Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 1 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 2 | /* Tokenizer implementation */ |
| 3 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 4 | #include "pgenheaders.h" |
| 5 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 6 | #include <ctype.h> |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 7 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 8 | #include "tokenizer.h" |
| 9 | #include "errcode.h" |
| 10 | |
Tim Peters | dbd9ba6 | 2000-07-09 03:09:57 +0000 | [diff] [blame] | 11 | extern char *PyOS_Readline(char *); |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 12 | /* Return malloc'ed string including trailing \n; |
| 13 | empty malloc'ed string for EOF; |
| 14 | NULL if interrupted */ |
| 15 | |
Guido van Rossum | 4fe8729 | 1992-02-26 15:24:44 +0000 | [diff] [blame] | 16 | /* Don't ever change this -- it would break the portability of Python code */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 17 | #define TABSIZE 8 |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 18 | |
Guido van Rossum | cf57d8b | 1998-01-19 22:07:46 +0000 | [diff] [blame] | 19 | /* Convert a possibly signed character to a nonnegative int */ |
| 20 | /* XXX This assumes characters are 8 bits wide */ |
| 21 | #ifdef __CHAR_UNSIGNED__ |
| 22 | #define Py_CHARMASK(c) (c) |
| 23 | #else |
| 24 | #define Py_CHARMASK(c) ((c) & 0xff) |
| 25 | #endif |
| 26 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 27 | /* Forward */ |
Tim Peters | dbd9ba6 | 2000-07-09 03:09:57 +0000 | [diff] [blame] | 28 | static struct tok_state *tok_new(void); |
| 29 | static int tok_nextc(struct tok_state *tok); |
| 30 | static void tok_backup(struct tok_state *tok, int c); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 31 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 32 | /* Token names */ |
| 33 | |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 34 | char *_PyParser_TokenNames[] = { |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 35 | "ENDMARKER", |
| 36 | "NAME", |
| 37 | "NUMBER", |
| 38 | "STRING", |
| 39 | "NEWLINE", |
| 40 | "INDENT", |
| 41 | "DEDENT", |
| 42 | "LPAR", |
| 43 | "RPAR", |
| 44 | "LSQB", |
| 45 | "RSQB", |
| 46 | "COLON", |
| 47 | "COMMA", |
| 48 | "SEMI", |
| 49 | "PLUS", |
| 50 | "MINUS", |
| 51 | "STAR", |
| 52 | "SLASH", |
| 53 | "VBAR", |
| 54 | "AMPER", |
| 55 | "LESS", |
| 56 | "GREATER", |
| 57 | "EQUAL", |
| 58 | "DOT", |
| 59 | "PERCENT", |
| 60 | "BACKQUOTE", |
| 61 | "LBRACE", |
| 62 | "RBRACE", |
Guido van Rossum | fbab905 | 1991-10-20 20:25:03 +0000 | [diff] [blame] | 63 | "EQEQUAL", |
| 64 | "NOTEQUAL", |
| 65 | "LESSEQUAL", |
| 66 | "GREATEREQUAL", |
Guido van Rossum | baf0ebf | 1991-10-24 14:59:40 +0000 | [diff] [blame] | 67 | "TILDE", |
| 68 | "CIRCUMFLEX", |
| 69 | "LEFTSHIFT", |
| 70 | "RIGHTSHIFT", |
Guido van Rossum | f595fde | 1996-01-12 01:31:58 +0000 | [diff] [blame] | 71 | "DOUBLESTAR", |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 72 | "PLUSEQUAL", |
| 73 | "MINEQUAL", |
| 74 | "STAREQUAL", |
| 75 | "SLASHEQUAL", |
| 76 | "PERCENTEQUAL", |
| 77 | "AMPEREQUAL", |
| 78 | "VBAREQUAL", |
| 79 | "CIRCUMFLEXEQUAL", |
| 80 | "LEFTSHIFTEQUAL", |
| 81 | "RIGHTSHIFTEQUAL", |
| 82 | "DOUBLESTAREQUAL", |
Guido van Rossum | fbab905 | 1991-10-20 20:25:03 +0000 | [diff] [blame] | 83 | /* This table must match the #defines in token.h! */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 84 | "OP", |
| 85 | "<ERRORTOKEN>", |
| 86 | "<N_TOKENS>" |
| 87 | }; |
| 88 | |
| 89 | |
| 90 | /* Create and initialize a new tok_state structure */ |
| 91 | |
| 92 | static struct tok_state * |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 93 | tok_new(void) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 94 | { |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 95 | struct tok_state *tok = PyMem_NEW(struct tok_state, 1); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 96 | if (tok == NULL) |
| 97 | return NULL; |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 98 | tok->buf = tok->cur = tok->end = tok->inp = tok->start = NULL; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 99 | tok->done = E_OK; |
| 100 | tok->fp = NULL; |
| 101 | tok->tabsize = TABSIZE; |
| 102 | tok->indent = 0; |
| 103 | tok->indstack[0] = 0; |
| 104 | tok->atbol = 1; |
| 105 | tok->pendin = 0; |
| 106 | tok->prompt = tok->nextprompt = NULL; |
| 107 | tok->lineno = 0; |
Guido van Rossum | a849b83 | 1993-05-12 11:35:44 +0000 | [diff] [blame] | 108 | tok->level = 0; |
Guido van Rossum | 926f13a | 1998-04-09 21:38:06 +0000 | [diff] [blame] | 109 | tok->filename = NULL; |
| 110 | tok->altwarning = 0; |
| 111 | tok->alterror = 0; |
| 112 | tok->alttabsize = 1; |
| 113 | tok->altindstack[0] = 0; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 114 | return tok; |
| 115 | } |
| 116 | |
| 117 | |
| 118 | /* Set up tokenizer for string */ |
| 119 | |
| 120 | struct tok_state * |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 121 | PyTokenizer_FromString(char *str) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 122 | { |
| 123 | struct tok_state *tok = tok_new(); |
| 124 | if (tok == NULL) |
| 125 | return NULL; |
Guido van Rossum | 1a817c0 | 1994-09-19 08:06:25 +0000 | [diff] [blame] | 126 | tok->buf = tok->cur = tok->end = tok->inp = str; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 127 | return tok; |
| 128 | } |
| 129 | |
| 130 | |
Guido van Rossum | 8c11a5c | 1991-07-27 21:42:56 +0000 | [diff] [blame] | 131 | /* Set up tokenizer for file */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 132 | |
| 133 | struct tok_state * |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 134 | PyTokenizer_FromFile(FILE *fp, char *ps1, char *ps2) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 135 | { |
| 136 | struct tok_state *tok = tok_new(); |
| 137 | if (tok == NULL) |
| 138 | return NULL; |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 139 | if ((tok->buf = PyMem_NEW(char, BUFSIZ)) == NULL) { |
| 140 | PyMem_DEL(tok); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 141 | return NULL; |
| 142 | } |
| 143 | tok->cur = tok->inp = tok->buf; |
| 144 | tok->end = tok->buf + BUFSIZ; |
| 145 | tok->fp = fp; |
| 146 | tok->prompt = ps1; |
| 147 | tok->nextprompt = ps2; |
| 148 | return tok; |
| 149 | } |
| 150 | |
| 151 | |
| 152 | /* Free a tok_state structure */ |
| 153 | |
| 154 | void |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 155 | PyTokenizer_Free(struct tok_state *tok) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 156 | { |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 157 | if (tok->fp != NULL && tok->buf != NULL) |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 158 | PyMem_DEL(tok->buf); |
| 159 | PyMem_DEL(tok); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 160 | } |
| 161 | |
| 162 | |
| 163 | /* Get next char, updating state; error code goes into tok->done */ |
| 164 | |
| 165 | static int |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 166 | tok_nextc(register struct tok_state *tok) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 167 | { |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 168 | for (;;) { |
Guido van Rossum | 1a817c0 | 1994-09-19 08:06:25 +0000 | [diff] [blame] | 169 | if (tok->cur != tok->inp) { |
Guido van Rossum | cf57d8b | 1998-01-19 22:07:46 +0000 | [diff] [blame] | 170 | return Py_CHARMASK(*tok->cur++); /* Fast path */ |
Guido van Rossum | 1a817c0 | 1994-09-19 08:06:25 +0000 | [diff] [blame] | 171 | } |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 172 | if (tok->done != E_OK) |
| 173 | return EOF; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 174 | if (tok->fp == NULL) { |
Guido van Rossum | 1a817c0 | 1994-09-19 08:06:25 +0000 | [diff] [blame] | 175 | char *end = strchr(tok->inp, '\n'); |
| 176 | if (end != NULL) |
| 177 | end++; |
| 178 | else { |
| 179 | end = strchr(tok->inp, '\0'); |
| 180 | if (end == tok->inp) { |
| 181 | tok->done = E_EOF; |
| 182 | return EOF; |
| 183 | } |
| 184 | } |
| 185 | if (tok->start == NULL) |
| 186 | tok->buf = tok->cur; |
| 187 | tok->lineno++; |
| 188 | tok->inp = end; |
Guido van Rossum | cf57d8b | 1998-01-19 22:07:46 +0000 | [diff] [blame] | 189 | return Py_CHARMASK(*tok->cur++); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 190 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 191 | if (tok->prompt != NULL) { |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 192 | char *new = PyOS_Readline(tok->prompt); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 193 | if (tok->nextprompt != NULL) |
| 194 | tok->prompt = tok->nextprompt; |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 195 | if (new == NULL) |
| 196 | tok->done = E_INTR; |
| 197 | else if (*new == '\0') { |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 198 | PyMem_FREE(new); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 199 | tok->done = E_EOF; |
| 200 | } |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 201 | else if (tok->start != NULL) { |
Guido van Rossum | 6da3434 | 2000-06-28 22:00:02 +0000 | [diff] [blame] | 202 | size_t start = tok->start - tok->buf; |
| 203 | size_t oldlen = tok->cur - tok->buf; |
| 204 | size_t newlen = oldlen + strlen(new); |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 205 | char *buf = tok->buf; |
| 206 | PyMem_RESIZE(buf, char, newlen+1); |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 207 | tok->lineno++; |
| 208 | if (buf == NULL) { |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 209 | PyMem_DEL(tok->buf); |
Guido van Rossum | 588633d | 1994-12-30 15:46:02 +0000 | [diff] [blame] | 210 | tok->buf = NULL; |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 211 | PyMem_FREE(new); |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 212 | tok->done = E_NOMEM; |
| 213 | return EOF; |
| 214 | } |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 215 | tok->buf = buf; |
| 216 | tok->cur = tok->buf + oldlen; |
| 217 | strcpy(tok->buf + oldlen, new); |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 218 | PyMem_FREE(new); |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 219 | tok->inp = tok->buf + newlen; |
| 220 | tok->end = tok->inp + 1; |
| 221 | tok->start = tok->buf + start; |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 222 | } |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 223 | else { |
| 224 | tok->lineno++; |
| 225 | if (tok->buf != NULL) |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 226 | PyMem_DEL(tok->buf); |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 227 | tok->buf = new; |
| 228 | tok->cur = tok->buf; |
| 229 | tok->inp = strchr(tok->buf, '\0'); |
| 230 | tok->end = tok->inp + 1; |
| 231 | } |
| 232 | } |
| 233 | else { |
| 234 | int done = 0; |
| 235 | int cur = 0; |
Guido van Rossum | 2e96eb9 | 1995-06-14 18:26:02 +0000 | [diff] [blame] | 236 | char *pt; |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 237 | if (tok->start == NULL) { |
| 238 | if (tok->buf == NULL) { |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 239 | tok->buf = PyMem_NEW(char, BUFSIZ); |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 240 | if (tok->buf == NULL) { |
| 241 | tok->done = E_NOMEM; |
| 242 | return EOF; |
| 243 | } |
| 244 | tok->end = tok->buf + BUFSIZ; |
| 245 | } |
| 246 | if (fgets(tok->buf, (int)(tok->end - tok->buf), |
| 247 | tok->fp) == NULL) { |
| 248 | tok->done = E_EOF; |
| 249 | done = 1; |
| 250 | } |
| 251 | else { |
| 252 | tok->done = E_OK; |
| 253 | tok->inp = strchr(tok->buf, '\0'); |
| 254 | done = tok->inp[-1] == '\n'; |
| 255 | } |
| 256 | } |
| 257 | else { |
| 258 | cur = tok->cur - tok->buf; |
Guido van Rossum | 78c0535 | 1995-01-17 16:12:13 +0000 | [diff] [blame] | 259 | if (feof(tok->fp)) { |
| 260 | tok->done = E_EOF; |
| 261 | done = 1; |
| 262 | } |
| 263 | else |
| 264 | tok->done = E_OK; |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 265 | } |
| 266 | tok->lineno++; |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 267 | /* Read until '\n' or EOF */ |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 268 | while (!done) { |
| 269 | int curstart = tok->start == NULL ? -1 : |
| 270 | tok->start - tok->buf; |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 271 | int curvalid = tok->inp - tok->buf; |
Guido van Rossum | 3f6bb86 | 1995-09-21 20:36:34 +0000 | [diff] [blame] | 272 | int newsize = curvalid + BUFSIZ; |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 273 | char *newbuf = tok->buf; |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 274 | PyMem_RESIZE(newbuf, char, newsize); |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 275 | if (newbuf == NULL) { |
| 276 | tok->done = E_NOMEM; |
| 277 | tok->cur = tok->inp; |
| 278 | return EOF; |
| 279 | } |
| 280 | tok->buf = newbuf; |
| 281 | tok->inp = tok->buf + curvalid; |
| 282 | tok->end = tok->buf + newsize; |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 283 | tok->start = curstart < 0 ? NULL : |
| 284 | tok->buf + curstart; |
| 285 | if (fgets(tok->inp, |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 286 | (int)(tok->end - tok->inp), |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 287 | tok->fp) == NULL) { |
| 288 | /* Last line does not end in \n, |
| 289 | fake one */ |
| 290 | strcpy(tok->inp, "\n"); |
| 291 | } |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 292 | tok->inp = strchr(tok->inp, '\0'); |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 293 | done = tok->inp[-1] == '\n'; |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 294 | } |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 295 | tok->cur = tok->buf + cur; |
Guido van Rossum | 2d45be1 | 1997-04-11 19:16:25 +0000 | [diff] [blame] | 296 | #ifndef macintosh |
Guido van Rossum | 2e96eb9 | 1995-06-14 18:26:02 +0000 | [diff] [blame] | 297 | /* replace "\r\n" with "\n" */ |
Guido van Rossum | 2d45be1 | 1997-04-11 19:16:25 +0000 | [diff] [blame] | 298 | /* For Mac we leave the \r, giving a syntax error */ |
Guido van Rossum | 2e96eb9 | 1995-06-14 18:26:02 +0000 | [diff] [blame] | 299 | pt = tok->inp - 2; |
| 300 | if (pt >= tok->buf && *pt == '\r') { |
| 301 | *pt++ = '\n'; |
| 302 | *pt = '\0'; |
| 303 | tok->inp = pt; |
| 304 | } |
Guido van Rossum | 2d45be1 | 1997-04-11 19:16:25 +0000 | [diff] [blame] | 305 | #endif |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 306 | } |
| 307 | if (tok->done != E_OK) { |
| 308 | if (tok->prompt != NULL) |
Guido van Rossum | 6e73bf4 | 1998-08-25 18:13:04 +0000 | [diff] [blame] | 309 | PySys_WriteStderr("\n"); |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 310 | tok->cur = tok->inp; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 311 | return EOF; |
| 312 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 313 | } |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 314 | /*NOTREACHED*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 315 | } |
| 316 | |
| 317 | |
| 318 | /* Back-up one character */ |
| 319 | |
| 320 | static void |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 321 | tok_backup(register struct tok_state *tok, register int c) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 322 | { |
| 323 | if (c != EOF) { |
Guido van Rossum | 588633d | 1994-12-30 15:46:02 +0000 | [diff] [blame] | 324 | if (--tok->cur < tok->buf) |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 325 | Py_FatalError("tok_backup: begin of buffer"); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 326 | if (*tok->cur != c) |
| 327 | *tok->cur = c; |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | |
| 332 | /* Return the token corresponding to a single character */ |
| 333 | |
| 334 | int |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 335 | PyToken_OneChar(int c) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 336 | { |
| 337 | switch (c) { |
| 338 | case '(': return LPAR; |
| 339 | case ')': return RPAR; |
| 340 | case '[': return LSQB; |
| 341 | case ']': return RSQB; |
| 342 | case ':': return COLON; |
| 343 | case ',': return COMMA; |
| 344 | case ';': return SEMI; |
| 345 | case '+': return PLUS; |
| 346 | case '-': return MINUS; |
| 347 | case '*': return STAR; |
| 348 | case '/': return SLASH; |
| 349 | case '|': return VBAR; |
| 350 | case '&': return AMPER; |
| 351 | case '<': return LESS; |
| 352 | case '>': return GREATER; |
| 353 | case '=': return EQUAL; |
| 354 | case '.': return DOT; |
| 355 | case '%': return PERCENT; |
| 356 | case '`': return BACKQUOTE; |
| 357 | case '{': return LBRACE; |
| 358 | case '}': return RBRACE; |
Guido van Rossum | baf0ebf | 1991-10-24 14:59:40 +0000 | [diff] [blame] | 359 | case '^': return CIRCUMFLEX; |
| 360 | case '~': return TILDE; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 361 | default: return OP; |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | |
Guido van Rossum | fbab905 | 1991-10-20 20:25:03 +0000 | [diff] [blame] | 366 | int |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 367 | PyToken_TwoChars(int c1, int c2) |
Guido van Rossum | fbab905 | 1991-10-20 20:25:03 +0000 | [diff] [blame] | 368 | { |
| 369 | switch (c1) { |
| 370 | case '=': |
| 371 | switch (c2) { |
| 372 | case '=': return EQEQUAL; |
| 373 | } |
| 374 | break; |
| 375 | case '!': |
| 376 | switch (c2) { |
| 377 | case '=': return NOTEQUAL; |
| 378 | } |
| 379 | break; |
| 380 | case '<': |
| 381 | switch (c2) { |
| 382 | case '>': return NOTEQUAL; |
| 383 | case '=': return LESSEQUAL; |
Guido van Rossum | baf0ebf | 1991-10-24 14:59:40 +0000 | [diff] [blame] | 384 | case '<': return LEFTSHIFT; |
Guido van Rossum | fbab905 | 1991-10-20 20:25:03 +0000 | [diff] [blame] | 385 | } |
| 386 | break; |
| 387 | case '>': |
| 388 | switch (c2) { |
| 389 | case '=': return GREATEREQUAL; |
Guido van Rossum | baf0ebf | 1991-10-24 14:59:40 +0000 | [diff] [blame] | 390 | case '>': return RIGHTSHIFT; |
Guido van Rossum | fbab905 | 1991-10-20 20:25:03 +0000 | [diff] [blame] | 391 | } |
| 392 | break; |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 393 | case '+': |
| 394 | switch (c2) { |
| 395 | case '=': return PLUSEQUAL; |
| 396 | } |
| 397 | break; |
| 398 | case '-': |
| 399 | switch (c2) { |
| 400 | case '=': return MINEQUAL; |
| 401 | } |
| 402 | break; |
Guido van Rossum | f595fde | 1996-01-12 01:31:58 +0000 | [diff] [blame] | 403 | case '*': |
| 404 | switch (c2) { |
| 405 | case '*': return DOUBLESTAR; |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 406 | case '=': return STAREQUAL; |
| 407 | } |
| 408 | break; |
| 409 | case '/': |
| 410 | switch (c2) { |
| 411 | case '=': return SLASHEQUAL; |
| 412 | } |
| 413 | break; |
| 414 | case '|': |
| 415 | switch (c2) { |
| 416 | case '=': return VBAREQUAL; |
| 417 | } |
| 418 | break; |
| 419 | case '%': |
| 420 | switch (c2) { |
| 421 | case '=': return PERCENTEQUAL; |
| 422 | } |
| 423 | break; |
| 424 | case '&': |
| 425 | switch (c2) { |
| 426 | case '=': return AMPEREQUAL; |
| 427 | } |
| 428 | break; |
| 429 | case '^': |
| 430 | switch (c2) { |
| 431 | case '=': return CIRCUMFLEXEQUAL; |
Guido van Rossum | f595fde | 1996-01-12 01:31:58 +0000 | [diff] [blame] | 432 | } |
| 433 | break; |
Guido van Rossum | fbab905 | 1991-10-20 20:25:03 +0000 | [diff] [blame] | 434 | } |
| 435 | return OP; |
| 436 | } |
| 437 | |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 438 | int |
| 439 | PyToken_ThreeChars(int c1, int c2, int c3) |
| 440 | { |
| 441 | switch (c1) { |
| 442 | case '<': |
| 443 | switch (c2) { |
| 444 | case '<': |
| 445 | switch (c3) { |
| 446 | case '=': |
| 447 | return LEFTSHIFTEQUAL; |
| 448 | break; |
| 449 | } |
| 450 | break; |
| 451 | } |
| 452 | break; |
| 453 | case '>': |
| 454 | switch (c2) { |
| 455 | case '>': |
| 456 | switch (c3) { |
| 457 | case '=': |
| 458 | return RIGHTSHIFTEQUAL; |
| 459 | break; |
| 460 | } |
| 461 | break; |
| 462 | } |
| 463 | break; |
| 464 | case '*': |
| 465 | switch (c2) { |
| 466 | case '*': |
| 467 | switch (c3) { |
| 468 | case '=': |
| 469 | return DOUBLESTAREQUAL; |
| 470 | break; |
| 471 | } |
| 472 | break; |
| 473 | } |
| 474 | break; |
| 475 | } |
| 476 | return OP; |
| 477 | } |
Guido van Rossum | fbab905 | 1991-10-20 20:25:03 +0000 | [diff] [blame] | 478 | |
Guido van Rossum | 926f13a | 1998-04-09 21:38:06 +0000 | [diff] [blame] | 479 | static int |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 480 | indenterror(struct tok_state *tok) |
Guido van Rossum | 926f13a | 1998-04-09 21:38:06 +0000 | [diff] [blame] | 481 | { |
| 482 | if (tok->alterror) { |
Fred Drake | 85f3639 | 2000-07-11 17:53:00 +0000 | [diff] [blame] | 483 | tok->done = E_TABSPACE; |
Guido van Rossum | 926f13a | 1998-04-09 21:38:06 +0000 | [diff] [blame] | 484 | tok->cur = tok->inp; |
| 485 | return 1; |
| 486 | } |
| 487 | if (tok->altwarning) { |
Fred Drake | 85f3639 | 2000-07-11 17:53:00 +0000 | [diff] [blame] | 488 | PySys_WriteStderr("%s: inconsistent use of tabs and spaces " |
| 489 | "in indentation\n", tok->filename); |
Guido van Rossum | 926f13a | 1998-04-09 21:38:06 +0000 | [diff] [blame] | 490 | tok->altwarning = 0; |
| 491 | } |
| 492 | return 0; |
| 493 | } |
| 494 | |
| 495 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 496 | /* Get next token, after space stripping etc. */ |
| 497 | |
| 498 | int |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 499 | PyTokenizer_Get(register struct tok_state *tok, char **p_start, |
| 500 | char **p_end) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 501 | { |
| 502 | register int c; |
Guido van Rossum | 8c11a5c | 1991-07-27 21:42:56 +0000 | [diff] [blame] | 503 | int blankline; |
| 504 | |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 505 | *p_start = *p_end = NULL; |
Guido van Rossum | 8c11a5c | 1991-07-27 21:42:56 +0000 | [diff] [blame] | 506 | nextline: |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 507 | tok->start = NULL; |
Guido van Rossum | 8c11a5c | 1991-07-27 21:42:56 +0000 | [diff] [blame] | 508 | blankline = 0; |
| 509 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 510 | /* Get indentation level */ |
| 511 | if (tok->atbol) { |
| 512 | register int col = 0; |
Guido van Rossum | 926f13a | 1998-04-09 21:38:06 +0000 | [diff] [blame] | 513 | register int altcol = 0; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 514 | tok->atbol = 0; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 515 | for (;;) { |
| 516 | c = tok_nextc(tok); |
| 517 | if (c == ' ') |
Guido van Rossum | 926f13a | 1998-04-09 21:38:06 +0000 | [diff] [blame] | 518 | col++, altcol++; |
| 519 | else if (c == '\t') { |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 520 | col = (col/tok->tabsize + 1) * tok->tabsize; |
Guido van Rossum | 926f13a | 1998-04-09 21:38:06 +0000 | [diff] [blame] | 521 | altcol = (altcol/tok->alttabsize + 1) |
| 522 | * tok->alttabsize; |
| 523 | } |
Guido van Rossum | 94d32b1 | 1995-07-07 22:27:27 +0000 | [diff] [blame] | 524 | else if (c == '\014') /* Control-L (formfeed) */ |
Guido van Rossum | 926f13a | 1998-04-09 21:38:06 +0000 | [diff] [blame] | 525 | col = altcol = 0; /* For Emacs users */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 526 | else |
| 527 | break; |
| 528 | } |
| 529 | tok_backup(tok, c); |
Guido van Rossum | 8c11a5c | 1991-07-27 21:42:56 +0000 | [diff] [blame] | 530 | if (c == '#' || c == '\n') { |
| 531 | /* Lines with only whitespace and/or comments |
| 532 | shouldn't affect the indentation and are |
| 533 | not passed to the parser as NEWLINE tokens, |
| 534 | except *totally* empty lines in interactive |
| 535 | mode, which signal the end of a command group. */ |
| 536 | if (col == 0 && c == '\n' && tok->prompt != NULL) |
| 537 | blankline = 0; /* Let it through */ |
| 538 | else |
| 539 | blankline = 1; /* Ignore completely */ |
| 540 | /* We can't jump back right here since we still |
| 541 | may need to skip to the end of a comment */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 542 | } |
Guido van Rossum | a849b83 | 1993-05-12 11:35:44 +0000 | [diff] [blame] | 543 | if (!blankline && tok->level == 0) { |
Guido van Rossum | 8c11a5c | 1991-07-27 21:42:56 +0000 | [diff] [blame] | 544 | if (col == tok->indstack[tok->indent]) { |
| 545 | /* No change */ |
Guido van Rossum | 926f13a | 1998-04-09 21:38:06 +0000 | [diff] [blame] | 546 | if (altcol != tok->altindstack[tok->indent]) { |
| 547 | if (indenterror(tok)) |
| 548 | return ERRORTOKEN; |
| 549 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 550 | } |
Guido van Rossum | 8c11a5c | 1991-07-27 21:42:56 +0000 | [diff] [blame] | 551 | else if (col > tok->indstack[tok->indent]) { |
| 552 | /* Indent -- always one */ |
| 553 | if (tok->indent+1 >= MAXINDENT) { |
Fred Drake | 85f3639 | 2000-07-11 17:53:00 +0000 | [diff] [blame] | 554 | tok->done = E_TOODEEP; |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 555 | tok->cur = tok->inp; |
Guido van Rossum | 8c11a5c | 1991-07-27 21:42:56 +0000 | [diff] [blame] | 556 | return ERRORTOKEN; |
| 557 | } |
Guido van Rossum | 926f13a | 1998-04-09 21:38:06 +0000 | [diff] [blame] | 558 | if (altcol <= tok->altindstack[tok->indent]) { |
| 559 | if (indenterror(tok)) |
| 560 | return ERRORTOKEN; |
| 561 | } |
Guido van Rossum | 8c11a5c | 1991-07-27 21:42:56 +0000 | [diff] [blame] | 562 | tok->pendin++; |
| 563 | tok->indstack[++tok->indent] = col; |
Guido van Rossum | 926f13a | 1998-04-09 21:38:06 +0000 | [diff] [blame] | 564 | tok->altindstack[tok->indent] = altcol; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 565 | } |
Guido van Rossum | 8c11a5c | 1991-07-27 21:42:56 +0000 | [diff] [blame] | 566 | else /* col < tok->indstack[tok->indent] */ { |
| 567 | /* Dedent -- any number, must be consistent */ |
| 568 | while (tok->indent > 0 && |
| 569 | col < tok->indstack[tok->indent]) { |
Guido van Rossum | 8c11a5c | 1991-07-27 21:42:56 +0000 | [diff] [blame] | 570 | tok->pendin--; |
Guido van Rossum | 54758fa | 1998-02-16 22:18:00 +0000 | [diff] [blame] | 571 | tok->indent--; |
Guido van Rossum | 8c11a5c | 1991-07-27 21:42:56 +0000 | [diff] [blame] | 572 | } |
| 573 | if (col != tok->indstack[tok->indent]) { |
Fred Drake | 85f3639 | 2000-07-11 17:53:00 +0000 | [diff] [blame] | 574 | tok->done = E_DEDENT; |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 575 | tok->cur = tok->inp; |
Guido van Rossum | 8c11a5c | 1991-07-27 21:42:56 +0000 | [diff] [blame] | 576 | return ERRORTOKEN; |
| 577 | } |
Guido van Rossum | 926f13a | 1998-04-09 21:38:06 +0000 | [diff] [blame] | 578 | if (altcol != tok->altindstack[tok->indent]) { |
| 579 | if (indenterror(tok)) |
| 580 | return ERRORTOKEN; |
| 581 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 582 | } |
| 583 | } |
| 584 | } |
| 585 | |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 586 | tok->start = tok->cur; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 587 | |
| 588 | /* Return pending indents/dedents */ |
| 589 | if (tok->pendin != 0) { |
| 590 | if (tok->pendin < 0) { |
| 591 | tok->pendin++; |
| 592 | return DEDENT; |
| 593 | } |
| 594 | else { |
| 595 | tok->pendin--; |
| 596 | return INDENT; |
| 597 | } |
| 598 | } |
| 599 | |
| 600 | again: |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 601 | tok->start = NULL; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 602 | /* Skip spaces */ |
| 603 | do { |
| 604 | c = tok_nextc(tok); |
Guido van Rossum | 94d32b1 | 1995-07-07 22:27:27 +0000 | [diff] [blame] | 605 | } while (c == ' ' || c == '\t' || c == '\014'); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 606 | |
| 607 | /* Set start of current token */ |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 608 | tok->start = tok->cur - 1; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 609 | |
Guido van Rossum | ab5ca15 | 2000-03-31 00:52:27 +0000 | [diff] [blame] | 610 | /* Skip comment, while looking for tab-setting magic */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 611 | if (c == '#') { |
Guido van Rossum | ab5ca15 | 2000-03-31 00:52:27 +0000 | [diff] [blame] | 612 | static char *tabforms[] = { |
| 613 | "tab-width:", /* Emacs */ |
| 614 | ":tabstop=", /* vim, full form */ |
| 615 | ":ts=", /* vim, abbreviated form */ |
| 616 | "set tabsize=", /* will vi never die? */ |
| 617 | /* more templates can be added here to support other editors */ |
| 618 | }; |
| 619 | char cbuf[80]; |
| 620 | char *tp, **cp; |
| 621 | tp = cbuf; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 622 | do { |
Guido van Rossum | ab5ca15 | 2000-03-31 00:52:27 +0000 | [diff] [blame] | 623 | *tp++ = c = tok_nextc(tok); |
| 624 | } while (c != EOF && c != '\n' && |
| 625 | tp - cbuf + 1 < sizeof(cbuf)); |
| 626 | *tp = '\0'; |
| 627 | for (cp = tabforms; |
| 628 | cp < tabforms + sizeof(tabforms)/sizeof(tabforms[0]); |
| 629 | cp++) { |
| 630 | if ((tp = strstr(cbuf, *cp))) { |
| 631 | int newsize = atoi(tp + strlen(*cp)); |
| 632 | |
| 633 | if (newsize >= 1 && newsize <= 40) { |
| 634 | tok->tabsize = newsize; |
Guido van Rossum | 6c981ad | 2000-04-03 23:02:17 +0000 | [diff] [blame] | 635 | if (Py_VerboseFlag) |
| 636 | PySys_WriteStderr( |
Guido van Rossum | ab5ca15 | 2000-03-31 00:52:27 +0000 | [diff] [blame] | 637 | "Tab size set to %d\n", |
| 638 | newsize); |
| 639 | } |
| 640 | } |
| 641 | } |
| 642 | while (c != EOF && c != '\n') |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 643 | c = tok_nextc(tok); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 644 | } |
| 645 | |
| 646 | /* Check for EOF and errors now */ |
Guido van Rossum | baf0ebf | 1991-10-24 14:59:40 +0000 | [diff] [blame] | 647 | if (c == EOF) { |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 648 | return tok->done == E_EOF ? ENDMARKER : ERRORTOKEN; |
Guido van Rossum | baf0ebf | 1991-10-24 14:59:40 +0000 | [diff] [blame] | 649 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 650 | |
| 651 | /* Identifier (most frequent token!) */ |
| 652 | if (isalpha(c) || c == '_') { |
Guido van Rossum | 86016cb | 2000-03-10 22:56:54 +0000 | [diff] [blame] | 653 | /* Process r"", u"" and ur"" */ |
Guido van Rossum | 5026cb4 | 1997-04-25 17:32:00 +0000 | [diff] [blame] | 654 | switch (c) { |
| 655 | case 'r': |
| 656 | case 'R': |
| 657 | c = tok_nextc(tok); |
| 658 | if (c == '"' || c == '\'') |
| 659 | goto letter_quote; |
Guido van Rossum | 86016cb | 2000-03-10 22:56:54 +0000 | [diff] [blame] | 660 | break; |
| 661 | case 'u': |
| 662 | case 'U': |
| 663 | c = tok_nextc(tok); |
| 664 | if (c == 'r' || c == 'R') |
| 665 | c = tok_nextc(tok); |
| 666 | if (c == '"' || c == '\'') |
| 667 | goto letter_quote; |
| 668 | break; |
Guido van Rossum | 5026cb4 | 1997-04-25 17:32:00 +0000 | [diff] [blame] | 669 | } |
Guido van Rossum | 24dacb3 | 1997-04-06 03:46:20 +0000 | [diff] [blame] | 670 | while (isalnum(c) || c == '_') { |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 671 | c = tok_nextc(tok); |
Guido van Rossum | 24dacb3 | 1997-04-06 03:46:20 +0000 | [diff] [blame] | 672 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 673 | tok_backup(tok, c); |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 674 | *p_start = tok->start; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 675 | *p_end = tok->cur; |
| 676 | return NAME; |
| 677 | } |
| 678 | |
| 679 | /* Newline */ |
| 680 | if (c == '\n') { |
| 681 | tok->atbol = 1; |
Guido van Rossum | a849b83 | 1993-05-12 11:35:44 +0000 | [diff] [blame] | 682 | if (blankline || tok->level > 0) |
Guido van Rossum | 8c11a5c | 1991-07-27 21:42:56 +0000 | [diff] [blame] | 683 | goto nextline; |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 684 | *p_start = tok->start; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 685 | *p_end = tok->cur - 1; /* Leave '\n' out of the string */ |
| 686 | return NEWLINE; |
| 687 | } |
| 688 | |
Guido van Rossum | 2d45be1 | 1997-04-11 19:16:25 +0000 | [diff] [blame] | 689 | #ifdef macintosh |
| 690 | if (c == '\r') { |
Guido van Rossum | 6e73bf4 | 1998-08-25 18:13:04 +0000 | [diff] [blame] | 691 | PySys_WriteStderr( |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 692 | "File contains \\r characters (incorrect line endings?)\n"); |
Guido van Rossum | 2d45be1 | 1997-04-11 19:16:25 +0000 | [diff] [blame] | 693 | tok->done = E_TOKEN; |
| 694 | tok->cur = tok->inp; |
| 695 | return ERRORTOKEN; |
| 696 | } |
| 697 | #endif |
Guido van Rossum | baf0ebf | 1991-10-24 14:59:40 +0000 | [diff] [blame] | 698 | /* Period or number starting with period? */ |
| 699 | if (c == '.') { |
| 700 | c = tok_nextc(tok); |
| 701 | if (isdigit(c)) { |
| 702 | goto fraction; |
| 703 | } |
| 704 | else { |
| 705 | tok_backup(tok, c); |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 706 | *p_start = tok->start; |
Guido van Rossum | baf0ebf | 1991-10-24 14:59:40 +0000 | [diff] [blame] | 707 | *p_end = tok->cur; |
| 708 | return DOT; |
| 709 | } |
| 710 | } |
Guido van Rossum | f595fde | 1996-01-12 01:31:58 +0000 | [diff] [blame] | 711 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 712 | /* Number */ |
| 713 | if (isdigit(c)) { |
| 714 | if (c == '0') { |
| 715 | /* Hex or octal */ |
| 716 | c = tok_nextc(tok); |
| 717 | if (c == '.') |
| 718 | goto fraction; |
Guido van Rossum | f595fde | 1996-01-12 01:31:58 +0000 | [diff] [blame] | 719 | #ifndef WITHOUT_COMPLEX |
Guido van Rossum | faa436c | 1996-01-26 18:59:07 +0000 | [diff] [blame] | 720 | if (c == 'j' || c == 'J') |
Guido van Rossum | f595fde | 1996-01-12 01:31:58 +0000 | [diff] [blame] | 721 | goto imaginary; |
| 722 | #endif |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 723 | if (c == 'x' || c == 'X') { |
| 724 | /* Hex */ |
| 725 | do { |
| 726 | c = tok_nextc(tok); |
| 727 | } while (isxdigit(c)); |
| 728 | } |
| 729 | else { |
Guido van Rossum | 9430945 | 1991-12-10 14:01:05 +0000 | [diff] [blame] | 730 | /* XXX This is broken! E.g., |
| 731 | 09.9 should be accepted as float! */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 732 | /* Octal; c is first char of it */ |
| 733 | /* There's no 'isoctdigit' macro, sigh */ |
| 734 | while ('0' <= c && c < '8') { |
| 735 | c = tok_nextc(tok); |
| 736 | } |
| 737 | } |
Guido van Rossum | f023c46 | 1991-05-05 20:16:20 +0000 | [diff] [blame] | 738 | if (c == 'l' || c == 'L') |
| 739 | c = tok_nextc(tok); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 740 | } |
| 741 | else { |
| 742 | /* Decimal */ |
| 743 | do { |
| 744 | c = tok_nextc(tok); |
| 745 | } while (isdigit(c)); |
Guido van Rossum | f023c46 | 1991-05-05 20:16:20 +0000 | [diff] [blame] | 746 | if (c == 'l' || c == 'L') |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 747 | c = tok_nextc(tok); |
Guido van Rossum | f023c46 | 1991-05-05 20:16:20 +0000 | [diff] [blame] | 748 | else { |
| 749 | /* Accept floating point numbers. |
| 750 | XXX This accepts incomplete things like |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 751 | XXX 12e or 1e+; worry run-time */ |
Guido van Rossum | f023c46 | 1991-05-05 20:16:20 +0000 | [diff] [blame] | 752 | if (c == '.') { |
| 753 | fraction: |
| 754 | /* Fraction */ |
| 755 | do { |
| 756 | c = tok_nextc(tok); |
| 757 | } while (isdigit(c)); |
| 758 | } |
| 759 | if (c == 'e' || c == 'E') { |
| 760 | /* Exponent part */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 761 | c = tok_nextc(tok); |
Guido van Rossum | f023c46 | 1991-05-05 20:16:20 +0000 | [diff] [blame] | 762 | if (c == '+' || c == '-') |
| 763 | c = tok_nextc(tok); |
| 764 | while (isdigit(c)) { |
| 765 | c = tok_nextc(tok); |
| 766 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 767 | } |
Guido van Rossum | f595fde | 1996-01-12 01:31:58 +0000 | [diff] [blame] | 768 | #ifndef WITHOUT_COMPLEX |
Guido van Rossum | faa436c | 1996-01-26 18:59:07 +0000 | [diff] [blame] | 769 | if (c == 'j' || c == 'J') |
Guido van Rossum | f595fde | 1996-01-12 01:31:58 +0000 | [diff] [blame] | 770 | /* Imaginary part */ |
| 771 | imaginary: |
| 772 | c = tok_nextc(tok); |
| 773 | #endif |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 774 | } |
| 775 | } |
| 776 | tok_backup(tok, c); |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 777 | *p_start = tok->start; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 778 | *p_end = tok->cur; |
| 779 | return NUMBER; |
| 780 | } |
Guido van Rossum | 24dacb3 | 1997-04-06 03:46:20 +0000 | [diff] [blame] | 781 | |
| 782 | letter_quote: |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 783 | /* String */ |
| 784 | if (c == '\'' || c == '"') { |
Guido van Rossum | 3568524 | 1998-02-16 15:42:50 +0000 | [diff] [blame] | 785 | int quote2 = tok->cur - tok->start + 1; |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 786 | int quote = c; |
| 787 | int triple = 0; |
| 788 | int tripcount = 0; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 789 | for (;;) { |
| 790 | c = tok_nextc(tok); |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 791 | if (c == '\n') { |
| 792 | if (!triple) { |
| 793 | tok->done = E_TOKEN; |
| 794 | tok_backup(tok, c); |
| 795 | return ERRORTOKEN; |
| 796 | } |
| 797 | tripcount = 0; |
| 798 | } |
| 799 | else if (c == EOF) { |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 800 | tok->done = E_TOKEN; |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 801 | tok->cur = tok->inp; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 802 | return ERRORTOKEN; |
| 803 | } |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 804 | else if (c == quote) { |
| 805 | tripcount++; |
Guido van Rossum | 3568524 | 1998-02-16 15:42:50 +0000 | [diff] [blame] | 806 | if (tok->cur - tok->start == quote2) { |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 807 | c = tok_nextc(tok); |
| 808 | if (c == quote) { |
| 809 | triple = 1; |
| 810 | tripcount = 0; |
| 811 | continue; |
| 812 | } |
| 813 | tok_backup(tok, c); |
| 814 | } |
| 815 | if (!triple || tripcount == 3) |
| 816 | break; |
| 817 | } |
| 818 | else if (c == '\\') { |
| 819 | tripcount = 0; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 820 | c = tok_nextc(tok); |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 821 | if (c == EOF) { |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 822 | tok->done = E_TOKEN; |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 823 | tok->cur = tok->inp; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 824 | return ERRORTOKEN; |
| 825 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 826 | } |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 827 | else |
| 828 | tripcount = 0; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 829 | } |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 830 | *p_start = tok->start; |
Guido van Rossum | 8054fad | 1993-10-26 15:19:44 +0000 | [diff] [blame] | 831 | *p_end = tok->cur; |
| 832 | return STRING; |
| 833 | } |
| 834 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 835 | /* Line continuation */ |
| 836 | if (c == '\\') { |
| 837 | c = tok_nextc(tok); |
| 838 | if (c != '\n') { |
| 839 | tok->done = E_TOKEN; |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 840 | tok->cur = tok->inp; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 841 | return ERRORTOKEN; |
| 842 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 843 | goto again; /* Read next line */ |
| 844 | } |
| 845 | |
Guido van Rossum | fbab905 | 1991-10-20 20:25:03 +0000 | [diff] [blame] | 846 | /* Check for two-character token */ |
| 847 | { |
| 848 | int c2 = tok_nextc(tok); |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 849 | int token = PyToken_TwoChars(c, c2); |
Guido van Rossum | fbab905 | 1991-10-20 20:25:03 +0000 | [diff] [blame] | 850 | if (token != OP) { |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 851 | int c3 = tok_nextc(tok); |
| 852 | int token3 = PyToken_ThreeChars(c, c2, c3); |
| 853 | if (token3 != OP) { |
| 854 | token = token3; |
| 855 | } else { |
| 856 | tok_backup(tok, c3); |
| 857 | } |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 858 | *p_start = tok->start; |
Guido van Rossum | fbab905 | 1991-10-20 20:25:03 +0000 | [diff] [blame] | 859 | *p_end = tok->cur; |
| 860 | return token; |
| 861 | } |
| 862 | tok_backup(tok, c2); |
| 863 | } |
| 864 | |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 865 | /* Keep track of parentheses nesting level */ |
Guido van Rossum | a849b83 | 1993-05-12 11:35:44 +0000 | [diff] [blame] | 866 | switch (c) { |
| 867 | case '(': |
| 868 | case '[': |
| 869 | case '{': |
| 870 | tok->level++; |
| 871 | break; |
| 872 | case ')': |
| 873 | case ']': |
| 874 | case '}': |
| 875 | tok->level--; |
| 876 | break; |
| 877 | } |
| 878 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 879 | /* Punctuation character */ |
Guido van Rossum | f4b1a64 | 1994-08-29 12:43:07 +0000 | [diff] [blame] | 880 | *p_start = tok->start; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 881 | *p_end = tok->cur; |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 882 | return PyToken_OneChar(c); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 883 | } |
| 884 | |
| 885 | |
Guido van Rossum | 408027e | 1996-12-30 16:17:54 +0000 | [diff] [blame] | 886 | #ifdef Py_DEBUG |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 887 | |
| 888 | void |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 889 | tok_dump(int type, char *start, char *end) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 890 | { |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 891 | printf("%s", _PyParser_TokenNames[type]); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 892 | if (type == NAME || type == NUMBER || type == STRING || type == OP) |
| 893 | printf("(%.*s)", (int)(end - start), start); |
| 894 | } |
| 895 | |
| 896 | #endif |