| /* 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 (c != EOF && (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 |