cpython-lru_cache-weakref: Objects/bufferobject.c annotate

annotate Objects/bufferobject.c @ 39496:352ffe77b71d legacy-trunk

Patch #1535500: fix segfault in BZ2File.writelines and make sure it raises the correct exceptions.

author	Georg Brandl <georg@python.org>
date	Mon, 14 Aug 2006 21:42:55 +0000
parents	997788de8667
children	1bbcd392417d

rev	line source
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	1
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	2 /* Buffer object implementation */
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	3
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	4 #include "Python.h"
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	5
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	6
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	7 typedef struct {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	8 PyObject_HEAD
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	9 PyObject *b_base;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	10 void *b_ptr;
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	11 Py_ssize_t b_size;
7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	12 Py_ssize_t b_offset;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	13 int b_readonly;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	14 long b_hash;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	15 } PyBufferObject;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	16
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	17
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	18 enum buffer_t {
38693 72e37ada4170 Fix inconsistency in naming within an enum. Brett Cannon <bcannon@gmail.com> parents: 38676 diff changeset	19 READ_BUFFER,
72e37ada4170 Fix inconsistency in naming within an enum. Brett Cannon <bcannon@gmail.com> parents: 38676 diff changeset	20 WRITE_BUFFER,
72e37ada4170 Fix inconsistency in naming within an enum. Brett Cannon <bcannon@gmail.com> parents: 38676 diff changeset	21 CHAR_BUFFER,
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	22 ANY_BUFFER,
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	23 };
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	24
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	25 static int
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	26 get_buf(PyBufferObject self, void ptr, Py_ssize_t size,
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	27 enum buffer_t buffer_type)
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	28 {
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	29 if (self->b_base == NULL) {
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	30 assert (ptr != NULL);
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	31 *ptr = self->b_ptr;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	32 *size = self->b_size;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	33 }
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	34 else {
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	35 Py_ssize_t count, offset;
38731 0b3fe2b734a1 Suppress warning on MacOSX about possible use before set of proc. Skip Montanaro <skip@pobox.com> parents: 38693 diff changeset	36 readbufferproc proc = 0;
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	37 PyBufferProcs *bp = self->b_base->ob_type->tp_as_buffer;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	38 if ((*bp->bf_getsegcount)(self->b_base, NULL) != 1) {
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	39 PyErr_SetString(PyExc_TypeError,
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	40 "single-segment buffer object expected");
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	41 return 0;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	42 }
38693 72e37ada4170 Fix inconsistency in naming within an enum. Brett Cannon <bcannon@gmail.com> parents: 38676 diff changeset	43 if ((buffer_type == READ_BUFFER) \|\|
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	44 ((buffer_type == ANY_BUFFER) && self->b_readonly))
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	45 proc = bp->bf_getreadbuffer;
38693 72e37ada4170 Fix inconsistency in naming within an enum. Brett Cannon <bcannon@gmail.com> parents: 38676 diff changeset	46 else if ((buffer_type == WRITE_BUFFER) \|\|
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	47 (buffer_type == ANY_BUFFER))
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	48 proc = (readbufferproc)bp->bf_getwritebuffer;
38693 72e37ada4170 Fix inconsistency in naming within an enum. Brett Cannon <bcannon@gmail.com> parents: 38676 diff changeset	49 else if (buffer_type == CHAR_BUFFER) {
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	50 if (!PyType_HasFeature(self->ob_type,
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	51 Py_TPFLAGS_HAVE_GETCHARBUFFER)) {
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	52 PyErr_SetString(PyExc_TypeError,
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	53 "Py_TPFLAGS_HAVE_GETCHARBUFFER needed");
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	54 return 0;
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	55 }
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	56 proc = (readbufferproc)bp->bf_getcharbuffer;
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	57 }
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	58 if (!proc) {
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	59 char *buffer_type_name;
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	60 switch (buffer_type) {
38693 72e37ada4170 Fix inconsistency in naming within an enum. Brett Cannon <bcannon@gmail.com> parents: 38676 diff changeset	61 case READ_BUFFER:
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	62 buffer_type_name = "read";
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	63 break;
38693 72e37ada4170 Fix inconsistency in naming within an enum. Brett Cannon <bcannon@gmail.com> parents: 38676 diff changeset	64 case WRITE_BUFFER:
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	65 buffer_type_name = "write";
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	66 break;
38693 72e37ada4170 Fix inconsistency in naming within an enum. Brett Cannon <bcannon@gmail.com> parents: 38676 diff changeset	67 case CHAR_BUFFER:
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	68 buffer_type_name = "char";
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	69 break;
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	70 default:
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	71 buffer_type_name = "no";
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	72 break;
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	73 }
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	74 PyErr_Format(PyExc_TypeError,
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	75 "%s buffer type not available",
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	76 buffer_type_name);
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	77 return 0;
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	78 }
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	79 if ((count = (*proc)(self->b_base, 0, ptr)) < 0)
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	80 return 0;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	81 /* apply constraints to the start/end */
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	82 if (self->b_offset > count)
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	83 offset = count;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	84 else
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	85 offset = self->b_offset;
31810 7a120400888a Correct code to advance ptr to be well-formed C. Martin v. Löwis <martin@v.loewis.de> parents: 31640 diff changeset	86 (char )ptr = (char **)ptr + offset;
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	87 if (self->b_size == Py_END_OF_BUFFER)
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	88 *size = count;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	89 else
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	90 *size = self->b_size;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	91 if (offset + *size > count)
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	92 *size = count - offset;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	93 }
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	94 return 1;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	95 }
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	96
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	97
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	98 static PyObject *
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	99 buffer_from_memory(PyObject base, Py_ssize_t size, Py_ssize_t offset, void ptr,
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	100 int readonly)
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	101 {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	102 PyBufferObject * b;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	103
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	104 if (size < 0 && size != Py_END_OF_BUFFER) {
10427 e6799a855af7 Added check for negative offset for PyBuffer_FromObject and check for Guido van Rossum <guido@python.org> parents: 9305 diff changeset	105 PyErr_SetString(PyExc_ValueError,
e6799a855af7 Added check for negative offset for PyBuffer_FromObject and check for Guido van Rossum <guido@python.org> parents: 9305 diff changeset	106 "size must be zero or positive");
e6799a855af7 Added check for negative offset for PyBuffer_FromObject and check for Guido van Rossum <guido@python.org> parents: 9305 diff changeset	107 return NULL;
e6799a855af7 Added check for negative offset for PyBuffer_FromObject and check for Guido van Rossum <guido@python.org> parents: 9305 diff changeset	108 }
33559 be8cff4a1eca Fix buffer offset calculation (need to compute it before changing Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31810 diff changeset	109 if (offset < 0) {
be8cff4a1eca Fix buffer offset calculation (need to compute it before changing Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31810 diff changeset	110 PyErr_SetString(PyExc_ValueError,
be8cff4a1eca Fix buffer offset calculation (need to compute it before changing Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31810 diff changeset	111 "offset must be zero or positive");
be8cff4a1eca Fix buffer offset calculation (need to compute it before changing Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31810 diff changeset	112 return NULL;
be8cff4a1eca Fix buffer offset calculation (need to compute it before changing Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31810 diff changeset	113 }
10427 e6799a855af7 Added check for negative offset for PyBuffer_FromObject and check for Guido van Rossum <guido@python.org> parents: 9305 diff changeset	114
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	115 b = PyObject_NEW(PyBufferObject, &PyBuffer_Type);
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	116 if ( b == NULL )
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	117 return NULL;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	118
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	119 Py_XINCREF(base);
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	120 b->b_base = base;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	121 b->b_ptr = ptr;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	122 b->b_size = size;
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	123 b->b_offset = offset;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	124 b->b_readonly = readonly;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	125 b->b_hash = -1;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	126
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	127 return (PyObject *) b;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	128 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	129
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	130 static PyObject *
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	131 buffer_from_object(PyObject *base, Py_ssize_t size, Py_ssize_t offset, int readonly)
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	132 {
33560 97cb9eea212e Ensure negative offsets cannot be passed to buffer(). When composing Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 33559 diff changeset	133 if (offset < 0) {
97cb9eea212e Ensure negative offsets cannot be passed to buffer(). When composing Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 33559 diff changeset	134 PyErr_SetString(PyExc_ValueError,
97cb9eea212e Ensure negative offsets cannot be passed to buffer(). When composing Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 33559 diff changeset	135 "offset must be zero or positive");
97cb9eea212e Ensure negative offsets cannot be passed to buffer(). When composing Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 33559 diff changeset	136 return NULL;
97cb9eea212e Ensure negative offsets cannot be passed to buffer(). When composing Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 33559 diff changeset	137 }
33559 be8cff4a1eca Fix buffer offset calculation (need to compute it before changing Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31810 diff changeset	138 if ( PyBuffer_Check(base) && (((PyBufferObject *)base)->b_base) ) {
be8cff4a1eca Fix buffer offset calculation (need to compute it before changing Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31810 diff changeset	139 /* another buffer, refer to the base object */
33560 97cb9eea212e Ensure negative offsets cannot be passed to buffer(). When composing Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 33559 diff changeset	140 PyBufferObject b = (PyBufferObject )base;
97cb9eea212e Ensure negative offsets cannot be passed to buffer(). When composing Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 33559 diff changeset	141 if (b->b_size != Py_END_OF_BUFFER) {
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	142 Py_ssize_t base_size = b->b_size - offset;
33560 97cb9eea212e Ensure negative offsets cannot be passed to buffer(). When composing Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 33559 diff changeset	143 if (base_size < 0)
97cb9eea212e Ensure negative offsets cannot be passed to buffer(). When composing Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 33559 diff changeset	144 base_size = 0;
97cb9eea212e Ensure negative offsets cannot be passed to buffer(). When composing Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 33559 diff changeset	145 if (size == Py_END_OF_BUFFER \|\| size > base_size)
97cb9eea212e Ensure negative offsets cannot be passed to buffer(). When composing Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 33559 diff changeset	146 size = base_size;
97cb9eea212e Ensure negative offsets cannot be passed to buffer(). When composing Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 33559 diff changeset	147 }
97cb9eea212e Ensure negative offsets cannot be passed to buffer(). When composing Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 33559 diff changeset	148 offset += b->b_offset;
97cb9eea212e Ensure negative offsets cannot be passed to buffer(). When composing Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 33559 diff changeset	149 base = b->b_base;
10427 e6799a855af7 Added check for negative offset for PyBuffer_FromObject and check for Guido van Rossum <guido@python.org> parents: 9305 diff changeset	150 }
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	151 return buffer_from_memory(base, size, offset, NULL, readonly);
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	152 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	153
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	154
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	155 PyObject *
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	156 PyBuffer_FromObject(PyObject *base, Py_ssize_t offset, Py_ssize_t size)
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	157 {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	158 PyBufferProcs *pb = base->ob_type->tp_as_buffer;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	159
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	160 if ( pb == NULL \|\|
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	161 pb->bf_getreadbuffer == NULL \|\|
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	162 pb->bf_getsegcount == NULL )
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	163 {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	164 PyErr_SetString(PyExc_TypeError, "buffer object expected");
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	165 return NULL;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	166 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	167
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	168 return buffer_from_object(base, size, offset, 1);
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	169 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	170
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	171 PyObject *
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	172 PyBuffer_FromReadWriteObject(PyObject *base, Py_ssize_t offset, Py_ssize_t size)
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	173 {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	174 PyBufferProcs *pb = base->ob_type->tp_as_buffer;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	175
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	176 if ( pb == NULL \|\|
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	177 pb->bf_getwritebuffer == NULL \|\|
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	178 pb->bf_getsegcount == NULL )
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	179 {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	180 PyErr_SetString(PyExc_TypeError, "buffer object expected");
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	181 return NULL;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	182 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	183
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	184 return buffer_from_object(base, size, offset, 0);
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	185 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	186
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	187 PyObject *
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	188 PyBuffer_FromMemory(void *ptr, Py_ssize_t size)
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	189 {
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	190 return buffer_from_memory(NULL, size, 0, ptr, 1);
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	191 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	192
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	193 PyObject *
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	194 PyBuffer_FromReadWriteMemory(void *ptr, Py_ssize_t size)
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	195 {
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	196 return buffer_from_memory(NULL, size, 0, ptr, 0);
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	197 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	198
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	199 PyObject *
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	200 PyBuffer_New(Py_ssize_t size)
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	201 {
13861 f3d5f71ccbb4 Removing warnings found by gcc -Wall Moshe Zadka <moshez@math.huji.ac.il> parents: 13449 diff changeset	202 PyObject *o;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	203 PyBufferObject * b;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	204
11175 fab81df566d0 PyBuffer_New(): Raise ValueError if size is negative (the other Fred Drake <fdrake@acm.org> parents: 10460 diff changeset	205 if (size < 0) {
fab81df566d0 PyBuffer_New(): Raise ValueError if size is negative (the other Fred Drake <fdrake@acm.org> parents: 10460 diff changeset	206 PyErr_SetString(PyExc_ValueError,
fab81df566d0 PyBuffer_New(): Raise ValueError if size is negative (the other Fred Drake <fdrake@acm.org> parents: 10460 diff changeset	207 "size must be zero or positive");
fab81df566d0 PyBuffer_New(): Raise ValueError if size is negative (the other Fred Drake <fdrake@acm.org> parents: 10460 diff changeset	208 return NULL;
fab81df566d0 PyBuffer_New(): Raise ValueError if size is negative (the other Fred Drake <fdrake@acm.org> parents: 10460 diff changeset	209 }
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	210 /* XXX: check for overflow in multiply */
24898 a869d2de536f Call me anal, but there was a particular phrase that was speading to Guido van Rossum <guido@python.org> parents: 23972 diff changeset	211 /* Inline PyObject_New */
37589 aeee85b6a5dd More C++-compliance. Note especially listobject.c - to get C++ to accept the Anthony Baxter <anthonybaxter@gmail.com> parents: 36533 diff changeset	212 o = (PyObject )PyObject_MALLOC(sizeof(b) + size);
13861 f3d5f71ccbb4 Removing warnings found by gcc -Wall Moshe Zadka <moshez@math.huji.ac.il> parents: 13449 diff changeset	213 if ( o == NULL )
11175 fab81df566d0 PyBuffer_New(): Raise ValueError if size is negative (the other Fred Drake <fdrake@acm.org> parents: 10460 diff changeset	214 return PyErr_NoMemory();
13861 f3d5f71ccbb4 Removing warnings found by gcc -Wall Moshe Zadka <moshez@math.huji.ac.il> parents: 13449 diff changeset	215 b = (PyBufferObject *) PyObject_INIT(o, &PyBuffer_Type);
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	216
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	217 b->b_base = NULL;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	218 b->b_ptr = (void *)(b + 1);
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	219 b->b_size = size;
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	220 b->b_offset = 0;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	221 b->b_readonly = 0;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	222 b->b_hash = -1;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	223
13861 f3d5f71ccbb4 Removing warnings found by gcc -Wall Moshe Zadka <moshez@math.huji.ac.il> parents: 13449 diff changeset	224 return o;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	225 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	226
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	227 /* Methods */
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	228
23868 8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	229 static PyObject *
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	230 buffer_new(PyTypeObject type, PyObject args, PyObject *kw)
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	231 {
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	232 PyObject *ob;
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	233 Py_ssize_t offset = 0;
7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	234 Py_ssize_t size = Py_END_OF_BUFFER;
23868 8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	235
35450 97c97194e64b Disallow keyword arguments for type constructors that don't use them Georg Brandl <georg@python.org> parents: 33560 diff changeset	236 if (!_PyArg_NoKeywords("buffer()", kw))
97c97194e64b Disallow keyword arguments for type constructors that don't use them Georg Brandl <georg@python.org> parents: 33560 diff changeset	237 return NULL;
97c97194e64b Disallow keyword arguments for type constructors that don't use them Georg Brandl <georg@python.org> parents: 33560 diff changeset	238
36533 ed07c1a5e24c Use proper PyArg_Parse format char for Py_ssize_t, instead of 'l', in Thomas Wouters <thomas@python.org> parents: 36511 diff changeset	239 if (!PyArg_ParseTuple(args, "O\|nn:buffer", &ob, &offset, &size))
23868 8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	240 return NULL;
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	241 return PyBuffer_FromObject(ob, offset, size);
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	242 }
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	243
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	244 PyDoc_STRVAR(buffer_doc,
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	245 "buffer(object [, offset[, size]])\n\
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	246 \n\
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	247 Create a new buffer object which references the given object.\n\
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	248 The buffer will reference a slice of the target object from the\n\
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	249 start of the object (or at the specified offset). The slice will\n\
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	250 extend to the end of the target object (or with the specified size).");
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	251
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	252
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	253 static void
13449 0409a98cd582 ANSI-fication of the sources. Fred Drake <fdrake@acm.org> parents: 13256 diff changeset	254 buffer_dealloc(PyBufferObject *self)
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	255 {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	256 Py_XDECREF(self->b_base);
12576 1c7c2dd1beb1 Vladimir Marangozov's long-awaited malloc restructuring. Guido van Rossum <guido@python.org> parents: 11175 diff changeset	257 PyObject_DEL(self);
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	258 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	259
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	260 static int
13449 0409a98cd582 ANSI-fication of the sources. Fred Drake <fdrake@acm.org> parents: 13256 diff changeset	261 buffer_compare(PyBufferObject self, PyBufferObject other)
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	262 {
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	263 void p1, p2;
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	264 Py_ssize_t len_self, len_other, min_len;
7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	265 int cmp;
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	266
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	267 if (!get_buf(self, &p1, &len_self, ANY_BUFFER))
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	268 return -1;
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	269 if (!get_buf(other, &p2, &len_other, ANY_BUFFER))
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	270 return -1;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	271 min_len = (len_self < len_other) ? len_self : len_other;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	272 if (min_len > 0) {
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	273 cmp = memcmp(p1, p2, min_len);
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	274 if (cmp != 0)
39395 997788de8667 memcmp() can return values other than -1, 0, and +1 but tp_compare Thomas Heller <theller@ctypes.org> parents: 38731 diff changeset	275 return cmp < 0 ? -1 : 1;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	276 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	277 return (len_self < len_other) ? -1 : (len_self > len_other) ? 1 : 0;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	278 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	279
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	280 static PyObject *
13449 0409a98cd582 ANSI-fication of the sources. Fred Drake <fdrake@acm.org> parents: 13256 diff changeset	281 buffer_repr(PyBufferObject *self)
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	282 {
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	283 const char *status = self->b_readonly ? "read-only" : "read-write";
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	284
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	285 if ( self->b_base == NULL )
36510 0f3894bb2ada Support %zd in PyErr_Format and PyString_FromFormat. Martin v. Löwis <martin@v.loewis.de> parents: 36509 diff changeset	286 return PyString_FromFormat("<%s buffer ptr %p, size %zd at %p>",
19476 0e70df98424e repr's converted to using PyString_FromFormat() instead of sprintf'ing Barry Warsaw <barry@python.org> parents: 18933 diff changeset	287 status,
0e70df98424e repr's converted to using PyString_FromFormat() instead of sprintf'ing Barry Warsaw <barry@python.org> parents: 18933 diff changeset	288 self->b_ptr,
36511 1596ff5c79b5 Revert 42400. Martin v. Löwis <martin@v.loewis.de> parents: 36510 diff changeset	289 self->b_size,
19476 0e70df98424e repr's converted to using PyString_FromFormat() instead of sprintf'ing Barry Warsaw <barry@python.org> parents: 18933 diff changeset	290 self);
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	291 else
19476 0e70df98424e repr's converted to using PyString_FromFormat() instead of sprintf'ing Barry Warsaw <barry@python.org> parents: 18933 diff changeset	292 return PyString_FromFormat(
36510 0f3894bb2ada Support %zd in PyErr_Format and PyString_FromFormat. Martin v. Löwis <martin@v.loewis.de> parents: 36509 diff changeset	293 "<%s buffer for %p, size %zd, offset %zd at %p>",
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	294 status,
13210 ff243b0f16ee Trent Mick <trentm@activestate.com>: Fred Drake <fdrake@acm.org> parents: 12576 diff changeset	295 self->b_base,
36511 1596ff5c79b5 Revert 42400. Martin v. Löwis <martin@v.loewis.de> parents: 36510 diff changeset	296 self->b_size,
1596ff5c79b5 Revert 42400. Martin v. Löwis <martin@v.loewis.de> parents: 36510 diff changeset	297 self->b_offset,
13210 ff243b0f16ee Trent Mick <trentm@activestate.com>: Fred Drake <fdrake@acm.org> parents: 12576 diff changeset	298 self);
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	299 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	300
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	301 static long
13449 0409a98cd582 ANSI-fication of the sources. Fred Drake <fdrake@acm.org> parents: 13256 diff changeset	302 buffer_hash(PyBufferObject *self)
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	303 {
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	304 void *ptr;
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	305 Py_ssize_t size;
7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	306 register Py_ssize_t len;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	307 register unsigned char *p;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	308 register long x;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	309
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	310 if ( self->b_hash != -1 )
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	311 return self->b_hash;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	312
31639 047148089c35 Document one of the many problems with the buffer object. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31638 diff changeset	313 /* XXX potential bugs here, a readonly buffer does not imply that the
047148089c35 Document one of the many problems with the buffer object. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31638 diff changeset	314 * underlying memory is immutable. b_readonly is a necessary but not
047148089c35 Document one of the many problems with the buffer object. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31638 diff changeset	315 * sufficient condition for a buffer to be hashable. Perhaps it would
047148089c35 Document one of the many problems with the buffer object. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31638 diff changeset	316 * be better to only allow hashing if the underlying object is known to
047148089c35 Document one of the many problems with the buffer object. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31638 diff changeset	317 * be immutable (e.g. PyString_Check() is true). Another idea would
047148089c35 Document one of the many problems with the buffer object. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31638 diff changeset	318 * be to call tp_hash on the underlying object and see if it raises
047148089c35 Document one of the many problems with the buffer object. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31638 diff changeset	319 * an error. */
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	320 if ( !self->b_readonly )
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	321 {
31639 047148089c35 Document one of the many problems with the buffer object. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31638 diff changeset	322 PyErr_SetString(PyExc_TypeError,
047148089c35 Document one of the many problems with the buffer object. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31638 diff changeset	323 "writable buffers are not hashable");
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	324 return -1;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	325 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	326
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	327 if (!get_buf(self, &ptr, &size, ANY_BUFFER))
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	328 return -1;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	329 p = (unsigned char *) ptr;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	330 len = size;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	331 x = *p << 7;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	332 while (--len >= 0)
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	333 x = (1000003x) ^ p++;
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	334 x ^= size;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	335 if (x == -1)
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	336 x = -2;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	337 self->b_hash = x;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	338 return x;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	339 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	340
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	341 static PyObject *
13449 0409a98cd582 ANSI-fication of the sources. Fred Drake <fdrake@acm.org> parents: 13256 diff changeset	342 buffer_str(PyBufferObject *self)
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	343 {
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	344 void *ptr;
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	345 Py_ssize_t size;
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	346 if (!get_buf(self, &ptr, &size, ANY_BUFFER))
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	347 return NULL;
37589 aeee85b6a5dd More C++-compliance. Note especially listobject.c - to get C++ to accept the Anthony Baxter <anthonybaxter@gmail.com> parents: 36533 diff changeset	348 return PyString_FromStringAndSize((const char *)ptr, size);
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	349 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	350
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	351 /* Sequence methods */
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	352
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	353 static Py_ssize_t
13449 0409a98cd582 ANSI-fication of the sources. Fred Drake <fdrake@acm.org> parents: 13256 diff changeset	354 buffer_length(PyBufferObject *self)
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	355 {
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	356 void *ptr;
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	357 Py_ssize_t size;
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	358 if (!get_buf(self, &ptr, &size, ANY_BUFFER))
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	359 return -1;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	360 return size;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	361 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	362
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	363 static PyObject *
13449 0409a98cd582 ANSI-fication of the sources. Fred Drake <fdrake@acm.org> parents: 13256 diff changeset	364 buffer_concat(PyBufferObject self, PyObject other)
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	365 {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	366 PyBufferProcs *pb = other->ob_type->tp_as_buffer;
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	367 void ptr1, ptr2;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	368 char *p;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	369 PyObject *ob;
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	370 Py_ssize_t size, count;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	371
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	372 if ( pb == NULL \|\|
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	373 pb->bf_getreadbuffer == NULL \|\|
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	374 pb->bf_getsegcount == NULL )
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	375 {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	376 PyErr_BadArgument();
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	377 return NULL;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	378 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	379 if ( (*pb->bf_getsegcount)(other, NULL) != 1 )
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	380 {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	381 /* ### use a different exception type/message? */
10460 62781914fadb Folded long lines. Guido van Rossum <guido@python.org> parents: 10427 diff changeset	382 PyErr_SetString(PyExc_TypeError,
62781914fadb Folded long lines. Guido van Rossum <guido@python.org> parents: 10427 diff changeset	383 "single-segment buffer object expected");
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	384 return NULL;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	385 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	386
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	387 if (!get_buf(self, &ptr1, &size, ANY_BUFFER))
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	388 return NULL;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	389
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	390 /* optimize special case */
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	391 if ( size == 0 )
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	392 {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	393 Py_INCREF(other);
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	394 return other;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	395 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	396
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	397 if ( (count = (*pb->bf_getreadbuffer)(other, 0, &ptr2)) < 0 )
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	398 return NULL;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	399
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	400 ob = PyString_FromStringAndSize(NULL, size + count);
36082 3f358afbb3d3 Check return result for error Neal Norwitz <nnorwitz@gmail.com> parents: 35450 diff changeset	401 if ( ob == NULL )
3f358afbb3d3 Check return result for error Neal Norwitz <nnorwitz@gmail.com> parents: 35450 diff changeset	402 return NULL;
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	403 p = PyString_AS_STRING(ob);
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	404 memcpy(p, ptr1, size);
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	405 memcpy(p + size, ptr2, count);
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	406
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	407 /* there is an extra byte in the string object, so this is safe */
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	408 p[size + count] = '\0';
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	409
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	410 return ob;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	411 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	412
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	413 static PyObject *
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	414 buffer_repeat(PyBufferObject *self, Py_ssize_t count)
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	415 {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	416 PyObject *ob;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	417 register char *p;
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	418 void *ptr;
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	419 Py_ssize_t size;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	420
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	421 if ( count < 0 )
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	422 count = 0;
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	423 if (!get_buf(self, &ptr, &size, ANY_BUFFER))
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	424 return NULL;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	425 ob = PyString_FromStringAndSize(NULL, size * count);
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	426 if ( ob == NULL )
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	427 return NULL;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	428
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	429 p = PyString_AS_STRING(ob);
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	430 while ( count-- )
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	431 {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	432 memcpy(p, ptr, size);
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	433 p += size;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	434 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	435
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	436 /* there is an extra byte in the string object, so this is safe */
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	437 *p = '\0';
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	438
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	439 return ob;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	440 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	441
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	442 static PyObject *
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	443 buffer_item(PyBufferObject *self, Py_ssize_t idx)
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	444 {
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	445 void *ptr;
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	446 Py_ssize_t size;
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	447 if (!get_buf(self, &ptr, &size, ANY_BUFFER))
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	448 return NULL;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	449 if ( idx < 0 \|\| idx >= size ) {
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	450 PyErr_SetString(PyExc_IndexError, "buffer index out of range");
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	451 return NULL;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	452 }
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	453 return PyString_FromStringAndSize((char *)ptr + idx, 1);
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	454 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	455
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	456 static PyObject *
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	457 buffer_slice(PyBufferObject *self, Py_ssize_t left, Py_ssize_t right)
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	458 {
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	459 void *ptr;
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	460 Py_ssize_t size;
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	461 if (!get_buf(self, &ptr, &size, ANY_BUFFER))
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	462 return NULL;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	463 if ( left < 0 )
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	464 left = 0;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	465 if ( right < 0 )
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	466 right = 0;
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	467 if ( right > size )
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	468 right = size;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	469 if ( right < left )
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	470 right = left;
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	471 return PyString_FromStringAndSize((char *)ptr + left,
10460 62781914fadb Folded long lines. Guido van Rossum <guido@python.org> parents: 10427 diff changeset	472 right - left);
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	473 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	474
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	475 static int
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	476 buffer_ass_item(PyBufferObject self, Py_ssize_t idx, PyObject other)
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	477 {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	478 PyBufferProcs *pb;
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	479 void ptr1, ptr2;
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	480 Py_ssize_t size;
7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	481 Py_ssize_t count;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	482
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	483 if ( self->b_readonly ) {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	484 PyErr_SetString(PyExc_TypeError,
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	485 "buffer is read-only");
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	486 return -1;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	487 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	488
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	489 if (!get_buf(self, &ptr1, &size, ANY_BUFFER))
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	490 return -1;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	491
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	492 if (idx < 0 \|\| idx >= size) {
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	493 PyErr_SetString(PyExc_IndexError,
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	494 "buffer assignment index out of range");
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	495 return -1;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	496 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	497
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	498 pb = other ? other->ob_type->tp_as_buffer : NULL;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	499 if ( pb == NULL \|\|
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	500 pb->bf_getreadbuffer == NULL \|\|
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	501 pb->bf_getsegcount == NULL )
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	502 {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	503 PyErr_BadArgument();
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	504 return -1;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	505 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	506 if ( (*pb->bf_getsegcount)(other, NULL) != 1 )
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	507 {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	508 /* ### use a different exception type/message? */
10460 62781914fadb Folded long lines. Guido van Rossum <guido@python.org> parents: 10427 diff changeset	509 PyErr_SetString(PyExc_TypeError,
62781914fadb Folded long lines. Guido van Rossum <guido@python.org> parents: 10427 diff changeset	510 "single-segment buffer object expected");
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	511 return -1;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	512 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	513
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	514 if ( (count = (*pb->bf_getreadbuffer)(other, 0, &ptr2)) < 0 )
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	515 return -1;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	516 if ( count != 1 ) {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	517 PyErr_SetString(PyExc_TypeError,
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	518 "right operand must be a single byte");
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	519 return -1;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	520 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	521
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	522 ((char )ptr1)[idx] = (char *)ptr2;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	523 return 0;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	524 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	525
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	526 static int
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	527 buffer_ass_slice(PyBufferObject self, Py_ssize_t left, Py_ssize_t right, PyObject other)
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	528 {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	529 PyBufferProcs *pb;
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	530 void ptr1, ptr2;
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	531 Py_ssize_t size;
7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	532 Py_ssize_t slice_len;
7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	533 Py_ssize_t count;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	534
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	535 if ( self->b_readonly ) {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	536 PyErr_SetString(PyExc_TypeError,
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	537 "buffer is read-only");
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	538 return -1;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	539 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	540
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	541 pb = other ? other->ob_type->tp_as_buffer : NULL;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	542 if ( pb == NULL \|\|
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	543 pb->bf_getreadbuffer == NULL \|\|
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	544 pb->bf_getsegcount == NULL )
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	545 {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	546 PyErr_BadArgument();
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	547 return -1;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	548 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	549 if ( (*pb->bf_getsegcount)(other, NULL) != 1 )
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	550 {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	551 /* ### use a different exception type/message? */
10460 62781914fadb Folded long lines. Guido van Rossum <guido@python.org> parents: 10427 diff changeset	552 PyErr_SetString(PyExc_TypeError,
62781914fadb Folded long lines. Guido van Rossum <guido@python.org> parents: 10427 diff changeset	553 "single-segment buffer object expected");
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	554 return -1;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	555 }
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	556 if (!get_buf(self, &ptr1, &size, ANY_BUFFER))
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	557 return -1;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	558 if ( (count = (*pb->bf_getreadbuffer)(other, 0, &ptr2)) < 0 )
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	559 return -1;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	560
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	561 if ( left < 0 )
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	562 left = 0;
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	563 else if ( left > size )
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	564 left = size;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	565 if ( right < left )
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	566 right = left;
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	567 else if ( right > size )
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	568 right = size;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	569 slice_len = right - left;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	570
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	571 if ( count != slice_len ) {
10460 62781914fadb Folded long lines. Guido van Rossum <guido@python.org> parents: 10427 diff changeset	572 PyErr_SetString(
62781914fadb Folded long lines. Guido van Rossum <guido@python.org> parents: 10427 diff changeset	573 PyExc_TypeError,
62781914fadb Folded long lines. Guido van Rossum <guido@python.org> parents: 10427 diff changeset	574 "right operand length must match slice length");
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	575 return -1;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	576 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	577
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	578 if ( slice_len )
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	579 memcpy((char *)ptr1 + left, ptr2, slice_len);
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	580
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	581 return 0;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	582 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	583
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	584 /* Buffer methods */
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	585
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	586 static Py_ssize_t
7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	587 buffer_getreadbuf(PyBufferObject self, Py_ssize_t idx, void *pp)
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	588 {
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	589 Py_ssize_t size;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	590 if ( idx != 0 ) {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	591 PyErr_SetString(PyExc_SystemError,
9305 083efa076366 Greg Stein: Implement the new bf_getcharbuffer function, indicating Guido van Rossum <guido@python.org> parents: 9286 diff changeset	592 "accessing non-existent buffer segment");
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	593 return -1;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	594 }
38693 72e37ada4170 Fix inconsistency in naming within an enum. Brett Cannon <bcannon@gmail.com> parents: 38676 diff changeset	595 if (!get_buf(self, pp, &size, READ_BUFFER))
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	596 return -1;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	597 return size;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	598 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	599
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	600 static Py_ssize_t
7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	601 buffer_getwritebuf(PyBufferObject self, Py_ssize_t idx, void *pp)
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	602 {
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	603 Py_ssize_t size;
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	604
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	605 if ( self->b_readonly )
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	606 {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	607 PyErr_SetString(PyExc_TypeError, "buffer is read-only");
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	608 return -1;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	609 }
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	610
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	611 if ( idx != 0 ) {
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	612 PyErr_SetString(PyExc_SystemError,
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	613 "accessing non-existent buffer segment");
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	614 return -1;
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	615 }
38693 72e37ada4170 Fix inconsistency in naming within an enum. Brett Cannon <bcannon@gmail.com> parents: 38676 diff changeset	616 if (!get_buf(self, pp, &size, WRITE_BUFFER))
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	617 return -1;
5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	618 return size;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	619 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	620
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	621 static Py_ssize_t
7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	622 buffer_getsegcount(PyBufferObject self, Py_ssize_t lenp)
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	623 {
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	624 void *ptr;
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	625 Py_ssize_t size;
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	626 if (!get_buf(self, &ptr, &size, ANY_BUFFER))
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	627 return -1;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	628 if (lenp)
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	629 *lenp = size;
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	630 return 1;
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	631 }
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	632
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	633 static Py_ssize_t
7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	634 buffer_getcharbuf(PyBufferObject self, Py_ssize_t idx, const char *pp)
9305 083efa076366 Greg Stein: Implement the new bf_getcharbuffer function, indicating Guido van Rossum <guido@python.org> parents: 9286 diff changeset	635 {
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	636 void *ptr;
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	637 Py_ssize_t size;
9305 083efa076366 Greg Stein: Implement the new bf_getcharbuffer function, indicating Guido van Rossum <guido@python.org> parents: 9286 diff changeset	638 if ( idx != 0 ) {
083efa076366 Greg Stein: Implement the new bf_getcharbuffer function, indicating Guido van Rossum <guido@python.org> parents: 9286 diff changeset	639 PyErr_SetString(PyExc_SystemError,
083efa076366 Greg Stein: Implement the new bf_getcharbuffer function, indicating Guido van Rossum <guido@python.org> parents: 9286 diff changeset	640 "accessing non-existent buffer segment");
083efa076366 Greg Stein: Implement the new bf_getcharbuffer function, indicating Guido van Rossum <guido@python.org> parents: 9286 diff changeset	641 return -1;
083efa076366 Greg Stein: Implement the new bf_getcharbuffer function, indicating Guido van Rossum <guido@python.org> parents: 9286 diff changeset	642 }
38693 72e37ada4170 Fix inconsistency in naming within an enum. Brett Cannon <bcannon@gmail.com> parents: 38676 diff changeset	643 if (!get_buf(self, &ptr, &size, CHAR_BUFFER))
31640 42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	644 return -1;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	645 pp = (const char )ptr;
42f8820686c9 Make buffer objects based on mutable objects (like array) safe. Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 31639 diff changeset	646 return size;
9305 083efa076366 Greg Stein: Implement the new bf_getcharbuffer function, indicating Guido van Rossum <guido@python.org> parents: 9286 diff changeset	647 }
083efa076366 Greg Stein: Implement the new bf_getcharbuffer function, indicating Guido van Rossum <guido@python.org> parents: 9286 diff changeset	648
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	649 static PySequenceMethods buffer_as_sequence = {
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	650 (lenfunc)buffer_length, /sq_length/
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	651 (binaryfunc)buffer_concat, /sq_concat/
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	652 (ssizeargfunc)buffer_repeat, /sq_repeat/
7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	653 (ssizeargfunc)buffer_item, /sq_item/
7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	654 (ssizessizeargfunc)buffer_slice, /sq_slice/
7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	655 (ssizeobjargproc)buffer_ass_item, /sq_ass_item/
7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	656 (ssizessizeobjargproc)buffer_ass_slice, /sq_ass_slice/
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	657 };
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	658
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	659 static PyBufferProcs buffer_as_buffer = {
36501 7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	660 (readbufferproc)buffer_getreadbuf,
7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	661 (writebufferproc)buffer_getwritebuf,
7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	662 (segcountproc)buffer_getsegcount,
7fdc639bc5b4 Merge ssize_t branch. Martin v. Löwis <martin@v.loewis.de> parents: 36082 diff changeset	663 (charbufferproc)buffer_getcharbuf,
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	664 };
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	665
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	666 PyTypeObject PyBuffer_Type = {
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	667 PyObject_HEAD_INIT(&PyType_Type)
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	668 0,
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	669 "buffer",
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	670 sizeof(PyBufferObject),
c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	671 0,
18933 09df3254b49d Merge of descr-branch back into trunk. Tim Peters <tim.peters@gmail.com> parents: 14375 diff changeset	672 (destructor)buffer_dealloc, /* tp_dealloc */
09df3254b49d Merge of descr-branch back into trunk. Tim Peters <tim.peters@gmail.com> parents: 14375 diff changeset	673 0, /* tp_print */
09df3254b49d Merge of descr-branch back into trunk. Tim Peters <tim.peters@gmail.com> parents: 14375 diff changeset	674 0, /* tp_getattr */
09df3254b49d Merge of descr-branch back into trunk. Tim Peters <tim.peters@gmail.com> parents: 14375 diff changeset	675 0, /* tp_setattr */
09df3254b49d Merge of descr-branch back into trunk. Tim Peters <tim.peters@gmail.com> parents: 14375 diff changeset	676 (cmpfunc)buffer_compare, /* tp_compare */
09df3254b49d Merge of descr-branch back into trunk. Tim Peters <tim.peters@gmail.com> parents: 14375 diff changeset	677 (reprfunc)buffer_repr, /* tp_repr */
09df3254b49d Merge of descr-branch back into trunk. Tim Peters <tim.peters@gmail.com> parents: 14375 diff changeset	678 0, /* tp_as_number */
09df3254b49d Merge of descr-branch back into trunk. Tim Peters <tim.peters@gmail.com> parents: 14375 diff changeset	679 &buffer_as_sequence, /* tp_as_sequence */
09df3254b49d Merge of descr-branch back into trunk. Tim Peters <tim.peters@gmail.com> parents: 14375 diff changeset	680 0, /* tp_as_mapping */
09df3254b49d Merge of descr-branch back into trunk. Tim Peters <tim.peters@gmail.com> parents: 14375 diff changeset	681 (hashfunc)buffer_hash, /* tp_hash */
09df3254b49d Merge of descr-branch back into trunk. Tim Peters <tim.peters@gmail.com> parents: 14375 diff changeset	682 0, /* tp_call */
09df3254b49d Merge of descr-branch back into trunk. Tim Peters <tim.peters@gmail.com> parents: 14375 diff changeset	683 (reprfunc)buffer_str, /* tp_str */
09df3254b49d Merge of descr-branch back into trunk. Tim Peters <tim.peters@gmail.com> parents: 14375 diff changeset	684 PyObject_GenericGetAttr, /* tp_getattro */
09df3254b49d Merge of descr-branch back into trunk. Tim Peters <tim.peters@gmail.com> parents: 14375 diff changeset	685 0, /* tp_setattro */
09df3254b49d Merge of descr-branch back into trunk. Tim Peters <tim.peters@gmail.com> parents: 14375 diff changeset	686 &buffer_as_buffer, /* tp_as_buffer */
38676 5bc7272b81e5 Buffer objects would return the read or write buffer for a wrapped object when Brett Cannon <bcannon@gmail.com> parents: 37589 diff changeset	687 Py_TPFLAGS_DEFAULT \| Py_TPFLAGS_HAVE_GETCHARBUFFER, /* tp_flags */
23868 8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	688 buffer_doc, /* tp_doc */
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	689 0, /* tp_traverse */
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	690 0, /* tp_clear */
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	691 0, /* tp_richcompare */
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	692 0, /* tp_weaklistoffset */
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	693 0, /* tp_iter */
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	694 0, /* tp_iternext */
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	695 0, /* tp_methods */
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	696 0, /* tp_members */
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	697 0, /* tp_getset */
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	698 0, /* tp_base */
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	699 0, /* tp_dict */
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	700 0, /* tp_descr_get */
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	701 0, /* tp_descr_set */
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	702 0, /* tp_dictoffset */
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	703 0, /* tp_init */
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	704 0, /* tp_alloc */
8e6760bf1884 SF patch 568629 by Oren Tirosh: types made callable. Guido van Rossum <guido@python.org> parents: 22651 diff changeset	705 buffer_new, /* tp_new */
9278 c39218a68df1 Add Greg Stein's buffer object API. Guido van Rossum <guido@python.org> parents: diff changeset	706 };

Mercurial > cpython-lru_cache-weakref

annotate Objects/bufferobject.c @ 39496:352ffe77b71d legacy-trunk