annotate mercurial/util.h @ 27015:341cb90ffd18

util: disable floating point stat times (issue4836) Alternate fix for this issue which avoids putting extra function calls and exception handling in the fast path. For almost all purposes, integer timestamps are preferable to Mercurial. It stores integer timestamps in the dirstate and would thus like to avoid doing any float/int comparisons or conversions. We will continue to have to deal with 1-second granularity on filesystems for quite some time, so this won't significantly hinder our capabilities. This has some impact on our file cache validation code in that it lowers timestamp resolution. But as we still have to deal with low-resolution filesystems, we're not relying on this anyway. An alternate approach is to use stat[ST_MTIME], which is guaranteed to be an integer. But since this support isn't already in our extension, we can't depend on it being available without adding a hard Python->C API dependency that's painful for people like yours truly who have bisect regularly and people without compilers.
author Matt Mackall <mpm@selenic.com>
date Thu, 19 Nov 2015 13:21:24 -0600
parents 14bf7679fb68
children 284d742e5611
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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 #if PY_MAJOR_VERSION >= 3
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12
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13 #define IS_PY3K
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14 #define PyInt_FromLong PyLong_FromLong
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15 #define PyInt_AsLong PyLong_AsLong
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17 /*
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18 Mapping of some of the python < 2.x PyString* functions to py3k's PyUnicode.
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19
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20 The commented names below represent those that are present in the PyBytes
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21 definitions for python < 2.6 (below in this file) that don't have a direct
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22 implementation.
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23 */
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24
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25 #define PyStringObject PyUnicodeObject
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26 #define PyString_Type PyUnicode_Type
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27
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28 #define PyString_Check PyUnicode_Check
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29 #define PyString_CheckExact PyUnicode_CheckExact
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30 #define PyString_CHECK_INTERNED PyUnicode_CHECK_INTERNED
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31 #define PyString_AS_STRING PyUnicode_AsLatin1String
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32 #define PyString_GET_SIZE PyUnicode_GET_SIZE
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33
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34 #define PyString_FromStringAndSize PyUnicode_FromStringAndSize
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35 #define PyString_FromString PyUnicode_FromString
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36 #define PyString_FromFormatV PyUnicode_FromFormatV
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37 #define PyString_FromFormat PyUnicode_FromFormat
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38 /* #define PyString_Size PyUnicode_GET_SIZE */
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39 /* #define PyString_AsString */
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40 /* #define PyString_Repr */
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41 #define PyString_Concat PyUnicode_Concat
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42 #define PyString_ConcatAndDel PyUnicode_AppendAndDel
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43 #define _PyString_Resize PyUnicode_Resize
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44 /* #define _PyString_Eq */
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45 #define PyString_Format PyUnicode_Format
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46 /* #define _PyString_FormatLong */
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47 /* #define PyString_DecodeEscape */
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48 #define _PyString_Join PyUnicode_Join
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49 #define PyString_Decode PyUnicode_Decode
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50 #define PyString_Encode PyUnicode_Encode
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51 #define PyString_AsEncodedObject PyUnicode_AsEncodedObject
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52 #define PyString_AsEncodedString PyUnicode_AsEncodedString
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53 #define PyString_AsDecodedObject PyUnicode_AsDecodedObject
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54 #define PyString_AsDecodedString PyUnicode_AsDecodedUnicode
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55 /* #define PyString_AsStringAndSize */
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56 #define _PyString_InsertThousandsGrouping _PyUnicode_InsertThousandsGrouping
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57
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58 #endif /* PY_MAJOR_VERSION */
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59
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60 #ifdef _WIN32
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61 #ifdef _MSC_VER
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62 /* msvc 6.0 has problems */
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63 #define inline __inline
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64 typedef signed char int8_t;
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65 typedef short int16_t;
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66 typedef long int32_t;
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67 typedef __int64 int64_t;
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68 typedef unsigned char uint8_t;
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69 typedef unsigned short uint16_t;
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70 typedef unsigned long uint32_t;
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71 typedef unsigned __int64 uint64_t;
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72 #else
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73 #include <stdint.h>
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74 #endif
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75 #else
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76 /* not windows */
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77 #include <sys/types.h>
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78 #if defined __BEOS__ && !defined __HAIKU__
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79 #include <ByteOrder.h>
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80 #else
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81 #include <arpa/inet.h>
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82 #endif
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83 #include <inttypes.h>
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84 #endif
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85
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86 #if defined __hpux || defined __SUNPRO_C || defined _AIX
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87 #define inline
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88 #endif
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89
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90 #ifdef __linux
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91 #define inline __inline
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92 #endif
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93
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94 typedef struct {
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95 PyObject_HEAD
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96 char state;
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97 int mode;
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98 int size;
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99 int mtime;
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100 } dirstateTupleObject;
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101
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102 extern PyTypeObject dirstateTupleType;
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103 #define dirstate_tuple_check(op) (Py_TYPE(op) == &dirstateTupleType)
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104
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105 static inline uint32_t getbe32(const char *c)
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106 {
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107 const unsigned char *d = (const unsigned char *)c;
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108
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109 return ((d[0] << 24) |
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110 (d[1] << 16) |
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111 (d[2] << 8) |
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112 (d[3]));
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113 }
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114
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115 static inline int16_t getbeint16(const char *c)
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116 {
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117 const unsigned char *d = (const unsigned char *)c;
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118
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119 return ((d[0] << 8) |
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120 (d[1]));
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121 }
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122
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123 static inline uint16_t getbeuint16(const char *c)
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124 {
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125 const unsigned char *d = (const unsigned char *)c;
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126
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127 return ((d[0] << 8) |
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128 (d[1]));
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129 }
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130
16437
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131 static inline void putbe32(uint32_t x, char *c)
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132 {
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133 c[0] = (x >> 24) & 0xff;
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134 c[1] = (x >> 16) & 0xff;
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135 c[2] = (x >> 8) & 0xff;
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136 c[3] = (x) & 0xff;
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137 }
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138
24016
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139 static inline double getbefloat64(const char *c)
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140 {
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141 const unsigned char *d = (const unsigned char *)c;
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142 double ret;
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143 int i;
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144 uint64_t t = 0;
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145 for (i = 0; i < 8; i++) {
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146 t = (t<<8) + d[i];
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147 }
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148 memcpy(&ret, &t, sizeof(t));
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149 return ret;
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150 }
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151
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parents: 24443
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152 /* This should be kept in sync with normcasespecs in encoding.py. */
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153 enum normcase_spec {
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154 NORMCASE_LOWER = -1,
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155 NORMCASE_UPPER = 1,
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156 NORMCASE_OTHER = 0
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157 };
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158
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parents: 24442
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159 #define MIN(a, b) (((a)<(b))?(a):(b))
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160 /* VC9 doesn't include bool and lacks stdbool.h based on my searching */
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Kevin Bullock <kbullock@ringworld.org>
parents: 24823
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161 #if defined(_MSC_VER) || __STDC_VERSION__ < 199901L
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162 #define true 1
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163 #define false 0
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164 typedef unsigned char bool;
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165 #else
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166 #include <stdbool.h>
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167 #endif
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168
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4494fb02d549 util.h: Utility macros for handling different Python APIs.
Renato Cunha <renatoc@gmail.com>
parents:
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169 #endif /* _HG_UTIL_H_ */