PostgreSQL Source Code  git master
plpy_util.c File Reference
#include "postgres.h"
#include "mb/pg_wchar.h"
#include "plpy_elog.h"
#include "plpy_util.h"
#include "plpython.h"
#include "utils/memutils.h"
Include dependency graph for plpy_util.c:

Go to the source code of this file.

Functions

PyObject * PLyUnicode_Bytes (PyObject *unicode)
 
char * PLyUnicode_AsString (PyObject *unicode)
 
PyObject * PLyUnicode_FromStringAndSize (const char *s, Py_ssize_t size)
 
PyObject * PLyUnicode_FromString (const char *s)
 

Function Documentation

◆ PLyUnicode_AsString()

char* PLyUnicode_AsString ( PyObject *  unicode)

Definition at line 83 of file plpy_util.c.

84 {
85  PyObject *o = PLyUnicode_Bytes(unicode);
86  char *rv = pstrdup(PyBytes_AsString(o));
87 
88  Py_XDECREF(o);
89  return rv;
90 }
char * pstrdup(const char *in)
Definition: mcxt.c:1483
PyObject * PLyUnicode_Bytes(PyObject *unicode)
Definition: plpy_util.c:21

References PLyUnicode_Bytes(), and pstrdup().

Referenced by get_string_attr(), object_to_string(), PLy_cursor_plan(), PLy_exec_trigger(), PLy_get_sqlerrcode(), PLy_modify_tuple(), PLy_output(), PLy_spi_execute_plan(), PLy_spi_prepare(), and PLy_traceback().

◆ PLyUnicode_Bytes()

PyObject* PLyUnicode_Bytes ( PyObject *  unicode)

Definition at line 21 of file plpy_util.c.

22 {
23  PyObject *bytes,
24  *rv;
25  char *utf8string,
26  *encoded;
27 
28  /* First encode the Python unicode object with UTF-8. */
29  bytes = PyUnicode_AsUTF8String(unicode);
30  if (bytes == NULL)
31  PLy_elog(ERROR, "could not convert Python Unicode object to bytes");
32 
33  utf8string = PyBytes_AsString(bytes);
34  if (utf8string == NULL)
35  {
36  Py_DECREF(bytes);
37  PLy_elog(ERROR, "could not extract bytes from encoded string");
38  }
39 
40  /*
41  * Then convert to server encoding if necessary.
42  *
43  * PyUnicode_AsEncodedString could be used to encode the object directly
44  * in the server encoding, but Python doesn't support all the encodings
45  * that PostgreSQL does (EUC_TW and MULE_INTERNAL). UTF-8 is used as an
46  * intermediary in PLyUnicode_FromString as well.
47  */
49  {
50  PG_TRY();
51  {
52  encoded = pg_any_to_server(utf8string,
53  strlen(utf8string),
54  PG_UTF8);
55  }
56  PG_CATCH();
57  {
58  Py_DECREF(bytes);
59  PG_RE_THROW();
60  }
61  PG_END_TRY();
62  }
63  else
64  encoded = utf8string;
65 
66  /* finally, build a bytes object in the server encoding */
67  rv = PyBytes_FromStringAndSize(encoded, strlen(encoded));
68 
69  /* if pg_any_to_server allocated memory, free it now */
70  if (utf8string != encoded)
71  pfree(encoded);
72 
73  Py_DECREF(bytes);
74  return rv;
75 }
#define PG_RE_THROW()
Definition: elog.h:350
#define PG_TRY(...)
Definition: elog.h:309
#define PG_END_TRY(...)
Definition: elog.h:334
#define ERROR
Definition: elog.h:35
#define PG_CATCH(...)
Definition: elog.h:319
#define PLy_elog
char * pg_any_to_server(const char *s, int len, int encoding)
Definition: mbutils.c:676
int GetDatabaseEncoding(void)
Definition: mbutils.c:1210
void pfree(void *pointer)
Definition: mcxt.c:1306
@ PG_UTF8
Definition: pg_wchar.h:232

References ERROR, GetDatabaseEncoding(), pfree(), pg_any_to_server(), PG_CATCH, PG_END_TRY, PG_RE_THROW, PG_TRY, PG_UTF8, and PLy_elog.

Referenced by PLyObject_AsString(), and PLyUnicode_AsString().

◆ PLyUnicode_FromString()

PyObject* PLyUnicode_FromString ( const char *  s)

Definition at line 118 of file plpy_util.c.

119 {
120  return PLyUnicode_FromStringAndSize(s, strlen(s));
121 }
PyObject * PLyUnicode_FromStringAndSize(const char *s, Py_ssize_t size)
Definition: plpy_util.c:97

References PLyUnicode_FromStringAndSize().

Referenced by PLy_generate_spi_exceptions(), PLy_quote_ident(), PLy_quote_literal(), PLy_quote_nullable(), PLy_result_colnames(), PLy_trigger_build_args(), PLyUnicode_FromScalar(), and set_string_attr().

◆ PLyUnicode_FromStringAndSize()

PyObject* PLyUnicode_FromStringAndSize ( const char *  s,
Py_ssize_t  size 
)

Definition at line 97 of file plpy_util.c.

98 {
99  char *utf8string;
100  PyObject *o;
101 
102  utf8string = pg_server_to_any(s, size, PG_UTF8);
103 
104  if (utf8string == s)
105  {
106  o = PyUnicode_FromStringAndSize(s, size);
107  }
108  else
109  {
110  o = PyUnicode_FromString(utf8string);
111  pfree(utf8string);
112  }
113 
114  return o;
115 }
char * pg_server_to_any(const char *s, int len, int encoding)
Definition: mbutils.c:749

References pfree(), pg_server_to_any(), and PG_UTF8.

Referenced by PLyUnicode_FromString().