add circuitpython code

1 files changed, 275 insertions, 0 deletions

diff --git a/circuitpython/py/misc.h b/circuitpython/py/misc.h
new file mode 100644
index 0000000..8f2d3a1
--- /dev/null
+++ b/circuitpython/py/misc.h
@@ -0,0 +1,275 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * SPDX-FileCopyrightText: 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.
+ */
+#ifndef MICROPY_INCLUDED_PY_MISC_H
+#define MICROPY_INCLUDED_PY_MISC_H
+
+// a mini library of useful types and functions
+
+/** types *******************************************************/
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stddef.h>
+
+#include "mpconfig.h"
+
+typedef unsigned char byte;
+typedef unsigned int uint;
+
+/** generic ops *************************************************/
+
+#ifndef MIN
+#define MIN(x, y) ((x) < (y) ? (x) : (y))
+#endif
+#ifndef MAX
+#define MAX(x, y) ((x) > (y) ? (x) : (y))
+#endif
+
+// Classical double-indirection stringification of preprocessor macro's value
+#define MP_STRINGIFY_HELPER(x) #x
+#define MP_STRINGIFY(x) MP_STRINGIFY_HELPER(x)
+
+// Static assertion macro
+#define MP_STATIC_ASSERT(cond) ((void)sizeof(char[1 - 2 * !(cond)]))
+
+// Round-up integer division
+#define MP_CEIL_DIVIDE(a, b) (((a) + (b) - 1) / (b))
+#define MP_ROUND_DIVIDE(a, b) (((a) + (b) / 2) / (b))
+
+/** memory allocation ******************************************/
+
+// TODO make a lazy m_renew that can increase by a smaller amount than requested (but by at least 1 more element)
+
+#define m_new(type, num) ((type *)(m_malloc(sizeof(type) * (num), false)))
+#define m_new_ll(type, num) ((type *)(m_malloc(sizeof(type) * (num), true)))
+#define m_new_maybe(type, num) ((type *)(m_malloc_maybe(sizeof(type) * (num), false)))
+#define m_new_ll_maybe(type, num) ((type *)(m_malloc_maybe(sizeof(type) * (num), true)))
+#define m_new0(type, num) ((type *)(m_malloc0(sizeof(type) * (num), false)))
+#define m_new0_ll(type, num) ((type *)(m_malloc0(sizeof(type) * (num), true)))
+#define m_new_obj(type) (m_new(type, 1))
+#define m_new_ll_obj(type) (m_new_ll(type, 1))
+#define m_new_obj_maybe(type) (m_new_maybe(type, 1))
+#define m_new_obj_var(obj_type, var_type, var_num) ((obj_type *)m_malloc(sizeof(obj_type) + sizeof(var_type) * (var_num), false))
+#define m_new_obj_var_maybe(obj_type, var_type, var_num) ((obj_type *)m_malloc_maybe(sizeof(obj_type) + sizeof(var_type) * (var_num), false))
+#define m_new_ll_obj_var_maybe(obj_type, var_type, var_num) ((obj_type *)m_malloc_maybe(sizeof(obj_type) + sizeof(var_type) * (var_num), true))
+#if MICROPY_ENABLE_FINALISER
+#define m_new_obj_with_finaliser(type) ((type *)(m_malloc_with_finaliser(sizeof(type), false)))
+#define m_new_obj_var_with_finaliser(type, var_type, var_num) ((type *)m_malloc_with_finaliser(sizeof(type) + sizeof(var_type) * (var_num), false))
+#define m_new_ll_obj_with_finaliser(type) ((type *)(m_malloc_with_finaliser(sizeof(type), true)))
+#else
+#define m_new_obj_with_finaliser(type) m_new_obj(type)
+#define m_new_obj_var_with_finaliser(type, var_type, var_num) m_new_obj_var(type, var_type, var_num)
+#define m_new_ll_obj_with_finaliser(type) m_new_ll_obj(type)
+#endif
+#if MICROPY_MALLOC_USES_ALLOCATED_SIZE
+#define m_renew(type, ptr, old_num, new_num) ((type *)(m_realloc((ptr), sizeof(type) * (old_num), sizeof(type) * (new_num))))
+#define m_renew_maybe(type, ptr, old_num, new_num, allow_move) ((type *)(m_realloc_maybe((ptr), sizeof(type) * (old_num), sizeof(type) * (new_num), (allow_move))))
+#define m_del(type, ptr, num) m_free(ptr, sizeof(type) * (num))
+#define m_del_var(obj_type, var_type, var_num, ptr) (m_free(ptr, sizeof(obj_type) + sizeof(var_type) * (var_num)))
+#else
+#define m_renew(type, ptr, old_num, new_num) ((type *)(m_realloc((ptr), sizeof(type) * (new_num))))
+#define m_renew_maybe(type, ptr, old_num, new_num, allow_move) ((type *)(m_realloc_maybe((ptr), sizeof(type) * (new_num), (allow_move))))
+#define m_del(type, ptr, num) ((void)(num), m_free(ptr))
+#define m_del_var(obj_type, var_type, var_num, ptr) ((void)(var_num), m_free(ptr))
+#endif
+#define m_del_obj(type, ptr) (m_del(type, ptr, 1))
+
+void *m_malloc(size_t num_bytes, bool long_lived);
+void *m_malloc_maybe(size_t num_bytes, bool long_lived);
+void *m_malloc_with_finaliser(size_t num_bytes, bool long_lived);
+void *m_malloc0(size_t num_bytes, bool long_lived);
+#if MICROPY_MALLOC_USES_ALLOCATED_SIZE
+void *m_realloc(void *ptr, size_t old_num_bytes, size_t new_num_bytes);
+void *m_realloc_maybe(void *ptr, size_t old_num_bytes, size_t new_num_bytes, bool allow_move);
+void m_free(void *ptr, size_t num_bytes);
+#else
+void *m_realloc(void *ptr, size_t new_num_bytes);
+void *m_realloc_maybe(void *ptr, size_t new_num_bytes, bool allow_move);
+void m_free(void *ptr);
+#endif
+NORETURN void m_malloc_fail(size_t num_bytes);
+
+#if MICROPY_MEM_STATS
+size_t m_get_total_bytes_allocated(void);
+size_t m_get_current_bytes_allocated(void);
+size_t m_get_peak_bytes_allocated(void);
+#endif
+
+/** array helpers ***********************************************/
+
+// get the number of elements in a fixed-size array
+#define MP_ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
+
+// align ptr to the nearest multiple of "alignment"
+#define MP_ALIGN(ptr, alignment) (void *)(((uintptr_t)(ptr) + ((alignment) - 1)) & ~((alignment) - 1))
+
+#define sizeof_field(TYPE, MEMBER) sizeof((((TYPE *)0)->MEMBER))
+
+/** unichar / UTF-8 *********************************************/
+
+#if MICROPY_PY_BUILTINS_STR_UNICODE
+// with unicode enabled we need a type which can fit chars up to 0x10ffff
+typedef uint32_t unichar;
+#else
+// without unicode enabled we can only need to fit chars up to 0xff
+// (on 16-bit archs uint is 16-bits and more efficient than uint32_t)
+typedef uint unichar;
+#endif
+
+#if MICROPY_PY_BUILTINS_STR_UNICODE
+unichar utf8_get_char(const byte *s);
+const byte *utf8_next_char(const byte *s);
+size_t utf8_charlen(const byte *str, size_t len);
+#else
+static inline unichar utf8_get_char(const byte *s) {
+    return *s;
+}
+static inline const byte *utf8_next_char(const byte *s) {
+    return s + 1;
+}
+static inline size_t utf8_charlen(const byte *str, size_t len) {
+    (void)str;
+    return len;
+}
+#endif
+
+bool unichar_isspace(unichar c);
+bool unichar_isalpha(unichar c);
+bool unichar_isprint(unichar c);
+bool unichar_isdigit(unichar c);
+bool unichar_isxdigit(unichar c);
+bool unichar_isident(unichar c);
+bool unichar_isalnum(unichar c);
+bool unichar_isupper(unichar c);
+bool unichar_islower(unichar c);
+unichar unichar_tolower(unichar c);
+unichar unichar_toupper(unichar c);
+mp_uint_t unichar_xdigit_value(unichar c);
+#define UTF8_IS_NONASCII(ch) ((ch) & 0x80)
+#define UTF8_IS_CONT(ch) (((ch) & 0xC0) == 0x80)
+
+/** variable string *********************************************/
+
+typedef struct _vstr_t {
+    size_t alloc;
+    size_t len;
+    char *buf;
+    bool fixed_buf : 1;
+} vstr_t;
+
+// convenience macro to declare a vstr with a fixed size buffer on the stack
+#define VSTR_FIXED(vstr, alloc) vstr_t vstr; char vstr##_buf[(alloc)]; vstr_init_fixed_buf(&vstr, (alloc), vstr##_buf);
+
+void vstr_init(vstr_t *vstr, size_t alloc);
+void vstr_init_len(vstr_t *vstr, size_t len);
+void vstr_init_fixed_buf(vstr_t *vstr, size_t alloc, char *buf);
+struct _mp_print_t;
+void vstr_init_print(vstr_t *vstr, size_t alloc, struct _mp_print_t *print);
+void vstr_clear(vstr_t *vstr);
+vstr_t *vstr_new(size_t alloc);
+void vstr_free(vstr_t *vstr);
+static inline void vstr_reset(vstr_t *vstr) {
+    vstr->len = 0;
+}
+static inline char *vstr_str(vstr_t *vstr) {
+    return vstr->buf;
+}
+static inline size_t vstr_len(vstr_t *vstr) {
+    return vstr->len;
+}
+void vstr_hint_size(vstr_t *vstr, size_t size);
+char *vstr_extend(vstr_t *vstr, size_t size);
+char *vstr_add_len(vstr_t *vstr, size_t len);
+char *vstr_null_terminated_str(vstr_t *vstr);
+void vstr_add_byte(vstr_t *vstr, byte v);
+void vstr_add_char(vstr_t *vstr, unichar chr);
+void vstr_add_str(vstr_t *vstr, const char *str);
+void vstr_add_strn(vstr_t *vstr, const char *str, size_t len);
+void vstr_ins_byte(vstr_t *vstr, size_t byte_pos, byte b);
+void vstr_ins_char(vstr_t *vstr, size_t char_pos, unichar chr);
+void vstr_cut_head_bytes(vstr_t *vstr, size_t bytes_to_cut);
+void vstr_cut_tail_bytes(vstr_t *vstr, size_t bytes_to_cut);
+void vstr_cut_out_bytes(vstr_t *vstr, size_t byte_pos, size_t bytes_to_cut);
+void vstr_printf(vstr_t *vstr, const char *fmt, ...);
+
+/** non-dynamic size-bounded variable buffer/string *************/
+
+#define CHECKBUF(buf, max_size) char buf[max_size + 1]; size_t buf##_len = max_size; char *buf##_p = buf;
+#define CHECKBUF_RESET(buf, max_size) buf##_len = max_size; buf##_p = buf;
+#define CHECKBUF_APPEND(buf, src, src_len) \
+    { size_t l = MIN(src_len, buf##_len); \
+      memcpy(buf##_p, src, l); \
+      buf##_len -= l; \
+      buf##_p += l; }
+#define CHECKBUF_APPEND_0(buf) { *buf##_p = 0; }
+#define CHECKBUF_LEN(buf) (buf##_p - buf)
+
+#ifdef va_start
+void vstr_vprintf(vstr_t *vstr, const char *fmt, va_list ap);
+#endif
+
+// Debugging helpers
+int DEBUG_printf(const char *fmt, ...);
+
+extern mp_uint_t mp_verbose_flag;
+
+/** float internals *************/
+
+#if MICROPY_PY_BUILTINS_FLOAT
+
+#if MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_DOUBLE
+#define MP_FLOAT_EXP_BITS (11)
+#define MP_FLOAT_FRAC_BITS (52)
+typedef uint64_t mp_float_uint_t;
+#elif MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_FLOAT
+#define MP_FLOAT_EXP_BITS (8)
+#define MP_FLOAT_FRAC_BITS (23)
+typedef uint32_t mp_float_uint_t;
+#endif
+
+#define MP_FLOAT_EXP_BIAS ((1 << (MP_FLOAT_EXP_BITS - 1)) - 1)
+
+typedef union _mp_float_union_t {
+    mp_float_t f;
+    #if MP_ENDIANNESS_LITTLE
+    struct {
+        mp_float_uint_t frc : MP_FLOAT_FRAC_BITS;
+        mp_float_uint_t exp : MP_FLOAT_EXP_BITS;
+        mp_float_uint_t sgn : 1;
+    } p;
+    #else
+    struct {
+        mp_float_uint_t sgn : 1;
+        mp_float_uint_t exp : MP_FLOAT_EXP_BITS;
+        mp_float_uint_t frc : MP_FLOAT_FRAC_BITS;
+    } p;
+    #endif
+    mp_float_uint_t i;
+} mp_float_union_t;
+
+#endif // MICROPY_PY_BUILTINS_FLOAT
+
+#endif // MICROPY_INCLUDED_PY_MISC_H