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 | |
Guido van Rossum | ff7e83d | 1999-08-27 20:39:37 +0000 | [diff] [blame] | 7 | #ifndef DONT_HAVE_SYS_TYPES_H |
Guido van Rossum | 4149843 | 1999-01-07 22:09:51 +0000 | [diff] [blame] | 8 | #include <sys/types.h> |
Guido van Rossum | ff7e83d | 1999-08-27 20:39:37 +0000 | [diff] [blame] | 9 | #endif /* DONT_HAVE_SYS_TYPES_H */ |
Guido van Rossum | 4149843 | 1999-01-07 22:09:51 +0000 | [diff] [blame] | 10 | |
Guido van Rossum | eceebb8 | 2000-06-28 20:57:07 +0000 | [diff] [blame] | 11 | /* We expect that fstat exists on most systems. |
| 12 | It's confirmed on Unix, Mac and Windows. |
| 13 | If you don't have it, add #define DONT_HAVE_FSTAT to your config.h. */ |
| 14 | #ifndef DONT_HAVE_FSTAT |
| 15 | #define HAVE_FSTAT |
| 16 | |
| 17 | #ifndef DONT_HAVE_SYS_TYPES_H |
| 18 | #include <sys/types.h> |
| 19 | #endif |
| 20 | |
| 21 | #ifndef DONT_HAVE_SYS_STAT_H |
| 22 | #include <sys/stat.h> |
| 23 | #else |
| 24 | #ifdef HAVE_STAT_H |
| 25 | #include <stat.h> |
| 26 | #endif |
| 27 | #endif |
| 28 | |
| 29 | #endif /* DONT_HAVE_FSTAT */ |
| 30 | |
Guido van Rossum | 685a38e | 1996-12-05 21:54:17 +0000 | [diff] [blame] | 31 | #ifdef HAVE_UNISTD_H |
| 32 | #include <unistd.h> |
| 33 | #endif |
| 34 | |
Guido van Rossum | b819914 | 1997-05-06 15:23:24 +0000 | [diff] [blame] | 35 | #ifdef MS_WIN32 |
Guido van Rossum | b819914 | 1997-05-06 15:23:24 +0000 | [diff] [blame] | 36 | #define fileno _fileno |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 37 | /* can (almost fully) duplicate with _chsize, see file_truncate */ |
Guido van Rossum | b819914 | 1997-05-06 15:23:24 +0000 | [diff] [blame] | 38 | #define HAVE_FTRUNCATE |
| 39 | #endif |
| 40 | |
Guido van Rossum | f2044e1 | 1998-04-28 16:05:59 +0000 | [diff] [blame] | 41 | #ifdef macintosh |
| 42 | #ifdef USE_GUSI |
| 43 | #define HAVE_FTRUNCATE |
| 44 | #endif |
| 45 | #endif |
| 46 | |
Jack Jansen | e08dea19 | 1995-04-23 22:12:47 +0000 | [diff] [blame] | 47 | #ifdef __MWERKS__ |
| 48 | /* Mwerks fopen() doesn't always set errno */ |
| 49 | #define NO_FOPEN_ERRNO |
| 50 | #endif |
Guido van Rossum | 295d171 | 1995-02-19 15:55:19 +0000 | [diff] [blame] | 51 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 52 | #define BUF(v) PyString_AS_STRING((PyStringObject *)v) |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 53 | |
Guido van Rossum | ff7e83d | 1999-08-27 20:39:37 +0000 | [diff] [blame] | 54 | #ifndef DONT_HAVE_ERRNO_H |
Guido van Rossum | f1dc566 | 1993-07-05 10:31:29 +0000 | [diff] [blame] | 55 | #include <errno.h> |
Guido van Rossum | ff7e83d | 1999-08-27 20:39:37 +0000 | [diff] [blame] | 56 | #endif |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 57 | |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 58 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 59 | typedef struct { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 60 | PyObject_HEAD |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 61 | FILE *f_fp; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 62 | PyObject *f_name; |
| 63 | PyObject *f_mode; |
Tim Peters | dbd9ba6 | 2000-07-09 03:09:57 +0000 | [diff] [blame] | 64 | int (*f_close)(FILE *); |
Guido van Rossum | eb183da | 1991-04-04 10:44:06 +0000 | [diff] [blame] | 65 | int f_softspace; /* Flag used by 'print' command */ |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 66 | int f_binary; /* Flag which indicates whether the file is open |
| 67 | open in binary (1) or test (0) mode */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 68 | } PyFileObject; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 69 | |
| 70 | FILE * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 71 | PyFile_AsFile(PyObject *f) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 72 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 73 | if (f == NULL || !PyFile_Check(f)) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 74 | return NULL; |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 75 | else |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 76 | return ((PyFileObject *)f)->f_fp; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 77 | } |
| 78 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 79 | PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 80 | PyFile_Name(PyObject *f) |
Guido van Rossum | db3165e | 1993-10-18 17:06:59 +0000 | [diff] [blame] | 81 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 82 | if (f == NULL || !PyFile_Check(f)) |
Guido van Rossum | db3165e | 1993-10-18 17:06:59 +0000 | [diff] [blame] | 83 | return NULL; |
| 84 | else |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 85 | return ((PyFileObject *)f)->f_name; |
Guido van Rossum | db3165e | 1993-10-18 17:06:59 +0000 | [diff] [blame] | 86 | } |
| 87 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 88 | PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 89 | PyFile_FromFile(FILE *fp, char *name, char *mode, int (*close)(FILE *)) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 90 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 91 | PyFileObject *f = PyObject_NEW(PyFileObject, &PyFile_Type); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 92 | if (f == NULL) |
| 93 | return NULL; |
| 94 | f->f_fp = NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 95 | f->f_name = PyString_FromString(name); |
| 96 | f->f_mode = PyString_FromString(mode); |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 97 | f->f_close = close; |
Guido van Rossum | eb183da | 1991-04-04 10:44:06 +0000 | [diff] [blame] | 98 | f->f_softspace = 0; |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 99 | if (strchr(mode,'b') != NULL) |
| 100 | f->f_binary = 1; |
| 101 | else |
| 102 | f->f_binary = 0; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 103 | if (f->f_name == NULL || f->f_mode == NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 104 | Py_DECREF(f); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 105 | return NULL; |
| 106 | } |
| 107 | f->f_fp = fp; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 108 | return (PyObject *) f; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 109 | } |
| 110 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 111 | PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 112 | PyFile_FromString(char *name, char *mode) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 113 | { |
Tim Peters | dbd9ba6 | 2000-07-09 03:09:57 +0000 | [diff] [blame] | 114 | extern int fclose(FILE *); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 115 | PyFileObject *f; |
| 116 | f = (PyFileObject *) PyFile_FromFile((FILE *)NULL, name, mode, fclose); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 117 | if (f == NULL) |
| 118 | return NULL; |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 119 | #ifdef HAVE_FOPENRF |
Guido van Rossum | a08095a | 1991-02-13 23:25:27 +0000 | [diff] [blame] | 120 | if (*mode == '*') { |
| 121 | FILE *fopenRF(); |
| 122 | f->f_fp = fopenRF(name, mode+1); |
| 123 | } |
| 124 | else |
| 125 | #endif |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 126 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 127 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 128 | f->f_fp = fopen(name, mode); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 129 | Py_END_ALLOW_THREADS |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 130 | } |
Guido van Rossum | a08095a | 1991-02-13 23:25:27 +0000 | [diff] [blame] | 131 | if (f->f_fp == NULL) { |
Jack Jansen | e08dea19 | 1995-04-23 22:12:47 +0000 | [diff] [blame] | 132 | #ifdef NO_FOPEN_ERRNO |
Barry Warsaw | 52ddc0e | 1998-07-23 16:07:02 +0000 | [diff] [blame] | 133 | /* Metroworks only, not testable, so unchanged */ |
Jack Jansen | e08dea19 | 1995-04-23 22:12:47 +0000 | [diff] [blame] | 134 | if ( errno == 0 ) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 135 | PyErr_SetString(PyExc_IOError, "Cannot open file"); |
| 136 | Py_DECREF(f); |
Jack Jansen | e08dea19 | 1995-04-23 22:12:47 +0000 | [diff] [blame] | 137 | return NULL; |
| 138 | } |
| 139 | #endif |
Barry Warsaw | 52ddc0e | 1998-07-23 16:07:02 +0000 | [diff] [blame] | 140 | PyErr_SetFromErrnoWithFilename(PyExc_IOError, name); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 141 | Py_DECREF(f); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 142 | return NULL; |
| 143 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 144 | return (PyObject *)f; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 145 | } |
| 146 | |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 147 | void |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 148 | PyFile_SetBufSize(PyObject *f, int bufsize) |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 149 | { |
| 150 | if (bufsize >= 0) { |
| 151 | #ifdef HAVE_SETVBUF |
| 152 | int type; |
| 153 | switch (bufsize) { |
| 154 | case 0: |
| 155 | type = _IONBF; |
| 156 | break; |
| 157 | case 1: |
| 158 | type = _IOLBF; |
| 159 | bufsize = BUFSIZ; |
| 160 | break; |
| 161 | default: |
| 162 | type = _IOFBF; |
| 163 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 164 | setvbuf(((PyFileObject *)f)->f_fp, (char *)NULL, |
| 165 | type, bufsize); |
Guido van Rossum | f8b4de0 | 1998-03-06 15:32:40 +0000 | [diff] [blame] | 166 | #else /* !HAVE_SETVBUF */ |
| 167 | if (bufsize <= 1) |
| 168 | setbuf(((PyFileObject *)f)->f_fp, (char *)NULL); |
| 169 | #endif /* !HAVE_SETVBUF */ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 170 | } |
| 171 | } |
| 172 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 173 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 174 | err_closed(void) |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 175 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 176 | PyErr_SetString(PyExc_ValueError, "I/O operation on closed file"); |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 177 | return NULL; |
| 178 | } |
| 179 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 180 | /* Methods */ |
| 181 | |
| 182 | static void |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 183 | file_dealloc(PyFileObject *f) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 184 | { |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 185 | if (f->f_fp != NULL && f->f_close != NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 186 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 187 | (*f->f_close)(f->f_fp); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 188 | Py_END_ALLOW_THREADS |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 189 | } |
Guido van Rossum | 1109fbc | 1998-04-10 22:16:39 +0000 | [diff] [blame] | 190 | if (f->f_name != NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 191 | Py_DECREF(f->f_name); |
Guido van Rossum | 1109fbc | 1998-04-10 22:16:39 +0000 | [diff] [blame] | 192 | } |
| 193 | if (f->f_mode != NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 194 | Py_DECREF(f->f_mode); |
Guido van Rossum | 1109fbc | 1998-04-10 22:16:39 +0000 | [diff] [blame] | 195 | } |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 196 | PyObject_DEL(f); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 197 | } |
| 198 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 199 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 200 | file_repr(PyFileObject *f) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 201 | { |
| 202 | char buf[300]; |
Fred Drake | a44d353 | 2000-06-30 15:01:00 +0000 | [diff] [blame] | 203 | sprintf(buf, "<%s file '%.256s', mode '%.10s' at %p>", |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 204 | f->f_fp == NULL ? "closed" : "open", |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 205 | PyString_AsString(f->f_name), |
| 206 | PyString_AsString(f->f_mode), |
Fred Drake | a44d353 | 2000-06-30 15:01:00 +0000 | [diff] [blame] | 207 | f); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 208 | return PyString_FromString(buf); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 209 | } |
| 210 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 211 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 212 | file_close(PyFileObject *f, PyObject *args) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 213 | { |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 214 | int sts = 0; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 215 | if (!PyArg_NoArgs(args)) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 216 | return NULL; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 217 | if (f->f_fp != NULL) { |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 218 | if (f->f_close != NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 219 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 220 | errno = 0; |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 221 | sts = (*f->f_close)(f->f_fp); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 222 | Py_END_ALLOW_THREADS |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 223 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 224 | f->f_fp = NULL; |
| 225 | } |
Guido van Rossum | febd551 | 1992-03-04 16:39:24 +0000 | [diff] [blame] | 226 | if (sts == EOF) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 227 | return PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 228 | if (sts != 0) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 229 | return PyInt_FromLong((long)sts); |
| 230 | Py_INCREF(Py_None); |
| 231 | return Py_None; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 232 | } |
| 233 | |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 234 | |
| 235 | /* a portable fseek() function |
| 236 | return 0 on success, non-zero on failure (with errno set) */ |
| 237 | int |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 238 | #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] | 239 | _portable_fseek(FILE *fp, fpos_t offset, int whence) |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 240 | #else |
Fred Drake | 8ce159a | 2000-08-31 05:18:54 +0000 | [diff] [blame] | 241 | _portable_fseek(FILE *fp, off_t offset, int whence) |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 242 | #endif |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 243 | { |
| 244 | #if defined(HAVE_FSEEKO) |
| 245 | return fseeko(fp, offset, whence); |
| 246 | #elif defined(HAVE_FSEEK64) |
| 247 | return fseek64(fp, offset, whence); |
Fred Drake | db810ac | 2000-10-06 20:42:33 +0000 | [diff] [blame] | 248 | #elif defined(__BEOS__) |
| 249 | return _fseek(fp, offset, whence); |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 250 | #elif defined(HAVE_LARGEFILE_SUPPORT) && SIZEOF_FPOS_T >= 8 |
Guido van Rossum | e54e0be | 2001-01-16 20:53:31 +0000 | [diff] [blame^] | 251 | /* lacking a 64-bit capable fseek(), use a 64-bit capable fsetpos() |
| 252 | and fgetpos() to implement fseek()*/ |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 253 | fpos_t pos; |
| 254 | switch (whence) { |
Guido van Rossum | e54e0be | 2001-01-16 20:53:31 +0000 | [diff] [blame^] | 255 | case SEEK_END: |
| 256 | if (fseek(fp, 0, SEEK_END) != 0) |
| 257 | return -1; |
| 258 | /* fall through */ |
| 259 | case SEEK_CUR: |
| 260 | if (fgetpos(fp, &pos) != 0) |
| 261 | return -1; |
| 262 | offset += pos; |
| 263 | break; |
| 264 | /* case SEEK_SET: break; */ |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 265 | } |
| 266 | return fsetpos(fp, &offset); |
| 267 | #else |
| 268 | return fseek(fp, offset, whence); |
| 269 | #endif |
| 270 | } |
| 271 | |
| 272 | |
| 273 | /* a portable ftell() function |
| 274 | Return -1 on failure with errno set appropriately, current file |
| 275 | position on success */ |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 276 | #if defined(HAVE_LARGEFILE_SUPPORT) && SIZEOF_OFF_T < 8 && SIZEOF_FPOS_T >= 8 |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 277 | fpos_t |
| 278 | #else |
| 279 | off_t |
| 280 | #endif |
Fred Drake | 8ce159a | 2000-08-31 05:18:54 +0000 | [diff] [blame] | 281 | _portable_ftell(FILE* fp) |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 282 | { |
| 283 | #if defined(HAVE_FTELLO) && defined(HAVE_LARGEFILE_SUPPORT) |
| 284 | return ftello(fp); |
| 285 | #elif defined(HAVE_FTELL64) && defined(HAVE_LARGEFILE_SUPPORT) |
| 286 | return ftell64(fp); |
| 287 | #elif SIZEOF_FPOS_T >= 8 && defined(HAVE_LARGEFILE_SUPPORT) |
| 288 | fpos_t pos; |
| 289 | if (fgetpos(fp, &pos) != 0) |
| 290 | return -1; |
| 291 | return pos; |
| 292 | #else |
| 293 | return ftell(fp); |
| 294 | #endif |
| 295 | } |
| 296 | |
| 297 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 298 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 299 | file_seek(PyFileObject *f, PyObject *args) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 300 | { |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 301 | int whence; |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 302 | int ret; |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 303 | #if defined(HAVE_LARGEFILE_SUPPORT) && SIZEOF_OFF_T < 8 && SIZEOF_FPOS_T >= 8 |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 304 | fpos_t offset, pos; |
| 305 | #else |
Guido van Rossum | 3c9fe0c | 1999-01-06 18:51:17 +0000 | [diff] [blame] | 306 | off_t offset; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 307 | #endif /* !MS_WIN64 */ |
Guido van Rossum | 3c9fe0c | 1999-01-06 18:51:17 +0000 | [diff] [blame] | 308 | PyObject *offobj; |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 309 | |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 310 | if (f->f_fp == NULL) |
| 311 | return err_closed(); |
| 312 | whence = 0; |
Guido van Rossum | 43713e5 | 2000-02-29 13:59:29 +0000 | [diff] [blame] | 313 | if (!PyArg_ParseTuple(args, "O|i:seek", &offobj, &whence)) |
Guido van Rossum | 3c9fe0c | 1999-01-06 18:51:17 +0000 | [diff] [blame] | 314 | return NULL; |
| 315 | #if !defined(HAVE_LARGEFILE_SUPPORT) |
| 316 | offset = PyInt_AsLong(offobj); |
| 317 | #else |
| 318 | offset = PyLong_Check(offobj) ? |
| 319 | PyLong_AsLongLong(offobj) : PyInt_AsLong(offobj); |
| 320 | #endif |
| 321 | if (PyErr_Occurred()) |
Guido van Rossum | 8830319 | 1999-01-04 17:22:18 +0000 | [diff] [blame] | 322 | return NULL; |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 323 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 324 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 325 | errno = 0; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 326 | ret = _portable_fseek(f->f_fp, offset, whence); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 327 | Py_END_ALLOW_THREADS |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 328 | |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 329 | if (ret != 0) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 330 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | febd551 | 1992-03-04 16:39:24 +0000 | [diff] [blame] | 331 | clearerr(f->f_fp); |
| 332 | return NULL; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 333 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 334 | Py_INCREF(Py_None); |
| 335 | return Py_None; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 336 | } |
| 337 | |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 338 | |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 339 | #ifdef HAVE_FTRUNCATE |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 340 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 341 | file_truncate(PyFileObject *f, PyObject *args) |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 342 | { |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 343 | int ret; |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 344 | #if defined(HAVE_LARGEFILE_SUPPORT) && SIZEOF_OFF_T < 8 && SIZEOF_FPOS_T >= 8 |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 345 | fpos_t newsize; |
| 346 | #else |
Guido van Rossum | 3c9fe0c | 1999-01-06 18:51:17 +0000 | [diff] [blame] | 347 | off_t newsize; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 348 | #endif |
Guido van Rossum | 3c9fe0c | 1999-01-06 18:51:17 +0000 | [diff] [blame] | 349 | PyObject *newsizeobj; |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 350 | |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 351 | if (f->f_fp == NULL) |
| 352 | return err_closed(); |
Guido van Rossum | 3c9fe0c | 1999-01-06 18:51:17 +0000 | [diff] [blame] | 353 | newsizeobj = NULL; |
Guido van Rossum | 43713e5 | 2000-02-29 13:59:29 +0000 | [diff] [blame] | 354 | if (!PyArg_ParseTuple(args, "|O:truncate", &newsizeobj)) |
Guido van Rossum | 8830319 | 1999-01-04 17:22:18 +0000 | [diff] [blame] | 355 | return NULL; |
Guido van Rossum | 3c9fe0c | 1999-01-06 18:51:17 +0000 | [diff] [blame] | 356 | if (newsizeobj != NULL) { |
| 357 | #if !defined(HAVE_LARGEFILE_SUPPORT) |
| 358 | newsize = PyInt_AsLong(newsizeobj); |
| 359 | #else |
| 360 | newsize = PyLong_Check(newsizeobj) ? |
| 361 | PyLong_AsLongLong(newsizeobj) : |
| 362 | PyInt_AsLong(newsizeobj); |
| 363 | #endif |
| 364 | if (PyErr_Occurred()) |
| 365 | return NULL; |
| 366 | } else { |
| 367 | /* Default to current position*/ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 368 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 369 | errno = 0; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 370 | newsize = _portable_ftell(f->f_fp); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 371 | Py_END_ALLOW_THREADS |
Guido van Rossum | 3c9fe0c | 1999-01-06 18:51:17 +0000 | [diff] [blame] | 372 | if (newsize == -1) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 373 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 374 | clearerr(f->f_fp); |
| 375 | return NULL; |
| 376 | } |
| 377 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 378 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 379 | errno = 0; |
| 380 | ret = fflush(f->f_fp); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 381 | Py_END_ALLOW_THREADS |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 382 | if (ret != 0) goto onioerror; |
| 383 | |
| 384 | #ifdef MS_WIN32 |
| 385 | /* can use _chsize; if, however, the newsize overflows 32-bits then |
| 386 | _chsize is *not* adequate; in this case, an OverflowError is raised */ |
| 387 | if (newsize > LONG_MAX) { |
| 388 | PyErr_SetString(PyExc_OverflowError, |
| 389 | "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] | 390 | return NULL; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 391 | } else { |
| 392 | Py_BEGIN_ALLOW_THREADS |
| 393 | errno = 0; |
| 394 | ret = _chsize(fileno(f->f_fp), newsize); |
| 395 | Py_END_ALLOW_THREADS |
| 396 | if (ret != 0) goto onioerror; |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 397 | } |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 398 | #else |
| 399 | Py_BEGIN_ALLOW_THREADS |
| 400 | errno = 0; |
| 401 | ret = ftruncate(fileno(f->f_fp), newsize); |
| 402 | Py_END_ALLOW_THREADS |
| 403 | if (ret != 0) goto onioerror; |
| 404 | #endif /* !MS_WIN32 */ |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 405 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 406 | Py_INCREF(Py_None); |
| 407 | return Py_None; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 408 | |
| 409 | onioerror: |
| 410 | PyErr_SetFromErrno(PyExc_IOError); |
| 411 | clearerr(f->f_fp); |
| 412 | return NULL; |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 413 | } |
| 414 | #endif /* HAVE_FTRUNCATE */ |
| 415 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 416 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 417 | file_tell(PyFileObject *f, PyObject *args) |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 418 | { |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 419 | #if defined(HAVE_LARGEFILE_SUPPORT) && SIZEOF_OFF_T < 8 && SIZEOF_FPOS_T >= 8 |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 420 | fpos_t pos; |
| 421 | #else |
| 422 | off_t pos; |
| 423 | #endif |
| 424 | |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 425 | if (f->f_fp == NULL) |
| 426 | return err_closed(); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 427 | if (!PyArg_NoArgs(args)) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 428 | return NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 429 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 430 | errno = 0; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 431 | pos = _portable_ftell(f->f_fp); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 432 | Py_END_ALLOW_THREADS |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 433 | if (pos == -1) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 434 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | febd551 | 1992-03-04 16:39:24 +0000 | [diff] [blame] | 435 | clearerr(f->f_fp); |
| 436 | return NULL; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 437 | } |
Guido van Rossum | 3c9fe0c | 1999-01-06 18:51:17 +0000 | [diff] [blame] | 438 | #if !defined(HAVE_LARGEFILE_SUPPORT) |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 439 | return PyInt_FromLong(pos); |
Guido van Rossum | 3c9fe0c | 1999-01-06 18:51:17 +0000 | [diff] [blame] | 440 | #else |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 441 | return PyLong_FromLongLong(pos); |
Guido van Rossum | 3c9fe0c | 1999-01-06 18:51:17 +0000 | [diff] [blame] | 442 | #endif |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 443 | } |
| 444 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 445 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 446 | file_fileno(PyFileObject *f, PyObject *args) |
Guido van Rossum | ed233a5 | 1992-06-23 09:07:03 +0000 | [diff] [blame] | 447 | { |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 448 | if (f->f_fp == NULL) |
| 449 | return err_closed(); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 450 | if (!PyArg_NoArgs(args)) |
Guido van Rossum | ed233a5 | 1992-06-23 09:07:03 +0000 | [diff] [blame] | 451 | return NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 452 | return PyInt_FromLong((long) fileno(f->f_fp)); |
Guido van Rossum | ed233a5 | 1992-06-23 09:07:03 +0000 | [diff] [blame] | 453 | } |
| 454 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 455 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 456 | file_flush(PyFileObject *f, PyObject *args) |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 457 | { |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 458 | int res; |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 459 | |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 460 | if (f->f_fp == NULL) |
| 461 | return err_closed(); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 462 | if (!PyArg_NoArgs(args)) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 463 | return NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 464 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 465 | errno = 0; |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 466 | res = fflush(f->f_fp); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 467 | Py_END_ALLOW_THREADS |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 468 | if (res != 0) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 469 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | febd551 | 1992-03-04 16:39:24 +0000 | [diff] [blame] | 470 | clearerr(f->f_fp); |
| 471 | return NULL; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 472 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 473 | Py_INCREF(Py_None); |
| 474 | return Py_None; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 475 | } |
| 476 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 477 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 478 | file_isatty(PyFileObject *f, PyObject *args) |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 479 | { |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 480 | long res; |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 481 | if (f->f_fp == NULL) |
| 482 | return err_closed(); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 483 | if (!PyArg_NoArgs(args)) |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 484 | return NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 485 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 486 | res = isatty((int)fileno(f->f_fp)); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 487 | Py_END_ALLOW_THREADS |
| 488 | return PyInt_FromLong(res); |
Guido van Rossum | a1ab7fa | 1991-06-04 19:37:39 +0000 | [diff] [blame] | 489 | } |
| 490 | |
Guido van Rossum | ff7e83d | 1999-08-27 20:39:37 +0000 | [diff] [blame] | 491 | |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 492 | #if BUFSIZ < 8192 |
| 493 | #define SMALLCHUNK 8192 |
| 494 | #else |
| 495 | #define SMALLCHUNK BUFSIZ |
| 496 | #endif |
| 497 | |
Guido van Rossum | 3c25904 | 1999-01-14 19:00:14 +0000 | [diff] [blame] | 498 | #if SIZEOF_INT < 4 |
| 499 | #define BIGCHUNK (512 * 32) |
| 500 | #else |
| 501 | #define BIGCHUNK (512 * 1024) |
| 502 | #endif |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 503 | |
| 504 | static size_t |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 505 | new_buffersize(PyFileObject *f, size_t currentsize) |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 506 | { |
| 507 | #ifdef HAVE_FSTAT |
| 508 | long pos, end; |
| 509 | struct stat st; |
| 510 | if (fstat(fileno(f->f_fp), &st) == 0) { |
| 511 | end = st.st_size; |
Guido van Rossum | cada293 | 1998-12-11 20:44:56 +0000 | [diff] [blame] | 512 | /* The following is not a bug: we really need to call lseek() |
| 513 | *and* ftell(). The reason is that some stdio libraries |
| 514 | mistakenly flush their buffer when ftell() is called and |
| 515 | the lseek() call it makes fails, thereby throwing away |
| 516 | data that cannot be recovered in any way. To avoid this, |
| 517 | we first test lseek(), and only call ftell() if lseek() |
| 518 | works. We can't use the lseek() value either, because we |
| 519 | need to take the amount of buffered data into account. |
| 520 | (Yet another reason why stdio stinks. :-) */ |
Guido van Rossum | 91aaa92 | 1998-05-05 22:21:35 +0000 | [diff] [blame] | 521 | pos = lseek(fileno(f->f_fp), 0L, SEEK_CUR); |
| 522 | if (pos >= 0) |
| 523 | pos = ftell(f->f_fp); |
Guido van Rossum | d30dc0a | 1998-04-27 19:01:08 +0000 | [diff] [blame] | 524 | if (pos < 0) |
| 525 | clearerr(f->f_fp); |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 526 | if (end > pos && pos >= 0) |
Guido van Rossum | cada293 | 1998-12-11 20:44:56 +0000 | [diff] [blame] | 527 | return currentsize + end - pos + 1; |
Guido van Rossum | dcb5e7f | 1998-03-03 22:36:10 +0000 | [diff] [blame] | 528 | /* 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] | 529 | } |
| 530 | #endif |
| 531 | if (currentsize > SMALLCHUNK) { |
| 532 | /* Keep doubling until we reach BIGCHUNK; |
| 533 | then keep adding BIGCHUNK. */ |
| 534 | if (currentsize <= BIGCHUNK) |
| 535 | return currentsize + currentsize; |
| 536 | else |
| 537 | return currentsize + BIGCHUNK; |
| 538 | } |
| 539 | return currentsize + SMALLCHUNK; |
| 540 | } |
| 541 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 542 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 543 | file_read(PyFileObject *f, PyObject *args) |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 544 | { |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 545 | long bytesrequested = -1; |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 546 | size_t bytesread, buffersize, chunksize; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 547 | PyObject *v; |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 548 | |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 549 | if (f->f_fp == NULL) |
| 550 | return err_closed(); |
Guido van Rossum | 43713e5 | 2000-02-29 13:59:29 +0000 | [diff] [blame] | 551 | if (!PyArg_ParseTuple(args, "|l:read", &bytesrequested)) |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 552 | return NULL; |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 553 | if (bytesrequested < 0) |
Guido van Rossum | ff1ccbf | 1999-04-10 15:48:23 +0000 | [diff] [blame] | 554 | buffersize = new_buffersize(f, (size_t)0); |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 555 | else |
| 556 | buffersize = bytesrequested; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 557 | if (buffersize > INT_MAX) { |
| 558 | PyErr_SetString(PyExc_OverflowError, |
| 559 | "requested number of bytes is more than a Python string can hold"); |
| 560 | return NULL; |
| 561 | } |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 562 | v = PyString_FromStringAndSize((char *)NULL, buffersize); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 563 | if (v == NULL) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 564 | return NULL; |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 565 | bytesread = 0; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 566 | for (;;) { |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 567 | Py_BEGIN_ALLOW_THREADS |
| 568 | errno = 0; |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 569 | chunksize = fread(BUF(v) + bytesread, 1, |
| 570 | buffersize - bytesread, f->f_fp); |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 571 | Py_END_ALLOW_THREADS |
| 572 | if (chunksize == 0) { |
| 573 | if (!ferror(f->f_fp)) |
| 574 | break; |
| 575 | PyErr_SetFromErrno(PyExc_IOError); |
| 576 | clearerr(f->f_fp); |
| 577 | Py_DECREF(v); |
| 578 | return NULL; |
| 579 | } |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 580 | bytesread += chunksize; |
| 581 | if (bytesread < buffersize) |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 582 | break; |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 583 | if (bytesrequested < 0) { |
Guido van Rossum | cada293 | 1998-12-11 20:44:56 +0000 | [diff] [blame] | 584 | buffersize = new_buffersize(f, buffersize); |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 585 | if (_PyString_Resize(&v, buffersize) < 0) |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 586 | return NULL; |
| 587 | } |
| 588 | } |
Guido van Rossum | 5449b6e | 1997-05-09 22:27:31 +0000 | [diff] [blame] | 589 | if (bytesread != buffersize) |
| 590 | _PyString_Resize(&v, bytesread); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 591 | return v; |
| 592 | } |
| 593 | |
Guido van Rossum | fdf95dd | 1997-05-05 22:15:02 +0000 | [diff] [blame] | 594 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 595 | file_readinto(PyFileObject *f, PyObject *args) |
Guido van Rossum | fdf95dd | 1997-05-05 22:15:02 +0000 | [diff] [blame] | 596 | { |
| 597 | char *ptr; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 598 | size_t ntodo, ndone, nnow; |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 599 | |
Guido van Rossum | fdf95dd | 1997-05-05 22:15:02 +0000 | [diff] [blame] | 600 | if (f->f_fp == NULL) |
| 601 | return err_closed(); |
| 602 | if (!PyArg_Parse(args, "w#", &ptr, &ntodo)) |
| 603 | return NULL; |
| 604 | ndone = 0; |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 605 | while (ntodo > 0) { |
| 606 | Py_BEGIN_ALLOW_THREADS |
| 607 | errno = 0; |
Guido van Rossum | fdf95dd | 1997-05-05 22:15:02 +0000 | [diff] [blame] | 608 | nnow = fread(ptr+ndone, 1, ntodo, f->f_fp); |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 609 | Py_END_ALLOW_THREADS |
| 610 | if (nnow == 0) { |
| 611 | if (!ferror(f->f_fp)) |
| 612 | break; |
Guido van Rossum | fdf95dd | 1997-05-05 22:15:02 +0000 | [diff] [blame] | 613 | PyErr_SetFromErrno(PyExc_IOError); |
| 614 | clearerr(f->f_fp); |
| 615 | return NULL; |
| 616 | } |
Guido van Rossum | fdf95dd | 1997-05-05 22:15:02 +0000 | [diff] [blame] | 617 | ndone += nnow; |
| 618 | ntodo -= nnow; |
| 619 | } |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 620 | return PyInt_FromLong((long)ndone); |
Guido van Rossum | fdf95dd | 1997-05-05 22:15:02 +0000 | [diff] [blame] | 621 | } |
| 622 | |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 623 | /************************************************************************** |
Tim Peters | f29b64d | 2001-01-15 06:33:19 +0000 | [diff] [blame] | 624 | Routine to get next line using platform fgets(). |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 625 | |
| 626 | Under MSVC 6: |
| 627 | |
Tim Peters | 1c73323 | 2001-01-08 04:02:07 +0000 | [diff] [blame] | 628 | + MS threadsafe getc is very slow (multiple layers of function calls before+ |
| 629 | after each character, to lock+unlock the stream). |
| 630 | + The stream-locking functions are MS-internal -- can't access them from user |
| 631 | code. |
| 632 | + There's nothing Tim could find in the MS C or platform SDK libraries that |
| 633 | can worm around this. |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 634 | + MS fgets locks/unlocks only once per line; it's the only hook we have. |
| 635 | |
| 636 | So we use fgets for speed(!), despite that it's painful. |
| 637 | |
| 638 | MS realloc is also slow. |
| 639 | |
Tim Peters | f29b64d | 2001-01-15 06:33:19 +0000 | [diff] [blame] | 640 | Reports from other platforms on this method vs getc_unlocked (which MS doesn't |
| 641 | have): |
| 642 | Linux a wash |
| 643 | Solaris a wash |
| 644 | Tru64 Unix getline_via_fgets significantly faster |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 645 | |
Tim Peters | f29b64d | 2001-01-15 06:33:19 +0000 | [diff] [blame] | 646 | CAUTION: The C std isn't clear about this: in those cases where fgets |
| 647 | writes something into the buffer, can it write into any position beyond the |
| 648 | required trailing null byte? MSVC 6 fgets does not, and no platform is (yet) |
| 649 | known on which it does; and it would be a strange way to code fgets. Still, |
| 650 | getline_via_fgets may not work correctly if it does. The std test |
| 651 | test_bufio.py should fail if platform fgets() routinely writes beyond the |
| 652 | trailing null byte. #define DONT_USE_FGETS_IN_GETLINE to disable this code. |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 653 | **************************************************************************/ |
| 654 | |
Tim Peters | f29b64d | 2001-01-15 06:33:19 +0000 | [diff] [blame] | 655 | /* Use this routine if told to, or by default on non-get_unlocked() |
| 656 | * platforms unless told not to. Yikes! Let's spell that out: |
| 657 | * On a platform with getc_unlocked(): |
| 658 | * By default, use getc_unlocked(). |
| 659 | * If you want to use fgets() instead, #define USE_FGETS_IN_GETLINE. |
| 660 | * On a platform without getc_unlocked(): |
| 661 | * By default, use fgets(). |
| 662 | * If you don't want to use fgets(), #define DONT_USE_FGETS_IN_GETLINE. |
| 663 | */ |
| 664 | #if !defined(USE_FGETS_IN_GETLINE) && !defined(HAVE_GETC_UNLOCKED) |
| 665 | #define USE_FGETS_IN_GETLINE |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 666 | #endif |
| 667 | |
Tim Peters | f29b64d | 2001-01-15 06:33:19 +0000 | [diff] [blame] | 668 | #if defined(DONT_USE_FGETS_IN_GETLINE) && defined(USE_FGETS_IN_GETLINE) |
| 669 | #undef USE_FGETS_IN_GETLINE |
| 670 | #endif |
| 671 | |
| 672 | #ifdef USE_FGETS_IN_GETLINE |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 673 | static PyObject* |
Tim Peters | f29b64d | 2001-01-15 06:33:19 +0000 | [diff] [blame] | 674 | getline_via_fgets(FILE *fp) |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 675 | { |
Tim Peters | 15b8385 | 2001-01-08 00:53:12 +0000 | [diff] [blame] | 676 | /* INITBUFSIZE is the maximum line length that lets us get away with the fast |
Tim Peters | 142297a | 2001-01-15 10:36:56 +0000 | [diff] [blame] | 677 | * no-realloc, one-fgets()-call path. Boosting it isn't free, because we have |
| 678 | * to fill this much of the buffer with a known value in order to figure out |
| 679 | * how much of the buffer fgets() overwrites. So if INITBUFSIZE is larger |
| 680 | * than "most" lines, we waste time filling unused buffer slots. 100 is |
| 681 | * surely adequate for most peoples' email archives, chewing over source code, |
| 682 | * etc -- "regular old text files". |
| 683 | * MAXBUFSIZE is the maximum line length that lets us get away with the less |
| 684 | * fast (but still zippy) no-realloc, two-fgets()-call path. See above for |
| 685 | * cautions about boosting that. 300 was chosen because the worst real-life |
| 686 | * text-crunching job reported on Python-Dev was a mail-log crawler where over |
| 687 | * half the lines were 254 chars. |
| 688 | * INCBUFSIZE is the amount by which we grow the buffer, if MAXBUFSIZE isn't |
| 689 | * enough. It doesn't much matter what this is set to: we only get here for |
| 690 | * absurdly long lines anyway. |
Tim Peters | 15b8385 | 2001-01-08 00:53:12 +0000 | [diff] [blame] | 691 | */ |
Tim Peters | 142297a | 2001-01-15 10:36:56 +0000 | [diff] [blame] | 692 | #define INITBUFSIZE 100 |
| 693 | #define MAXBUFSIZE 300 |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 694 | #define INCBUFSIZE 1000 |
Tim Peters | 142297a | 2001-01-15 10:36:56 +0000 | [diff] [blame] | 695 | char* p; /* temp */ |
| 696 | char buf[MAXBUFSIZE]; |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 697 | PyObject* v; /* the string object result */ |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 698 | char* pvfree; /* address of next free slot */ |
| 699 | char* pvend; /* address one beyond last free slot */ |
Tim Peters | 142297a | 2001-01-15 10:36:56 +0000 | [diff] [blame] | 700 | size_t nfree; /* # of free buffer slots; pvend-pvfree */ |
| 701 | size_t total_v_size; /* total # of slots in buffer */ |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 702 | |
Tim Peters | 15b8385 | 2001-01-08 00:53:12 +0000 | [diff] [blame] | 703 | /* Optimize for normal case: avoid _PyString_Resize if at all |
Tim Peters | 142297a | 2001-01-15 10:36:56 +0000 | [diff] [blame] | 704 | * possible via first reading into stack buffer "buf". |
Tim Peters | 15b8385 | 2001-01-08 00:53:12 +0000 | [diff] [blame] | 705 | */ |
Tim Peters | 142297a | 2001-01-15 10:36:56 +0000 | [diff] [blame] | 706 | total_v_size = INITBUFSIZE; /* start small and pray */ |
| 707 | pvfree = buf; |
| 708 | for (;;) { |
| 709 | Py_BEGIN_ALLOW_THREADS |
| 710 | pvend = buf + total_v_size; |
| 711 | nfree = pvend - pvfree; |
| 712 | memset(pvfree, '\n', nfree); |
| 713 | p = fgets(pvfree, nfree, fp); |
| 714 | Py_END_ALLOW_THREADS |
Tim Peters | 15b8385 | 2001-01-08 00:53:12 +0000 | [diff] [blame] | 715 | |
Tim Peters | 142297a | 2001-01-15 10:36:56 +0000 | [diff] [blame] | 716 | if (p == NULL) { |
| 717 | clearerr(fp); |
| 718 | if (PyErr_CheckSignals()) |
| 719 | return NULL; |
| 720 | v = PyString_FromStringAndSize(buf, pvfree - buf); |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 721 | return v; |
| 722 | } |
Tim Peters | 142297a | 2001-01-15 10:36:56 +0000 | [diff] [blame] | 723 | /* fgets read *something* */ |
| 724 | p = memchr(pvfree, '\n', nfree); |
| 725 | if (p != NULL) { |
| 726 | /* Did the \n come from fgets or from us? |
| 727 | * Since fgets stops at the first \n, and then writes |
| 728 | * \0, if it's from fgets a \0 must be next. But if |
| 729 | * that's so, it could not have come from us, since |
| 730 | * the \n's we filled the buffer with have only more |
| 731 | * \n's to the right. |
| 732 | */ |
| 733 | if (p+1 < pvend && *(p+1) == '\0') { |
| 734 | /* It's from fgets: we win! In particular, |
| 735 | * we haven't done any mallocs yet, and can |
| 736 | * build the final result on the first try. |
| 737 | */ |
| 738 | ++p; /* include \n from fgets */ |
| 739 | } |
| 740 | else { |
| 741 | /* Must be from us: fgets didn't fill the |
| 742 | * buffer and didn't find a newline, so it |
| 743 | * must be the last and newline-free line of |
| 744 | * the file. |
| 745 | */ |
| 746 | assert(p > pvfree && *(p-1) == '\0'); |
| 747 | --p; /* don't include \0 from fgets */ |
| 748 | } |
| 749 | v = PyString_FromStringAndSize(buf, p - buf); |
| 750 | return v; |
| 751 | } |
| 752 | /* yuck: fgets overwrote all the newlines, i.e. the entire |
| 753 | * buffer. So this line isn't over yet, or maybe it is but |
| 754 | * we're exactly at EOF. If we haven't already, try using the |
| 755 | * rest of the stack buffer. |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 756 | */ |
Tim Peters | 142297a | 2001-01-15 10:36:56 +0000 | [diff] [blame] | 757 | assert(*(pvend-1) == '\0'); |
| 758 | if (pvfree == buf) { |
| 759 | pvfree = pvend - 1; /* overwrite trailing null */ |
| 760 | total_v_size = MAXBUFSIZE; |
| 761 | } |
| 762 | else |
| 763 | break; |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 764 | } |
Tim Peters | 142297a | 2001-01-15 10:36:56 +0000 | [diff] [blame] | 765 | |
| 766 | /* The stack buffer isn't big enough; malloc a string object and read |
| 767 | * into its buffer. |
Tim Peters | 15b8385 | 2001-01-08 00:53:12 +0000 | [diff] [blame] | 768 | */ |
Tim Peters | 142297a | 2001-01-15 10:36:56 +0000 | [diff] [blame] | 769 | total_v_size = MAXBUFSIZE + INCBUFSIZE; |
Tim Peters | 1c73323 | 2001-01-08 04:02:07 +0000 | [diff] [blame] | 770 | v = PyString_FromStringAndSize((char*)NULL, (int)total_v_size); |
Tim Peters | 15b8385 | 2001-01-08 00:53:12 +0000 | [diff] [blame] | 771 | if (v == NULL) |
| 772 | return v; |
| 773 | /* copy over everything except the last null byte */ |
Tim Peters | 142297a | 2001-01-15 10:36:56 +0000 | [diff] [blame] | 774 | memcpy(BUF(v), buf, MAXBUFSIZE-1); |
| 775 | pvfree = BUF(v) + MAXBUFSIZE - 1; |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 776 | |
| 777 | /* Keep reading stuff into v; if it ever ends successfully, break |
Tim Peters | 15b8385 | 2001-01-08 00:53:12 +0000 | [diff] [blame] | 778 | * after setting p one beyond the end of the line. The code here is |
| 779 | * very much like the code above, except reads into v's buffer; see |
| 780 | * the code above for detailed comments about the logic. |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 781 | */ |
| 782 | for (;;) { |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 783 | Py_BEGIN_ALLOW_THREADS |
| 784 | pvend = BUF(v) + total_v_size; |
| 785 | nfree = pvend - pvfree; |
| 786 | memset(pvfree, '\n', nfree); |
| 787 | p = fgets(pvfree, nfree, fp); |
| 788 | Py_END_ALLOW_THREADS |
| 789 | |
| 790 | if (p == NULL) { |
| 791 | clearerr(fp); |
| 792 | if (PyErr_CheckSignals()) { |
| 793 | Py_DECREF(v); |
| 794 | return NULL; |
| 795 | } |
| 796 | p = pvfree; |
| 797 | break; |
| 798 | } |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 799 | p = memchr(pvfree, '\n', nfree); |
| 800 | if (p != NULL) { |
| 801 | if (p+1 < pvend && *(p+1) == '\0') { |
| 802 | /* \n came from fgets */ |
| 803 | ++p; |
| 804 | break; |
| 805 | } |
| 806 | /* \n came from us; last line of file, no newline */ |
| 807 | assert(p > pvfree && *(p-1) == '\0'); |
| 808 | --p; |
| 809 | break; |
| 810 | } |
| 811 | /* expand buffer and try again */ |
| 812 | assert(*(pvend-1) == '\0'); |
| 813 | total_v_size += INCBUFSIZE; |
| 814 | if (total_v_size > INT_MAX) { |
| 815 | PyErr_SetString(PyExc_OverflowError, |
| 816 | "line is longer than a Python string can hold"); |
| 817 | Py_DECREF(v); |
| 818 | return NULL; |
| 819 | } |
| 820 | if (_PyString_Resize(&v, (int)total_v_size) < 0) |
| 821 | return NULL; |
| 822 | /* overwrite the trailing null byte */ |
| 823 | pvfree = BUF(v) + (total_v_size - INCBUFSIZE - 1); |
| 824 | } |
| 825 | if (BUF(v) + total_v_size != p) |
| 826 | _PyString_Resize(&v, p - BUF(v)); |
| 827 | return v; |
| 828 | #undef INITBUFSIZE |
Tim Peters | 142297a | 2001-01-15 10:36:56 +0000 | [diff] [blame] | 829 | #undef MAXBUFSIZE |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 830 | #undef INCBUFSIZE |
| 831 | } |
Tim Peters | f29b64d | 2001-01-15 06:33:19 +0000 | [diff] [blame] | 832 | #endif /* ifdef USE_FGETS_IN_GETLINE */ |
Guido van Rossum | fdf95dd | 1997-05-05 22:15:02 +0000 | [diff] [blame] | 833 | |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 834 | /* Internal routine to get a line. |
| 835 | Size argument interpretation: |
| 836 | > 0: max length; |
Guido van Rossum | 8628206 | 2001-01-08 01:26:47 +0000 | [diff] [blame] | 837 | <= 0: read arbitrary line |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 838 | */ |
| 839 | |
Guido van Rossum | 1187aa4 | 2001-01-05 14:43:05 +0000 | [diff] [blame] | 840 | #ifdef HAVE_GETC_UNLOCKED |
| 841 | #define GETC(f) getc_unlocked(f) |
| 842 | #define FLOCKFILE(f) flockfile(f) |
| 843 | #define FUNLOCKFILE(f) funlockfile(f) |
| 844 | #else |
| 845 | #define GETC(f) getc(f) |
| 846 | #define FLOCKFILE(f) |
| 847 | #define FUNLOCKFILE(f) |
| 848 | #endif |
| 849 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 850 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 851 | get_line(PyFileObject *f, int n) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 852 | { |
Guido van Rossum | 1187aa4 | 2001-01-05 14:43:05 +0000 | [diff] [blame] | 853 | FILE *fp = f->f_fp; |
| 854 | int c; |
Andrew M. Kuchling | 4b2b445 | 2000-11-29 02:53:22 +0000 | [diff] [blame] | 855 | char *buf, *end; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 856 | size_t n1, n2; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 857 | PyObject *v; |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 858 | |
Tim Peters | f29b64d | 2001-01-15 06:33:19 +0000 | [diff] [blame] | 859 | #ifdef USE_FGETS_IN_GETLINE |
Guido van Rossum | 8628206 | 2001-01-08 01:26:47 +0000 | [diff] [blame] | 860 | if (n <= 0) |
Tim Peters | f29b64d | 2001-01-15 06:33:19 +0000 | [diff] [blame] | 861 | return getline_via_fgets(fp); |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 862 | #endif |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 863 | n2 = n > 0 ? n : 100; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 864 | v = PyString_FromStringAndSize((char *)NULL, n2); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 865 | if (v == NULL) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 866 | return NULL; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 867 | buf = BUF(v); |
| 868 | end = buf + n2; |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 869 | |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 870 | for (;;) { |
Guido van Rossum | 1187aa4 | 2001-01-05 14:43:05 +0000 | [diff] [blame] | 871 | Py_BEGIN_ALLOW_THREADS |
| 872 | FLOCKFILE(fp); |
| 873 | while ((c = GETC(fp)) != EOF && |
| 874 | (*buf++ = c) != '\n' && |
| 875 | buf != end) |
| 876 | ; |
| 877 | FUNLOCKFILE(fp); |
| 878 | Py_END_ALLOW_THREADS |
| 879 | if (c == '\n') |
| 880 | break; |
| 881 | if (c == EOF) { |
Guido van Rossum | 76ad8ed | 1991-06-03 10:54:55 +0000 | [diff] [blame] | 882 | clearerr(fp); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 883 | if (PyErr_CheckSignals()) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 884 | Py_DECREF(v); |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 885 | return NULL; |
| 886 | } |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 887 | break; |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 888 | } |
Guido van Rossum | 1187aa4 | 2001-01-05 14:43:05 +0000 | [diff] [blame] | 889 | /* Must be because buf == end */ |
| 890 | if (n > 0) |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 891 | break; |
Guido van Rossum | 1187aa4 | 2001-01-05 14:43:05 +0000 | [diff] [blame] | 892 | n1 = n2; |
| 893 | n2 += 1000; |
| 894 | if (n2 > INT_MAX) { |
| 895 | PyErr_SetString(PyExc_OverflowError, |
| 896 | "line is longer than a Python string can hold"); |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 897 | Py_DECREF(v); |
Guido van Rossum | 1187aa4 | 2001-01-05 14:43:05 +0000 | [diff] [blame] | 898 | return NULL; |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 899 | } |
Guido van Rossum | 1187aa4 | 2001-01-05 14:43:05 +0000 | [diff] [blame] | 900 | if (_PyString_Resize(&v, n2) < 0) |
| 901 | return NULL; |
| 902 | buf = BUF(v) + n1; |
| 903 | end = BUF(v) + n2; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 904 | } |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 905 | |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 906 | n1 = buf - BUF(v); |
| 907 | if (n1 != n2) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 908 | _PyString_Resize(&v, n1); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 909 | return v; |
| 910 | } |
| 911 | |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 912 | /* External C interface */ |
| 913 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 914 | PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 915 | PyFile_GetLine(PyObject *f, int n) |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 916 | { |
Guido van Rossum | 4ddf0a0 | 2001-01-07 20:51:39 +0000 | [diff] [blame] | 917 | PyObject *result; |
| 918 | |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 919 | if (f == NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 920 | PyErr_BadInternalCall(); |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 921 | return NULL; |
| 922 | } |
Guido van Rossum | 4ddf0a0 | 2001-01-07 20:51:39 +0000 | [diff] [blame] | 923 | |
| 924 | if (PyFile_Check(f)) { |
| 925 | if (((PyFileObject*)f)->f_fp == NULL) |
| 926 | return err_closed(); |
| 927 | result = get_line((PyFileObject *)f, n); |
| 928 | } |
| 929 | else { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 930 | PyObject *reader; |
| 931 | PyObject *args; |
Guido van Rossum | 4ddf0a0 | 2001-01-07 20:51:39 +0000 | [diff] [blame] | 932 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 933 | reader = PyObject_GetAttrString(f, "readline"); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 934 | if (reader == NULL) |
| 935 | return NULL; |
| 936 | if (n <= 0) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 937 | args = Py_BuildValue("()"); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 938 | else |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 939 | args = Py_BuildValue("(i)", n); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 940 | if (args == NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 941 | Py_DECREF(reader); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 942 | return NULL; |
| 943 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 944 | result = PyEval_CallObject(reader, args); |
| 945 | Py_DECREF(reader); |
| 946 | Py_DECREF(args); |
| 947 | if (result != NULL && !PyString_Check(result)) { |
| 948 | Py_DECREF(result); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 949 | result = NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 950 | PyErr_SetString(PyExc_TypeError, |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 951 | "object.readline() returned non-string"); |
| 952 | } |
Guido van Rossum | 4ddf0a0 | 2001-01-07 20:51:39 +0000 | [diff] [blame] | 953 | } |
| 954 | |
| 955 | if (n < 0 && result != NULL && PyString_Check(result)) { |
| 956 | char *s = PyString_AS_STRING(result); |
| 957 | int len = PyString_GET_SIZE(result); |
| 958 | if (len == 0) { |
| 959 | Py_DECREF(result); |
| 960 | result = NULL; |
| 961 | PyErr_SetString(PyExc_EOFError, |
| 962 | "EOF when reading a line"); |
| 963 | } |
| 964 | else if (s[len-1] == '\n') { |
| 965 | if (result->ob_refcnt == 1) |
| 966 | _PyString_Resize(&result, len-1); |
| 967 | else { |
| 968 | PyObject *v; |
| 969 | v = PyString_FromStringAndSize(s, len-1); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 970 | Py_DECREF(result); |
Guido van Rossum | 4ddf0a0 | 2001-01-07 20:51:39 +0000 | [diff] [blame] | 971 | result = v; |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 972 | } |
| 973 | } |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 974 | } |
Guido van Rossum | 4ddf0a0 | 2001-01-07 20:51:39 +0000 | [diff] [blame] | 975 | return result; |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 976 | } |
| 977 | |
| 978 | /* Python method */ |
| 979 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 980 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 981 | file_readline(PyFileObject *f, PyObject *args) |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 982 | { |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 983 | int n = -1; |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 984 | |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 985 | if (f->f_fp == NULL) |
| 986 | return err_closed(); |
Guido van Rossum | 43713e5 | 2000-02-29 13:59:29 +0000 | [diff] [blame] | 987 | if (!PyArg_ParseTuple(args, "|i:readline", &n)) |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 988 | return NULL; |
| 989 | if (n == 0) |
| 990 | return PyString_FromString(""); |
| 991 | if (n < 0) |
| 992 | n = 0; |
Marc-André Lemburg | 1f46860 | 2000-07-05 15:32:40 +0000 | [diff] [blame] | 993 | return get_line(f, n); |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 994 | } |
| 995 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 996 | static PyObject * |
Guido van Rossum | e07d5cf | 2001-01-09 21:50:24 +0000 | [diff] [blame] | 997 | file_xreadlines(PyFileObject *f, PyObject *args) |
| 998 | { |
| 999 | static PyObject* xreadlines_function = NULL; |
Tim Peters | f29b64d | 2001-01-15 06:33:19 +0000 | [diff] [blame] | 1000 | |
Guido van Rossum | e07d5cf | 2001-01-09 21:50:24 +0000 | [diff] [blame] | 1001 | if (!PyArg_ParseTuple(args, ":xreadlines")) |
| 1002 | return NULL; |
Tim Peters | f29b64d | 2001-01-15 06:33:19 +0000 | [diff] [blame] | 1003 | |
Guido van Rossum | e07d5cf | 2001-01-09 21:50:24 +0000 | [diff] [blame] | 1004 | if (!xreadlines_function) { |
| 1005 | PyObject *xreadlines_module = |
| 1006 | PyImport_ImportModule("xreadlines"); |
| 1007 | if(!xreadlines_module) |
| 1008 | return NULL; |
| 1009 | |
| 1010 | xreadlines_function = PyObject_GetAttrString(xreadlines_module, |
| 1011 | "xreadlines"); |
| 1012 | Py_DECREF(xreadlines_module); |
| 1013 | if(!xreadlines_function) |
| 1014 | return NULL; |
| 1015 | } |
| 1016 | return PyObject_CallFunction(xreadlines_function, "(O)", f); |
| 1017 | } |
| 1018 | |
| 1019 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 1020 | file_readlines(PyFileObject *f, PyObject *args) |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 1021 | { |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 1022 | long sizehint = 0; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1023 | PyObject *list; |
| 1024 | PyObject *line; |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 1025 | char small_buffer[SMALLCHUNK]; |
| 1026 | char *buffer = small_buffer; |
| 1027 | size_t buffersize = SMALLCHUNK; |
| 1028 | PyObject *big_buffer = NULL; |
| 1029 | size_t nfilled = 0; |
| 1030 | size_t nread; |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 1031 | size_t totalread = 0; |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 1032 | char *p, *q, *end; |
| 1033 | int err; |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 1034 | |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 1035 | if (f->f_fp == NULL) |
| 1036 | return err_closed(); |
Guido van Rossum | 43713e5 | 2000-02-29 13:59:29 +0000 | [diff] [blame] | 1037 | if (!PyArg_ParseTuple(args, "|l:readlines", &sizehint)) |
Guido van Rossum | 0bd2441 | 1991-04-04 15:21:57 +0000 | [diff] [blame] | 1038 | return NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1039 | if ((list = PyList_New(0)) == NULL) |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 1040 | return NULL; |
| 1041 | for (;;) { |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 1042 | Py_BEGIN_ALLOW_THREADS |
| 1043 | errno = 0; |
| 1044 | nread = fread(buffer+nfilled, 1, buffersize-nfilled, f->f_fp); |
| 1045 | Py_END_ALLOW_THREADS |
| 1046 | if (nread == 0) { |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 1047 | sizehint = 0; |
Guido van Rossum | 3da3fce | 1998-02-19 20:46:48 +0000 | [diff] [blame] | 1048 | if (!ferror(f->f_fp)) |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 1049 | break; |
| 1050 | PyErr_SetFromErrno(PyExc_IOError); |
| 1051 | clearerr(f->f_fp); |
| 1052 | error: |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1053 | Py_DECREF(list); |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 1054 | list = NULL; |
| 1055 | goto cleanup; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 1056 | } |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 1057 | totalread += nread; |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 1058 | p = memchr(buffer+nfilled, '\n', nread); |
| 1059 | if (p == NULL) { |
| 1060 | /* Need a larger buffer to fit this line */ |
| 1061 | nfilled += nread; |
| 1062 | buffersize *= 2; |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 1063 | if (buffersize > INT_MAX) { |
| 1064 | PyErr_SetString(PyExc_OverflowError, |
Guido van Rossum | e07d5cf | 2001-01-09 21:50:24 +0000 | [diff] [blame] | 1065 | "line is longer than a Python string can hold"); |
Trent Mick | f29f47b | 2000-08-11 19:02:59 +0000 | [diff] [blame] | 1066 | goto error; |
| 1067 | } |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 1068 | if (big_buffer == NULL) { |
| 1069 | /* Create the big buffer */ |
| 1070 | big_buffer = PyString_FromStringAndSize( |
| 1071 | NULL, buffersize); |
| 1072 | if (big_buffer == NULL) |
| 1073 | goto error; |
| 1074 | buffer = PyString_AS_STRING(big_buffer); |
| 1075 | memcpy(buffer, small_buffer, nfilled); |
| 1076 | } |
| 1077 | else { |
| 1078 | /* Grow the big buffer */ |
| 1079 | _PyString_Resize(&big_buffer, buffersize); |
| 1080 | buffer = PyString_AS_STRING(big_buffer); |
| 1081 | } |
| 1082 | continue; |
| 1083 | } |
| 1084 | end = buffer+nfilled+nread; |
| 1085 | q = buffer; |
| 1086 | do { |
| 1087 | /* Process complete lines */ |
| 1088 | p++; |
| 1089 | line = PyString_FromStringAndSize(q, p-q); |
| 1090 | if (line == NULL) |
| 1091 | goto error; |
| 1092 | err = PyList_Append(list, line); |
| 1093 | Py_DECREF(line); |
| 1094 | if (err != 0) |
| 1095 | goto error; |
| 1096 | q = p; |
| 1097 | p = memchr(q, '\n', end-q); |
| 1098 | } while (p != NULL); |
| 1099 | /* Move the remaining incomplete line to the start */ |
| 1100 | nfilled = end-q; |
| 1101 | memmove(buffer, q, nfilled); |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 1102 | if (sizehint > 0) |
| 1103 | if (totalread >= (size_t)sizehint) |
| 1104 | break; |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 1105 | } |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 1106 | if (nfilled != 0) { |
| 1107 | /* Partial last line */ |
| 1108 | line = PyString_FromStringAndSize(buffer, nfilled); |
| 1109 | if (line == NULL) |
| 1110 | goto error; |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 1111 | if (sizehint > 0) { |
| 1112 | /* Need to complete the last line */ |
Marc-André Lemburg | 1f46860 | 2000-07-05 15:32:40 +0000 | [diff] [blame] | 1113 | PyObject *rest = get_line(f, 0); |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 1114 | if (rest == NULL) { |
| 1115 | Py_DECREF(line); |
| 1116 | goto error; |
| 1117 | } |
| 1118 | PyString_Concat(&line, rest); |
| 1119 | Py_DECREF(rest); |
| 1120 | if (line == NULL) |
| 1121 | goto error; |
| 1122 | } |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 1123 | err = PyList_Append(list, line); |
| 1124 | Py_DECREF(line); |
| 1125 | if (err != 0) |
| 1126 | goto error; |
| 1127 | } |
| 1128 | cleanup: |
Guido van Rossum | 1109fbc | 1998-04-10 22:16:39 +0000 | [diff] [blame] | 1129 | if (big_buffer) { |
Guido van Rossum | 6263d54 | 1997-05-10 22:07:25 +0000 | [diff] [blame] | 1130 | Py_DECREF(big_buffer); |
Guido van Rossum | 1109fbc | 1998-04-10 22:16:39 +0000 | [diff] [blame] | 1131 | } |
Guido van Rossum | ce5ba84 | 1991-03-06 13:06:18 +0000 | [diff] [blame] | 1132 | return list; |
| 1133 | } |
| 1134 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1135 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 1136 | file_write(PyFileObject *f, PyObject *args) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1137 | { |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 1138 | char *s; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1139 | int n, n2; |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 1140 | if (f->f_fp == NULL) |
| 1141 | return err_closed(); |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 1142 | if (!PyArg_Parse(args, f->f_binary ? "s#" : "t#", &s, &n)) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1143 | return NULL; |
Guido van Rossum | eb183da | 1991-04-04 10:44:06 +0000 | [diff] [blame] | 1144 | f->f_softspace = 0; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1145 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1146 | errno = 0; |
Guido van Rossum | d7297e6 | 1992-07-06 14:19:26 +0000 | [diff] [blame] | 1147 | n2 = fwrite(s, 1, n, f->f_fp); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1148 | Py_END_ALLOW_THREADS |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1149 | if (n2 != n) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1150 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | febd551 | 1992-03-04 16:39:24 +0000 | [diff] [blame] | 1151 | clearerr(f->f_fp); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1152 | return NULL; |
| 1153 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1154 | Py_INCREF(Py_None); |
| 1155 | return Py_None; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1156 | } |
| 1157 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1158 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 1159 | file_writelines(PyFileObject *f, PyObject *args) |
Guido van Rossum | 5a2a683 | 1993-10-25 09:59:04 +0000 | [diff] [blame] | 1160 | { |
Guido van Rossum | ee70ad1 | 2000-03-13 16:27:06 +0000 | [diff] [blame] | 1161 | #define CHUNKSIZE 1000 |
| 1162 | PyObject *list, *line; |
| 1163 | PyObject *result; |
| 1164 | int i, j, index, len, nwritten, islist; |
| 1165 | |
Guido van Rossum | 5a2a683 | 1993-10-25 09:59:04 +0000 | [diff] [blame] | 1166 | if (f->f_fp == NULL) |
| 1167 | return err_closed(); |
Guido van Rossum | ee70ad1 | 2000-03-13 16:27:06 +0000 | [diff] [blame] | 1168 | if (args == NULL || !PySequence_Check(args)) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1169 | PyErr_SetString(PyExc_TypeError, |
Fred Drake | 661ea26 | 2000-10-24 19:57:45 +0000 | [diff] [blame] | 1170 | "writelines() argument must be a sequence of strings"); |
Guido van Rossum | 5a2a683 | 1993-10-25 09:59:04 +0000 | [diff] [blame] | 1171 | return NULL; |
| 1172 | } |
Guido van Rossum | ee70ad1 | 2000-03-13 16:27:06 +0000 | [diff] [blame] | 1173 | islist = PyList_Check(args); |
| 1174 | |
| 1175 | /* Strategy: slurp CHUNKSIZE lines into a private list, |
| 1176 | checking that they are all strings, then write that list |
| 1177 | without holding the interpreter lock, then come back for more. */ |
| 1178 | index = 0; |
| 1179 | if (islist) |
| 1180 | list = NULL; |
| 1181 | else { |
| 1182 | list = PyList_New(CHUNKSIZE); |
| 1183 | if (list == NULL) |
Guido van Rossum | 5a2a683 | 1993-10-25 09:59:04 +0000 | [diff] [blame] | 1184 | return NULL; |
Guido van Rossum | 5a2a683 | 1993-10-25 09:59:04 +0000 | [diff] [blame] | 1185 | } |
Guido van Rossum | ee70ad1 | 2000-03-13 16:27:06 +0000 | [diff] [blame] | 1186 | result = NULL; |
| 1187 | |
| 1188 | for (;;) { |
| 1189 | if (islist) { |
| 1190 | Py_XDECREF(list); |
| 1191 | list = PyList_GetSlice(args, index, index+CHUNKSIZE); |
| 1192 | if (list == NULL) |
| 1193 | return NULL; |
| 1194 | j = PyList_GET_SIZE(list); |
| 1195 | } |
| 1196 | else { |
| 1197 | for (j = 0; j < CHUNKSIZE; j++) { |
| 1198 | line = PySequence_GetItem(args, index+j); |
| 1199 | if (line == NULL) { |
| 1200 | if (PyErr_ExceptionMatches( |
Marc-André Lemburg | 6ef68b5 | 2000-08-25 22:39:50 +0000 | [diff] [blame] | 1201 | PyExc_IndexError)) { |
Guido van Rossum | ee70ad1 | 2000-03-13 16:27:06 +0000 | [diff] [blame] | 1202 | PyErr_Clear(); |
| 1203 | break; |
| 1204 | } |
| 1205 | /* Some other error occurred. |
| 1206 | XXX We may lose some output. */ |
| 1207 | goto error; |
| 1208 | } |
Guido van Rossum | ee70ad1 | 2000-03-13 16:27:06 +0000 | [diff] [blame] | 1209 | PyList_SetItem(list, j, line); |
| 1210 | } |
| 1211 | } |
| 1212 | if (j == 0) |
| 1213 | break; |
| 1214 | |
Marc-André Lemburg | 6ef68b5 | 2000-08-25 22:39:50 +0000 | [diff] [blame] | 1215 | /* Check that all entries are indeed strings. If not, |
| 1216 | apply the same rules as for file.write() and |
| 1217 | convert the results to strings. This is slow, but |
| 1218 | seems to be the only way since all conversion APIs |
| 1219 | could potentially execute Python code. */ |
| 1220 | for (i = 0; i < j; i++) { |
| 1221 | PyObject *v = PyList_GET_ITEM(list, i); |
| 1222 | if (!PyString_Check(v)) { |
| 1223 | const char *buffer; |
| 1224 | int len; |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 1225 | if (((f->f_binary && |
Marc-André Lemburg | 6ef68b5 | 2000-08-25 22:39:50 +0000 | [diff] [blame] | 1226 | PyObject_AsReadBuffer(v, |
| 1227 | (const void**)&buffer, |
| 1228 | &len)) || |
| 1229 | PyObject_AsCharBuffer(v, |
| 1230 | &buffer, |
| 1231 | &len))) { |
| 1232 | PyErr_SetString(PyExc_TypeError, |
Fred Drake | 661ea26 | 2000-10-24 19:57:45 +0000 | [diff] [blame] | 1233 | "writelines() argument must be a sequence of strings"); |
Marc-André Lemburg | 6ef68b5 | 2000-08-25 22:39:50 +0000 | [diff] [blame] | 1234 | goto error; |
| 1235 | } |
| 1236 | line = PyString_FromStringAndSize(buffer, |
| 1237 | len); |
| 1238 | if (line == NULL) |
| 1239 | goto error; |
| 1240 | Py_DECREF(v); |
Marc-André Lemburg | f5e96fa | 2000-08-25 22:49:05 +0000 | [diff] [blame] | 1241 | PyList_SET_ITEM(list, i, line); |
Marc-André Lemburg | 6ef68b5 | 2000-08-25 22:39:50 +0000 | [diff] [blame] | 1242 | } |
| 1243 | } |
| 1244 | |
| 1245 | /* Since we are releasing the global lock, the |
| 1246 | following code may *not* execute Python code. */ |
Guido van Rossum | ee70ad1 | 2000-03-13 16:27:06 +0000 | [diff] [blame] | 1247 | Py_BEGIN_ALLOW_THREADS |
| 1248 | f->f_softspace = 0; |
| 1249 | errno = 0; |
| 1250 | for (i = 0; i < j; i++) { |
Marc-André Lemburg | 6ef68b5 | 2000-08-25 22:39:50 +0000 | [diff] [blame] | 1251 | line = PyList_GET_ITEM(list, i); |
Guido van Rossum | ee70ad1 | 2000-03-13 16:27:06 +0000 | [diff] [blame] | 1252 | len = PyString_GET_SIZE(line); |
| 1253 | nwritten = fwrite(PyString_AS_STRING(line), |
| 1254 | 1, len, f->f_fp); |
| 1255 | if (nwritten != len) { |
| 1256 | Py_BLOCK_THREADS |
| 1257 | PyErr_SetFromErrno(PyExc_IOError); |
| 1258 | clearerr(f->f_fp); |
| 1259 | goto error; |
| 1260 | } |
| 1261 | } |
| 1262 | Py_END_ALLOW_THREADS |
| 1263 | |
| 1264 | if (j < CHUNKSIZE) |
| 1265 | break; |
| 1266 | index += CHUNKSIZE; |
| 1267 | } |
| 1268 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1269 | Py_INCREF(Py_None); |
Guido van Rossum | ee70ad1 | 2000-03-13 16:27:06 +0000 | [diff] [blame] | 1270 | result = Py_None; |
| 1271 | error: |
| 1272 | Py_XDECREF(list); |
| 1273 | return result; |
Guido van Rossum | 5a2a683 | 1993-10-25 09:59:04 +0000 | [diff] [blame] | 1274 | } |
| 1275 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1276 | static PyMethodDef file_methods[] = { |
Guido van Rossum | 789a161 | 1997-05-10 22:33:55 +0000 | [diff] [blame] | 1277 | {"readline", (PyCFunction)file_readline, 1}, |
Guido van Rossum | 74ba247 | 1997-07-13 03:56:50 +0000 | [diff] [blame] | 1278 | {"read", (PyCFunction)file_read, 1}, |
| 1279 | {"write", (PyCFunction)file_write, 0}, |
| 1280 | {"fileno", (PyCFunction)file_fileno, 0}, |
Guido van Rossum | 8830319 | 1999-01-04 17:22:18 +0000 | [diff] [blame] | 1281 | {"seek", (PyCFunction)file_seek, 1}, |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 1282 | #ifdef HAVE_FTRUNCATE |
Guido van Rossum | 8830319 | 1999-01-04 17:22:18 +0000 | [diff] [blame] | 1283 | {"truncate", (PyCFunction)file_truncate, 1}, |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 1284 | #endif |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1285 | {"tell", (PyCFunction)file_tell, 0}, |
Guido van Rossum | fdf95dd | 1997-05-05 22:15:02 +0000 | [diff] [blame] | 1286 | {"readinto", (PyCFunction)file_readinto, 0}, |
Guido van Rossum | 74ba247 | 1997-07-13 03:56:50 +0000 | [diff] [blame] | 1287 | {"readlines", (PyCFunction)file_readlines, 1}, |
Guido van Rossum | e07d5cf | 2001-01-09 21:50:24 +0000 | [diff] [blame] | 1288 | {"xreadlines", (PyCFunction)file_xreadlines, 1}, |
Guido van Rossum | 74ba247 | 1997-07-13 03:56:50 +0000 | [diff] [blame] | 1289 | {"writelines", (PyCFunction)file_writelines, 0}, |
| 1290 | {"flush", (PyCFunction)file_flush, 0}, |
| 1291 | {"close", (PyCFunction)file_close, 0}, |
| 1292 | {"isatty", (PyCFunction)file_isatty, 0}, |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1293 | {NULL, NULL} /* sentinel */ |
| 1294 | }; |
| 1295 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1296 | #define OFF(x) offsetof(PyFileObject, x) |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1297 | |
| 1298 | static struct memberlist file_memberlist[] = { |
| 1299 | {"softspace", T_INT, OFF(f_softspace)}, |
| 1300 | {"mode", T_OBJECT, OFF(f_mode), RO}, |
| 1301 | {"name", T_OBJECT, OFF(f_name), RO}, |
| 1302 | /* getattr(f, "closed") is implemented without this table */ |
| 1303 | {"closed", T_INT, 0, RO}, |
| 1304 | {NULL} /* Sentinel */ |
| 1305 | }; |
| 1306 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1307 | static PyObject * |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 1308 | file_getattr(PyFileObject *f, char *name) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1309 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1310 | PyObject *res; |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1311 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1312 | res = Py_FindMethod(file_methods, (PyObject *)f, name); |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1313 | if (res != NULL) |
| 1314 | return res; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1315 | PyErr_Clear(); |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1316 | if (strcmp(name, "closed") == 0) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1317 | return PyInt_FromLong((long)(f->f_fp == 0)); |
| 1318 | return PyMember_Get((char *)f, file_memberlist, name); |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1319 | } |
| 1320 | |
| 1321 | static int |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 1322 | file_setattr(PyFileObject *f, char *name, PyObject *v) |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1323 | { |
| 1324 | if (v == NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1325 | PyErr_SetString(PyExc_AttributeError, |
| 1326 | "can't delete file attributes"); |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1327 | return -1; |
| 1328 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1329 | return PyMember_Set((char *)f, file_memberlist, name, v); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1330 | } |
| 1331 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1332 | PyTypeObject PyFile_Type = { |
| 1333 | PyObject_HEAD_INIT(&PyType_Type) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1334 | 0, |
| 1335 | "file", |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1336 | sizeof(PyFileObject), |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1337 | 0, |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1338 | (destructor)file_dealloc, /*tp_dealloc*/ |
Guido van Rossum | 7066dd7 | 1992-09-17 17:54:56 +0000 | [diff] [blame] | 1339 | 0, /*tp_print*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1340 | (getattrfunc)file_getattr, /*tp_getattr*/ |
| 1341 | (setattrfunc)file_setattr, /*tp_setattr*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1342 | 0, /*tp_compare*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1343 | (reprfunc)file_repr, /*tp_repr*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1344 | }; |
Guido van Rossum | eb183da | 1991-04-04 10:44:06 +0000 | [diff] [blame] | 1345 | |
| 1346 | /* Interface for the 'soft space' between print items. */ |
| 1347 | |
| 1348 | int |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 1349 | PyFile_SoftSpace(PyObject *f, int newflag) |
Guido van Rossum | eb183da | 1991-04-04 10:44:06 +0000 | [diff] [blame] | 1350 | { |
| 1351 | int oldflag = 0; |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1352 | if (f == NULL) { |
| 1353 | /* Do nothing */ |
| 1354 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1355 | else if (PyFile_Check(f)) { |
| 1356 | oldflag = ((PyFileObject *)f)->f_softspace; |
| 1357 | ((PyFileObject *)f)->f_softspace = newflag; |
Guido van Rossum | eb183da | 1991-04-04 10:44:06 +0000 | [diff] [blame] | 1358 | } |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1359 | else { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1360 | PyObject *v; |
| 1361 | v = PyObject_GetAttrString(f, "softspace"); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1362 | if (v == NULL) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1363 | PyErr_Clear(); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1364 | else { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1365 | if (PyInt_Check(v)) |
| 1366 | oldflag = PyInt_AsLong(v); |
| 1367 | Py_DECREF(v); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1368 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1369 | v = PyInt_FromLong((long)newflag); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1370 | if (v == NULL) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1371 | PyErr_Clear(); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1372 | else { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1373 | if (PyObject_SetAttrString(f, "softspace", v) != 0) |
| 1374 | PyErr_Clear(); |
| 1375 | Py_DECREF(v); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1376 | } |
| 1377 | } |
Guido van Rossum | eb183da | 1991-04-04 10:44:06 +0000 | [diff] [blame] | 1378 | return oldflag; |
| 1379 | } |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1380 | |
| 1381 | /* Interfaces to write objects/strings to file-like objects */ |
| 1382 | |
| 1383 | int |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 1384 | PyFile_WriteObject(PyObject *v, PyObject *f, int flags) |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1385 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1386 | PyObject *writer, *value, *args, *result; |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1387 | if (f == NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1388 | PyErr_SetString(PyExc_TypeError, "writeobject with NULL file"); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1389 | return -1; |
| 1390 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1391 | else if (PyFile_Check(f)) { |
| 1392 | FILE *fp = PyFile_AsFile(f); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1393 | if (fp == NULL) { |
| 1394 | err_closed(); |
| 1395 | return -1; |
| 1396 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1397 | return PyObject_Print(v, fp, flags); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1398 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1399 | writer = PyObject_GetAttrString(f, "write"); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1400 | if (writer == NULL) |
| 1401 | return -1; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1402 | if (flags & Py_PRINT_RAW) |
| 1403 | value = PyObject_Str(v); |
Guido van Rossum | c600411 | 1993-11-05 10:22:19 +0000 | [diff] [blame] | 1404 | else |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1405 | value = PyObject_Repr(v); |
Guido van Rossum | c600411 | 1993-11-05 10:22:19 +0000 | [diff] [blame] | 1406 | if (value == NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1407 | Py_DECREF(writer); |
Guido van Rossum | c600411 | 1993-11-05 10:22:19 +0000 | [diff] [blame] | 1408 | return -1; |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1409 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1410 | args = Py_BuildValue("(O)", value); |
Guido van Rossum | e9eec54 | 1997-05-22 14:02:25 +0000 | [diff] [blame] | 1411 | if (args == NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1412 | Py_DECREF(value); |
| 1413 | Py_DECREF(writer); |
Guido van Rossum | d3f9a1a | 1995-07-10 23:32:26 +0000 | [diff] [blame] | 1414 | return -1; |
| 1415 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1416 | result = PyEval_CallObject(writer, args); |
| 1417 | Py_DECREF(args); |
| 1418 | Py_DECREF(value); |
| 1419 | Py_DECREF(writer); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1420 | if (result == NULL) |
| 1421 | return -1; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1422 | Py_DECREF(result); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1423 | return 0; |
| 1424 | } |
| 1425 | |
Guido van Rossum | 27a60b1 | 1997-05-22 22:25:11 +0000 | [diff] [blame] | 1426 | int |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 1427 | PyFile_WriteString(char *s, PyObject *f) |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1428 | { |
| 1429 | if (f == NULL) { |
Guido van Rossum | 27a60b1 | 1997-05-22 22:25:11 +0000 | [diff] [blame] | 1430 | /* Should be caused by a pre-existing error */ |
Fred Drake | fd99de6 | 2000-07-09 05:02:18 +0000 | [diff] [blame] | 1431 | if (!PyErr_Occurred()) |
Guido van Rossum | 27a60b1 | 1997-05-22 22:25:11 +0000 | [diff] [blame] | 1432 | PyErr_SetString(PyExc_SystemError, |
| 1433 | "null file for PyFile_WriteString"); |
| 1434 | return -1; |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1435 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1436 | else if (PyFile_Check(f)) { |
| 1437 | FILE *fp = PyFile_AsFile(f); |
Guido van Rossum | 27a60b1 | 1997-05-22 22:25:11 +0000 | [diff] [blame] | 1438 | if (fp == NULL) { |
| 1439 | err_closed(); |
| 1440 | return -1; |
| 1441 | } |
| 1442 | fputs(s, fp); |
| 1443 | return 0; |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1444 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1445 | else if (!PyErr_Occurred()) { |
| 1446 | PyObject *v = PyString_FromString(s); |
Guido van Rossum | 27a60b1 | 1997-05-22 22:25:11 +0000 | [diff] [blame] | 1447 | int err; |
| 1448 | if (v == NULL) |
| 1449 | return -1; |
| 1450 | err = PyFile_WriteObject(v, f, Py_PRINT_RAW); |
| 1451 | Py_DECREF(v); |
| 1452 | return err; |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1453 | } |
Guido van Rossum | 74ba247 | 1997-07-13 03:56:50 +0000 | [diff] [blame] | 1454 | else |
| 1455 | return -1; |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame] | 1456 | } |
Andrew M. Kuchling | 06051ed | 2000-07-13 23:56:54 +0000 | [diff] [blame] | 1457 | |
| 1458 | /* Try to get a file-descriptor from a Python object. If the object |
| 1459 | is an integer or long integer, its value is returned. If not, the |
| 1460 | object's fileno() method is called if it exists; the method must return |
| 1461 | an integer or long integer, which is returned as the file descriptor value. |
| 1462 | -1 is returned on failure. |
| 1463 | */ |
| 1464 | |
| 1465 | int PyObject_AsFileDescriptor(PyObject *o) |
| 1466 | { |
| 1467 | int fd; |
| 1468 | PyObject *meth; |
| 1469 | |
| 1470 | if (PyInt_Check(o)) { |
| 1471 | fd = PyInt_AsLong(o); |
| 1472 | } |
| 1473 | else if (PyLong_Check(o)) { |
| 1474 | fd = PyLong_AsLong(o); |
| 1475 | } |
| 1476 | else if ((meth = PyObject_GetAttrString(o, "fileno")) != NULL) |
| 1477 | { |
| 1478 | PyObject *fno = PyEval_CallObject(meth, NULL); |
| 1479 | Py_DECREF(meth); |
| 1480 | if (fno == NULL) |
| 1481 | return -1; |
Tim Peters | 86821b2 | 2001-01-07 21:19:34 +0000 | [diff] [blame] | 1482 | |
Andrew M. Kuchling | 06051ed | 2000-07-13 23:56:54 +0000 | [diff] [blame] | 1483 | if (PyInt_Check(fno)) { |
| 1484 | fd = PyInt_AsLong(fno); |
| 1485 | Py_DECREF(fno); |
| 1486 | } |
| 1487 | else if (PyLong_Check(fno)) { |
| 1488 | fd = PyLong_AsLong(fno); |
| 1489 | Py_DECREF(fno); |
| 1490 | } |
| 1491 | else { |
| 1492 | PyErr_SetString(PyExc_TypeError, |
| 1493 | "fileno() returned a non-integer"); |
| 1494 | Py_DECREF(fno); |
| 1495 | return -1; |
| 1496 | } |
| 1497 | } |
| 1498 | else { |
| 1499 | PyErr_SetString(PyExc_TypeError, |
| 1500 | "argument must be an int, or have a fileno() method."); |
| 1501 | return -1; |
| 1502 | } |
| 1503 | |
| 1504 | if (fd < 0) { |
| 1505 | PyErr_Format(PyExc_ValueError, |
| 1506 | "file descriptor cannot be a negative integer (%i)", |
| 1507 | fd); |
| 1508 | return -1; |
| 1509 | } |
| 1510 | return fd; |
| 1511 | } |
| 1512 | |
| 1513 | |
| 1514 | |