/src/cpython/Parser/tokenizer/helpers.c

Source
#include "Python.h"
#include "errcode.h"
#include "pycore_runtime.h"       // _Py_ID()
#include "pycore_token.h"
#include "pycore_tuple.h"         // _PyTuple_FromPair

#include "../lexer/state.h"


/* ############## ERRORS ############## */

/* Convert a 1-based column in bytes into a 1-based column in characters.
   The line is UTF-8 encoded, so it is enough to skip continuation bytes. */
static int
byte_col_to_char_col(const char *line, int byte_col)
{
    int char_col = 1;
    for (int i = 0; i < byte_col - 1; i++) {
        if ((line[i] & 0xC0) != 0x80) {
            char_col++;
        }
    }
    return char_col;
}

static int
_syntaxerror_range(struct tok_state *tok, const char *line,
                   Py_ssize_t cursor, int lineno, const char *format,
                   int col_offset, int end_col_offset,
                   va_list vargs)
{
    // In release builds, we don't want to overwrite a previous error, but in debug builds we
    // want to fail if we are not doing it so we can fix it.
    assert(tok->done != E_ERROR);
    if (tok->done == E_ERROR) {
        return ERRORTOKEN;
    }
    PyObject *errmsg, *errtext, *args;
    errmsg = PyUnicode_FromFormatV(format, vargs);
    if (!errmsg) {
        goto error;
    }

    errtext = PyUnicode_DecodeUTF8(line, cursor,
                                   "replace");
    if (!errtext) {
        goto error;
    }

    if (col_offset == -1) {
        col_offset = (int)PyUnicode_GET_LENGTH(errtext);
    }
    else if (col_offset > 0) {
        col_offset = byte_col_to_char_col(line, col_offset);
    }
    if (end_col_offset == -1) {
        end_col_offset = col_offset;
    }
    else if (end_col_offset > 0) {
        end_col_offset = byte_col_to_char_col(line, end_col_offset);
    }

    Py_ssize_t line_len = strcspn(line, "\n");
    if (line_len != cursor) {
        Py_DECREF(errtext);
        errtext = PyUnicode_DecodeUTF8(line, line_len,
                                       "replace");
    }
    if (!errtext) {
        goto error;
    }

    args = Py_BuildValue("(O(OiiNii))", errmsg,
                         tok->filename ? tok->filename : Py_None,
                         lineno, col_offset, errtext,
                         lineno, end_col_offset);
    if (args) {
        PyErr_SetObject(PyExc_SyntaxError, args);
        Py_DECREF(args);
    }

error:
    Py_XDECREF(errmsg);
    tok->done = E_ERROR;
    return ERRORTOKEN;
}

int
_PyTokenizer_syntaxerror(struct tok_state *tok, const char *format, ...)
{
    // These errors are cleaned on startup. Todo: Fix it.
    va_list vargs;
    va_start(vargs, format);
    int ret = _syntaxerror_range(
        tok, _PyTok_SourcePointer(&tok->source, tok->line_start),
        tok->cur - tok->line_start, tok->lineno, format, -1, -1, vargs);
    va_end(vargs);
    return ret;
}

int
_PyTokenizer_syntaxerror_known_range(struct tok_state *tok,
                        int col_offset, int end_col_offset,
                        const char *format, ...)
{
    va_list vargs;
    va_start(vargs, format);
    int ret = _syntaxerror_range(
        tok, _PyTok_SourcePointer(&tok->source, tok->line_start),
        tok->cur - tok->line_start, tok->lineno,
        format, col_offset, end_col_offset, vargs);
    va_end(vargs);
    return ret;
}

int
_PyTokenizer_syntaxerror_at(struct tok_state *tok, const char *line,
                             Py_ssize_t cursor, int lineno,
                             int col_offset, int end_col_offset,
                             const char *format, ...)
{
    va_list vargs;
    va_start(vargs, format);
    int ret = _syntaxerror_range(tok, line, cursor, lineno, format,
                                col_offset, end_col_offset, vargs);
    va_end(vargs);
    return ret;
}

int
_PyTokenizer_indenterror(struct tok_state *tok)
{
    tok->done = E_TABSPACE;
    tok->cur = tok->inp;
    return ERRORTOKEN;
}

int
_PyTokenizer_warn_invalid_escape_sequence(struct tok_state *tok, int first_invalid_escape_char)
{
    PyObject *msg = PyUnicode_FromFormat(
        "\"\\%c\" is an invalid escape sequence. "
        "Such sequences will not work in the future. "
        "Did you mean \"\\\\%c\"? A raw string is also an option.",
        (char) first_invalid_escape_char,
        (char) first_invalid_escape_char
    );

    if (msg == NULL) {
        return -1;
    }

    if (PyErr_WarnExplicitObject(PyExc_SyntaxWarning, msg, tok->filename,
                                 tok->lineno, tok->module, NULL) < 0) {
        Py_DECREF(msg);

        if (PyErr_ExceptionMatches(PyExc_SyntaxWarning)) {
            /* Replace the SyntaxWarning exception with a SyntaxError
               to get a more accurate error report */
            PyErr_Clear();

            return _PyTokenizer_syntaxerror(tok,
                "\"\\%c\" is an invalid escape sequence. "
                "Did you mean \"\\\\%c\"? A raw string is also an option.",
                (char) first_invalid_escape_char,
                (char) first_invalid_escape_char);
        }

        return -1;
    }

    Py_DECREF(msg);
    return 0;
}

void
_PyTokenizer_raise_init_error(PyObject *filename)
{
    if (!(PyErr_ExceptionMatches(PyExc_LookupError)
          || PyErr_ExceptionMatches(PyExc_SyntaxError)
          || PyErr_ExceptionMatches(PyExc_ValueError)
          || PyErr_ExceptionMatches(PyExc_UnicodeDecodeError))) {
        return;
    }
    PyObject *errstr = NULL;
    PyObject *tuple = NULL;
    PyObject *type;
    PyObject *value;
    PyObject *tback;
    PyErr_Fetch(&type, &value, &tback);
    if (PyErr_GivenExceptionMatches(value, PyExc_SyntaxError)) {
        if (PyObject_SetAttr(value, &_Py_ID(filename), filename)) {
            goto error;
        }
        PyErr_Restore(type, value, tback);
        return;
    }
    errstr = PyObject_Str(value);
    if (!errstr) {
        goto error;
    }

    PyObject *tmp = Py_BuildValue("(OiiO)", filename, 0, -1, Py_None);
    if (!tmp) {
        goto error;
    }

    tuple = _PyTuple_FromPair(errstr, tmp);
    Py_DECREF(tmp);
    if (!tuple) {
        goto error;
    }
    PyErr_SetObject(PyExc_SyntaxError, tuple);

error:
    Py_XDECREF(type);
    Py_XDECREF(value);
    Py_XDECREF(tback);
    Py_XDECREF(errstr);
    Py_XDECREF(tuple);
}

int
_PyTokenizer_parser_warn(struct tok_state *tok, PyObject *category, const char *format, ...)
{
    PyObject *errmsg;
    va_list vargs;
    va_start(vargs, format);
    errmsg = PyUnicode_FromFormatV(format, vargs);
    va_end(vargs);
    if (!errmsg) {
        goto error;
    }

    if (PyErr_WarnExplicitObject(category, errmsg, tok->filename,
                                 tok->lineno, tok->module, NULL) < 0) {
        if (PyErr_ExceptionMatches(category)) {
            /* Replace the DeprecationWarning exception with a SyntaxError
               to get a more accurate error report */
            PyErr_Clear();
            _PyTokenizer_syntaxerror(tok, "%U", errmsg);
        }
        goto error;
    }
    Py_DECREF(errmsg);
    return 0;

error:
    Py_XDECREF(errmsg);
    tok->done = E_ERROR;
    return -1;
}


/* Check whether the characters at s start a valid
   UTF-8 sequence. Return the number of characters forming
   the sequence if yes, 0 if not.  The special cases match
   those in stringlib/codecs.h:utf8_decode.
*/
static int
valid_utf8(const unsigned char* s)
{
    int expected = 0;
    int length;
    if (*s < 0x80) {
        /* single-byte code */
        return 1;
    }
    else if (*s < 0xE0) {
        /* \xC2\x80-\xDF\xBF -- 0080-07FF */
        if (*s < 0xC2) {
            /* invalid sequence
               \x80-\xBF -- continuation byte
               \xC0-\xC1 -- fake 0000-007F */
            return 0;
        }
        expected = 1;
    }
    else if (*s < 0xF0) {
        /* \xE0\xA0\x80-\xEF\xBF\xBF -- 0800-FFFF */
        if (*s == 0xE0 && *(s + 1) < 0xA0) {
            /* invalid sequence
               \xE0\x80\x80-\xE0\x9F\xBF -- fake 0000-0800 */
            return 0;
        }
        else if (*s == 0xED && *(s + 1) >= 0xA0) {
            /* Decoding UTF-8 sequences in range \xED\xA0\x80-\xED\xBF\xBF
               will result in surrogates in range D800-DFFF. Surrogates are
               not valid UTF-8 so they are rejected.
               See https://www.unicode.org/versions/Unicode5.2.0/ch03.pdf
               (table 3-7) and http://www.rfc-editor.org/rfc/rfc3629.txt */
            return 0;
        }
        expected = 2;
    }
    else if (*s < 0xF5) {
        /* \xF0\x90\x80\x80-\xF4\x8F\xBF\xBF -- 10000-10FFFF */
        if (*(s + 1) < 0x90 ? *s == 0xF0 : *s == 0xF4) {
            /* invalid sequence -- one of:
               \xF0\x80\x80\x80-\xF0\x8F\xBF\xBF -- fake 0000-FFFF
               \xF4\x90\x80\x80- -- 110000- overflow */
            return 0;
        }
        expected = 3;
    }
    else {
        /* invalid start byte */
        return 0;
    }
    length = expected + 1;
    for (int i = 1; i <= expected; i++) {
        if (s[i] < 0x80 || s[i] >= 0xC0) {
            return 0;
        }
    }
    return length;
}

int
_PyTokenizer_ensure_utf8(const char *line, struct tok_state *tok, int lineno)
{
    const char *badchar = NULL;
    const char *c;
    int length;
    const char *line_start = line;
    for (c = line; *c; c += length) {
        if (!(length = valid_utf8((const unsigned char *)c))) {
            badchar = c;
            break;
        }
        if (*c == '\n') {
            lineno++;
            line_start = c + 1;
        }
    }
    if (badchar) {
        _PyTokenizer_syntaxerror_at(
                tok, line_start, badchar - line_start + 1, lineno,
                -1, -1,
                "Non-UTF-8 code starting with '\\x%.2x'"
                "%s%V on line %i, "
                "but no encoding declared; "
                "see https://peps.python.org/pep-0263/ for details",
                (unsigned char)*badchar,
                tok->filename ? " in file " : "", tok->filename, "",
                lineno);
        return 0;
    }
    return 1;
}


/* ############## DEBUGGING STUFF ############## */

#ifdef Py_DEBUG
void
_PyTokenizer_print_escape(FILE *f, const char *s, Py_ssize_t size)
{
    if (s == NULL) {
        fputs("NULL", f);
        return;
    }
    putc('"', f);
    while (size-- > 0) {
        unsigned char c = *s++;
        switch (c) {
            case '\n': fputs("\\n", f); break;
            case '\r': fputs("\\r", f); break;
            case '\t': fputs("\\t", f); break;
            case '\f': fputs("\\f", f); break;
            case '\'': fputs("\\'", f); break;
            case '"': fputs("\\\"", f); break;
            default:
                if (0x20 <= c && c <= 0x7f)
                    putc(c, f);
                else
                    fprintf(f, "\\x%02x", c);
        }
    }
    putc('"', f);
}
#endif

Coverage Report

Created: 2026-10-17 06:15

Line	Count	Source
1		#include "Python.h"
2		#include "errcode.h"
3		#include "pycore_runtime.h" // _Py_ID()
4		#include "pycore_token.h"
5		#include "pycore_tuple.h" // _PyTuple_FromPair
6
7		#include "../lexer/state.h"
8
9
10		/* ############## ERRORS ############## */
11
12		/* Convert a 1-based column in bytes into a 1-based column in characters.
13		The line is UTF-8 encoded, so it is enough to skip continuation bytes. */
14		static int
15		byte_col_to_char_col(const char *line, int byte_col)
16	130	{
17	130	int char_col = 1;
18	13.7k	for (int i = 0; i < byte_col - 1; i++) {
19	13.6k	if ((line[i] & 0xC0) != 0x80) {
20	12.9k	char_col++;
21	12.9k	}
22	13.6k	}
23	130	return char_col;
24	130	}
25
26		static int
27		_syntaxerror_range(struct tok_state tok, const char line,
28		Py_ssize_t cursor, int lineno, const char *format,
29		int col_offset, int end_col_offset,
30		va_list vargs)
31	3.04k	{
32		// In release builds, we don't want to overwrite a previous error, but in debug builds we
33		// want to fail if we are not doing it so we can fix it.
34	3.04k	assert(tok->done != E_ERROR);
35	3.04k	if (tok->done == E_ERROR) {
36	0	return ERRORTOKEN;
37	0	}
38	3.04k	PyObject errmsg, errtext, *args;
39	3.04k	errmsg = PyUnicode_FromFormatV(format, vargs);
40	3.04k	if (!errmsg) {
41	0	goto error;
42	0	}
43
44	3.04k	errtext = PyUnicode_DecodeUTF8(line, cursor,
45	3.04k	"replace");
46	3.04k	if (!errtext) {
47	0	goto error;
48	0	}
49
50	3.04k	if (col_offset == -1) {
51	2.97k	col_offset = (int)PyUnicode_GET_LENGTH(errtext);
52	2.97k	}
53	68	else if (col_offset > 0) {
54	62	col_offset = byte_col_to_char_col(line, col_offset);
55	62	}
56	3.04k	if (end_col_offset == -1) {
57	2.97k	end_col_offset = col_offset;
58	2.97k	}
59	68	else if (end_col_offset > 0) {
60	68	end_col_offset = byte_col_to_char_col(line, end_col_offset);
61	68	}
62
63	3.04k	Py_ssize_t line_len = strcspn(line, "\n");
64	3.04k	if (line_len != cursor) {
65	2.24k	Py_DECREF(errtext);
66	2.24k	errtext = PyUnicode_DecodeUTF8(line, line_len,
67	2.24k	"replace");
68	2.24k	}
69	3.04k	if (!errtext) {
70	0	goto error;
71	0	}
72
73	3.04k	args = Py_BuildValue("(O(OiiNii))", errmsg,
74	3.04k	tok->filename ? tok->filename : Py_None,
75	3.04k	lineno, col_offset, errtext,
76	3.04k	lineno, end_col_offset);
77	3.04k	if (args) {
78	3.04k	PyErr_SetObject(PyExc_SyntaxError, args);
79	3.04k	Py_DECREF(args);
80	3.04k	}
81
82	3.04k	error:
83	3.04k	Py_XDECREF(errmsg);
84	3.04k	tok->done = E_ERROR;
85	3.04k	return ERRORTOKEN;
86	3.04k	}
87
88		int
89		_PyTokenizer_syntaxerror(struct tok_state tok, const char format, ...)
90	1.19k	{
91		// These errors are cleaned on startup. Todo: Fix it.
92	1.19k	va_list vargs;
93	1.19k	va_start(vargs, format);
94	1.19k	int ret = _syntaxerror_range(
95	1.19k	tok, _PyTok_SourcePointer(&tok->source, tok->line_start),
96	1.19k	tok->cur - tok->line_start, tok->lineno, format, -1, -1, vargs);
97	1.19k	va_end(vargs);
98	1.19k	return ret;
99	1.19k	}
100
101		int
102		_PyTokenizer_syntaxerror_known_range(struct tok_state *tok,
103		int col_offset, int end_col_offset,
104		const char *format, ...)
105	62	{
106	62	va_list vargs;
107	62	va_start(vargs, format);
108	62	int ret = _syntaxerror_range(
109	62	tok, _PyTok_SourcePointer(&tok->source, tok->line_start),
110	62	tok->cur - tok->line_start, tok->lineno,
111	62	format, col_offset, end_col_offset, vargs);
112	62	va_end(vargs);
113	62	return ret;
114	62	}
115
116		int
117		_PyTokenizer_syntaxerror_at(struct tok_state tok, const char line,
118		Py_ssize_t cursor, int lineno,
119		int col_offset, int end_col_offset,
120		const char *format, ...)
121	1.79k	{
122	1.79k	va_list vargs;
123	1.79k	va_start(vargs, format);
124	1.79k	int ret = _syntaxerror_range(tok, line, cursor, lineno, format,
125	1.79k	col_offset, end_col_offset, vargs);
126	1.79k	va_end(vargs);
127	1.79k	return ret;
128	1.79k	}
129
130		int
131		_PyTokenizer_indenterror(struct tok_state *tok)
132	3	{
133	3	tok->done = E_TABSPACE;
134	3	tok->cur = tok->inp;
135	3	return ERRORTOKEN;
136	3	}
137
138		int
139		_PyTokenizer_warn_invalid_escape_sequence(struct tok_state *tok, int first_invalid_escape_char)
140	1.12k	{
141	1.12k	PyObject *msg = PyUnicode_FromFormat(
142	1.12k	"\"\\%c\" is an invalid escape sequence. "
143	1.12k	"Such sequences will not work in the future. "
144	1.12k	"Did you mean \"\\\\%c\"? A raw string is also an option.",
145	1.12k	(char) first_invalid_escape_char,
146	1.12k	(char) first_invalid_escape_char
147	1.12k	);
148
149	1.12k	if (msg == NULL) {
150	0	return -1;
151	0	}
152
153	1.12k	if (PyErr_WarnExplicitObject(PyExc_SyntaxWarning, msg, tok->filename,
154	1.12k	tok->lineno, tok->module, NULL) < 0) {
155	0	Py_DECREF(msg);
156
157	0	if (PyErr_ExceptionMatches(PyExc_SyntaxWarning)) {
158		/* Replace the SyntaxWarning exception with a SyntaxError
159		to get a more accurate error report */
160	0	PyErr_Clear();
161
162	0	return _PyTokenizer_syntaxerror(tok,
163	0	"\"\\%c\" is an invalid escape sequence. "
164	0	"Did you mean \"\\\\%c\"? A raw string is also an option.",
165	0	(char) first_invalid_escape_char,
166	0	(char) first_invalid_escape_char);
167	0	}
168
169	0	return -1;
170	0	}
171
172	1.12k	Py_DECREF(msg);
173	1.12k	return 0;
174	1.12k	}
175
176		void
177		_PyTokenizer_raise_init_error(PyObject *filename)
178	2.52k	{
179	2.52k	if (!(PyErr_ExceptionMatches(PyExc_LookupError)
180	2.39k	\|\| PyErr_ExceptionMatches(PyExc_SyntaxError)
181	1.84k	\|\| PyErr_ExceptionMatches(PyExc_ValueError)
182	53	\|\| PyErr_ExceptionMatches(PyExc_UnicodeDecodeError))) {
183	53	return;
184	53	}
185	2.47k	PyObject *errstr = NULL;
186	2.47k	PyObject *tuple = NULL;
187	2.47k	PyObject *type;
188	2.47k	PyObject *value;
189	2.47k	PyObject *tback;
190	2.47k	PyErr_Fetch(&type, &value, &tback);
191	2.47k	if (PyErr_GivenExceptionMatches(value, PyExc_SyntaxError)) {
192	547	if (PyObject_SetAttr(value, &_Py_ID(filename), filename)) {
193	0	goto error;
194	0	}
195	547	PyErr_Restore(type, value, tback);
196	547	return;
197	547	}
198	1.92k	errstr = PyObject_Str(value);
199	1.92k	if (!errstr) {
200	0	goto error;
201	0	}
202
203	1.92k	PyObject *tmp = Py_BuildValue("(OiiO)", filename, 0, -1, Py_None);
204	1.92k	if (!tmp) {
205	0	goto error;
206	0	}
207
208	1.92k	tuple = _PyTuple_FromPair(errstr, tmp);
209	1.92k	Py_DECREF(tmp);
210	1.92k	if (!tuple) {
211	0	goto error;
212	0	}
213	1.92k	PyErr_SetObject(PyExc_SyntaxError, tuple);
214
215	1.92k	error:
216	1.92k	Py_XDECREF(type);
217	1.92k	Py_XDECREF(value);
218	1.92k	Py_XDECREF(tback);
219	1.92k	Py_XDECREF(errstr);
220	1.92k	Py_XDECREF(tuple);
221	1.92k	}
222
223		int
224		_PyTokenizer_parser_warn(struct tok_state tok, PyObject category, const char *format, ...)
225	9.72k	{
226	9.72k	PyObject *errmsg;
227	9.72k	va_list vargs;
228	9.72k	va_start(vargs, format);
229	9.72k	errmsg = PyUnicode_FromFormatV(format, vargs);
230	9.72k	va_end(vargs);
231	9.72k	if (!errmsg) {
232	0	goto error;
233	0	}
234
235	9.72k	if (PyErr_WarnExplicitObject(category, errmsg, tok->filename,
236	9.72k	tok->lineno, tok->module, NULL) < 0) {
237	0	if (PyErr_ExceptionMatches(category)) {
238		/* Replace the DeprecationWarning exception with a SyntaxError
239		to get a more accurate error report */
240	0	PyErr_Clear();
241	0	_PyTokenizer_syntaxerror(tok, "%U", errmsg);
242	0	}
243	0	goto error;
244	0	}
245	9.72k	Py_DECREF(errmsg);
246	9.72k	return 0;
247
248	0	error:
249	0	Py_XDECREF(errmsg);
250	0	tok->done = E_ERROR;
251	0	return -1;
252	9.72k	}
253
254
255		/* Check whether the characters at s start a valid
256		UTF-8 sequence. Return the number of characters forming
257		the sequence if yes, 0 if not. The special cases match
258		those in stringlib/codecs.h:utf8_decode.
259		*/
260		static int
261		valid_utf8(const unsigned char* s)
262	4.42M	{
263	4.42M	int expected = 0;
264	4.42M	int length;
265	4.42M	if (*s < 0x80) {
266		/* single-byte code */
267	4.41M	return 1;
268	4.41M	}
269	8.19k	else if (*s < 0xE0) {
270		/* \xC2\x80-\xDF\xBF -- 0080-07FF */
271	4.06k	if (*s < 0xC2) {
272		/* invalid sequence
273		\x80-\xBF -- continuation byte
274		\xC0-\xC1 -- fake 0000-007F */
275	145	return 0;
276	145	}
277	3.92k	expected = 1;
278	3.92k	}
279	4.13k	else if (*s < 0xF0) {
280		/* \xE0\xA0\x80-\xEF\xBF\xBF -- 0800-FFFF */
281	1.23k	if (s == 0xE0 && (s + 1) < 0xA0) {
282		/* invalid sequence
283		\xE0\x80\x80-\xE0\x9F\xBF -- fake 0000-0800 */
284	15	return 0;
285	15	}
286	1.22k	else if (s == 0xED && (s + 1) >= 0xA0) {
287		/* Decoding UTF-8 sequences in range \xED\xA0\x80-\xED\xBF\xBF
288		will result in surrogates in range D800-DFFF. Surrogates are
289		not valid UTF-8 so they are rejected.
290		See https://www.unicode.org/versions/Unicode5.2.0/ch03.pdf
291		(table 3-7) and http://www.rfc-editor.org/rfc/rfc3629.txt */
292	18	return 0;
293	18	}
294	1.20k	expected = 2;
295	1.20k	}
296	2.89k	else if (*s < 0xF5) {
297		/* \xF0\x90\x80\x80-\xF4\x8F\xBF\xBF -- 10000-10FFFF */
298	2.86k	if ((s + 1) < 0x90 ? s == 0xF0 : *s == 0xF4) {
299		/* invalid sequence -- one of:
300		\xF0\x80\x80\x80-\xF0\x8F\xBF\xBF -- fake 0000-FFFF
301		\xF4\x90\x80\x80- -- 110000- overflow */
302	31	return 0;
303	31	}
304	2.83k	expected = 3;
305	2.83k	}
306	32	else {
307		/* invalid start byte */
308	32	return 0;
309	32	}
310	7.95k	length = expected + 1;
311	22.2k	for (int i = 1; i <= expected; i++) {
312	14.5k	if (s[i] < 0x80 \|\| s[i] >= 0xC0) {
313	300	return 0;
314	300	}
315	14.5k	}
316	7.65k	return length;
317	7.95k	}
318
319		int
320		_PyTokenizer_ensure_utf8(const char line, struct tok_state tok, int lineno)
321	17.2k	{
322	17.2k	const char *badchar = NULL;
323	17.2k	const char *c;
324	17.2k	int length;
325	17.2k	const char *line_start = line;
326	4.43M	for (c = line; *c; c += length) {
327	4.42M	if (!(length = valid_utf8((const unsigned char *)c))) {
328	541	badchar = c;
329	541	break;
330	541	}
331	4.42M	if (*c == '\n') {
332	198k	lineno++;
333	198k	line_start = c + 1;
334	198k	}
335	4.42M	}
336	17.2k	if (badchar) {
337	541	_PyTokenizer_syntaxerror_at(
338	541	tok, line_start, badchar - line_start + 1, lineno,
339	541	-1, -1,
340	541	"Non-UTF-8 code starting with '\\x%.2x'"
341	541	"%s%V on line %i, "
342	541	"but no encoding declared; "
343	541	"see https://peps.python.org/pep-0263/ for details",
344	541	(unsigned char)*badchar,
345	541	tok->filename ? " in file " : "", tok->filename, "",
346	541	lineno);
347	541	return 0;
348	541	}
349	16.6k	return 1;
350	17.2k	}
351
352
353		/* ############## DEBUGGING STUFF ############## */
354
355		#ifdef Py_DEBUG
356		void
357		_PyTokenizer_print_escape(FILE f, const char s, Py_ssize_t size)
358		{
359		if (s == NULL) {
360		fputs("NULL", f);
361		return;
362		}
363		putc('"', f);
364		while (size-- > 0) {
365		unsigned char c = *s++;
366		switch (c) {
367		case '\n': fputs("\\n", f); break;
368		case '\r': fputs("\\r", f); break;
369		case '\t': fputs("\\t", f); break;
370		case '\f': fputs("\\f", f); break;
371		case '\'': fputs("\\'", f); break;
372		case '"': fputs("\\\"", f); break;
373		default:
374		if (0x20 <= c && c <= 0x7f)
375		putc(c, f);
376		else
377		fprintf(f, "\\x%02x", c);
378		}
379		}
380		putc('"', f);
381		}
382		#endif