Mailing List Archive

Update of /cvsroot/python/python/nondist/sandbox/ast
In directory usw-pr-cvs1:/tmp/cvs-serv29606

Modified Files:
asdl.h setup.py
Added Files:
asdl.c
Log Message:
Add the beginnings of an ASDL sequence type (like PyListObject).


--- NEW FILE: asdl.c ---
#include "Python.h"
#include "asdl.h"

static asdl_seq *
asdl_list_new(int size)
{
asdl_seq *seq = (asdl_seq *)malloc(sizeof(asdl_seq));
if (!seq)
return NULL;
seq->elements = malloc(sizeof(void *) * size);
if (!seq->elements) {
free(seq);
return NULL;
}
seq->size = size;
seq->used = 0;
return seq;
}

static void *
asdl_get(asdl_seq *seq, int offset)
{
if (offset > seq->used)
return NULL;
return seq->elements[offset];
}

static int
append(asdl_seq *seq, void *elt)
{
if (seq->size == seq->used) {
void *newptr;
int nsize = seq->size * 2;
newptr = realloc(seq->elements, sizeof(void *) * nsize);
if (!newptr)
return 0;
seq->elements = newptr;
}
seq->elements[seq->size++] = elt;
return 1;
}

Index: asdl.h
===================================================================
RCS file: /cvsroot/python/python/nondist/sandbox/ast/asdl.h,v
retrieving revision 1.1
retrieving revision 1.2
diff -C2 -d -r1.1 -r1.2
*** asdl.h 9 Apr 2002 19:13:19 -0000 1.1
--- asdl.h 12 Apr 2002 15:56:43 -0000 1.2
***************
*** 1,3 ****
! #define identifier const char *
#define bool int
#define string const char *
--- 1,20 ----
! #define identifier PyObject *
#define bool int
#define string const char *
+
+ /* It would be nice if the code generated by asdl_c.py was completely
+ independent of Python, but it is a goal the requires too much work
+ at this stage. So, for example, I'll represent identifiers as
+ interned Python strings.
+ */
+
+ typedef struct {
+ int size;
+ int used;
+ void **elements;
+ } asdl_seq;
+
+ asdl_seq *asdl_list_new(int size);
+ void *asdl_get(asdl_seq *seq, int offset);
+ int append(asdl_seq *seq, void *elt);
+

Index: setup.py
===================================================================
RCS file: /cvsroot/python/python/nondist/sandbox/ast/setup.py,v
retrieving revision 1.1
retrieving revision 1.2
diff -C2 -d -r1.1 -r1.2
*** setup.py 11 Apr 2002 21:20:19 -0000 1.1
--- setup.py 12 Apr 2002 15:56:43 -0000 1.2
***************
*** 3,7 ****

ast = Extension(name="ast",
! sources=["astmodule.c", "Python-ast.c"])

setup(name="ast",
--- 3,7 ----

ast = Extension(name="ast",
! sources=["astmodule.c", "Python-ast.c", "asdl.c"])

setup(name="ast",
***************
*** 9,11 ****

import ast
! ast.transform("1 + 2")
--- 9,11 ----

import ast
! ast.transform("global xyz")