mirror of https://github.com/python/cpython
105 lines
4.5 KiB
C
105 lines
4.5 KiB
C
#ifndef Py_TOKENIZER_H
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#define Py_TOKENIZER_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "object.h"
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/* Tokenizer interface */
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#include "pycore_token.h" /* For token types */
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#define MAXINDENT 100 /* Max indentation level */
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#define MAXLEVEL 200 /* Max parentheses level */
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enum decoding_state {
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STATE_INIT,
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STATE_SEEK_CODING,
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STATE_NORMAL
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};
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enum interactive_underflow_t {
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/* Normal mode of operation: return a new token when asked in interactie mode */
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IUNDERFLOW_NORMAL,
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/* Forcefully return ENDMARKER when asked for a new token in interactive mode. This
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* can be used to prevent the tokenizer to prompt the user for new tokens */
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IUNDERFLOW_STOP,
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};
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/* Tokenizer state */
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struct tok_state {
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/* Input state; buf <= cur <= inp <= end */
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/* NB an entire line is held in the buffer */
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char *buf; /* Input buffer, or NULL; malloc'ed if fp != NULL */
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char *cur; /* Next character in buffer */
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char *inp; /* End of data in buffer */
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int fp_interactive; /* If the file descriptor is interactive */
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char *interactive_src_start; /* The start of the source parsed so far in interactive mode */
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char *interactive_src_end; /* The end of the source parsed so far in interactive mode */
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const char *end; /* End of input buffer if buf != NULL */
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const char *start; /* Start of current token if not NULL */
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int done; /* E_OK normally, E_EOF at EOF, otherwise error code */
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/* NB If done != E_OK, cur must be == inp!!! */
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FILE *fp; /* Rest of input; NULL if tokenizing a string */
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int tabsize; /* Tab spacing */
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int indent; /* Current indentation index */
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int indstack[MAXINDENT]; /* Stack of indents */
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int atbol; /* Nonzero if at begin of new line */
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int pendin; /* Pending indents (if > 0) or dedents (if < 0) */
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const char *prompt, *nextprompt; /* For interactive prompting */
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int lineno; /* Current line number */
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int first_lineno; /* First line of a single line or multi line string
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expression (cf. issue 16806) */
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int level; /* () [] {} Parentheses nesting level */
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/* Used to allow free continuations inside them */
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char parenstack[MAXLEVEL];
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int parenlinenostack[MAXLEVEL];
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int parencolstack[MAXLEVEL];
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PyObject *filename;
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/* Stuff for checking on different tab sizes */
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int altindstack[MAXINDENT]; /* Stack of alternate indents */
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/* Stuff for PEP 0263 */
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enum decoding_state decoding_state;
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int decoding_erred; /* whether erred in decoding */
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char *encoding; /* Source encoding. */
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int cont_line; /* whether we are in a continuation line. */
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const char* line_start; /* pointer to start of current line */
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const char* multi_line_start; /* pointer to start of first line of
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a single line or multi line string
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expression (cf. issue 16806) */
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PyObject *decoding_readline; /* open(...).readline */
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PyObject *decoding_buffer;
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const char* enc; /* Encoding for the current str. */
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char* str; /* Source string being tokenized (if tokenizing from a string)*/
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char* input; /* Tokenizer's newline translated copy of the string. */
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int type_comments; /* Whether to look for type comments */
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/* async/await related fields (still needed depending on feature_version) */
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int async_hacks; /* =1 if async/await aren't always keywords */
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int async_def; /* =1 if tokens are inside an 'async def' body. */
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int async_def_indent; /* Indentation level of the outermost 'async def'. */
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int async_def_nl; /* =1 if the outermost 'async def' had at least one
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NEWLINE token after it. */
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/* How to proceed when asked for a new token in interactive mode */
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enum interactive_underflow_t interactive_underflow;
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#ifdef Py_DEBUG
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int debug;
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#endif
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};
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extern struct tok_state *_PyTokenizer_FromString(const char *, int);
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extern struct tok_state *_PyTokenizer_FromUTF8(const char *, int);
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extern struct tok_state *_PyTokenizer_FromFile(FILE *, const char*,
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const char *, const char *);
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extern void _PyTokenizer_Free(struct tok_state *);
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extern int _PyTokenizer_Get(struct tok_state *, const char **, const char **);
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#define tok_dump _Py_tok_dump
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_TOKENIZER_H */
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