Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 1 | /*********************************************************** |
Guido van Rossum | bab9d03 | 1992-04-05 14:26:55 +0000 | [diff] [blame] | 2 | Copyright 1991, 1992 by Stichting Mathematisch Centrum, Amsterdam, The |
Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 3 | Netherlands. |
| 4 | |
| 5 | All Rights Reserved |
| 6 | |
| 7 | Permission to use, copy, modify, and distribute this software and its |
| 8 | documentation for any purpose and without fee is hereby granted, |
| 9 | provided that the above copyright notice appear in all copies and that |
| 10 | both that copyright notice and this permission notice appear in |
| 11 | supporting documentation, and that the names of Stichting Mathematisch |
| 12 | Centrum or CWI not be used in advertising or publicity pertaining to |
| 13 | distribution of the software without specific, written prior permission. |
| 14 | |
| 15 | STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO |
| 16 | THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| 17 | FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE |
| 18 | FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 19 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 20 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT |
| 21 | OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 22 | |
| 23 | ******************************************************************/ |
| 24 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 25 | /* File object implementation */ |
| 26 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 27 | #include "allobjects.h" |
Guido van Rossum | fa3da8a | 1992-01-27 16:53:23 +0000 | [diff] [blame] | 28 | #include "modsupport.h" |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 29 | |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 30 | #define BUF(v) GETSTRINGVALUE((stringobject *)v) |
| 31 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 32 | #include "errno.h" |
| 33 | #ifndef errno |
| 34 | extern int errno; |
| 35 | #endif |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 36 | |
| 37 | typedef struct { |
| 38 | OB_HEAD |
| 39 | FILE *f_fp; |
| 40 | object *f_name; |
| 41 | object *f_mode; |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 42 | int (*f_close) PROTO((FILE *)); |
Guido van Rossum | eb183da | 1991-04-04 10:44:06 +0000 | [diff] [blame] | 43 | int f_softspace; /* Flag used by 'print' command */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 44 | } fileobject; |
| 45 | |
| 46 | FILE * |
| 47 | getfilefile(f) |
| 48 | object *f; |
| 49 | { |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 50 | if (!is_fileobject(f) || ((fileobject *)f)->f_fp == NULL) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 51 | err_badcall(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 52 | return NULL; |
| 53 | } |
| 54 | return ((fileobject *)f)->f_fp; |
| 55 | } |
| 56 | |
| 57 | object * |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 58 | newopenfileobject(fp, name, mode, close) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 59 | FILE *fp; |
| 60 | char *name; |
| 61 | char *mode; |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 62 | int (*close) FPROTO((FILE *)); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 63 | { |
| 64 | fileobject *f = NEWOBJ(fileobject, &Filetype); |
| 65 | if (f == NULL) |
| 66 | return NULL; |
| 67 | f->f_fp = NULL; |
| 68 | f->f_name = newstringobject(name); |
| 69 | f->f_mode = newstringobject(mode); |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 70 | f->f_close = close; |
Guido van Rossum | eb183da | 1991-04-04 10:44:06 +0000 | [diff] [blame] | 71 | f->f_softspace = 0; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 72 | if (f->f_name == NULL || f->f_mode == NULL) { |
| 73 | DECREF(f); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 74 | return NULL; |
| 75 | } |
| 76 | f->f_fp = fp; |
| 77 | return (object *) f; |
| 78 | } |
| 79 | |
| 80 | object * |
| 81 | newfileobject(name, mode) |
| 82 | char *name, *mode; |
| 83 | { |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 84 | extern int fclose PROTO((FILE *)); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 85 | fileobject *f; |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 86 | f = (fileobject *) newopenfileobject((FILE *)NULL, name, mode, fclose); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 87 | if (f == NULL) |
| 88 | return NULL; |
Guido van Rossum | a08095a | 1991-02-13 23:25:27 +0000 | [diff] [blame] | 89 | #ifdef THINK_C |
| 90 | if (*mode == '*') { |
| 91 | FILE *fopenRF(); |
| 92 | f->f_fp = fopenRF(name, mode+1); |
| 93 | } |
| 94 | else |
| 95 | #endif |
| 96 | f->f_fp = fopen(name, mode); |
| 97 | if (f->f_fp == NULL) { |
Guido van Rossum | 87e7ea7 | 1991-12-10 14:00:03 +0000 | [diff] [blame] | 98 | err_errno(IOError); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 99 | DECREF(f); |
| 100 | return NULL; |
| 101 | } |
| 102 | return (object *)f; |
| 103 | } |
| 104 | |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 105 | static object * |
| 106 | err_closed() |
| 107 | { |
| 108 | err_setstr(ValueError, "I/O operation on closed file"); |
| 109 | return NULL; |
| 110 | } |
| 111 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 112 | /* Methods */ |
| 113 | |
| 114 | static void |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 115 | file_dealloc(f) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 116 | fileobject *f; |
| 117 | { |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 118 | if (f->f_fp != NULL && f->f_close != NULL) |
| 119 | (*f->f_close)(f->f_fp); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 120 | if (f->f_name != NULL) |
| 121 | DECREF(f->f_name); |
| 122 | if (f->f_mode != NULL) |
| 123 | DECREF(f->f_mode); |
| 124 | free((char *)f); |
| 125 | } |
| 126 | |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 127 | static int |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 128 | file_print(f, fp, flags) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 129 | fileobject *f; |
| 130 | FILE *fp; |
| 131 | int flags; |
| 132 | { |
| 133 | fprintf(fp, "<%s file ", f->f_fp == NULL ? "closed" : "open"); |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 134 | if (printobject(f->f_name, fp, flags) != 0) |
| 135 | return -1; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 136 | fprintf(fp, ", mode "); |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 137 | if (printobject(f->f_mode, fp, flags) != 0) |
| 138 | return -1; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 139 | fprintf(fp, ">"); |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 140 | return 0; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 141 | } |
| 142 | |
| 143 | static object * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 144 | file_repr(f) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 145 | fileobject *f; |
| 146 | { |
| 147 | char buf[300]; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 148 | /* XXX This differs from file_print if the filename contains |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 149 | quotes or other funny characters. */ |
| 150 | sprintf(buf, "<%s file '%.256s', mode '%.10s'>", |
| 151 | f->f_fp == NULL ? "closed" : "open", |
| 152 | getstringvalue(f->f_name), |
| 153 | getstringvalue(f->f_mode)); |
| 154 | return newstringobject(buf); |
| 155 | } |
| 156 | |
| 157 | static object * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 158 | file_close(f, args) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 159 | fileobject *f; |
| 160 | object *args; |
| 161 | { |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 162 | int sts = 0; |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 163 | if (!getnoarg(args)) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 164 | return NULL; |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 165 | errno = 0; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 166 | if (f->f_fp != NULL) { |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 167 | if (f->f_close != NULL) |
| 168 | sts = (*f->f_close)(f->f_fp); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 169 | f->f_fp = NULL; |
| 170 | } |
Guido van Rossum | febd551 | 1992-03-04 16:39:24 +0000 | [diff] [blame] | 171 | if (sts == EOF) |
Guido van Rossum | 87e7ea7 | 1991-12-10 14:00:03 +0000 | [diff] [blame] | 172 | return err_errno(IOError); |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 173 | if (sts != 0) |
| 174 | return newintobject((long)sts); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 175 | INCREF(None); |
| 176 | return None; |
| 177 | } |
| 178 | |
| 179 | static object * |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 180 | file_seek(f, args) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 181 | fileobject *f; |
| 182 | object *args; |
| 183 | { |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 184 | long offset; |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 185 | int whence; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 186 | |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 187 | if (f->f_fp == NULL) |
| 188 | return err_closed(); |
| 189 | whence = 0; |
| 190 | if (!getargs(args, "l", &offset)) { |
| 191 | err_clear(); |
| 192 | if (!getargs(args, "(li)", &offset, &whence)) |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 193 | return NULL; |
| 194 | } |
| 195 | errno = 0; |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 196 | if (fseek(f->f_fp, offset, whence) != 0) { |
Guido van Rossum | febd551 | 1992-03-04 16:39:24 +0000 | [diff] [blame] | 197 | err_errno(IOError); |
| 198 | clearerr(f->f_fp); |
| 199 | return NULL; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 200 | } |
| 201 | INCREF(None); |
| 202 | return None; |
| 203 | } |
| 204 | |
| 205 | static object * |
| 206 | file_tell(f, args) |
| 207 | fileobject *f; |
| 208 | object *args; |
| 209 | { |
| 210 | long offset; |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 211 | if (f->f_fp == NULL) |
| 212 | return err_closed(); |
| 213 | if (!getnoarg(args)) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 214 | return NULL; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 215 | errno = 0; |
| 216 | offset = ftell(f->f_fp); |
| 217 | if (offset == -1L) { |
Guido van Rossum | febd551 | 1992-03-04 16:39:24 +0000 | [diff] [blame] | 218 | err_errno(IOError); |
| 219 | clearerr(f->f_fp); |
| 220 | return NULL; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 221 | } |
| 222 | return newintobject(offset); |
| 223 | } |
| 224 | |
| 225 | static object * |
Guido van Rossum | ed233a5 | 1992-06-23 09:07:03 +0000 | [diff] [blame] | 226 | file_fileno(f, args) |
| 227 | fileobject *f; |
| 228 | object *args; |
| 229 | { |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 230 | if (f->f_fp == NULL) |
| 231 | return err_closed(); |
Guido van Rossum | ed233a5 | 1992-06-23 09:07:03 +0000 | [diff] [blame] | 232 | if (!getnoarg(args)) |
| 233 | return NULL; |
| 234 | return newintobject((long) fileno(f->f_fp)); |
| 235 | } |
| 236 | |
| 237 | static object * |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 238 | file_flush(f, args) |
| 239 | fileobject *f; |
| 240 | object *args; |
| 241 | { |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 242 | if (f->f_fp == NULL) |
| 243 | return err_closed(); |
| 244 | if (!getnoarg(args)) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 245 | return NULL; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 246 | errno = 0; |
| 247 | if (fflush(f->f_fp) != 0) { |
Guido van Rossum | febd551 | 1992-03-04 16:39:24 +0000 | [diff] [blame] | 248 | err_errno(IOError); |
| 249 | clearerr(f->f_fp); |
| 250 | return NULL; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 251 | } |
| 252 | INCREF(None); |
| 253 | return None; |
| 254 | } |
| 255 | |
| 256 | static object * |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 257 | file_isatty(f, args) |
| 258 | fileobject *f; |
| 259 | object *args; |
| 260 | { |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 261 | if (f->f_fp == NULL) |
| 262 | return err_closed(); |
| 263 | if (!getnoarg(args)) |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 264 | return NULL; |
Guido van Rossum | 51415a7 | 1992-03-27 17:23:38 +0000 | [diff] [blame] | 265 | return newintobject((long)isatty((int)fileno(f->f_fp))); |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 266 | } |
| 267 | |
| 268 | static object * |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 269 | file_read(f, args) |
| 270 | fileobject *f; |
| 271 | object *args; |
| 272 | { |
| 273 | int n, n1, n2, n3; |
| 274 | object *v; |
| 275 | |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 276 | if (f->f_fp == NULL) |
| 277 | return err_closed(); |
| 278 | if (args == NULL) { |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 279 | n = 0; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 280 | if (n < 0) { |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 281 | err_setstr(ValueError, "negative read count"); |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 282 | return NULL; |
| 283 | } |
| 284 | } |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 285 | else if (!getargs(args, "i", &n)) |
| 286 | return NULL; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 287 | |
| 288 | n2 = n != 0 ? n : BUFSIZ; |
| 289 | v = newsizedstringobject((char *)NULL, n2); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 290 | if (v == NULL) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 291 | return NULL; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 292 | n1 = 0; |
| 293 | for (;;) { |
| 294 | n3 = fread(BUF(v)+n1, 1, n2-n1, f->f_fp); |
| 295 | /* XXX Error check? */ |
| 296 | if (n3 == 0) |
| 297 | break; |
| 298 | n1 += n3; |
| 299 | if (n1 == n) |
| 300 | break; |
| 301 | if (n == 0) { |
| 302 | n2 = n1 + BUFSIZ; |
| 303 | if (resizestring(&v, n2) < 0) |
| 304 | return NULL; |
| 305 | } |
| 306 | } |
| 307 | if (n1 != n2) |
| 308 | resizestring(&v, n1); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 309 | return v; |
| 310 | } |
| 311 | |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 312 | /* Internal routine to get a line. |
| 313 | Size argument interpretation: |
| 314 | > 0: max length; |
| 315 | = 0: read arbitrary line; |
| 316 | < 0: strip trailing '\n', raise EOFError if EOF reached immediately |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 317 | */ |
| 318 | |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 319 | object * |
| 320 | getline(f, n) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 321 | fileobject *f; |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 322 | int n; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 323 | { |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame^] | 324 | void *save, *save_thread(), restore_thread(); |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 325 | register FILE *fp; |
| 326 | register int c; |
| 327 | register char *buf, *end; |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 328 | int n1, n2; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 329 | object *v; |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 330 | |
Guido van Rossum | c10aa77 | 1992-07-31 12:42:38 +0000 | [diff] [blame] | 331 | fp = f->f_fp; |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 332 | n2 = n > 0 ? n : 100; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 333 | v = newsizedstringobject((char *)NULL, n2); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 334 | if (v == NULL) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 335 | return NULL; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 336 | buf = BUF(v); |
| 337 | end = buf + n2; |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame^] | 338 | |
| 339 | save = save_thread(); |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 340 | for (;;) { |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 341 | if ((c = getc(fp)) == EOF) { |
Guido van Rossum | 76ad8ed | 1991-06-03 10:54:55 +0000 | [diff] [blame] | 342 | clearerr(fp); |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 343 | if (intrcheck()) { |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame^] | 344 | restore_thread(save); |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 345 | DECREF(v); |
| 346 | err_set(KeyboardInterrupt); |
| 347 | return NULL; |
| 348 | } |
| 349 | if (n < 0 && buf == BUF(v)) { |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame^] | 350 | restore_thread(save); |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 351 | DECREF(v); |
Guido van Rossum | 201be05 | 1991-12-24 13:26:41 +0000 | [diff] [blame] | 352 | err_setstr(EOFError, |
| 353 | "EOF when reading a line"); |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 354 | return NULL; |
| 355 | } |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 356 | break; |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 357 | } |
| 358 | if ((*buf++ = c) == '\n') { |
| 359 | if (n < 0) |
| 360 | buf--; |
| 361 | break; |
| 362 | } |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 363 | if (buf == end) { |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 364 | if (n > 0) |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 365 | break; |
| 366 | n1 = n2; |
| 367 | n2 += 1000; |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame^] | 368 | restore_thread(save); |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 369 | if (resizestring(&v, n2) < 0) |
| 370 | return NULL; |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame^] | 371 | save = save_thread(); |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 372 | buf = BUF(v) + n1; |
| 373 | end = BUF(v) + n2; |
| 374 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 375 | } |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame^] | 376 | restore_thread(save); |
| 377 | |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 378 | n1 = buf - BUF(v); |
| 379 | if (n1 != n2) |
| 380 | resizestring(&v, n1); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 381 | return v; |
| 382 | } |
| 383 | |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 384 | /* External C interface */ |
| 385 | |
| 386 | object * |
| 387 | filegetline(f, n) |
| 388 | object *f; |
| 389 | int n; |
| 390 | { |
| 391 | if (f == NULL || !is_fileobject(f)) { |
| 392 | err_badcall(); |
| 393 | return NULL; |
| 394 | } |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 395 | if (((fileobject*)f)->f_fp == NULL) |
| 396 | return err_closed(); |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 397 | return getline((fileobject *)f, n); |
| 398 | } |
| 399 | |
| 400 | /* Python method */ |
| 401 | |
| 402 | static object * |
| 403 | file_readline(f, args) |
| 404 | fileobject *f; |
| 405 | object *args; |
| 406 | { |
| 407 | int n; |
| 408 | |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 409 | if (f->f_fp == NULL) |
| 410 | return err_closed(); |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 411 | if (args == NULL) |
| 412 | n = 0; /* Unlimited */ |
| 413 | else { |
| 414 | if (!getintarg(args, &n)) |
| 415 | return NULL; |
| 416 | if (n < 0) { |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 417 | err_setstr(ValueError, "negative readline count"); |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 418 | return NULL; |
| 419 | } |
| 420 | } |
| 421 | |
Guido van Rossum | 51415a7 | 1992-03-27 17:23:38 +0000 | [diff] [blame] | 422 | return getline(f, n); |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 423 | } |
| 424 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 425 | static object * |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 426 | file_readlines(f, args) |
| 427 | fileobject *f; |
| 428 | object *args; |
| 429 | { |
| 430 | object *list; |
| 431 | object *line; |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 432 | |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 433 | if (f->f_fp == NULL) |
| 434 | return err_closed(); |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 435 | if (!getnoarg(args)) |
| 436 | return NULL; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 437 | if ((list = newlistobject(0)) == NULL) |
| 438 | return NULL; |
| 439 | for (;;) { |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 440 | line = getline(f, 0); |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 441 | if (line != NULL && getstringsize(line) == 0) { |
| 442 | DECREF(line); |
| 443 | break; |
| 444 | } |
| 445 | if (line == NULL || addlistitem(list, line) != 0) { |
| 446 | DECREF(list); |
| 447 | XDECREF(line); |
| 448 | return NULL; |
| 449 | } |
| 450 | DECREF(line); |
| 451 | } |
| 452 | return list; |
| 453 | } |
| 454 | |
| 455 | static object * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 456 | file_write(f, args) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 457 | fileobject *f; |
| 458 | object *args; |
| 459 | { |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 460 | char *s; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 461 | int n, n2; |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 462 | if (f->f_fp == NULL) |
| 463 | return err_closed(); |
| 464 | if (!getargs(args, "s#", &s, &n)) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 465 | return NULL; |
Guido van Rossum | eb183da | 1991-04-04 10:44:06 +0000 | [diff] [blame] | 466 | f->f_softspace = 0; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 467 | errno = 0; |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 468 | n2 = fwrite(s, 1, n, f->f_fp); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 469 | if (n2 != n) { |
Guido van Rossum | 87e7ea7 | 1991-12-10 14:00:03 +0000 | [diff] [blame] | 470 | err_errno(IOError); |
Guido van Rossum | febd551 | 1992-03-04 16:39:24 +0000 | [diff] [blame] | 471 | clearerr(f->f_fp); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 472 | return NULL; |
| 473 | } |
| 474 | INCREF(None); |
| 475 | return None; |
| 476 | } |
| 477 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 478 | static struct methodlist file_methods[] = { |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 479 | {"close", file_close}, |
| 480 | {"flush", file_flush}, |
Guido van Rossum | ed233a5 | 1992-06-23 09:07:03 +0000 | [diff] [blame] | 481 | {"fileno", file_fileno}, |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 482 | {"isatty", file_isatty}, |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 483 | {"read", file_read}, |
| 484 | {"readline", file_readline}, |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 485 | {"readlines", file_readlines}, |
| 486 | {"seek", file_seek}, |
| 487 | {"tell", file_tell}, |
| 488 | {"write", file_write}, |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 489 | {NULL, NULL} /* sentinel */ |
| 490 | }; |
| 491 | |
| 492 | static object * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 493 | file_getattr(f, name) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 494 | fileobject *f; |
| 495 | char *name; |
| 496 | { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 497 | return findmethod(file_methods, (object *)f, name); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 498 | } |
| 499 | |
| 500 | typeobject Filetype = { |
| 501 | OB_HEAD_INIT(&Typetype) |
| 502 | 0, |
| 503 | "file", |
| 504 | sizeof(fileobject), |
| 505 | 0, |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 506 | file_dealloc, /*tp_dealloc*/ |
| 507 | file_print, /*tp_print*/ |
| 508 | file_getattr, /*tp_getattr*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 509 | 0, /*tp_setattr*/ |
| 510 | 0, /*tp_compare*/ |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 511 | file_repr, /*tp_repr*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 512 | }; |
Guido van Rossum | eb183da | 1991-04-04 10:44:06 +0000 | [diff] [blame] | 513 | |
| 514 | /* Interface for the 'soft space' between print items. */ |
| 515 | |
| 516 | int |
| 517 | softspace(f, newflag) |
| 518 | object *f; |
| 519 | int newflag; |
| 520 | { |
| 521 | int oldflag = 0; |
| 522 | if (f != NULL && is_fileobject(f)) { |
| 523 | oldflag = ((fileobject *)f)->f_softspace; |
| 524 | ((fileobject *)f)->f_softspace = newflag; |
| 525 | } |
| 526 | return oldflag; |
| 527 | } |