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objstrunicode: Basic implementation of unicode handling.

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Squashed commit of the following:

commit 99dc21b67a895dc10d3c846bc158d27c839cee48
Author: Chris Angelico <rosuav@gmail.com>
Date:   Thu Jun 12 02:18:54 2014 +1000

    Optimize as per TODO (thanks Damien!)

commit 5bf0153ecad8348443058d449d74504fc458fe51
Author: Chris Angelico <rosuav@gmail.com>
Date:   Tue Jun 10 08:42:06 2014 +1000

    Test a default (= UTF-8) encode and decode

commit c962057ac340832c4fde60896f656a3fe3ad78a9
Merge: e2c9782 195de32
Author: Chris Angelico <rosuav@gmail.com>
Date:   Tue Jun 10 05:23:03 2014 +1000

    Merge branch 'master' into unicode, resolving conflict on py/obj.h

commit e2c9782a65eb57f481d441d40161de427e1940ba
Author: Chris Angelico <rosuav@gmail.com>
Date:   Tue Jun 10 05:05:57 2014 +1000

    More whitespace fixups

commit 086a2a0f57afbc1f731697fd5d3a0cbbb80e5418
Author: Chris Angelico <rosuav@gmail.com>
Date:   Tue Jun 10 05:04:20 2014 +1000

    Properly implement string slicing

commit 0d339a143e2b6442366145e7f3d64aada293eaa0
Author: Chris Angelico <rosuav@gmail.com>
Date:   Tue Jun 10 02:24:11 2014 +1000

    Support slicing in str_index_to_ptr, and fix a bounds error

commit 24371c7267d360e77cf5eabc2e8ce9a73d2ee0da
Author: Chris Angelico <rosuav@gmail.com>
Date:   Tue Jun 10 02:10:22 2014 +1000

    Break out index-to-pointer calculation into a function

commit 616c24ac014c3ca56008428c506034dd1bfff7a8
Author: Chris Angelico <rosuav@gmail.com>
Date:   Tue Jun 10 02:03:11 2014 +1000

    Add tests of string slicing, which currently fail

commit a24d19f676fe8cc21dad512d91b826892e162a5b
Author: Chris Angelico <rosuav@gmail.com>
Date:   Tue Jun 10 01:56:53 2014 +1000

    Change string indexing to not precalculate the charlen, and add test for neg indexing

commit 0bcc7ab89eafb2ae53195e94c9bea42a4e886b64
Author: Chris Angelico <rosuav@gmail.com>
Date:   Sun Jun 8 22:09:17 2014 +1000

    Clean up constant qstr declarations now that charlen isn't needed

commit 5473e1a1dba2124b7b0c207f2964293cfbe80167
Author: Chris Angelico <rosuav@gmail.com>
Date:   Sun Jun 8 07:18:42 2014 +1000

    Remove the charlen field from strings, calculating it when required

commit 5c1658ec71aefbdc88c261ce2e57dc7670cdc6ef
Author: Chris Angelico <rosuav@gmail.com>
Date:   Sun Jun 8 07:11:27 2014 +1000

    Get rid of mp_obj_str_get_data_len() which was used in only one place

commit a019ba968b4e8daf7f3674f63c5cc400e304c509
Author: Chris Angelico <rosuav@gmail.com>
Date:   Sun Jun 8 06:58:26 2014 +1000

    Add a unichar_charlen() function to calculate length-in-characters from length-in-bytes

commit 44b0d5cff846ba487c526ed95be1b3d1cd3d762a
Author: Chris Angelico <rosuav@gmail.com>
Date:   Sun Jun 8 06:32:44 2014 +1000

    Use utf8_get/next_char in building up a string's repr

commit 30d1bad33f7af90f1971987c39864c8fcf3f5c21
Author: Chris Angelico <rosuav@gmail.com>
Date:   Sun Jun 8 06:10:45 2014 +1000

    Make utf8_get_char() and utf8_next_char() actually do what their names say

commit bc990dad9afb8ec112f5e7f7f79d5ab415da0e72
Author: Chris Angelico <rosuav@gmail.com>
Date:   Sun Jun 8 02:10:59 2014 +1000

    Revert "Add PEP 393-flags to strings and stub usage."

    This reverts commit c239f509521d1a0f9563bf9c5de0c4fb9a6a33ba.

commit f9bebb28ad52467f2f2d7a752bb033296b6c2f9b
Author: Chris Angelico <rosuav@gmail.com>
Date:   Sat Jun 7 15:41:48 2014 +1000

    Whitespace fixes

commit 279de0c8eb3cb186914799ccc5ee94ea97f56de4
Author: Chris Angelico <rosuav@gmail.com>
Date:   Sat Jun 7 15:28:35 2014 +1000

    Formatting/layout improvements - introduce macros for UTF-8 byte detection, add braces. No functional changes.

commit f1911f53d56da809c97b07245f5728a419e8fb30
Author: Chris Angelico <rosuav@gmail.com>
Date:   Sat Jun 7 11:56:02 2014 +1000

    Make chr() Unicode-aware

commit f51ad737b48ac04c161197a4012821d50885c4c7
Author: Chris Angelico <rosuav@gmail.com>
Date:   Sat Jun 7 11:44:07 2014 +1000

    Make a string's repr Unicode-aware

commit 01bd68684611585d437982dccdf05b33cbedc630
Author: Chris Angelico <rosuav@gmail.com>
Date:   Sat Jun 7 11:33:43 2014 +1000

    Expand the Unicode tests

commit 7bc91904f899f8012089fc14a06495680a51e590
Author: Chris Angelico <rosuav@gmail.com>
Date:   Sat Jun 7 11:27:30 2014 +1000

    Record byte lengths for byte strings

commit bb132120717cf176dcfb26f87fa309378f76ab5f
Author: Chris Angelico <rosuav@gmail.com>
Date:   Sat Jun 7 11:25:06 2014 +1000

    Make ord() Unicode-aware

commit 03f0cbe9051b62192be97b59f84f63f9216668bf
Author: Chris Angelico <rosuav@gmail.com>
Date:   Sat Jun 7 10:24:35 2014 +1000

    Retain characters as UTF-8 encoded Unicode

commit e924659b85c001916a5ff7f4d1d8b3ebe2bf0c2f
Author: Chris Angelico <rosuav@gmail.com>
Date:   Sat Jun 7 08:37:27 2014 +1000

    Add support for \u and \U escapes, but not \N (with explanatory comment)

commit 231031ac5f0346e4ffcf9c4abec2bd33f566232c
Author: Chris Angelico <rosuav@gmail.com>
Date:   Sat Jun 7 05:09:35 2014 +1000

    Add character length to qstr

commit 6df1b946fb17d8d5df3d91b21cde627c3d4556a8
Author: Chris Angelico <rosuav@gmail.com>
Date:   Fri Jun 6 13:48:36 2014 +1000

    Add test of UTF-8 encoded source file resulting in properly formed string

commit 16429b81a8483cf25865ed11afd81a7d9c253c26
Author: Chris Angelico <rosuav@gmail.com>
Date:   Fri Jun 6 13:44:15 2014 +1000

    Make len(s) return character length (even though creation's still buggy)

commit cd2cf6663cc47831dbc97819ad5c50ad33f939d3
Author: Chris Angelico <rosuav@gmail.com>
Date:   Fri Jun 6 13:15:36 2014 +1000

    HACK - When indexing a qstr, count its charlen. Stupidly inefficient but POC.

    All tests pass now, though string creation is still buggy.

commit 47c234584d3358dfa6b4003d5e7264105d17b8f7
Author: Chris Angelico <rosuav@gmail.com>
Date:   Fri Jun 6 13:15:32 2014 +1000

    objstr: Record character length separately from byte length

    CAUTION: Buggy, may crash stuff - qstr needs equivalent functionality too

commit b0f41c72af27d3b361027146025877b3d7e8785c
Author: Chris Angelico <rosuav@gmail.com>
Date:   Fri Jun 6 05:37:36 2014 +1000

    Beginnings of UTF-8 support - construct strings from that many UTF-8-encoded chars, and subscript bytes the same way

commit 89452be641674601e9bfce86dc71c17c3140a6cf
Author: Chris Angelico <rosuav@gmail.com>
Date:   Fri Jun 6 05:28:47 2014 +1000

    Update comments - now aiming for UTF-8 rather than PEP 393 strings

commit c239f509521d1a0f9563bf9c5de0c4fb9a6a33ba
Author: Chris Angelico <rosuav@gmail.com>
Date:   Wed Jun 4 05:28:12 2014 +1000

    Add PEP 393-flags to strings and stub usage.

    The test suite all passes, but nothing has actually been changed.
This commit is contained in:
Chris Angelico 2014-06-04 05:28:12 +10:00 committed by Paul Sokolovsky
parent 83865347db
commit 64b468d873
1 changed files with 130 additions and 24 deletions
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154
py/objstrunicode.c
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@ -64,7 +64,7 @@ STATIC bool is_str_or_bytes(mp_obj_t o) {
/******************************************************************************/
/* str */
void mp_str_print_quoted(void (*print)(void *env, const char *fmt, ...), void *env, const byte *str_data, uint str_len) {
void mp_str_print_quoted(void (*print)(void *env, const char *fmt, ...), void *env, const byte *str_data, uint 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;
@ -80,21 +80,33 @@ void mp_str_print_quoted(void (*print)(void *env, const char *fmt, ...), void *e
quote_char = '"';
}
print(env, "%c", quote_char);
for (const byte *s = str_data, *top = str_data + str_len; s < top; s++) {
if (*s == quote_char) {
print(env, "\\%c", quote_char);
} else if (*s == '\\') {
print(env, "\\\\");
} else if (32 <= *s && *s <= 126) {
print(env, "%c", *s);
} else if (*s == '\n') {
print(env, "\\n");
} else if (*s == '\r') {
print(env, "\\r");
} else if (*s == '\t') {
print(env, "\\t");
const char *s = (const char *)str_data, *top = (const char *)str_data + str_len;
while (s < top) {
unichar ch;
if (is_bytes) {
ch = *(unsigned char *)s++; // Don't sign-extend bytes
} else {
print(env, "\\x%02x", *s);
ch = utf8_get_char(s);
s = utf8_next_char(s);
}
if (ch == quote_char) {
print(env, "\\%c", quote_char);
} else if (ch == '\\') {
print(env, "\\\\");
} else if (32 <= ch && ch <= 126) {
print(env, "%c", ch);
} else if (ch == '\n') {
print(env, "\\n");
} else if (ch == '\r') {
print(env, "\\r");
} else if (ch == '\t') {
print(env, "\\t");
} else if (ch < 0x100) {
print(env, "\\x%02x", ch);
} else if (ch < 0x10000) {
print(env, "\\u%04x", ch);
} else {
print(env, "\\U%08x", ch);
}
}
print(env, "%c", quote_char);
@ -109,7 +121,7 @@ STATIC void str_print(void (*print)(void *env, const char *fmt, ...), void *env,
if (is_bytes) {
print(env, "b");
}
mp_str_print_quoted(print, env, str_data, str_len);
mp_str_print_quoted(print, env, str_data, str_len, is_bytes);
}
}
@ -348,6 +360,59 @@ uncomparable:
return MP_OBJ_NULL; // op not supported
}
// Convert an index into a pointer to its lead byte. Out of bounds indexing will raise IndexError or
// be capped to the first/last character of the string, depending on is_slice.
STATIC const char *str_index_to_ptr(const char *self_data, uint self_len, mp_obj_t index, bool is_slice) {
machine_int_t i;
// Copied from mp_get_index; I don't want bounds checking, just give me
// the integer as-is. (I can't bounds-check without scanning the whole
// string; an out-of-bounds index will be caught in the loops below.)
if (MP_OBJ_IS_SMALL_INT(index)) {
i = MP_OBJ_SMALL_INT_VALUE(index);
} else if (!mp_obj_get_int_maybe(index, &i)) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "string indices must be integers, not %s", mp_obj_get_type_str(index)));
}
const char *s, *top = self_data + self_len;
if (i < 0)
{
// Negative indexing is performed by counting from the end of the string.
for (s = top - 1; i; --s) {
if (s < self_data) {
if (is_slice) {
return self_data;
}
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_IndexError, "string index out of range"));
}
if (!UTF8_IS_CONT(*s)) {
++i;
}
}
++s;
} else if (!i) {
return self_data; // Shortcut - str[0] is its base pointer
} else {
// Positive indexing, correspondingly, counts from the start of the string.
// It's assumed that negative indexing will generally be used with small
// absolute values (eg str[-1], not str[-1000000]), which means it'll be
// more efficient this way.
for (s = self_data; true; ++s) {
if (s >= top) {
if (is_slice) {
return top;
}
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_IndexError, "string index out of range"));
}
while (UTF8_IS_CONT(*s)) {
++s;
}
if (!i--) {
return s;
}
}
}
return s;
}
STATIC mp_obj_t str_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);
@ -355,20 +420,61 @@ STATIC mp_obj_t str_subscr(mp_obj_t self_in, mp_obj_t index, mp_obj_t value) {
// 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_obj_t ostart, ostop, ostep;
mp_obj_slice_get(index, &ostart, &ostop, &ostep);
if (ostep != mp_const_none && ostep != MP_OBJ_NEW_SMALL_INT(1)) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_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);
if (type == &mp_type_bytes) {
machine_int_t start = 0, stop = self_len;
if (ostart != mp_const_none) {
start = MP_OBJ_SMALL_INT_VALUE(ostart);
if (start < 0) {
start = self_len + start;
}
}
if (ostop != mp_const_none) {
stop = MP_OBJ_SMALL_INT_VALUE(ostop);
if (stop < 0) {
stop = self_len + stop;
}
}
return mp_obj_new_str_of_type(type, self_data + start, stop - start);
}
const char *pstart, *pstop;
if (ostart != mp_const_none) {
pstart = str_index_to_ptr((const char *)self_data, self_len, ostart, true);
} else {
pstart = (const char *)self_data;
}
if (ostop != mp_const_none) {
// pstop will point just after the stop character. This depends on
// the \0 at the end of the string.
pstop = str_index_to_ptr((const char *)self_data, self_len, ostop, true);
} else {
pstop = (const char *)self_data + self_len;
}
if (pstop < pstart) {
return MP_OBJ_NEW_QSTR(MP_QSTR_);
}
return mp_obj_new_str_of_type(type, (const byte *)pstart, pstop - pstart);
}
#endif
uint index_val = mp_get_index(type, self_len, index, false);
if (type == &mp_type_bytes) {
uint index_val = mp_get_index(type, self_len, index, false);
return MP_OBJ_NEW_SMALL_INT((mp_small_int_t)self_data[index_val]);
} else {
return mp_obj_new_str((char*)self_data + index_val, 1, true);
}
const char *s = str_index_to_ptr((const char *)self_data, self_len, index, false);
int len = 1;
if (UTF8_IS_NONASCII(*s)) {
// Count the number of 1 bits (after the first)
for (char mask = 0x40; *s & mask; mask >>= 1) {
++len;
}
}
return mp_obj_new_str(s, len, true); // This will create a one-character string
} else {
return MP_OBJ_NULL; // op not supported
}
@ -1800,8 +1906,8 @@ uint mp_obj_str_get_hash(mp_obj_t self_in) {
uint mp_obj_str_get_len(mp_obj_t self_in) {
// TODO This has a double check for the type, one in obj.c and one here
if (MP_OBJ_IS_STR(self_in) || MP_OBJ_IS_TYPE(self_in, &mp_type_bytes)) {
GET_STR_LEN(self_in, l);
return l;
GET_STR_DATA_LEN(self_in, self_data, self_len);
return unichar_charlen((const char *)self_data, self_len);
} else {
bad_implicit_conversion(self_in);
}