annotate mercurial/cext/util.h @ 34950:cffc8a22ce0c stable

merge with i18n
author Augie Fackler <augie@google.com>
date Wed, 01 Nov 2017 16:07:33 -0400
parents 3455e2e2ce9b
children 440e8fce29e7
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4494fb02d549 util.h: Utility macros for handling different Python APIs.
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1 /*
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2 util.h - utility functions for interfacing with the various python APIs.
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3
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4 This software may be used and distributed according to the terms of
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5 the GNU General Public License, incorporated herein by reference.
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6 */
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7
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8 #ifndef _HG_UTIL_H_
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9 #define _HG_UTIL_H_
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10
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11 #include "compat.h"
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12
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13 #if PY_MAJOR_VERSION >= 3
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14 #define IS_PY3K
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15 #endif
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16
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17 /* clang-format off */
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18 typedef struct {
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19 PyObject_HEAD
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20 char state;
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21 int mode;
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22 int size;
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23 int mtime;
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24 } dirstateTupleObject;
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25 /* clang-format on */
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26
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27 extern PyTypeObject dirstateTupleType;
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28 #define dirstate_tuple_check(op) (Py_TYPE(op) == &dirstateTupleType)
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29
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30 #define MIN(a, b) (((a) < (b)) ? (a) : (b))
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31 /* VC9 doesn't include bool and lacks stdbool.h based on my searching */
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32 #if defined(_MSC_VER) || __STDC_VERSION__ < 199901L
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33 #define true 1
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34 #define false 0
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35 typedef unsigned char bool;
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36 #else
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37 #include <stdbool.h>
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38 #endif
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39
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40 static inline PyObject *_dict_new_presized(Py_ssize_t expected_size)
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41 {
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42 /* _PyDict_NewPresized expects a minused parameter, but it actually
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43 creates a dictionary that's the nearest power of two bigger than the
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44 parameter. For example, with the initial minused = 1000, the
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45 dictionary created has size 1024. Of course in a lot of cases that
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46 can be greater than the maximum load factor Python's dict object
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47 expects (= 2/3), so as soon as we cross the threshold we'll resize
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48 anyway. So create a dictionary that's at least 3/2 the size. */
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49 return _PyDict_NewPresized(((1 + expected_size) / 2) * 3);
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50 }
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51
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52 #endif /* _HG_UTIL_H_ */