Mercurial > cpython-lru_cache-weakref
annotate Parser/tokenizer.c @ 4566:6403c94de50d legacy-trunk
Added safeguard against failure in __del__.
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Wed, 27 Nov 1996 19:39:58 +0000 |
| parents | 65d2d8e67da3 |
| children | fae78cf8541d |
| rev | line source |
|---|---|
| 145 | 1 /*********************************************************** |
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2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
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3 The Netherlands. |
| 145 | 4 |
| 5 All Rights Reserved | |
| 6 | |
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7 Permission to use, copy, modify, and distribute this software and its |
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8 documentation for any purpose and without fee is hereby granted, |
| 145 | 9 provided that the above copyright notice appear in all copies and that |
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10 both that copyright notice and this permission notice appear in |
| 145 | 11 supporting documentation, and that the names of Stichting Mathematisch |
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12 Centrum or CWI or Corporation for National Research Initiatives or |
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13 CNRI not be used in advertising or publicity pertaining to |
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14 distribution of the software without specific, written prior |
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15 permission. |
| 145 | 16 |
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17 While CWI is the initial source for this software, a modified version |
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18 is made available by the Corporation for National Research Initiatives |
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19 (CNRI) at the Internet address ftp://ftp.python.org. |
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20 |
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21 STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH |
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22 REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF |
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23 MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH |
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24 CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL |
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25 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
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26 PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
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27 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
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28 PERFORMANCE OF THIS SOFTWARE. |
| 145 | 29 |
| 30 ******************************************************************/ | |
| 31 | |
| 6 | 32 /* Tokenizer implementation */ |
| 33 | |
| 86 | 34 #include "pgenheaders.h" |
| 35 | |
| 6 | 36 #include <ctype.h> |
| 37 | |
| 38 #include "tokenizer.h" | |
| 39 #include "errcode.h" | |
| 40 | |
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41 extern char *my_readline PROTO((char *)); |
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42 /* Return malloc'ed string including trailing \n; |
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43 empty malloc'ed string for EOF; |
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44 NULL if interrupted */ |
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45 |
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46 /* Don't ever change this -- it would break the portability of Python code */ |
| 6 | 47 #define TABSIZE 8 |
| 48 | |
| 86 | 49 /* Forward */ |
| 50 static struct tok_state *tok_new PROTO((void)); | |
| 51 static int tok_nextc PROTO((struct tok_state *tok)); | |
| 52 static void tok_backup PROTO((struct tok_state *tok, int c)); | |
| 53 | |
| 6 | 54 /* Token names */ |
| 55 | |
| 56 char *tok_name[] = { | |
| 57 "ENDMARKER", | |
| 58 "NAME", | |
| 59 "NUMBER", | |
| 60 "STRING", | |
| 61 "NEWLINE", | |
| 62 "INDENT", | |
| 63 "DEDENT", | |
| 64 "LPAR", | |
| 65 "RPAR", | |
| 66 "LSQB", | |
| 67 "RSQB", | |
| 68 "COLON", | |
| 69 "COMMA", | |
| 70 "SEMI", | |
| 71 "PLUS", | |
| 72 "MINUS", | |
| 73 "STAR", | |
| 74 "SLASH", | |
| 75 "VBAR", | |
| 76 "AMPER", | |
| 77 "LESS", | |
| 78 "GREATER", | |
| 79 "EQUAL", | |
| 80 "DOT", | |
| 81 "PERCENT", | |
| 82 "BACKQUOTE", | |
| 83 "LBRACE", | |
| 84 "RBRACE", | |
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85 "EQEQUAL", |
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86 "NOTEQUAL", |
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87 "LESSEQUAL", |
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88 "GREATEREQUAL", |
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89 "TILDE", |
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90 "CIRCUMFLEX", |
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91 "LEFTSHIFT", |
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92 "RIGHTSHIFT", |
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93 "DOUBLESTAR", |
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94 /* This table must match the #defines in token.h! */ |
| 6 | 95 "OP", |
| 96 "<ERRORTOKEN>", | |
| 97 "<N_TOKENS>" | |
| 98 }; | |
| 99 | |
| 100 | |
| 101 /* Create and initialize a new tok_state structure */ | |
| 102 | |
| 103 static struct tok_state * | |
| 104 tok_new() | |
| 105 { | |
| 106 struct tok_state *tok = NEW(struct tok_state, 1); | |
| 107 if (tok == NULL) | |
| 108 return NULL; | |
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109 tok->buf = tok->cur = tok->end = tok->inp = tok->start = NULL; |
| 6 | 110 tok->done = E_OK; |
| 111 tok->fp = NULL; | |
| 112 tok->tabsize = TABSIZE; | |
| 113 tok->indent = 0; | |
| 114 tok->indstack[0] = 0; | |
| 115 tok->atbol = 1; | |
| 116 tok->pendin = 0; | |
| 117 tok->prompt = tok->nextprompt = NULL; | |
| 118 tok->lineno = 0; | |
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119 tok->level = 0; |
| 6 | 120 return tok; |
| 121 } | |
| 122 | |
| 123 | |
| 124 /* Set up tokenizer for string */ | |
| 125 | |
| 126 struct tok_state * | |
| 127 tok_setups(str) | |
| 128 char *str; | |
| 129 { | |
| 130 struct tok_state *tok = tok_new(); | |
| 131 if (tok == NULL) | |
| 132 return NULL; | |
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133 tok->buf = tok->cur = tok->end = tok->inp = str; |
| 6 | 134 return tok; |
| 135 } | |
| 136 | |
| 137 | |
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138 /* Set up tokenizer for file */ |
| 6 | 139 |
| 140 struct tok_state * | |
| 141 tok_setupf(fp, ps1, ps2) | |
| 142 FILE *fp; | |
| 143 char *ps1, *ps2; | |
| 144 { | |
| 145 struct tok_state *tok = tok_new(); | |
| 146 if (tok == NULL) | |
| 147 return NULL; | |
| 148 if ((tok->buf = NEW(char, BUFSIZ)) == NULL) { | |
| 149 DEL(tok); | |
| 150 return NULL; | |
| 151 } | |
| 152 tok->cur = tok->inp = tok->buf; | |
| 153 tok->end = tok->buf + BUFSIZ; | |
| 154 tok->fp = fp; | |
| 155 tok->prompt = ps1; | |
| 156 tok->nextprompt = ps2; | |
| 157 return tok; | |
| 158 } | |
| 159 | |
| 160 | |
| 161 /* Free a tok_state structure */ | |
| 162 | |
| 163 void | |
| 164 tok_free(tok) | |
| 165 struct tok_state *tok; | |
| 166 { | |
| 167 if (tok->fp != NULL && tok->buf != NULL) | |
| 168 DEL(tok->buf); | |
| 169 DEL(tok); | |
| 170 } | |
| 171 | |
| 172 | |
| 173 /* Get next char, updating state; error code goes into tok->done */ | |
| 174 | |
| 175 static int | |
| 176 tok_nextc(tok) | |
| 177 register struct tok_state *tok; | |
| 178 { | |
| 179 for (;;) { | |
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180 if (tok->cur != tok->inp) { |
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181 return *tok->cur++; /* Fast path */ |
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182 } |
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183 if (tok->done != E_OK) |
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184 return EOF; |
| 6 | 185 if (tok->fp == NULL) { |
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186 char *end = strchr(tok->inp, '\n'); |
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187 if (end != NULL) |
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188 end++; |
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189 else { |
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190 end = strchr(tok->inp, '\0'); |
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191 if (end == tok->inp) { |
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192 tok->done = E_EOF; |
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193 return EOF; |
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194 } |
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195 } |
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196 if (tok->start == NULL) |
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197 tok->buf = tok->cur; |
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198 tok->lineno++; |
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199 tok->inp = end; |
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200 return *tok->cur++; |
| 6 | 201 } |
| 202 if (tok->prompt != NULL) { | |
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203 char *new = my_readline(tok->prompt); |
| 6 | 204 if (tok->nextprompt != NULL) |
| 205 tok->prompt = tok->nextprompt; | |
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206 if (new == NULL) |
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207 tok->done = E_INTR; |
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208 else if (*new == '\0') { |
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209 free(new); |
| 6 | 210 tok->done = E_EOF; |
| 211 } | |
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212 else if (tok->start != NULL) { |
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213 int start = tok->start - tok->buf; |
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214 int oldlen = tok->cur - tok->buf; |
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215 int newlen = oldlen + strlen(new); |
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216 char *buf = realloc(tok->buf, newlen+1); |
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217 tok->lineno++; |
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218 if (buf == NULL) { |
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219 free(tok->buf); |
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220 tok->buf = NULL; |
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221 free(new); |
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222 tok->done = E_NOMEM; |
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223 return EOF; |
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224 } |
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225 tok->buf = buf; |
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226 tok->cur = tok->buf + oldlen; |
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227 strcpy(tok->buf + oldlen, new); |
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228 free(new); |
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229 tok->inp = tok->buf + newlen; |
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230 tok->end = tok->inp + 1; |
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231 tok->start = tok->buf + start; |
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232 } |
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233 else { |
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234 tok->lineno++; |
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235 if (tok->buf != NULL) |
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236 free(tok->buf); |
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237 tok->buf = new; |
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238 tok->cur = tok->buf; |
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239 tok->inp = strchr(tok->buf, '\0'); |
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240 tok->end = tok->inp + 1; |
| 6 | 241 } |
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242 } |
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243 else { |
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244 int done = 0; |
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245 int cur = 0; |
|
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246 char *pt; |
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247 if (tok->start == NULL) { |
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248 if (tok->buf == NULL) { |
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249 tok->buf = NEW(char, BUFSIZ); |
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250 if (tok->buf == NULL) { |
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251 tok->done = E_NOMEM; |
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252 return EOF; |
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253 } |
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254 tok->end = tok->buf + BUFSIZ; |
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255 } |
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256 if (fgets(tok->buf, (int)(tok->end - tok->buf), |
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257 tok->fp) == NULL) { |
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258 tok->done = E_EOF; |
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259 done = 1; |
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260 } |
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261 else { |
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262 tok->done = E_OK; |
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263 tok->inp = strchr(tok->buf, '\0'); |
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264 done = tok->inp[-1] == '\n'; |
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265 } |
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266 } |
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267 else { |
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268 cur = tok->cur - tok->buf; |
|
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269 if (feof(tok->fp)) { |
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270 tok->done = E_EOF; |
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271 done = 1; |
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272 } |
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273 else |
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274 tok->done = E_OK; |
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275 } |
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276 tok->lineno++; |
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277 /* Read until '\n' or EOF */ |
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278 while (!done) { |
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279 int curstart = tok->start == NULL ? -1 : |
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280 tok->start - tok->buf; |
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281 int curvalid = tok->inp - tok->buf; |
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282 int cursize = tok->end - tok->buf; |
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283 int newsize = curvalid + BUFSIZ; |
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284 char *newbuf = tok->buf; |
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285 RESIZE(newbuf, char, newsize); |
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286 if (newbuf == NULL) { |
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287 tok->done = E_NOMEM; |
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288 tok->cur = tok->inp; |
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289 return EOF; |
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290 } |
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291 tok->buf = newbuf; |
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292 tok->inp = tok->buf + curvalid; |
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293 tok->end = tok->buf + newsize; |
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294 tok->start = curstart < 0 ? NULL : |
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295 tok->buf + curstart; |
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296 if (fgets(tok->inp, |
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297 (int)(tok->end - tok->inp), |
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298 tok->fp) == NULL) { |
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299 /* Last line does not end in \n, |
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300 fake one */ |
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301 strcpy(tok->inp, "\n"); |
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302 } |
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303 tok->inp = strchr(tok->inp, '\0'); |
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304 done = tok->inp[-1] == '\n'; |
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305 } |
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306 tok->cur = tok->buf + cur; |
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307 /* replace "\r\n" with "\n" */ |
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308 pt = tok->inp - 2; |
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309 if (pt >= tok->buf && *pt == '\r') { |
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310 *pt++ = '\n'; |
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311 *pt = '\0'; |
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312 tok->inp = pt; |
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313 } |
| 6 | 314 } |
| 315 if (tok->done != E_OK) { | |
| 316 if (tok->prompt != NULL) | |
| 317 fprintf(stderr, "\n"); | |
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318 tok->cur = tok->inp; |
| 6 | 319 return EOF; |
| 320 } | |
| 321 } | |
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322 /*NOTREACHED*/ |
| 6 | 323 } |
| 324 | |
| 325 | |
| 326 /* Back-up one character */ | |
| 327 | |
| 328 static void | |
| 329 tok_backup(tok, c) | |
| 330 register struct tok_state *tok; | |
| 331 register int c; | |
| 332 { | |
| 333 if (c != EOF) { | |
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334 if (--tok->cur < tok->buf) |
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335 fatal("tok_backup: begin of buffer"); |
| 6 | 336 if (*tok->cur != c) |
| 337 *tok->cur = c; | |
| 338 } | |
| 339 } | |
| 340 | |
| 341 | |
| 342 /* Return the token corresponding to a single character */ | |
| 343 | |
| 344 int | |
| 345 tok_1char(c) | |
| 346 int c; | |
| 347 { | |
| 348 switch (c) { | |
| 349 case '(': return LPAR; | |
| 350 case ')': return RPAR; | |
| 351 case '[': return LSQB; | |
| 352 case ']': return RSQB; | |
| 353 case ':': return COLON; | |
| 354 case ',': return COMMA; | |
| 355 case ';': return SEMI; | |
| 356 case '+': return PLUS; | |
| 357 case '-': return MINUS; | |
| 358 case '*': return STAR; | |
| 359 case '/': return SLASH; | |
| 360 case '|': return VBAR; | |
| 361 case '&': return AMPER; | |
| 362 case '<': return LESS; | |
| 363 case '>': return GREATER; | |
| 364 case '=': return EQUAL; | |
| 365 case '.': return DOT; | |
| 366 case '%': return PERCENT; | |
| 367 case '`': return BACKQUOTE; | |
| 368 case '{': return LBRACE; | |
| 369 case '}': return RBRACE; | |
|
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370 case '^': return CIRCUMFLEX; |
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371 case '~': return TILDE; |
| 6 | 372 default: return OP; |
| 373 } | |
| 374 } | |
| 375 | |
| 376 | |
|
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377 int |
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378 tok_2char(c1, c2) |
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379 int c1, c2; |
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380 { |
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381 switch (c1) { |
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382 case '=': |
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383 switch (c2) { |
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384 case '=': return EQEQUAL; |
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385 } |
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386 break; |
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387 case '!': |
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388 switch (c2) { |
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389 case '=': return NOTEQUAL; |
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390 } |
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391 break; |
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392 case '<': |
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393 switch (c2) { |
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394 case '>': return NOTEQUAL; |
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395 case '=': return LESSEQUAL; |
|
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396 case '<': return LEFTSHIFT; |
|
400
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397 } |
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398 break; |
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399 case '>': |
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400 switch (c2) { |
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401 case '=': return GREATEREQUAL; |
|
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402 case '>': return RIGHTSHIFT; |
|
400
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403 } |
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404 break; |
|
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405 case '*': |
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406 switch (c2) { |
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407 case '*': return DOUBLESTAR; |
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408 } |
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409 break; |
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400
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410 } |
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411 return OP; |
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412 } |
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413 |
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414 |
| 6 | 415 /* Get next token, after space stripping etc. */ |
| 416 | |
| 417 int | |
| 418 tok_get(tok, p_start, p_end) | |
| 419 register struct tok_state *tok; /* In/out: tokenizer state */ | |
| 420 char **p_start, **p_end; /* Out: point to start/end of token */ | |
| 421 { | |
| 422 register int c; | |
|
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423 int blankline; |
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424 |
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425 *p_start = *p_end = NULL; |
|
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426 nextline: |
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427 tok->start = NULL; |
|
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428 blankline = 0; |
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429 |
| 6 | 430 /* Get indentation level */ |
| 431 if (tok->atbol) { | |
| 432 register int col = 0; | |
| 433 tok->atbol = 0; | |
| 434 for (;;) { | |
| 435 c = tok_nextc(tok); | |
| 436 if (c == ' ') | |
| 437 col++; | |
| 438 else if (c == '\t') | |
| 439 col = (col/tok->tabsize + 1) * tok->tabsize; | |
|
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440 else if (c == '\014') /* Control-L (formfeed) */ |
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441 col = 0; /* For Emacs users */ |
| 6 | 442 else |
| 443 break; | |
| 444 } | |
| 445 tok_backup(tok, c); | |
|
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446 if (c == '#' || c == '\n') { |
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447 /* Lines with only whitespace and/or comments |
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448 shouldn't affect the indentation and are |
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449 not passed to the parser as NEWLINE tokens, |
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450 except *totally* empty lines in interactive |
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451 mode, which signal the end of a command group. */ |
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452 if (col == 0 && c == '\n' && tok->prompt != NULL) |
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453 blankline = 0; /* Let it through */ |
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454 else |
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455 blankline = 1; /* Ignore completely */ |
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456 /* We can't jump back right here since we still |
|
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457 may need to skip to the end of a comment */ |
| 6 | 458 } |
|
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459 if (!blankline && tok->level == 0) { |
|
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460 if (col == tok->indstack[tok->indent]) { |
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461 /* No change */ |
| 6 | 462 } |
|
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463 else if (col > tok->indstack[tok->indent]) { |
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464 /* Indent -- always one */ |
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465 if (tok->indent+1 >= MAXINDENT) { |
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466 fprintf(stderr, "excessive indent\n"); |
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467 tok->done = E_TOKEN; |
|
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468 tok->cur = tok->inp; |
|
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469 return ERRORTOKEN; |
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470 } |
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471 tok->pendin++; |
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472 tok->indstack[++tok->indent] = col; |
| 6 | 473 } |
|
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474 else /* col < tok->indstack[tok->indent] */ { |
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475 /* Dedent -- any number, must be consistent */ |
|
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476 while (tok->indent > 0 && |
|
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477 col < tok->indstack[tok->indent]) { |
|
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478 tok->indent--; |
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479 tok->pendin--; |
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480 } |
|
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481 if (col != tok->indstack[tok->indent]) { |
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482 fprintf(stderr, "inconsistent dedent\n"); |
|
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483 tok->done = E_TOKEN; |
|
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484 tok->cur = tok->inp; |
|
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485 return ERRORTOKEN; |
|
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486 } |
| 6 | 487 } |
| 488 } | |
| 489 } | |
| 490 | |
|
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|
491 tok->start = tok->cur; |
| 6 | 492 |
| 493 /* Return pending indents/dedents */ | |
| 494 if (tok->pendin != 0) { | |
| 495 if (tok->pendin < 0) { | |
| 496 tok->pendin++; | |
| 497 return DEDENT; | |
| 498 } | |
| 499 else { | |
| 500 tok->pendin--; | |
| 501 return INDENT; | |
| 502 } | |
| 503 } | |
| 504 | |
| 505 again: | |
|
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506 tok->start = NULL; |
| 6 | 507 /* Skip spaces */ |
| 508 do { | |
| 509 c = tok_nextc(tok); | |
|
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510 } while (c == ' ' || c == '\t' || c == '\014'); |
| 6 | 511 |
| 512 /* Set start of current token */ | |
|
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513 tok->start = tok->cur - 1; |
| 6 | 514 |
| 515 /* Skip comment */ | |
| 516 if (c == '#') { | |
| 517 /* Hack to allow overriding the tabsize in the file. | |
| 518 This is also recognized by vi, when it occurs near the | |
|
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|
519 beginning or end of the file. (Will vi never die...?) |
|
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|
520 For Python it must be at the beginning of the file! */ |
|
1897
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521 /* XXX The real vi syntax is actually different :-( */ |
|
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522 /* XXX Should recognize Emacs syntax, too */ |
| 6 | 523 int x; |
|
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524 if (sscanf(tok->cur, |
| 86 | 525 " vi:set tabsize=%d:", &x) == 1 && |
| 6 | 526 x >= 1 && x <= 40) { |
|
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|
527 /* fprintf(stderr, "# vi:set tabsize=%d:\n", x); */ |
| 6 | 528 tok->tabsize = x; |
| 529 } | |
| 530 do { | |
| 531 c = tok_nextc(tok); | |
| 532 } while (c != EOF && c != '\n'); | |
| 533 } | |
| 534 | |
| 535 /* Check for EOF and errors now */ | |
|
410
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|
536 if (c == EOF) { |
| 6 | 537 return tok->done == E_EOF ? ENDMARKER : ERRORTOKEN; |
|
410
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|
538 } |
| 6 | 539 |
| 540 /* Identifier (most frequent token!) */ | |
| 541 if (isalpha(c) || c == '_') { | |
| 542 do { | |
| 543 c = tok_nextc(tok); | |
| 544 } while (isalnum(c) || c == '_'); | |
| 545 tok_backup(tok, c); | |
|
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|
546 *p_start = tok->start; |
| 6 | 547 *p_end = tok->cur; |
| 548 return NAME; | |
| 549 } | |
| 550 | |
| 551 /* Newline */ | |
| 552 if (c == '\n') { | |
| 553 tok->atbol = 1; | |
|
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554 if (blankline || tok->level > 0) |
|
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555 goto nextline; |
|
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|
556 *p_start = tok->start; |
| 6 | 557 *p_end = tok->cur - 1; /* Leave '\n' out of the string */ |
| 558 return NEWLINE; | |
| 559 } | |
| 560 | |
|
410
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|
561 /* Period or number starting with period? */ |
|
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|
562 if (c == '.') { |
|
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|
563 c = tok_nextc(tok); |
|
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|
564 if (isdigit(c)) { |
|
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|
565 goto fraction; |
|
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|
566 } |
|
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|
567 else { |
|
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|
568 tok_backup(tok, c); |
|
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569 *p_start = tok->start; |
|
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|
570 *p_end = tok->cur; |
|
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|
571 return DOT; |
|
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changeset
|
572 } |
|
fd061dae9e57
Added shift and mask ops.
Guido van Rossum <guido@python.org>
parents:
400
diff
changeset
|
573 } |
|
3333
4b5bff95804e
changes for pow(**) and complex
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parents:
3116
diff
changeset
|
574 |
| 6 | 575 /* Number */ |
| 576 if (isdigit(c)) { | |
| 577 if (c == '0') { | |
| 578 /* Hex or octal */ | |
| 579 c = tok_nextc(tok); | |
| 580 if (c == '.') | |
| 581 goto fraction; | |
|
3333
4b5bff95804e
changes for pow(**) and complex
Guido van Rossum <guido@python.org>
parents:
3116
diff
changeset
|
582 #ifndef WITHOUT_COMPLEX |
|
3364
bc17e8313ea0
use only j for imaginary constants
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3333
diff
changeset
|
583 if (c == 'j' || c == 'J') |
|
3333
4b5bff95804e
changes for pow(**) and complex
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
584 goto imaginary; |
|
4b5bff95804e
changes for pow(**) and complex
Guido van Rossum <guido@python.org>
parents:
3116
diff
changeset
|
585 #endif |
| 6 | 586 if (c == 'x' || c == 'X') { |
| 587 /* Hex */ | |
| 588 do { | |
| 589 c = tok_nextc(tok); | |
| 590 } while (isxdigit(c)); | |
| 591 } | |
| 592 else { | |
|
477
436c81030853
Add warning XXX that 09.9 isn't accepted.
Guido van Rossum <guido@python.org>
parents:
410
diff
changeset
|
593 /* XXX This is broken! E.g., |
|
436c81030853
Add warning XXX that 09.9 isn't accepted.
Guido van Rossum <guido@python.org>
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410
diff
changeset
|
594 09.9 should be accepted as float! */ |
| 6 | 595 /* Octal; c is first char of it */ |
| 596 /* There's no 'isoctdigit' macro, sigh */ | |
| 597 while ('0' <= c && c < '8') { | |
| 598 c = tok_nextc(tok); | |
| 599 } | |
| 600 } | |
|
236
0a92b6a1b9c0
Added recognition of 'l' or 'L' as long integer suffix
Guido van Rossum <guido@python.org>
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145
diff
changeset
|
601 if (c == 'l' || c == 'L') |
|
0a92b6a1b9c0
Added recognition of 'l' or 'L' as long integer suffix
Guido van Rossum <guido@python.org>
parents:
145
diff
changeset
|
602 c = tok_nextc(tok); |
| 6 | 603 } |
| 604 else { | |
| 605 /* Decimal */ | |
| 606 do { | |
| 607 c = tok_nextc(tok); | |
| 608 } while (isdigit(c)); | |
|
236
0a92b6a1b9c0
Added recognition of 'l' or 'L' as long integer suffix
Guido van Rossum <guido@python.org>
parents:
145
diff
changeset
|
609 if (c == 'l' || c == 'L') |
|
0a92b6a1b9c0
Added recognition of 'l' or 'L' as long integer suffix
Guido van Rossum <guido@python.org>
parents:
145
diff
changeset
|
610 c = tok_nextc(tok); |
|
0a92b6a1b9c0
Added recognition of 'l' or 'L' as long integer suffix
Guido van Rossum <guido@python.org>
parents:
145
diff
changeset
|
611 else { |
|
0a92b6a1b9c0
Added recognition of 'l' or 'L' as long integer suffix
Guido van Rossum <guido@python.org>
parents:
145
diff
changeset
|
612 /* Accept floating point numbers. |
|
0a92b6a1b9c0
Added recognition of 'l' or 'L' as long integer suffix
Guido van Rossum <guido@python.org>
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145
diff
changeset
|
613 XXX This accepts incomplete things like |
|
1835
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* Parser/tokenizer.c: backup over illegal newline in string
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parents:
1364
diff
changeset
|
614 XXX 12e or 1e+; worry run-time */ |
|
236
0a92b6a1b9c0
Added recognition of 'l' or 'L' as long integer suffix
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parents:
145
diff
changeset
|
615 if (c == '.') { |
|
0a92b6a1b9c0
Added recognition of 'l' or 'L' as long integer suffix
Guido van Rossum <guido@python.org>
parents:
145
diff
changeset
|
616 fraction: |
|
0a92b6a1b9c0
Added recognition of 'l' or 'L' as long integer suffix
Guido van Rossum <guido@python.org>
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diff
changeset
|
617 /* Fraction */ |
|
0a92b6a1b9c0
Added recognition of 'l' or 'L' as long integer suffix
Guido van Rossum <guido@python.org>
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145
diff
changeset
|
618 do { |
|
0a92b6a1b9c0
Added recognition of 'l' or 'L' as long integer suffix
Guido van Rossum <guido@python.org>
parents:
145
diff
changeset
|
619 c = tok_nextc(tok); |
|
0a92b6a1b9c0
Added recognition of 'l' or 'L' as long integer suffix
Guido van Rossum <guido@python.org>
parents:
145
diff
changeset
|
620 } while (isdigit(c)); |
|
0a92b6a1b9c0
Added recognition of 'l' or 'L' as long integer suffix
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145
diff
changeset
|
621 } |
|
0a92b6a1b9c0
Added recognition of 'l' or 'L' as long integer suffix
Guido van Rossum <guido@python.org>
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145
diff
changeset
|
622 if (c == 'e' || c == 'E') { |
|
0a92b6a1b9c0
Added recognition of 'l' or 'L' as long integer suffix
Guido van Rossum <guido@python.org>
parents:
145
diff
changeset
|
623 /* Exponent part */ |
| 6 | 624 c = tok_nextc(tok); |
|
236
0a92b6a1b9c0
Added recognition of 'l' or 'L' as long integer suffix
Guido van Rossum <guido@python.org>
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diff
changeset
|
625 if (c == '+' || c == '-') |
|
0a92b6a1b9c0
Added recognition of 'l' or 'L' as long integer suffix
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parents:
145
diff
changeset
|
626 c = tok_nextc(tok); |
|
0a92b6a1b9c0
Added recognition of 'l' or 'L' as long integer suffix
Guido van Rossum <guido@python.org>
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diff
changeset
|
627 while (isdigit(c)) { |
|
0a92b6a1b9c0
Added recognition of 'l' or 'L' as long integer suffix
Guido van Rossum <guido@python.org>
parents:
145
diff
changeset
|
628 c = tok_nextc(tok); |
|
0a92b6a1b9c0
Added recognition of 'l' or 'L' as long integer suffix
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diff
changeset
|
629 } |
| 6 | 630 } |
|
3333
4b5bff95804e
changes for pow(**) and complex
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diff
changeset
|
631 #ifndef WITHOUT_COMPLEX |
|
3364
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use only j for imaginary constants
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parents:
3333
diff
changeset
|
632 if (c == 'j' || c == 'J') |
|
3333
4b5bff95804e
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diff
changeset
|
633 /* Imaginary part */ |
|
4b5bff95804e
changes for pow(**) and complex
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diff
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|
634 imaginary: |
|
4b5bff95804e
changes for pow(**) and complex
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diff
changeset
|
635 c = tok_nextc(tok); |
|
4b5bff95804e
changes for pow(**) and complex
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
636 #endif |
| 6 | 637 } |
| 638 } | |
| 639 tok_backup(tok, c); | |
|
1835
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
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diff
changeset
|
640 *p_start = tok->start; |
| 6 | 641 *p_end = tok->cur; |
| 642 return NUMBER; | |
| 643 } | |
| 644 | |
|
1835
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
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diff
changeset
|
645 /* String */ |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
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diff
changeset
|
646 if (c == '\'' || c == '"') { |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
647 int quote = c; |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
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diff
changeset
|
648 int triple = 0; |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
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parents:
1364
diff
changeset
|
649 int tripcount = 0; |
| 6 | 650 for (;;) { |
| 651 c = tok_nextc(tok); | |
|
1835
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
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diff
changeset
|
652 if (c == '\n') { |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
653 if (!triple) { |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
1364
diff
changeset
|
654 tok->done = E_TOKEN; |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
655 tok_backup(tok, c); |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
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diff
changeset
|
656 return ERRORTOKEN; |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
1364
diff
changeset
|
657 } |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
658 tripcount = 0; |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
659 } |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
1364
diff
changeset
|
660 else if (c == EOF) { |
| 6 | 661 tok->done = E_TOKEN; |
|
1282
e0464e7115ca
* pythonrun.c: Print exception type+arg *after* stack trace instead of
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
662 tok->cur = tok->inp; |
| 6 | 663 return ERRORTOKEN; |
| 664 } | |
|
1835
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
1364
diff
changeset
|
665 else if (c == quote) { |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
666 tripcount++; |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
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diff
changeset
|
667 if (tok->cur == tok->start+2) { |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
668 c = tok_nextc(tok); |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
669 if (c == quote) { |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
670 triple = 1; |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
671 tripcount = 0; |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
672 continue; |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
673 } |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
674 tok_backup(tok, c); |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
675 } |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
676 if (!triple || tripcount == 3) |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
677 break; |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
678 } |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
679 else if (c == '\\') { |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
1364
diff
changeset
|
680 tripcount = 0; |
| 6 | 681 c = tok_nextc(tok); |
|
1835
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
1364
diff
changeset
|
682 if (c == EOF) { |
| 6 | 683 tok->done = E_TOKEN; |
|
1282
e0464e7115ca
* pythonrun.c: Print exception type+arg *after* stack trace instead of
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
684 tok->cur = tok->inp; |
| 6 | 685 return ERRORTOKEN; |
| 686 } | |
| 687 } | |
|
1835
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
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diff
changeset
|
688 else |
|
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
1364
diff
changeset
|
689 tripcount = 0; |
| 6 | 690 } |
|
1835
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
1364
diff
changeset
|
691 *p_start = tok->start; |
|
1364
132602d854d8
Changes to accept double-quoted strings on input.
Guido van Rossum <guido@python.org>
parents:
1284
diff
changeset
|
692 *p_end = tok->cur; |
|
132602d854d8
Changes to accept double-quoted strings on input.
Guido van Rossum <guido@python.org>
parents:
1284
diff
changeset
|
693 return STRING; |
|
132602d854d8
Changes to accept double-quoted strings on input.
Guido van Rossum <guido@python.org>
parents:
1284
diff
changeset
|
694 } |
|
132602d854d8
Changes to accept double-quoted strings on input.
Guido van Rossum <guido@python.org>
parents:
1284
diff
changeset
|
695 |
| 6 | 696 /* Line continuation */ |
| 697 if (c == '\\') { | |
| 698 c = tok_nextc(tok); | |
| 699 if (c != '\n') { | |
| 700 tok->done = E_TOKEN; | |
|
1282
e0464e7115ca
* pythonrun.c: Print exception type+arg *after* stack trace instead of
Guido van Rossum <guido@python.org>
parents:
1257
diff
changeset
|
701 tok->cur = tok->inp; |
| 6 | 702 return ERRORTOKEN; |
| 703 } | |
| 704 goto again; /* Read next line */ | |
| 705 } | |
| 706 | |
|
400
d189a2f681a6
Added 2-char tokens and new versions of comparisons
Guido van Rossum <guido@python.org>
parents:
326
diff
changeset
|
707 /* Check for two-character token */ |
|
d189a2f681a6
Added 2-char tokens and new versions of comparisons
Guido van Rossum <guido@python.org>
parents:
326
diff
changeset
|
708 { |
|
d189a2f681a6
Added 2-char tokens and new versions of comparisons
Guido van Rossum <guido@python.org>
parents:
326
diff
changeset
|
709 int c2 = tok_nextc(tok); |
|
d189a2f681a6
Added 2-char tokens and new versions of comparisons
Guido van Rossum <guido@python.org>
parents:
326
diff
changeset
|
710 int token = tok_2char(c, c2); |
|
d189a2f681a6
Added 2-char tokens and new versions of comparisons
Guido van Rossum <guido@python.org>
parents:
326
diff
changeset
|
711 if (token != OP) { |
|
1835
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
1364
diff
changeset
|
712 *p_start = tok->start; |
|
400
d189a2f681a6
Added 2-char tokens and new versions of comparisons
Guido van Rossum <guido@python.org>
parents:
326
diff
changeset
|
713 *p_end = tok->cur; |
|
d189a2f681a6
Added 2-char tokens and new versions of comparisons
Guido van Rossum <guido@python.org>
parents:
326
diff
changeset
|
714 return token; |
|
d189a2f681a6
Added 2-char tokens and new versions of comparisons
Guido van Rossum <guido@python.org>
parents:
326
diff
changeset
|
715 } |
|
d189a2f681a6
Added 2-char tokens and new versions of comparisons
Guido van Rossum <guido@python.org>
parents:
326
diff
changeset
|
716 tok_backup(tok, c2); |
|
d189a2f681a6
Added 2-char tokens and new versions of comparisons
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
717 } |
|
d189a2f681a6
Added 2-char tokens and new versions of comparisons
Guido van Rossum <guido@python.org>
parents:
326
diff
changeset
|
718 |
|
1835
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
719 /* Keep track of parentheses nesting level */ |
|
1284
dbce72afe261
* selectmodule.c: fix (another!) two memory leaks -- this time in list2set
Guido van Rossum <guido@python.org>
parents:
1282
diff
changeset
|
720 switch (c) { |
|
dbce72afe261
* selectmodule.c: fix (another!) two memory leaks -- this time in list2set
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
721 case '(': |
|
dbce72afe261
* selectmodule.c: fix (another!) two memory leaks -- this time in list2set
Guido van Rossum <guido@python.org>
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diff
changeset
|
722 case '[': |
|
dbce72afe261
* selectmodule.c: fix (another!) two memory leaks -- this time in list2set
Guido van Rossum <guido@python.org>
parents:
1282
diff
changeset
|
723 case '{': |
|
dbce72afe261
* selectmodule.c: fix (another!) two memory leaks -- this time in list2set
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
724 tok->level++; |
|
dbce72afe261
* selectmodule.c: fix (another!) two memory leaks -- this time in list2set
Guido van Rossum <guido@python.org>
parents:
1282
diff
changeset
|
725 break; |
|
dbce72afe261
* selectmodule.c: fix (another!) two memory leaks -- this time in list2set
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
726 case ')': |
|
dbce72afe261
* selectmodule.c: fix (another!) two memory leaks -- this time in list2set
Guido van Rossum <guido@python.org>
parents:
1282
diff
changeset
|
727 case ']': |
|
dbce72afe261
* selectmodule.c: fix (another!) two memory leaks -- this time in list2set
Guido van Rossum <guido@python.org>
parents:
1282
diff
changeset
|
728 case '}': |
|
dbce72afe261
* selectmodule.c: fix (another!) two memory leaks -- this time in list2set
Guido van Rossum <guido@python.org>
parents:
1282
diff
changeset
|
729 tok->level--; |
|
dbce72afe261
* selectmodule.c: fix (another!) two memory leaks -- this time in list2set
Guido van Rossum <guido@python.org>
parents:
1282
diff
changeset
|
730 break; |
|
dbce72afe261
* selectmodule.c: fix (another!) two memory leaks -- this time in list2set
Guido van Rossum <guido@python.org>
parents:
1282
diff
changeset
|
731 } |
|
dbce72afe261
* selectmodule.c: fix (another!) two memory leaks -- this time in list2set
Guido van Rossum <guido@python.org>
parents:
1282
diff
changeset
|
732 |
| 6 | 733 /* Punctuation character */ |
|
1835
d799889c01e3
* Parser/tokenizer.c: backup over illegal newline in string
Guido van Rossum <guido@python.org>
parents:
1364
diff
changeset
|
734 *p_start = tok->start; |
| 6 | 735 *p_end = tok->cur; |
| 736 return tok_1char(c); | |
| 737 } | |
| 738 | |
| 739 | |
| 740 #ifdef DEBUG | |
| 741 | |
| 742 void | |
| 743 tok_dump(type, start, end) | |
| 744 int type; | |
| 745 char *start, *end; | |
| 746 { | |
| 747 printf("%s", tok_name[type]); | |
| 748 if (type == NAME || type == NUMBER || type == STRING || type == OP) | |
| 749 printf("(%.*s)", (int)(end - start), start); | |
| 750 } | |
| 751 | |
| 752 #endif |