Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 1 | /*********************************************************** |
| 2 | Copyright 1991 by Stichting Mathematisch Centrum, Amsterdam, The |
| 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 | { |
| 50 | if (!is_fileobject(f)) { |
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; |
| 86 | FILE *fp; |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 87 | f = (fileobject *) newopenfileobject((FILE *)NULL, name, mode, fclose); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 88 | if (f == NULL) |
| 89 | return NULL; |
Guido van Rossum | a08095a | 1991-02-13 23:25:27 +0000 | [diff] [blame] | 90 | #ifdef THINK_C |
| 91 | if (*mode == '*') { |
| 92 | FILE *fopenRF(); |
| 93 | f->f_fp = fopenRF(name, mode+1); |
| 94 | } |
| 95 | else |
| 96 | #endif |
| 97 | f->f_fp = fopen(name, mode); |
| 98 | if (f->f_fp == NULL) { |
Guido van Rossum | 87e7ea7 | 1991-12-10 14:00:03 +0000 | [diff] [blame] | 99 | err_errno(IOError); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 100 | DECREF(f); |
| 101 | return NULL; |
| 102 | } |
| 103 | return (object *)f; |
| 104 | } |
| 105 | |
| 106 | /* Methods */ |
| 107 | |
| 108 | static void |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 109 | file_dealloc(f) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 110 | fileobject *f; |
| 111 | { |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 112 | if (f->f_fp != NULL && f->f_close != NULL) |
| 113 | (*f->f_close)(f->f_fp); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 114 | if (f->f_name != NULL) |
| 115 | DECREF(f->f_name); |
| 116 | if (f->f_mode != NULL) |
| 117 | DECREF(f->f_mode); |
| 118 | free((char *)f); |
| 119 | } |
| 120 | |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 121 | static int |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 122 | file_print(f, fp, flags) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 123 | fileobject *f; |
| 124 | FILE *fp; |
| 125 | int flags; |
| 126 | { |
| 127 | fprintf(fp, "<%s file ", f->f_fp == NULL ? "closed" : "open"); |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 128 | if (printobject(f->f_name, fp, flags) != 0) |
| 129 | return -1; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 130 | fprintf(fp, ", mode "); |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 131 | if (printobject(f->f_mode, fp, flags) != 0) |
| 132 | return -1; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 133 | fprintf(fp, ">"); |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 134 | return 0; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 135 | } |
| 136 | |
| 137 | static object * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 138 | file_repr(f) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 139 | fileobject *f; |
| 140 | { |
| 141 | char buf[300]; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 142 | /* XXX This differs from file_print if the filename contains |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 143 | quotes or other funny characters. */ |
| 144 | sprintf(buf, "<%s file '%.256s', mode '%.10s'>", |
| 145 | f->f_fp == NULL ? "closed" : "open", |
| 146 | getstringvalue(f->f_name), |
| 147 | getstringvalue(f->f_mode)); |
| 148 | return newstringobject(buf); |
| 149 | } |
| 150 | |
| 151 | static object * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 152 | file_close(f, args) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 153 | fileobject *f; |
| 154 | object *args; |
| 155 | { |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 156 | int sts = 0; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 157 | if (args != NULL) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 158 | err_badarg(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 159 | return NULL; |
| 160 | } |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 161 | errno = 0; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 162 | if (f->f_fp != NULL) { |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 163 | if (f->f_close != NULL) |
| 164 | sts = (*f->f_close)(f->f_fp); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 165 | f->f_fp = NULL; |
| 166 | } |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 167 | if (sts == EOF) { |
| 168 | if (errno == 0) |
| 169 | errno = EIO; |
Guido van Rossum | 87e7ea7 | 1991-12-10 14:00:03 +0000 | [diff] [blame] | 170 | return err_errno(IOError); |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 171 | } |
| 172 | if (sts != 0) |
| 173 | return newintobject((long)sts); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 174 | INCREF(None); |
| 175 | return None; |
| 176 | } |
| 177 | |
| 178 | static object * |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 179 | file_seek(f, args) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 180 | fileobject *f; |
| 181 | object *args; |
| 182 | { |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 183 | long offset; |
| 184 | long whence; |
| 185 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 186 | if (f->f_fp == NULL) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 187 | err_badarg(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 188 | return NULL; |
| 189 | } |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 190 | if (args != NULL && is_intobject(args)) { |
| 191 | offset = getintvalue(args); |
| 192 | whence = 0; /* SEEK_SET */ |
| 193 | } |
| 194 | else { |
Guido van Rossum | 18a372f | 1991-09-10 14:55:58 +0000 | [diff] [blame] | 195 | if (!getlonglongarg(args, &offset, &whence)) |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 196 | return NULL; |
| 197 | } |
| 198 | errno = 0; |
| 199 | if (fseek(f->f_fp, offset, (int)whence) != 0) { |
| 200 | if (errno == 0) |
| 201 | errno = EIO; |
Guido van Rossum | 87e7ea7 | 1991-12-10 14:00:03 +0000 | [diff] [blame] | 202 | return err_errno(IOError); |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 203 | } |
| 204 | INCREF(None); |
| 205 | return None; |
| 206 | } |
| 207 | |
| 208 | static object * |
| 209 | file_tell(f, args) |
| 210 | fileobject *f; |
| 211 | object *args; |
| 212 | { |
| 213 | long offset; |
| 214 | if (args != NULL || f->f_fp == NULL) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 215 | err_badarg(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 216 | return NULL; |
| 217 | } |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 218 | errno = 0; |
| 219 | offset = ftell(f->f_fp); |
| 220 | if (offset == -1L) { |
| 221 | if (errno == 0) |
| 222 | errno = EIO; |
Guido van Rossum | 87e7ea7 | 1991-12-10 14:00:03 +0000 | [diff] [blame] | 223 | return err_errno(IOError); |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 224 | } |
| 225 | return newintobject(offset); |
| 226 | } |
| 227 | |
| 228 | static object * |
| 229 | file_flush(f, args) |
| 230 | fileobject *f; |
| 231 | object *args; |
| 232 | { |
| 233 | if (args != NULL || f->f_fp == NULL) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 234 | err_badarg(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 235 | return NULL; |
| 236 | } |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 237 | errno = 0; |
| 238 | if (fflush(f->f_fp) != 0) { |
| 239 | if (errno == 0) |
| 240 | errno = EIO; |
Guido van Rossum | 87e7ea7 | 1991-12-10 14:00:03 +0000 | [diff] [blame] | 241 | return err_errno(IOError); |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 242 | } |
| 243 | INCREF(None); |
| 244 | return None; |
| 245 | } |
| 246 | |
| 247 | static object * |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 248 | file_isatty(f, args) |
| 249 | fileobject *f; |
| 250 | object *args; |
| 251 | { |
| 252 | if (args != NULL || f->f_fp == NULL) { |
| 253 | err_badarg(); |
| 254 | return NULL; |
| 255 | } |
| 256 | return newintobject((long)isatty(fileno(f->f_fp))); |
| 257 | } |
| 258 | |
| 259 | static object * |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 260 | file_read(f, args) |
| 261 | fileobject *f; |
| 262 | object *args; |
| 263 | { |
| 264 | int n, n1, n2, n3; |
| 265 | object *v; |
| 266 | |
| 267 | if (f->f_fp == NULL) { |
| 268 | err_badarg(); |
| 269 | return NULL; |
| 270 | } |
| 271 | if (args == 0) |
| 272 | n = 0; |
| 273 | else { |
| 274 | if (!getintarg(args, &n)) |
| 275 | return NULL; |
| 276 | if (n < 0) { |
| 277 | err_badarg(); |
| 278 | return NULL; |
| 279 | } |
| 280 | } |
| 281 | |
| 282 | n2 = n != 0 ? n : BUFSIZ; |
| 283 | v = newsizedstringobject((char *)NULL, n2); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 284 | if (v == NULL) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 285 | return NULL; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 286 | n1 = 0; |
| 287 | for (;;) { |
| 288 | n3 = fread(BUF(v)+n1, 1, n2-n1, f->f_fp); |
| 289 | /* XXX Error check? */ |
| 290 | if (n3 == 0) |
| 291 | break; |
| 292 | n1 += n3; |
| 293 | if (n1 == n) |
| 294 | break; |
| 295 | if (n == 0) { |
| 296 | n2 = n1 + BUFSIZ; |
| 297 | if (resizestring(&v, n2) < 0) |
| 298 | return NULL; |
| 299 | } |
| 300 | } |
| 301 | if (n1 != n2) |
| 302 | resizestring(&v, n1); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 303 | return v; |
| 304 | } |
| 305 | |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 306 | /* Internal routine to get a line. |
| 307 | Size argument interpretation: |
| 308 | > 0: max length; |
| 309 | = 0: read arbitrary line; |
| 310 | < 0: strip trailing '\n', raise EOFError if EOF reached immediately |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 311 | */ |
| 312 | |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 313 | object * |
| 314 | getline(f, n) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 315 | fileobject *f; |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 316 | int n; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 317 | { |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 318 | register FILE *fp; |
| 319 | register int c; |
| 320 | register char *buf, *end; |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 321 | int n1, n2; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 322 | object *v; |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 323 | |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 324 | if ((fp = f->f_fp) == NULL) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 325 | err_badarg(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 326 | return NULL; |
| 327 | } |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 328 | |
| 329 | n2 = n > 0 ? n : 100; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 330 | v = newsizedstringobject((char *)NULL, n2); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 331 | if (v == NULL) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 332 | return NULL; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 333 | buf = BUF(v); |
| 334 | end = buf + n2; |
| 335 | |
| 336 | for (;;) { |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 337 | if ((c = getc(fp)) == EOF) { |
Guido van Rossum | 76ad8ed | 1991-06-03 10:54:55 +0000 | [diff] [blame] | 338 | clearerr(fp); |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 339 | if (intrcheck()) { |
| 340 | DECREF(v); |
| 341 | err_set(KeyboardInterrupt); |
| 342 | return NULL; |
| 343 | } |
| 344 | if (n < 0 && buf == BUF(v)) { |
| 345 | DECREF(v); |
Guido van Rossum | 201be05 | 1991-12-24 13:26:41 +0000 | [diff] [blame] | 346 | err_setstr(EOFError, |
| 347 | "EOF when reading a line"); |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 348 | return NULL; |
| 349 | } |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 350 | break; |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 351 | } |
| 352 | if ((*buf++ = c) == '\n') { |
| 353 | if (n < 0) |
| 354 | buf--; |
| 355 | break; |
| 356 | } |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 357 | if (buf == end) { |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 358 | if (n > 0) |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 359 | break; |
| 360 | n1 = n2; |
| 361 | n2 += 1000; |
| 362 | if (resizestring(&v, n2) < 0) |
| 363 | return NULL; |
| 364 | buf = BUF(v) + n1; |
| 365 | end = BUF(v) + n2; |
| 366 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 367 | } |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 368 | |
| 369 | n1 = buf - BUF(v); |
| 370 | if (n1 != n2) |
| 371 | resizestring(&v, n1); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 372 | return v; |
| 373 | } |
| 374 | |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 375 | /* External C interface */ |
| 376 | |
| 377 | object * |
| 378 | filegetline(f, n) |
| 379 | object *f; |
| 380 | int n; |
| 381 | { |
| 382 | if (f == NULL || !is_fileobject(f)) { |
| 383 | err_badcall(); |
| 384 | return NULL; |
| 385 | } |
| 386 | return getline((fileobject *)f, n); |
| 387 | } |
| 388 | |
| 389 | /* Python method */ |
| 390 | |
| 391 | static object * |
| 392 | file_readline(f, args) |
| 393 | fileobject *f; |
| 394 | object *args; |
| 395 | { |
| 396 | int n; |
| 397 | |
| 398 | if (args == NULL) |
| 399 | n = 0; /* Unlimited */ |
| 400 | else { |
| 401 | if (!getintarg(args, &n)) |
| 402 | return NULL; |
| 403 | if (n < 0) { |
| 404 | err_badarg(); |
| 405 | return NULL; |
| 406 | } |
| 407 | } |
| 408 | |
| 409 | return getline((object *)f, n); |
| 410 | } |
| 411 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 412 | static object * |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 413 | file_readlines(f, args) |
| 414 | fileobject *f; |
| 415 | object *args; |
| 416 | { |
| 417 | object *list; |
| 418 | object *line; |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 419 | |
| 420 | if (!getnoarg(args)) |
| 421 | return NULL; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 422 | if ((list = newlistobject(0)) == NULL) |
| 423 | return NULL; |
| 424 | for (;;) { |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 425 | line = getline(f, 0); |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 426 | if (line != NULL && getstringsize(line) == 0) { |
| 427 | DECREF(line); |
| 428 | break; |
| 429 | } |
| 430 | if (line == NULL || addlistitem(list, line) != 0) { |
| 431 | DECREF(list); |
| 432 | XDECREF(line); |
| 433 | return NULL; |
| 434 | } |
| 435 | DECREF(line); |
| 436 | } |
| 437 | return list; |
| 438 | } |
| 439 | |
| 440 | static object * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 441 | file_write(f, args) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 442 | fileobject *f; |
| 443 | object *args; |
| 444 | { |
| 445 | int n, n2; |
| 446 | if (f->f_fp == NULL) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 447 | err_badarg(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 448 | return NULL; |
| 449 | } |
| 450 | if (args == NULL || !is_stringobject(args)) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 451 | err_badarg(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 452 | return NULL; |
| 453 | } |
Guido van Rossum | eb183da | 1991-04-04 10:44:06 +0000 | [diff] [blame] | 454 | f->f_softspace = 0; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 455 | errno = 0; |
Guido van Rossum | 87e7ea7 | 1991-12-10 14:00:03 +0000 | [diff] [blame] | 456 | n2 = fwrite(getstringvalue(args), 1, n = getstringsize(args), f->f_fp); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 457 | if (n2 != n) { |
| 458 | if (errno == 0) |
| 459 | errno = EIO; |
Guido van Rossum | 87e7ea7 | 1991-12-10 14:00:03 +0000 | [diff] [blame] | 460 | err_errno(IOError); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 461 | return NULL; |
| 462 | } |
| 463 | INCREF(None); |
| 464 | return None; |
| 465 | } |
| 466 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 467 | static struct methodlist file_methods[] = { |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 468 | {"close", file_close}, |
| 469 | {"flush", file_flush}, |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 470 | {"isatty", file_isatty}, |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 471 | {"read", file_read}, |
| 472 | {"readline", file_readline}, |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 473 | {"readlines", file_readlines}, |
| 474 | {"seek", file_seek}, |
| 475 | {"tell", file_tell}, |
| 476 | {"write", file_write}, |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 477 | {NULL, NULL} /* sentinel */ |
| 478 | }; |
| 479 | |
| 480 | static object * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 481 | file_getattr(f, name) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 482 | fileobject *f; |
| 483 | char *name; |
| 484 | { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 485 | return findmethod(file_methods, (object *)f, name); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 486 | } |
| 487 | |
| 488 | typeobject Filetype = { |
| 489 | OB_HEAD_INIT(&Typetype) |
| 490 | 0, |
| 491 | "file", |
| 492 | sizeof(fileobject), |
| 493 | 0, |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 494 | file_dealloc, /*tp_dealloc*/ |
| 495 | file_print, /*tp_print*/ |
| 496 | file_getattr, /*tp_getattr*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 497 | 0, /*tp_setattr*/ |
| 498 | 0, /*tp_compare*/ |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 499 | file_repr, /*tp_repr*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 500 | }; |
Guido van Rossum | eb183da | 1991-04-04 10:44:06 +0000 | [diff] [blame] | 501 | |
| 502 | /* Interface for the 'soft space' between print items. */ |
| 503 | |
| 504 | int |
| 505 | softspace(f, newflag) |
| 506 | object *f; |
| 507 | int newflag; |
| 508 | { |
| 509 | int oldflag = 0; |
| 510 | if (f != NULL && is_fileobject(f)) { |
| 511 | oldflag = ((fileobject *)f)->f_softspace; |
| 512 | ((fileobject *)f)->f_softspace = newflag; |
| 513 | } |
| 514 | return oldflag; |
| 515 | } |