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New error handling.

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This commit is contained in:
Guido van Rossum 1990-10-14 20:02:26 +00:00
parent 5c600e1614
commit 165e67edae
1 changed files with 37 additions and 36 deletions
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73
Objects/intobject.c
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@ -7,6 +7,7 @@
#include "intobject.h"
#include "stringobject.h"
#include "objimpl.h"
#include "errors.h"
/* Standard Booleans */
intobject FalseObject = {
@ -18,6 +19,20 @@ intobject TrueObject = {
1
};
static object *
err_ovf()
{
err_setstr(RuntimeError, "integer overflow");
return NULL;
}
static object *
err_zdiv()
{
err_setstr(RuntimeError, "division by zero");
return NULL;
}
object *
newintobject(ival)
long ival;
@ -25,7 +40,7 @@ newintobject(ival)
/* For efficiency, this code is copied from newobject() */
register intobject *op = (intobject *) malloc(sizeof(intobject));
if (op == NULL) {
errno = ENOMEM;
err_nomem();
}
else {
NEWREF(op);
@ -40,7 +55,7 @@ getintvalue(op)
register object *op;
{
if (!is_intobject(op)) {
errno = EBADF;
err_badarg();
return -1;
}
else
@ -83,16 +98,14 @@ intadd(v, w)
{
register long a, b, x;
if (!is_intobject(w)) {
errno = EINVAL;
err_badarg();
return NULL;
}
a = v->ob_ival;
b = ((intobject *)w) -> ob_ival;
x = a + b;
if ((x^a) < 0 && (x^b) < 0) {
errno = ERANGE;
return NULL;
}
if ((x^a) < 0 && (x^b) < 0)
return err_ovf();
return newintobject(x);
}
@ -103,16 +116,14 @@ intsub(v, w)
{
register long a, b, x;
if (!is_intobject(w)) {
errno = EINVAL;
err_badarg();
return NULL;
}
a = v->ob_ival;
b = ((intobject *)w) -> ob_ival;
x = a - b;
if ((x^a) < 0 && (x^~b) < 0) {
errno = ERANGE;
return NULL;
}
if ((x^a) < 0 && (x^~b) < 0)
return err_ovf();
return newintobject(x);
}
@ -124,16 +135,14 @@ intmul(v, w)
register long a, b;
double x;
if (!is_intobject(w)) {
errno = EINVAL;
err_badarg();
return NULL;
}
a = v->ob_ival;
b = ((intobject *)w) -> ob_ival;
x = (double)a * (double)b;
if (x > 0x7fffffff || x < (double) (long) 0x80000000) {
errno = ERANGE;
return NULL;
}
if (x > 0x7fffffff || x < (double) (long) 0x80000000)
return err_ovf();
return newintobject(a * b);
}
@ -143,13 +152,11 @@ intdiv(v, w)
register object *w;
{
if (!is_intobject(w)) {
errno = EINVAL;
return NULL;
}
if (((intobject *)w) -> ob_ival == 0) {
errno = EDOM;
err_badarg();
return NULL;
}
if (((intobject *)w) -> ob_ival == 0)
err_zdiv();
return newintobject(v->ob_ival / ((intobject *)w) -> ob_ival);
}
@ -159,13 +166,11 @@ intrem(v, w)
register object *w;
{
if (!is_intobject(w)) {
errno = EINVAL;
return NULL;
}
if (((intobject *)w) -> ob_ival == 0) {
errno = EDOM;
err_badarg();
return NULL;
}
if (((intobject *)w) -> ob_ival == 0)
err_zdiv();
return newintobject(v->ob_ival % ((intobject *)w) -> ob_ival);
}
@ -177,7 +182,7 @@ intpow(v, w)
register long iv, iw, ix;
register int neg;
if (!is_intobject(w)) {
errno = EINVAL;
err_badarg();
return NULL;
}
iv = v->ob_ival;
@ -189,10 +194,8 @@ intpow(v, w)
for (; iw > 0; iw--)
ix = ix * iv;
if (neg) {
if (ix == 0) {
errno = EDOM;
return NULL;
}
if (ix == 0)
err_zdiv();
ix = 1/ix;
}
/* XXX How to check for overflow? */
@ -206,10 +209,8 @@ intneg(v)
register long a, x;
a = v->ob_ival;
x = -a;
if (a < 0 && x < 0) {
errno = ERANGE;
return NULL;
}
if (a < 0 && x < 0)
return err_ovf();
return newintobject(x);
}