Mercurial > cpython-lru_cache-weakref

annotate Objects/bytes_methods.c @ 87690:66c1c9f32567 default tip

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Add use_weakref option to functools.lru_cache The use_weakref option makes lru_cache create weak references to the function arguments when creating the cache key, which prevents them from staying in the memory forever even after all other references to them are gone. This is a proof of concept for http://bugs.python.org/issue19859
author Radomir Dopieralski <devel@sheep.art.pl>
date Tue, 03 Dec 2013 16:02:48 +0100
parents e7f6cef7a4cc
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #include "Python.h"
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2 #include "bytes_methods.h"
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3
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4 PyDoc_STRVAR_shared(_Py_isspace__doc__,
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5 "B.isspace() -> bool\n\
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6 \n\
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7 Return True if all characters in B are whitespace\n\
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8 and there is at least one character in B, False otherwise.");
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9
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10 PyObject*
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11 _Py_bytes_isspace(const char *cptr, Py_ssize_t len)
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12 {
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13 const unsigned char *p
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14 = (unsigned char *) cptr;
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15 const unsigned char *e;
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16
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17 /* Shortcut for single character strings */
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18 if (len == 1 && Py_ISSPACE(*p))
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19 Py_RETURN_TRUE;
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20
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21 /* Special case for empty strings */
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22 if (len == 0)
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23 Py_RETURN_FALSE;
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24
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25 e = p + len;
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26 for (; p < e; p++) {
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27 if (!Py_ISSPACE(*p))
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28 Py_RETURN_FALSE;
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29 }
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30 Py_RETURN_TRUE;
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31 }
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32
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33
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34 PyDoc_STRVAR_shared(_Py_isalpha__doc__,
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35 "B.isalpha() -> bool\n\
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36 \n\
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37 Return True if all characters in B are alphabetic\n\
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38 and there is at least one character in B, False otherwise.");
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39
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40 PyObject*
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41 _Py_bytes_isalpha(const char *cptr, Py_ssize_t len)
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42 {
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43 const unsigned char *p
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44 = (unsigned char *) cptr;
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45 const unsigned char *e;
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46
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47 /* Shortcut for single character strings */
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48 if (len == 1 && Py_ISALPHA(*p))
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49 Py_RETURN_TRUE;
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50
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51 /* Special case for empty strings */
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52 if (len == 0)
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53 Py_RETURN_FALSE;
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54
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55 e = p + len;
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56 for (; p < e; p++) {
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57 if (!Py_ISALPHA(*p))
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58 Py_RETURN_FALSE;
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59 }
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60 Py_RETURN_TRUE;
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61 }
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62
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63
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64 PyDoc_STRVAR_shared(_Py_isalnum__doc__,
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65 "B.isalnum() -> bool\n\
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66 \n\
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67 Return True if all characters in B are alphanumeric\n\
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68 and there is at least one character in B, False otherwise.");
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69
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70 PyObject*
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71 _Py_bytes_isalnum(const char *cptr, Py_ssize_t len)
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72 {
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73 const unsigned char *p
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74 = (unsigned char *) cptr;
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75 const unsigned char *e;
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76
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77 /* Shortcut for single character strings */
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78 if (len == 1 && Py_ISALNUM(*p))
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79 Py_RETURN_TRUE;
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80
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81 /* Special case for empty strings */
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82 if (len == 0)
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83 Py_RETURN_FALSE;
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84
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85 e = p + len;
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86 for (; p < e; p++) {
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87 if (!Py_ISALNUM(*p))
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88 Py_RETURN_FALSE;
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89 }
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90 Py_RETURN_TRUE;
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91 }
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92
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93
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94 PyDoc_STRVAR_shared(_Py_isdigit__doc__,
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95 "B.isdigit() -> bool\n\
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96 \n\
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97 Return True if all characters in B are digits\n\
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98 and there is at least one character in B, False otherwise.");
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99
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100 PyObject*
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101 _Py_bytes_isdigit(const char *cptr, Py_ssize_t len)
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102 {
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103 const unsigned char *p
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104 = (unsigned char *) cptr;
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105 const unsigned char *e;
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106
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107 /* Shortcut for single character strings */
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108 if (len == 1 && Py_ISDIGIT(*p))
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109 Py_RETURN_TRUE;
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110
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111 /* Special case for empty strings */
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112 if (len == 0)
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113 Py_RETURN_FALSE;
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114
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115 e = p + len;
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116 for (; p < e; p++) {
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117 if (!Py_ISDIGIT(*p))
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118 Py_RETURN_FALSE;
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119 }
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120 Py_RETURN_TRUE;
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121 }
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122
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123
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124 PyDoc_STRVAR_shared(_Py_islower__doc__,
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125 "B.islower() -> bool\n\
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126 \n\
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127 Return True if all cased characters in B are lowercase and there is\n\
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128 at least one cased character in B, False otherwise.");
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129
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130 PyObject*
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131 _Py_bytes_islower(const char *cptr, Py_ssize_t len)
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132 {
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133 const unsigned char *p
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134 = (unsigned char *) cptr;
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135 const unsigned char *e;
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136 int cased;
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137
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138 /* Shortcut for single character strings */
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139 if (len == 1)
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140 return PyBool_FromLong(Py_ISLOWER(*p));
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141
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142 /* Special case for empty strings */
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143 if (len == 0)
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144 Py_RETURN_FALSE;
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145
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146 e = p + len;
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147 cased = 0;
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148 for (; p < e; p++) {
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149 if (Py_ISUPPER(*p))
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150 Py_RETURN_FALSE;
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151 else if (!cased && Py_ISLOWER(*p))
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152 cased = 1;
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153 }
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154 return PyBool_FromLong(cased);
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155 }
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156
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157
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158 PyDoc_STRVAR_shared(_Py_isupper__doc__,
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159 "B.isupper() -> bool\n\
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160 \n\
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161 Return True if all cased characters in B are uppercase and there is\n\
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162 at least one cased character in B, False otherwise.");
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163
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164 PyObject*
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165 _Py_bytes_isupper(const char *cptr, Py_ssize_t len)
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166 {
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167 const unsigned char *p
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168 = (unsigned char *) cptr;
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169 const unsigned char *e;
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170 int cased;
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171
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172 /* Shortcut for single character strings */
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173 if (len == 1)
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174 return PyBool_FromLong(Py_ISUPPER(*p));
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175
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176 /* Special case for empty strings */
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177 if (len == 0)
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178 Py_RETURN_FALSE;
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179
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180 e = p + len;
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181 cased = 0;
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182 for (; p < e; p++) {
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183 if (Py_ISLOWER(*p))
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184 Py_RETURN_FALSE;
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185 else if (!cased && Py_ISUPPER(*p))
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186 cased = 1;
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187 }
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188 return PyBool_FromLong(cased);
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189 }
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190
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191
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192 PyDoc_STRVAR_shared(_Py_istitle__doc__,
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193 "B.istitle() -> bool\n\
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194 \n\
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195 Return True if B is a titlecased string and there is at least one\n\
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196 character in B, i.e. uppercase characters may only follow uncased\n\
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197 characters and lowercase characters only cased ones. Return False\n\
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198 otherwise.");
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199
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200 PyObject*
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201 _Py_bytes_istitle(const char *cptr, Py_ssize_t len)
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202 {
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203 const unsigned char *p
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204 = (unsigned char *) cptr;
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205 const unsigned char *e;
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206 int cased, previous_is_cased;
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207
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208 /* Shortcut for single character strings */
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209 if (len == 1)
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210 return PyBool_FromLong(Py_ISUPPER(*p));
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211
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212 /* Special case for empty strings */
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213 if (len == 0)
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214 Py_RETURN_FALSE;
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215
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216 e = p + len;
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217 cased = 0;
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218 previous_is_cased = 0;
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219 for (; p < e; p++) {
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220 const unsigned char ch = *p;
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221
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222 if (Py_ISUPPER(ch)) {
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223 if (previous_is_cased)
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224 Py_RETURN_FALSE;
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225 previous_is_cased = 1;
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226 cased = 1;
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227 }
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228 else if (Py_ISLOWER(ch)) {
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229 if (!previous_is_cased)
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230 Py_RETURN_FALSE;
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231 previous_is_cased = 1;
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232 cased = 1;
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233 }
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234 else
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235 previous_is_cased = 0;
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236 }
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237 return PyBool_FromLong(cased);
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238 }
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239
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240
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241 PyDoc_STRVAR_shared(_Py_lower__doc__,
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242 "B.lower() -> copy of B\n\
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243 \n\
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244 Return a copy of B with all ASCII characters converted to lowercase.");
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245
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246 void
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247 _Py_bytes_lower(char *result, const char *cptr, Py_ssize_t len)
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248 {
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249 Py_ssize_t i;
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250
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251 for (i = 0; i < len; i++) {
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252 result[i] = Py_TOLOWER((unsigned char) cptr[i]);
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253 }
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254 }
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255
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256
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257 PyDoc_STRVAR_shared(_Py_upper__doc__,
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258 "B.upper() -> copy of B\n\
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259 \n\
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260 Return a copy of B with all ASCII characters converted to uppercase.");
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261
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262 void
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263 _Py_bytes_upper(char *result, const char *cptr, Py_ssize_t len)
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264 {
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265 Py_ssize_t i;
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266
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267 for (i = 0; i < len; i++) {
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268 result[i] = Py_TOUPPER((unsigned char) cptr[i]);
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269 }
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270 }
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271
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272
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273 PyDoc_STRVAR_shared(_Py_title__doc__,
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274 "B.title() -> copy of B\n\
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275 \n\
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276 Return a titlecased version of B, i.e. ASCII words start with uppercase\n\
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277 characters, all remaining cased characters have lowercase.");
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278
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279 void
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280 _Py_bytes_title(char *result, char *s, Py_ssize_t len)
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281 {
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282 Py_ssize_t i;
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283 int previous_is_cased = 0;
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284
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285 for (i = 0; i < len; i++) {
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286 int c = Py_CHARMASK(*s++);
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287 if (Py_ISLOWER(c)) {
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288 if (!previous_is_cased)
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289 c = Py_TOUPPER(c);
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290 previous_is_cased = 1;
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291 } else if (Py_ISUPPER(c)) {
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292 if (previous_is_cased)
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293 c = Py_TOLOWER(c);
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294 previous_is_cased = 1;
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295 } else
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296 previous_is_cased = 0;
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297 *result++ = c;
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298 }
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299 }
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300
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301
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302 PyDoc_STRVAR_shared(_Py_capitalize__doc__,
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303 "B.capitalize() -> copy of B\n\
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304 \n\
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305 Return a copy of B with only its first character capitalized (ASCII)\n\
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306 and the rest lower-cased.");
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307
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308 void
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309 _Py_bytes_capitalize(char *result, char *s, Py_ssize_t len)
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310 {
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311 Py_ssize_t i;
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312
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313 if (0 < len) {
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314 int c = Py_CHARMASK(*s++);
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315 if (Py_ISLOWER(c))
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316 *result = Py_TOUPPER(c);
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317 else
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318 *result = c;
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319 result++;
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320 }
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321 for (i = 1; i < len; i++) {
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322 int c = Py_CHARMASK(*s++);
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323 if (Py_ISUPPER(c))
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324 *result = Py_TOLOWER(c);
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325 else
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326 *result = c;
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327 result++;
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328 }
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329 }
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330
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331
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332 PyDoc_STRVAR_shared(_Py_swapcase__doc__,
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333 "B.swapcase() -> copy of B\n\
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334 \n\
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335 Return a copy of B with uppercase ASCII characters converted\n\
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336 to lowercase ASCII and vice versa.");
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337
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338 void
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339 _Py_bytes_swapcase(char *result, char *s, Py_ssize_t len)
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340 {
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341 Py_ssize_t i;
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342
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343 for (i = 0; i < len; i++) {
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344 int c = Py_CHARMASK(*s++);
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345 if (Py_ISLOWER(c)) {
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346 *result = Py_TOUPPER(c);
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347 }
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348 else if (Py_ISUPPER(c)) {
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349 *result = Py_TOLOWER(c);
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350 }
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351 else
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352 *result = c;
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353 result++;
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354 }
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355 }
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356
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357
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358 PyDoc_STRVAR_shared(_Py_maketrans__doc__,
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359 "B.maketrans(frm, to) -> translation table\n\
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360 \n\
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361 Return a translation table (a bytes object of length 256) suitable\n\
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362 for use in the bytes or bytearray translate method where each byte\n\
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363 in frm is mapped to the byte at the same position in to.\n\
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364 The bytes objects frm and to must be of the same length.");
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365
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366 static Py_ssize_t
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367 _getbuffer(PyObject *obj, Py_buffer *view)
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368 {
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369 PyBufferProcs *buffer = Py_TYPE(obj)->tp_as_buffer;
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370
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371 if (buffer == NULL || buffer->bf_getbuffer == NULL)
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372 {
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373 PyErr_Format(PyExc_TypeError,
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374 "Type %.100s doesn't support the buffer API",
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375 Py_TYPE(obj)->tp_name);
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376 return -1;
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377 }
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378
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379 if (buffer->bf_getbuffer(obj, view, PyBUF_SIMPLE) < 0)
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380 return -1;
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381 return view->len;
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382 }
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parents: 47301
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383
4407e4d07084 Add bytes/bytearray.maketrans() to mirror str.maketrans(), and deprecate
Georg Brandl <georg@python.org>
parents: 47301
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384 PyObject *
4407e4d07084 Add bytes/bytearray.maketrans() to mirror str.maketrans(), and deprecate
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parents: 47301
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385 _Py_bytes_maketrans(PyObject *args)
4407e4d07084 Add bytes/bytearray.maketrans() to mirror str.maketrans(), and deprecate
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386 {
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Antoine Pitrou <solipsis@pitrou.net>
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387 PyObject *frm, *to, *res = NULL;
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388 Py_buffer bfrm, bto;
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Antoine Pitrou <solipsis@pitrou.net>
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389 Py_ssize_t i;
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Antoine Pitrou <solipsis@pitrou.net>
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390 char *p;
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cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56515
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391
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392 bfrm.len = -1;
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393 bto.len = -1;
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parents: 47301
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394
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e783c7d5ae36 Fix indentation and remove dead code.
Antoine Pitrou <solipsis@pitrou.net>
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395 if (!PyArg_ParseTuple(args, "OO:maketrans", &frm, &to))
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Antoine Pitrou <solipsis@pitrou.net>
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396 return NULL;
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Antoine Pitrou <solipsis@pitrou.net>
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397 if (_getbuffer(frm, &bfrm) < 0)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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398 return NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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399 if (_getbuffer(to, &bto) < 0)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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400 goto done;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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401 if (bfrm.len != bto.len) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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402 PyErr_Format(PyExc_ValueError,
e783c7d5ae36 Fix indentation and remove dead code.
Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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403 "maketrans arguments must have same length");
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Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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404 goto done;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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405 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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406 res = PyBytes_FromStringAndSize(NULL, 256);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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407 if (!res) {
e783c7d5ae36 Fix indentation and remove dead code.
Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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408 goto done;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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409 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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410 p = PyBytes_AS_STRING(res);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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411 for (i = 0; i < 256; i++)
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Antoine Pitrou <solipsis@pitrou.net>
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412 p[i] = (char) i;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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413 for (i = 0; i < bfrm.len; i++) {
e783c7d5ae36 Fix indentation and remove dead code.
Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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414 p[((unsigned char *)bfrm.buf)[i]] = ((char *)bto.buf)[i];
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Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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415 }
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parents: 47301
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416
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e783c7d5ae36 Fix indentation and remove dead code.
Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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417 done:
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Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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418 if (bfrm.len != -1)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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419 PyBuffer_Release(&bfrm);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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420 if (bto.len != -1)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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421 PyBuffer_Release(&bto);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 62802
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422 return res;
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Georg Brandl <georg@python.org>
parents: 47301
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423 }