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#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <stdarg.h>
#include <assert.h>
#include "nlr.h"
#include "misc.h"
#include "mpconfig.h"
#include "obj.h"
typedef struct mp_obj_exception_t {
mp_obj_base_t base;
qstr id;
int n_args;
const void *args[];
} mp_obj_exception_t;
void exception_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t o_in) {
mp_obj_exception_t *o = o_in;
switch (o->n_args) {
case 0:
print(env, "%s", qstr_str(o->id));
break;
case 1:
print(env, "%s: %s", qstr_str(o->id), (const char*)o->args[0]);
break;
case 2:
print(env, "%s: ", qstr_str(o->id));
print(env, (const char*)o->args[0], o->args[1]);
break;
default: // here we just assume at least 3 args, but only use first 3
print(env, "%s: ", qstr_str(o->id));
print(env, (const char*)o->args[0], o->args[1], o->args[2]);
break;
}
}
const mp_obj_type_t exception_type = {
{ &mp_const_type },
"exception",
.print = exception_print,
};
mp_obj_t mp_obj_new_exception(qstr id) {
mp_obj_exception_t *o = m_new_obj(mp_obj_exception_t);
o->base.type = &exception_type;
o->id = id;
o->n_args = 0;
return o;
}
mp_obj_t mp_obj_new_exception_msg(qstr id, const char *msg) {
mp_obj_exception_t *o = m_new_obj_var(mp_obj_exception_t, void*, 1);
o->base.type = &exception_type;
o->id = id;
o->n_args = 1;
o->args[0] = msg;
return o;
}
mp_obj_t mp_obj_new_exception_msg_1_arg(qstr id, const char *fmt, const char *a1) {
mp_obj_exception_t *o = m_new_obj_var(mp_obj_exception_t, void*, 2);
o->base.type = &exception_type;
o->id = id;
o->n_args = 2;
o->args[0] = fmt;
o->args[1] = a1;
return o;
}
mp_obj_t mp_obj_new_exception_msg_2_args(qstr id, const char *fmt, const char *a1, const char *a2) {
mp_obj_exception_t *o = m_new_obj_var(mp_obj_exception_t, void*, 3);
o->base.type = &exception_type;
o->id = id;
o->n_args = 3;
o->args[0] = fmt;
o->args[1] = a1;
o->args[2] = a2;
return o;
}
mp_obj_t mp_obj_new_exception_msg_varg(qstr id, const char *fmt, ...) {
// count number of arguments by number of % signs, excluding %%
int n_args = 1; // count fmt
for (const char *s = fmt; *s; s++) {
if (*s == '%') {
if (s[1] == '%') {
s += 1;
} else {
n_args += 1;
}
}
}
// make exception object
mp_obj_exception_t *o = m_new_obj_var(mp_obj_exception_t, void*, n_args);
o->base.type = &exception_type;
o->id = id;
o->n_args = n_args;
o->args[0] = fmt;
// extract args and store them
va_list ap;
va_start(ap, fmt);
for (int i = 1; i < n_args; i++) {
o->args[i] = va_arg(ap, void*);
}
va_end(ap);
return o;
}
qstr mp_obj_exception_get_type(mp_obj_t self_in) {
assert(MP_OBJ_IS_TYPE(self_in, &exception_type));
mp_obj_exception_t *self = self_in;
return self->id;
}
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