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Guido van Rossum 1990-12-20 15:06:42 +00:00
parent 226d79eb4a
commit 3f5da24ea3
72 changed files with 3363 additions and 2061 deletions
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134
Python/structmember.c Normal file
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/* Map C struct members to Python object attributes */
#include "allobjects.h"
#include "structmember.h"
object *
getmember(addr, mlist, name)
char *addr;
struct memberlist *mlist;
char *name;
{
struct memberlist *l;
for (l = mlist; l->name != NULL; l++) {
if (strcmp(l->name, name) == 0) {
object *v;
addr += l->offset;
switch (l->type) {
case T_SHORT:
v = newintobject((long) *(short*)addr);
break;
case T_INT:
v = newintobject((long) *(int*)addr);
break;
case T_LONG:
v = newintobject(*(long*)addr);
break;
case T_FLOAT:
v = newfloatobject((double)*(float*)addr);
break;
case T_DOUBLE:
v = newfloatobject(*(double*)addr);
break;
case T_STRING:
if (*(char**)addr == NULL) {
INCREF(None);
v = None;
}
else
v = newstringobject(*(char**)addr);
break;
case T_OBJECT:
v = *(object **)addr;
if (v == NULL)
v = None;
INCREF(v);
break;
default:
err_setstr(SystemError, "bad memberlist type");
v = NULL;
}
return v;
}
}
err_setstr(NameError, name);
return NULL;
}
int
setmember(addr, mlist, name, v)
char *addr;
struct memberlist *mlist;
char *name;
object *v;
{
struct memberlist *l;
for (l = mlist; l->name != NULL; l++) {
if (strcmp(l->name, name) == 0) {
if (l->readonly || l->type == T_STRING) {
err_setstr(RuntimeError, "readonly attribute");
return -1;
}
addr += l->offset;
switch (l->type) {
case T_SHORT:
if (!is_intobject(v)) {
err_badarg();
return -1;
}
*(short*)addr = getintvalue(v);
break;
case T_INT:
if (!is_intobject(v)) {
err_badarg();
return -1;
}
*(int*)addr = getintvalue(v);
break;
case T_LONG:
if (!is_intobject(v)) {
err_badarg();
return -1;
}
*(long*)addr = getintvalue(v);
break;
case T_FLOAT:
if (is_intobject(v))
*(float*)addr = getintvalue(v);
else if (is_floatobject(v))
*(float*)addr = getfloatvalue(v);
else {
err_badarg();
return -1;
}
break;
case T_DOUBLE:
if (is_intobject(v))
*(double*)addr = getintvalue(v);
else if (is_floatobject(v))
*(double*)addr = getfloatvalue(v);
else {
err_badarg();
return -1;
}
break;
case T_OBJECT:
XDECREF(*(object **)addr);
XINCREF(v);
*(object **)addr = v;
break;
default:
err_setstr(SystemError, "bad memberlist type");
return -1;
}
return 0;
}
}
err_setstr(NameError, name);
return NULL;
}