Mercurial > cpython-lru_cache-weakref

annotate Objects/funcobject.c @ 3216:d00a79ebb027 legacy-trunk

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Added missing imgpbm and imgsgi modules
author Jack Jansen <jack.jansen@cwi.nl>
date Thu, 12 Oct 1995 10:23:27 +0000
parents 420874f7d8bd
children 65d2d8e67da3
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1 /***********************************************************
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2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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3 The Netherlands.
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4
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5 All Rights Reserved
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6
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7 Permission to use, copy, modify, and distribute this software and its
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8 documentation for any purpose and without fee is hereby granted,
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9 provided that the above copyright notice appear in all copies and that
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10 both that copyright notice and this permission notice appear in
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11 supporting documentation, and that the names of Stichting Mathematisch
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12 Centrum or CWI not be used in advertising or publicity pertaining to
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13 distribution of the software without specific, written prior permission.
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14
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15 STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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16 THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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17 FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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18 FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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21 OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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22
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23 ******************************************************************/
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24
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25 /* Function object implementation */
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26
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27 #include "allobjects.h"
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28 #include "compile.h"
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29 #include "structmember.h"
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30
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31 object *
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32 newfuncobject(code, globals)
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33 object *code;
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34 object *globals;
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35 {
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36 funcobject *op = NEWOBJ(funcobject, &Functype);
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37 if (op != NULL) {
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38 object *doc;
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39 object *consts;
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40 INCREF(code);
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41 op->func_code = code;
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42 INCREF(globals);
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43 op->func_globals = globals;
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44 op->func_name = ((codeobject *)code)->co_name;
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45 INCREF(op->func_name);
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46 op->func_defaults = NULL; /* No default arguments */
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47 consts = ((codeobject *)code)->co_consts;
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48 if (gettuplesize(consts) >= 1) {
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49 doc = gettupleitem(consts, 0);
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50 if (!is_stringobject(doc))
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51 doc = None;
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52 }
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53 else
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54 doc = None;
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55 INCREF(doc);
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56 op->func_doc = doc;
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57 }
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58 return (object *)op;
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59 }
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60
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61 object *
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62 getfunccode(op)
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63 object *op;
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64 {
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65 if (!is_funcobject(op)) {
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66 err_badcall();
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67 return NULL;
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68 }
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69 return ((funcobject *) op) -> func_code;
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70 }
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71
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72 object *
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73 getfuncglobals(op)
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74 object *op;
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75 {
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76 if (!is_funcobject(op)) {
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77 err_badcall();
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78 return NULL;
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79 }
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80 return ((funcobject *) op) -> func_globals;
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81 }
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82
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83 object *
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84 PyFunction_GetDefaults(op)
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85 object *op;
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86 {
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87 if (!is_funcobject(op)) {
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88 err_badcall();
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89 return NULL;
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90 }
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91 return ((funcobject *) op) -> func_defaults;
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92 }
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93
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94 int
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95 PyFunction_SetDefaults(op, defaults)
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96 object *op;
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97 object *defaults;
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98 {
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99 if (!is_funcobject(op)) {
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100 err_badcall();
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101 return -1;
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102 }
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103 if (defaults == None)
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104 defaults = NULL;
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105 else if (is_tupleobject(defaults))
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106 XINCREF(defaults);
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107 else {
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108 err_setstr(SystemError, "non-tuple default args");
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109 return -1;
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110 }
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111 XDECREF(((funcobject *) op) -> func_defaults);
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112 ((funcobject *) op) -> func_defaults = defaults;
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113 return 0;
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114 }
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115
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116 /* Methods */
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117
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118 #define OFF(x) offsetof(funcobject, x)
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119
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120 static struct memberlist func_memberlist[] = {
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121 {"func_code", T_OBJECT, OFF(func_code), READONLY},
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122 {"func_globals",T_OBJECT, OFF(func_globals), READONLY},
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123 {"func_name", T_OBJECT, OFF(func_name), READONLY},
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124 {"__name__", T_OBJECT, OFF(func_name), READONLY},
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125 {"func_defaults",T_OBJECT, OFF(func_defaults), READONLY},
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126 {"func_doc", T_OBJECT, OFF(func_doc)},
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127 {"__doc__", T_OBJECT, OFF(func_doc)},
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128 {NULL} /* Sentinel */
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129 };
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130
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131 static object *
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132 func_getattr(op, name)
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133 funcobject *op;
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134 char *name;
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135 {
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136 if (name[0] != '_' && getrestricted()) {
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137 err_setstr(RuntimeError,
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138 "function attributes not accessible in restricted mode");
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139 return NULL;
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140 }
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141 return getmember((char *)op, func_memberlist, name);
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142 }
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143
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144 static void
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145 func_dealloc(op)
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146 funcobject *op;
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147 {
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148 DECREF(op->func_code);
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149 DECREF(op->func_globals);
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150 DECREF(op->func_name);
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151 XDECREF(op->func_defaults);
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152 XDECREF(op->func_doc);
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153 DEL(op);
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154 }
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155
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156 static object*
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157 func_repr(op)
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158 funcobject *op;
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159 {
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160 char buf[140];
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161 if (op->func_name == None)
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162 sprintf(buf, "<anonymous function at %lx>", (long)op);
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163 else
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164 sprintf(buf, "<function %.100s at %lx>",
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165 getstringvalue(op->func_name),
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166 (long)op);
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167 return newstringobject(buf);
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168 }
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169
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170 static int
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171 func_compare(f, g)
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172 funcobject *f, *g;
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173 {
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174 int c;
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175 if (f->func_globals != g->func_globals)
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176 return (f->func_globals < g->func_globals) ? -1 : 1;
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177 c = cmpobject(f->func_defaults, g->func_defaults);
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178 if (c != 0)
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179 return c;
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180 return cmpobject(f->func_code, g->func_code);
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181 }
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182
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183 static long
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184 func_hash(f)
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185 funcobject *f;
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186 {
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187 long h;
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188 h = hashobject(f->func_code);
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189 if (h == -1) return h;
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190 h = h ^ (long)f->func_globals;
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191 if (h == -1) h = -2;
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192 return h;
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193 }
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194
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195 typeobject Functype = {
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196 OB_HEAD_INIT(&Typetype)
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197 0,
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198 "function",
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199 sizeof(funcobject),
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200 0,
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201 (destructor)func_dealloc, /*tp_dealloc*/
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202 0, /*tp_print*/
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203 (getattrfunc)func_getattr, /*tp_getattr*/
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204 0, /*tp_setattr*/
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205 (cmpfunc)func_compare, /*tp_compare*/
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206 (reprfunc)func_repr, /*tp_repr*/
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207 0, /*tp_as_number*/
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208 0, /*tp_as_sequence*/
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209 0, /*tp_as_mapping*/
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210 (hashfunc)func_hash, /*tp_hash*/
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211 };