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micropython/py/objstr.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
* Copyright (c) 2014 Paul Sokolovsky
*
* 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 <string.h>
#include <assert.h>
#include "py/unicode.h"
#include "py/objstr.h"
#include "py/objlist.h"
#include "py/runtime.h"
#include "py/stackctrl.h"
STATIC mp_obj_t str_modulo_format(mp_obj_t pattern, size_t n_args, const mp_obj_t *args, mp_obj_t dict);
STATIC mp_obj_t mp_obj_new_bytes_iterator(mp_obj_t str, mp_obj_iter_buf_t *iter_buf);
STATIC NORETURN void bad_implicit_conversion(mp_obj_t self_in);
/******************************************************************************/
/* str */
void mp_str_print_quoted(const mp_print_t *print, const byte *str_data, size_t str_len, bool is_bytes) {
// this escapes characters, but it will be very slow to print (calling print many times)
bool has_single_quote = false;
bool has_double_quote = false;
for (const byte *s = str_data, *top = str_data + str_len; !has_double_quote && s < top; s++) {
if (*s == '\'') {
has_single_quote = true;
} else if (*s == '"') {
has_double_quote = true;
}
}
int quote_char = '\'';
if (has_single_quote && !has_double_quote) {
quote_char = '"';
}
mp_printf(print, "%c", quote_char);
for (const byte *s = str_data, *top = str_data + str_len; s < top; s++) {
if (*s == quote_char) {
mp_printf(print, "\\%c", quote_char);
} else if (*s == '\\') {
mp_print_str(print, "\\\\");
} else if (*s >= 0x20 && *s != 0x7f && (!is_bytes || *s < 0x80)) {
// In strings, anything which is not ascii control character
// is printed as is, this includes characters in range 0x80-0xff
// (which can be non-Latin letters, etc.)
mp_printf(print, "%c", *s);
} else if (*s == '\n') {
mp_print_str(print, "\\n");
} else if (*s == '\r') {
mp_print_str(print, "\\r");
} else if (*s == '\t') {
mp_print_str(print, "\\t");
} else {
mp_printf(print, "\\x%02x", *s);
}
}
mp_printf(print, "%c", quote_char);
}
#if MICROPY_PY_UJSON
void mp_str_print_json(const mp_print_t *print, const byte *str_data, size_t str_len) {
// for JSON spec, see http://www.ietf.org/rfc/rfc4627.txt
// if we are given a valid utf8-encoded string, we will print it in a JSON-conforming way
mp_print_str(print, "\"");
for (const byte *s = str_data, *top = str_data + str_len; s < top; s++) {
if (*s == '"' || *s == '\\') {
mp_printf(print, "\\%c", *s);
} else if (*s >= 32) {
// this will handle normal and utf-8 encoded chars
mp_printf(print, "%c", *s);
} else if (*s == '\n') {
mp_print_str(print, "\\n");
} else if (*s == '\r') {
mp_print_str(print, "\\r");
} else if (*s == '\t') {
mp_print_str(print, "\\t");
} else {
// this will handle control chars
mp_printf(print, "\\u%04x", *s);
}
}
mp_print_str(print, "\"");
}
#endif
STATIC void str_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
GET_STR_DATA_LEN(self_in, str_data, str_len);
#if MICROPY_PY_UJSON
if (kind == PRINT_JSON) {
mp_str_print_json(print, str_data, str_len);
return;
}
#endif
#if !MICROPY_PY_BUILTINS_STR_UNICODE
bool is_bytes = MP_OBJ_IS_TYPE(self_in, &mp_type_bytes);
#else
bool is_bytes = true;
#endif
if (kind == PRINT_RAW || (!MICROPY_PY_BUILTINS_STR_UNICODE && kind == PRINT_STR && !is_bytes)) {
mp_printf(print, "%.*s", str_len, str_data);
} else {
if (is_bytes) {
mp_print_str(print, "b");
}
mp_str_print_quoted(print, str_data, str_len, is_bytes);
}
}
mp_obj_t mp_obj_str_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
#if MICROPY_CPYTHON_COMPAT
if (n_kw != 0) {
mp_arg_error_unimpl_kw();
}
#endif
mp_arg_check_num(n_args, n_kw, 0, 3, false);
switch (n_args) {
case 0:
return MP_OBJ_NEW_QSTR(MP_QSTR_);
case 1: {
vstr_t vstr;
mp_print_t print;
vstr_init_print(&vstr, 16, &print);
mp_obj_print_helper(&print, args[0], PRINT_STR);
return mp_obj_new_str_from_vstr(type, &vstr);
}
default: // 2 or 3 args
// TODO: validate 2nd/3rd args
if (MP_OBJ_IS_TYPE(args[0], &mp_type_bytes)) {
GET_STR_DATA_LEN(args[0], str_data, str_len);
GET_STR_HASH(args[0], str_hash);
if (str_hash == 0) {
str_hash = qstr_compute_hash(str_data, str_len);
}
#if MICROPY_PY_BUILTINS_STR_UNICODE_CHECK
if (!utf8_check(str_data, str_len)) {
mp_raise_msg(&mp_type_UnicodeError, NULL);
}
#endif
// Check if a qstr with this data already exists
qstr q = qstr_find_strn((const char*)str_data, str_len);
if (q != MP_QSTR_NULL) {
return MP_OBJ_NEW_QSTR(q);
}
mp_obj_str_t *o = MP_OBJ_TO_PTR(mp_obj_new_str_copy(type, NULL, str_len));
o->data = str_data;
o->hash = str_hash;
return MP_OBJ_FROM_PTR(o);
} else {
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(args[0], &bufinfo, MP_BUFFER_READ);
#if MICROPY_PY_BUILTINS_STR_UNICODE_CHECK
if (!utf8_check(bufinfo.buf, bufinfo.len)) {
mp_raise_msg(&mp_type_UnicodeError, NULL);
}
#endif
return mp_obj_new_str(bufinfo.buf, bufinfo.len);
}
}
}
STATIC mp_obj_t bytes_make_new(const mp_obj_type_t *type_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
(void)type_in;
#if MICROPY_CPYTHON_COMPAT
if (n_kw != 0) {
mp_arg_error_unimpl_kw();
}
#else
(void)n_kw;
#endif
if (n_args == 0) {
return mp_const_empty_bytes;
}
if (MP_OBJ_IS_STR(args[0])) {
if (n_args < 2 || n_args > 3) {
goto wrong_args;
}
GET_STR_DATA_LEN(args[0], str_data, str_len);
GET_STR_HASH(args[0], str_hash);
if (str_hash == 0) {
str_hash = qstr_compute_hash(str_data, str_len);
}
mp_obj_str_t *o = MP_OBJ_TO_PTR(mp_obj_new_str_copy(&mp_type_bytes, NULL, str_len));
o->data = str_data;
o->hash = str_hash;
return MP_OBJ_FROM_PTR(o);
}
if (n_args > 1) {
goto wrong_args;
}
if (MP_OBJ_IS_SMALL_INT(args[0])) {
mp_int_t len = MP_OBJ_SMALL_INT_VALUE(args[0]);
if (len < 0) {
mp_raise_ValueError(NULL);
}
vstr_t vstr;
vstr_init_len(&vstr, len);
memset(vstr.buf, 0, len);
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
}
// check if argument has the buffer protocol
mp_buffer_info_t bufinfo;
if (mp_get_buffer(args[0], &bufinfo, MP_BUFFER_READ)) {
return mp_obj_new_bytes(bufinfo.buf, bufinfo.len);
}
vstr_t vstr;
// Try to create array of exact len if initializer len is known
mp_obj_t len_in = mp_obj_len_maybe(args[0]);
if (len_in == MP_OBJ_NULL) {
vstr_init(&vstr, 16);
} else {
mp_int_t len = MP_OBJ_SMALL_INT_VALUE(len_in);
vstr_init(&vstr, len);
}
mp_obj_iter_buf_t iter_buf;
mp_obj_t iterable = mp_getiter(args[0], &iter_buf);
mp_obj_t item;
while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
mp_int_t val = mp_obj_get_int(item);
#if MICROPY_FULL_CHECKS
if (val < 0 || val > 255) {
mp_raise_ValueError("bytes value out of range");
}
#endif
vstr_add_byte(&vstr, val);
}
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
wrong_args:
mp_raise_TypeError("wrong number of arguments");
}
// like strstr but with specified length and allows \0 bytes
// TODO replace with something more efficient/standard
const byte *find_subbytes(const byte *haystack, size_t hlen, const byte *needle, size_t nlen, int direction) {
if (hlen >= nlen) {
size_t str_index, str_index_end;
if (direction > 0) {
str_index = 0;
str_index_end = hlen - nlen;
} else {
str_index = hlen - nlen;
str_index_end = 0;
}
for (;;) {
if (memcmp(&haystack[str_index], needle, nlen) == 0) {
//found
return haystack + str_index;
}
if (str_index == str_index_end) {
//not found
break;
}
str_index += direction;
}
}
return NULL;
}
// Note: this function is used to check if an object is a str or bytes, which
// works because both those types use it as their binary_op method. Revisit
// MP_OBJ_IS_STR_OR_BYTES if this fact changes.
mp_obj_t mp_obj_str_binary_op(mp_binary_op_t op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
// check for modulo
if (op == MP_BINARY_OP_MODULO) {
mp_obj_t *args = &rhs_in;
size_t n_args = 1;
mp_obj_t dict = MP_OBJ_NULL;
if (MP_OBJ_IS_TYPE(rhs_in, &mp_type_tuple)) {
// TODO: Support tuple subclasses?
mp_obj_tuple_get(rhs_in, &n_args, &args);
} else if (MP_OBJ_IS_TYPE(rhs_in, &mp_type_dict)) {
dict = rhs_in;
}
return str_modulo_format(lhs_in, n_args, args, dict);
}
// from now on we need lhs type and data, so extract them
mp_obj_type_t *lhs_type = mp_obj_get_type(lhs_in);
GET_STR_DATA_LEN(lhs_in, lhs_data, lhs_len);
// check for multiply
if (op == MP_BINARY_OP_MULTIPLY) {
mp_int_t n;
if (!mp_obj_get_int_maybe(rhs_in, &n)) {
return MP_OBJ_NULL; // op not supported
}
if (n <= 0) {
if (lhs_type == &mp_type_str) {
return MP_OBJ_NEW_QSTR(MP_QSTR_); // empty str
} else {
return mp_const_empty_bytes;
}
}
vstr_t vstr;
vstr_init_len(&vstr, lhs_len * n);
mp_seq_multiply(lhs_data, sizeof(*lhs_data), lhs_len, n, vstr.buf);
return mp_obj_new_str_from_vstr(lhs_type, &vstr);
}
// From now on all operations allow:
// - str with str
// - bytes with bytes
// - bytes with bytearray
// - bytes with array.array
// To do this efficiently we use the buffer protocol to extract the raw
// data for the rhs, but only if the lhs is a bytes object.
//
// NOTE: CPython does not allow comparison between bytes ard array.array
// (even if the array is of type 'b'), even though it allows addition of
// such types. We are not compatible with this (we do allow comparison
// of bytes with anything that has the buffer protocol). It would be
// easy to "fix" this with a bit of extra logic below, but it costs code
// size and execution time so we don't.
const byte *rhs_data;
size_t rhs_len;
if (lhs_type == mp_obj_get_type(rhs_in)) {
GET_STR_DATA_LEN(rhs_in, rhs_data_, rhs_len_);
rhs_data = rhs_data_;
rhs_len = rhs_len_;
} else if (lhs_type == &mp_type_bytes) {
mp_buffer_info_t bufinfo;
if (!mp_get_buffer(rhs_in, &bufinfo, MP_BUFFER_READ)) {
return MP_OBJ_NULL; // op not supported
}
rhs_data = bufinfo.buf;
rhs_len = bufinfo.len;
} else {
// LHS is str and RHS has an incompatible type
// (except if operation is EQUAL, but that's handled by mp_obj_equal)
bad_implicit_conversion(rhs_in);
}
switch (op) {
case MP_BINARY_OP_ADD:
case MP_BINARY_OP_INPLACE_ADD: {
if (lhs_len == 0 && mp_obj_get_type(rhs_in) == lhs_type) {
return rhs_in;
}
if (rhs_len == 0) {
return lhs_in;
}
vstr_t vstr;
vstr_init_len(&vstr, lhs_len + rhs_len);
memcpy(vstr.buf, lhs_data, lhs_len);
memcpy(vstr.buf + lhs_len, rhs_data, rhs_len);
return mp_obj_new_str_from_vstr(lhs_type, &vstr);
}
case MP_BINARY_OP_CONTAINS:
return mp_obj_new_bool(find_subbytes(lhs_data, lhs_len, rhs_data, rhs_len, 1) != NULL);
//case MP_BINARY_OP_NOT_EQUAL: // This is never passed here
case MP_BINARY_OP_EQUAL: // This will be passed only for bytes, str is dealt with in mp_obj_equal()
case MP_BINARY_OP_LESS:
case MP_BINARY_OP_LESS_EQUAL:
case MP_BINARY_OP_MORE:
case MP_BINARY_OP_MORE_EQUAL:
return mp_obj_new_bool(mp_seq_cmp_bytes(op, lhs_data, lhs_len, rhs_data, rhs_len));
default:
return MP_OBJ_NULL; // op not supported
}
}
#if !MICROPY_PY_BUILTINS_STR_UNICODE
// objstrunicode defines own version
const byte *str_index_to_ptr(const mp_obj_type_t *type, const byte *self_data, size_t self_len,
mp_obj_t index, bool is_slice) {
size_t index_val = mp_get_index(type, self_len, index, is_slice);
return self_data + index_val;
}
#endif
// This is used for both bytes and 8-bit strings. This is not used for unicode strings.
STATIC mp_obj_t bytes_subscr(mp_obj_t self_in, mp_obj_t index, mp_obj_t value) {
mp_obj_type_t *type = mp_obj_get_type(self_in);
GET_STR_DATA_LEN(self_in, self_data, self_len);
if (value == MP_OBJ_SENTINEL) {
// load
#if MICROPY_PY_BUILTINS_SLICE
if (MP_OBJ_IS_TYPE(index, &mp_type_slice)) {
mp_bound_slice_t slice;
if (!mp_seq_get_fast_slice_indexes(self_len, index, &slice)) {
mp_raise_NotImplementedError("only slices with step=1 (aka None) are supported");
}
return mp_obj_new_str_of_type(type, self_data + slice.start, slice.stop - slice.start);
}
#endif
size_t index_val = mp_get_index(type, self_len, index, false);
// If we have unicode enabled the type will always be bytes, so take the short cut.
if (MICROPY_PY_BUILTINS_STR_UNICODE || type == &mp_type_bytes) {
return MP_OBJ_NEW_SMALL_INT(self_data[index_val]);
} else {
return mp_obj_new_str_via_qstr((char*)&self_data[index_val], 1);
}
} else {
return MP_OBJ_NULL; // op not supported
}
}
STATIC mp_obj_t str_join(mp_obj_t self_in, mp_obj_t arg) {
mp_check_self(MP_OBJ_IS_STR_OR_BYTES(self_in));
const mp_obj_type_t *self_type = mp_obj_get_type(self_in);
// get separation string
GET_STR_DATA_LEN(self_in, sep_str, sep_len);
// process args
size_t seq_len;
mp_obj_t *seq_items;
if (!MP_OBJ_IS_TYPE(arg, &mp_type_list) && !MP_OBJ_IS_TYPE(arg, &mp_type_tuple)) {
// arg is not a list nor a tuple, try to convert it to a list
// TODO: Try to optimize?
arg = mp_type_list.make_new(&mp_type_list, 1, 0, &arg);
}
mp_obj_get_array(arg, &seq_len, &seq_items);
// count required length
size_t required_len = 0;
for (size_t i = 0; i < seq_len; i++) {
if (mp_obj_get_type(seq_items[i]) != self_type) {
mp_raise_TypeError(
"join expects a list of str/bytes objects consistent with self object");
}
if (i > 0) {
required_len += sep_len;
}
GET_STR_LEN(seq_items[i], l);
required_len += l;
}
// make joined string
vstr_t vstr;
vstr_init_len(&vstr, required_len);
byte *data = (byte*)vstr.buf;
for (size_t i = 0; i < seq_len; i++) {
if (i > 0) {
memcpy(data, sep_str, sep_len);
data += sep_len;
}
GET_STR_DATA_LEN(seq_items[i], s, l);
memcpy(data, s, l);
data += l;
}
// return joined string
return mp_obj_new_str_from_vstr(self_type, &vstr);
}
MP_DEFINE_CONST_FUN_OBJ_2(str_join_obj, str_join);
mp_obj_t mp_obj_str_split(size_t n_args, const mp_obj_t *args) {
const mp_obj_type_t *self_type = mp_obj_get_type(args[0]);
mp_int_t splits = -1;
mp_obj_t sep = mp_const_none;
if (n_args > 1) {
sep = args[1];
if (n_args > 2) {
splits = mp_obj_get_int(args[2]);
}
}
mp_obj_t res = mp_obj_new_list(0, NULL);
GET_STR_DATA_LEN(args[0], s, len);
const byte *top = s + len;
if (sep == mp_const_none) {
// sep not given, so separate on whitespace
// Initial whitespace is not counted as split, so we pre-do it
while (s < top && unichar_isspace(*s)) s++;
while (s < top && splits != 0) {
const byte *start = s;
while (s < top && !unichar_isspace(*s)) s++;
mp_obj_list_append(res, mp_obj_new_str_of_type(self_type, start, s - start));
if (s >= top) {
break;
}
while (s < top && unichar_isspace(*s)) s++;
if (splits > 0) {
splits--;
}
}
if (s < top) {
mp_obj_list_append(res, mp_obj_new_str_of_type(self_type, s, top - s));
}
} else {
// sep given
if (mp_obj_get_type(sep) != self_type) {
bad_implicit_conversion(sep);
}
size_t sep_len;
const char *sep_str = mp_obj_str_get_data(sep, &sep_len);
if (sep_len == 0) {
mp_raise_ValueError("empty separator");
}
for (;;) {
const byte *start = s;
for (;;) {
if (splits == 0 || s + sep_len > top) {
s = top;
break;
} else if (memcmp(s, sep_str, sep_len) == 0) {
break;
}
s++;
}
mp_obj_list_append(res, mp_obj_new_str_of_type(self_type, start, s - start));
if (s >= top) {
break;
}
s += sep_len;
if (splits > 0) {
splits--;
}
}
}
return res;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(str_split_obj, 1, 3, mp_obj_str_split);
#if MICROPY_PY_BUILTINS_STR_SPLITLINES
STATIC mp_obj_t str_splitlines(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_keepends };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_keepends, MP_ARG_BOOL, {.u_bool = false} },
};
// parse args
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
const mp_obj_type_t *self_type = mp_obj_get_type(pos_args[0]);
mp_obj_t res = mp_obj_new_list(0, NULL);
GET_STR_DATA_LEN(pos_args[0], s, len);
const byte *top = s + len;
while (s < top) {
const byte *start = s;
size_t match = 0;
while (s < top) {
if (*s == '\n') {
match = 1;
break;
} else if (*s == '\r') {
if (s[1] == '\n') {
match = 2;
} else {
match = 1;
}
break;
}
s++;
}
size_t sub_len = s - start;
if (args[ARG_keepends].u_bool) {
sub_len += match;
}
mp_obj_list_append(res, mp_obj_new_str_of_type(self_type, start, sub_len));
s += match;
}
return res;
}
MP_DEFINE_CONST_FUN_OBJ_KW(str_splitlines_obj, 1, str_splitlines);
#endif
STATIC mp_obj_t str_rsplit(size_t n_args, const mp_obj_t *args) {
if (n_args < 3) {
// If we don't have split limit, it doesn't matter from which side
// we split.
return mp_obj_str_split(n_args, args);
}
const mp_obj_type_t *self_type = mp_obj_get_type(args[0]);
mp_obj_t sep = args[1];
GET_STR_DATA_LEN(args[0], s, len);
mp_int_t splits = mp_obj_get_int(args[2]);
if (splits < 0) {
// Negative limit means no limit, so delegate to split().
return mp_obj_str_split(n_args, args);
}
mp_int_t org_splits = splits;
// Preallocate list to the max expected # of elements, as we
// will fill it from the end.
mp_obj_list_t *res = MP_OBJ_TO_PTR(mp_obj_new_list(splits + 1, NULL));
mp_int_t idx = splits;
if (sep == mp_const_none) {
mp_raise_NotImplementedError("rsplit(None,n)");
} else {
size_t sep_len;
const char *sep_str = mp_obj_str_get_data(sep, &sep_len);
if (sep_len == 0) {
mp_raise_ValueError("empty separator");
}
const byte *beg = s;
const byte *last = s + len;
for (;;) {
s = last - sep_len;
for (;;) {
if (splits == 0 || s < beg) {
break;
} else if (memcmp(s, sep_str, sep_len) == 0) {
break;
}
s--;
}
if (s < beg || splits == 0) {
res->items[idx] = mp_obj_new_str_of_type(self_type, beg, last - beg);
break;
}
res->items[idx--] = mp_obj_new_str_of_type(self_type, s + sep_len, last - s - sep_len);
last = s;
splits--;
}
if (idx != 0) {
// We split less parts than split limit, now go cleanup surplus
size_t used = org_splits + 1 - idx;
memmove(res->items, &res->items[idx], used * sizeof(mp_obj_t));
mp_seq_clear(res->items, used, res->alloc, sizeof(*res->items));
res->len = used;
}
}
return MP_OBJ_FROM_PTR(res);
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(str_rsplit_obj, 1, 3, str_rsplit);
STATIC mp_obj_t str_finder(size_t n_args, const mp_obj_t *args, int direction, bool is_index) {
const mp_obj_type_t *self_type = mp_obj_get_type(args[0]);
mp_check_self(MP_OBJ_IS_STR_OR_BYTES(args[0]));
// check argument type
if (mp_obj_get_type(args[1]) != self_type) {
bad_implicit_conversion(args[1]);
}
GET_STR_DATA_LEN(args[0], haystack, haystack_len);
GET_STR_DATA_LEN(args[1], needle, needle_len);
const byte *start = haystack;
const byte *end = haystack + haystack_len;
if (n_args >= 3 && args[2] != mp_const_none) {
start = str_index_to_ptr(self_type, haystack, haystack_len, args[2], true);
}
if (n_args >= 4 && args[3] != mp_const_none) {
end = str_index_to_ptr(self_type, haystack, haystack_len, args[3], true);
}
if (end < start) {
goto out_error;
}
const byte *p = find_subbytes(start, end - start, needle, needle_len, direction);
if (p == NULL) {
out_error:
// not found
if (is_index) {
mp_raise_ValueError("substring not found");
} else {
return MP_OBJ_NEW_SMALL_INT(-1);
}
} else {
// found
#if MICROPY_PY_BUILTINS_STR_UNICODE
if (self_type == &mp_type_str) {
return MP_OBJ_NEW_SMALL_INT(utf8_ptr_to_index(haystack, p));
}
#endif
return MP_OBJ_NEW_SMALL_INT(p - haystack);
}
}
STATIC mp_obj_t str_find(size_t n_args, const mp_obj_t *args) {
return str_finder(n_args, args, 1, false);
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(str_find_obj, 2, 4, str_find);
STATIC mp_obj_t str_rfind(size_t n_args, const mp_obj_t *args) {
return str_finder(n_args, args, -1, false);
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(str_rfind_obj, 2, 4, str_rfind);
STATIC mp_obj_t str_index(size_t n_args, const mp_obj_t *args) {
return str_finder(n_args, args, 1, true);
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(str_index_obj, 2, 4, str_index);
STATIC mp_obj_t str_rindex(size_t n_args, const mp_obj_t *args) {
return str_finder(n_args, args, -1, true);
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(str_rindex_obj, 2, 4, str_rindex);
// TODO: (Much) more variety in args
STATIC mp_obj_t str_startswith(size_t n_args, const mp_obj_t *args) {
const mp_obj_type_t *self_type = mp_obj_get_type(args[0]);
GET_STR_DATA_LEN(args[0], str, str_len);
size_t prefix_len;
const char *prefix = mp_obj_str_get_data(args[1], &prefix_len);
const byte *start = str;
if (n_args > 2) {
start = str_index_to_ptr(self_type, str, str_len, args[2], true);
}
if (prefix_len + (start - str) > str_len) {
return mp_const_false;
}
return mp_obj_new_bool(memcmp(start, prefix, prefix_len) == 0);
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(str_startswith_obj, 2, 3, str_startswith);
STATIC mp_obj_t str_endswith(size_t n_args, const mp_obj_t *args) {
GET_STR_DATA_LEN(args[0], str, str_len);
size_t suffix_len;
const char *suffix = mp_obj_str_get_data(args[1], &suffix_len);
if (n_args > 2) {
mp_raise_NotImplementedError("start/end indices");
}
if (suffix_len > str_len) {
return mp_const_false;
}
return mp_obj_new_bool(memcmp(str + (str_len - suffix_len), suffix, suffix_len) == 0);
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(str_endswith_obj, 2, 3, str_endswith);
enum { LSTRIP, RSTRIP, STRIP };
STATIC mp_obj_t str_uni_strip(int type, size_t n_args, const mp_obj_t *args) {
mp_check_self(MP_OBJ_IS_STR_OR_BYTES(args[0]));
const mp_obj_type_t *self_type = mp_obj_get_type(args[0]);
const byte *chars_to_del;
uint chars_to_del_len;
static const byte whitespace[] = " \t\n\r\v\f";
if (n_args == 1) {
chars_to_del = whitespace;
chars_to_del_len = sizeof(whitespace) - 1;
} else {
if (mp_obj_get_type(args[1]) != self_type) {
bad_implicit_conversion(args[1]);
}
GET_STR_DATA_LEN(args[1], s, l);
chars_to_del = s;
chars_to_del_len = l;
}
GET_STR_DATA_LEN(args[0], orig_str, orig_str_len);
size_t first_good_char_pos = 0;
bool first_good_char_pos_set = false;
size_t last_good_char_pos = 0;
size_t i = 0;
int delta = 1;
if (type == RSTRIP) {
i = orig_str_len - 1;
delta = -1;
}
for (size_t len = orig_str_len; len > 0; len--) {
if (find_subbytes(chars_to_del, chars_to_del_len, &orig_str[i], 1, 1) == NULL) {
if (!first_good_char_pos_set) {
first_good_char_pos_set = true;
first_good_char_pos = i;
if (type == LSTRIP) {
last_good_char_pos = orig_str_len - 1;
break;
} else if (type == RSTRIP) {
first_good_char_pos = 0;
last_good_char_pos = i;
break;
}
}
last_good_char_pos = i;
}
i += delta;
}
if (!first_good_char_pos_set) {
// string is all whitespace, return ''
if (self_type == &mp_type_str) {
return MP_OBJ_NEW_QSTR(MP_QSTR_);
} else {
return mp_const_empty_bytes;
}
}
assert(last_good_char_pos >= first_good_char_pos);
//+1 to accommodate the last character
size_t stripped_len = last_good_char_pos - first_good_char_pos + 1;
if (stripped_len == orig_str_len) {
// If nothing was stripped, don't bother to dup original string
// TODO: watch out for this case when we'll get to bytearray.strip()
assert(first_good_char_pos == 0);
return args[0];
}
return mp_obj_new_str_of_type(self_type, orig_str + first_good_char_pos, stripped_len);
}
STATIC mp_obj_t str_strip(size_t n_args, const mp_obj_t *args) {
return str_uni_strip(STRIP, n_args, args);
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(str_strip_obj, 1, 2, str_strip);
STATIC mp_obj_t str_lstrip(size_t n_args, const mp_obj_t *args) {
return str_uni_strip(LSTRIP, n_args, args);
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(str_lstrip_obj, 1, 2, str_lstrip);
STATIC mp_obj_t str_rstrip(size_t n_args, const mp_obj_t *args) {
return str_uni_strip(RSTRIP, n_args, args);
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(str_rstrip_obj, 1, 2, str_rstrip);
#if MICROPY_PY_BUILTINS_STR_CENTER
STATIC mp_obj_t str_center(mp_obj_t str_in, mp_obj_t width_in) {
GET_STR_DATA_LEN(str_in, str, str_len);
mp_uint_t width = mp_obj_get_int(width_in);
if (str_len >= width) {
return str_in;
}
vstr_t vstr;
vstr_init_len(&vstr, width);
memset(vstr.buf, ' ', width);
int left = (width - str_len) / 2;
memcpy(vstr.buf + left, str, str_len);
return mp_obj_new_str_from_vstr(mp_obj_get_type(str_in), &vstr);
}
MP_DEFINE_CONST_FUN_OBJ_2(str_center_obj, str_center);
#endif
// Takes an int arg, but only parses unsigned numbers, and only changes
// *num if at least one digit was parsed.
STATIC const char *str_to_int(const char *str, const char *top, int *num) {
if (str < top && '0' <= *str && *str <= '9') {
*num = 0;
do {
*num = *num * 10 + (*str - '0');
str++;
}
while (str < top && '0' <= *str && *str <= '9');
}
return str;
}
STATIC bool isalignment(char ch) {
return ch && strchr("<>=^", ch) != NULL;
}
STATIC bool istype(char ch) {
return ch && strchr("bcdeEfFgGnosxX%", ch) != NULL;
}
STATIC bool arg_looks_integer(mp_obj_t arg) {
return MP_OBJ_IS_TYPE(arg, &mp_type_bool) || MP_OBJ_IS_INT(arg);
}
STATIC bool arg_looks_numeric(mp_obj_t arg) {
return arg_looks_integer(arg)
#if MICROPY_PY_BUILTINS_FLOAT
|| mp_obj_is_float(arg)
#endif
;
}
STATIC mp_obj_t arg_as_int(mp_obj_t arg) {
#if MICROPY_PY_BUILTINS_FLOAT
if (mp_obj_is_float(arg)) {
return mp_obj_new_int_from_float(mp_obj_float_get(arg));
}
#endif
return arg;
}
#if MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE
STATIC NORETURN void terse_str_format_value_error(void) {
mp_raise_ValueError("bad format string");
}
#else
// define to nothing to improve coverage
#define terse_str_format_value_error()
#endif
STATIC vstr_t mp_obj_str_format_helper(const char *str, const char *top, int *arg_i, size_t n_args, const mp_obj_t *args, mp_map_t *kwargs) {
vstr_t vstr;
mp_print_t print;
vstr_init_print(&vstr, 16, &print);
for (; str < top; str++) {
if (*str == '}') {
str++;
if (str < top && *str == '}') {
vstr_add_byte(&vstr, '}');
continue;
}
if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
terse_str_format_value_error();
} else {
mp_raise_ValueError("single '}' encountered in format string");
}
}
if (*str != '{') {
vstr_add_byte(&vstr, *str);
continue;
}
str++;
if (str < top && *str == '{') {
vstr_add_byte(&vstr, '{');
continue;
}
// replacement_field ::= "{" [field_name] ["!" conversion] [":" format_spec] "}"
const char *field_name = NULL;
const char *field_name_top = NULL;
char conversion = '\0';
const char *format_spec = NULL;
if (str < top && *str != '}' && *str != '!' && *str != ':') {
field_name = (const char *)str;
while (str < top && *str != '}' && *str != '!' && *str != ':') {
++str;
}
field_name_top = (const char *)str;
}
// conversion ::= "r" | "s"
if (str < top && *str == '!') {
str++;
if (str < top && (*str == 'r' || *str == 's')) {
conversion = *str++;
} else {
if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
terse_str_format_value_error();
} else if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_NORMAL) {
mp_raise_ValueError("bad conversion specifier");
} else {
if (str >= top) {
mp_raise_ValueError(
"end of format while looking for conversion specifier");
} else {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError,
"unknown conversion specifier %c", *str));
}
}
}
}
if (str < top && *str == ':') {
str++;
// {:} is the same as {}, which is the same as {!s}
// This makes a difference when passing in a True or False
// '{}'.format(True) returns 'True'
// '{:d}'.format(True) returns '1'
// So we treat {:} as {} and this later gets treated to be {!s}
if (*str != '}') {
format_spec = str;
for (int nest = 1; str < top;) {
if (*str == '{') {
++nest;
} else if (*str == '}') {
if (--nest == 0) {
break;
}
}
++str;
}
}
}
if (str >= top) {
if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
terse_str_format_value_error();
} else {
mp_raise_ValueError("unmatched '{' in format");
}
}
if (*str != '}') {
if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
terse_str_format_value_error();
} else {
mp_raise_ValueError("expected ':' after format specifier");
}
}
mp_obj_t arg = mp_const_none;
if (field_name) {
int index = 0;
if (MP_LIKELY(unichar_isdigit(*field_name))) {
if (*arg_i > 0) {
if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
terse_str_format_value_error();
} else {
mp_raise_ValueError(
"can't switch from automatic field numbering to manual field specification");
}
}
field_name = str_to_int(field_name, field_name_top, &index);
if ((uint)index >= n_args - 1) {
mp_raise_msg(&mp_type_IndexError, "tuple index out of range");
}
arg = args[index + 1];
*arg_i = -1;
} else {
const char *lookup;
for (lookup = field_name; lookup < field_name_top && *lookup != '.' && *lookup != '['; lookup++);
mp_obj_t field_q = mp_obj_new_str_via_qstr(field_name, lookup - field_name); // should it be via qstr?
field_name = lookup;
mp_map_elem_t *key_elem = mp_map_lookup(kwargs, field_q, MP_MAP_LOOKUP);
if (key_elem == NULL) {
nlr_raise(mp_obj_new_exception_arg1(&mp_type_KeyError, field_q));
}
arg = key_elem->value;
}
if (field_name < field_name_top) {
mp_raise_NotImplementedError("attributes not supported yet");
}
} else {
if (*arg_i < 0) {
if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
terse_str_format_value_error();
} else {
mp_raise_ValueError(
"can't switch from manual field specification to automatic field numbering");
}
}
if ((uint)*arg_i >= n_args - 1) {
mp_raise_msg(&mp_type_IndexError, "tuple index out of range");
}
arg = args[(*arg_i) + 1];
(*arg_i)++;
}
if (!format_spec && !conversion) {
conversion = 's';
}
if (conversion) {
mp_print_kind_t print_kind;
if (conversion == 's') {
print_kind = PRINT_STR;
} else {
assert(conversion == 'r');
print_kind = PRINT_REPR;
}
vstr_t arg_vstr;
mp_print_t arg_print;
vstr_init_print(&arg_vstr, 16, &arg_print);
mp_obj_print_helper(&arg_print, arg, print_kind);
arg = mp_obj_new_str_from_vstr(&mp_type_str, &arg_vstr);
}
char fill = '\0';
char align = '\0';
int width = -1;
int precision = -1;
char type = '\0';
int flags = 0;
if (format_spec) {
// The format specifier (from http://docs.python.org/2/library/string.html#formatspec)
//
// [[fill]align][sign][#][0][width][,][.precision][type]
// fill ::= <any character>
// align ::= "<" | ">" | "=" | "^"
// sign ::= "+" | "-" | " "
// width ::= integer
// precision ::= integer
// type ::= "b" | "c" | "d" | "e" | "E" | "f" | "F" | "g" | "G" | "n" | "o" | "s" | "x" | "X" | "%"
// recursively call the formatter to format any nested specifiers
MP_STACK_CHECK();
vstr_t format_spec_vstr = mp_obj_str_format_helper(format_spec, str, arg_i, n_args, args, kwargs);
const char *s = vstr_null_terminated_str(&format_spec_vstr);
const char *stop = s + format_spec_vstr.len;
if (isalignment(*s)) {
align = *s++;
} else if (*s && isalignment(s[1])) {
fill = *s++;
align = *s++;
}
if (*s == '+' || *s == '-' || *s == ' ') {
if (*s == '+') {
flags |= PF_FLAG_SHOW_SIGN;
} else if (*s == ' ') {
flags |= PF_FLAG_SPACE_SIGN;
}
s++;
}
if (*s == '#') {
flags |= PF_FLAG_SHOW_PREFIX;
s++;
}
if (*s == '0') {
if (!align) {
align = '=';
}
if (!fill) {
fill = '0';
}
}
s = str_to_int(s, stop, &width);
if (*s == ',') {
flags |= PF_FLAG_SHOW_COMMA;
s++;
}
if (*s == '.') {
s++;
s = str_to_int(s, stop, &precision);
}
if (istype(*s)) {
type = *s++;
}
if (*s) {
if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
terse_str_format_value_error();
} else {
mp_raise_ValueError("invalid format specifier");
}
}
vstr_clear(&format_spec_vstr);
}
if (!align) {
if (arg_looks_numeric(arg)) {
align = '>';
} else {
align = '<';
}
}
if (!fill) {
fill = ' ';
}
if (flags & (PF_FLAG_SHOW_SIGN | PF_FLAG_SPACE_SIGN)) {
if (type == 's') {
if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
terse_str_format_value_error();
} else {
mp_raise_ValueError("sign not allowed in string format specifier");
}
}
if (type == 'c') {
if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
terse_str_format_value_error();
} else {
mp_raise_ValueError(
"sign not allowed with integer format specifier 'c'");
}
}
}
switch (align) {
case '<': flags |= PF_FLAG_LEFT_ADJUST; break;
case '=': flags |= PF_FLAG_PAD_AFTER_SIGN; break;
case '^': flags |= PF_FLAG_CENTER_ADJUST; break;
}
if (arg_looks_integer(arg)) {
switch (type) {
case 'b':
mp_print_mp_int(&print, arg, 2, 'a', flags, fill, width, 0);
continue;
case 'c':
{
char ch = mp_obj_get_int(arg);
mp_print_strn(&print, &ch, 1, flags, fill, width);
continue;
}
case '\0': // No explicit format type implies 'd'
case 'n': // I don't think we support locales in uPy so use 'd'
case 'd':
mp_print_mp_int(&print, arg, 10, 'a', flags, fill, width, 0);
continue;
case 'o':
if (flags & PF_FLAG_SHOW_PREFIX) {
flags |= PF_FLAG_SHOW_OCTAL_LETTER;
}
mp_print_mp_int(&print, arg, 8, 'a', flags, fill, width, 0);
continue;
case 'X':
case 'x':
mp_print_mp_int(&print, arg, 16, type - ('X' - 'A'), flags, fill, width, 0);
continue;
case 'e':
case 'E':
case 'f':
case 'F':
case 'g':
case 'G':
case '%':
// The floating point formatters all work with anything that
// looks like an integer
break;
default:
if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
terse_str_format_value_error();
} else {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError,
"unknown format code '%c' for object of type '%s'",
type, mp_obj_get_type_str(arg)));
}
}
}
// NOTE: no else here. We need the e, f, g etc formats for integer
// arguments (from above if) to take this if.
if (arg_looks_numeric(arg)) {
if (!type) {
// Even though the docs say that an unspecified type is the same
// as 'g', there is one subtle difference, when the exponent
// is one less than the precision.
//
// '{:10.1}'.format(0.0) ==> '0e+00'
// '{:10.1g}'.format(0.0) ==> '0'
//
// TODO: Figure out how to deal with this.
//
// A proper solution would involve adding a special flag
// or something to format_float, and create a format_double
// to deal with doubles. In order to fix this when using
// sprintf, we'd need to use the e format and tweak the
// returned result to strip trailing zeros like the g format
// does.
//
// {:10.3} and {:10.2e} with 1.23e2 both produce 1.23e+02
// but with 1.e2 you get 1e+02 and 1.00e+02
//
// Stripping the trailing 0's (like g) does would make the
// e format give us the right format.
//
// CPython sources say:
// Omitted type specifier. Behaves in the same way as repr(x)
// and str(x) if no precision is given, else like 'g', but with
// at least one digit after the decimal point. */
type = 'g';
}
if (type == 'n') {
type = 'g';
}
switch (type) {
#if MICROPY_PY_BUILTINS_FLOAT
case 'e':
case 'E':
case 'f':
case 'F':
case 'g':
case 'G':
mp_print_float(&print, mp_obj_get_float(arg), type, flags, fill, width, precision);
break;
case '%':
flags |= PF_FLAG_ADD_PERCENT;
#if MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_FLOAT
#define F100 100.0F
#else
#define F100 100.0
#endif
mp_print_float(&print, mp_obj_get_float(arg) * F100, 'f', flags, fill, width, precision);
#undef F100
break;
#endif
default:
if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
terse_str_format_value_error();
} else {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError,
"unknown format code '%c' for object of type 'float'",
type, mp_obj_get_type_str(arg)));
}
}
} else {
// arg doesn't look like a number
if (align == '=') {
if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
terse_str_format_value_error();
} else {
mp_raise_ValueError(
"'=' alignment not allowed in string format specifier");
}
}
switch (type) {
case '\0': // no explicit format type implies 's'
case 's': {
size_t slen;
const char *s = mp_obj_str_get_data(arg, &slen);
if (precision < 0) {
precision = slen;
}
if (slen > (size_t)precision) {
slen = precision;
}
mp_print_strn(&print, s, slen, flags, fill, width);
break;
}
default:
if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
terse_str_format_value_error();
} else {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError,
"unknown format code '%c' for object of type 'str'",
type, mp_obj_get_type_str(arg)));
}
}
}
}
return vstr;
}
mp_obj_t mp_obj_str_format(size_t n_args, const mp_obj_t *args, mp_map_t *kwargs) {
mp_check_self(MP_OBJ_IS_STR_OR_BYTES(args[0]));
GET_STR_DATA_LEN(args[0], str, len);
int arg_i = 0;
vstr_t vstr = mp_obj_str_format_helper((const char*)str, (const char*)str + len, &arg_i, n_args, args, kwargs);
return mp_obj_new_str_from_vstr(&mp_type_str, &vstr);
}
MP_DEFINE_CONST_FUN_OBJ_KW(str_format_obj, 1, mp_obj_str_format);
STATIC mp_obj_t str_modulo_format(mp_obj_t pattern, size_t n_args, const mp_obj_t *args, mp_obj_t dict) {
mp_check_self(MP_OBJ_IS_STR_OR_BYTES(pattern));
GET_STR_DATA_LEN(pattern, str, len);
const byte *start_str = str;
bool is_bytes = MP_OBJ_IS_TYPE(pattern, &mp_type_bytes);
size_t arg_i = 0;
vstr_t vstr;
mp_print_t print;
vstr_init_print(&vstr, 16, &print);
for (const byte *top = str + len; str < top; str++) {
mp_obj_t arg = MP_OBJ_NULL;
if (*str != '%') {
vstr_add_byte(&vstr, *str);
continue;
}
if (++str >= top) {
goto incomplete_format;
}
if (*str == '%') {
vstr_add_byte(&vstr, '%');
continue;
}
// Dictionary value lookup
if (*str == '(') {
if (dict == MP_OBJ_NULL) {
mp_raise_TypeError("format requires a dict");
}
arg_i = 1; // we used up the single dict argument
const byte *key = ++str;
while (*str != ')') {
if (str >= top) {
if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
terse_str_format_value_error();
} else {
mp_raise_ValueError("incomplete format key");
}
}
++str;
}
mp_obj_t k_obj = mp_obj_new_str_via_qstr((const char*)key, str - key);
arg = mp_obj_dict_get(dict, k_obj);
str++;
}
int flags = 0;
char fill = ' ';
int alt = 0;
while (str < top) {
if (*str == '-') flags |= PF_FLAG_LEFT_ADJUST;
else if (*str == '+') flags |= PF_FLAG_SHOW_SIGN;
else if (*str == ' ') flags |= PF_FLAG_SPACE_SIGN;
else if (*str == '#') alt = PF_FLAG_SHOW_PREFIX;
else if (*str == '0') {
flags |= PF_FLAG_PAD_AFTER_SIGN;
fill = '0';
} else break;
str++;
}
// parse width, if it exists
int width = 0;
if (str < top) {
if (*str == '*') {
if (arg_i >= n_args) {
goto not_enough_args;
}
width = mp_obj_get_int(args[arg_i++]);
str++;
} else {
str = (const byte*)str_to_int((const char*)str, (const char*)top, &width);
}
}
int prec = -1;
if (str < top && *str == '.') {
if (++str < top) {
if (*str == '*') {
if (arg_i >= n_args) {
goto not_enough_args;
}
prec = mp_obj_get_int(args[arg_i++]);
str++;
} else {
prec = 0;
str = (const byte*)str_to_int((const char*)str, (const char*)top, &prec);
}
}
}
if (str >= top) {
incomplete_format:
if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
terse_str_format_value_error();
} else {
mp_raise_ValueError("incomplete format");
}
}
// Tuple value lookup
if (arg == MP_OBJ_NULL) {
if (arg_i >= n_args) {
not_enough_args:
mp_raise_TypeError("not enough arguments for format string");
}
arg = args[arg_i++];
}
switch (*str) {
case 'c':
if (MP_OBJ_IS_STR(arg)) {
size_t slen;
const char *s = mp_obj_str_get_data(arg, &slen);
if (slen != 1) {
mp_raise_TypeError("%%c requires int or char");
}
mp_print_strn(&print, s, 1, flags, ' ', width);
} else if (arg_looks_integer(arg)) {
char ch = mp_obj_get_int(arg);
mp_print_strn(&print, &ch, 1, flags, ' ', width);
} else {
mp_raise_TypeError("integer required");
}
break;
case 'd':
case 'i':
case 'u':
mp_print_mp_int(&print, arg_as_int(arg), 10, 'a', flags, fill, width, prec);
break;
#if MICROPY_PY_BUILTINS_FLOAT
case 'e':
case 'E':
case 'f':
case 'F':
case 'g':
case 'G':
mp_print_float(&print, mp_obj_get_float(arg), *str, flags, fill, width, prec);
break;
#endif
case 'o':
if (alt) {
flags |= (PF_FLAG_SHOW_PREFIX | PF_FLAG_SHOW_OCTAL_LETTER);
}
mp_print_mp_int(&print, arg, 8, 'a', flags, fill, width, prec);
break;
case 'r':
case 's':
{
vstr_t arg_vstr;
mp_print_t arg_print;
vstr_init_print(&arg_vstr, 16, &arg_print);
mp_print_kind_t print_kind = (*str == 'r' ? PRINT_REPR : PRINT_STR);
if (print_kind == PRINT_STR && is_bytes && MP_OBJ_IS_TYPE(arg, &mp_type_bytes)) {
// If we have something like b"%s" % b"1", bytes arg should be
// printed undecorated.
print_kind = PRINT_RAW;
}
mp_obj_print_helper(&arg_print, arg, print_kind);
uint vlen = arg_vstr.len;
if (prec < 0) {
prec = vlen;
}
if (vlen > (uint)prec) {
vlen = prec;
}
mp_print_strn(&print, arg_vstr.buf, vlen, flags, ' ', width);
vstr_clear(&arg_vstr);
break;
}
case 'X':
case 'x':
mp_print_mp_int(&print, arg, 16, *str - ('X' - 'A'), flags | alt, fill, width, prec);
break;
default:
if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
terse_str_format_value_error();
} else {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError,
"unsupported format character '%c' (0x%x) at index %d",
*str, *str, str - start_str));
}
}
}
if (arg_i != n_args) {
mp_raise_TypeError("not all arguments converted during string formatting");
}
return mp_obj_new_str_from_vstr(is_bytes ? &mp_type_bytes : &mp_type_str, &vstr);
}
// The implementation is optimized, returning the original string if there's
// nothing to replace.
STATIC mp_obj_t str_replace(size_t n_args, const mp_obj_t *args) {
mp_check_self(MP_OBJ_IS_STR_OR_BYTES(args[0]));
mp_int_t max_rep = -1;
if (n_args == 4) {
max_rep = mp_obj_get_int(args[3]);
if (max_rep == 0) {
return args[0];
} else if (max_rep < 0) {
max_rep = -1;
}
}
// if max_rep is still -1 by this point we will need to do all possible replacements
// check argument types
const mp_obj_type_t *self_type = mp_obj_get_type(args[0]);
if (mp_obj_get_type(args[1]) != self_type) {
bad_implicit_conversion(args[1]);
}
if (mp_obj_get_type(args[2]) != self_type) {
bad_implicit_conversion(args[2]);
}
// extract string data
GET_STR_DATA_LEN(args[0], str, str_len);
GET_STR_DATA_LEN(args[1], old, old_len);
GET_STR_DATA_LEN(args[2], new, new_len);
// old won't exist in str if it's longer, so nothing to replace
if (old_len > str_len) {
return args[0];
}
// data for the replaced string
byte *data = NULL;
vstr_t vstr;
// do 2 passes over the string:
// first pass computes the required length of the replaced string
// second pass does the replacements
for (;;) {
size_t replaced_str_index = 0;
size_t num_replacements_done = 0;
const byte *old_occurrence;
const byte *offset_ptr = str;
size_t str_len_remain = str_len;
if (old_len == 0) {
// if old_str is empty, copy new_str to start of replaced string
// copy the replacement string
if (data != NULL) {
memcpy(data, new, new_len);
}
replaced_str_index += new_len;
num_replacements_done++;
}
while (num_replacements_done != (size_t)max_rep && str_len_remain > 0 && (old_occurrence = find_subbytes(offset_ptr, str_len_remain, old, old_len, 1)) != NULL) {
if (old_len == 0) {
old_occurrence += 1;
}
// copy from just after end of last occurrence of to-be-replaced string to right before start of next occurrence
if (data != NULL) {
memcpy(data + replaced_str_index, offset_ptr, old_occurrence - offset_ptr);
}
replaced_str_index += old_occurrence - offset_ptr;
// copy the replacement string
if (data != NULL) {
memcpy(data + replaced_str_index, new, new_len);
}
replaced_str_index += new_len;
offset_ptr = old_occurrence + old_len;
str_len_remain = str + str_len - offset_ptr;
num_replacements_done++;
}
// copy from just after end of last occurrence of to-be-replaced string to end of old string
if (data != NULL) {
memcpy(data + replaced_str_index, offset_ptr, str_len_remain);
}
replaced_str_index += str_len_remain;
if (data == NULL) {
// first pass
if (num_replacements_done == 0) {
// no substr found, return original string
return args[0];
} else {
// substr found, allocate new string
vstr_init_len(&vstr, replaced_str_index);
data = (byte*)vstr.buf;
assert(data != NULL);
}
} else {
// second pass, we are done
break;
}
}
return mp_obj_new_str_from_vstr(self_type, &vstr);
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(str_replace_obj, 3, 4, str_replace);
STATIC mp_obj_t str_count(size_t n_args, const mp_obj_t *args) {
const mp_obj_type_t *self_type = mp_obj_get_type(args[0]);
mp_check_self(MP_OBJ_IS_STR_OR_BYTES(args[0]));
// check argument type
if (mp_obj_get_type(args[1]) != self_type) {
bad_implicit_conversion(args[1]);
}
GET_STR_DATA_LEN(args[0], haystack, haystack_len);
GET_STR_DATA_LEN(args[1], needle, needle_len);
const byte *start = haystack;
const byte *end = haystack + haystack_len;
if (n_args >= 3 && args[2] != mp_const_none) {
start = str_index_to_ptr(self_type, haystack, haystack_len, args[2], true);
}
if (n_args >= 4 && args[3] != mp_const_none) {
end = str_index_to_ptr(self_type, haystack, haystack_len, args[3], true);
}
// if needle_len is zero then we count each gap between characters as an occurrence
if (needle_len == 0) {
return MP_OBJ_NEW_SMALL_INT(utf8_charlen(start, end - start) + 1);
}
// count the occurrences
mp_int_t num_occurrences = 0;
for (const byte *haystack_ptr = start; haystack_ptr + needle_len <= end;) {
if (memcmp(haystack_ptr, needle, needle_len) == 0) {
num_occurrences++;
haystack_ptr += needle_len;
} else {
haystack_ptr = utf8_next_char(haystack_ptr);
}
}
return MP_OBJ_NEW_SMALL_INT(num_occurrences);
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(str_count_obj, 2, 4, str_count);
#if MICROPY_PY_BUILTINS_STR_PARTITION
STATIC mp_obj_t str_partitioner(mp_obj_t self_in, mp_obj_t arg, int direction) {
mp_check_self(MP_OBJ_IS_STR_OR_BYTES(self_in));
mp_obj_type_t *self_type = mp_obj_get_type(self_in);
if (self_type != mp_obj_get_type(arg)) {
bad_implicit_conversion(arg);
}
GET_STR_DATA_LEN(self_in, str, str_len);
GET_STR_DATA_LEN(arg, sep, sep_len);
if (sep_len == 0) {
mp_raise_ValueError("empty separator");
}
mp_obj_t result[3];
if (self_type == &mp_type_str) {
result[0] = MP_OBJ_NEW_QSTR(MP_QSTR_);
result[1] = MP_OBJ_NEW_QSTR(MP_QSTR_);
result[2] = MP_OBJ_NEW_QSTR(MP_QSTR_);
} else {
result[0] = mp_const_empty_bytes;
result[1] = mp_const_empty_bytes;
result[2] = mp_const_empty_bytes;
}
if (direction > 0) {
result[0] = self_in;
} else {
result[2] = self_in;
}
const byte *position_ptr = find_subbytes(str, str_len, sep, sep_len, direction);
if (position_ptr != NULL) {
size_t position = position_ptr - str;
result[0] = mp_obj_new_str_of_type(self_type, str, position);
result[1] = arg;
result[2] = mp_obj_new_str_of_type(self_type, str + position + sep_len, str_len - position - sep_len);
}
return mp_obj_new_tuple(3, result);
}
STATIC mp_obj_t str_partition(mp_obj_t self_in, mp_obj_t arg) {
return str_partitioner(self_in, arg, 1);
}
MP_DEFINE_CONST_FUN_OBJ_2(str_partition_obj, str_partition);
STATIC mp_obj_t str_rpartition(mp_obj_t self_in, mp_obj_t arg) {
return str_partitioner(self_in, arg, -1);
}
MP_DEFINE_CONST_FUN_OBJ_2(str_rpartition_obj, str_rpartition);
#endif
// Supposedly not too critical operations, so optimize for code size
STATIC mp_obj_t str_caseconv(unichar (*op)(unichar), mp_obj_t self_in) {
GET_STR_DATA_LEN(self_in, self_data, self_len);
vstr_t vstr;
vstr_init_len(&vstr, self_len);
byte *data = (byte*)vstr.buf;
for (size_t i = 0; i < self_len; i++) {
*data++ = op(*self_data++);
}
return mp_obj_new_str_from_vstr(mp_obj_get_type(self_in), &vstr);
}
STATIC mp_obj_t str_lower(mp_obj_t self_in) {
return str_caseconv(unichar_tolower, self_in);
}
MP_DEFINE_CONST_FUN_OBJ_1(str_lower_obj, str_lower);
STATIC mp_obj_t str_upper(mp_obj_t self_in) {
return str_caseconv(unichar_toupper, self_in);
}
MP_DEFINE_CONST_FUN_OBJ_1(str_upper_obj, str_upper);
STATIC mp_obj_t str_uni_istype(bool (*f)(unichar), mp_obj_t self_in) {
GET_STR_DATA_LEN(self_in, self_data, self_len);
if (self_len == 0) {
return mp_const_false; // default to False for empty str
}
if (f != unichar_isupper && f != unichar_islower) {
for (size_t i = 0; i < self_len; i++) {
if (!f(*self_data++)) {
return mp_const_false;
}
}
} else {
bool contains_alpha = false;
for (size_t i = 0; i < self_len; i++) { // only check alphanumeric characters
if (unichar_isalpha(*self_data++)) {
contains_alpha = true;
if (!f(*(self_data - 1))) { // -1 because we already incremented above
return mp_const_false;
}
}
}
if (!contains_alpha) {
return mp_const_false;
}
}
return mp_const_true;
}
STATIC mp_obj_t str_isspace(mp_obj_t self_in) {
return str_uni_istype(unichar_isspace, self_in);
}
MP_DEFINE_CONST_FUN_OBJ_1(str_isspace_obj, str_isspace);
STATIC mp_obj_t str_isalpha(mp_obj_t self_in) {
return str_uni_istype(unichar_isalpha, self_in);
}
MP_DEFINE_CONST_FUN_OBJ_1(str_isalpha_obj, str_isalpha);
STATIC mp_obj_t str_isdigit(mp_obj_t self_in) {
return str_uni_istype(unichar_isdigit, self_in);
}
MP_DEFINE_CONST_FUN_OBJ_1(str_isdigit_obj, str_isdigit);
STATIC mp_obj_t str_isupper(mp_obj_t self_in) {
return str_uni_istype(unichar_isupper, self_in);
}
MP_DEFINE_CONST_FUN_OBJ_1(str_isupper_obj, str_isupper);
STATIC mp_obj_t str_islower(mp_obj_t self_in) {
return str_uni_istype(unichar_islower, self_in);
}
MP_DEFINE_CONST_FUN_OBJ_1(str_islower_obj, str_islower);
#if MICROPY_CPYTHON_COMPAT
// These methods are superfluous in the presence of str() and bytes()
// constructors.
// TODO: should accept kwargs too
STATIC mp_obj_t bytes_decode(size_t n_args, const mp_obj_t *args) {
mp_obj_t new_args[2];
if (n_args == 1) {
new_args[0] = args[0];
new_args[1] = MP_OBJ_NEW_QSTR(MP_QSTR_utf_hyphen_8);
args = new_args;
n_args++;
}
return mp_obj_str_make_new(&mp_type_str, n_args, 0, args);
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(bytes_decode_obj, 1, 3, bytes_decode);
// TODO: should accept kwargs too
STATIC mp_obj_t str_encode(size_t n_args, const mp_obj_t *args) {
mp_obj_t new_args[2];
if (n_args == 1) {
new_args[0] = args[0];
new_args[1] = MP_OBJ_NEW_QSTR(MP_QSTR_utf_hyphen_8);
args = new_args;
n_args++;
}
return bytes_make_new(NULL, n_args, 0, args);
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(str_encode_obj, 1, 3, str_encode);
#endif
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);
bufinfo->buf = (void*)str_data;
bufinfo->len = str_len;
bufinfo->typecode = 'B'; // bytes should be unsigned, so should unicode byte-access
return 0;
} else {
// can't write to a string
bufinfo->buf = NULL;
bufinfo->len = 0;
bufinfo->typecode = -1;
return 1;
}
}
STATIC const mp_rom_map_elem_t str8_locals_dict_table[] = {
#if MICROPY_CPYTHON_COMPAT
{ MP_ROM_QSTR(MP_QSTR_decode), MP_ROM_PTR(&bytes_decode_obj) },
#if !MICROPY_PY_BUILTINS_STR_UNICODE
// If we have separate unicode type, then here we have methods only
// for bytes type, and it should not have encode() methods. Otherwise,
// we have non-compliant-but-practical bytestring type, which shares
// method table with bytes, so they both have encode() and decode()
// methods (which should do type checking at runtime).
{ MP_ROM_QSTR(MP_QSTR_encode), MP_ROM_PTR(&str_encode_obj) },
#endif
#endif
{ MP_ROM_QSTR(MP_QSTR_find), MP_ROM_PTR(&str_find_obj) },
{ MP_ROM_QSTR(MP_QSTR_rfind), MP_ROM_PTR(&str_rfind_obj) },
{ MP_ROM_QSTR(MP_QSTR_index), MP_ROM_PTR(&str_index_obj) },
{ MP_ROM_QSTR(MP_QSTR_rindex), MP_ROM_PTR(&str_rindex_obj) },
{ MP_ROM_QSTR(MP_QSTR_join), MP_ROM_PTR(&str_join_obj) },
{ MP_ROM_QSTR(MP_QSTR_split), MP_ROM_PTR(&str_split_obj) },
#if MICROPY_PY_BUILTINS_STR_SPLITLINES
{ MP_ROM_QSTR(MP_QSTR_splitlines), MP_ROM_PTR(&str_splitlines_obj) },
#endif
{ MP_ROM_QSTR(MP_QSTR_rsplit), MP_ROM_PTR(&str_rsplit_obj) },
{ MP_ROM_QSTR(MP_QSTR_startswith), MP_ROM_PTR(&str_startswith_obj) },
{ MP_ROM_QSTR(MP_QSTR_endswith), MP_ROM_PTR(&str_endswith_obj) },
{ MP_ROM_QSTR(MP_QSTR_strip), MP_ROM_PTR(&str_strip_obj) },
{ MP_ROM_QSTR(MP_QSTR_lstrip), MP_ROM_PTR(&str_lstrip_obj) },
{ MP_ROM_QSTR(MP_QSTR_rstrip), MP_ROM_PTR(&str_rstrip_obj) },
{ MP_ROM_QSTR(MP_QSTR_format), MP_ROM_PTR(&str_format_obj) },
{ MP_ROM_QSTR(MP_QSTR_replace), MP_ROM_PTR(&str_replace_obj) },
{ MP_ROM_QSTR(MP_QSTR_count), MP_ROM_PTR(&str_count_obj) },
#if MICROPY_PY_BUILTINS_STR_PARTITION
{ MP_ROM_QSTR(MP_QSTR_partition), MP_ROM_PTR(&str_partition_obj) },
{ MP_ROM_QSTR(MP_QSTR_rpartition), MP_ROM_PTR(&str_rpartition_obj) },
#endif
#if MICROPY_PY_BUILTINS_STR_CENTER
{ MP_ROM_QSTR(MP_QSTR_center), MP_ROM_PTR(&str_center_obj) },
#endif
{ MP_ROM_QSTR(MP_QSTR_lower), MP_ROM_PTR(&str_lower_obj) },
{ MP_ROM_QSTR(MP_QSTR_upper), MP_ROM_PTR(&str_upper_obj) },
{ MP_ROM_QSTR(MP_QSTR_isspace), MP_ROM_PTR(&str_isspace_obj) },
{ MP_ROM_QSTR(MP_QSTR_isalpha), MP_ROM_PTR(&str_isalpha_obj) },
{ MP_ROM_QSTR(MP_QSTR_isdigit), MP_ROM_PTR(&str_isdigit_obj) },
{ MP_ROM_QSTR(MP_QSTR_isupper), MP_ROM_PTR(&str_isupper_obj) },
{ MP_ROM_QSTR(MP_QSTR_islower), MP_ROM_PTR(&str_islower_obj) },
};
STATIC MP_DEFINE_CONST_DICT(str8_locals_dict, str8_locals_dict_table);
#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);
const mp_obj_type_t mp_type_str = {
{ &mp_type_type },
.name = MP_QSTR_str,
.print = str_print,
.make_new = mp_obj_str_make_new,
.binary_op = mp_obj_str_binary_op,
.subscr = bytes_subscr,
.getiter = mp_obj_new_str_iterator,
.buffer_p = { .get_buffer = mp_obj_str_get_buffer },
.locals_dict = (mp_obj_dict_t*)&str8_locals_dict,
};
#endif
// Reuses most of methods from str
const mp_obj_type_t mp_type_bytes = {
{ &mp_type_type },
.name = MP_QSTR_bytes,
.print = str_print,
.make_new = bytes_make_new,
.binary_op = mp_obj_str_binary_op,
.subscr = bytes_subscr,
.getiter = mp_obj_new_bytes_iterator,
.buffer_p = { .get_buffer = mp_obj_str_get_buffer },
.locals_dict = (mp_obj_dict_t*)&str8_locals_dict,
};
// The zero-length bytes object, with data that includes a null-terminating byte
const mp_obj_str_t mp_const_empty_bytes_obj = {{&mp_type_bytes}, 0, 0, (const byte*)""};
// Create a str/bytes object using the given data. New memory is allocated and
// the data is copied across. This function should only be used if the type is bytes,
// or if the type is str and the string data is known to be not interned.
mp_obj_t mp_obj_new_str_copy(const mp_obj_type_t *type, const byte* data, size_t len) {
mp_obj_str_t *o = m_new_obj(mp_obj_str_t);
o->base.type = type;
o->len = len;
if (data) {
o->hash = qstr_compute_hash(data, len);
byte *p = m_new(byte, len + 1);
o->data = p;
memcpy(p, data, len * sizeof(byte));
p[len] = '\0'; // for now we add null for compatibility with C ASCIIZ strings
}
return MP_OBJ_FROM_PTR(o);
}
// Create a str/bytes object using the given data. If the type is str and the string
// data is already interned, then a qstr object is returned. Otherwise new memory is
// allocated for the object and the data is copied across.
mp_obj_t mp_obj_new_str_of_type(const mp_obj_type_t *type, const byte* data, size_t len) {
if (type == &mp_type_str) {
return mp_obj_new_str((const char*)data, len);
} else {
return mp_obj_new_bytes(data, len);
}
}
// Create a str using a qstr to store the data; may use existing or new qstr.
mp_obj_t mp_obj_new_str_via_qstr(const char* data, size_t len) {
return MP_OBJ_NEW_QSTR(qstr_from_strn(data, len));
}
// Create a str/bytes object from the given vstr. The vstr buffer is resized to
// the exact length required and then reused for the str/bytes object. The vstr
// is cleared and can safely be passed to vstr_free if it was heap allocated.
mp_obj_t mp_obj_new_str_from_vstr(const mp_obj_type_t *type, vstr_t *vstr) {
// if not a bytes object, look if a qstr with this data already exists
if (type == &mp_type_str) {
qstr q = qstr_find_strn(vstr->buf, vstr->len);
if (q != MP_QSTR_NULL) {
vstr_clear(vstr);
vstr->alloc = 0;
return MP_OBJ_NEW_QSTR(q);
}
}
// make a new str/bytes object
mp_obj_str_t *o = m_new_obj(mp_obj_str_t);
o->base.type = type;
o->len = vstr->len;
o->hash = qstr_compute_hash((byte*)vstr->buf, vstr->len);
if (vstr->len + 1 == vstr->alloc) {
o->data = (byte*)vstr->buf;
} else {
o->data = (byte*)m_renew(char, vstr->buf, vstr->alloc, vstr->len + 1);
}
((byte*)o->data)[o->len] = '\0'; // add null byte
vstr->buf = NULL;
vstr->alloc = 0;
return MP_OBJ_FROM_PTR(o);
}
mp_obj_t mp_obj_new_str(const char* data, size_t len) {
qstr q = qstr_find_strn(data, len);
if (q != MP_QSTR_NULL) {
// qstr with this data already exists
return MP_OBJ_NEW_QSTR(q);
} else {
// no existing qstr, don't make one
return mp_obj_new_str_copy(&mp_type_str, (const byte*)data, len);
}
}
mp_obj_t mp_obj_str_intern(mp_obj_t str) {
GET_STR_DATA_LEN(str, data, len);
return mp_obj_new_str_via_qstr((const char*)data, len);
}
mp_obj_t mp_obj_str_intern_checked(mp_obj_t obj) {
size_t len;
const char *data = mp_obj_str_get_data(obj, &len);
return mp_obj_new_str_via_qstr((const char*)data, len);
}
mp_obj_t mp_obj_new_bytes(const byte* data, size_t len) {
return mp_obj_new_str_copy(&mp_type_bytes, data, len);
}
bool mp_obj_str_equal(mp_obj_t s1, mp_obj_t s2) {
if (MP_OBJ_IS_QSTR(s1) && MP_OBJ_IS_QSTR(s2)) {
return s1 == s2;
} else {
GET_STR_HASH(s1, h1);
GET_STR_HASH(s2, h2);
// If any of hashes is 0, it means it's not valid
if (h1 != 0 && h2 != 0 && h1 != h2) {
return false;
}
GET_STR_DATA_LEN(s1, d1, l1);
GET_STR_DATA_LEN(s2, d2, l2);
if (l1 != l2) {
return false;
}
return memcmp(d1, d2, l1) == 0;
}
}
STATIC NORETURN void bad_implicit_conversion(mp_obj_t self_in) {
if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
mp_raise_TypeError("can't convert to str implicitly");
} else {
const qstr src_name = mp_obj_get_type(self_in)->name;
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
"can't convert '%q' object to %q implicitly",
src_name, src_name == MP_QSTR_str ? MP_QSTR_bytes : MP_QSTR_str));
}
}
// use this if you will anyway convert the string to a qstr
// will be more efficient for the case where it's already a qstr
qstr mp_obj_str_get_qstr(mp_obj_t self_in) {
if (MP_OBJ_IS_QSTR(self_in)) {
return MP_OBJ_QSTR_VALUE(self_in);
} else if (MP_OBJ_IS_TYPE(self_in, &mp_type_str)) {
mp_obj_str_t *self = MP_OBJ_TO_PTR(self_in);
return qstr_from_strn((char*)self->data, self->len);
} else {
bad_implicit_conversion(self_in);
}
}
// only use this function if you need the str data to be zero terminated
// at the moment all strings are zero terminated to help with C ASCIIZ compatibility
const char *mp_obj_str_get_str(mp_obj_t self_in) {
if (MP_OBJ_IS_STR_OR_BYTES(self_in)) {
GET_STR_DATA_LEN(self_in, s, l);
(void)l; // len unused
return (const char*)s;
} else {
bad_implicit_conversion(self_in);
}
}
const char *mp_obj_str_get_data(mp_obj_t self_in, size_t *len) {
if (MP_OBJ_IS_STR_OR_BYTES(self_in)) {
GET_STR_DATA_LEN(self_in, s, l);
*len = l;
return (const char*)s;
} else {
bad_implicit_conversion(self_in);
}
}
#if MICROPY_OBJ_REPR == MICROPY_OBJ_REPR_C
const byte *mp_obj_str_get_data_no_check(mp_obj_t self_in, size_t *len) {
if (MP_OBJ_IS_QSTR(self_in)) {
return qstr_data(MP_OBJ_QSTR_VALUE(self_in), len);
} else {
*len = ((mp_obj_str_t*)self_in)->len;
return ((mp_obj_str_t*)self_in)->data;
}
}
#endif
/******************************************************************************/
/* str iterator */
typedef struct _mp_obj_str8_it_t {
mp_obj_base_t base;
mp_fun_1_t iternext;
mp_obj_t str;
size_t cur;
} mp_obj_str8_it_t;
#if !MICROPY_PY_BUILTINS_STR_UNICODE
STATIC mp_obj_t str_it_iternext(mp_obj_t self_in) {
mp_obj_str8_it_t *self = MP_OBJ_TO_PTR(self_in);
GET_STR_DATA_LEN(self->str, str, len);
if (self->cur < len) {
mp_obj_t o_out = mp_obj_new_str_via_qstr((const char*)str + self->cur, 1);
self->cur += 1;
return o_out;
} else {
return MP_OBJ_STOP_ITERATION;
}
}
STATIC mp_obj_t mp_obj_new_str_iterator(mp_obj_t str, mp_obj_iter_buf_t *iter_buf) {
assert(sizeof(mp_obj_str8_it_t) <= sizeof(mp_obj_iter_buf_t));
mp_obj_str8_it_t *o = (mp_obj_str8_it_t*)iter_buf;
o->base.type = &mp_type_polymorph_iter;
o->iternext = str_it_iternext;
o->str = str;
o->cur = 0;
return MP_OBJ_FROM_PTR(o);
}
#endif
STATIC mp_obj_t bytes_it_iternext(mp_obj_t self_in) {
mp_obj_str8_it_t *self = MP_OBJ_TO_PTR(self_in);
GET_STR_DATA_LEN(self->str, str, len);
if (self->cur < len) {
mp_obj_t o_out = MP_OBJ_NEW_SMALL_INT(str[self->cur]);
self->cur += 1;
return o_out;
} else {
return MP_OBJ_STOP_ITERATION;
}
}
mp_obj_t mp_obj_new_bytes_iterator(mp_obj_t str, mp_obj_iter_buf_t *iter_buf) {
assert(sizeof(mp_obj_str8_it_t) <= sizeof(mp_obj_iter_buf_t));
mp_obj_str8_it_t *o = (mp_obj_str8_it_t*)iter_buf;
o->base.type = &mp_type_polymorph_iter;
o->iternext = bytes_it_iternext;
o->str = str;
o->cur = 0;
return MP_OBJ_FROM_PTR(o);
}
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