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Major fixes to pointer libraries

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git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@807 626c5289-ae23-0410-ae9c-e8d60b6d4f22
This commit is contained in:
Dave Beazley 2000-09-02 19:25:15 +00:00
commit 58ecd2560f
5 changed files with 107 additions and 738 deletions
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155
Lib/python/ptrlang.i
View file

@ -33,68 +33,6 @@ static swig_type_info *SWIG_POINTER_char_pp = 0;
%{
/*------------------------------------------------------------------
ptrcast(value,type)
Constructs a new pointer value. Value may either be a string
or an integer. Type is a string corresponding to either the
C datatype or mangled datatype.
ptrcast(0,"Vector *")
or
ptrcast(0,"Vector_p")
------------------------------------------------------------------ */
static PyObject *ptrcast(PyObject *_PTRVALUE, char *type) {
char *r,*s;
void *ptr;
PyObject *obj;
char *typestr,*c;
swig_type_info temptype;
/* Produce a "mangled" version of the type string. */
typestr = (char *) malloc(strlen(type)+2);
/* Go through and munge the typestring */
r = typestr;
*(r++) = '_';
c = type;
while (*c) {
if (!isspace(*c)) {
if ((*c == '*') || (*c == '&')) {
*(r++) = 'p';
}
else *(r++) = *c;
} else {
*(r++) = '_';
}
c++;
}
*(r++) = 0;
/* Check to see what kind of object _PTRVALUE is */
if (PyInt_Check(_PTRVALUE)) {
ptr = (void *) PyInt_AsLong(_PTRVALUE);
/* Received a numerical value. Make a pointer out of it */
temptype.name = typestr;
obj = SWIG_NewPointerObj(ptr,&temptype);
obj = PyString_FromString(r);
} else {
/* Now extract the pointer value */
if (!SWIG_ConvertPtr(_PTRVALUE,&ptr,0,0)) {
temptype.name=typestr;
obj = SWIG_NewPointerObj(ptr,&temptype);
} else {
obj = NULL;
}
}
if (!obj)
PyErr_SetString(PyExc_TypeError,"Type error in ptrcast. Argument is not a valid pointer value.");
return obj;
}
/*------------------------------------------------------------------
ptrvalue(ptr,type = 0)
@ -398,61 +336,6 @@ static PyObject *ptradd(PyObject *_PTRVALUE, int offset) {
return obj;
}
/*------------------------------------------------------------------
ptrmap(type1,type2)
Allows a mapping between type1 and type2. (Like a typedef)
------------------------------------------------------------------ */
static void ptrmap(char *type1, char *type2) {
char *typestr1,*typestr2,*c,*r;
/* Produce a "mangled" version of the type string. */
typestr1 = (char *) malloc(strlen(type1)+2);
/* Go through and munge the typestring */
r = typestr1;
*(r++) = '_';
c = type1;
while (*c) {
if (!isspace(*c)) {
if ((*c == '*') || (*c == '&')) {
*(r++) = 'p';
}
else *(r++) = *c;
} else {
*(r++) = '_';
}
c++;
}
*(r++) = 0;
typestr2 = (char *) malloc(strlen(type2)+2);
/* Go through and munge the typestring */
r = typestr2;
*(r++) = '_';
c = type2;
while (*c) {
if (!isspace(*c)) {
if ((*c == '*') || (*c == '&')) {
*(r++) = 'p';
}
else *(r++) = *c;
} else {
*(r++) = '_';
}
c++;
}
*(r++) = 0;
/* Currently unsupported */
/*
SWIG_RegisterMapping(typestr1,typestr2,0);
SWIG_RegisterMapping(typestr2,typestr1,0);
*/
}
/*------------------------------------------------------------------
ptrfree(ptr)
@ -504,27 +387,6 @@ PyObject *ptrfree(PyObject *_PTRVALUE) {
if ($source == -1) return NULL;
}
PyObject *ptrcast(PyObject *ptr, char *type);
// Casts a pointer ptr to a new datatype given by the string type.
// type may be either the SWIG generated representation of a datatype
// or the C representation. For example :
//
// ptrcast(ptr,"double_p"); # Python representation
// ptrcast(ptr,"double *"); # C representation
//
// A new pointer value is returned. ptr may also be an integer
// value in which case the value will be used to set the pointer
// value. For example :
//
// a = ptrcast(0,"Vector_p");
//
// Will create a NULL pointer of type "Vector_p"
//
// The casting operation is sensitive to formatting. As a result,
// "double *" is different than "double*". As a result of thumb,
// there should always be exactly one space between the C datatype
// and any pointer specifiers (*).
PyObject *ptrvalue(PyObject *ptr, int index = 0, char *type = 0);
// Returns the value that a pointer is pointing to (ie. dereferencing).
// The type is automatically inferred by the pointer type--thus, an
@ -597,23 +459,6 @@ PyObject *ptradd(PyObject *ptr, int offset);
// For all other datatypes (including all complex datatypes), the
// offset corresponds to bytes. This function does not perform any
// bounds checking and negative offsets are perfectly legal.
void ptrmap(char *type1, char *type2);
// This is a rarely used function that performs essentially the same
// operation as a C typedef. To manage datatypes at run-time, SWIG
// modules manage an internal symbol table of type mappings. This
// table keeps track of which types are equivalent to each other. The
// ptrmap() function provides a mechanism for scripts to add symbols
// to this table. For example :
//
// ptrmap("double_p","Real_p");
//
// would make the types "doublePtr" and "RealPtr" equivalent to each
// other. Pointers of either type could now be used interchangably.
//
// Normally this function is not needed, but it can be used to
// circumvent SWIG's normal type-checking behavior or to work around
// weird type-handling problems.