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wxWidgets/wxPython/wxSWIG/SWIG/parms.cxx
Robin Dunn c90f71dd8c Since I have made several changes to SWIG over the years to accomodate 
special cases and other things in wxPython, and since I plan on making
several more, I've decided to put the SWIG sources in wxPython's CVS
instead of relying on maintaining patches.  This effectivly becomes a
fork of an obsolete version of SWIG, :-( but since SWIG 1.3 still
doesn't have some things I rely on in 1.1, not to mention that my
custom patches would all have to be redone, I felt that this is the
easier road to take.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@15307 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2002-04-29 19:56:57 +00:00

479 lines
13 KiB
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/*******************************************************************************
* Simplified Wrapper and Interface Generator (SWIG)
*
* Author : David Beazley
*
* Department of Computer Science
* University of Chicago
* 1100 E 58th Street
* Chicago, IL 60637
* beazley@cs.uchicago.edu
*
* Please read the file LICENSE for the copyright and terms by which SWIG
* can be used and distributed.
*******************************************************************************/
/* ------------------------------------------------------------------------
$Header$
parms.cxx
This file is used to manage function parameters and parameter lists.
Rewritten (10/27) to solve a bunch of problems with memory management
and proper cleanup of things.
------------------------------------------------------------------------ */
#include "swig.h"
// ------------------------------------------------------------------------
// Parm::Parm(DataType *type, char *n)
//
// Create a new parameter from datatype 'type' and name 'n'.
// Copies will be made of type and n, unless they aren't specified.
// ------------------------------------------------------------------------
Parm::Parm(DataType *type, char *n) {
if (type) {
t = new DataType(type);
} else {
t = 0;
}
name = copy_string(n);
call_type = 0;
defvalue = 0;
ignore = 0;
objc_separator = 0;
}
// ------------------------------------------------------------------------
// Parm::Parm(Parm *p)
//
// Make a copy of a parameter
// ------------------------------------------------------------------------
Parm::Parm(Parm *p) {
if (p->t) t = new DataType(p->t);
name = copy_string(p->name);
call_type = p->call_type;
defvalue = copy_string(p->defvalue);
ignore = p->ignore;
objc_separator = copy_string(p->objc_separator);
}
// ------------------------------------------------------------------------
// Parm::~Parm()
//
// Destroy a parameter
// ------------------------------------------------------------------------
Parm::~Parm() {
if (t) delete t;
if (name) delete name;
if (defvalue) delete defvalue;
if (objc_separator) delete objc_separator;
}
/********************************************************************
class ParmList
These functions are used to manipulate lists of parameters
********************************************************************/
// ------------------------------------------------------------------
// ParmList::ParmList()
//
// Create a new (empty) parameter list
// ------------------------------------------------------------------
ParmList::ParmList() {
nparms = 0;
maxparms = MAXPARMS;
parms = new Parm *[maxparms]; // Create an array of parms
for (int i = 0; i < MAXPARMS; i++)
parms[i] = (Parm *) 0;
}
// ------------------------------------------------------------------
// ParmList::ParmList(ParmList *l)
//
// Make a copy of parameter list
// ------------------------------------------------------------------
ParmList::ParmList(ParmList *l) {
int i;
if (l) {
nparms = l->nparms;
maxparms = l->maxparms;
parms = new Parm *[maxparms];
for (i = 0; i < maxparms; i++) {
if (l->parms[i])
parms[i] = new Parm(l->parms[i]);
else
parms[i] = 0;
}
} else {
nparms = 0;
maxparms = MAXPARMS;
parms = new Parm *[maxparms]; // Create an array of parms
for (i = 0; i < MAXPARMS; i++)
parms[i] = (Parm *) 0;
}
}
// ------------------------------------------------------------------
// ParmList::~ParmList()
//
// Delete a parameter list
// ------------------------------------------------------------------
ParmList::~ParmList() {
for (int i = 0; i < maxparms; i++) {
if (parms[i]) delete parms[i];
}
}
// ------------------------------------------------------------------
// void ParmList::moreparms() (PRIVATE)
//
// Doubles the amount of parameter memory available.
// ------------------------------------------------------------------
void ParmList::moreparms() {
Parm **newparms;
int i;
newparms = new Parm *[maxparms*2];
for (i = 0; i < 2*maxparms; i++)
newparms[i] = (Parm *) 0;
for (i = 0; i < maxparms; i++) {
newparms[i] = parms[i];
}
maxparms = 2*maxparms;
delete parms;
parms = newparms;
}
// ------------------------------------------------------------------
// void ParmList::append(Parm *p)
//
// Add a new parameter to the end of a parameter list
// ------------------------------------------------------------------
void ParmList::append(Parm *p) {
if (nparms == maxparms) moreparms();
// Add parm onto the end
parms[nparms] = new Parm(p);
nparms++;
}
// ------------------------------------------------------------------
// void ParmList::insert(Parm *p, int pos)
//
// Inserts a parameter at position pos. Parameters are inserted
// *before* any existing parameter at position pos.
// ------------------------------------------------------------------
void ParmList::insert(Parm *p, int pos) {
// If pos is out of range, we'd better fix it
if (pos < 0) pos = 0;
if (pos > nparms) pos = nparms;
// If insertion is going to need more memory, take care of that now
if (nparms >= maxparms) moreparms();
// Now shift all of the existing parms to the right
for (int i = nparms; i > pos; i--) {
parms[i] = parms[i-1];
}
// Set new parameter
parms[pos] = new Parm(p);
nparms++;
}
// ------------------------------------------------------------------
// void ParmList::del(int pos)
//
// Deletes the parameter at position pos.
// ------------------------------------------------------------------
void ParmList::del(int pos) {
if (nparms <= 0) return;
if (pos < 0) pos = 0;
if (pos >= nparms) pos = nparms-1;
// Delete the parameter (if it exists)
if (parms[pos]) delete parms[pos];
// Now slide all of the parameters to the left
for (int i = pos; i < nparms-1; i++) {
parms[i] = parms[i+1];
}
nparms--;
}
// ------------------------------------------------------------------
// Parm *ParmList::get(int pos)
//
// Gets the parameter at location pos. Returns 0 if invalid
// position.
// ------------------------------------------------------------------
Parm *ParmList::get(int pos) {
if ((pos < 0) || (pos >= nparms)) return 0;
return parms[pos];
}
// ------------------------------------------------------------------
// int ParmList::numopt()
//
// Gets the number of optional arguments.
// ------------------------------------------------------------------
int ParmList::numopt() {
int n = 0;
int state = 0;
for (int i = 0; i < nparms; i++) {
if (parms[i]->defvalue) {
n++;
state = 1;
} else if (typemap_check("default",typemap_lang,parms[i]->t,parms[i]->name)) {
n++;
state = 1;
} else if (typemap_check("ignore",typemap_lang,parms[i]->t,parms[i]->name)) {
n++;
} else if (typemap_check("build",typemap_lang,parms[i]->t,parms[i]->name)) {
n++;
} else {
if (state) {
fprintf(stderr,"%s : Line %d. Argument %d must have a default value!\n", input_file,line_number,i+1);
}
}
}
return n;
}
// ------------------------------------------------------------------
// int ParmList::numarg()
//
// Gets the number of arguments
// ------------------------------------------------------------------
int ParmList::numarg() {
int n = 0;
for (int i = 0; i < nparms; i++) {
if (!parms[i]->ignore)
n++;
}
return n;
}
// ------------------------------------------------------------------
// Parm &ParmList::operator[](int n)
//
// Returns parameter n in the parameter list. May generate
// an error if that parameter is out of range.
// ------------------------------------------------------------------
Parm &ParmList::operator[](int n) {
if ((n < 0) || (n >= nparms)) {
fprintf(stderr,"ParmList : Fatal error. subscript out of range in ParmList.operator[]\n");
SWIG_exit(1);
}
return *parms[n];
}
// ---------------------------------------------------------------------
// Parm * ParmList::get_first()
//
// Returns the first item on a parameter list.
// ---------------------------------------------------------------------
Parm *ParmList::get_first() {
current_parm = 0;
if (nparms > 0) return parms[current_parm++];
else return (Parm *) 0;
}
// ----------------------------------------------------------------------
// Parm *ParmList::get_next()
//
// Returns the next item on the parameter list.
// ----------------------------------------------------------------------
Parm * ParmList::get_next() {
if (current_parm >= nparms) return 0;
else return parms[current_parm++];
}
// ---------------------------------------------------------------------
// void ParmList::print_types(FILE *f)
//
// Prints a comma separated list of all of the parameter types.
// This is for generating valid C prototypes. Has to do some
// manipulation of pointer types depending on how the call_type
// variable has been set.
// ----------------------------------------------------------------------
void ParmList::print_types(FILE *f) {
int is_pointer;
int pn;
pn = 0;
while(pn < nparms) {
is_pointer = parms[pn]->t->is_pointer;
if (parms[pn]->t->is_reference) {
if (parms[pn]->t->is_pointer) {
parms[pn]->t->is_pointer--;
fprintf(f,"%s&", parms[pn]->t->print_real());
parms[pn]->t->is_pointer++;
} else {
fprintf(f,"%s&", parms[pn]->t->print_real());
}
} else {
if (parms[pn]->call_type & CALL_VALUE) parms[pn]->t->is_pointer++;
if (parms[pn]->call_type & CALL_REFERENCE) parms[pn]->t->is_pointer--;
fprintf(f,"%s", parms[pn]->t->print_real());
parms[pn]->t->is_pointer = is_pointer;
}
pn++;
if (pn < nparms)
fprintf(f,",");
}
}
// ---------------------------------------------------------------------
// void ParmList::print_types(String &f)
//
// Generates a comma separated list of function types. Is used in
// C++ code generation when generating hash keys and for function overloading.
// ----------------------------------------------------------------------
void ParmList::print_types(String &f) {
int is_pointer;
int pn;
pn = 0;
while(pn < nparms) {
is_pointer = parms[pn]->t->is_pointer;
if (parms[pn]->t->is_reference) {
if (parms[pn]->t->is_pointer) {
parms[pn]->t->is_pointer--;
f << parms[pn]->t->print_real() << "&";
parms[pn]->t->is_pointer++;
} else {
f << parms[pn]->t->print_real() << "&";
}
} else {
if (parms[pn]->call_type & CALL_VALUE) parms[pn]->t->is_pointer++;
if (parms[pn]->call_type & CALL_REFERENCE) parms[pn]->t->is_pointer--;
f << parms[pn]->t->print_real();
parms[pn]->t->is_pointer = is_pointer;
}
pn++;
if (pn < nparms)
f << ",";
}
}
// ---------------------------------------------------------------------
// void ParmList::print_args(FILE *f)
//
// Prints a comma separated list of all of the parameter arguments.
// ----------------------------------------------------------------------
void ParmList::print_args(FILE *f) {
int is_pointer;
int pn;
pn = 0;
while(pn < nparms) {
is_pointer = parms[pn]->t->is_pointer;
if (parms[pn]->t->is_reference) {
if (parms[pn]->t->is_pointer) {
parms[pn]->t->is_pointer--;
fprintf(f,"%s&", parms[pn]->t->print_full());
parms[pn]->t->is_pointer++;
} else {
fprintf(f,"%s&", parms[pn]->t->print_full());
}
} else {
if (parms[pn]->call_type & CALL_VALUE) parms[pn]->t->is_pointer++;
if (parms[pn]->call_type & CALL_REFERENCE) parms[pn]->t->is_pointer--;
fprintf(f,"%s", parms[pn]->t->print_full());
parms[pn]->t->is_pointer = is_pointer;
}
fprintf(f,"%s",parms[pn]->name);
pn++;
if (pn < nparms)
fprintf(f,",");
}
}
// -------------------------------------------------------------------
// int check_defined()
//
// Checks to see if all of the datatypes are defined.
// -------------------------------------------------------------------
int ParmList::check_defined() {
int a = 0;
int i;
for (i = 0; i < nparms; i++) {
if (parms[i]) {
a+=parms[i]->t->check_defined();
}
}
if (a) return 1;
else return 0;
}
// -------------------------------------------------------------------
// void ParmList::sub_parmnames(String &s)
//
// Given a string, this function substitutes all of the parameter
// names with their internal representation. Used in very special
// kinds of typemaps.
// -------------------------------------------------------------------
void ParmList::sub_parmnames(String &s) {
Parm *p;
extern char *emit_local(int i);
for (int i = 0; i < nparms; i++) {
p = get(i);
if (strlen(p->name) > 0) {
s.replaceid(p->name, emit_local(i));
}
}
}
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