mirror of
https://github.com/python/cpython
synced 2024-09-05 16:38:56 +00:00
bpo-25643: Refactor the C tokenizer into smaller, logical units (GH-25050)
This commit is contained in:
parent
fb1d01b963
commit
261a452a13
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@ -55,13 +55,13 @@ def test_line_continuation_EOF_from_file_bpo2180(self):
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file_name = script_helper.make_script(temp_dir, 'foo', '\\')
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rc, out, err = script_helper.assert_python_failure(file_name)
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self.assertIn(b'unexpected EOF while parsing', err)
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self.assertIn(b'line 2', err)
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self.assertIn(b'line 1', err)
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self.assertIn(b'\\', err)
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file_name = script_helper.make_script(temp_dir, 'foo', 'y = 6\\')
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rc, out, err = script_helper.assert_python_failure(file_name)
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self.assertIn(b'unexpected EOF while parsing', err)
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self.assertIn(b'line 2', err)
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self.assertIn(b'line 1', err)
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self.assertIn(b'y = 6\\', err)
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if __name__ == "__main__":
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@ -205,6 +205,23 @@ def test_utf8_bom_and_utf8_coding_line(self):
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b'print(ascii("\xc3\xa4"))\n')
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self.check_script_output(src, br"'\xe4'")
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def test_crlf(self):
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src = (b'print(ascii("""\r\n"""))\n')
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out = self.check_script_output(src, br"'\n'")
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def test_crcrlf(self):
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src = (b'print(ascii("""\r\r\n"""))\n')
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out = self.check_script_output(src, br"'\n\n'")
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def test_crcrcrlf(self):
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src = (b'print(ascii("""\r\r\r\n"""))\n')
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out = self.check_script_output(src, br"'\n\n\n'")
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def test_crcrcrlf2(self):
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src = (b'#coding:iso-8859-1\n'
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b'print(ascii("""\r\r\r\n"""))\n')
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out = self.check_script_output(src, br"'\n\n\n'")
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class BytesSourceEncodingTest(AbstractSourceEncodingTest, unittest.TestCase):
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@ -13,7 +13,6 @@
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#include "unicodeobject.h"
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#include "bytesobject.h"
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#include "fileobject.h"
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#include "codecs.h"
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#include "abstract.h"
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/* Alternate tab spacing */
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@ -75,7 +74,6 @@ tok_new(void)
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tok->altindstack[0] = 0;
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tok->decoding_state = STATE_INIT;
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tok->decoding_erred = 0;
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tok->read_coding_spec = 0;
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tok->enc = NULL;
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tok->encoding = NULL;
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tok->cont_line = 0;
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@ -164,14 +162,14 @@ get_coding_spec(const char *s, char **spec, Py_ssize_t size, struct tok_state *t
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}
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for (; i < size - 6; i++) { /* XXX inefficient search */
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const char* t = s + i;
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if (strncmp(t, "coding", 6) == 0) {
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if (memcmp(t, "coding", 6) == 0) {
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const char* begin = NULL;
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t += 6;
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if (t[0] != ':' && t[0] != '=')
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continue;
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do {
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t++;
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} while (t[0] == '\x20' || t[0] == '\t');
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} while (t[0] == ' ' || t[0] == '\t');
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begin = t;
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while (Py_ISALNUM(t[0]) ||
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@ -208,15 +206,14 @@ check_coding_spec(const char* line, Py_ssize_t size, struct tok_state *tok,
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int set_readline(struct tok_state *, const char *))
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{
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char *cs;
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int r = 1;
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if (tok->cont_line) {
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/* It's a continuation line, so it can't be a coding spec. */
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tok->read_coding_spec = 1;
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tok->decoding_state = STATE_NORMAL;
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return 1;
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}
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if (!get_coding_spec(line, &cs, size, tok))
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if (!get_coding_spec(line, &cs, size, tok)) {
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return 0;
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}
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if (!cs) {
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Py_ssize_t i;
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for (i = 0; i < size; i++) {
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@ -225,37 +222,33 @@ check_coding_spec(const char* line, Py_ssize_t size, struct tok_state *tok,
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if (line[i] != ' ' && line[i] != '\t' && line[i] != '\014') {
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/* Stop checking coding spec after a line containing
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* anything except a comment. */
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tok->read_coding_spec = 1;
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tok->decoding_state = STATE_NORMAL;
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break;
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}
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}
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return 1;
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}
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tok->read_coding_spec = 1;
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if (tok->encoding == NULL) {
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assert(tok->decoding_state == STATE_RAW);
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if (strcmp(cs, "utf-8") == 0) {
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tok->encoding = cs;
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} else {
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r = set_readline(tok, cs);
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if (r) {
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tok->encoding = cs;
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tok->decoding_state = STATE_NORMAL;
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}
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else {
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PyErr_Format(PyExc_SyntaxError,
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"encoding problem: %s", cs);
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if (tok->encoding == NULL) {
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assert(tok->decoding_readline == NULL);
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if (strcmp(cs, "utf-8") != 0 && !set_readline(tok, cs)) {
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error_ret(tok);
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PyErr_Format(PyExc_SyntaxError, "encoding problem: %s", cs);
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PyMem_Free(cs);
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return 0;
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}
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}
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tok->encoding = cs;
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} else { /* then, compare cs with BOM */
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r = (strcmp(tok->encoding, cs) == 0);
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if (!r)
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if (strcmp(tok->encoding, cs) != 0) {
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error_ret(tok);
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PyErr_Format(PyExc_SyntaxError,
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"encoding problem: %s with BOM", cs);
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PyMem_Free(cs);
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return 0;
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}
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return r;
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PyMem_Free(cs);
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}
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return 1;
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}
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/* See whether the file starts with a BOM. If it does,
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@ -270,7 +263,7 @@ check_bom(int get_char(struct tok_state *),
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{
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int ch1, ch2, ch3;
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ch1 = get_char(tok);
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tok->decoding_state = STATE_RAW;
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tok->decoding_state = STATE_SEEK_CODING;
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if (ch1 == EOF) {
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return 1;
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} else if (ch1 == 0xEF) {
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@ -324,7 +317,8 @@ check_bom(int get_char(struct tok_state *),
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return 1;
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}
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static int tok_concatenate_interactive_new_line(struct tok_state* tok, char* line) {
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static int
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tok_concatenate_interactive_new_line(struct tok_state *tok, const char *line) {
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assert(tok->fp_interactive);
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if (!line) {
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@ -360,73 +354,73 @@ static int tok_concatenate_interactive_new_line(struct tok_state* tok, char* lin
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1) NULL: need to call tok->decoding_readline to get a new line
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2) PyUnicodeObject *: decoding_feof has called tok->decoding_readline and
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stored the result in tok->decoding_buffer
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3) PyByteArrayObject *: previous call to fp_readl did not have enough room
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3) PyByteArrayObject *: previous call to tok_readline_recode did not have enough room
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(in the s buffer) to copy entire contents of the line read
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by tok->decoding_readline. tok->decoding_buffer has the overflow.
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In this case, fp_readl is called in a loop (with an expanded buffer)
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In this case, tok_readline_recode is called in a loop (with an expanded buffer)
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until the buffer ends with a '\n' (or until the end of the file is
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reached): see tok_nextc and its calls to decoding_fgets.
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reached): see tok_nextc and its calls to tok_reserve_buf.
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*/
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static char *
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fp_readl(char *s, int size, struct tok_state *tok)
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static int
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tok_reserve_buf(struct tok_state *tok, Py_ssize_t size)
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{
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PyObject* bufobj;
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Py_ssize_t cur = tok->cur - tok->buf;
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Py_ssize_t oldsize = tok->inp - tok->buf;
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Py_ssize_t newsize = oldsize + Py_MAX(size, oldsize >> 1);
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if (newsize > tok->end - tok->buf) {
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char *newbuf = tok->buf;
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Py_ssize_t start = tok->start == NULL ? -1 : tok->start - tok->buf;
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newbuf = (char *)PyMem_Realloc(newbuf, newsize);
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if (newbuf == NULL) {
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tok->done = E_NOMEM;
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return 0;
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}
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tok->buf = newbuf;
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tok->cur = tok->buf + cur;
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tok->inp = tok->buf + oldsize;
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tok->end = tok->buf + newsize;
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tok->start = start < 0 ? NULL : tok->buf + start;
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}
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return 1;
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}
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static int
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tok_readline_recode(struct tok_state *tok) {
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PyObject *line;
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const char *buf;
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Py_ssize_t buflen;
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/* Ask for one less byte so we can terminate it */
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assert(size > 0);
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size--;
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if (tok->decoding_buffer) {
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bufobj = tok->decoding_buffer;
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Py_INCREF(bufobj);
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}
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else
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{
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bufobj = _PyObject_CallNoArg(tok->decoding_readline);
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if (bufobj == NULL)
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goto error;
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}
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if (PyUnicode_CheckExact(bufobj))
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{
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buf = PyUnicode_AsUTF8AndSize(bufobj, &buflen);
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if (buf == NULL) {
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line = tok->decoding_buffer;
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if (line == NULL) {
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line = PyObject_CallNoArgs(tok->decoding_readline);
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if (line == NULL) {
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error_ret(tok);
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goto error;
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}
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}
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else
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{
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buf = PyByteArray_AsString(bufobj);
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if (buf == NULL) {
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goto error;
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}
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buflen = PyByteArray_GET_SIZE(bufobj);
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}
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Py_XDECREF(tok->decoding_buffer);
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if (buflen > size) {
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/* Too many chars, the rest goes into tok->decoding_buffer */
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tok->decoding_buffer = PyByteArray_FromStringAndSize(buf+size,
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buflen-size);
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if (tok->decoding_buffer == NULL)
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goto error;
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buflen = size;
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}
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else
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else {
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tok->decoding_buffer = NULL;
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memcpy(s, buf, buflen);
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s[buflen] = '\0';
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if (buflen == 0) /* EOF */
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s = NULL;
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Py_DECREF(bufobj);
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return s;
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}
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buf = PyUnicode_AsUTF8AndSize(line, &buflen);
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if (buf == NULL) {
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error_ret(tok);
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goto error;
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}
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if (!tok_reserve_buf(tok, buflen + 1)) {
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goto error;
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}
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memcpy(tok->inp, buf, buflen);
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tok->inp += buflen;
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*tok->inp = '\0';
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if (tok->fp_interactive &&
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tok_concatenate_interactive_new_line(tok, buf) == -1) {
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goto error;
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}
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Py_DECREF(line);
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return 1;
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error:
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Py_XDECREF(bufobj);
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return error_ret(tok);
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Py_XDECREF(line);
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return 0;
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}
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/* Set the readline function for TOK to a StreamReader's
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@ -527,45 +521,13 @@ static int valid_utf8(const unsigned char* s)
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return length;
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}
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/* Read a line of input from TOK. Determine encoding
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if necessary. */
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static char *
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decoding_fgets(char *s, int size, struct tok_state *tok)
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static int
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ensure_utf8(char *line, struct tok_state *tok)
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{
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char *line = NULL;
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int badchar = 0;
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for (;;) {
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if (tok->decoding_state == STATE_NORMAL) {
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/* We already have a codec associated with
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this input. */
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line = fp_readl(s, size, tok);
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break;
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} else if (tok->decoding_state == STATE_RAW) {
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/* We want a 'raw' read. */
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line = Py_UniversalNewlineFgets(s, size,
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tok->fp, NULL);
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break;
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} else {
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/* We have not yet determined the encoding.
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If an encoding is found, use the file-pointer
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reader functions from now on. */
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if (!check_bom(fp_getc, fp_ungetc, fp_setreadl, tok))
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return error_ret(tok);
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assert(tok->decoding_state != STATE_INIT);
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}
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}
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if (line != NULL && tok->lineno < 2 && !tok->read_coding_spec) {
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if (!check_coding_spec(line, strlen(line), tok, fp_setreadl)) {
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return error_ret(tok);
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}
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}
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/* The default encoding is UTF-8, so make sure we don't have any
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non-UTF-8 sequences in it. */
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if (line && !tok->encoding) {
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unsigned char *c;
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int length;
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for (c = (unsigned char *)line; *c; c += length)
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for (c = (unsigned char *)line; *c; c += length) {
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if (!(length = valid_utf8(c))) {
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badchar = *c;
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break;
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@ -580,35 +542,9 @@ decoding_fgets(char *s, int size, struct tok_state *tok)
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"but no encoding declared; "
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"see http://python.org/dev/peps/pep-0263/ for details",
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badchar, tok->filename, tok->lineno + 1);
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return error_ret(tok);
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return 0;
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}
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if (tok->fp_interactive &&
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tok_concatenate_interactive_new_line(tok, line) == -1) {
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return NULL;
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}
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return line;
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}
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static int
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decoding_feof(struct tok_state *tok)
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{
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if (tok->decoding_state != STATE_NORMAL) {
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return feof(tok->fp);
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} else {
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PyObject* buf = tok->decoding_buffer;
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if (buf == NULL) {
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buf = _PyObject_CallNoArg(tok->decoding_readline);
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if (buf == NULL) {
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error_ret(tok);
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return 1;
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} else {
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tok->decoding_buffer = buf;
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}
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}
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return PyObject_Length(buf) == 0;
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}
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}
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/* Fetch a byte from TOK, using the string buffer. */
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@ -736,12 +672,13 @@ decode_str(const char *input, int single, struct tok_state *tok)
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/* need to check line 1 and 2 separately since check_coding_spec
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assumes a single line as input */
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if (newl[0]) {
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if (!check_coding_spec(str, newl[0] - str, tok, buf_setreadl))
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return error_ret(tok);
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if (tok->enc == NULL && !tok->read_coding_spec && newl[1]) {
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if (!check_coding_spec(str, newl[0] - str, tok, buf_setreadl)) {
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return NULL;
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}
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if (tok->enc == NULL && tok->decoding_state != STATE_NORMAL && newl[1]) {
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if (!check_coding_spec(newl[0]+1, newl[1] - newl[0],
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tok, buf_setreadl))
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return error_ret(tok);
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return NULL;
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}
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}
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if (tok->enc != NULL) {
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@ -777,6 +714,8 @@ PyTokenizer_FromString(const char *str, int exec_input)
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return tok;
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}
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/* Set up tokenizer for UTF-8 string */
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struct tok_state *
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PyTokenizer_FromUTF8(const char *str, int exec_input)
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{
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@ -789,16 +728,14 @@ PyTokenizer_FromUTF8(const char *str, int exec_input)
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PyTokenizer_Free(tok);
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return NULL;
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}
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tok->decoding_state = STATE_RAW;
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tok->read_coding_spec = 1;
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tok->decoding_state = STATE_NORMAL;
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tok->enc = NULL;
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tok->str = translated;
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tok->encoding = (char *)PyMem_Malloc(6);
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tok->encoding = new_string("utf-8", 5, tok);
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if (!tok->encoding) {
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PyTokenizer_Free(tok);
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return NULL;
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}
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strcpy(tok->encoding, "utf-8");
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tok->buf = tok->cur = tok->inp = translated;
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tok->end = translated;
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@ -826,18 +763,16 @@ PyTokenizer_FromFile(FILE *fp, const char* enc,
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if (enc != NULL) {
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/* Must copy encoding declaration since it
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gets copied into the parse tree. */
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tok->encoding = PyMem_Malloc(strlen(enc)+1);
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tok->encoding = new_string(enc, strlen(enc), tok);
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if (!tok->encoding) {
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PyTokenizer_Free(tok);
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return NULL;
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}
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strcpy(tok->encoding, enc);
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tok->decoding_state = STATE_NORMAL;
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}
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return tok;
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}
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/* Free a tok_state structure */
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void
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|
@ -861,42 +796,59 @@ PyTokenizer_Free(struct tok_state *tok)
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PyMem_Free(tok);
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}
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|
||||
/* Get next char, updating state; error code goes into tok->done */
|
||||
static int
|
||||
tok_readline_raw(struct tok_state *tok)
|
||||
{
|
||||
do {
|
||||
if (!tok_reserve_buf(tok, BUFSIZ)) {
|
||||
return 0;
|
||||
}
|
||||
char *line = Py_UniversalNewlineFgets(tok->inp,
|
||||
(int)(tok->end - tok->inp),
|
||||
tok->fp, NULL);
|
||||
if (line == NULL) {
|
||||
return 1;
|
||||
}
|
||||
if (tok->fp_interactive &&
|
||||
tok_concatenate_interactive_new_line(tok, line) == -1) {
|
||||
return 0;
|
||||
}
|
||||
tok->inp = strchr(tok->inp, '\0');
|
||||
} while (tok->inp[-1] != '\n');
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int
|
||||
tok_nextc(struct tok_state *tok)
|
||||
{
|
||||
for (;;) {
|
||||
if (tok->cur != tok->inp) {
|
||||
return Py_CHARMASK(*tok->cur++); /* Fast path */
|
||||
}
|
||||
if (tok->done != E_OK)
|
||||
return EOF;
|
||||
if (tok->fp == NULL) {
|
||||
tok_underflow_string(struct tok_state *tok) {
|
||||
char *end = strchr(tok->inp, '\n');
|
||||
if (end != NULL)
|
||||
if (end != NULL) {
|
||||
end++;
|
||||
}
|
||||
else {
|
||||
end = strchr(tok->inp, '\0');
|
||||
if (end == tok->inp) {
|
||||
tok->done = E_EOF;
|
||||
return EOF;
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
if (tok->start == NULL)
|
||||
if (tok->start == NULL) {
|
||||
tok->buf = tok->cur;
|
||||
}
|
||||
tok->line_start = tok->cur;
|
||||
tok->lineno++;
|
||||
tok->inp = end;
|
||||
return Py_CHARMASK(*tok->cur++);
|
||||
}
|
||||
if (tok->prompt != NULL) {
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int
|
||||
tok_underflow_interactive(struct tok_state *tok) {
|
||||
char *newtok = PyOS_Readline(stdin, stdout, tok->prompt);
|
||||
if (newtok != NULL) {
|
||||
char *translated = translate_newlines(newtok, 0, tok);
|
||||
PyMem_Free(newtok);
|
||||
if (translated == NULL)
|
||||
return EOF;
|
||||
if (translated == NULL) {
|
||||
return 0;
|
||||
}
|
||||
newtok = translated;
|
||||
}
|
||||
if (tok->encoding && newtok && *newtok) {
|
||||
|
@ -905,9 +857,9 @@ tok_nextc(struct tok_state *tok)
|
|||
const char* buf;
|
||||
PyObject *u = translate_into_utf8(newtok, tok->encoding);
|
||||
PyMem_Free(newtok);
|
||||
if (!u) {
|
||||
if (u == NULL) {
|
||||
tok->done = E_DECODE;
|
||||
return EOF;
|
||||
return 0;
|
||||
}
|
||||
buflen = PyBytes_GET_SIZE(u);
|
||||
buf = PyBytes_AS_STRING(u);
|
||||
|
@ -915,51 +867,43 @@ tok_nextc(struct tok_state *tok)
|
|||
if (newtok == NULL) {
|
||||
Py_DECREF(u);
|
||||
tok->done = E_NOMEM;
|
||||
return EOF;
|
||||
return 0;
|
||||
}
|
||||
strcpy(newtok, buf);
|
||||
Py_DECREF(u);
|
||||
}
|
||||
if (tok->fp_interactive &&
|
||||
tok_concatenate_interactive_new_line(tok, newtok) == -1) {
|
||||
return EOF;
|
||||
PyMem_Free(newtok);
|
||||
return 0;
|
||||
}
|
||||
if (tok->nextprompt != NULL)
|
||||
if (tok->nextprompt != NULL) {
|
||||
tok->prompt = tok->nextprompt;
|
||||
if (newtok == NULL)
|
||||
}
|
||||
if (newtok == NULL) {
|
||||
tok->done = E_INTR;
|
||||
}
|
||||
else if (*newtok == '\0') {
|
||||
PyMem_Free(newtok);
|
||||
tok->done = E_EOF;
|
||||
}
|
||||
else if (tok->start != NULL) {
|
||||
size_t start = tok->start - tok->buf;
|
||||
size_t oldlen = tok->cur - tok->buf;
|
||||
size_t newlen = oldlen + strlen(newtok);
|
||||
Py_ssize_t cur_multi_line_start = tok->multi_line_start - tok->buf;
|
||||
char *buf = tok->buf;
|
||||
buf = (char *)PyMem_Realloc(buf, newlen+1);
|
||||
size_t size = strlen(newtok);
|
||||
tok->lineno++;
|
||||
if (buf == NULL) {
|
||||
if (!tok_reserve_buf(tok, size + 1)) {
|
||||
PyMem_Free(tok->buf);
|
||||
tok->buf = NULL;
|
||||
PyMem_Free(newtok);
|
||||
tok->done = E_NOMEM;
|
||||
return EOF;
|
||||
return 0;
|
||||
}
|
||||
tok->buf = buf;
|
||||
tok->cur = tok->buf + oldlen;
|
||||
tok->multi_line_start = tok->buf + cur_multi_line_start;
|
||||
tok->line_start = tok->cur;
|
||||
strcpy(tok->buf + oldlen, newtok);
|
||||
memcpy(tok->cur, newtok, size + 1);
|
||||
PyMem_Free(newtok);
|
||||
tok->inp = tok->buf + newlen;
|
||||
tok->end = tok->inp + 1;
|
||||
tok->start = tok->buf + start;
|
||||
tok->inp += size;
|
||||
tok->multi_line_start = tok->buf + cur_multi_line_start;
|
||||
}
|
||||
else {
|
||||
tok->lineno++;
|
||||
if (tok->buf != NULL)
|
||||
PyMem_Free(tok->buf);
|
||||
tok->buf = newtok;
|
||||
tok->cur = tok->buf;
|
||||
|
@ -967,105 +911,138 @@ tok_nextc(struct tok_state *tok)
|
|||
tok->inp = strchr(tok->buf, '\0');
|
||||
tok->end = tok->inp + 1;
|
||||
}
|
||||
}
|
||||
else {
|
||||
int done = 0;
|
||||
Py_ssize_t cur = 0;
|
||||
char *pt;
|
||||
if (tok->start == NULL) {
|
||||
if (tok->buf == NULL) {
|
||||
tok->buf = (char *)
|
||||
PyMem_Malloc(BUFSIZ);
|
||||
if (tok->buf == NULL) {
|
||||
tok->done = E_NOMEM;
|
||||
return EOF;
|
||||
}
|
||||
tok->end = tok->buf + BUFSIZ;
|
||||
}
|
||||
if (decoding_fgets(tok->buf, (int)(tok->end - tok->buf),
|
||||
tok) == NULL) {
|
||||
if (!tok->decoding_erred && !(tok->done == E_NOMEM))
|
||||
tok->done = E_EOF;
|
||||
done = 1;
|
||||
}
|
||||
else {
|
||||
tok->done = E_OK;
|
||||
tok->inp = strchr(tok->buf, '\0');
|
||||
done = tok->inp == tok->buf || tok->inp[-1] == '\n';
|
||||
}
|
||||
}
|
||||
else {
|
||||
cur = tok->cur - tok->buf;
|
||||
if (decoding_feof(tok)) {
|
||||
tok->done = E_EOF;
|
||||
done = 1;
|
||||
}
|
||||
else
|
||||
tok->done = E_OK;
|
||||
}
|
||||
tok->lineno++;
|
||||
/* Read until '\n' or EOF */
|
||||
while (!done) {
|
||||
Py_ssize_t curstart = tok->start == NULL ? -1 :
|
||||
tok->start - tok->buf;
|
||||
Py_ssize_t cur_multi_line_start = tok->multi_line_start - tok->buf;
|
||||
Py_ssize_t curvalid = tok->inp - tok->buf;
|
||||
Py_ssize_t newsize = curvalid + BUFSIZ;
|
||||
char *newbuf = tok->buf;
|
||||
newbuf = (char *)PyMem_Realloc(newbuf,
|
||||
newsize);
|
||||
if (newbuf == NULL) {
|
||||
tok->done = E_NOMEM;
|
||||
tok->cur = tok->inp;
|
||||
return EOF;
|
||||
}
|
||||
tok->buf = newbuf;
|
||||
tok->cur = tok->buf + cur;
|
||||
tok->multi_line_start = tok->buf + cur_multi_line_start;
|
||||
tok->line_start = tok->cur;
|
||||
tok->inp = tok->buf + curvalid;
|
||||
tok->end = tok->buf + newsize;
|
||||
tok->start = curstart < 0 ? NULL :
|
||||
tok->buf + curstart;
|
||||
if (decoding_fgets(tok->inp,
|
||||
(int)(tok->end - tok->inp),
|
||||
tok) == NULL) {
|
||||
/* Break out early on decoding
|
||||
errors, as tok->buf will be NULL
|
||||
*/
|
||||
if (tok->decoding_erred)
|
||||
return EOF;
|
||||
/* Last line does not end in \n,
|
||||
fake one */
|
||||
if (tok->inp[-1] != '\n')
|
||||
strcpy(tok->inp, "\n");
|
||||
}
|
||||
tok->inp = strchr(tok->inp, '\0');
|
||||
done = tok->inp[-1] == '\n';
|
||||
}
|
||||
if (tok->buf != NULL) {
|
||||
tok->cur = tok->buf + cur;
|
||||
tok->line_start = tok->cur;
|
||||
/* replace "\r\n" with "\n" */
|
||||
/* For Mac leave the \r, giving a syntax error */
|
||||
pt = tok->inp - 2;
|
||||
if (pt >= tok->buf && *pt == '\r') {
|
||||
*pt++ = '\n';
|
||||
*pt = '\0';
|
||||
tok->inp = pt;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (tok->done != E_OK) {
|
||||
if (tok->prompt != NULL)
|
||||
if (tok->prompt != NULL) {
|
||||
PySys_WriteStderr("\n");
|
||||
tok->cur = tok->inp;
|
||||
return EOF;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
/*NOTREACHED*/
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int
|
||||
tok_underflow_file(struct tok_state *tok) {
|
||||
if (tok->start == NULL) {
|
||||
tok->cur = tok->inp = tok->buf;
|
||||
}
|
||||
if (tok->decoding_state == STATE_INIT) {
|
||||
/* We have not yet determined the encoding.
|
||||
If an encoding is found, use the file-pointer
|
||||
reader functions from now on. */
|
||||
if (!check_bom(fp_getc, fp_ungetc, fp_setreadl, tok)) {
|
||||
error_ret(tok);
|
||||
return 0;
|
||||
}
|
||||
assert(tok->decoding_state != STATE_INIT);
|
||||
}
|
||||
/* Read until '\n' or EOF */
|
||||
if (tok->decoding_readline != NULL) {
|
||||
/* We already have a codec associated with this input. */
|
||||
if (!tok_readline_recode(tok)) {
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
else {
|
||||
/* We want a 'raw' read. */
|
||||
if (!tok_readline_raw(tok)) {
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
if (tok->inp == tok->cur) {
|
||||
tok->done = E_EOF;
|
||||
return 0;
|
||||
}
|
||||
if (tok->inp[-1] != '\n') {
|
||||
/* Last line does not end in \n, fake one */
|
||||
*tok->inp++ = '\n';
|
||||
*tok->inp = '\0';
|
||||
}
|
||||
|
||||
tok->lineno++;
|
||||
if (tok->decoding_state != STATE_NORMAL) {
|
||||
if (tok->lineno > 2) {
|
||||
tok->decoding_state = STATE_NORMAL;
|
||||
}
|
||||
else if (!check_coding_spec(tok->cur, tok->end - tok->cur,
|
||||
tok, fp_setreadl))
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
/* The default encoding is UTF-8, so make sure we don't have any
|
||||
non-UTF-8 sequences in it. */
|
||||
if (!tok->encoding
|
||||
&& (tok->decoding_state != STATE_NORMAL || tok->lineno >= 2)) {
|
||||
if (!ensure_utf8(tok->cur, tok)) {
|
||||
error_ret(tok);
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
assert(tok->done == E_OK);
|
||||
return tok->done == E_OK;
|
||||
}
|
||||
|
||||
static void
|
||||
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);
|
||||
}
|
||||
|
||||
/* Get next char, updating state; error code goes into tok->done */
|
||||
|
||||
static int
|
||||
tok_nextc(struct tok_state *tok)
|
||||
{
|
||||
int rc;
|
||||
for (;;) {
|
||||
if (tok->cur != tok->inp) {
|
||||
return Py_CHARMASK(*tok->cur++); /* Fast path */
|
||||
}
|
||||
if (tok->done != E_OK)
|
||||
return EOF;
|
||||
if (tok->fp == NULL) {
|
||||
rc = tok_underflow_string(tok);
|
||||
}
|
||||
else if (tok->prompt != NULL) {
|
||||
rc = tok_underflow_interactive(tok);
|
||||
}
|
||||
else {
|
||||
rc = tok_underflow_file(tok);
|
||||
}
|
||||
if (Py_DebugFlag) {
|
||||
printf("line[%d] = ", tok->lineno);
|
||||
print_escape(stdout, tok->cur, tok->inp - tok->cur);
|
||||
printf(" tok->done = %d\n", tok->done);
|
||||
}
|
||||
if (!rc) {
|
||||
tok->cur = tok->inp;
|
||||
return EOF;
|
||||
}
|
||||
tok->line_start = tok->cur;
|
||||
}
|
||||
Py_UNREACHABLE();
|
||||
}
|
||||
|
||||
/* Back-up one character */
|
||||
|
||||
|
@ -1076,8 +1053,8 @@ tok_backup(struct tok_state *tok, int c)
|
|||
if (--tok->cur < tok->buf) {
|
||||
Py_FatalError("tokenizer beginning of buffer");
|
||||
}
|
||||
if (*tok->cur != c) {
|
||||
*tok->cur = c;
|
||||
if ((int)(unsigned char)*tok->cur != c) {
|
||||
Py_FatalError("tok_backup: wrong character");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
@ -1951,9 +1928,10 @@ PyTokenizer_FindEncodingFilename(int fd, PyObject *filename)
|
|||
fclose(fp);
|
||||
if (tok->encoding) {
|
||||
encoding = (char *)PyMem_Malloc(strlen(tok->encoding) + 1);
|
||||
if (encoding)
|
||||
if (encoding) {
|
||||
strcpy(encoding, tok->encoding);
|
||||
}
|
||||
}
|
||||
PyTokenizer_Free(tok);
|
||||
return encoding;
|
||||
}
|
||||
|
|
|
@ -15,8 +15,8 @@ extern "C" {
|
|||
|
||||
enum decoding_state {
|
||||
STATE_INIT,
|
||||
STATE_RAW,
|
||||
STATE_NORMAL /* have a codec associated with input */
|
||||
STATE_SEEK_CODING,
|
||||
STATE_NORMAL
|
||||
};
|
||||
|
||||
/* Tokenizer state */
|
||||
|
@ -54,7 +54,6 @@ struct tok_state {
|
|||
/* Stuff for PEP 0263 */
|
||||
enum decoding_state decoding_state;
|
||||
int decoding_erred; /* whether erred in decoding */
|
||||
int read_coding_spec; /* whether 'coding:...' has been read */
|
||||
char *encoding; /* Source encoding. */
|
||||
int cont_line; /* whether we are in a continuation line. */
|
||||
const char* line_start; /* pointer to start of current line */
|
||||
|
|
Loading…
Reference in a new issue