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99 lines
2.7 KiB
99 lines
2.7 KiB
#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <stdarg.h>
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#include <assert.h>
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#include "nlr.h"
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#include "misc.h"
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#include "mpconfig.h"
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#include "obj.h"
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#include "objtuple.h"
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// This is unified class for C-level and Python-level exceptions
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// Python-level exception have empty ->msg and all arguments are in
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// args tuple. C-level excepttion likely have ->msg, and may as well
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// have args tuple (or otherwise have it as NULL).
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typedef struct mp_obj_exception_t {
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mp_obj_base_t base;
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qstr id;
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qstr msg;
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mp_obj_tuple_t args;
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} mp_obj_exception_t;
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void exception_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t o_in) {
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mp_obj_exception_t *o = o_in;
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if (o->msg != 0) {
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print(env, "%s: %s", qstr_str(o->id), qstr_str(o->msg));
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} else {
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print(env, "%s", qstr_str(o->id));
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tuple_print(print, env, &o->args);
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}
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}
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// args in reversed order
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static mp_obj_t exception_call(mp_obj_t self_in, int n_args, const mp_obj_t *args) {
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mp_obj_exception_t *base = self_in;
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mp_obj_exception_t *o = m_new_obj_var(mp_obj_exception_t, mp_obj_t*, n_args);
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o->base.type = &exception_type;
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o->id = base->id;
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o->msg = 0;
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o->args.len = n_args;
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// TODO: factor out as reusable copy_reversed()
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int j = 0;
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for (int i = n_args - 1; i >= 0; i--) {
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o->args.items[i] = args[j++];
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}
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return o;
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}
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const mp_obj_type_t exception_type = {
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{ &mp_const_type },
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"exception",
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.print = exception_print,
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.call_n = exception_call,
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};
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mp_obj_t mp_obj_new_exception(qstr id) {
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return mp_obj_new_exception_msg_varg(id, NULL);
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}
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mp_obj_t mp_obj_new_exception_msg(qstr id, const char *msg) {
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return mp_obj_new_exception_msg_varg(id, msg);
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}
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mp_obj_t mp_obj_new_exception_msg_1_arg(qstr id, const char *fmt, const char *a1) {
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return mp_obj_new_exception_msg_varg(id, fmt, a1);
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}
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mp_obj_t mp_obj_new_exception_msg_2_args(qstr id, const char *fmt, const char *a1, const char *a2) {
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return mp_obj_new_exception_msg_varg(id, fmt, a1, a2);
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}
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mp_obj_t mp_obj_new_exception_msg_varg(qstr id, const char *fmt, ...) {
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// make exception object
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mp_obj_exception_t *o = m_new_obj_var(mp_obj_exception_t, mp_obj_t*, 0);
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o->base.type = &exception_type;
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o->id = id;
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o->args.len = 0;
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if (fmt == NULL) {
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o->msg = 0;
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} else {
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// render exception message
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vstr_t *vstr = vstr_new();
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va_list ap;
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va_start(ap, fmt);
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vstr_vprintf(vstr, fmt, ap);
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va_end(ap);
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o->msg = qstr_from_str_take(vstr->buf, vstr->alloc);
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}
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return o;
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}
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qstr mp_obj_exception_get_type(mp_obj_t self_in) {
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assert(MP_OBJ_IS_TYPE(self_in, &exception_type));
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mp_obj_exception_t *self = self_in;
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return self->id;
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}
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