| |
| /* Tokenizer implementation */ |
| |
| #include "Python.h" |
| #include "pgenheaders.h" |
| |
| #include <ctype.h> |
| #include <assert.h> |
| |
| #include "tokenizer.h" |
| #include "errcode.h" |
| |
| #ifndef PGEN |
| #include "unicodeobject.h" |
| #include "stringobject.h" |
| #include "fileobject.h" |
| #include "codecs.h" |
| #include "abstract.h" |
| #include "pydebug.h" |
| #endif /* PGEN */ |
| |
| extern char *PyOS_Readline(FILE *, FILE *, char *); |
| /* Return malloc'ed string including trailing \n; |
| empty malloc'ed string for EOF; |
| NULL if interrupted */ |
| |
| /* Don't ever change this -- it would break the portability of Python code */ |
| #define TABSIZE 8 |
| |
| /* Forward */ |
| static struct tok_state *tok_new(void); |
| static int tok_nextc(struct tok_state *tok); |
| static void tok_backup(struct tok_state *tok, int c); |
| |
| /* Token names */ |
| |
| char *_PyParser_TokenNames[] = { |
| "ENDMARKER", |
| "NAME", |
| "NUMBER", |
| "STRING", |
| "NEWLINE", |
| "INDENT", |
| "DEDENT", |
| "LPAR", |
| "RPAR", |
| "LSQB", |
| "RSQB", |
| "COLON", |
| "COMMA", |
| "SEMI", |
| "PLUS", |
| "MINUS", |
| "STAR", |
| "SLASH", |
| "VBAR", |
| "AMPER", |
| "LESS", |
| "GREATER", |
| "EQUAL", |
| "DOT", |
| "PERCENT", |
| "BACKQUOTE", |
| "LBRACE", |
| "RBRACE", |
| "EQEQUAL", |
| "NOTEQUAL", |
| "LESSEQUAL", |
| "GREATEREQUAL", |
| "TILDE", |
| "CIRCUMFLEX", |
| "LEFTSHIFT", |
| "RIGHTSHIFT", |
| "DOUBLESTAR", |
| "PLUSEQUAL", |
| "MINEQUAL", |
| "STAREQUAL", |
| "SLASHEQUAL", |
| "PERCENTEQUAL", |
| "AMPEREQUAL", |
| "VBAREQUAL", |
| "CIRCUMFLEXEQUAL", |
| "LEFTSHIFTEQUAL", |
| "RIGHTSHIFTEQUAL", |
| "DOUBLESTAREQUAL", |
| "DOUBLESLASH", |
| "DOUBLESLASHEQUAL", |
| "AT", |
| /* This table must match the #defines in token.h! */ |
| "OP", |
| "<ERRORTOKEN>", |
| "<N_TOKENS>" |
| }; |
| |
| /* Create and initialize a new tok_state structure */ |
| |
| static struct tok_state * |
| tok_new(void) |
| { |
| struct tok_state *tok = (struct tok_state *)PyMem_MALLOC( |
| sizeof(struct tok_state)); |
| if (tok == NULL) |
| return NULL; |
| tok->buf = tok->cur = tok->end = tok->inp = tok->start = NULL; |
| tok->done = E_OK; |
| tok->fp = NULL; |
| tok->input = NULL; |
| tok->tabsize = TABSIZE; |
| tok->indent = 0; |
| tok->indstack[0] = 0; |
| tok->atbol = 1; |
| tok->pendin = 0; |
| tok->prompt = tok->nextprompt = NULL; |
| tok->lineno = 0; |
| tok->level = 0; |
| tok->filename = NULL; |
| tok->altwarning = 0; |
| tok->alterror = 0; |
| tok->alttabsize = 1; |
| tok->altindstack[0] = 0; |
| tok->decoding_state = 0; |
| tok->decoding_erred = 0; |
| tok->read_coding_spec = 0; |
| tok->encoding = NULL; |
| tok->cont_line = 0; |
| #ifndef PGEN |
| tok->decoding_readline = NULL; |
| tok->decoding_buffer = NULL; |
| #endif |
| return tok; |
| } |
| |
| static char * |
| new_string(const char *s, Py_ssize_t len) |
| { |
| char* result = (char *)PyMem_MALLOC(len + 1); |
| if (result != NULL) { |
| memcpy(result, s, len); |
| result[len] = '\0'; |
| } |
| return result; |
| } |
| |
| #ifdef PGEN |
| |
| static char * |
| decoding_fgets(char *s, int size, struct tok_state *tok) |
| { |
| return fgets(s, size, tok->fp); |
| } |
| |
| static int |
| decoding_feof(struct tok_state *tok) |
| { |
| return feof(tok->fp); |
| } |
| |
| static char * |
| decode_str(const char *str, int exec_input, struct tok_state *tok) |
| { |
| return new_string(str, strlen(str)); |
| } |
| |
| #else /* PGEN */ |
| |
| static char * |
| error_ret(struct tok_state *tok) /* XXX */ |
| { |
| tok->decoding_erred = 1; |
| if (tok->fp != NULL && tok->buf != NULL) /* see PyTokenizer_Free */ |
| PyMem_FREE(tok->buf); |
| tok->buf = NULL; |
| return NULL; /* as if it were EOF */ |
| } |
| |
| |
| static char * |
| get_normal_name(char *s) /* for utf-8 and latin-1 */ |
| { |
| char buf[13]; |
| int i; |
| for (i = 0; i < 12; i++) { |
| int c = s[i]; |
| if (c == '\0') |
| break; |
| else if (c == '_') |
| buf[i] = '-'; |
| else |
| buf[i] = tolower(c); |
| } |
| buf[i] = '\0'; |
| if (strcmp(buf, "utf-8") == 0 || |
| strncmp(buf, "utf-8-", 6) == 0) |
| return "utf-8"; |
| else if (strcmp(buf, "latin-1") == 0 || |
| strcmp(buf, "iso-8859-1") == 0 || |
| strcmp(buf, "iso-latin-1") == 0 || |
| strncmp(buf, "latin-1-", 8) == 0 || |
| strncmp(buf, "iso-8859-1-", 11) == 0 || |
| strncmp(buf, "iso-latin-1-", 12) == 0) |
| return "iso-8859-1"; |
| else |
| return s; |
| } |
| |
| /* Return the coding spec in S, or NULL if none is found. */ |
| |
| static char * |
| get_coding_spec(const char *s, Py_ssize_t size) |
| { |
| Py_ssize_t i; |
| /* Coding spec must be in a comment, and that comment must be |
| * the only statement on the source code line. */ |
| for (i = 0; i < size - 6; i++) { |
| if (s[i] == '#') |
| break; |
| if (s[i] != ' ' && s[i] != '\t' && s[i] != '\014') |
| return NULL; |
| } |
| for (; i < size - 6; i++) { /* XXX inefficient search */ |
| const char* t = s + i; |
| if (strncmp(t, "coding", 6) == 0) { |
| const char* begin = NULL; |
| t += 6; |
| if (t[0] != ':' && t[0] != '=') |
| continue; |
| do { |
| t++; |
| } while (t[0] == '\x20' || t[0] == '\t'); |
| |
| begin = t; |
| while (Py_ISALNUM(t[0]) || |
| t[0] == '-' || t[0] == '_' || t[0] == '.') |
| t++; |
| |
| if (begin < t) { |
| char* r = new_string(begin, t - begin); |
| char* q = get_normal_name(r); |
| if (r != q) { |
| PyMem_FREE(r); |
| r = new_string(q, strlen(q)); |
| } |
| return r; |
| } |
| } |
| } |
| return NULL; |
| } |
| |
| /* Check whether the line contains a coding spec. If it does, |
| invoke the set_readline function for the new encoding. |
| This function receives the tok_state and the new encoding. |
| Return 1 on success, 0 on failure. */ |
| |
| static int |
| check_coding_spec(const char* line, Py_ssize_t size, struct tok_state *tok, |
| int set_readline(struct tok_state *, const char *)) |
| { |
| char * cs; |
| int r = 1; |
| |
| if (tok->cont_line) |
| /* It's a continuation line, so it can't be a coding spec. */ |
| return 1; |
| cs = get_coding_spec(line, size); |
| if (cs != NULL) { |
| tok->read_coding_spec = 1; |
| if (tok->encoding == NULL) { |
| assert(tok->decoding_state == 1); /* raw */ |
| if (strcmp(cs, "utf-8") == 0 || |
| strcmp(cs, "iso-8859-1") == 0) { |
| tok->encoding = cs; |
| } else { |
| #ifdef Py_USING_UNICODE |
| r = set_readline(tok, cs); |
| if (r) { |
| tok->encoding = cs; |
| tok->decoding_state = -1; |
| } |
| else |
| PyMem_FREE(cs); |
| #else |
| /* Without Unicode support, we cannot |
| process the coding spec. Since there |
| won't be any Unicode literals, that |
| won't matter. */ |
| PyMem_FREE(cs); |
| #endif |
| } |
| } else { /* then, compare cs with BOM */ |
| r = (strcmp(tok->encoding, cs) == 0); |
| PyMem_FREE(cs); |
| } |
| } |
| if (!r) { |
| cs = tok->encoding; |
| if (!cs) |
| cs = "with BOM"; |
| PyErr_Format(PyExc_SyntaxError, "encoding problem: %s", cs); |
| } |
| return r; |
| } |
| |
| /* See whether the file starts with a BOM. If it does, |
| invoke the set_readline function with the new encoding. |
| Return 1 on success, 0 on failure. */ |
| |
| static int |
| check_bom(int get_char(struct tok_state *), |
| void unget_char(int, struct tok_state *), |
| int set_readline(struct tok_state *, const char *), |
| struct tok_state *tok) |
| { |
| int ch1, ch2, ch3; |
| ch1 = get_char(tok); |
| tok->decoding_state = 1; |
| if (ch1 == EOF) { |
| return 1; |
| } else if (ch1 == 0xEF) { |
| ch2 = get_char(tok); |
| if (ch2 != 0xBB) { |
| unget_char(ch2, tok); |
| unget_char(ch1, tok); |
| return 1; |
| } |
| ch3 = get_char(tok); |
| if (ch3 != 0xBF) { |
| unget_char(ch3, tok); |
| unget_char(ch2, tok); |
| unget_char(ch1, tok); |
| return 1; |
| } |
| #if 0 |
| /* Disable support for UTF-16 BOMs until a decision |
| is made whether this needs to be supported. */ |
| } else if (ch1 == 0xFE) { |
| ch2 = get_char(tok); |
| if (ch2 != 0xFF) { |
| unget_char(ch2, tok); |
| unget_char(ch1, tok); |
| return 1; |
| } |
| if (!set_readline(tok, "utf-16-be")) |
| return 0; |
| tok->decoding_state = -1; |
| } else if (ch1 == 0xFF) { |
| ch2 = get_char(tok); |
| if (ch2 != 0xFE) { |
| unget_char(ch2, tok); |
| unget_char(ch1, tok); |
| return 1; |
| } |
| if (!set_readline(tok, "utf-16-le")) |
| return 0; |
| tok->decoding_state = -1; |
| #endif |
| } else { |
| unget_char(ch1, tok); |
| return 1; |
| } |
| if (tok->encoding != NULL) |
| PyMem_FREE(tok->encoding); |
| tok->encoding = new_string("utf-8", 5); /* resulting is in utf-8 */ |
| return 1; |
| } |
| |
| /* Read a line of text from TOK into S, using the stream in TOK. |
| Return NULL on failure, else S. |
| |
| On entry, tok->decoding_buffer will be one of: |
| 1) NULL: need to call tok->decoding_readline to get a new line |
| 2) PyUnicodeObject *: decoding_feof has called tok->decoding_readline and |
| stored the result in tok->decoding_buffer |
| 3) PyStringObject *: previous call to fp_readl did not have enough room |
| (in the s buffer) to copy entire contents of the line read |
| by tok->decoding_readline. tok->decoding_buffer has the overflow. |
| In this case, fp_readl is called in a loop (with an expanded buffer) |
| until the buffer ends with a '\n' (or until the end of the file is |
| reached): see tok_nextc and its calls to decoding_fgets. |
| */ |
| |
| static char * |
| fp_readl(char *s, int size, struct tok_state *tok) |
| { |
| #ifndef Py_USING_UNICODE |
| /* In a non-Unicode built, this should never be called. */ |
| Py_FatalError("fp_readl should not be called in this build."); |
| return NULL; /* Keep compiler happy (not reachable) */ |
| #else |
| PyObject* utf8 = NULL; |
| PyObject* buf = tok->decoding_buffer; |
| char *str; |
| Py_ssize_t utf8len; |
| |
| /* Ask for one less byte so we can terminate it */ |
| assert(size > 0); |
| size--; |
| |
| if (buf == NULL) { |
| buf = PyObject_CallObject(tok->decoding_readline, NULL); |
| if (buf == NULL) |
| return error_ret(tok); |
| } else { |
| tok->decoding_buffer = NULL; |
| if (PyString_CheckExact(buf)) |
| utf8 = buf; |
| } |
| if (utf8 == NULL) { |
| utf8 = PyUnicode_AsUTF8String(buf); |
| Py_DECREF(buf); |
| if (utf8 == NULL) |
| return error_ret(tok); |
| } |
| str = PyString_AsString(utf8); |
| utf8len = PyString_GET_SIZE(utf8); |
| if (utf8len > size) { |
| tok->decoding_buffer = PyString_FromStringAndSize(str+size, utf8len-size); |
| if (tok->decoding_buffer == NULL) { |
| Py_DECREF(utf8); |
| return error_ret(tok); |
| } |
| utf8len = size; |
| } |
| memcpy(s, str, utf8len); |
| s[utf8len] = '\0'; |
| Py_DECREF(utf8); |
| if (utf8len == 0) |
| return NULL; /* EOF */ |
| return s; |
| #endif |
| } |
| |
| /* Set the readline function for TOK to a StreamReader's |
| readline function. The StreamReader is named ENC. |
| |
| This function is called from check_bom and check_coding_spec. |
| |
| ENC is usually identical to the future value of tok->encoding, |
| except for the (currently unsupported) case of UTF-16. |
| |
| Return 1 on success, 0 on failure. */ |
| |
| static int |
| fp_setreadl(struct tok_state *tok, const char* enc) |
| { |
| PyObject *reader, *stream, *readline; |
| |
| /* XXX: constify filename argument. */ |
| stream = PyFile_FromFile(tok->fp, (char*)tok->filename, "rb", NULL); |
| if (stream == NULL) |
| return 0; |
| |
| reader = PyCodec_StreamReader(enc, stream, NULL); |
| Py_DECREF(stream); |
| if (reader == NULL) |
| return 0; |
| |
| readline = PyObject_GetAttrString(reader, "readline"); |
| Py_DECREF(reader); |
| if (readline == NULL) |
| return 0; |
| |
| tok->decoding_readline = readline; |
| return 1; |
| } |
| |
| /* Fetch the next byte from TOK. */ |
| |
| static int fp_getc(struct tok_state *tok) { |
| return getc(tok->fp); |
| } |
| |
| /* Unfetch the last byte back into TOK. */ |
| |
| static void fp_ungetc(int c, struct tok_state *tok) { |
| ungetc(c, tok->fp); |
| } |
| |
| /* Read a line of input from TOK. Determine encoding |
| if necessary. */ |
| |
| static char * |
| decoding_fgets(char *s, int size, struct tok_state *tok) |
| { |
| char *line = NULL; |
| int badchar = 0; |
| for (;;) { |
| if (tok->decoding_state < 0) { |
| /* We already have a codec associated with |
| this input. */ |
| line = fp_readl(s, size, tok); |
| break; |
| } else if (tok->decoding_state > 0) { |
| /* We want a 'raw' read. */ |
| line = Py_UniversalNewlineFgets(s, size, |
| tok->fp, NULL); |
| break; |
| } else { |
| /* 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)) |
| return error_ret(tok); |
| assert(tok->decoding_state != 0); |
| } |
| } |
| if (line != NULL && tok->lineno < 2 && !tok->read_coding_spec) { |
| if (!check_coding_spec(line, strlen(line), tok, fp_setreadl)) { |
| return error_ret(tok); |
| } |
| } |
| #ifndef PGEN |
| /* The default encoding is ASCII, so make sure we don't have any |
| non-ASCII bytes in it. */ |
| if (line && !tok->encoding) { |
| unsigned char *c; |
| for (c = (unsigned char *)line; *c; c++) |
| if (*c > 127) { |
| badchar = *c; |
| break; |
| } |
| } |
| if (badchar) { |
| char buf[500]; |
| /* Need to add 1 to the line number, since this line |
| has not been counted, yet. */ |
| sprintf(buf, |
| "Non-ASCII character '\\x%.2x' " |
| "in file %.200s on line %i, " |
| "but no encoding declared; " |
| "see http://www.python.org/peps/pep-0263.html for details", |
| badchar, tok->filename, tok->lineno + 1); |
| PyErr_SetString(PyExc_SyntaxError, buf); |
| return error_ret(tok); |
| } |
| #endif |
| return line; |
| } |
| |
| static int |
| decoding_feof(struct tok_state *tok) |
| { |
| if (tok->decoding_state >= 0) { |
| return feof(tok->fp); |
| } else { |
| PyObject* buf = tok->decoding_buffer; |
| if (buf == NULL) { |
| buf = PyObject_CallObject(tok->decoding_readline, NULL); |
| if (buf == NULL) { |
| error_ret(tok); |
| return 1; |
| } else { |
| tok->decoding_buffer = buf; |
| } |
| } |
| return PyObject_Length(buf) == 0; |
| } |
| } |
| |
| /* Fetch a byte from TOK, using the string buffer. */ |
| |
| static int |
| buf_getc(struct tok_state *tok) { |
| return Py_CHARMASK(*tok->str++); |
| } |
| |
| /* Unfetch a byte from TOK, using the string buffer. */ |
| |
| static void |
| buf_ungetc(int c, struct tok_state *tok) { |
| tok->str--; |
| assert(Py_CHARMASK(*tok->str) == c); /* tok->cur may point to read-only segment */ |
| } |
| |
| /* Set the readline function for TOK to ENC. For the string-based |
| tokenizer, this means to just record the encoding. */ |
| |
| static int |
| buf_setreadl(struct tok_state *tok, const char* enc) { |
| tok->enc = enc; |
| return 1; |
| } |
| |
| /* Return a UTF-8 encoding Python string object from the |
| C byte string STR, which is encoded with ENC. */ |
| |
| #ifdef Py_USING_UNICODE |
| static PyObject * |
| translate_into_utf8(const char* str, const char* enc) { |
| PyObject *utf8; |
| PyObject* buf = PyUnicode_Decode(str, strlen(str), enc, NULL); |
| if (buf == NULL) |
| return NULL; |
| utf8 = PyUnicode_AsUTF8String(buf); |
| Py_DECREF(buf); |
| return utf8; |
| } |
| #endif |
| |
| |
| static char * |
| translate_newlines(const char *s, int exec_input, struct tok_state *tok) { |
| int skip_next_lf = 0, needed_length = strlen(s) + 2, final_length; |
| char *buf, *current; |
| char c = '\0'; |
| buf = PyMem_MALLOC(needed_length); |
| if (buf == NULL) { |
| tok->done = E_NOMEM; |
| return NULL; |
| } |
| for (current = buf; *s; s++, current++) { |
| c = *s; |
| if (skip_next_lf) { |
| skip_next_lf = 0; |
| if (c == '\n') { |
| c = *++s; |
| if (!c) |
| break; |
| } |
| } |
| if (c == '\r') { |
| skip_next_lf = 1; |
| c = '\n'; |
| } |
| *current = c; |
| } |
| /* If this is exec input, add a newline to the end of the string if |
| there isn't one already. */ |
| if (exec_input && c != '\n') { |
| *current = '\n'; |
| current++; |
| } |
| *current = '\0'; |
| final_length = current - buf + 1; |
| if (final_length < needed_length && final_length) |
| /* should never fail */ |
| buf = PyMem_REALLOC(buf, final_length); |
| return buf; |
| } |
| |
| /* Decode a byte string STR for use as the buffer of TOK. |
| Look for encoding declarations inside STR, and record them |
| inside TOK. */ |
| |
| static const char * |
| decode_str(const char *input, int single, struct tok_state *tok) |
| { |
| PyObject* utf8 = NULL; |
| const char *str; |
| const char *s; |
| const char *newl[2] = {NULL, NULL}; |
| int lineno = 0; |
| tok->input = str = translate_newlines(input, single, tok); |
| if (str == NULL) |
| return NULL; |
| tok->enc = NULL; |
| tok->str = str; |
| if (!check_bom(buf_getc, buf_ungetc, buf_setreadl, tok)) |
| return error_ret(tok); |
| str = tok->str; /* string after BOM if any */ |
| assert(str); |
| #ifdef Py_USING_UNICODE |
| if (tok->enc != NULL) { |
| utf8 = translate_into_utf8(str, tok->enc); |
| if (utf8 == NULL) |
| return error_ret(tok); |
| str = PyString_AsString(utf8); |
| } |
| #endif |
| for (s = str;; s++) { |
| if (*s == '\0') break; |
| else if (*s == '\n') { |
| assert(lineno < 2); |
| newl[lineno] = s; |
| lineno++; |
| if (lineno == 2) break; |
| } |
| } |
| tok->enc = NULL; |
| /* need to check line 1 and 2 separately since check_coding_spec |
| assumes a single line as input */ |
| if (newl[0]) { |
| if (!check_coding_spec(str, newl[0] - str, tok, buf_setreadl)) |
| return error_ret(tok); |
| if (tok->enc == NULL && newl[1]) { |
| if (!check_coding_spec(newl[0]+1, newl[1] - newl[0], |
| tok, buf_setreadl)) |
| return error_ret(tok); |
| } |
| } |
| #ifdef Py_USING_UNICODE |
| if (tok->enc != NULL) { |
| assert(utf8 == NULL); |
| utf8 = translate_into_utf8(str, tok->enc); |
| if (utf8 == NULL) |
| return error_ret(tok); |
| str = PyString_AsString(utf8); |
| } |
| #endif |
| assert(tok->decoding_buffer == NULL); |
| tok->decoding_buffer = utf8; /* CAUTION */ |
| return str; |
| } |
| |
| #endif /* PGEN */ |
| |
| /* Set up tokenizer for string */ |
| |
| struct tok_state * |
| PyTokenizer_FromString(const char *str, int exec_input) |
| { |
| struct tok_state *tok = tok_new(); |
| if (tok == NULL) |
| return NULL; |
| str = (char *)decode_str(str, exec_input, tok); |
| if (str == NULL) { |
| PyTokenizer_Free(tok); |
| return NULL; |
| } |
| |
| /* XXX: constify members. */ |
| tok->buf = tok->cur = tok->end = tok->inp = (char*)str; |
| return tok; |
| } |
| |
| |
| /* Set up tokenizer for file */ |
| |
| struct tok_state * |
| PyTokenizer_FromFile(FILE *fp, char *ps1, char *ps2) |
| { |
| struct tok_state *tok = 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 = fp; |
| tok->prompt = ps1; |
| tok->nextprompt = ps2; |
| return tok; |
| } |
| |
| |
| /* Free a tok_state structure */ |
| |
| void |
| PyTokenizer_Free(struct tok_state *tok) |
| { |
| if (tok->encoding != NULL) |
| PyMem_FREE(tok->encoding); |
| #ifndef PGEN |
| Py_XDECREF(tok->decoding_readline); |
| Py_XDECREF(tok->decoding_buffer); |
| #endif |
| if (tok->fp != NULL && tok->buf != NULL) |
| PyMem_FREE(tok->buf); |
| if (tok->input) |
| PyMem_FREE((char *)tok->input); |
| PyMem_FREE(tok); |
| } |
| |
| #if !defined(PGEN) && defined(Py_USING_UNICODE) |
| static int |
| tok_stdin_decode(struct tok_state *tok, char **inp) |
| { |
| PyObject *enc, *sysstdin, *decoded, *utf8; |
| const char *encoding; |
| char *converted; |
| |
| if (PySys_GetFile((char *)"stdin", NULL) != stdin) |
| return 0; |
| sysstdin = PySys_GetObject("stdin"); |
| if (sysstdin == NULL || !PyFile_Check(sysstdin)) |
| return 0; |
| |
| enc = ((PyFileObject *)sysstdin)->f_encoding; |
| if (enc == NULL || !PyString_Check(enc)) |
| return 0; |
| Py_INCREF(enc); |
| |
| encoding = PyString_AsString(enc); |
| decoded = PyUnicode_Decode(*inp, strlen(*inp), encoding, NULL); |
| if (decoded == NULL) |
| goto error_clear; |
| |
| utf8 = PyUnicode_AsEncodedString(decoded, "utf-8", NULL); |
| Py_DECREF(decoded); |
| if (utf8 == NULL) |
| goto error_clear; |
| |
| assert(PyString_Check(utf8)); |
| converted = new_string(PyString_AS_STRING(utf8), |
| PyString_GET_SIZE(utf8)); |
| Py_DECREF(utf8); |
| if (converted == NULL) |
| goto error_nomem; |
| |
| PyMem_FREE(*inp); |
| *inp = converted; |
| if (tok->encoding != NULL) |
| PyMem_FREE(tok->encoding); |
| tok->encoding = new_string(encoding, strlen(encoding)); |
| if (tok->encoding == NULL) |
| goto error_nomem; |
| |
| Py_DECREF(enc); |
| return 0; |
| |
| error_nomem: |
| Py_DECREF(enc); |
| tok->done = E_NOMEM; |
| return -1; |
| |
| error_clear: |
| Py_DECREF(enc); |
| if (!PyErr_ExceptionMatches(PyExc_UnicodeDecodeError)) { |
| tok->done = E_ERROR; |
| return -1; |
| } |
| /* Fallback to iso-8859-1: for backward compatibility */ |
| PyErr_Clear(); |
| return 0; |
| } |
| #endif |
| |
| /* Get next char, updating state; error code goes into tok->done */ |
| |
| static int |
| tok_nextc(register 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) { |
| char *end = strchr(tok->inp, '\n'); |
| if (end != NULL) |
| end++; |
| else { |
| end = strchr(tok->inp, '\0'); |
| if (end == tok->inp) { |
| tok->done = E_EOF; |
| return EOF; |
| } |
| } |
| 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) { |
| char *newtok = PyOS_Readline(stdin, stdout, tok->prompt); |
| if (tok->nextprompt != NULL) |
| tok->prompt = tok->nextprompt; |
| if (newtok == NULL) |
| tok->done = E_INTR; |
| else if (*newtok == '\0') { |
| PyMem_FREE(newtok); |
| tok->done = E_EOF; |
| } |
| #if !defined(PGEN) && defined(Py_USING_UNICODE) |
| else if (tok_stdin_decode(tok, &newtok) != 0) |
| PyMem_FREE(newtok); |
| #endif |
| 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); |
| char *buf = tok->buf; |
| buf = (char *)PyMem_REALLOC(buf, newlen+1); |
| tok->lineno++; |
| if (buf == NULL) { |
| PyMem_FREE(tok->buf); |
| tok->buf = NULL; |
| PyMem_FREE(newtok); |
| tok->done = E_NOMEM; |
| return EOF; |
| } |
| tok->buf = buf; |
| tok->cur = tok->buf + oldlen; |
| tok->line_start = tok->cur; |
| strcpy(tok->buf + oldlen, newtok); |
| PyMem_FREE(newtok); |
| tok->inp = tok->buf + newlen; |
| tok->end = tok->inp + 1; |
| tok->start = tok->buf + start; |
| } |
| else { |
| tok->lineno++; |
| if (tok->buf != NULL) |
| PyMem_FREE(tok->buf); |
| tok->buf = newtok; |
| tok->line_start = tok->buf; |
| tok->cur = tok->buf; |
| tok->line_start = tok->buf; |
| 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) { |
| tok->done = E_EOF; |
| done = 1; |
| } |
| else { |
| tok->done = E_OK; |
| tok->inp = strchr(tok->buf, '\0'); |
| done = 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 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->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 */ |
| 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) |
| PySys_WriteStderr("\n"); |
| tok->cur = tok->inp; |
| return EOF; |
| } |
| } |
| /*NOTREACHED*/ |
| } |
| |
| |
| /* Back-up one character */ |
| |
| static void |
| tok_backup(register struct tok_state *tok, register int c) |
| { |
| if (c != EOF) { |
| if (--tok->cur < tok->buf) |
| Py_FatalError("tok_backup: beginning of buffer"); |
| if (*tok->cur != c) |
| *tok->cur = c; |
| } |
| } |
| |
| |
| /* Return the token corresponding to a single character */ |
| |
| int |
| PyToken_OneChar(int c) |
| { |
| switch (c) { |
| case '(': return LPAR; |
| case ')': return RPAR; |
| case '[': return LSQB; |
| case ']': return RSQB; |
| case ':': return COLON; |
| case ',': return COMMA; |
| case ';': return SEMI; |
| case '+': return PLUS; |
| case '-': return MINUS; |
| case '*': return STAR; |
| case '/': return SLASH; |
| case '|': return VBAR; |
| case '&': return AMPER; |
| case '<': return LESS; |
| case '>': return GREATER; |
| case '=': return EQUAL; |
| case '.': return DOT; |
| case '%': return PERCENT; |
| case '`': return BACKQUOTE; |
| case '{': return LBRACE; |
| case '}': return RBRACE; |
| case '^': return CIRCUMFLEX; |
| case '~': return TILDE; |
| case '@': return AT; |
| default: return OP; |
| } |
| } |
| |
| |
| int |
| PyToken_TwoChars(int c1, int c2) |
| { |
| switch (c1) { |
| case '=': |
| switch (c2) { |
| case '=': return EQEQUAL; |
| } |
| break; |
| case '!': |
| switch (c2) { |
| case '=': return NOTEQUAL; |
| } |
| break; |
| case '<': |
| switch (c2) { |
| case '>': return NOTEQUAL; |
| case '=': return LESSEQUAL; |
| case '<': return LEFTSHIFT; |
| } |
| break; |
| case '>': |
| switch (c2) { |
| case '=': return GREATEREQUAL; |
| case '>': return RIGHTSHIFT; |
| } |
| break; |
| case '+': |
| switch (c2) { |
| case '=': return PLUSEQUAL; |
| } |
| break; |
| case '-': |
| switch (c2) { |
| case '=': return MINEQUAL; |
| } |
| break; |
| case '*': |
| switch (c2) { |
| case '*': return DOUBLESTAR; |
| case '=': return STAREQUAL; |
| } |
| break; |
| case '/': |
| switch (c2) { |
| case '/': return DOUBLESLASH; |
| case '=': return SLASHEQUAL; |
| } |
| break; |
| case '|': |
| switch (c2) { |
| case '=': return VBAREQUAL; |
| } |
| break; |
| case '%': |
| switch (c2) { |
| case '=': return PERCENTEQUAL; |
| } |
| break; |
| case '&': |
| switch (c2) { |
| case '=': return AMPEREQUAL; |
| } |
| break; |
| case '^': |
| switch (c2) { |
| case '=': return CIRCUMFLEXEQUAL; |
| } |
| break; |
| } |
| return OP; |
| } |
| |
| int |
| PyToken_ThreeChars(int c1, int c2, int c3) |
| { |
| switch (c1) { |
| case '<': |
| switch (c2) { |
| case '<': |
| switch (c3) { |
| case '=': |
| return LEFTSHIFTEQUAL; |
| } |
| break; |
| } |
| break; |
| case '>': |
| switch (c2) { |
| case '>': |
| switch (c3) { |
| case '=': |
| return RIGHTSHIFTEQUAL; |
| } |
| break; |
| } |
| break; |
| case '*': |
| switch (c2) { |
| case '*': |
| switch (c3) { |
| case '=': |
| return DOUBLESTAREQUAL; |
| } |
| break; |
| } |
| break; |
| case '/': |
| switch (c2) { |
| case '/': |
| switch (c3) { |
| case '=': |
| return DOUBLESLASHEQUAL; |
| } |
| break; |
| } |
| break; |
| } |
| return OP; |
| } |
| |
| static int |
| indenterror(struct tok_state *tok) |
| { |
| if (tok->alterror) { |
| tok->done = E_TABSPACE; |
| tok->cur = tok->inp; |
| return 1; |
| } |
| if (tok->altwarning) { |
| PySys_WriteStderr("%s: inconsistent use of tabs and spaces " |
| "in indentation\n", tok->filename); |
| tok->altwarning = 0; |
| } |
| return 0; |
| } |
| |
| /* Get next token, after space stripping etc. */ |
| |
| static int |
| tok_get(register struct tok_state *tok, char **p_start, char **p_end) |
| { |
| register int c; |
| int blankline; |
| |
| *p_start = *p_end = NULL; |
| nextline: |
| tok->start = NULL; |
| blankline = 0; |
| |
| /* Get indentation level */ |
| if (tok->atbol) { |
| register int col = 0; |
| register int altcol = 0; |
| tok->atbol = 0; |
| for (;;) { |
| c = tok_nextc(tok); |
| if (c == ' ') |
| col++, altcol++; |
| else if (c == '\t') { |
| col = (col/tok->tabsize + 1) * tok->tabsize; |
| altcol = (altcol/tok->alttabsize + 1) |
| * tok->alttabsize; |
| } |
| else if (c == '\014') /* Control-L (formfeed) */ |
| col = altcol = 0; /* For Emacs users */ |
| else |
| break; |
| } |
| tok_backup(tok, c); |
| if (c == '#' || c == '\n') { |
| /* Lines with only whitespace and/or comments |
| shouldn't affect the indentation and are |
| not passed to the parser as NEWLINE tokens, |
| except *totally* empty lines in interactive |
| mode, which signal the end of a command group. */ |
| if (col == 0 && c == '\n' && tok->prompt != NULL) |
| blankline = 0; /* Let it through */ |
| else |
| blankline = 1; /* Ignore completely */ |
| /* We can't jump back right here since we still |
| may need to skip to the end of a comment */ |
| } |
| if (!blankline && tok->level == 0) { |
| if (col == tok->indstack[tok->indent]) { |
| /* No change */ |
| if (altcol != tok->altindstack[tok->indent]) { |
| if (indenterror(tok)) |
| return ERRORTOKEN; |
| } |
| } |
| else if (col > tok->indstack[tok->indent]) { |
| /* Indent -- always one */ |
| if (tok->indent+1 >= MAXINDENT) { |
| tok->done = E_TOODEEP; |
| tok->cur = tok->inp; |
| return ERRORTOKEN; |
| } |
| if (altcol <= tok->altindstack[tok->indent]) { |
| if (indenterror(tok)) |
| return ERRORTOKEN; |
| } |
| tok->pendin++; |
| tok->indstack[++tok->indent] = col; |
| tok->altindstack[tok->indent] = altcol; |
| } |
| else /* col < tok->indstack[tok->indent] */ { |
| /* Dedent -- any number, must be consistent */ |
| while (tok->indent > 0 && |
| col < tok->indstack[tok->indent]) { |
| tok->pendin--; |
| tok->indent--; |
| } |
| if (col != tok->indstack[tok->indent]) { |
| tok->done = E_DEDENT; |
| tok->cur = tok->inp; |
| return ERRORTOKEN; |
| } |
| if (altcol != tok->altindstack[tok->indent]) { |
| if (indenterror(tok)) |
| return ERRORTOKEN; |
| } |
| } |
| } |
| } |
| |
| tok->start = tok->cur; |
| |
| /* Return pending indents/dedents */ |
| if (tok->pendin != 0) { |
| if (tok->pendin < 0) { |
| tok->pendin++; |
| return DEDENT; |
| } |
| else { |
| tok->pendin--; |
| return INDENT; |
| } |
| } |
| |
| again: |
| tok->start = NULL; |
| /* Skip spaces */ |
| do { |
| c = tok_nextc(tok); |
| } while (c == ' ' || c == '\t' || c == '\014'); |
| |
| /* Set start of current token */ |
| tok->start = tok->cur - 1; |
| |
| /* Skip comment, while looking for tab-setting magic */ |
| if (c == '#') { |
| static char *tabforms[] = { |
| "tab-width:", /* Emacs */ |
| ":tabstop=", /* vim, full form */ |
| ":ts=", /* vim, abbreviated form */ |
| "set tabsize=", /* will vi never die? */ |
| /* more templates can be added here to support other editors */ |
| }; |
| char cbuf[80]; |
| char *tp, **cp; |
| tp = cbuf; |
| do { |
| *tp++ = c = tok_nextc(tok); |
| } while (c != EOF && c != '\n' && |
| (size_t)(tp - cbuf + 1) < sizeof(cbuf)); |
| *tp = '\0'; |
| for (cp = tabforms; |
| cp < tabforms + sizeof(tabforms)/sizeof(tabforms[0]); |
| cp++) { |
| if ((tp = strstr(cbuf, *cp))) { |
| int newsize = atoi(tp + strlen(*cp)); |
| |
| if (newsize >= 1 && newsize <= 40) { |
| tok->tabsize = newsize; |
| if (Py_VerboseFlag) |
| PySys_WriteStderr( |
| "Tab size set to %d\n", |
| newsize); |
| } |
| } |
| } |
| while (c != EOF && c != '\n') |
| c = tok_nextc(tok); |
| } |
| |
| /* Check for EOF and errors now */ |
| if (c == EOF) { |
| return tok->done == E_EOF ? ENDMARKER : ERRORTOKEN; |
| } |
| |
| /* Identifier (most frequent token!) */ |
| if (Py_ISALPHA(c) || c == '_') { |
| /* Process r"", u"" and ur"" */ |
| switch (c) { |
| case 'b': |
| case 'B': |
| c = tok_nextc(tok); |
| if (c == 'r' || c == 'R') |
| c = tok_nextc(tok); |
| if (c == '"' || c == '\'') |
| goto letter_quote; |
| break; |
| case 'r': |
| case 'R': |
| c = tok_nextc(tok); |
| if (c == '"' || c == '\'') |
| goto letter_quote; |
| break; |
| case 'u': |
| case 'U': |
| c = tok_nextc(tok); |
| if (c == 'r' || c == 'R') |
| c = tok_nextc(tok); |
| if (c == '"' || c == '\'') |
| goto letter_quote; |
| break; |
| } |
| while (Py_ISALNUM(c) || c == '_') { |
| c = tok_nextc(tok); |
| } |
| tok_backup(tok, c); |
| *p_start = tok->start; |
| *p_end = tok->cur; |
| return NAME; |
| } |
| |
| /* Newline */ |
| if (c == '\n') { |
| tok->atbol = 1; |
| if (blankline || tok->level > 0) |
| goto nextline; |
| *p_start = tok->start; |
| *p_end = tok->cur - 1; /* Leave '\n' out of the string */ |
| tok->cont_line = 0; |
| return NEWLINE; |
| } |
| |
| /* Period or number starting with period? */ |
| if (c == '.') { |
| c = tok_nextc(tok); |
| if (isdigit(c)) { |
| goto fraction; |
| } |
| else { |
| tok_backup(tok, c); |
| *p_start = tok->start; |
| *p_end = tok->cur; |
| return DOT; |
| } |
| } |
| |
| /* Number */ |
| if (isdigit(c)) { |
| if (c == '0') { |
| /* Hex, octal or binary -- maybe. */ |
| c = tok_nextc(tok); |
| if (c == '.') |
| goto fraction; |
| #ifndef WITHOUT_COMPLEX |
| if (c == 'j' || c == 'J') |
| goto imaginary; |
| #endif |
| if (c == 'x' || c == 'X') { |
| |
| /* Hex */ |
| c = tok_nextc(tok); |
| if (!isxdigit(c)) { |
| tok->done = E_TOKEN; |
| tok_backup(tok, c); |
| return ERRORTOKEN; |
| } |
| do { |
| c = tok_nextc(tok); |
| } while (isxdigit(c)); |
| } |
| else if (c == 'o' || c == 'O') { |
| /* Octal */ |
| c = tok_nextc(tok); |
| if (c < '0' || c >= '8') { |
| tok->done = E_TOKEN; |
| tok_backup(tok, c); |
| return ERRORTOKEN; |
| } |
| do { |
| c = tok_nextc(tok); |
| } while ('0' <= c && c < '8'); |
| } |
| else if (c == 'b' || c == 'B') { |
| /* Binary */ |
| c = tok_nextc(tok); |
| if (c != '0' && c != '1') { |
| tok->done = E_TOKEN; |
| tok_backup(tok, c); |
| return ERRORTOKEN; |
| } |
| do { |
| c = tok_nextc(tok); |
| } while (c == '0' || c == '1'); |
| } |
| else { |
| int found_decimal = 0; |
| /* Octal; c is first char of it */ |
| /* There's no 'isoctdigit' macro, sigh */ |
| while ('0' <= c && c < '8') { |
| c = tok_nextc(tok); |
| } |
| if (isdigit(c)) { |
| found_decimal = 1; |
| do { |
| c = tok_nextc(tok); |
| } while (isdigit(c)); |
| } |
| if (c == '.') |
| goto fraction; |
| else if (c == 'e' || c == 'E') |
| goto exponent; |
| #ifndef WITHOUT_COMPLEX |
| else if (c == 'j' || c == 'J') |
| goto imaginary; |
| #endif |
| else if (found_decimal) { |
| tok->done = E_TOKEN; |
| tok_backup(tok, c); |
| return ERRORTOKEN; |
| } |
| } |
| if (c == 'l' || c == 'L') |
| c = tok_nextc(tok); |
| } |
| else { |
| /* Decimal */ |
| do { |
| c = tok_nextc(tok); |
| } while (isdigit(c)); |
| if (c == 'l' || c == 'L') |
| c = tok_nextc(tok); |
| else { |
| /* Accept floating point numbers. */ |
| if (c == '.') { |
| fraction: |
| /* Fraction */ |
| do { |
| c = tok_nextc(tok); |
| } while (isdigit(c)); |
| } |
| if (c == 'e' || c == 'E') { |
| exponent: |
| /* Exponent part */ |
| c = tok_nextc(tok); |
| if (c == '+' || c == '-') |
| c = tok_nextc(tok); |
| if (!isdigit(c)) { |
| tok->done = E_TOKEN; |
| tok_backup(tok, c); |
| return ERRORTOKEN; |
| } |
| do { |
| c = tok_nextc(tok); |
| } while (isdigit(c)); |
| } |
| #ifndef WITHOUT_COMPLEX |
| if (c == 'j' || c == 'J') |
| /* Imaginary part */ |
| imaginary: |
| c = tok_nextc(tok); |
| #endif |
| } |
| } |
| tok_backup(tok, c); |
| *p_start = tok->start; |
| *p_end = tok->cur; |
| return NUMBER; |
| } |
| |
| letter_quote: |
| /* String */ |
| if (c == '\'' || c == '"') { |
| Py_ssize_t quote2 = tok->cur - tok->start + 1; |
| int quote = c; |
| int triple = 0; |
| int tripcount = 0; |
| for (;;) { |
| c = tok_nextc(tok); |
| if (c == '\n') { |
| if (!triple) { |
| tok->done = E_EOLS; |
| tok_backup(tok, c); |
| return ERRORTOKEN; |
| } |
| tripcount = 0; |
| tok->cont_line = 1; /* multiline string. */ |
| } |
| else if (c == EOF) { |
| if (triple) |
| tok->done = E_EOFS; |
| else |
| tok->done = E_EOLS; |
| tok->cur = tok->inp; |
| return ERRORTOKEN; |
| } |
| else if (c == quote) { |
| tripcount++; |
| if (tok->cur - tok->start == quote2) { |
| c = tok_nextc(tok); |
| if (c == quote) { |
| triple = 1; |
| tripcount = 0; |
| continue; |
| } |
| tok_backup(tok, c); |
| } |
| if (!triple || tripcount == 3) |
| break; |
| } |
| else if (c == '\\') { |
| tripcount = 0; |
| c = tok_nextc(tok); |
| if (c == EOF) { |
| tok->done = E_EOLS; |
| tok->cur = tok->inp; |
| return ERRORTOKEN; |
| } |
| } |
| else |
| tripcount = 0; |
| } |
| *p_start = tok->start; |
| *p_end = tok->cur; |
| return STRING; |
| } |
| |
| /* Line continuation */ |
| if (c == '\\') { |
| c = tok_nextc(tok); |
| if (c != '\n') { |
| tok->done = E_LINECONT; |
| tok->cur = tok->inp; |
| return ERRORTOKEN; |
| } |
| tok->cont_line = 1; |
| goto again; /* Read next line */ |
| } |
| |
| /* Check for two-character token */ |
| { |
| int c2 = tok_nextc(tok); |
| int token = PyToken_TwoChars(c, c2); |
| #ifndef PGEN |
| if (Py_Py3kWarningFlag && token == NOTEQUAL && c == '<') { |
| if (PyErr_WarnExplicit(PyExc_DeprecationWarning, |
| "<> not supported in 3.x; use !=", |
| tok->filename, tok->lineno, |
| NULL, NULL)) { |
| return ERRORTOKEN; |
| } |
| } |
| #endif |
| if (token != OP) { |
| int c3 = tok_nextc(tok); |
| int token3 = PyToken_ThreeChars(c, c2, c3); |
| if (token3 != OP) { |
| token = token3; |
| } else { |
| tok_backup(tok, c3); |
| } |
| *p_start = tok->start; |
| *p_end = tok->cur; |
| return token; |
| } |
| tok_backup(tok, c2); |
| } |
| |
| /* Keep track of parentheses nesting level */ |
| switch (c) { |
| case '(': |
| case '[': |
| case '{': |
| tok->level++; |
| break; |
| case ')': |
| case ']': |
| case '}': |
| tok->level--; |
| break; |
| } |
| |
| /* Punctuation character */ |
| *p_start = tok->start; |
| *p_end = tok->cur; |
| return PyToken_OneChar(c); |
| } |
| |
| int |
| PyTokenizer_Get(struct tok_state *tok, char **p_start, char **p_end) |
| { |
| int result = tok_get(tok, p_start, p_end); |
| if (tok->decoding_erred) { |
| result = ERRORTOKEN; |
| tok->done = E_DECODE; |
| } |
| return result; |
| } |
| |
| /* This function is only called from parsetok. However, it cannot live |
| there, as it must be empty for PGEN, and we can check for PGEN only |
| in this file. */ |
| |
| #if defined(PGEN) || !defined(Py_USING_UNICODE) |
| char* |
| PyTokenizer_RestoreEncoding(struct tok_state* tok, int len, int* offset) |
| { |
| return NULL; |
| } |
| #else |
| #ifdef Py_USING_UNICODE |
| static PyObject * |
| dec_utf8(const char *enc, const char *text, size_t len) { |
| PyObject *ret = NULL; |
| PyObject *unicode_text = PyUnicode_DecodeUTF8(text, len, "replace"); |
| if (unicode_text) { |
| ret = PyUnicode_AsEncodedString(unicode_text, enc, "replace"); |
| Py_DECREF(unicode_text); |
| } |
| if (!ret) { |
| PyErr_Clear(); |
| } |
| return ret; |
| } |
| char * |
| PyTokenizer_RestoreEncoding(struct tok_state* tok, int len, int *offset) |
| { |
| char *text = NULL; |
| if (tok->encoding) { |
| /* convert source to original encondig */ |
| PyObject *lineobj = dec_utf8(tok->encoding, tok->buf, len); |
| if (lineobj != NULL) { |
| int linelen = PyString_Size(lineobj); |
| const char *line = PyString_AsString(lineobj); |
| text = PyObject_MALLOC(linelen + 1); |
| if (text != NULL && line != NULL) { |
| if (linelen) |
| strncpy(text, line, linelen); |
| text[linelen] = '\0'; |
| } |
| Py_DECREF(lineobj); |
| |
| /* adjust error offset */ |
| if (*offset > 1) { |
| PyObject *offsetobj = dec_utf8(tok->encoding, |
| tok->buf, *offset-1); |
| if (offsetobj) { |
| *offset = PyString_Size(offsetobj) + 1; |
| Py_DECREF(offsetobj); |
| } |
| } |
| |
| } |
| } |
| return text; |
| |
| } |
| #endif /* defined(Py_USING_UNICODE) */ |
| #endif |
| |
| |
| #ifdef Py_DEBUG |
| |
| void |
| tok_dump(int type, char *start, char *end) |
| { |
| printf("%s", _PyParser_TokenNames[type]); |
| if (type == NAME || type == NUMBER || type == STRING || type == OP) |
| printf("(%.*s)", (int)(end - start), start); |
| } |
| |
| #endif |