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		af68c874a6
		
	
	
	
	
		
			
			In C++, it's an error to pass a string literal to a char* function without a const_cast(). Rather than require every C++ extension module to put a cast around string literals, fix the API to state the const-ness. I focused on parts of the API where people usually pass literals: PyArg_ParseTuple() and friends, Py_BuildValue(), PyMethodDef, the type slots, etc. Predictably, there were a large set of functions that needed to be fixed as a result of these changes. The most pervasive change was to make the keyword args list passed to PyArg_ParseTupleAndKewords() to be a const char *kwlist[]. One cast was required as a result of the changes: A type object mallocs the memory for its tp_doc slot and later frees it. PyTypeObject says that tp_doc is const char *; but if the type was created by type_new(), we know it is safe to cast to char *.
		
			
				
	
	
		
			738 lines
		
	
	
	
		
			19 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			738 lines
		
	
	
	
		
			19 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
| 
 | |
| #include "Python.h"
 | |
| #include "import.h"
 | |
| #include "cStringIO.h"
 | |
| #include "structmember.h"
 | |
| 
 | |
| PyDoc_STRVAR(cStringIO_module_documentation,
 | |
| "A simple fast partial StringIO replacement.\n"
 | |
| "\n"
 | |
| "This module provides a simple useful replacement for\n"
 | |
| "the StringIO module that is written in C.  It does not provide the\n"
 | |
| "full generality of StringIO, but it provides enough for most\n"
 | |
| "applications and is especially useful in conjunction with the\n"
 | |
| "pickle module.\n"
 | |
| "\n"
 | |
| "Usage:\n"
 | |
| "\n"
 | |
| "  from cStringIO import StringIO\n"
 | |
| "\n"
 | |
| "  an_output_stream=StringIO()\n"
 | |
| "  an_output_stream.write(some_stuff)\n"
 | |
| "  ...\n"
 | |
| "  value=an_output_stream.getvalue()\n"
 | |
| "\n"
 | |
| "  an_input_stream=StringIO(a_string)\n"
 | |
| "  spam=an_input_stream.readline()\n"
 | |
| "  spam=an_input_stream.read(5)\n"
 | |
| "  an_input_stream.seek(0)           # OK, start over\n"
 | |
| "  spam=an_input_stream.read()       # and read it all\n"
 | |
| "  \n"
 | |
| "If someone else wants to provide a more complete implementation,\n"
 | |
| "go for it. :-)  \n"
 | |
| "\n"
 | |
| "cStringIO.c,v 1.29 1999/06/15 14:10:27 jim Exp\n");
 | |
| 
 | |
| #define UNLESS(E) if (!(E))
 | |
| 
 | |
| 
 | |
| /* Declaration for file-like objects that manage data as strings 
 | |
| 
 | |
|    The IOobject type should be though of as a common base type for
 | |
|    Iobjects, which provide input (read-only) StringIO objects and
 | |
|    Oobjects, which provide read-write objects.  Most of the methods
 | |
|    depend only on common data.
 | |
| */
 | |
| 
 | |
| typedef struct {
 | |
|   PyObject_HEAD
 | |
|   char *buf;
 | |
|   int pos, string_size;
 | |
| } IOobject;
 | |
| 
 | |
| #define IOOOBJECT(O) ((IOobject*)(O))
 | |
| 
 | |
| /* Declarations for objects of type StringO */
 | |
| 
 | |
| typedef struct { /* Subtype of IOobject */
 | |
|   PyObject_HEAD
 | |
|   char *buf;
 | |
|   int pos, string_size;
 | |
| 
 | |
|   int buf_size, softspace;
 | |
| } Oobject;
 | |
| 
 | |
| /* Declarations for objects of type StringI */
 | |
| 
 | |
| typedef struct { /* Subtype of IOobject */
 | |
|   PyObject_HEAD
 | |
|   char *buf;
 | |
|   int pos, string_size;
 | |
|   /* We store a reference to the object here in order to keep
 | |
|      the buffer alive during the lifetime of the Iobject. */
 | |
|   PyObject *pbuf;
 | |
| } Iobject;
 | |
| 
 | |
| /* IOobject (common) methods */
 | |
| 
 | |
| PyDoc_STRVAR(IO_flush__doc__, "flush(): does nothing.");
 | |
| 
 | |
| static int
 | |
| IO__opencheck(IOobject *self) {
 | |
|         UNLESS (self->buf) {
 | |
|                 PyErr_SetString(PyExc_ValueError,
 | |
|                                 "I/O operation on closed file");
 | |
|                 return 0;
 | |
|         }
 | |
|         return 1;
 | |
| }
 | |
| 
 | |
| static PyObject *
 | |
| IO_get_closed(IOobject *self, void *closure)
 | |
| {
 | |
| 	PyObject *result = Py_False;
 | |
| 
 | |
| 	if (self->buf == NULL)
 | |
| 		result = Py_True;
 | |
| 	Py_INCREF(result);
 | |
| 	return result;
 | |
| }
 | |
| 
 | |
| static PyGetSetDef file_getsetlist[] = {
 | |
| 	{"closed", (getter)IO_get_closed, NULL, "True if the file is closed"},
 | |
| 	{0},
 | |
| };
 | |
| 
 | |
| static PyObject *
 | |
| IO_flush(IOobject *self, PyObject *unused) {
 | |
| 
 | |
|         UNLESS (IO__opencheck(self)) return NULL;
 | |
| 
 | |
|         Py_INCREF(Py_None);
 | |
|         return Py_None;
 | |
| }
 | |
| 
 | |
| PyDoc_STRVAR(IO_getval__doc__,
 | |
| "getvalue([use_pos]) -- Get the string value."
 | |
| "\n"
 | |
| "If use_pos is specified and is a true value, then the string returned\n"
 | |
| "will include only the text up to the current file position.\n");
 | |
| 
 | |
| static PyObject *
 | |
| IO_cgetval(PyObject *self) {
 | |
|         UNLESS (IO__opencheck(IOOOBJECT(self))) return NULL;
 | |
|         return PyString_FromStringAndSize(((IOobject*)self)->buf,
 | |
|                                           ((IOobject*)self)->pos);
 | |
| }
 | |
| 
 | |
| static PyObject *
 | |
| IO_getval(IOobject *self, PyObject *args) {
 | |
|         PyObject *use_pos=Py_None;
 | |
|         int s;
 | |
| 
 | |
|         UNLESS (IO__opencheck(self)) return NULL;
 | |
|         UNLESS (PyArg_UnpackTuple(args,"getval", 0, 1,&use_pos)) return NULL;
 | |
| 
 | |
|         if (PyObject_IsTrue(use_pos)) {
 | |
|                   s=self->pos;
 | |
|                   if (s > self->string_size) s=self->string_size;
 | |
|         }
 | |
|         else
 | |
|                   s=self->string_size;
 | |
|         return PyString_FromStringAndSize(self->buf, s);
 | |
| }
 | |
| 
 | |
| PyDoc_STRVAR(IO_isatty__doc__, "isatty(): always returns 0");
 | |
| 
 | |
| static PyObject *
 | |
| IO_isatty(IOobject *self, PyObject *unused) {
 | |
| 	Py_INCREF(Py_False);
 | |
|         return Py_False;
 | |
| }
 | |
| 
 | |
| PyDoc_STRVAR(IO_read__doc__,
 | |
| "read([s]) -- Read s characters, or the rest of the string");
 | |
| 
 | |
| static int
 | |
| IO_cread(PyObject *self, char **output, int  n) {
 | |
|         int l;
 | |
| 
 | |
|         UNLESS (IO__opencheck(IOOOBJECT(self))) return -1;
 | |
|         l = ((IOobject*)self)->string_size - ((IOobject*)self)->pos;  
 | |
|         if (n < 0 || n > l) {
 | |
|                 n = l;
 | |
|                 if (n < 0) n=0;
 | |
|         }
 | |
| 
 | |
|         *output=((IOobject*)self)->buf + ((IOobject*)self)->pos;
 | |
|         ((IOobject*)self)->pos += n;
 | |
|         return n;
 | |
| }
 | |
| 
 | |
| static PyObject *
 | |
| IO_read(IOobject *self, PyObject *args) {
 | |
|         int n = -1;
 | |
|         char *output;
 | |
| 
 | |
|         UNLESS (PyArg_ParseTuple(args, "|i:read", &n)) return NULL;
 | |
| 
 | |
|         if ( (n=IO_cread((PyObject*)self,&output,n)) < 0) return NULL;
 | |
| 
 | |
|         return PyString_FromStringAndSize(output, n);
 | |
| }
 | |
| 
 | |
| PyDoc_STRVAR(IO_readline__doc__, "readline() -- Read one line");
 | |
| 
 | |
| static int
 | |
| IO_creadline(PyObject *self, char **output) {
 | |
|         char *n, *s;
 | |
|         int l;
 | |
| 
 | |
|         UNLESS (IO__opencheck(IOOOBJECT(self))) return -1;
 | |
| 
 | |
|         for (n = ((IOobject*)self)->buf + ((IOobject*)self)->pos,
 | |
|                s = ((IOobject*)self)->buf + ((IOobject*)self)->string_size; 
 | |
|              n < s && *n != '\n'; n++);
 | |
|         if (n < s) n++;
 | |
| 
 | |
|         *output=((IOobject*)self)->buf + ((IOobject*)self)->pos;
 | |
|         l = n - ((IOobject*)self)->buf - ((IOobject*)self)->pos;
 | |
|         ((IOobject*)self)->pos += l;
 | |
|         return l;
 | |
| }
 | |
| 
 | |
| static PyObject *
 | |
| IO_readline(IOobject *self, PyObject *args) {
 | |
|         int n, m=-1;
 | |
|         char *output;
 | |
| 
 | |
|         if (args)
 | |
|                 UNLESS (PyArg_ParseTuple(args, "|i:readline", &m)) return NULL;
 | |
| 
 | |
|         if( (n=IO_creadline((PyObject*)self,&output)) < 0) return NULL;
 | |
|         if (m >= 0 && m < n) {
 | |
|                 m = n - m;
 | |
|                 n -= m;
 | |
|                 self->pos -= m;
 | |
|         }
 | |
|         return PyString_FromStringAndSize(output, n);
 | |
| }
 | |
| 
 | |
| PyDoc_STRVAR(IO_readlines__doc__, "readlines() -- Read all lines");
 | |
| 
 | |
| static PyObject *
 | |
| IO_readlines(IOobject *self, PyObject *args) {
 | |
| 	int n;
 | |
| 	char *output;
 | |
| 	PyObject *result, *line;
 | |
|         int hint = 0, length = 0;
 | |
| 	
 | |
|         UNLESS (PyArg_ParseTuple(args, "|i:readlines", &hint)) return NULL;
 | |
| 
 | |
| 	result = PyList_New(0);
 | |
| 	if (!result)
 | |
| 		return NULL;
 | |
| 
 | |
| 	while (1){
 | |
| 		if ( (n = IO_creadline((PyObject*)self,&output)) < 0)
 | |
|                         goto err;
 | |
| 		if (n == 0)
 | |
| 			break;
 | |
| 		line = PyString_FromStringAndSize (output, n);
 | |
| 		if (!line) 
 | |
|                         goto err;
 | |
| 		if (PyList_Append (result, line) == -1) {
 | |
| 			Py_DECREF (line);
 | |
| 			goto err;
 | |
| 		}
 | |
| 		Py_DECREF (line);
 | |
|                 length += n;
 | |
|                 if (hint > 0 && length >= hint)
 | |
| 			break;
 | |
| 	}
 | |
| 	return result;
 | |
|  err:
 | |
|         Py_DECREF(result);
 | |
|         return NULL;
 | |
| }
 | |
| 
 | |
| PyDoc_STRVAR(IO_reset__doc__,
 | |
| "reset() -- Reset the file position to the beginning");
 | |
| 
 | |
| static PyObject *
 | |
| IO_reset(IOobject *self, PyObject *unused) {
 | |
| 
 | |
|         UNLESS (IO__opencheck(self)) return NULL;
 | |
| 
 | |
|         self->pos = 0;
 | |
| 
 | |
|         Py_INCREF(Py_None);
 | |
|         return Py_None;
 | |
| }
 | |
| 
 | |
| PyDoc_STRVAR(IO_tell__doc__, "tell() -- get the current position.");
 | |
| 
 | |
| static PyObject *
 | |
| IO_tell(IOobject *self, PyObject *unused) {
 | |
| 
 | |
|         UNLESS (IO__opencheck(self)) return NULL;
 | |
| 
 | |
|         return PyInt_FromLong(self->pos);
 | |
| }
 | |
| 
 | |
| PyDoc_STRVAR(IO_truncate__doc__,
 | |
| "truncate(): truncate the file at the current position.");
 | |
| 
 | |
| static PyObject *
 | |
| IO_truncate(IOobject *self, PyObject *args) {
 | |
|         int pos = -1;
 | |
| 	
 | |
|         UNLESS (IO__opencheck(self)) return NULL;
 | |
|         UNLESS (PyArg_ParseTuple(args, "|i:truncate", &pos)) return NULL;
 | |
|         if (pos < 0) pos = self->pos;
 | |
| 
 | |
|         if (self->string_size > pos) self->string_size = pos;
 | |
|         self->pos = self->string_size;
 | |
| 
 | |
|         Py_INCREF(Py_None);
 | |
|         return Py_None;
 | |
| }
 | |
| 
 | |
| static PyObject *
 | |
| IO_iternext(Iobject *self)
 | |
| {
 | |
| 	PyObject *next;
 | |
| 	next = IO_readline((IOobject *)self, NULL);
 | |
| 	if (!next)
 | |
| 		return NULL;
 | |
| 	if (!PyString_GET_SIZE(next)) {
 | |
| 		Py_DECREF(next);
 | |
| 		PyErr_SetNone(PyExc_StopIteration);
 | |
| 		return NULL;
 | |
| 	}
 | |
| 	return next;
 | |
| }
 | |
| 
 | |
| 
 | |
| 
 | |
| 
 | |
| /* Read-write object methods */
 | |
| 
 | |
| PyDoc_STRVAR(O_seek__doc__,
 | |
| "seek(position)       -- set the current position\n"
 | |
| "seek(position, mode) -- mode 0: absolute; 1: relative; 2: relative to EOF");
 | |
| 
 | |
| static PyObject *
 | |
| O_seek(Oobject *self, PyObject *args) {
 | |
|         int position, mode = 0;
 | |
| 
 | |
|         UNLESS (IO__opencheck(IOOOBJECT(self))) return NULL;
 | |
|         UNLESS (PyArg_ParseTuple(args, "i|i:seek", &position, &mode)) 
 | |
|                 return NULL;
 | |
| 
 | |
|         if (mode == 2) {
 | |
|                 position += self->string_size;
 | |
|         }
 | |
|         else if (mode == 1) {
 | |
|                 position += self->pos;
 | |
|         }
 | |
| 
 | |
|         if (position > self->buf_size) {
 | |
|                   self->buf_size*=2;
 | |
|                   if (self->buf_size <= position) self->buf_size=position+1;
 | |
|                   UNLESS (self->buf = (char*)
 | |
|                           realloc(self->buf,self->buf_size)) {
 | |
|                       self->buf_size=self->pos=0;
 | |
|                       return PyErr_NoMemory();
 | |
|                     }
 | |
|           }
 | |
|         else if (position < 0) position=0;
 | |
| 
 | |
|         self->pos=position;
 | |
| 
 | |
|         while (--position >= self->string_size) self->buf[position]=0;
 | |
| 
 | |
|         Py_INCREF(Py_None);
 | |
|         return Py_None;
 | |
| }
 | |
| 
 | |
| PyDoc_STRVAR(O_write__doc__,
 | |
| "write(s) -- Write a string to the file"
 | |
| "\n\nNote (hack:) writing None resets the buffer");
 | |
| 
 | |
| 
 | |
| static int
 | |
| O_cwrite(PyObject *self, const char *c, int  l) {
 | |
|         int newl;
 | |
|         Oobject *oself;
 | |
| 
 | |
|         UNLESS (IO__opencheck(IOOOBJECT(self))) return -1;
 | |
|         oself = (Oobject *)self;
 | |
| 
 | |
|         newl = oself->pos+l;
 | |
|         if (newl >= oself->buf_size) {
 | |
|             oself->buf_size *= 2;
 | |
|             if (oself->buf_size <= newl) 
 | |
|                     oself->buf_size = newl+1;
 | |
|             UNLESS (oself->buf = 
 | |
|                     (char*)realloc(oself->buf, oself->buf_size)) {
 | |
|                     PyErr_SetString(PyExc_MemoryError,"out of memory");
 | |
|                     oself->buf_size = oself->pos = 0;
 | |
|                     return -1;
 | |
|               }
 | |
|           }
 | |
| 
 | |
|         memcpy(oself->buf+oself->pos,c,l);
 | |
| 
 | |
|         oself->pos += l;
 | |
| 
 | |
|         if (oself->string_size < oself->pos) {
 | |
|             oself->string_size = oself->pos;
 | |
|         }
 | |
| 
 | |
|         return l;
 | |
| }
 | |
| 
 | |
| static PyObject *
 | |
| O_write(Oobject *self, PyObject *args) {
 | |
|         char *c;
 | |
|         int l;
 | |
| 
 | |
|         UNLESS (PyArg_ParseTuple(args, "t#:write", &c, &l)) return NULL;
 | |
| 
 | |
|         if (O_cwrite((PyObject*)self,c,l) < 0) return NULL;
 | |
| 
 | |
|         Py_INCREF(Py_None);
 | |
|         return Py_None;
 | |
| }
 | |
| 
 | |
| PyDoc_STRVAR(O_close__doc__, "close(): explicitly release resources held.");
 | |
| 
 | |
| static PyObject *
 | |
| O_close(Oobject *self, PyObject *unused) {
 | |
|         if (self->buf != NULL) free(self->buf);
 | |
|         self->buf = NULL;
 | |
| 
 | |
|         self->pos = self->string_size = self->buf_size = 0;
 | |
| 
 | |
|         Py_INCREF(Py_None);
 | |
|         return Py_None;
 | |
| }
 | |
| 
 | |
| PyDoc_STRVAR(O_writelines__doc__,
 | |
| "writelines(sequence_of_strings) -> None.  Write the strings to the file.\n"
 | |
| "\n"
 | |
| "Note that newlines are not added.  The sequence can be any iterable object\n"
 | |
| "producing strings. This is equivalent to calling write() for each string.");
 | |
| static PyObject *
 | |
| O_writelines(Oobject *self, PyObject *args) {
 | |
| 	PyObject *it, *s;
 | |
| 	
 | |
| 	it = PyObject_GetIter(args);
 | |
| 	if (it == NULL)
 | |
| 		return NULL;
 | |
| 	while ((s = PyIter_Next(it)) != NULL) {
 | |
| 		int n;
 | |
| 		char *c;
 | |
| 		if (PyString_AsStringAndSize(s, &c, &n) == -1) {
 | |
| 			Py_DECREF(it);
 | |
| 			Py_DECREF(s);
 | |
| 			return NULL;
 | |
| 		}
 | |
| 		if (O_cwrite((PyObject *)self, c, n) == -1) {
 | |
| 			Py_DECREF(it);
 | |
| 			Py_DECREF(s);
 | |
| 			return NULL;
 | |
|                }
 | |
|                Py_DECREF(s);
 | |
|        }
 | |
| 
 | |
|        Py_DECREF(it);
 | |
| 
 | |
|        /* See if PyIter_Next failed */
 | |
|        if (PyErr_Occurred())
 | |
|                return NULL;
 | |
| 
 | |
|        Py_RETURN_NONE;
 | |
| }
 | |
| static struct PyMethodDef O_methods[] = {
 | |
|   /* Common methods: */
 | |
|   {"flush",     (PyCFunction)IO_flush,    METH_NOARGS,  IO_flush__doc__},
 | |
|   {"getvalue",  (PyCFunction)IO_getval,   METH_VARARGS, IO_getval__doc__},
 | |
|   {"isatty",    (PyCFunction)IO_isatty,   METH_NOARGS,  IO_isatty__doc__},
 | |
|   {"read",	(PyCFunction)IO_read,     METH_VARARGS, IO_read__doc__},
 | |
|   {"readline",	(PyCFunction)IO_readline, METH_VARARGS, IO_readline__doc__},
 | |
|   {"readlines",	(PyCFunction)IO_readlines,METH_VARARGS, IO_readlines__doc__},
 | |
|   {"reset",	(PyCFunction)IO_reset,	  METH_NOARGS,  IO_reset__doc__},
 | |
|   {"tell",      (PyCFunction)IO_tell,     METH_NOARGS,  IO_tell__doc__},
 | |
|   {"truncate",  (PyCFunction)IO_truncate, METH_VARARGS, IO_truncate__doc__},
 | |
| 
 | |
|   /* Read-write StringIO specific  methods: */
 | |
|   {"close",      (PyCFunction)O_close,      METH_NOARGS,  O_close__doc__},
 | |
|   {"seek",       (PyCFunction)O_seek,       METH_VARARGS, O_seek__doc__},
 | |
|   {"write",	 (PyCFunction)O_write,      METH_VARARGS, O_write__doc__},
 | |
|   {"writelines", (PyCFunction)O_writelines, METH_O,	  O_writelines__doc__},
 | |
|   {NULL,	 NULL}		/* sentinel */
 | |
| };
 | |
| 
 | |
| static PyMemberDef O_memberlist[] = {
 | |
| 	{"softspace",	T_INT,	offsetof(Oobject, softspace),	0,
 | |
| 	 "flag indicating that a space needs to be printed; used by print"},
 | |
| 	 /* getattr(f, "closed") is implemented without this table */
 | |
| 	{NULL} /* Sentinel */
 | |
| };
 | |
| 
 | |
| static void
 | |
| O_dealloc(Oobject *self) {
 | |
|         if (self->buf != NULL)
 | |
|                 free(self->buf);
 | |
|         PyObject_Del(self);
 | |
| }
 | |
| 
 | |
| PyDoc_STRVAR(Otype__doc__, "Simple type for output to strings.");
 | |
| 
 | |
| static PyTypeObject Otype = {
 | |
|   PyObject_HEAD_INIT(NULL)
 | |
|   0,	       			/*ob_size*/
 | |
|   "cStringIO.StringO",   	/*tp_name*/
 | |
|   sizeof(Oobject),       	/*tp_basicsize*/
 | |
|   0,	       			/*tp_itemsize*/
 | |
|   /* methods */
 | |
|   (destructor)O_dealloc,	/*tp_dealloc*/
 | |
|   (printfunc)0,			/*tp_print*/
 | |
|   0,		 		/*tp_getattr */
 | |
|   0,		 		/*tp_setattr */
 | |
|   (cmpfunc)0,			/*tp_compare*/
 | |
|   (reprfunc)0,			/*tp_repr*/
 | |
|   0,				/*tp_as_number*/
 | |
|   0,				/*tp_as_sequence*/
 | |
|   0,				/*tp_as_mapping*/
 | |
|   (hashfunc)0,			/*tp_hash*/
 | |
|   (ternaryfunc)0,		/*tp_call*/
 | |
|   (reprfunc)0,			/*tp_str*/
 | |
|   0,				/*tp_getattro */
 | |
|   0,				/*tp_setattro */
 | |
|   0,				/*tp_as_buffer */
 | |
|   Py_TPFLAGS_DEFAULT,		/*tp_flags*/
 | |
|   Otype__doc__, 		/*tp_doc */
 | |
|   0,				/*tp_traverse */
 | |
|   0,				/*tp_clear */
 | |
|   0,				/*tp_richcompare */
 | |
|   0,				/*tp_weaklistoffset */
 | |
|   PyObject_SelfIter,		/*tp_iter */
 | |
|   (iternextfunc)IO_iternext,	/*tp_iternext */
 | |
|   O_methods,			/*tp_methods */
 | |
|   O_memberlist,			/*tp_members */
 | |
|   file_getsetlist,		/*tp_getset */
 | |
| };
 | |
| 
 | |
| static PyObject *
 | |
| newOobject(int  size) {
 | |
|         Oobject *self;
 | |
| 
 | |
|         self = PyObject_New(Oobject, &Otype);
 | |
|         if (self == NULL)
 | |
|                 return NULL;
 | |
|         self->pos=0;
 | |
|         self->string_size = 0;
 | |
|         self->softspace = 0;
 | |
| 
 | |
|         UNLESS (self->buf = (char *)malloc(size)) {
 | |
|                   PyErr_SetString(PyExc_MemoryError,"out of memory");
 | |
|                   self->buf_size = 0;
 | |
|                   return NULL;
 | |
|           }
 | |
| 
 | |
|         self->buf_size=size;
 | |
|         return (PyObject*)self;
 | |
| }
 | |
| 
 | |
| /* End of code for StringO objects */
 | |
| /* -------------------------------------------------------- */
 | |
| 
 | |
| static PyObject *
 | |
| I_close(Iobject *self, PyObject *unused) {
 | |
|         Py_XDECREF(self->pbuf);
 | |
|         self->pbuf = NULL;
 | |
|         self->buf = NULL;
 | |
| 
 | |
|         self->pos = self->string_size = 0;
 | |
| 
 | |
|         Py_INCREF(Py_None);
 | |
|         return Py_None;
 | |
| }
 | |
| 
 | |
| static PyObject *
 | |
| I_seek(Iobject *self, PyObject *args) {
 | |
|         int position, mode = 0;
 | |
| 
 | |
|         UNLESS (IO__opencheck(IOOOBJECT(self))) return NULL;
 | |
|         UNLESS (PyArg_ParseTuple(args, "i|i:seek", &position, &mode)) 
 | |
|                 return NULL;
 | |
| 
 | |
|         if (mode == 2) position += self->string_size;
 | |
|         else if (mode == 1) position += self->pos;
 | |
| 
 | |
|         if (position < 0) position=0;
 | |
| 
 | |
|         self->pos=position;
 | |
| 
 | |
|         Py_INCREF(Py_None);
 | |
|         return Py_None;
 | |
| }
 | |
| 
 | |
| static struct PyMethodDef I_methods[] = {
 | |
|   /* Common methods: */
 | |
|   {"flush",     (PyCFunction)IO_flush,    METH_NOARGS,  IO_flush__doc__},
 | |
|   {"getvalue",  (PyCFunction)IO_getval,   METH_VARARGS, IO_getval__doc__},
 | |
|   {"isatty",    (PyCFunction)IO_isatty,   METH_NOARGS,  IO_isatty__doc__},
 | |
|   {"read",	(PyCFunction)IO_read,     METH_VARARGS, IO_read__doc__},
 | |
|   {"readline",	(PyCFunction)IO_readline, METH_VARARGS, IO_readline__doc__},
 | |
|   {"readlines",	(PyCFunction)IO_readlines,METH_VARARGS, IO_readlines__doc__},
 | |
|   {"reset",	(PyCFunction)IO_reset,	  METH_NOARGS,  IO_reset__doc__},
 | |
|   {"tell",      (PyCFunction)IO_tell,     METH_NOARGS,  IO_tell__doc__},
 | |
|   {"truncate",  (PyCFunction)IO_truncate, METH_VARARGS, IO_truncate__doc__},
 | |
| 
 | |
|   /* Read-only StringIO specific  methods: */
 | |
|   {"close",     (PyCFunction)I_close,    METH_NOARGS,  O_close__doc__},
 | |
|   {"seek",      (PyCFunction)I_seek,     METH_VARARGS, O_seek__doc__},  
 | |
|   {NULL,	NULL}
 | |
| };
 | |
| 
 | |
| static void
 | |
| I_dealloc(Iobject *self) {
 | |
|   Py_XDECREF(self->pbuf);
 | |
|   PyObject_Del(self);
 | |
| }
 | |
| 
 | |
| 
 | |
| PyDoc_STRVAR(Itype__doc__,
 | |
| "Simple type for treating strings as input file streams");
 | |
| 
 | |
| static PyTypeObject Itype = {
 | |
|   PyObject_HEAD_INIT(NULL)
 | |
|   0,					/*ob_size*/
 | |
|   "cStringIO.StringI",			/*tp_name*/
 | |
|   sizeof(Iobject),			/*tp_basicsize*/
 | |
|   0,					/*tp_itemsize*/
 | |
|   /* methods */
 | |
|   (destructor)I_dealloc,		/*tp_dealloc*/
 | |
|   (printfunc)0,				/*tp_print*/
 | |
|   0,		 			/* tp_getattr */
 | |
|   (setattrfunc)0,			/*tp_setattr*/
 | |
|   (cmpfunc)0,				/*tp_compare*/
 | |
|   (reprfunc)0,				/*tp_repr*/
 | |
|   0,					/*tp_as_number*/
 | |
|   0,					/*tp_as_sequence*/
 | |
|   0,					/*tp_as_mapping*/
 | |
|   (hashfunc)0,				/*tp_hash*/
 | |
|   (ternaryfunc)0,			/*tp_call*/
 | |
|   (reprfunc)0,				/*tp_str*/
 | |
|   0,					/* tp_getattro */
 | |
|   0,					/* tp_setattro */
 | |
|   0,					/* tp_as_buffer */
 | |
|   Py_TPFLAGS_DEFAULT,			/* tp_flags */
 | |
|   Itype__doc__,				/* tp_doc */
 | |
|   0,					/* tp_traverse */
 | |
|   0,					/* tp_clear */
 | |
|   0,					/* tp_richcompare */
 | |
|   0,					/* tp_weaklistoffset */
 | |
|   PyObject_SelfIter,			/* tp_iter */
 | |
|   (iternextfunc)IO_iternext,		/* tp_iternext */
 | |
|   I_methods,				/* tp_methods */
 | |
|   0,					/* tp_members */
 | |
|   file_getsetlist,			/* tp_getset */
 | |
| };
 | |
| 
 | |
| static PyObject *
 | |
| newIobject(PyObject *s) {
 | |
|   Iobject *self;
 | |
|   char *buf;
 | |
|   int size;
 | |
| 
 | |
|   if (PyObject_AsReadBuffer(s, (const void **)&buf, &size)) {
 | |
|       PyErr_Format(PyExc_TypeError, "expected read buffer, %.200s found",
 | |
| 		   s->ob_type->tp_name);
 | |
|       return NULL;
 | |
|   }
 | |
|   UNLESS (self = PyObject_New(Iobject, &Itype)) return NULL;
 | |
|   Py_INCREF(s);
 | |
|   self->buf=buf;
 | |
|   self->string_size=size;
 | |
|   self->pbuf=s;
 | |
|   self->pos=0;
 | |
|   
 | |
|   return (PyObject*)self;
 | |
| }
 | |
| 
 | |
| /* End of code for StringI objects */
 | |
| /* -------------------------------------------------------- */
 | |
| 
 | |
| 
 | |
| PyDoc_STRVAR(IO_StringIO__doc__,
 | |
| "StringIO([s]) -- Return a StringIO-like stream for reading or writing");
 | |
| 
 | |
| static PyObject *
 | |
| IO_StringIO(PyObject *self, PyObject *args) {
 | |
|   PyObject *s=0;
 | |
| 
 | |
|   if (!PyArg_UnpackTuple(args, "StringIO", 0, 1, &s)) return NULL;
 | |
| 
 | |
|   if (s) return newIobject(s);
 | |
|   return newOobject(128);
 | |
| }
 | |
| 
 | |
| /* List of methods defined in the module */
 | |
| 
 | |
| static struct PyMethodDef IO_methods[] = {
 | |
|   {"StringIO",	(PyCFunction)IO_StringIO,	
 | |
|    METH_VARARGS,	IO_StringIO__doc__},
 | |
|   {NULL,		NULL}		/* sentinel */
 | |
| };
 | |
| 
 | |
| 
 | |
| /* Initialization function for the module (*must* be called initcStringIO) */
 | |
| 
 | |
| static struct PycStringIO_CAPI CAPI = {
 | |
|   IO_cread,
 | |
|   IO_creadline,
 | |
|   O_cwrite,
 | |
|   IO_cgetval,
 | |
|   newOobject,
 | |
|   newIobject,
 | |
|   &Itype,
 | |
|   &Otype,
 | |
| };
 | |
| 
 | |
| #ifndef PyMODINIT_FUNC	/* declarations for DLL import/export */
 | |
| #define PyMODINIT_FUNC void
 | |
| #endif
 | |
| PyMODINIT_FUNC
 | |
| initcStringIO(void) {
 | |
|   PyObject *m, *d, *v;
 | |
| 
 | |
| 
 | |
|   /* Create the module and add the functions */
 | |
|   m = Py_InitModule4("cStringIO", IO_methods,
 | |
| 		     cStringIO_module_documentation,
 | |
| 		     (PyObject*)NULL,PYTHON_API_VERSION);
 | |
| 
 | |
|   /* Add some symbolic constants to the module */
 | |
|   d = PyModule_GetDict(m);
 | |
|   
 | |
|   /* Export C API */
 | |
|   Itype.ob_type=&PyType_Type;
 | |
|   Otype.ob_type=&PyType_Type;
 | |
|   if (PyType_Ready(&Otype) < 0) return;
 | |
|   if (PyType_Ready(&Itype) < 0) return;
 | |
|   PyDict_SetItemString(d,"cStringIO_CAPI",
 | |
| 		       v = PyCObject_FromVoidPtr(&CAPI,NULL));
 | |
|   Py_XDECREF(v);
 | |
| 
 | |
|   /* Export Types */
 | |
|   PyDict_SetItemString(d,"InputType",  (PyObject*)&Itype);
 | |
|   PyDict_SetItemString(d,"OutputType", (PyObject*)&Otype);
 | |
| 
 | |
|   /* Maybe make certain warnings go away */
 | |
|   if (0) PycString_IMPORT;
 | |
| }
 |