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d0aa965c0a
Python Py*_New() functions can fail and return NULL in out-of-memory conditions. The previous code handled that inconsistently or not at all. This change organizes that better. If we are in a function that is called from Python, we just check for failure and return NULL ourselves, which will cause any exception information to be passed up. If we are called from PostgreSQL, we consistently create an "out of memory" error. Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
#include "postgres.h"
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#include "fmgr.h"
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#include "plpython.h"
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#include "ltree.h"
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PG_MODULE_MAGIC;
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extern void _PG_init(void);
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/* Linkage to functions in plpython module */
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#if PY_MAJOR_VERSION >= 3
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typedef PyObject *(*PLyUnicode_FromStringAndSize_t) (const char *s, Py_ssize_t size);
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static PLyUnicode_FromStringAndSize_t PLyUnicode_FromStringAndSize_p;
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#endif
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/*
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* Module initialize function: fetch function pointers for cross-module calls.
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*/
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void
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_PG_init(void)
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{
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/* Asserts verify that typedefs above match original declarations */
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#if PY_MAJOR_VERSION >= 3
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AssertVariableIsOfType(&PLyUnicode_FromStringAndSize, PLyUnicode_FromStringAndSize_t);
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PLyUnicode_FromStringAndSize_p = (PLyUnicode_FromStringAndSize_t)
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load_external_function("$libdir/" PLPYTHON_LIBNAME, "PLyUnicode_FromStringAndSize",
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true, NULL);
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#endif
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}
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/* These defines must be after the module init function */
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#define PLyUnicode_FromStringAndSize PLyUnicode_FromStringAndSize_p
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PG_FUNCTION_INFO_V1(ltree_to_plpython);
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Datum
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ltree_to_plpython(PG_FUNCTION_ARGS)
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{
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ltree *in = PG_GETARG_LTREE_P(0);
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int i;
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PyObject *list;
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ltree_level *curlevel;
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list = PyList_New(in->numlevel);
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if (!list)
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ereport(ERROR,
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(errcode(ERRCODE_OUT_OF_MEMORY),
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errmsg("out of memory")));
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curlevel = LTREE_FIRST(in);
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for (i = 0; i < in->numlevel; i++)
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{
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PyList_SetItem(list, i, PyString_FromStringAndSize(curlevel->name, curlevel->len));
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curlevel = LEVEL_NEXT(curlevel);
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}
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PG_FREE_IF_COPY(in, 0);
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return PointerGetDatum(list);
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}
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