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Issue 3353: make built-in tokenizer available via Python C API
Patch Set: Created 4 years, 12 months ago
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1 #ifndef Py_TOKENIZER_H
2 #define Py_TOKENIZER_H
3 #ifdef __cplusplus
4 extern "C" {
5 #endif
6
7 #include "object.h"
8
9 /* Tokenizer interface */
10
11 #include "token.h" /* For token types */
12
13 typedef struct PyTokenizer_State PyTokenizer_State;
14
15 #ifndef Py_LIMITED_API
16 #define PYTOKENIZER_MAXINDENT 100 /* Max indentation level */
17
18 enum PyTokenizer_DecodingState {
19 PYTOKENIZER_STATE_INIT,
20 PYTOKENIZER_STATE_RAW,
21 PYTOKENIZER_STATE_NORMAL /* have a codec associated with input */
22 };
23
24 struct PyTokenizer_State {
25 /* Input state; buf <= cur <= inp <= end */
26 /* NB an entire line is held in the buffer */
27 char *buf; /* Input buffer, or NULL; malloc'ed if fp != NULL */
28 char *cur; /* Next character in buffer */
29 char *inp; /* End of data in buffer */
30 char *end; /* End of input buffer if buf != NULL */
31 char *start; /* Start of current token if not NULL */
32 int done; /* E_OK normally, E_EOF at EOF, otherwise error code */
33 /* NB If done != E_OK, cur must be == inp!!! */
34 FILE *fp; /* Rest of input; NULL if tokenizing a string */
35 int tabsize; /* Tab spacing */
36 int indent; /* Current indentation index */
37 int indstack[PYTOKENIZER_MAXINDENT]; /* Stack of indents */
38 int atbol; /* Nonzero if at begin of new line */
39 int pendin; /* Pending indents (if > 0) or dedents (if < 0) */
40 const char *prompt, *nextprompt; /* For interactive prompting */
41 int lineno; /* Current line number */
42 int level; /* () [] {} Parentheses nesting level */
43 /* Used to allow free continuations inside them */
44 /* Stuff for checking on different tab sizes */
45 #ifndef PGEN
46 /* pgen doesn't have access to Python codecs, it cannot decode the input
47 filename. The bytes filename might be kept, but it is only used by
48 indenterror() and it is not really needed: pgen only compiles one file
49 (Grammar/Grammar). */
50 PyObject *filename;
51 #endif
52 int altwarning; /* Issue warning if alternate tabs don't match */
53 int alterror; /* Issue error if alternate tabs don't match */
54 int alttabsize; /* Alternate tab spacing */
55 int altindstack[PYTOKENIZER_MAXINDENT]; /* Stack of alternate indent s */
56 /* Stuff for PEP 0263 */
57 enum PyTokenizer_DecodingState decoding_state;
58 int decoding_erred; /* whether erred in decoding */
59 int read_coding_spec; /* whether 'coding:...' has been read */
60 char *encoding; /* Source encoding. */
61 int cont_line; /* whether we are in a continuation line. */
62 const char* line_start; /* pointer to start of current line */
63 #ifndef PGEN
64 PyObject *decoding_readline; /* open(...).readline */
65 PyObject *decoding_buffer;
66 #endif
67 const char* enc; /* Encoding for the current str. */
68 const char* str;
69 const char* input; /* Tokenizer's newline translated copy of the string. */
70 };
71 #endif
72
73 PyAPI_FUNC(PyTokenizer_State *)PyTokenizer_FromString(const char *, int);
74 PyAPI_FUNC(PyTokenizer_State *)PyTokenizer_FromUTF8(const char *, int);
75 PyAPI_FUNC(PyTokenizer_State *)PyTokenizer_FromFile(FILE *, const char*,
76 const char *, const char *);
77 PyAPI_FUNC(void) PyTokenizer_Free(PyTokenizer_State *);
78 PyAPI_FUNC(int) PyTokenizer_Get(PyTokenizer_State *, char **, char **);
79
80 #ifdef __cplusplus
81 }
82 #endif
83 #endif /* !Py_TOKENIZER_H */
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