PostgreSQL Source Code git master
ltree_plpython.c
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1#include "postgres.h"
2
3#include "fmgr.h"
4#include "ltree/ltree.h"
5#include "plpython.h"
6
8
9/* Linkage to functions in plpython module */
10typedef PyObject *(*PLyUnicode_FromStringAndSize_t) (const char *s, Py_ssize_t size);
12
13
14/*
15 * Module initialize function: fetch function pointers for cross-module calls.
16 */
17void
19{
20 /* Asserts verify that typedefs above match original declarations */
23 load_external_function("$libdir/" PLPYTHON_LIBNAME, "PLyUnicode_FromStringAndSize",
24 true, NULL);
25}
26
27
28/* These defines must be after the module init function */
29#define PLyUnicode_FromStringAndSize PLyUnicode_FromStringAndSize_p
30
31
33
36{
37 ltree *in = PG_GETARG_LTREE_P(0);
38 int i;
39 PyObject *list;
40 ltree_level *curlevel;
41
42 list = PyList_New(in->numlevel);
43 if (!list)
45 (errcode(ERRCODE_OUT_OF_MEMORY),
46 errmsg("out of memory")));
47
48 curlevel = LTREE_FIRST(in);
49 for (i = 0; i < in->numlevel; i++)
50 {
51 PyList_SetItem(list, i, PLyUnicode_FromStringAndSize(curlevel->name, curlevel->len));
52 curlevel = LEVEL_NEXT(curlevel);
53 }
54
55 PG_FREE_IF_COPY(in, 0);
56
57 return PointerGetDatum(list);
58}
#define AssertVariableIsOfType(varname, typename)
Definition: c.h:938
void * load_external_function(const char *filename, const char *funcname, bool signalNotFound, void **filehandle)
Definition: dfmgr.c:95
int errcode(int sqlerrcode)
Definition: elog.c:853
int errmsg(const char *fmt,...)
Definition: elog.c:1070
#define ERROR
Definition: elog.h:39
#define ereport(elevel,...)
Definition: elog.h:149
#define PG_FREE_IF_COPY(ptr, n)
Definition: fmgr.h:260
#define PG_FUNCTION_ARGS
Definition: fmgr.h:193
int i
Definition: isn.c:72
#define LTREE_FIRST(x)
Definition: ltree.h:51
#define LEVEL_NEXT(x)
Definition: ltree.h:40
#define PG_GETARG_LTREE_P(n)
Definition: ltree.h:218
#define PLyUnicode_FromStringAndSize
void _PG_init(void)
PG_MODULE_MAGIC
Definition: ltree_plpython.c:7
PyObject *(* PLyUnicode_FromStringAndSize_t)(const char *s, Py_ssize_t size)
static PLyUnicode_FromStringAndSize_t PLyUnicode_FromStringAndSize_p
Datum ltree_to_plpython(PG_FUNCTION_ARGS)
PG_FUNCTION_INFO_V1(ltree_to_plpython)
static Datum PointerGetDatum(const void *X)
Definition: postgres.h:327
uintptr_t Datum
Definition: postgres.h:69
static pg_noinline void Size size
Definition: slab.c:607
char name[FLEXIBLE_ARRAY_MEMBER]
Definition: ltree.h:36
uint16 len
Definition: ltree.h:35
Definition: ltree.h:43
uint16 numlevel
Definition: ltree.h:45