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py/objstr: Add hex/fromhex to bytes/memoryview/bytearray.

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These were added in Python 3.5.

Enabled via MICROPY_PY_BUILTINS_BYTES_HEX, and enabled by default for all
ports that currently have ubinascii.

Rework ubinascii to use the implementation of these methods.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
This commit is contained in:
Jim Mussared
2021-07-13 18:01:12 +10:00
parent 6c67fbc280
commit 28aaab9590
13 changed files with 138 additions and 70 deletions
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98
py/objstr.c
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@@ -1950,6 +1950,84 @@ STATIC mp_obj_t str_encode(size_t n_args, const mp_obj_t *args) {
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(str_encode_obj, 1, 3, str_encode);
#endif
#if MICROPY_PY_BUILTINS_BYTES_HEX
mp_obj_t mp_obj_bytes_hex(size_t n_args, const mp_obj_t *args, const mp_obj_type_t *type) {
// First argument is the data to convert.
// Second argument is an optional separator to be used between values.
const char *sep = NULL;
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(args[0], &bufinfo, MP_BUFFER_READ);
// Code below assumes non-zero buffer length when computing size with
// separator, so handle the zero-length case here.
if (bufinfo.len == 0) {
return mp_const_empty_bytes;
}
vstr_t vstr;
size_t out_len = bufinfo.len * 2;
if (n_args > 1) {
// 1-char separator between hex numbers
out_len += bufinfo.len - 1;
sep = mp_obj_str_get_str(args[1]);
}
vstr_init_len(&vstr, out_len);
byte *in = bufinfo.buf, *out = (byte *)vstr.buf;
for (mp_uint_t i = bufinfo.len; i--;) {
byte d = (*in >> 4);
if (d > 9) {
d += 'a' - '9' - 1;
}
*out++ = d + '0';
d = (*in++ & 0xf);
if (d > 9) {
d += 'a' - '9' - 1;
}
*out++ = d + '0';
if (sep != NULL && i != 0) {
*out++ = *sep;
}
}
return mp_obj_new_str_from_vstr(type, &vstr);
}
mp_obj_t mp_obj_bytes_fromhex(mp_obj_t type_in, mp_obj_t data) {
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(data, &bufinfo, MP_BUFFER_READ);
if ((bufinfo.len & 1) != 0) {
mp_raise_ValueError(MP_ERROR_TEXT("odd-length string"));
}
vstr_t vstr;
vstr_init_len(&vstr, bufinfo.len / 2);
byte *in = bufinfo.buf, *out = (byte *)vstr.buf;
byte hex_byte = 0;
for (mp_uint_t i = bufinfo.len; i--;) {
byte hex_ch = *in++;
if (unichar_isxdigit(hex_ch)) {
hex_byte += unichar_xdigit_value(hex_ch);
} else {
mp_raise_ValueError(MP_ERROR_TEXT("non-hex digit found"));
}
if (i & 1) {
hex_byte <<= 4;
} else {
*out++ = hex_byte;
hex_byte = 0;
}
}
return mp_obj_new_str_from_vstr(MP_OBJ_TO_PTR(type_in), &vstr);
}
STATIC mp_obj_t bytes_hex_as_str(size_t n_args, const mp_obj_t *args) {
return mp_obj_bytes_hex(n_args, args, &mp_type_str);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(bytes_hex_as_str_obj, 1, 2, bytes_hex_as_str);
STATIC MP_DEFINE_CONST_FUN_OBJ_2(bytes_fromhex_obj, mp_obj_bytes_fromhex);
STATIC MP_DEFINE_CONST_CLASSMETHOD_OBJ(bytes_fromhex_classmethod_obj, MP_ROM_PTR(&bytes_fromhex_obj));
#endif // MICROPY_PY_BUILTINS_BYTES_HEX
mp_int_t mp_obj_str_get_buffer(mp_obj_t self_in, mp_buffer_info_t *bufinfo, mp_uint_t flags) {
if (flags == MP_BUFFER_READ) {
GET_STR_DATA_LEN(self_in, str_data, str_len);
@@ -1970,6 +2048,10 @@ STATIC const mp_rom_map_elem_t array_bytearray_str_bytes_locals_table[] = {
{ MP_ROM_QSTR(MP_QSTR_append), MP_ROM_PTR(&mp_obj_array_append_obj) },
{ MP_ROM_QSTR(MP_QSTR_extend), MP_ROM_PTR(&mp_obj_array_extend_obj) },
#endif
#if MICROPY_PY_BUILTINS_BYTES_HEX
{ MP_ROM_QSTR(MP_QSTR_hex), MP_ROM_PTR(&bytes_hex_as_str_obj) },
{ MP_ROM_QSTR(MP_QSTR_fromhex), MP_ROM_PTR(&bytes_fromhex_classmethod_obj) },
#endif
#if MICROPY_CPYTHON_COMPAT
{ MP_ROM_QSTR(MP_QSTR_decode), MP_ROM_PTR(&bytes_decode_obj) },
#endif
@@ -2018,6 +2100,12 @@ STATIC const mp_rom_map_elem_t array_bytearray_str_bytes_locals_table[] = {
#define TABLE_ENTRIES_COMPAT 0
#endif
#if MICROPY_PY_BUILTINS_BYTES_HEX
#define TABLE_ENTRIES_HEX 2
#else
#define TABLE_ENTRIES_HEX 0
#endif
#if MICROPY_PY_ARRAY || MICROPY_PY_BUILTINS_BYTEARRAY
#define TABLE_ENTRIES_ARRAY 2
#else
@@ -2025,8 +2113,8 @@ STATIC const mp_rom_map_elem_t array_bytearray_str_bytes_locals_table[] = {
#endif
MP_DEFINE_CONST_DICT_WITH_SIZE(mp_obj_str_locals_dict,
array_bytearray_str_bytes_locals_table + TABLE_ENTRIES_ARRAY + TABLE_ENTRIES_COMPAT,
MP_ARRAY_SIZE(array_bytearray_str_bytes_locals_table) - (TABLE_ENTRIES_ARRAY + TABLE_ENTRIES_COMPAT));
array_bytearray_str_bytes_locals_table + TABLE_ENTRIES_ARRAY + TABLE_ENTRIES_HEX + TABLE_ENTRIES_COMPAT,
MP_ARRAY_SIZE(array_bytearray_str_bytes_locals_table) - (TABLE_ENTRIES_ARRAY + TABLE_ENTRIES_HEX + TABLE_ENTRIES_COMPAT));
#if TABLE_ENTRIES_COMPAT == 0
#define mp_obj_bytes_locals_dict mp_obj_str_locals_dict
@@ -2048,6 +2136,12 @@ MP_DEFINE_CONST_DICT_WITH_SIZE(mp_obj_array_locals_dict,
TABLE_ENTRIES_ARRAY);
#endif
#if MICROPY_PY_BUILTINS_MEMORYVIEW && MICROPY_PY_BUILTINS_BYTES_HEX
MP_DEFINE_CONST_DICT_WITH_SIZE(mp_obj_memoryview_locals_dict,
array_bytearray_str_bytes_locals_table + TABLE_ENTRIES_ARRAY,
1); // Just the "hex" entry.
#endif
#if !MICROPY_PY_BUILTINS_STR_UNICODE
STATIC mp_obj_t mp_obj_new_str_iterator(mp_obj_t str, mp_obj_iter_buf_t *iter_buf);