add circuitpython code

2 files changed, 536 insertions, 0 deletions

diff --git a/circuitpython/shared-module/msgpack/__init__.c b/circuitpython/shared-module/msgpack/__init__.c
new file mode 100644
index 0000000..e1b98a9
--- /dev/null
+++ b/circuitpython/shared-module/msgpack/__init__.c
@@ -0,0 +1,502 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019  Bernhard Boser
+ *
+ * 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 <stdio.h>
+#include <inttypes.h>
+
+#include "py/obj.h"
+#include "py/binary.h"
+#include "py/objarray.h"
+#include "py/objlist.h"
+#include "py/objstringio.h"
+#include "py/parsenum.h"
+#include "py/runtime.h"
+#include "py/stream.h"
+
+#include "supervisor/shared/translate.h"
+#include "shared-bindings/msgpack/ExtType.h"
+#include "shared-bindings/msgpack/__init__.h"
+#include "shared-module/msgpack/__init__.h"
+
+////////////////////////////////////////////////////////////////
+// stream management
+
+typedef struct _msgpack_stream_t {
+    mp_obj_t stream_obj;
+    mp_uint_t (*read)(mp_obj_t obj, void *buf, mp_uint_t size, int *errcode);
+    mp_uint_t (*write)(mp_obj_t obj, const void *buf, mp_uint_t size, int *errcode);
+    int errcode;
+} msgpack_stream_t;
+
+STATIC msgpack_stream_t get_stream(mp_obj_t stream_obj, int flags) {
+    const mp_stream_p_t *stream_p = mp_get_stream_raise(stream_obj, flags);
+    msgpack_stream_t s = {stream_obj, stream_p->read, stream_p->write, 0};
+    return s;
+}
+
+////////////////////////////////////////////////////////////////
+// readers
+
+STATIC void read(msgpack_stream_t *s, void *buf, mp_uint_t size) {
+    if (size == 0) {
+        return;
+    }
+    mp_uint_t ret = s->read(s->stream_obj, buf, size, &s->errcode);
+    if (s->errcode != 0) {
+        mp_raise_OSError(s->errcode);
+    }
+    if (ret == 0) {
+        mp_raise_msg(&mp_type_EOFError, NULL);
+    }
+    if (ret < size) {
+        mp_raise_ValueError(translate("short read"));
+    }
+}
+
+STATIC uint8_t read1(msgpack_stream_t *s) {
+    uint8_t res = 0;
+    read(s, &res, 1);
+    return res;
+}
+
+STATIC uint16_t read2(msgpack_stream_t *s) {
+    uint16_t res = 0;
+    read(s, &res, 2);
+    int n = 1;
+    if (*(char *)&n == 1) {
+        res = __builtin_bswap16(res);
+    }
+    return res;
+}
+
+STATIC uint32_t read4(msgpack_stream_t *s) {
+    uint32_t res = 0;
+    read(s, &res, 4);
+    int n = 1;
+    if (*(char *)&n == 1) {
+        res = __builtin_bswap32(res);
+    }
+    return res;
+}
+
+STATIC size_t read_size(msgpack_stream_t *s, uint8_t len_index) {
+    size_t res = 0;
+    switch (len_index) {
+        case 0:
+            res = (size_t)read1(s);
+            break;
+        case 1:
+            res = (size_t)read2(s);
+            break;
+        case 2:
+            res = (size_t)read4(s);
+            break;
+    }
+    return res;
+}
+
+////////////////////////////////////////////////////////////////
+// writers
+
+STATIC void write(msgpack_stream_t *s, const void *buf, mp_uint_t size) {
+    mp_uint_t ret = s->write(s->stream_obj, buf, size, &s->errcode);
+    if (s->errcode != 0) {
+        mp_raise_OSError(s->errcode);
+    }
+    if (ret == 0) {
+        mp_raise_msg(&mp_type_EOFError, NULL);
+    }
+}
+
+STATIC void write1(msgpack_stream_t *s, uint8_t obj) {
+    write(s, &obj, 1);
+}
+
+STATIC void write2(msgpack_stream_t *s, uint16_t obj) {
+    int n = 1;
+    if (*(char *)&n == 1) {
+        obj = __builtin_bswap16(obj);
+    }
+    write(s, &obj, 2);
+}
+
+STATIC void write4(msgpack_stream_t *s, uint32_t obj) {
+    int n = 1;
+    if (*(char *)&n == 1) {
+        obj = __builtin_bswap32(obj);
+    }
+    write(s, &obj, 4);
+}
+
+// compute and write msgpack size code (array structures)
+STATIC void write_size(msgpack_stream_t *s, uint8_t code, size_t size) {
+    if ((uint8_t)size == size) {
+        write1(s, code);
+        write1(s, size);
+    } else if ((uint16_t)size == size) {
+        write1(s, code + 1);
+        write2(s, size);
+    } else {
+        write1(s, code + 2);
+        write4(s, size);
+    }
+}
+
+////////////////////////////////////////////////////////////////
+// packers
+
+// This is a helper function to iterate through a dictionary.  The state of
+// the iteration is held in *cur and should be initialised with zero for the
+// first call.  Will return NULL when no more elements are available.
+STATIC mp_map_elem_t *dict_iter_next(mp_obj_dict_t *dict, size_t *cur) {
+    size_t max = dict->map.alloc;
+    mp_map_t *map = &dict->map;
+
+    for (size_t i = *cur; i < max; i++) {
+        if (mp_map_slot_is_filled(map, i)) {
+            *cur = i + 1;
+            return &(map->table[i]);
+        }
+    }
+
+    return NULL;
+}
+
+STATIC void pack_int(msgpack_stream_t *s, int32_t x) {
+    if (x > -32 && x < 128) {
+        write1(s, x);
+    } else if ((int8_t)x == x) {
+        write1(s, 0xd0);
+        write1(s, x);
+    } else if ((int16_t)x == x) {
+        write1(s, 0xd1);
+        write2(s, x);
+    } else {
+        write1(s, 0xd2);
+        write4(s, x);
+    }
+}
+
+STATIC void pack_bin(msgpack_stream_t *s, const uint8_t *data, size_t len) {
+    write_size(s, 0xc4, len);
+    if (len > 0) {
+        write(s, data, len);
+    }
+}
+
+STATIC void  pack_ext(msgpack_stream_t *s, int8_t code, const uint8_t *data, size_t len) {
+    if (len == 1) {
+        write1(s, 0xd4);
+    } else if (len == 2) {
+        write1(s, 0xd5);
+    } else if (len == 4) {
+        write1(s, 0xd6);
+    } else if (len == 8) {
+        write1(s, 0xd7);
+    } else if (len == 16) {
+        write1(s, 0xd8);
+    } else {
+        write_size(s, 0xc7, len);
+    }
+    write1(s, code);    // type byte
+    if (len > 0) {
+        write(s, data, len);
+    }
+}
+
+STATIC void pack_str(msgpack_stream_t *s, const char *str, size_t len) {
+    if (len < 32) {
+        write1(s, 0b10100000 | (uint8_t)len);
+    } else {
+        write_size(s, 0xd9, len);
+    }
+    if (len > 0) {
+        write(s, str, len);
+    }
+}
+
+STATIC void pack_array(msgpack_stream_t *s, size_t len) {
+    // only writes the header, manually write the objects after calling pack_array!
+    if (len < 16) {
+        write1(s, 0b10010000 | (uint8_t)len);
+    } else if (len < 0x10000) {
+        write1(s, 0xdc);
+        write2(s, len);
+    } else {
+        write1(s, 0xdd);
+        write4(s, len);
+    }
+}
+
+STATIC void pack_dict(msgpack_stream_t *s, size_t len) {
+    // only writes the header, manually write the objects after calling pack_array!
+    if (len < 16) {
+        write1(s, 0b10000000 | (uint8_t)len);
+    } else if (len < 0x10000) {
+        write1(s, 0xde);
+        write2(s, len);
+    } else {
+        write1(s, 0xdf);
+        write4(s, len);
+    }
+}
+
+STATIC void pack(mp_obj_t obj, msgpack_stream_t *s, mp_obj_t default_handler) {
+    if (mp_obj_is_small_int(obj)) {
+        // int
+        int32_t x = MP_OBJ_SMALL_INT_VALUE(obj);
+        pack_int(s, x);
+    } else if (mp_obj_is_str(obj)) {
+        // string
+        size_t len;
+        const char *data = mp_obj_str_get_data(obj, &len);
+        pack_str(s, data, len);
+    } else if (mp_obj_is_type(obj, &mod_msgpack_exttype_type)) {
+        mod_msgpack_extype_obj_t *ext = MP_OBJ_TO_PTR(obj);
+        mp_buffer_info_t bufinfo;
+        mp_get_buffer_raise(ext->data, &bufinfo, MP_BUFFER_READ);
+        pack_ext(s, ext->code, bufinfo.buf, bufinfo.len);
+    } else if (mp_obj_is_type(obj, &mp_type_tuple)) {
+        // tuple
+        mp_obj_tuple_t *self = MP_OBJ_TO_PTR(obj);
+        pack_array(s, self->len);
+        for (size_t i = 0; i < self->len; i++) {
+            pack(self->items[i], s, default_handler);
+        }
+    } else if (mp_obj_is_type(obj, &mp_type_list)) {
+        // list (layout differs from tuple)
+        mp_obj_list_t *self = MP_OBJ_TO_PTR(obj);
+        pack_array(s, self->len);
+        for (size_t i = 0; i < self->len; i++) {
+            pack(self->items[i], s, default_handler);
+        }
+    } else if (mp_obj_is_type(obj, &mp_type_dict)) {
+        // dict
+        mp_obj_dict_t *self = MP_OBJ_TO_PTR(obj);
+        pack_dict(s, self->map.used);
+        size_t cur = 0;
+        mp_map_elem_t *next = NULL;
+        while ((next = dict_iter_next(self, &cur)) != NULL) {
+            pack(next->key, s, default_handler);
+            pack(next->value, s, default_handler);
+        }
+    } else if (mp_obj_is_float(obj)) {
+        union Float { mp_float_t f;
+                      uint32_t u;
+        };
+        union Float data;
+        data.f = mp_obj_float_get(obj);
+        write1(s, 0xca);
+        write4(s, data.u);
+    } else if (obj == mp_const_none) {
+        write1(s, 0xc0);
+    } else if (obj == mp_const_false) {
+        write1(s, 0xc2);
+    } else if (obj == mp_const_true) {
+        write1(s, 0xc3);
+    } else {
+        mp_buffer_info_t bufinfo;
+        if (mp_get_buffer(obj, &bufinfo, MP_BUFFER_READ)) {
+            // bytes (bin type)
+            pack_bin(s, bufinfo.buf, bufinfo.len);
+        } else if (default_handler != mp_const_none) {
+            // set default_handler to mp_const_none to avoid infinite recursion
+            // this also precludes some valid outputs
+            pack(mp_call_function_1(default_handler, obj), s, mp_const_none);
+        } else {
+            mp_raise_ValueError(translate("no default packer"));
+        }
+    }
+}
+
+////////////////////////////////////////////////////////////////
+// unpacker
+
+STATIC mp_obj_t unpack(msgpack_stream_t *s, mp_obj_t ext_hook, bool use_list);
+
+STATIC mp_obj_t unpack_array_elements(msgpack_stream_t *s, size_t size, mp_obj_t ext_hook, bool use_list) {
+    if (use_list) {
+        mp_obj_list_t *t = MP_OBJ_TO_PTR(mp_obj_new_list(size, NULL));
+        for (size_t i = 0; i < size; i++) {
+            t->items[i] = unpack(s, ext_hook, use_list);
+        }
+        return MP_OBJ_FROM_PTR(t);
+    } else {
+        mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(size, NULL));
+        for (size_t i = 0; i < size; i++) {
+            t->items[i] = unpack(s, ext_hook, use_list);
+        }
+        return MP_OBJ_FROM_PTR(t);
+    }
+}
+
+STATIC mp_obj_t unpack_bytes(msgpack_stream_t *s, size_t size) {
+    vstr_t vstr;
+    vstr_init_len(&vstr, size);
+    byte *p = (byte *)vstr.buf;
+    // read in chunks: (some drivers - e.g. UART) limit the
+    // maximum number of bytes that can be read at once
+    // read(s, p, size);
+    while (size > 0) {
+        int n = size > 256 ? 256 : size;
+        read(s, p, n);
+        size -= n;
+        p += n;
+    }
+    return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
+}
+
+STATIC mp_obj_t unpack_ext(msgpack_stream_t *s, size_t size, mp_obj_t ext_hook) {
+    int8_t code = read1(s);
+    mp_obj_t data = unpack_bytes(s, size);
+    if (ext_hook != mp_const_none) {
+        return mp_call_function_2(ext_hook, MP_OBJ_NEW_SMALL_INT(code), data);
+    } else {
+        mod_msgpack_extype_obj_t *o = m_new_obj(mod_msgpack_extype_obj_t);
+        o->base.type = &mod_msgpack_exttype_type;
+        o->code = code;
+        o->data = data;
+        return MP_OBJ_FROM_PTR(o);
+    }
+}
+
+STATIC mp_obj_t unpack(msgpack_stream_t *s, mp_obj_t ext_hook, bool use_list) {
+    uint8_t code = read1(s);
+    if (((code & 0b10000000) == 0) || ((code & 0b11100000) == 0b11100000)) {
+        // int
+        return MP_OBJ_NEW_SMALL_INT((int8_t)code);
+    }
+    if ((code & 0b11100000) == 0b10100000) {
+        // str
+        size_t len = code & 0b11111;
+        // allocate on stack; len < 32
+        char str[len];
+        read(s, &str, len);
+        return mp_obj_new_str(str, len);
+    }
+    if ((code & 0b11110000) == 0b10010000) {
+        // array (list / tuple)
+        return unpack_array_elements(s, code & 0b1111, ext_hook, use_list);
+    }
+    if ((code & 0b11110000) == 0b10000000) {
+        // map (dict)
+        size_t len = code & 0b1111;
+        mp_obj_dict_t *d = MP_OBJ_TO_PTR(mp_obj_new_dict(len));
+        for (size_t i = 0; i < len; i++) {
+            mp_obj_dict_store(d, unpack(s, ext_hook, use_list), unpack(s, ext_hook, use_list));
+        }
+        return MP_OBJ_FROM_PTR(d);
+    }
+    switch (code) {
+        case 0xc0:
+            return mp_const_none;
+        case 0xc2:
+            return mp_const_false;
+        case 0xc3:
+            return mp_const_true;
+        case 0xc4:
+        case 0xc5:
+        case 0xc6: {
+            // bin 8, 16, 32
+            return unpack_bytes(s, read_size(s, code - 0xc4));
+        }
+        case 0xcc: // uint8
+        case 0xd0: // int8
+            return MP_OBJ_NEW_SMALL_INT((int8_t)read1(s));
+        case 0xcd: // uint16
+        case 0xd1: // int16
+            return MP_OBJ_NEW_SMALL_INT((int16_t)read2(s));
+        case 0xce: // uint32
+        case 0xd2: // int32
+            return MP_OBJ_NEW_SMALL_INT((int32_t)read4(s));
+        case 0xca: {
+            union Float { mp_float_t f;
+                          uint32_t u;
+            };
+            union Float data;
+            data.u = read4(s);
+            return mp_obj_new_float(data.f);
+        }
+        case 0xd9:
+        case 0xda:
+        case 0xdb: {
+            // str 8, 16, 32
+            size_t size = read_size(s, code - 0xd9);
+            vstr_t vstr;
+            vstr_init_len(&vstr, size);
+            byte *p = (byte *)vstr.buf;
+            read(s, p, size);
+            return mp_obj_new_str_from_vstr(&mp_type_str, &vstr);
+        }
+        case 0xde:
+        case 0xdf: {
+            // map 16 & 32
+            size_t len = read_size(s, code - 0xde + 1);
+            mp_obj_dict_t *d = MP_OBJ_TO_PTR(mp_obj_new_dict(len));
+            for (size_t i = 0; i < len; i++) {
+                mp_obj_dict_store(d, unpack(s, ext_hook, use_list), unpack(s, ext_hook, use_list));
+            }
+            return MP_OBJ_FROM_PTR(d);
+        }
+        case 0xdc:
+        case 0xdd: {
+            // array 16 & 32
+            size_t size = read_size(s, code - 0xdc + 1);
+            return unpack_array_elements(s, size, ext_hook, use_list);
+        }
+        case 0xd4:      // fixenxt 1
+            return unpack_ext(s, 1, ext_hook);
+        case 0xd5:      // fixenxt 2
+            return unpack_ext(s, 2, ext_hook);
+        case 0xd6:      // fixenxt 4
+            return unpack_ext(s, 4, ext_hook);
+        case 0xd7:      // fixenxt 8
+            return unpack_ext(s, 8, ext_hook);
+        case 0xd8:      // fixenxt 16
+            return unpack_ext(s, 16, ext_hook);
+        case 0xc7:      // ext 8
+        case 0xc8:      // ext 16
+        case 0xc9:
+            // ext 8, 16, 32
+            return unpack_ext(s, read_size(s, code - 0xc7), ext_hook);
+        case 0xc1:      // never used
+        case 0xcb:      // float 64
+        case 0xcf:      // uint 64
+        case 0xd3:      // int 64
+        default:
+            mp_raise_NotImplementedError(translate("64 bit types"));
+    }
+}
+
+void common_hal_msgpack_pack(mp_obj_t obj, mp_obj_t stream_obj, mp_obj_t default_handler) {
+    msgpack_stream_t stream = get_stream(stream_obj, MP_STREAM_OP_WRITE);
+    pack(obj, &stream, default_handler);
+}
+
+mp_obj_t common_hal_msgpack_unpack(mp_obj_t stream_obj, mp_obj_t ext_hook, bool use_list) {
+    msgpack_stream_t stream = get_stream(stream_obj, MP_STREAM_OP_READ);
+    return unpack(&stream, ext_hook, use_list);
+}
diff --git a/circuitpython/shared-module/msgpack/__init__.h b/circuitpython/shared-module/msgpack/__init__.h
new file mode 100644
index 0000000..88b4809
--- /dev/null
+++ b/circuitpython/shared-module/msgpack/__init__.h
@@ -0,0 +1,34 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
+ *
+ * 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.
+ */
+#ifndef MICROPY_INCLUDED_SHARED_MODULE_MSGPACK___INIT___H
+#define MICROPY_INCLUDED_SHARED_MODULE_MSGPACK___INIT___H
+
+#include "py/stream.h"
+
+void common_hal_msgpack_pack(mp_obj_t obj, mp_obj_t stream_obj, mp_obj_t default_handler);
+mp_obj_t common_hal_msgpack_unpack(mp_obj_t stream_obj, mp_obj_t ext_hook, bool use_list);
+
+#endif