Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 1 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 2 | /* File object implementation */ |
| 3 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 4 | #include "Python.h" |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 5 | #include "structmember.h" |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 6 | |
Jack Jansen | e979160 | 2000-08-22 21:51:22 +0000 | [diff] [blame] | 7 | #ifdef HAVE_LIMITS_H |
| 8 | #include <limits.h> |
| 9 | #endif |
| 10 | |
Guido van Rossum | ff7e83d | 1999-08-27 20:39:37 +0000 | [diff] [blame] | 11 | #ifndef DONT_HAVE_SYS_TYPES_H |
Guido van Rossum | 4149843 | 1999-01-07 22:09:51 +0000 | [diff] [blame] | 12 | #include <sys/types.h> |
Guido van Rossum | ff7e83d | 1999-08-27 20:39:37 +0000 | [diff] [blame] | 13 | #endif /* DONT_HAVE_SYS_TYPES_H */ |
Guido van Rossum | 4149843 | 1999-01-07 22:09:51 +0000 | [diff] [blame] | 14 | |
Guido van Rossum | eceebb8 | 2000-06-28 20:57:07 +0000 | [diff] [blame] | 15 | /* We expect that fstat exists on most systems. |
| 16 | It's confirmed on Unix, Mac and Windows. |
| 17 | If you don't have it, add #define DONT_HAVE_FSTAT to your config.h. */ |
| 18 | #ifndef DONT_HAVE_FSTAT |
| 19 | #define HAVE_FSTAT |
| 20 | |
| 21 | #ifndef DONT_HAVE_SYS_TYPES_H |
| 22 | #include <sys/types.h> |
| 23 | #endif |
| 24 | |
| 25 | #ifndef DONT_HAVE_SYS_STAT_H |
| 26 | #include <sys/stat.h> |
| 27 | #else |
| 28 | #ifdef HAVE_STAT_H |
| 29 | #include <stat.h> |
| 30 | #endif |
| 31 | #endif |
| 32 | |
| 33 | #endif /* DONT_HAVE_FSTAT */ |
| 34 | |
Guido van Rossum | 685a38e | 1996-12-05 21:54:17 +0000 | [diff] [blame] | 35 | #ifdef HAVE_UNISTD_H |
| 36 | #include <unistd.h> |
| 37 | #endif |
| 38 | |
Guido van Rossum | b819914 | 1997-05-06 15:23:24 +0000 | [diff] [blame] | 39 | #ifdef MS_WIN32 |
Guido van Rossum | b819914 | 1997-05-06 15:23:24 +0000 | [diff] [blame] | 40 | #define fileno _fileno |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 41 | /* can (almost fully) duplicate with _chsize, see file_truncate */ |
Guido van Rossum | b819914 | 1997-05-06 15:23:24 +0000 | [diff] [blame] | 42 | #define HAVE_FTRUNCATE |
| 43 | #endif |
| 44 | |
Guido van Rossum | f2044e1 | 1998-04-28 16:05:59 +0000 | [diff] [blame] | 45 | #ifdef macintosh |
| 46 | #ifdef USE_GUSI |
| 47 | #define HAVE_FTRUNCATE |
| 48 | #endif |
| 49 | #endif |
| 50 | |
Jack Jansen | e08dea19 | 1995-04-23 22:12:47 +0000 | [diff] [blame] | 51 | #ifdef __MWERKS__ |
| 52 | /* Mwerks fopen() doesn't always set errno */ |
| 53 | #define NO_FOPEN_ERRNO |
| 54 | #endif |
Guido van Rossum | 295d171 | 1995-02-19 15:55:19 +0000 | [diff] [blame] | 55 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 56 | #define BUF(v) PyString_AS_STRING((PyStringObject *)v) |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 57 | |
Guido van Rossum | ff7e83d | 1999-08-27 20:39:37 +0000 | [diff] [blame] | 58 | #ifndef DONT_HAVE_ERRNO_H |
Guido van Rossum | f1dc566 | 1993-07-05 10:31:29 +0000 | [diff] [blame] | 59 | #include <errno.h> |
Guido van Rossum | ff7e83d | 1999-08-27 20:39:37 +0000 | [diff] [blame] | 60 | #endif |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 61 | |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 62 | /* define the appropriate 64-bit capable tell() function */ |
Guido van Rossum | 1a5e583 | 2000-09-21 22:15:29 +0000 | [diff] [blame^] | 63 | #if defined(MS_WIN64) |
| 64 | #define TELL64 _telli64 |
| 65 | #elif defined(__NetBSD__) || defined(__OpenBSD__) |
| 66 | /* NOTE: this is only used on older |
| 67 | NetBSD prior to f*o() funcions */ |
| 68 | #define TELL64(fd) lseek((fd),0,SEEK_CUR) |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 69 | #endif |
| 70 | |
| 71 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 72 | typedef struct { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 73 | PyObject_HEAD |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 74 | FILE *f_fp; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 75 | PyObject *f_name; |
| 76 | PyObject *f_mode; |
Tim Peters | dbd9ba6 | 2000-07-09 03:09:57 +0000 | [diff] [blame] | 77 | int (*f_close)(FILE *); |
Guido van Rossum | eb183da | 1991-04-04 10:44:06 +0000 | [diff] [blame] | 78 | int f_softspace; /* Flag used by 'print' command */ |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 79 | int f_binary; /* Flag which indicates whether the file is open |
| 80 | open in binary (1) or test (0) mode */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 81 | } PyFileObject; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 82 | |
| 83 | FILE * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 84 | PyFile_AsFile(PyObject *f) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 85 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 86 | if (f == NULL || !PyFile_Check(f)) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 87 | return NULL; |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 88 | else |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 89 | return ((PyFileObject *)f)->f_fp; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 90 | } |
| 91 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 92 | PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 93 | PyFile_Name(PyObject *f) |
Guido van Rossum | db3165e | 1993-10-18 17:06:59 +0000 | [diff] [blame] | 94 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 95 | if (f == NULL || !PyFile_Check(f)) |
Guido van Rossum | db3165e | 1993-10-18 17:06:59 +0000 | [diff] [blame] | 96 | return NULL; |
| 97 | else |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 98 | return ((PyFileObject *)f)->f_name; |
Guido van Rossum | db3165e | 1993-10-18 17:06:59 +0000 | [diff] [blame] | 99 | } |
| 100 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 101 | PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 102 | PyFile_FromFile(FILE *fp, char *name, char *mode, int (*close)(FILE *)) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 103 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 104 | PyFileObject *f = PyObject_NEW(PyFileObject, &PyFile_Type); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 105 | if (f == NULL) |
| 106 | return NULL; |
| 107 | f->f_fp = NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 108 | f->f_name = PyString_FromString(name); |
| 109 | f->f_mode = PyString_FromString(mode); |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 110 | f->f_close = close; |
Guido van Rossum | eb183da | 1991-04-04 10:44:06 +0000 | [diff] [blame] | 111 | f->f_softspace = 0; |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 112 | if (strchr(mode,'b') != NULL) |
| 113 | f->f_binary = 1; |
| 114 | else |
| 115 | f->f_binary = 0; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 116 | if (f->f_name == NULL || f->f_mode == NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 117 | Py_DECREF(f); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 118 | return NULL; |
| 119 | } |
| 120 | f->f_fp = fp; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 121 | return (PyObject *) f; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 122 | } |
| 123 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 124 | PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 125 | PyFile_FromString(char *name, char *mode) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 126 | { |
Tim Peters | dbd9ba6 | 2000-07-09 03:09:57 +0000 | [diff] [blame] | 127 | extern int fclose(FILE *); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 128 | PyFileObject *f; |
| 129 | f = (PyFileObject *) PyFile_FromFile((FILE *)NULL, name, mode, fclose); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 130 | if (f == NULL) |
| 131 | return NULL; |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 132 | #ifdef HAVE_FOPENRF |
Guido van Rossum | a08095a | 1991-02-13 23:25:27 +0000 | [diff] [blame] | 133 | if (*mode == '*') { |
| 134 | FILE *fopenRF(); |
| 135 | f->f_fp = fopenRF(name, mode+1); |
| 136 | } |
| 137 | else |
| 138 | #endif |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 139 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 140 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 141 | f->f_fp = fopen(name, mode); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 142 | Py_END_ALLOW_THREADS |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 143 | } |
Guido van Rossum | a08095a | 1991-02-13 23:25:27 +0000 | [diff] [blame] | 144 | if (f->f_fp == NULL) { |
Jack Jansen | e08dea19 | 1995-04-23 22:12:47 +0000 | [diff] [blame] | 145 | #ifdef NO_FOPEN_ERRNO |
Barry Warsaw | 52ddc0e | 1998-07-23 16:07:02 +0000 | [diff] [blame] | 146 | /* Metroworks only, not testable, so unchanged */ |
Jack Jansen | e08dea19 | 1995-04-23 22:12:47 +0000 | [diff] [blame] | 147 | if ( errno == 0 ) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 148 | PyErr_SetString(PyExc_IOError, "Cannot open file"); |
| 149 | Py_DECREF(f); |
Jack Jansen | e08dea19 | 1995-04-23 22:12:47 +0000 | [diff] [blame] | 150 | return NULL; |
| 151 | } |
| 152 | #endif |
Barry Warsaw | 52ddc0e | 1998-07-23 16:07:02 +0000 | [diff] [blame] | 153 | PyErr_SetFromErrnoWithFilename(PyExc_IOError, name); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 154 | Py_DECREF(f); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 155 | return NULL; |
| 156 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 157 | return (PyObject *)f; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 158 | } |
| 159 | |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 160 | void |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 161 | PyFile_SetBufSize(PyObject *f, int bufsize) |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 162 | { |
| 163 | if (bufsize >= 0) { |
| 164 | #ifdef HAVE_SETVBUF |
| 165 | int type; |
| 166 | switch (bufsize) { |
| 167 | case 0: |
| 168 | type = _IONBF; |
| 169 | break; |
| 170 | case 1: |
| 171 | type = _IOLBF; |
| 172 | bufsize = BUFSIZ; |
| 173 | break; |
| 174 | default: |
| 175 | type = _IOFBF; |
| 176 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 177 | setvbuf(((PyFileObject *)f)->f_fp, (char *)NULL, |
| 178 | type, bufsize); |
Guido van Rossum | f8b4de0 | 1998-03-06 15:32:40 +0000 | [diff] [blame] | 179 | #else /* !HAVE_SETVBUF */ |
| 180 | if (bufsize <= 1) |
| 181 | setbuf(((PyFileObject *)f)->f_fp, (char *)NULL); |
| 182 | #endif /* !HAVE_SETVBUF */ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 183 | } |
| 184 | } |
| 185 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 186 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 187 | err_closed(void) |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 188 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 189 | PyErr_SetString(PyExc_ValueError, "I/O operation on closed file"); |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 190 | return NULL; |
| 191 | } |
| 192 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 193 | /* Methods */ |
| 194 | |
| 195 | static void |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 196 | file_dealloc(PyFileObject *f) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 197 | { |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 198 | if (f->f_fp != NULL && f->f_close != NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 199 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 200 | (*f->f_close)(f->f_fp); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 201 | Py_END_ALLOW_THREADS |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 202 | } |
Guido van Rossum | 1109fbc | 1998-04-10 22:16:39 +0000 | [diff] [blame] | 203 | if (f->f_name != NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 204 | Py_DECREF(f->f_name); |
Guido van Rossum | 1109fbc | 1998-04-10 22:16:39 +0000 | [diff] [blame] | 205 | } |
| 206 | if (f->f_mode != NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 207 | Py_DECREF(f->f_mode); |
Guido van Rossum | 1109fbc | 1998-04-10 22:16:39 +0000 | [diff] [blame] | 208 | } |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 209 | PyObject_DEL(f); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 210 | } |
| 211 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 212 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 213 | file_repr(PyFileObject *f) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 214 | { |
| 215 | char buf[300]; |
Fred Drake | a44d353 | 2000-06-30 15:01:00 +0000 | [diff] [blame] | 216 | sprintf(buf, "<%s file '%.256s', mode '%.10s' at %p>", |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 217 | f->f_fp == NULL ? "closed" : "open", |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 218 | PyString_AsString(f->f_name), |
| 219 | PyString_AsString(f->f_mode), |
Fred Drake | a44d353 | 2000-06-30 15:01:00 +0000 | [diff] [blame] | 220 | f); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 221 | return PyString_FromString(buf); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 222 | } |
| 223 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 224 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 225 | file_close(PyFileObject *f, PyObject *args) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 226 | { |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 227 | int sts = 0; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 228 | if (!PyArg_NoArgs(args)) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 229 | return NULL; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 230 | if (f->f_fp != NULL) { |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 231 | if (f->f_close != NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 232 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 233 | errno = 0; |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 234 | sts = (*f->f_close)(f->f_fp); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 235 | Py_END_ALLOW_THREADS |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 236 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 237 | f->f_fp = NULL; |
| 238 | } |
Guido van Rossum | febd551 | 1992-03-04 16:39:24 +0000 | [diff] [blame] | 239 | if (sts == EOF) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 240 | return PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 241 | if (sts != 0) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 242 | return PyInt_FromLong((long)sts); |
| 243 | Py_INCREF(Py_None); |
| 244 | return Py_None; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 245 | } |
| 246 | |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 247 | |
| 248 | /* a portable fseek() function |
| 249 | return 0 on success, non-zero on failure (with errno set) */ |
| 250 | int |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 251 | #if defined(HAVE_LARGEFILE_SUPPORT) && SIZEOF_OFF_T < 8 && SIZEOF_FPOS_T >= 8 |
Fred Drake | 8ce159a | 2000-08-31 05:18:54 +0000 | [diff] [blame] | 252 | _portable_fseek(FILE *fp, fpos_t offset, int whence) |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 253 | #else |
Fred Drake | 8ce159a | 2000-08-31 05:18:54 +0000 | [diff] [blame] | 254 | _portable_fseek(FILE *fp, off_t offset, int whence) |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 255 | #endif |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 256 | { |
| 257 | #if defined(HAVE_FSEEKO) |
| 258 | return fseeko(fp, offset, whence); |
| 259 | #elif defined(HAVE_FSEEK64) |
| 260 | return fseek64(fp, offset, whence); |
| 261 | #elif defined(HAVE_LARGEFILE_SUPPORT) && SIZEOF_FPOS_T >= 8 |
| 262 | /* lacking a 64-bit capable fseek() (as Win64 does) use a 64-bit capable |
| 263 | fsetpos() and tell() to implement fseek()*/ |
| 264 | fpos_t pos; |
| 265 | switch (whence) { |
| 266 | case SEEK_CUR: |
| 267 | if (fgetpos(fp, &pos) != 0) |
| 268 | return -1; |
| 269 | offset += pos; |
| 270 | break; |
| 271 | case SEEK_END: |
| 272 | /* do a "no-op" seek first to sync the buffering so that |
| 273 | the low-level tell() can be used correctly */ |
| 274 | if (fseek(fp, 0, SEEK_END) != 0) |
| 275 | return -1; |
| 276 | if ((pos = TELL64(fileno(fp))) == -1L) |
| 277 | return -1; |
| 278 | offset += pos; |
| 279 | break; |
| 280 | /* case SEEK_SET: break; */ |
| 281 | } |
| 282 | return fsetpos(fp, &offset); |
| 283 | #else |
| 284 | return fseek(fp, offset, whence); |
| 285 | #endif |
| 286 | } |
| 287 | |
| 288 | |
| 289 | /* a portable ftell() function |
| 290 | Return -1 on failure with errno set appropriately, current file |
| 291 | position on success */ |
| 292 | #if defined(HAVE_LARGEFILE_SUPPORT) && SIZEOF_OFF_T < 8 && SIZEOF_FPOS_T >= 8 |
| 293 | fpos_t |
| 294 | #else |
| 295 | off_t |
| 296 | #endif |
Fred Drake | 8ce159a | 2000-08-31 05:18:54 +0000 | [diff] [blame] | 297 | _portable_ftell(FILE* fp) |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 298 | { |
| 299 | #if defined(HAVE_FTELLO) && defined(HAVE_LARGEFILE_SUPPORT) |
| 300 | return ftello(fp); |
| 301 | #elif defined(HAVE_FTELL64) && defined(HAVE_LARGEFILE_SUPPORT) |
| 302 | return ftell64(fp); |
| 303 | #elif SIZEOF_FPOS_T >= 8 && defined(HAVE_LARGEFILE_SUPPORT) |
| 304 | fpos_t pos; |
| 305 | if (fgetpos(fp, &pos) != 0) |
| 306 | return -1; |
| 307 | return pos; |
| 308 | #else |
| 309 | return ftell(fp); |
| 310 | #endif |
| 311 | } |
| 312 | |
| 313 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 314 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 315 | file_seek(PyFileObject *f, PyObject *args) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 316 | { |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 317 | int whence; |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 318 | int ret; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 319 | #if defined(HAVE_LARGEFILE_SUPPORT) && SIZEOF_OFF_T < 8 && SIZEOF_FPOS_T >= 8 |
| 320 | fpos_t offset, pos; |
| 321 | #else |
Guido van Rossum | 3c9fe0c | 1999-01-06 18:51:17 +0000 | [diff] [blame] | 322 | off_t offset; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 323 | #endif /* !MS_WIN64 */ |
Guido van Rossum | 3c9fe0c | 1999-01-06 18:51:17 +0000 | [diff] [blame] | 324 | PyObject *offobj; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 325 | |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 326 | if (f->f_fp == NULL) |
| 327 | return err_closed(); |
| 328 | whence = 0; |
Guido van Rossum | 43713e5 | 2000-02-29 13:59:29 +0000 | [diff] [blame] | 329 | if (!PyArg_ParseTuple(args, "O|i:seek", &offobj, &whence)) |
Guido van Rossum | 3c9fe0c | 1999-01-06 18:51:17 +0000 | [diff] [blame] | 330 | return NULL; |
| 331 | #if !defined(HAVE_LARGEFILE_SUPPORT) |
| 332 | offset = PyInt_AsLong(offobj); |
| 333 | #else |
| 334 | offset = PyLong_Check(offobj) ? |
| 335 | PyLong_AsLongLong(offobj) : PyInt_AsLong(offobj); |
| 336 | #endif |
| 337 | if (PyErr_Occurred()) |
Guido van Rossum | 8830319 | 1999-01-04 17:22:18 +0000 | [diff] [blame] | 338 | return NULL; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 339 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 340 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 341 | errno = 0; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 342 | ret = _portable_fseek(f->f_fp, offset, whence); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 343 | Py_END_ALLOW_THREADS |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 344 | |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 345 | if (ret != 0) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 346 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | febd551 | 1992-03-04 16:39:24 +0000 | [diff] [blame] | 347 | clearerr(f->f_fp); |
| 348 | return NULL; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 349 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 350 | Py_INCREF(Py_None); |
| 351 | return Py_None; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 352 | } |
| 353 | |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 354 | |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 355 | #ifdef HAVE_FTRUNCATE |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 356 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 357 | file_truncate(PyFileObject *f, PyObject *args) |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 358 | { |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 359 | int ret; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 360 | #if defined(HAVE_LARGEFILE_SUPPORT) && SIZEOF_OFF_T < 8 && SIZEOF_FPOS_T >= 8 |
| 361 | fpos_t newsize; |
| 362 | #else |
Guido van Rossum | 3c9fe0c | 1999-01-06 18:51:17 +0000 | [diff] [blame] | 363 | off_t newsize; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 364 | #endif |
Guido van Rossum | 3c9fe0c | 1999-01-06 18:51:17 +0000 | [diff] [blame] | 365 | PyObject *newsizeobj; |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 366 | |
| 367 | if (f->f_fp == NULL) |
| 368 | return err_closed(); |
Guido van Rossum | 3c9fe0c | 1999-01-06 18:51:17 +0000 | [diff] [blame] | 369 | newsizeobj = NULL; |
Guido van Rossum | 43713e5 | 2000-02-29 13:59:29 +0000 | [diff] [blame] | 370 | if (!PyArg_ParseTuple(args, "|O:truncate", &newsizeobj)) |
Guido van Rossum | 8830319 | 1999-01-04 17:22:18 +0000 | [diff] [blame] | 371 | return NULL; |
Guido van Rossum | 3c9fe0c | 1999-01-06 18:51:17 +0000 | [diff] [blame] | 372 | if (newsizeobj != NULL) { |
| 373 | #if !defined(HAVE_LARGEFILE_SUPPORT) |
| 374 | newsize = PyInt_AsLong(newsizeobj); |
| 375 | #else |
| 376 | newsize = PyLong_Check(newsizeobj) ? |
| 377 | PyLong_AsLongLong(newsizeobj) : |
| 378 | PyInt_AsLong(newsizeobj); |
| 379 | #endif |
| 380 | if (PyErr_Occurred()) |
| 381 | return NULL; |
| 382 | } else { |
| 383 | /* Default to current position*/ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 384 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 385 | errno = 0; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 386 | newsize = _portable_ftell(f->f_fp); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 387 | Py_END_ALLOW_THREADS |
Guido van Rossum | 3c9fe0c | 1999-01-06 18:51:17 +0000 | [diff] [blame] | 388 | if (newsize == -1) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 389 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 390 | clearerr(f->f_fp); |
| 391 | return NULL; |
| 392 | } |
| 393 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 394 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 395 | errno = 0; |
| 396 | ret = fflush(f->f_fp); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 397 | Py_END_ALLOW_THREADS |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 398 | if (ret != 0) goto onioerror; |
| 399 | |
| 400 | #ifdef MS_WIN32 |
| 401 | /* can use _chsize; if, however, the newsize overflows 32-bits then |
| 402 | _chsize is *not* adequate; in this case, an OverflowError is raised */ |
| 403 | if (newsize > LONG_MAX) { |
| 404 | PyErr_SetString(PyExc_OverflowError, |
| 405 | "the new size is too long for _chsize (it is limited to 32-bit values)"); |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 406 | return NULL; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 407 | } else { |
| 408 | Py_BEGIN_ALLOW_THREADS |
| 409 | errno = 0; |
| 410 | ret = _chsize(fileno(f->f_fp), newsize); |
| 411 | Py_END_ALLOW_THREADS |
| 412 | if (ret != 0) goto onioerror; |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 413 | } |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 414 | #else |
| 415 | Py_BEGIN_ALLOW_THREADS |
| 416 | errno = 0; |
| 417 | ret = ftruncate(fileno(f->f_fp), newsize); |
| 418 | Py_END_ALLOW_THREADS |
| 419 | if (ret != 0) goto onioerror; |
| 420 | #endif /* !MS_WIN32 */ |
| 421 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 422 | Py_INCREF(Py_None); |
| 423 | return Py_None; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 424 | |
| 425 | onioerror: |
| 426 | PyErr_SetFromErrno(PyExc_IOError); |
| 427 | clearerr(f->f_fp); |
| 428 | return NULL; |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 429 | } |
| 430 | #endif /* HAVE_FTRUNCATE */ |
| 431 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 432 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 433 | file_tell(PyFileObject *f, PyObject *args) |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 434 | { |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 435 | #if defined(HAVE_LARGEFILE_SUPPORT) && SIZEOF_OFF_T < 8 && SIZEOF_FPOS_T >= 8 |
| 436 | fpos_t pos; |
| 437 | #else |
| 438 | off_t pos; |
| 439 | #endif |
| 440 | |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 441 | if (f->f_fp == NULL) |
| 442 | return err_closed(); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 443 | if (!PyArg_NoArgs(args)) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 444 | return NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 445 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 446 | errno = 0; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 447 | pos = _portable_ftell(f->f_fp); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 448 | Py_END_ALLOW_THREADS |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 449 | if (pos == -1) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 450 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | febd551 | 1992-03-04 16:39:24 +0000 | [diff] [blame] | 451 | clearerr(f->f_fp); |
| 452 | return NULL; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 453 | } |
Guido van Rossum | 3c9fe0c | 1999-01-06 18:51:17 +0000 | [diff] [blame] | 454 | #if !defined(HAVE_LARGEFILE_SUPPORT) |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 455 | return PyInt_FromLong(pos); |
Guido van Rossum | 3c9fe0c | 1999-01-06 18:51:17 +0000 | [diff] [blame] | 456 | #else |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 457 | return PyLong_FromLongLong(pos); |
Guido van Rossum | 3c9fe0c | 1999-01-06 18:51:17 +0000 | [diff] [blame] | 458 | #endif |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 459 | } |
| 460 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 461 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 462 | file_fileno(PyFileObject *f, PyObject *args) |
Guido van Rossum | ed233a5 | 1992-06-23 09:07:03 +0000 | [diff] [blame] | 463 | { |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 464 | if (f->f_fp == NULL) |
| 465 | return err_closed(); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 466 | if (!PyArg_NoArgs(args)) |
Guido van Rossum | ed233a5 | 1992-06-23 09:07:03 +0000 | [diff] [blame] | 467 | return NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 468 | return PyInt_FromLong((long) fileno(f->f_fp)); |
Guido van Rossum | ed233a5 | 1992-06-23 09:07:03 +0000 | [diff] [blame] | 469 | } |
| 470 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 471 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 472 | file_flush(PyFileObject *f, PyObject *args) |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 473 | { |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 474 | int res; |
| 475 | |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 476 | if (f->f_fp == NULL) |
| 477 | return err_closed(); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 478 | if (!PyArg_NoArgs(args)) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 479 | return NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 480 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 481 | errno = 0; |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 482 | res = fflush(f->f_fp); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 483 | Py_END_ALLOW_THREADS |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 484 | if (res != 0) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 485 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | febd551 | 1992-03-04 16:39:24 +0000 | [diff] [blame] | 486 | clearerr(f->f_fp); |
| 487 | return NULL; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 488 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 489 | Py_INCREF(Py_None); |
| 490 | return Py_None; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 491 | } |
| 492 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 493 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 494 | file_isatty(PyFileObject *f, PyObject *args) |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 495 | { |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 496 | long res; |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 497 | if (f->f_fp == NULL) |
| 498 | return err_closed(); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 499 | if (!PyArg_NoArgs(args)) |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 500 | return NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 501 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 502 | res = isatty((int)fileno(f->f_fp)); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 503 | Py_END_ALLOW_THREADS |
| 504 | return PyInt_FromLong(res); |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 505 | } |
| 506 | |
Guido van Rossum | ff7e83d | 1999-08-27 20:39:37 +0000 | [diff] [blame] | 507 | |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 508 | #if BUFSIZ < 8192 |
| 509 | #define SMALLCHUNK 8192 |
| 510 | #else |
| 511 | #define SMALLCHUNK BUFSIZ |
| 512 | #endif |
| 513 | |
Guido van Rossum | 3c25904 | 1999-01-14 19:00:14 +0000 | [diff] [blame] | 514 | #if SIZEOF_INT < 4 |
| 515 | #define BIGCHUNK (512 * 32) |
| 516 | #else |
| 517 | #define BIGCHUNK (512 * 1024) |
| 518 | #endif |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 519 | |
| 520 | static size_t |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 521 | new_buffersize(PyFileObject *f, size_t currentsize) |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 522 | { |
| 523 | #ifdef HAVE_FSTAT |
| 524 | long pos, end; |
| 525 | struct stat st; |
| 526 | if (fstat(fileno(f->f_fp), &st) == 0) { |
| 527 | end = st.st_size; |
Guido van Rossum | cada293 | 1998-12-11 20:44:56 +0000 | [diff] [blame] | 528 | /* The following is not a bug: we really need to call lseek() |
| 529 | *and* ftell(). The reason is that some stdio libraries |
| 530 | mistakenly flush their buffer when ftell() is called and |
| 531 | the lseek() call it makes fails, thereby throwing away |
| 532 | data that cannot be recovered in any way. To avoid this, |
| 533 | we first test lseek(), and only call ftell() if lseek() |
| 534 | works. We can't use the lseek() value either, because we |
| 535 | need to take the amount of buffered data into account. |
| 536 | (Yet another reason why stdio stinks. :-) */ |
Guido van Rossum | 91aaa92 | 1998-05-05 22:21:35 +0000 | [diff] [blame] | 537 | pos = lseek(fileno(f->f_fp), 0L, SEEK_CUR); |
| 538 | if (pos >= 0) |
| 539 | pos = ftell(f->f_fp); |
Guido van Rossum | d30dc0a | 1998-04-27 19:01:08 +0000 | [diff] [blame] | 540 | if (pos < 0) |
| 541 | clearerr(f->f_fp); |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 542 | if (end > pos && pos >= 0) |
Guido van Rossum | cada293 | 1998-12-11 20:44:56 +0000 | [diff] [blame] | 543 | return currentsize + end - pos + 1; |
Guido van Rossum | dcb5e7f | 1998-03-03 22:36:10 +0000 | [diff] [blame] | 544 | /* Add 1 so if the file were to grow we'd notice. */ |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 545 | } |
| 546 | #endif |
| 547 | if (currentsize > SMALLCHUNK) { |
| 548 | /* Keep doubling until we reach BIGCHUNK; |
| 549 | then keep adding BIGCHUNK. */ |
| 550 | if (currentsize <= BIGCHUNK) |
| 551 | return currentsize + currentsize; |
| 552 | else |
| 553 | return currentsize + BIGCHUNK; |
| 554 | } |
| 555 | return currentsize + SMALLCHUNK; |
| 556 | } |
| 557 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 558 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 559 | file_read(PyFileObject *f, PyObject *args) |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 560 | { |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 561 | long bytesrequested = -1; |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 562 | size_t bytesread, buffersize, chunksize; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 563 | PyObject *v; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 564 | |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 565 | if (f->f_fp == NULL) |
| 566 | return err_closed(); |
Guido van Rossum | 43713e5 | 2000-02-29 13:59:29 +0000 | [diff] [blame] | 567 | if (!PyArg_ParseTuple(args, "|l:read", &bytesrequested)) |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 568 | return NULL; |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 569 | if (bytesrequested < 0) |
Guido van Rossum | ff1ccbf | 1999-04-10 15:48:23 +0000 | [diff] [blame] | 570 | buffersize = new_buffersize(f, (size_t)0); |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 571 | else |
| 572 | buffersize = bytesrequested; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 573 | if (buffersize > INT_MAX) { |
| 574 | PyErr_SetString(PyExc_OverflowError, |
| 575 | "requested number of bytes is more than a Python string can hold"); |
| 576 | return NULL; |
| 577 | } |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 578 | v = PyString_FromStringAndSize((char *)NULL, buffersize); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 579 | if (v == NULL) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 580 | return NULL; |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 581 | bytesread = 0; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 582 | for (;;) { |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 583 | Py_BEGIN_ALLOW_THREADS |
| 584 | errno = 0; |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 585 | chunksize = fread(BUF(v) + bytesread, 1, |
| 586 | buffersize - bytesread, f->f_fp); |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 587 | Py_END_ALLOW_THREADS |
| 588 | if (chunksize == 0) { |
| 589 | if (!ferror(f->f_fp)) |
| 590 | break; |
| 591 | PyErr_SetFromErrno(PyExc_IOError); |
| 592 | clearerr(f->f_fp); |
| 593 | Py_DECREF(v); |
| 594 | return NULL; |
| 595 | } |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 596 | bytesread += chunksize; |
| 597 | if (bytesread < buffersize) |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 598 | break; |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 599 | if (bytesrequested < 0) { |
Guido van Rossum | cada293 | 1998-12-11 20:44:56 +0000 | [diff] [blame] | 600 | buffersize = new_buffersize(f, buffersize); |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 601 | if (_PyString_Resize(&v, buffersize) < 0) |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 602 | return NULL; |
| 603 | } |
| 604 | } |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 605 | if (bytesread != buffersize) |
| 606 | _PyString_Resize(&v, bytesread); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 607 | return v; |
| 608 | } |
| 609 | |
Guido van Rossum | fdf95dd | 1997-05-05 22:15:02 +0000 | [diff] [blame] | 610 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 611 | file_readinto(PyFileObject *f, PyObject *args) |
Guido van Rossum | fdf95dd | 1997-05-05 22:15:02 +0000 | [diff] [blame] | 612 | { |
| 613 | char *ptr; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 614 | size_t ntodo, ndone, nnow; |
Guido van Rossum | fdf95dd | 1997-05-05 22:15:02 +0000 | [diff] [blame] | 615 | |
| 616 | if (f->f_fp == NULL) |
| 617 | return err_closed(); |
| 618 | if (!PyArg_Parse(args, "w#", &ptr, &ntodo)) |
| 619 | return NULL; |
| 620 | ndone = 0; |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 621 | while (ntodo > 0) { |
| 622 | Py_BEGIN_ALLOW_THREADS |
| 623 | errno = 0; |
Guido van Rossum | fdf95dd | 1997-05-05 22:15:02 +0000 | [diff] [blame] | 624 | nnow = fread(ptr+ndone, 1, ntodo, f->f_fp); |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 625 | Py_END_ALLOW_THREADS |
| 626 | if (nnow == 0) { |
| 627 | if (!ferror(f->f_fp)) |
| 628 | break; |
Guido van Rossum | fdf95dd | 1997-05-05 22:15:02 +0000 | [diff] [blame] | 629 | PyErr_SetFromErrno(PyExc_IOError); |
| 630 | clearerr(f->f_fp); |
| 631 | return NULL; |
| 632 | } |
Guido van Rossum | fdf95dd | 1997-05-05 22:15:02 +0000 | [diff] [blame] | 633 | ndone += nnow; |
| 634 | ntodo -= nnow; |
| 635 | } |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 636 | return PyInt_FromLong((long)ndone); |
Guido van Rossum | fdf95dd | 1997-05-05 22:15:02 +0000 | [diff] [blame] | 637 | } |
| 638 | |
| 639 | |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 640 | /* Internal routine to get a line. |
| 641 | Size argument interpretation: |
| 642 | > 0: max length; |
| 643 | = 0: read arbitrary line; |
| 644 | < 0: strip trailing '\n', raise EOFError if EOF reached immediately |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 645 | */ |
| 646 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 647 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 648 | get_line(PyFileObject *f, int n) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 649 | { |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 650 | register FILE *fp; |
| 651 | register int c; |
| 652 | register char *buf, *end; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 653 | size_t n1, n2; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 654 | PyObject *v; |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 655 | |
Guido van Rossum | c10aa77 | 1992-07-31 12:42:38 +0000 | [diff] [blame] | 656 | fp = f->f_fp; |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 657 | n2 = n > 0 ? n : 100; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 658 | v = PyString_FromStringAndSize((char *)NULL, n2); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 659 | if (v == NULL) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 660 | return NULL; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 661 | buf = BUF(v); |
| 662 | end = buf + n2; |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 663 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 664 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 665 | for (;;) { |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 666 | if ((c = getc(fp)) == EOF) { |
Guido van Rossum | 76ad8ed | 1991-06-03 10:54:55 +0000 | [diff] [blame] | 667 | clearerr(fp); |
Guido van Rossum | f518154 | 1997-11-07 19:20:34 +0000 | [diff] [blame] | 668 | Py_BLOCK_THREADS |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 669 | if (PyErr_CheckSignals()) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 670 | Py_DECREF(v); |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 671 | return NULL; |
| 672 | } |
| 673 | if (n < 0 && buf == BUF(v)) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 674 | Py_DECREF(v); |
| 675 | PyErr_SetString(PyExc_EOFError, |
Guido van Rossum | 201be05 | 1991-12-24 13:26:41 +0000 | [diff] [blame] | 676 | "EOF when reading a line"); |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 677 | return NULL; |
| 678 | } |
Guido van Rossum | f518154 | 1997-11-07 19:20:34 +0000 | [diff] [blame] | 679 | Py_UNBLOCK_THREADS |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 680 | break; |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 681 | } |
| 682 | if ((*buf++ = c) == '\n') { |
| 683 | if (n < 0) |
| 684 | buf--; |
| 685 | break; |
| 686 | } |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 687 | if (buf == end) { |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 688 | if (n > 0) |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 689 | break; |
| 690 | n1 = n2; |
| 691 | n2 += 1000; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 692 | if (n2 > INT_MAX) { |
| 693 | PyErr_SetString(PyExc_OverflowError, |
| 694 | "line is longer than a Python string can hold"); |
| 695 | return NULL; |
| 696 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 697 | Py_BLOCK_THREADS |
| 698 | if (_PyString_Resize(&v, n2) < 0) |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 699 | return NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 700 | Py_UNBLOCK_THREADS |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 701 | buf = BUF(v) + n1; |
| 702 | end = BUF(v) + n2; |
| 703 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 704 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 705 | Py_END_ALLOW_THREADS |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 706 | |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 707 | n1 = buf - BUF(v); |
| 708 | if (n1 != n2) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 709 | _PyString_Resize(&v, n1); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 710 | return v; |
| 711 | } |
| 712 | |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 713 | /* External C interface */ |
| 714 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 715 | PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 716 | PyFile_GetLine(PyObject *f, int n) |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 717 | { |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 718 | if (f == NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 719 | PyErr_BadInternalCall(); |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 720 | return NULL; |
| 721 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 722 | if (!PyFile_Check(f)) { |
| 723 | PyObject *reader; |
| 724 | PyObject *args; |
| 725 | PyObject *result; |
| 726 | reader = PyObject_GetAttrString(f, "readline"); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 727 | if (reader == NULL) |
| 728 | return NULL; |
| 729 | if (n <= 0) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 730 | args = Py_BuildValue("()"); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 731 | else |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 732 | args = Py_BuildValue("(i)", n); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 733 | if (args == NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 734 | Py_DECREF(reader); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 735 | return NULL; |
| 736 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 737 | result = PyEval_CallObject(reader, args); |
| 738 | Py_DECREF(reader); |
| 739 | Py_DECREF(args); |
| 740 | if (result != NULL && !PyString_Check(result)) { |
| 741 | Py_DECREF(result); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 742 | result = NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 743 | PyErr_SetString(PyExc_TypeError, |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 744 | "object.readline() returned non-string"); |
| 745 | } |
| 746 | if (n < 0 && result != NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 747 | char *s = PyString_AsString(result); |
| 748 | int len = PyString_Size(result); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 749 | if (len == 0) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 750 | Py_DECREF(result); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 751 | result = NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 752 | PyErr_SetString(PyExc_EOFError, |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 753 | "EOF when reading a line"); |
| 754 | } |
| 755 | else if (s[len-1] == '\n') { |
| 756 | if (result->ob_refcnt == 1) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 757 | _PyString_Resize(&result, len-1); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 758 | else { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 759 | PyObject *v; |
| 760 | v = PyString_FromStringAndSize(s, |
| 761 | len-1); |
| 762 | Py_DECREF(result); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 763 | result = v; |
| 764 | } |
| 765 | } |
| 766 | } |
| 767 | return result; |
| 768 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 769 | if (((PyFileObject*)f)->f_fp == NULL) |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 770 | return err_closed(); |
Marc-André Lemburg | 1f46860 | 2000-07-05 15:32:40 +0000 | [diff] [blame] | 771 | return get_line((PyFileObject *)f, n); |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 772 | } |
| 773 | |
| 774 | /* Python method */ |
| 775 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 776 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 777 | file_readline(PyFileObject *f, PyObject *args) |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 778 | { |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 779 | int n = -1; |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 780 | |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 781 | if (f->f_fp == NULL) |
| 782 | return err_closed(); |
Guido van Rossum | 43713e5 | 2000-02-29 13:59:29 +0000 | [diff] [blame] | 783 | if (!PyArg_ParseTuple(args, "|i:readline", &n)) |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 784 | return NULL; |
| 785 | if (n == 0) |
| 786 | return PyString_FromString(""); |
| 787 | if (n < 0) |
| 788 | n = 0; |
Marc-André Lemburg | 1f46860 | 2000-07-05 15:32:40 +0000 | [diff] [blame] | 789 | return get_line(f, n); |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 790 | } |
| 791 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 792 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 793 | file_readlines(PyFileObject *f, PyObject *args) |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 794 | { |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 795 | long sizehint = 0; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 796 | PyObject *list; |
| 797 | PyObject *line; |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 798 | char small_buffer[SMALLCHUNK]; |
| 799 | char *buffer = small_buffer; |
| 800 | size_t buffersize = SMALLCHUNK; |
| 801 | PyObject *big_buffer = NULL; |
| 802 | size_t nfilled = 0; |
| 803 | size_t nread; |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 804 | size_t totalread = 0; |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 805 | char *p, *q, *end; |
| 806 | int err; |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 807 | |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 808 | if (f->f_fp == NULL) |
| 809 | return err_closed(); |
Guido van Rossum | 43713e5 | 2000-02-29 13:59:29 +0000 | [diff] [blame] | 810 | if (!PyArg_ParseTuple(args, "|l:readlines", &sizehint)) |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 811 | return NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 812 | if ((list = PyList_New(0)) == NULL) |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 813 | return NULL; |
| 814 | for (;;) { |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 815 | Py_BEGIN_ALLOW_THREADS |
| 816 | errno = 0; |
| 817 | nread = fread(buffer+nfilled, 1, buffersize-nfilled, f->f_fp); |
| 818 | Py_END_ALLOW_THREADS |
| 819 | if (nread == 0) { |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 820 | sizehint = 0; |
Guido van Rossum | 3da3fce | 1998-02-19 20:46:48 +0000 | [diff] [blame] | 821 | if (!ferror(f->f_fp)) |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 822 | break; |
| 823 | PyErr_SetFromErrno(PyExc_IOError); |
| 824 | clearerr(f->f_fp); |
| 825 | error: |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 826 | Py_DECREF(list); |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 827 | list = NULL; |
| 828 | goto cleanup; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 829 | } |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 830 | totalread += nread; |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 831 | p = memchr(buffer+nfilled, '\n', nread); |
| 832 | if (p == NULL) { |
| 833 | /* Need a larger buffer to fit this line */ |
| 834 | nfilled += nread; |
| 835 | buffersize *= 2; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 836 | if (buffersize > INT_MAX) { |
| 837 | PyErr_SetString(PyExc_OverflowError, |
| 838 | "line is too long for a Python string"); |
| 839 | goto error; |
| 840 | } |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 841 | if (big_buffer == NULL) { |
| 842 | /* Create the big buffer */ |
| 843 | big_buffer = PyString_FromStringAndSize( |
| 844 | NULL, buffersize); |
| 845 | if (big_buffer == NULL) |
| 846 | goto error; |
| 847 | buffer = PyString_AS_STRING(big_buffer); |
| 848 | memcpy(buffer, small_buffer, nfilled); |
| 849 | } |
| 850 | else { |
| 851 | /* Grow the big buffer */ |
| 852 | _PyString_Resize(&big_buffer, buffersize); |
| 853 | buffer = PyString_AS_STRING(big_buffer); |
| 854 | } |
| 855 | continue; |
| 856 | } |
| 857 | end = buffer+nfilled+nread; |
| 858 | q = buffer; |
| 859 | do { |
| 860 | /* Process complete lines */ |
| 861 | p++; |
| 862 | line = PyString_FromStringAndSize(q, p-q); |
| 863 | if (line == NULL) |
| 864 | goto error; |
| 865 | err = PyList_Append(list, line); |
| 866 | Py_DECREF(line); |
| 867 | if (err != 0) |
| 868 | goto error; |
| 869 | q = p; |
| 870 | p = memchr(q, '\n', end-q); |
| 871 | } while (p != NULL); |
| 872 | /* Move the remaining incomplete line to the start */ |
| 873 | nfilled = end-q; |
| 874 | memmove(buffer, q, nfilled); |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 875 | if (sizehint > 0) |
| 876 | if (totalread >= (size_t)sizehint) |
| 877 | break; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 878 | } |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 879 | if (nfilled != 0) { |
| 880 | /* Partial last line */ |
| 881 | line = PyString_FromStringAndSize(buffer, nfilled); |
| 882 | if (line == NULL) |
| 883 | goto error; |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 884 | if (sizehint > 0) { |
| 885 | /* Need to complete the last line */ |
Marc-André Lemburg | 1f46860 | 2000-07-05 15:32:40 +0000 | [diff] [blame] | 886 | PyObject *rest = get_line(f, 0); |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 887 | if (rest == NULL) { |
| 888 | Py_DECREF(line); |
| 889 | goto error; |
| 890 | } |
| 891 | PyString_Concat(&line, rest); |
| 892 | Py_DECREF(rest); |
| 893 | if (line == NULL) |
| 894 | goto error; |
| 895 | } |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 896 | err = PyList_Append(list, line); |
| 897 | Py_DECREF(line); |
| 898 | if (err != 0) |
| 899 | goto error; |
| 900 | } |
| 901 | cleanup: |
Guido van Rossum | 1109fbc | 1998-04-10 22:16:39 +0000 | [diff] [blame] | 902 | if (big_buffer) { |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 903 | Py_DECREF(big_buffer); |
Guido van Rossum | 1109fbc | 1998-04-10 22:16:39 +0000 | [diff] [blame] | 904 | } |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 905 | return list; |
| 906 | } |
| 907 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 908 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 909 | file_write(PyFileObject *f, PyObject *args) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 910 | { |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 911 | char *s; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 912 | int n, n2; |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 913 | if (f->f_fp == NULL) |
| 914 | return err_closed(); |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 915 | if (!PyArg_Parse(args, f->f_binary ? "s#" : "t#", &s, &n)) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 916 | return NULL; |
Guido van Rossum | eb183da | 1991-04-04 10:44:06 +0000 | [diff] [blame] | 917 | f->f_softspace = 0; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 918 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 919 | errno = 0; |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 920 | n2 = fwrite(s, 1, n, f->f_fp); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 921 | Py_END_ALLOW_THREADS |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 922 | if (n2 != n) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 923 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | febd551 | 1992-03-04 16:39:24 +0000 | [diff] [blame] | 924 | clearerr(f->f_fp); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 925 | return NULL; |
| 926 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 927 | Py_INCREF(Py_None); |
| 928 | return Py_None; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 929 | } |
| 930 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 931 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 932 | file_writelines(PyFileObject *f, PyObject *args) |
Guido van Rossum | 5a2a683 | 1993-10-25 09:59:04 +0000 | [diff] [blame] | 933 | { |
Guido van Rossum | ee70ad1 | 2000-03-13 16:27:06 +0000 | [diff] [blame] | 934 | #define CHUNKSIZE 1000 |
| 935 | PyObject *list, *line; |
| 936 | PyObject *result; |
| 937 | int i, j, index, len, nwritten, islist; |
| 938 | |
Guido van Rossum | 5a2a683 | 1993-10-25 09:59:04 +0000 | [diff] [blame] | 939 | if (f->f_fp == NULL) |
| 940 | return err_closed(); |
Guido van Rossum | ee70ad1 | 2000-03-13 16:27:06 +0000 | [diff] [blame] | 941 | if (args == NULL || !PySequence_Check(args)) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 942 | PyErr_SetString(PyExc_TypeError, |
Guido van Rossum | ee70ad1 | 2000-03-13 16:27:06 +0000 | [diff] [blame] | 943 | "writelines() requires sequence of strings"); |
Guido van Rossum | 5a2a683 | 1993-10-25 09:59:04 +0000 | [diff] [blame] | 944 | return NULL; |
| 945 | } |
Guido van Rossum | ee70ad1 | 2000-03-13 16:27:06 +0000 | [diff] [blame] | 946 | islist = PyList_Check(args); |
| 947 | |
| 948 | /* Strategy: slurp CHUNKSIZE lines into a private list, |
| 949 | checking that they are all strings, then write that list |
| 950 | without holding the interpreter lock, then come back for more. */ |
| 951 | index = 0; |
| 952 | if (islist) |
| 953 | list = NULL; |
| 954 | else { |
| 955 | list = PyList_New(CHUNKSIZE); |
| 956 | if (list == NULL) |
Guido van Rossum | 5a2a683 | 1993-10-25 09:59:04 +0000 | [diff] [blame] | 957 | return NULL; |
Guido van Rossum | 5a2a683 | 1993-10-25 09:59:04 +0000 | [diff] [blame] | 958 | } |
Guido van Rossum | ee70ad1 | 2000-03-13 16:27:06 +0000 | [diff] [blame] | 959 | result = NULL; |
| 960 | |
| 961 | for (;;) { |
| 962 | if (islist) { |
| 963 | Py_XDECREF(list); |
| 964 | list = PyList_GetSlice(args, index, index+CHUNKSIZE); |
| 965 | if (list == NULL) |
| 966 | return NULL; |
| 967 | j = PyList_GET_SIZE(list); |
| 968 | } |
| 969 | else { |
| 970 | for (j = 0; j < CHUNKSIZE; j++) { |
| 971 | line = PySequence_GetItem(args, index+j); |
| 972 | if (line == NULL) { |
| 973 | if (PyErr_ExceptionMatches( |
Marc-André Lemburg | 6ef68b5 | 2000-08-25 22:39:50 +0000 | [diff] [blame] | 974 | PyExc_IndexError)) { |
Guido van Rossum | ee70ad1 | 2000-03-13 16:27:06 +0000 | [diff] [blame] | 975 | PyErr_Clear(); |
| 976 | break; |
| 977 | } |
| 978 | /* Some other error occurred. |
| 979 | XXX We may lose some output. */ |
| 980 | goto error; |
| 981 | } |
Guido van Rossum | ee70ad1 | 2000-03-13 16:27:06 +0000 | [diff] [blame] | 982 | PyList_SetItem(list, j, line); |
| 983 | } |
| 984 | } |
| 985 | if (j == 0) |
| 986 | break; |
| 987 | |
Marc-André Lemburg | 6ef68b5 | 2000-08-25 22:39:50 +0000 | [diff] [blame] | 988 | /* Check that all entries are indeed strings. If not, |
| 989 | apply the same rules as for file.write() and |
| 990 | convert the results to strings. This is slow, but |
| 991 | seems to be the only way since all conversion APIs |
| 992 | could potentially execute Python code. */ |
| 993 | for (i = 0; i < j; i++) { |
| 994 | PyObject *v = PyList_GET_ITEM(list, i); |
| 995 | if (!PyString_Check(v)) { |
| 996 | const char *buffer; |
| 997 | int len; |
| 998 | if (((f->f_binary && |
| 999 | PyObject_AsReadBuffer(v, |
| 1000 | (const void**)&buffer, |
| 1001 | &len)) || |
| 1002 | PyObject_AsCharBuffer(v, |
| 1003 | &buffer, |
| 1004 | &len))) { |
| 1005 | PyErr_SetString(PyExc_TypeError, |
| 1006 | "writelines() requires sequences of strings"); |
| 1007 | goto error; |
| 1008 | } |
| 1009 | line = PyString_FromStringAndSize(buffer, |
| 1010 | len); |
| 1011 | if (line == NULL) |
| 1012 | goto error; |
| 1013 | Py_DECREF(v); |
Marc-André Lemburg | f5e96fa | 2000-08-25 22:49:05 +0000 | [diff] [blame] | 1014 | PyList_SET_ITEM(list, i, line); |
Marc-André Lemburg | 6ef68b5 | 2000-08-25 22:39:50 +0000 | [diff] [blame] | 1015 | } |
| 1016 | } |
| 1017 | |
| 1018 | /* Since we are releasing the global lock, the |
| 1019 | following code may *not* execute Python code. */ |
Guido van Rossum | ee70ad1 | 2000-03-13 16:27:06 +0000 | [diff] [blame] | 1020 | Py_BEGIN_ALLOW_THREADS |
| 1021 | f->f_softspace = 0; |
| 1022 | errno = 0; |
| 1023 | for (i = 0; i < j; i++) { |
Marc-André Lemburg | 6ef68b5 | 2000-08-25 22:39:50 +0000 | [diff] [blame] | 1024 | line = PyList_GET_ITEM(list, i); |
Guido van Rossum | ee70ad1 | 2000-03-13 16:27:06 +0000 | [diff] [blame] | 1025 | len = PyString_GET_SIZE(line); |
| 1026 | nwritten = fwrite(PyString_AS_STRING(line), |
| 1027 | 1, len, f->f_fp); |
| 1028 | if (nwritten != len) { |
| 1029 | Py_BLOCK_THREADS |
| 1030 | PyErr_SetFromErrno(PyExc_IOError); |
| 1031 | clearerr(f->f_fp); |
| 1032 | goto error; |
| 1033 | } |
| 1034 | } |
| 1035 | Py_END_ALLOW_THREADS |
| 1036 | |
| 1037 | if (j < CHUNKSIZE) |
| 1038 | break; |
| 1039 | index += CHUNKSIZE; |
| 1040 | } |
| 1041 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1042 | Py_INCREF(Py_None); |
Guido van Rossum | ee70ad1 | 2000-03-13 16:27:06 +0000 | [diff] [blame] | 1043 | result = Py_None; |
| 1044 | error: |
| 1045 | Py_XDECREF(list); |
| 1046 | return result; |
Guido van Rossum | 5a2a683 | 1993-10-25 09:59:04 +0000 | [diff] [blame] | 1047 | } |
| 1048 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1049 | static PyMethodDef file_methods[] = { |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 1050 | {"readline", (PyCFunction)file_readline, 1}, |
Guido van Rossum | 74ba247 | 1997-07-13 03:56:50 +0000 | [diff] [blame] | 1051 | {"read", (PyCFunction)file_read, 1}, |
| 1052 | {"write", (PyCFunction)file_write, 0}, |
| 1053 | {"fileno", (PyCFunction)file_fileno, 0}, |
Guido van Rossum | 8830319 | 1999-01-04 17:22:18 +0000 | [diff] [blame] | 1054 | {"seek", (PyCFunction)file_seek, 1}, |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 1055 | #ifdef HAVE_FTRUNCATE |
Guido van Rossum | 8830319 | 1999-01-04 17:22:18 +0000 | [diff] [blame] | 1056 | {"truncate", (PyCFunction)file_truncate, 1}, |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 1057 | #endif |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1058 | {"tell", (PyCFunction)file_tell, 0}, |
Guido van Rossum | fdf95dd | 1997-05-05 22:15:02 +0000 | [diff] [blame] | 1059 | {"readinto", (PyCFunction)file_readinto, 0}, |
Guido van Rossum | 74ba247 | 1997-07-13 03:56:50 +0000 | [diff] [blame] | 1060 | {"readlines", (PyCFunction)file_readlines, 1}, |
| 1061 | {"writelines", (PyCFunction)file_writelines, 0}, |
| 1062 | {"flush", (PyCFunction)file_flush, 0}, |
| 1063 | {"close", (PyCFunction)file_close, 0}, |
| 1064 | {"isatty", (PyCFunction)file_isatty, 0}, |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1065 | {NULL, NULL} /* sentinel */ |
| 1066 | }; |
| 1067 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1068 | #define OFF(x) offsetof(PyFileObject, x) |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1069 | |
| 1070 | static struct memberlist file_memberlist[] = { |
| 1071 | {"softspace", T_INT, OFF(f_softspace)}, |
| 1072 | {"mode", T_OBJECT, OFF(f_mode), RO}, |
| 1073 | {"name", T_OBJECT, OFF(f_name), RO}, |
| 1074 | /* getattr(f, "closed") is implemented without this table */ |
| 1075 | {"closed", T_INT, 0, RO}, |
| 1076 | {NULL} /* Sentinel */ |
| 1077 | }; |
| 1078 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1079 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 1080 | file_getattr(PyFileObject *f, char *name) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1081 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1082 | PyObject *res; |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1083 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1084 | res = Py_FindMethod(file_methods, (PyObject *)f, name); |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1085 | if (res != NULL) |
| 1086 | return res; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1087 | PyErr_Clear(); |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1088 | if (strcmp(name, "closed") == 0) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1089 | return PyInt_FromLong((long)(f->f_fp == 0)); |
| 1090 | return PyMember_Get((char *)f, file_memberlist, name); |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1091 | } |
| 1092 | |
| 1093 | static int |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 1094 | file_setattr(PyFileObject *f, char *name, PyObject *v) |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1095 | { |
| 1096 | if (v == NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1097 | PyErr_SetString(PyExc_AttributeError, |
| 1098 | "can't delete file attributes"); |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1099 | return -1; |
| 1100 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1101 | return PyMember_Set((char *)f, file_memberlist, name, v); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1102 | } |
| 1103 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1104 | PyTypeObject PyFile_Type = { |
| 1105 | PyObject_HEAD_INIT(&PyType_Type) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1106 | 0, |
| 1107 | "file", |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1108 | sizeof(PyFileObject), |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1109 | 0, |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1110 | (destructor)file_dealloc, /*tp_dealloc*/ |
Guido van Rossum | 7066dd7 | 1992-09-17 17:54:56 +0000 | [diff] [blame] | 1111 | 0, /*tp_print*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1112 | (getattrfunc)file_getattr, /*tp_getattr*/ |
| 1113 | (setattrfunc)file_setattr, /*tp_setattr*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1114 | 0, /*tp_compare*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1115 | (reprfunc)file_repr, /*tp_repr*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1116 | }; |
Guido van Rossum | eb183da | 1991-04-04 10:44:06 +0000 | [diff] [blame] | 1117 | |
| 1118 | /* Interface for the 'soft space' between print items. */ |
| 1119 | |
| 1120 | int |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 1121 | PyFile_SoftSpace(PyObject *f, int newflag) |
Guido van Rossum | eb183da | 1991-04-04 10:44:06 +0000 | [diff] [blame] | 1122 | { |
| 1123 | int oldflag = 0; |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1124 | if (f == NULL) { |
| 1125 | /* Do nothing */ |
| 1126 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1127 | else if (PyFile_Check(f)) { |
| 1128 | oldflag = ((PyFileObject *)f)->f_softspace; |
| 1129 | ((PyFileObject *)f)->f_softspace = newflag; |
Guido van Rossum | eb183da | 1991-04-04 10:44:06 +0000 | [diff] [blame] | 1130 | } |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1131 | else { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1132 | PyObject *v; |
| 1133 | v = PyObject_GetAttrString(f, "softspace"); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1134 | if (v == NULL) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1135 | PyErr_Clear(); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1136 | else { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1137 | if (PyInt_Check(v)) |
| 1138 | oldflag = PyInt_AsLong(v); |
| 1139 | Py_DECREF(v); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1140 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1141 | v = PyInt_FromLong((long)newflag); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1142 | if (v == NULL) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1143 | PyErr_Clear(); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1144 | else { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1145 | if (PyObject_SetAttrString(f, "softspace", v) != 0) |
| 1146 | PyErr_Clear(); |
| 1147 | Py_DECREF(v); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1148 | } |
| 1149 | } |
Guido van Rossum | eb183da | 1991-04-04 10:44:06 +0000 | [diff] [blame] | 1150 | return oldflag; |
| 1151 | } |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1152 | |
| 1153 | /* Interfaces to write objects/strings to file-like objects */ |
| 1154 | |
| 1155 | int |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 1156 | PyFile_WriteObject(PyObject *v, PyObject *f, int flags) |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1157 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1158 | PyObject *writer, *value, *args, *result; |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1159 | if (f == NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1160 | PyErr_SetString(PyExc_TypeError, "writeobject with NULL file"); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1161 | return -1; |
| 1162 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1163 | else if (PyFile_Check(f)) { |
| 1164 | FILE *fp = PyFile_AsFile(f); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1165 | if (fp == NULL) { |
| 1166 | err_closed(); |
| 1167 | return -1; |
| 1168 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1169 | return PyObject_Print(v, fp, flags); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1170 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1171 | writer = PyObject_GetAttrString(f, "write"); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1172 | if (writer == NULL) |
| 1173 | return -1; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1174 | if (flags & Py_PRINT_RAW) |
| 1175 | value = PyObject_Str(v); |
Guido van Rossum | c600411 | 1993-11-05 10:22:19 +0000 | [diff] [blame] | 1176 | else |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1177 | value = PyObject_Repr(v); |
Guido van Rossum | c600411 | 1993-11-05 10:22:19 +0000 | [diff] [blame] | 1178 | if (value == NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1179 | Py_DECREF(writer); |
Guido van Rossum | c600411 | 1993-11-05 10:22:19 +0000 | [diff] [blame] | 1180 | return -1; |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1181 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1182 | args = Py_BuildValue("(O)", value); |
Guido van Rossum | e9eec54 | 1997-05-22 14:02:25 +0000 | [diff] [blame] | 1183 | if (args == NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1184 | Py_DECREF(value); |
| 1185 | Py_DECREF(writer); |
Guido van Rossum | d3f9a1a | 1995-07-10 23:32:26 +0000 | [diff] [blame] | 1186 | return -1; |
| 1187 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1188 | result = PyEval_CallObject(writer, args); |
| 1189 | Py_DECREF(args); |
| 1190 | Py_DECREF(value); |
| 1191 | Py_DECREF(writer); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1192 | if (result == NULL) |
| 1193 | return -1; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1194 | Py_DECREF(result); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1195 | return 0; |
| 1196 | } |
| 1197 | |
Guido van Rossum | 27a60b1 | 1997-05-22 22:25:11 +0000 | [diff] [blame] | 1198 | int |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 1199 | PyFile_WriteString(char *s, PyObject *f) |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1200 | { |
| 1201 | if (f == NULL) { |
Guido van Rossum | 27a60b1 | 1997-05-22 22:25:11 +0000 | [diff] [blame] | 1202 | /* Should be caused by a pre-existing error */ |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 1203 | if (!PyErr_Occurred()) |
Guido van Rossum | 27a60b1 | 1997-05-22 22:25:11 +0000 | [diff] [blame] | 1204 | PyErr_SetString(PyExc_SystemError, |
| 1205 | "null file for PyFile_WriteString"); |
| 1206 | return -1; |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1207 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1208 | else if (PyFile_Check(f)) { |
| 1209 | FILE *fp = PyFile_AsFile(f); |
Guido van Rossum | 27a60b1 | 1997-05-22 22:25:11 +0000 | [diff] [blame] | 1210 | if (fp == NULL) { |
| 1211 | err_closed(); |
| 1212 | return -1; |
| 1213 | } |
| 1214 | fputs(s, fp); |
| 1215 | return 0; |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1216 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1217 | else if (!PyErr_Occurred()) { |
| 1218 | PyObject *v = PyString_FromString(s); |
Guido van Rossum | 27a60b1 | 1997-05-22 22:25:11 +0000 | [diff] [blame] | 1219 | int err; |
| 1220 | if (v == NULL) |
| 1221 | return -1; |
| 1222 | err = PyFile_WriteObject(v, f, Py_PRINT_RAW); |
| 1223 | Py_DECREF(v); |
| 1224 | return err; |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1225 | } |
Guido van Rossum | 74ba247 | 1997-07-13 03:56:50 +0000 | [diff] [blame] | 1226 | else |
| 1227 | return -1; |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1228 | } |
Andrew M. Kuchling | 06051ed | 2000-07-13 23:56:54 +0000 | [diff] [blame] | 1229 | |
| 1230 | /* Try to get a file-descriptor from a Python object. If the object |
| 1231 | is an integer or long integer, its value is returned. If not, the |
| 1232 | object's fileno() method is called if it exists; the method must return |
| 1233 | an integer or long integer, which is returned as the file descriptor value. |
| 1234 | -1 is returned on failure. |
| 1235 | */ |
| 1236 | |
| 1237 | int PyObject_AsFileDescriptor(PyObject *o) |
| 1238 | { |
| 1239 | int fd; |
| 1240 | PyObject *meth; |
| 1241 | |
| 1242 | if (PyInt_Check(o)) { |
| 1243 | fd = PyInt_AsLong(o); |
| 1244 | } |
| 1245 | else if (PyLong_Check(o)) { |
| 1246 | fd = PyLong_AsLong(o); |
| 1247 | } |
| 1248 | else if ((meth = PyObject_GetAttrString(o, "fileno")) != NULL) |
| 1249 | { |
| 1250 | PyObject *fno = PyEval_CallObject(meth, NULL); |
| 1251 | Py_DECREF(meth); |
| 1252 | if (fno == NULL) |
| 1253 | return -1; |
| 1254 | |
| 1255 | if (PyInt_Check(fno)) { |
| 1256 | fd = PyInt_AsLong(fno); |
| 1257 | Py_DECREF(fno); |
| 1258 | } |
| 1259 | else if (PyLong_Check(fno)) { |
| 1260 | fd = PyLong_AsLong(fno); |
| 1261 | Py_DECREF(fno); |
| 1262 | } |
| 1263 | else { |
| 1264 | PyErr_SetString(PyExc_TypeError, |
| 1265 | "fileno() returned a non-integer"); |
| 1266 | Py_DECREF(fno); |
| 1267 | return -1; |
| 1268 | } |
| 1269 | } |
| 1270 | else { |
| 1271 | PyErr_SetString(PyExc_TypeError, |
| 1272 | "argument must be an int, or have a fileno() method."); |
| 1273 | return -1; |
| 1274 | } |
| 1275 | |
| 1276 | if (fd < 0) { |
| 1277 | PyErr_Format(PyExc_ValueError, |
| 1278 | "file descriptor cannot be a negative integer (%i)", |
| 1279 | fd); |
| 1280 | return -1; |
| 1281 | } |
| 1282 | return fd; |
| 1283 | } |
| 1284 | |
| 1285 | |
| 1286 | |