limit && *val; i++, val++) {
__print_string(*val, c);
if(i < limit - 1) {
if (a) {
operator_string(a, c);
} else {
__print_string(", ", c);
}
}
}
} else {
while(*val) {
__print_string(*val, c);
val++;
if(*val) {
if (a) {
operator_string(a, c);
} else {
__print_string(", ", c);
}
}
}
}
}
return 0;
}
CONTEXTCALL operator_print_return(atom_p a, context_p c)
{
DEBUG();
if((a = atom_child(a)) == NULL)
__print_hex0(c->ret, c);
return 0;
}
CONTEXTCALL operator_print_memory(atom_p a, context_p c)
{
uint_t mem;
DEBUG();
if((a = atom_child(a)) != NULL) {
if ((mem = atom_call(a, c)) != 0)
__print_hex0(*((uint_t *)mem), c);
}
return 0;
}
CONTEXTCALL operator_print_register(atom_p a, context_p c)
{
uint_t reg;
DEBUG();
if((a = atom_child(a)) != NULL) {
if ((reg = atom_call(a, c)) < CONTEXT_REGS)
__print_hex0((&(c->reg0))[reg], c);
}
return 0;
}
CONTEXTCALL operator_print_argument(atom_p a, context_p c)
{
uint_t arg;
DEBUG();
if((a = atom_child(a)) != NULL) {
arg = atom_call(a, c);
if (arg < CONTEXT_ARGS)
__print_hex0((&(c->arg0))[arg], c);
}
return 0;
}
CONTEXTCALL operator_print_variable(atom_p a, context_p c)
{
uint_t var;
DEBUG();
if((a = atom_child(a)) != NULL) {
if ((var = atom_call(a, c)) < CONTEXT_VARS)
__print_hex0((&(c->var0))[var], c);
}
return 0;
}
CONTEXTCALL operator_print_store(atom_p a, context_p c)
{
uint_t store;
hook_p h;
DEBUG();
if((h = (hook_p)c->link) != NULL && (a = atom_child(a)) != NULL) {
if ((store = atom_call(a, c)) < HOOK_STORE)
__print_hex0(h->store[store], c);
}
return 0;
}
/***********************************************************/
CONTEXTCALL operator_if(atom_p a, context_p c)
{
int_t err;
atom_p if_atom, true_atom;
DEBUG();
if((if_atom = atom_child(a)) != NULL && (true_atom = atom_next(if_atom)) != NULL) {
if ((err = (int_t)atom_call(if_atom, c)) < 0) {
return -1;
} else if(err) {
return atom_call(true_atom, c);
} else {
if(true_atom->next) {
return atom_call(true_atom->next, c);
}
}
}
return 0;
}
CONTEXTCALL operator_not_if(atom_p a, context_p c)
{
int_t err;
atom_p if_atom, false_atom;
DEBUG();
if((if_atom = atom_child(a)) != NULL && (false_atom = atom_next(if_atom)) != NULL) {
if ((err = (int_t)atom_call(if_atom, c)) < 0) {
return -1;
}
if(!err) {
return atom_call(false_atom, c);
} else {
if(false_atom->next) {
return atom_call(false_atom->next, c);
}
}
}
return 0;
}
CONTEXTCALL operator_is_eq(atom_p a, context_p c)
{
atom_p b;
DEBUG();
if((a = atom_child(a)) != NULL && (b = atom_next(a)) != NULL) {
return (atom_call(a, c) == atom_call(b, c));
}
return -1;
}
CONTEXTCALL operator_is_lt(atom_p a, context_p c)
{
atom_p b;
DEBUG();
if((a = atom_child(a)) != NULL && (b = atom_next(a)) != NULL) {
return (atom_call(a, c) < atom_call(b, c));
}
return -1;
}
CONTEXTCALL operator_is_le(atom_p a, context_p c)
{
atom_p b;
DEBUG();
if((a = atom_child(a)) != NULL && (b = atom_next(a)) != NULL) {
return (atom_call(a, c) <= atom_call(b, c));
}
return -1;
}
CONTEXTCALL operator_is_gt(atom_p a, context_p c)
{
atom_p b;
DEBUG();
if((a = atom_child(a)) != NULL && (b = atom_next(a)) != NULL) {
return (atom_call(a, c) > atom_call(b, c));
}
return -1;
}
CONTEXTCALL operator_is_ge(atom_p a, context_p c)
{
atom_p b;
DEBUG();
if((a = atom_child(a)) != NULL && (b = atom_next(a)) != NULL) {
return (atom_call(a, c) >= atom_call(b, c));
}
return -1;
}
CONTEXTCALL operator_is_null(atom_p a, context_p c)
{
DEBUG();
if((a = atom_child(a)) != NULL) {
return !atom_call(a, c);
}
return -1;
}
CONTEXTCALL operator_is_err(atom_p a, context_p c)
{
DEBUG();
if((a = atom_child(a)) != NULL) {
#ifdef __KERNEL__
return IS_ERR((void *)atom_call(a, c));
#else
return ((int_t)atom_call(a, c) < 0);
#endif
}
return -1;
}
/***********************************************************/
CONTEXTCALL operator_str_length(atom_p a, context_p c)
{
uint_t addr;
byte_p ptr;
byte_t terminator;
DEBUG();
if((a = atom_child(a)) != NULL && (addr = atom_call(a, c)) != 0)
{
if((a = atom_next(a)) == NULL
|| (terminator = (byte_t) (0xff & atom_call(a, c))) == 0)
return strlen((char *) addr);
for(ptr = (byte_p) addr; *ptr != terminator; ptr++);
return ptr - (byte_p)addr;
}
return 0;
}
CONTEXTCALL operator_str_equal(atom_p a, context_p c)
{
byte_p data_a, data_b;
atom_p b;
DEBUG();
if((a = atom_child(a)) != NULL && (b = atom_next(a)) != NULL) {
data_a = (byte_p) atom_call(a, c);
data_b = (byte_p) atom_call(b, c);
if(data_a == NULL)
return (data_b == NULL) ? 0 : (uint_t)-1;
if(data_b == NULL)
return (uint_t)-1;
if((b = atom_next(b)) != NULL)
return (strncmp((char *) data_a, (char *) data_b, atom_call(b, c)) == 0);
return (strcmp((char *) data_a, (char *) data_b) == 0);
}
return (uint_t)-1;
}
CONTEXTCALL operator_str_find(atom_p a, context_p c)
{
char * str_a, * str_b;
atom_p b;
DEBUG();
if((a = atom_child(a)) != NULL && (b = atom_next(a)) != NULL) {
str_a = (char *) atom_call(a, c);
if(str_a == NULL)
return (uint_t)-1;
str_b = (char *) atom_call(b, c);
if(str_b == NULL)
return (uint_t)-1;
return (uint_t)strstr(str_a, str_b);
}
return (uint_t)-1;
}
CONTEXTCALL operator_str_contains(atom_p a, context_p c)
{
char * str_a, * str_b;
atom_p b;
DEBUG();
if((a = atom_child(a)) != NULL && (b = atom_next(a)) != NULL) {
str_a = (char *) atom_call(a, c);
if(str_a == NULL)
return (uint_t)-1;
str_b = (char *) atom_call(b, c);
if(str_b == NULL)
return (uint_t)-1;
return (strstr(str_a, str_b) != NULL);
}
return (uint_t)-1;
}
CONTEXTCALL operator_str_starts(atom_p a, context_p c)
{
char * str_a, * str_b;
uint_t len_a, len_b;
atom_p b;
DEBUG();
if((a = atom_child(a)) != NULL && (b = atom_next(a)) != NULL) {
str_a = (char *) atom_call(a, c);
if(str_a == NULL)
return (uint_t)-1;
str_b = (char *) atom_call(b, c);
if(str_b == NULL)
return (uint_t)-1;
len_a = strlen(str_a);
len_b = strlen(str_b);
if (len_a < len_b) return 0;
return (strncmp(str_a, str_b, len_b) == 0);
}
return (uint_t)-1;
}
CONTEXTCALL operator_str_ends(atom_p a, context_p c)
{
char * str_a, * str_b;
uint_t len_a, len_b;
atom_p b;
DEBUG();
if((a = atom_child(a)) != NULL && (b = atom_next(a)) != NULL) {
str_a = (char *) atom_call(a, c);
if(str_a == NULL)
return (uint_t)-1;
str_b = (char *) atom_call(b, c);
if(str_b == NULL)
return (uint_t)-1;
len_a = strlen(str_a);
len_b = strlen(str_b);
if (len_a < len_b) return 0;
return (strncmp(str_a + (len_a - len_b), str_b, len_b) == 0);
}
return (uint_t)-1;
}
/***********************************************************/
CONTEXTCALL operator_call(atom_p a, context_p c)
{
void *callback_address;
if((a = atom_child(a)) == NULL)
return 0;
if((callback_address = (void *) atom_call(a, c)) == NULL)
return 0;
DEBUG("calling code @ %p", callback_address);
context_shot(c, callback_address);
return 0;
}
CONTEXTCALL operator_print_ipv4(atom_p a, context_p c)
{
uint_t ip;
DEBUG();
if((a = atom_child(a)) != NULL) {
ip = atom_call(a, c);
__print_uint(ip & 0xff, c, -1);
__print_char('.', c);
__print_uint((ip >> 8) & 0xff, c, -1);
__print_char('.', c);
__print_uint((ip >> 16) & 0xff, c, -1);
__print_char('.', c);
__print_uint((ip >> 24) & 0xff, c, -1);
}
return 0;
}
CONTEXTCALL operator_flip(atom_p a, context_p c)
{
uint_t w;
DEBUG();
if((a = atom_child(a)) != NULL) {
w = atom_call(a, c);
#ifdef __amd64__
return
((w >> 56) & 0x00000000000000ff)
| ((w >> 40) & 0x000000000000ff00)
| ((w >> 24) & 0x0000000000ff0000)
| ((w >> 8) & 0x00000000ff000000)
| ((w << 8) & 0x000000ff00000000)
| ((w << 24) & 0x0000ff0000000000)
| ((w << 40) & 0x00ff000000000000)
| ((w << 56) & 0xff00000000000000);
#else
return
((w >> 24) & 0x000000ff)
| ((w >> 8) & 0x0000ff00)
| ((w << 8) & 0x00ff0000)
| ((w << 24) & 0xff000000);
#endif
}
return 0;
}
CONTEXTCALL operator_while(atom_p a, context_p c)
{
atom_p while_atom, exec_atom;
int_t err = -1;
DEBUG();
if((while_atom = atom_child(a)) != NULL && (exec_atom = atom_next(while_atom)) != NULL) {
for(; (err = (int_t)atom_call(while_atom, c)) > 0;) {
if ((err = (int_t)atom_call(exec_atom, c)) != 0) break;
}
}
return (err < 0) ? (uint_t)err : 0;
}
CONTEXTCALL operator_not_while(atom_p a, context_p c)
{
atom_p while_atom, exec_atom;
int_t err = -1;
DEBUG();
if((while_atom = atom_child(a)) != NULL && (exec_atom = atom_next(while_atom)) != NULL) {
for(; (err = (int_t)atom_call(while_atom, c)) == 0;) {
if ((err = (int_t)atom_call(exec_atom, c)) != 0) break;
}
}
return (err < 0) ? (uint_t)err : 0;
}
CONTEXTCALL operator_repeat(atom_p a, context_p c)
{
atom_p for_atom, exec_atom;
uint_t i;
int_t err = 0;
DEBUG();
if((for_atom = atom_child(a)) != NULL && (exec_atom = atom_next(for_atom)) != NULL) {
i = atom_call(for_atom, c);
if((int_t) i < 0)