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#include "Python.h"
#include "errcode.h"
#include "helpers.h"
#include "../lexer/lexer.h"
#include "../lexer/state.h"
#include "../lexer/buffer.h"
static int
tok_readline_string(struct tok_state* tok) {
PyObject* line = NULL;
PyObject* raw_line = PyObject_CallNoArgs(tok->readline);
if (raw_line == NULL) {
if (PyErr_ExceptionMatches(PyExc_StopIteration)) {
PyErr_Clear();
return 1;
}
_PyTokenizer_error_ret(tok);
goto error;
}
if(tok->encoding != NULL) {
if (!PyBytes_Check(raw_line)) {
PyErr_Format(PyExc_TypeError, "readline() returned a non-bytes object");
_PyTokenizer_error_ret(tok);
goto error;
}
line = PyUnicode_Decode(PyBytes_AS_STRING(raw_line), PyBytes_GET_SIZE(raw_line),
tok->encoding, "replace");
Py_CLEAR(raw_line);
if (line == NULL) {
_PyTokenizer_error_ret(tok);
goto error;
}
} else {
if(!PyUnicode_Check(raw_line)) {
PyErr_Format(PyExc_TypeError, "readline() returned a non-string object");
_PyTokenizer_error_ret(tok);
goto error;
}
line = raw_line;
raw_line = NULL;
}
Py_ssize_t buflen;
const char* buf = PyUnicode_AsUTF8AndSize(line, &buflen);
if (buf == NULL) {
_PyTokenizer_error_ret(tok);
goto error;
}
// Make room for the null terminator *and* potentially
// an extra newline character that we may need to artificially
// add.
size_t buffer_size = buflen + 2;
if (!_PyLexer_tok_reserve_buf(tok, buffer_size)) {
goto error;
}
memcpy(tok->inp, buf, buflen);
tok->inp += buflen;
*tok->inp = '\0';
tok->line_start = tok->cur;
Py_DECREF(line);
return 1;
error:
Py_XDECREF(raw_line);
Py_XDECREF(line);
return 0;
}
static int
tok_underflow_readline(struct tok_state* tok) {
assert(tok->decoding_state == STATE_NORMAL);
assert(tok->fp == NULL && tok->input == NULL && tok->decoding_readline == NULL);
if (tok->start == NULL && !INSIDE_FSTRING(tok)) {
tok->cur = tok->inp = tok->buf;
}
if (!tok_readline_string(tok)) {
return 0;
}
if (tok->inp == tok->cur) {
tok->done = E_EOF;
return 0;
}
tok->implicit_newline = 0;
if (tok->inp[-1] != '\n') {
assert(tok->inp + 1 < tok->end);
/* Last line does not end in \n, fake one */
*tok->inp++ = '\n';
*tok->inp = '\0';
tok->implicit_newline = 1;
}
if (tok->tok_mode_stack_index && !_PyLexer_update_ftstring_expr(tok, 0)) {
return 0;
}
ADVANCE_LINENO();
/* The default encoding is UTF-8, so make sure we don't have any
non-UTF-8 sequences in it. */
if (!tok->encoding && !_PyTokenizer_ensure_utf8(tok->cur, tok)) {
_PyTokenizer_error_ret(tok);
return 0;
}
assert(tok->done == E_OK);
return tok->done == E_OK;
}
struct tok_state *
_PyTokenizer_FromReadline(PyObject* readline, const char* enc,
int exec_input, int preserve_crlf)
{
struct tok_state *tok = _PyTokenizer_tok_new();
if (tok == NULL)
return NULL;
if ((tok->buf = (char *)PyMem_Malloc(BUFSIZ)) == NULL) {
_PyTokenizer_Free(tok);
return NULL;
}
tok->cur = tok->inp = tok->buf;
tok->end = tok->buf + BUFSIZ;
tok->fp = NULL;
if (enc != NULL) {
tok->encoding = _PyTokenizer_new_string(enc, strlen(enc), tok);
if (!tok->encoding) {
_PyTokenizer_Free(tok);
return NULL;
}
}
tok->decoding_state = STATE_NORMAL;
tok->underflow = &tok_underflow_readline;
Py_INCREF(readline);
tok->readline = readline;
return tok;
}
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