micropython: add micropython component

components/language/micropython/py/argcheck.c

@@ -0,0 +1,148 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2013, 2014 Damien P. George
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <assert.h>
+
+#include "py/runtime.h"
+
+void mp_arg_check_num_sig(size_t n_args, size_t n_kw, uint32_t sig) {
+    // TODO maybe take the function name as an argument so we can print nicer error messages
+
+    // The reverse of MP_OBJ_FUN_MAKE_SIG
+    bool takes_kw = sig & 1;
+    size_t n_args_min = sig >> 17;
+    size_t n_args_max = (sig >> 1) & 0xffff;
+
+    if (n_kw && !takes_kw) {
+        #if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE
+        mp_arg_error_terse_mismatch();
+        #else
+        mp_raise_TypeError(MP_ERROR_TEXT("function doesn't take keyword arguments"));
+        #endif
+    }
+
+    if (n_args_min == n_args_max) {
+        if (n_args != n_args_min) {
+            #if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE
+            mp_arg_error_terse_mismatch();
+            #else
+            mp_raise_msg_varg(&mp_type_TypeError,
+                MP_ERROR_TEXT("function takes %d positional arguments but %d were given"),
+                n_args_min, n_args);
+            #endif
+        }
+    } else {
+        if (n_args < n_args_min) {
+            #if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE
+            mp_arg_error_terse_mismatch();
+            #else
+            mp_raise_msg_varg(&mp_type_TypeError,
+                MP_ERROR_TEXT("function missing %d required positional arguments"),
+                n_args_min - n_args);
+            #endif
+        } else if (n_args > n_args_max) {
+            #if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE
+            mp_arg_error_terse_mismatch();
+            #else
+            mp_raise_msg_varg(&mp_type_TypeError,
+                MP_ERROR_TEXT("function expected at most %d arguments, got %d"),
+                n_args_max, n_args);
+            #endif
+        }
+    }
+}
+
+void mp_arg_parse_all(size_t n_pos, const mp_obj_t *pos, mp_map_t *kws, size_t n_allowed, const mp_arg_t *allowed, mp_arg_val_t *out_vals) {
+    size_t pos_found = 0, kws_found = 0;
+    for (size_t i = 0; i < n_allowed; i++) {
+        mp_obj_t given_arg;
+        if (i < n_pos) {
+            if (allowed[i].flags & MP_ARG_KW_ONLY) {
+                goto extra_positional;
+            }
+            pos_found++;
+            given_arg = pos[i];
+        } else {
+            mp_map_elem_t *kw = mp_map_lookup(kws, MP_OBJ_NEW_QSTR(allowed[i].qst), MP_MAP_LOOKUP);
+            if (kw == NULL) {
+                if (allowed[i].flags & MP_ARG_REQUIRED) {
+                    #if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE
+                    mp_arg_error_terse_mismatch();
+                    #else
+                    mp_raise_msg_varg(&mp_type_TypeError, MP_ERROR_TEXT("'%q' argument required"), allowed[i].qst);
+                    #endif
+                }
+                out_vals[i] = allowed[i].defval;
+                continue;
+            } else {
+                kws_found++;
+                given_arg = kw->value;
+            }
+        }
+        if ((allowed[i].flags & MP_ARG_KIND_MASK) == MP_ARG_BOOL) {
+            out_vals[i].u_bool = mp_obj_is_true(given_arg);
+        } else if ((allowed[i].flags & MP_ARG_KIND_MASK) == MP_ARG_INT) {
+            out_vals[i].u_int = mp_obj_get_int(given_arg);
+        } else {
+            assert((allowed[i].flags & MP_ARG_KIND_MASK) == MP_ARG_OBJ);
+            out_vals[i].u_obj = given_arg;
+        }
+    }
+    if (pos_found < n_pos) {
+    extra_positional:
+        #if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE
+        mp_arg_error_terse_mismatch();
+        #else
+        // TODO better error message
+        mp_raise_TypeError(MP_ERROR_TEXT("extra positional arguments given"));
+        #endif
+    }
+    if (kws_found < kws->used) {
+        #if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE
+        mp_arg_error_terse_mismatch();
+        #else
+        // TODO better error message
+        mp_raise_TypeError(MP_ERROR_TEXT("extra keyword arguments given"));
+        #endif
+    }
+}
+
+void mp_arg_parse_all_kw_array(size_t n_pos, size_t n_kw, const mp_obj_t *args, size_t n_allowed, const mp_arg_t *allowed, mp_arg_val_t *out_vals) {
+    mp_map_t kw_args;
+    mp_map_init_fixed_table(&kw_args, n_kw, args + n_pos);
+    mp_arg_parse_all(n_pos, args, &kw_args, n_allowed, allowed, out_vals);
+}
+
+NORETURN void mp_arg_error_terse_mismatch(void) {
+    mp_raise_TypeError(MP_ERROR_TEXT("argument num/types mismatch"));
+}
+
+#if MICROPY_CPYTHON_COMPAT
+NORETURN void mp_arg_error_unimpl_kw(void) {
+    mp_raise_NotImplementedError(MP_ERROR_TEXT("keyword argument(s) not yet implemented - use normal args instead"));
+}
+#endif