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annotate Modules/hashlib.h @ 80272:ec00f8570c55

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Merge typo fix.
author Ezio Melotti <ezio.melotti@gmail.com>
date Mon, 05 Nov 2012 22:23:16 +0200
parents 11c9a894680e
children 454e9db1c750
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ce29faed7f69 - Issue #3745: Fix hashlib to always reject unicode and non buffer-api
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1 /* Common code for use by all hashlib related modules. */
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2
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3 /*
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4 * Given a PyObject* obj, fill in the Py_buffer* viewp with the result
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5 * of PyObject_GetBuffer. Sets and exception and issues a return NULL
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6 * on any errors.
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7 */
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8 #define GET_BUFFER_VIEW_OR_ERROUT(obj, viewp) do { \
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9 if (PyUnicode_Check((obj))) { \
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10 PyErr_SetString(PyExc_TypeError, \
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11 "Unicode-objects must be encoded before hashing");\
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12 return NULL; \
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13 } \
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14 if (!PyObject_CheckBuffer((obj))) { \
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15 PyErr_SetString(PyExc_TypeError, \
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16 "object supporting the buffer API required"); \
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17 return NULL; \
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18 } \
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19 if (PyObject_GetBuffer((obj), (viewp), PyBUF_SIMPLE) == -1) { \
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20 return NULL; \
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21 } \
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22 if ((viewp)->ndim > 1) { \
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23 PyErr_SetString(PyExc_BufferError, \
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24 "Buffer must be single dimension"); \
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25 PyBuffer_Release((viewp)); \
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26 return NULL; \
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27 } \
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28 } while(0);
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30 /*
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31 * Helper code to synchronize access to the hash object when the GIL is
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32 * released around a CPU consuming hashlib operation. All code paths that
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33 * access a mutable part of obj must be enclosed in a ENTER_HASHLIB /
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34 * LEAVE_HASHLIB block or explicitly acquire and release the lock inside
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35 * a PY_BEGIN / END_ALLOW_THREADS block if they wish to release the GIL for
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36 * an operation.
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37 */
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38
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39 #ifdef WITH_THREAD
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40 #include "pythread.h"
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41 #define ENTER_HASHLIB(obj) \
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42 if ((obj)->lock) { \
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43 if (!PyThread_acquire_lock((obj)->lock, 0)) { \
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44 Py_BEGIN_ALLOW_THREADS \
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45 PyThread_acquire_lock((obj)->lock, 1); \
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46 Py_END_ALLOW_THREADS \
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47 } \
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48 }
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49 #define LEAVE_HASHLIB(obj) \
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50 if ((obj)->lock) { \
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51 PyThread_release_lock((obj)->lock); \
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52 }
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53 #else
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54 #define ENTER_HASHLIB(obj)
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55 #define LEAVE_HASHLIB(obj)
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56 #endif
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57
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58 /* TODO(gps): We should probably make this a module or EVPobject attribute
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59 * to allow the user to optimize based on the platform they're using. */
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60 #define HASHLIB_GIL_MINSIZE 2048
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61