/* * This file is part of the Micro Python 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 #include #include #include #include "py/nlr.h" #include "py/obj.h" #include "py/objtype.h" #include "py/objint.h" #include "py/objstr.h" #include "py/runtime0.h" #include "py/runtime.h" #include "py/stackctrl.h" #include "py/stream.h" // for mp_obj_print mp_obj_type_t *mp_obj_get_type(mp_const_obj_t o_in) { if (MP_OBJ_IS_SMALL_INT(o_in)) { return (mp_obj_type_t*)&mp_type_int; } else if (MP_OBJ_IS_QSTR(o_in)) { return (mp_obj_type_t*)&mp_type_str; #if MICROPY_PY_BUILTINS_FLOAT } else if (mp_obj_is_float(o_in)) { return (mp_obj_type_t*)&mp_type_float; #endif } else { const mp_obj_base_t *o = MP_OBJ_TO_PTR(o_in); return (mp_obj_type_t*)o->type; } } const char *mp_obj_get_type_str(mp_const_obj_t o_in) { return qstr_str(mp_obj_get_type(o_in)->name); } void mp_obj_print_helper(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) { // There can be data structures nested too deep, or just recursive MP_STACK_CHECK(); #ifndef NDEBUG if (o_in == MP_OBJ_NULL) { mp_print_str(print, "(nil)"); return; } #endif mp_obj_type_t *type = mp_obj_get_type(o_in); if (type->print != NULL) { type->print((mp_print_t*)print, o_in, kind); } else { mp_printf(print, "<%q>", type->name); } } void mp_obj_print(mp_obj_t o_in, mp_print_kind_t kind) { mp_obj_print_helper(MP_PYTHON_PRINTER, o_in, kind); } // helper function to print an exception with traceback void mp_obj_print_exception(const mp_print_t *print, mp_obj_t exc) { if (mp_obj_is_exception_instance(exc)) { size_t n, *values; mp_obj_exception_get_traceback(exc, &n, &values); if (n > 0) { assert(n % 3 == 0); mp_print_str(print, "Traceback (most recent call last):\n"); for (int i = n - 3; i >= 0; i -= 3) { #if MICROPY_ENABLE_SOURCE_LINE mp_printf(print, " File \"%q\", line %d", values[i], (int)values[i + 1]); #else mp_printf(print, " File \"%q\"", values[i]); #endif // the block name can be NULL if it's unknown qstr block = values[i + 2]; if (block == MP_QSTR_NULL) { mp_print_str(print, "\n"); } else { mp_printf(print, ", in %q\n", block); } } } } mp_obj_print_helper(print, exc, PRINT_EXC); mp_print_str(print, "\n"); } bool mp_obj_is_true(mp_obj_t arg) { if (arg == mp_const_false) { return 0; } else if (arg == mp_const_true) { return 1; } else if (arg == mp_const_none) { return 0; } else if (MP_OBJ_IS_SMALL_INT(arg)) { if (MP_OBJ_SMALL_INT_VALUE(arg) == 0) { return 0; } else { return 1; } } else { mp_obj_type_t *type = mp_obj_get_type(arg); if (type->unary_op != NULL) { mp_obj_t result = type->unary_op(MP_UNARY_OP_BOOL, arg); if (result != MP_OBJ_NULL) { return result == mp_const_true; } } mp_obj_t len = mp_obj_len_maybe(arg); if (len != MP_OBJ_NULL) { // obj has a length, truth determined if len != 0 return len != MP_OBJ_NEW_SMALL_INT(0); } else { // any other obj is true per Python semantics return 1; } } } bool mp_obj_is_callable(mp_obj_t o_in) { mp_call_fun_t call = mp_obj_get_type(o_in)->call; if (call != mp_obj_instance_call) { return call != NULL; } return mp_obj_instance_is_callable(o_in); } // This function implements the '==' operator (and so the inverse of '!='). // // From the Python language reference: // (https://docs.python.org/3/reference/expressions.html#not-in) // "The objects need not have the same type. If both are numbers, they are converted // to a common type. Otherwise, the == and != operators always consider objects of // different types to be unequal." // // This means that False==0 and True==1 are true expressions. // // Furthermore, from the v3.4.2 code for object.c: "Practical amendments: If rich // comparison returns NotImplemented, == and != are decided by comparing the object // pointer." bool mp_obj_equal(mp_obj_t o1, mp_obj_t o2) { if (o1 == o2) { return true; } if (o1 == mp_const_none || o2 == mp_const_none) { return false; } // fast path for small ints if (MP_OBJ_IS_SMALL_INT(o1)) { if (MP_OBJ_IS_SMALL_INT(o2)) { // both SMALL_INT, and not equal if we get here return false; } else { mp_obj_t temp = o2; o2 = o1; o1 = temp; // o2 is now the SMALL_INT, o1 is not // fall through to generic op } } // fast path for strings if (MP_OBJ_IS_STR(o1)) { if (MP_OBJ_IS_STR(o2)) { // both strings, use special function return mp_obj_str_equal(o1, o2); } else { // a string is never equal to anything else goto str_cmp_err; } } else if (MP_OBJ_IS_STR(o2)) { // o1 is not a string (else caught above), so the objects are not equal str_cmp_err: #if MICROPY_PY_STR_BYTES_CMP_WARN if (MP_OBJ_IS_TYPE(o1, &mp_type_bytes) || MP_OBJ_IS_TYPE(o2, &mp_type_bytes)) { mp_warning("Comparison between bytes and str"); } #endif return false; } // generic type, call binary_op(MP_BINARY_OP_EQUAL) mp_obj_type_t *type = mp_obj_get_type(o1); if (type->binary_op != NULL) { mp_obj_t r = type->binary_op(MP_BINARY_OP_EQUAL, o1, o2); if (r != MP_OBJ_NULL) { return r == mp_const_true ? true : false; } } // equality not implemented, and objects are not the same object, so // they are defined as not equal return false; } mp_int_t mp_obj_get_int(mp_const_obj_t arg) { // This function essentially performs implicit type conversion to int // Note that Python does NOT provide implicit type conversion from // float to int in the core expression language, try some_list[1.0]. if (arg == mp_const_false) { return 0; } else if (arg == mp_const_true) { return 1; } else if (MP_OBJ_IS_SMALL_INT(arg)) { return MP_OBJ_SMALL_INT_VALUE(arg); } else if (MP_OBJ_IS_TYPE(arg, &mp_type_int)) { return mp_obj_int_get_checked(arg); } else { if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) { mp_raise_msg(&mp_type_TypeError, "can't convert to int"); } else { nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "can't convert %s to int", mp_obj_get_type_str(arg))); } } } mp_int_t mp_obj_get_int_truncated(mp_const_obj_t arg) { if (MP_OBJ_IS_INT(arg)) { return mp_obj_int_get_truncated(arg); } else { return mp_obj_get_int(arg); } } // returns false if arg is not of integral type // returns true and sets *value if it is of integral type // can throw OverflowError if arg is of integral type, but doesn't fit in a mp_int_t bool mp_obj_get_int_maybe(mp_const_obj_t arg, mp_int_t *value) { if (arg == mp_const_false) { *value = 0; } else if (arg == mp_const_true) { *value = 1; } else if (MP_OBJ_IS_SMALL_INT(arg)) { *value = MP_OBJ_SMALL_INT_VALUE(arg); } else if (MP_OBJ_IS_TYPE(arg, &mp_type_int)) { *value = mp_obj_int_get_checked(arg); } else { return false; } return true; } #if MICROPY_PY_BUILTINS_FLOAT mp_float_t mp_obj_get_float(mp_obj_t arg) { if (arg == mp_const_false) { return 0; } else if (arg == mp_const_true) { return 1; } else if (MP_OBJ_IS_SMALL_INT(arg)) { return MP_OBJ_SMALL_INT_VALUE(arg); #if MICROPY_LONGINT_IMPL != MICROPY_LONGINT_IMPL_NONE } else if (MP_OBJ_IS_TYPE(arg, &mp_type_int)) { return mp_obj_int_as_float_impl(arg); #endif } else if (mp_obj_is_float(arg)) { return mp_obj_float_get(arg); } else { if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) { mp_raise_msg(&mp_type_TypeError, "can't convert to float"); } else { nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "can't convert %s to float", mp_obj_get_type_str(arg))); } } } #if MICROPY_PY_BUILTINS_COMPLEX void mp_obj_get_complex(mp_obj_t arg, mp_float_t *real, mp_float_t *imag) { if (arg == mp_const_false) { *real = 0; *imag = 0; } else if (arg == mp_const_true) { *real = 1; *imag = 0; } else if (MP_OBJ_IS_SMALL_INT(arg)) { *real = MP_OBJ_SMALL_INT_VALUE(arg); *imag = 0; #if MICROPY_LONGINT_IMPL != MICROPY_LONGINT_IMPL_NONE } else if (MP_OBJ_IS_TYPE(arg, &mp_type_int)) { *real = mp_obj_int_as_float_impl(arg); *imag = 0; #endif } else if (mp_obj_is_float(arg)) { *real = mp_obj_float_get(arg); *imag = 0; } else if (MP_OBJ_IS_TYPE(arg, &mp_type_complex)) { mp_obj_complex_get(arg, real, imag); } else { if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) { mp_raise_msg(&mp_type_TypeError, "can't convert to complex"); } else { nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "can't convert %s to complex", mp_obj_get_type_str(arg))); } } } #endif #endif // note: returned value in *items may point to the interior of a GC block void mp_obj_get_array(mp_obj_t o, mp_uint_t *len, mp_obj_t **items) { if (MP_OBJ_IS_TYPE(o, &mp_type_tuple)) { mp_obj_tuple_get(o, len, items); } else if (MP_OBJ_IS_TYPE(o, &mp_type_list)) { mp_obj_list_get(o, len, items); } else { if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) { mp_raise_msg(&mp_type_TypeError, "expected tuple/list"); } else { nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "object '%s' is not a tuple or list", mp_obj_get_type_str(o))); } } } // note: returned value in *items may point to the interior of a GC block void mp_obj_get_array_fixed_n(mp_obj_t o, mp_uint_t len, mp_obj_t **items) { mp_uint_t seq_len; mp_obj_get_array(o, &seq_len, items); if (seq_len != len) { if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) { mp_raise_msg(&mp_type_ValueError, "tuple/list has wrong length"); } else { nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "requested length %d but object has length %d", (int)len, (int)seq_len)); } } } // is_slice determines whether the index is a slice index size_t mp_get_index(const mp_obj_type_t *type, size_t len, mp_obj_t index, bool is_slice) { mp_int_t i; if (MP_OBJ_IS_SMALL_INT(index)) { i = MP_OBJ_SMALL_INT_VALUE(index); } else if (!mp_obj_get_int_maybe(index, &i)) { if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) { mp_raise_msg(&mp_type_TypeError, "indices must be integers"); } else { nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "%q indices must be integers, not %s", type->name, mp_obj_get_type_str(index))); } } if (i < 0) { i += len; } if (is_slice) { if (i < 0) { i = 0; } else if ((mp_uint_t)i > len) { i = len; } } else { if (i < 0 || (mp_uint_t)i >= len) { if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) { mp_raise_msg(&mp_type_IndexError, "index out of range"); } else { nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_IndexError, "%q index out of range", type->name)); } } } // By this point 0 <= i <= len and so fits in a size_t return (size_t)i; } mp_obj_t mp_obj_id(mp_obj_t o_in) { mp_int_t id = (mp_int_t)o_in; if (!MP_OBJ_IS_OBJ(o_in)) { return mp_obj_new_int(id); } else if (id >= 0) { // Many OSes and CPUs have affinity for putting "user" memories // into low half of address space, and "system" into upper half. // We're going to take advantage of that and return small int // (signed) for such "user" addresses. return MP_OBJ_NEW_SMALL_INT(id); } else { // If that didn't work, well, let's return long int, just as // a (big) positve value, so it will never clash with the range // of small int returned in previous case. return mp_obj_new_int_from_uint((mp_uint_t)id); } } // will raise a TypeError if object has no length mp_obj_t mp_obj_len(mp_obj_t o_in) { mp_obj_t len = mp_obj_len_maybe(o_in); if (len == MP_OBJ_NULL) { if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) { mp_raise_msg(&mp_type_TypeError, "object has no len"); } else { nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "object of type '%s' has no len()", mp_obj_get_type_str(o_in))); } } else { return len; } } // may return MP_OBJ_NULL mp_obj_t mp_obj_len_maybe(mp_obj_t o_in) { if ( #if !MICROPY_PY_BUILTINS_STR_UNICODE // It's simple - unicode is slow, non-unicode is fast MP_OBJ_IS_STR(o_in) || #endif MP_OBJ_IS_TYPE(o_in, &mp_type_bytes)) { GET_STR_LEN(o_in, l); return MP_OBJ_NEW_SMALL_INT(l); } else { mp_obj_type_t *type = mp_obj_get_type(o_in); if (type->unary_op != NULL) { return type->unary_op(MP_UNARY_OP_LEN, o_in); } else { return MP_OBJ_NULL; } } } mp_obj_t mp_obj_subscr(mp_obj_t base, mp_obj_t index, mp_obj_t value) { mp_obj_type_t *type = mp_obj_get_type(base); if (type->subscr != NULL) { mp_obj_t ret = type->subscr(base, index, value); if (ret != MP_OBJ_NULL) { return ret; } // TODO: call base classes here? } if (value == MP_OBJ_NULL) { if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) { mp_raise_msg(&mp_type_TypeError, "object does not support item deletion"); } else { nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "'%s' object does not support item deletion", mp_obj_get_type_str(base))); } } else if (value == MP_OBJ_SENTINEL) { if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) { nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "object is not subscriptable")); } else { nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "'%s' object is not subscriptable", mp_obj_get_type_str(base))); } } else { if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) { mp_raise_msg(&mp_type_TypeError, "object does not support item assignment"); } else { nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "'%s' object does not support item assignment", mp_obj_get_type_str(base))); } } } // Return input argument. Useful as .getiter for objects which are // their own iterators, etc. mp_obj_t mp_identity(mp_obj_t self) { return self; } MP_DEFINE_CONST_FUN_OBJ_1(mp_identity_obj, mp_identity); mp_obj_t mp_identity_getiter(mp_obj_t self, mp_obj_iter_buf_t *iter_buf) { (void)iter_buf; return self; } bool mp_get_buffer(mp_obj_t obj, mp_buffer_info_t *bufinfo, mp_uint_t flags) { mp_obj_type_t *type = mp_obj_get_type(obj); if (type->buffer_p.get_buffer == NULL) { return false; } int ret = type->buffer_p.get_buffer(obj, bufinfo, flags); if (ret != 0) { return false; } return true; } void mp_get_buffer_raise(mp_obj_t obj, mp_buffer_info_t *bufinfo, mp_uint_t flags) { if (!mp_get_buffer(obj, bufinfo, flags)) { mp_raise_msg(&mp_type_TypeError, "object with buffer protocol required"); } } mp_obj_t mp_generic_unary_op(mp_uint_t op, mp_obj_t o_in) { switch (op) { case MP_UNARY_OP_HASH: return MP_OBJ_NEW_SMALL_INT((mp_uint_t)o_in); default: return MP_OBJ_NULL; // op not supported } }