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Issue #15242: Have PyImport_GetMagicTag() return a const char *

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defined in sysmodule.c instead of straight out of a Unicode object.

Thanks to Amaury Forgeot d'Arc for noticing the bug and Eric Snow for
writing the patch.
This commit is contained in:
Brett Cannon 2012-07-09 14:22:12 -04:00
parent 903c27c177
commit 3adc7b75a5
3 changed files with 24 additions and 29 deletions
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18
Python/import.c
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@ -116,7 +116,7 @@ typedef unsigned short mode_t;
*/
#define MAGIC (3230 | ((long)'\r'<<16) | ((long)'\n'<<24))
#define CACHEDIR "__pycache__"
/* Current magic word and string tag as globals. */
/* Current magic word as global. */
static long pyc_magic = MAGIC;
/* See _PyImport_FixupExtensionObject() below */
@ -520,22 +520,12 @@ PyImport_GetMagicNumber(void)
}
extern const char * _PySys_ImplCacheTag;
const char *
PyImport_GetMagicTag(void)
{
PyObject *impl, *tag;
const char *raw_tag;
/* We could also pull it from imp or importlib. */
impl = PySys_GetObject("implementation");
if (impl == NULL)
return NULL;
tag = PyObject_GetAttrString(impl, "cache_tag");
if (tag == NULL)
return NULL;
raw_tag = PyUnicode_DATA(tag);
Py_DECREF(tag);
return raw_tag;
return _PySys_ImplCacheTag;
}