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40 results

att_uuid.h

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  • Forked from card10 / firmware
    Source project has a limited visibility.
    objexcept.c 4.01 KiB
    #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 "qstr.h"
    #include "obj.h"
    #include "objtuple.h"
    
    // This is unified class for C-level and Python-level exceptions
    // Python-level exceptions have empty ->msg and all arguments are in
    // args tuple. C-level exceptions likely have ->msg set, and args is empty.
    typedef struct mp_obj_exception_t {
        mp_obj_base_t base;
        mp_obj_t traceback; // a list object, holding (file,line,block) as numbers (not Python objects); a hack for now
        qstr id;
        vstr_t *msg;
        mp_obj_tuple_t args;
    } mp_obj_exception_t;
    
    STATIC void exception_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t o_in, mp_print_kind_t kind) {
        mp_obj_exception_t *o = o_in;
        if (o->msg != NULL) {
            print(env, "%s: %s", qstr_str(o->id), vstr_str(o->msg));
        } else {
            // Yes, that's how CPython has it
            if (kind == PRINT_REPR) {
                print(env, "%s", qstr_str(o->id));
            }
            if (kind == PRINT_STR) {
                if (o->args.len == 0) {
                    print(env, "");
                    return;
                } else if (o->args.len == 1) {
                    mp_obj_print_helper(print, env, o->args.items[0], PRINT_STR);
                    return;
                }
            }
            tuple_print(print, env, &o->args, kind);
        }
    }
    
    STATIC mp_obj_t exception_call(mp_obj_t self_in, uint n_args, uint n_kw, const mp_obj_t *args) {
        mp_obj_exception_t *base = self_in;
    
        if (n_kw != 0) {
            nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_TypeError, "%s does not take keyword arguments", qstr_str(base->id)));
        }
    
        mp_obj_exception_t *o = m_new_obj_var(mp_obj_exception_t, mp_obj_t, n_args);
        o->base.type = &exception_type;
        o->traceback = MP_OBJ_NULL;
        o->id = base->id;
        o->msg = NULL;
        o->args.len = n_args;
        memcpy(o->args.items, args, n_args * sizeof(mp_obj_t));
        return o;
    }
    
    const mp_obj_type_t exception_type = {
        { &mp_const_type },
        "exception",
        .print = exception_print,
        .call = exception_call,
    };
    
    mp_obj_t mp_obj_new_exception(qstr id) {
        return mp_obj_new_exception_msg_varg(id, NULL);
    }
    
    mp_obj_t mp_obj_new_exception_msg(qstr id, const char *msg) {
        return mp_obj_new_exception_msg_varg(id, msg);
    }
    
    mp_obj_t mp_obj_new_exception_msg_varg(qstr id, const char *fmt, ...) {
        // make exception object
        mp_obj_exception_t *o = m_new_obj_var(mp_obj_exception_t, mp_obj_t*, 0);
        o->base.type = &exception_type;
        o->traceback = MP_OBJ_NULL;
        o->id = id;
        o->args.len = 0;
        if (fmt == NULL) {
            o->msg = NULL;
        } else {
            // render exception message
            o->msg = vstr_new();
            va_list ap;
            va_start(ap, fmt);
            vstr_vprintf(o->msg, fmt, ap);
            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;
    }
    
    void mp_obj_exception_add_traceback(mp_obj_t self_in, qstr file, machine_uint_t line, qstr block) {
        assert(MP_OBJ_IS_TYPE(self_in, &exception_type));
        mp_obj_exception_t *self = self_in;
        // for traceback, we are just using the list object for convenience, it's not really a list of Python objects
        if (self->traceback == MP_OBJ_NULL) {
            self->traceback = mp_obj_new_list(0, NULL);
        }
        mp_obj_list_append(self->traceback, (mp_obj_t)(machine_uint_t)file);
        mp_obj_list_append(self->traceback, (mp_obj_t)(machine_uint_t)line);
        mp_obj_list_append(self->traceback, (mp_obj_t)(machine_uint_t)block);
    }
    
    void mp_obj_exception_get_traceback(mp_obj_t self_in, machine_uint_t *n, machine_uint_t **values) {
        assert(MP_OBJ_IS_TYPE(self_in, &exception_type));
        mp_obj_exception_t *self = self_in;
        if (self->traceback == MP_OBJ_NULL) {
            *n = 0;
            *values = NULL;
        } else {
            uint n2;
            mp_obj_list_get(self->traceback, &n2, (mp_obj_t**)values);
            *n = n2;
        }
    }