Mercurial > cpython-lru_cache-weakref

annotate Modules/mathmodule.c @ 44685:e511ccf2ffbe legacy-trunk

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Tighten the definition of a named tuple.
author Raymond Hettinger <python@rcn.com>
date Tue, 15 Jan 2008 03:07:42 +0000
parents 94eeaeeb3ce9
children 12099143724f
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1 /* Math module -- standard C math library functions, pi and e */
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2
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3 #include "Python.h"
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4 #include "longintrepr.h" /* just for SHIFT */
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5
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6 #ifndef _MSC_VER
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7 #ifndef __STDC__
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8 extern double fmod (double, double);
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9 extern double frexp (double, int *);
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10 extern double ldexp (double, int);
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11 extern double modf (double, double *);
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12 #endif /* __STDC__ */
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13 #endif /* _MSC_VER */
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14
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15 /* Call is_error when errno != 0, and where x is the result libm
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16 * returned. is_error will usually set up an exception and return
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17 * true (1), but may return false (0) without setting up an exception.
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18 */
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19 static int
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20 is_error(double x)
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21 {
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22 int result = 1; /* presumption of guilt */
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23 assert(errno); /* non-zero errno is a precondition for calling */
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24 if (errno == EDOM)
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25 PyErr_SetString(PyExc_ValueError, "math domain error");
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26
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27 else if (errno == ERANGE) {
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28 /* ANSI C generally requires libm functions to set ERANGE
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29 * on overflow, but also generally *allows* them to set
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30 * ERANGE on underflow too. There's no consistency about
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31 * the latter across platforms.
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32 * Alas, C99 never requires that errno be set.
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33 * Here we suppress the underflow errors (libm functions
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34 * should return a zero on underflow, and +- HUGE_VAL on
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35 * overflow, so testing the result for zero suffices to
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36 * distinguish the cases).
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37 */
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38 if (x)
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39 PyErr_SetString(PyExc_OverflowError,
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40 "math range error");
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41 else
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42 result = 0;
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43 }
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44 else
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45 /* Unexpected math error */
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46 PyErr_SetFromErrno(PyExc_ValueError);
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47 return result;
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48 }
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49
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50 static PyObject *
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51 math_1(PyObject *arg, double (*func) (double))
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52 {
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53 double x = PyFloat_AsDouble(arg);
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54 if (x == -1.0 && PyErr_Occurred())
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55 return NULL;
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56 errno = 0;
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57 PyFPE_START_PROTECT("in math_1", return 0)
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58 x = (*func)(x);
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59 PyFPE_END_PROTECT(x)
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60 Py_SET_ERRNO_ON_MATH_ERROR(x);
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61 if (errno && is_error(x))
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62 return NULL;
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63 else
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64 return PyFloat_FromDouble(x);
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65 }
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66
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67 static PyObject *
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68 math_2(PyObject *args, double (*func) (double, double), char *funcname)
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69 {
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70 PyObject *ox, *oy;
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71 double x, y;
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72 if (! PyArg_UnpackTuple(args, funcname, 2, 2, &ox, &oy))
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73 return NULL;
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74 x = PyFloat_AsDouble(ox);
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75 y = PyFloat_AsDouble(oy);
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76 if ((x == -1.0 || y == -1.0) && PyErr_Occurred())
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77 return NULL;
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78 errno = 0;
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79 PyFPE_START_PROTECT("in math_2", return 0)
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80 x = (*func)(x, y);
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81 PyFPE_END_PROTECT(x)
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82 Py_SET_ERRNO_ON_MATH_ERROR(x);
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83 if (errno && is_error(x))
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84 return NULL;
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85 else
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86 return PyFloat_FromDouble(x);
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87 }
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88
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89 #define FUNC1(funcname, func, docstring) \
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90 static PyObject * math_##funcname(PyObject *self, PyObject *args) { \
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91 return math_1(args, func); \
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92 }\
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93 PyDoc_STRVAR(math_##funcname##_doc, docstring);
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94
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95 #define FUNC2(funcname, func, docstring) \
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96 static PyObject * math_##funcname(PyObject *self, PyObject *args) { \
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97 return math_2(args, func, #funcname); \
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98 }\
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99 PyDoc_STRVAR(math_##funcname##_doc, docstring);
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100
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101 FUNC1(acos, acos,
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102 "acos(x)\n\nReturn the arc cosine (measured in radians) of x.")
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103 FUNC1(asin, asin,
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104 "asin(x)\n\nReturn the arc sine (measured in radians) of x.")
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105 FUNC1(atan, atan,
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106 "atan(x)\n\nReturn the arc tangent (measured in radians) of x.")
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107 FUNC2(atan2, atan2,
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108 "atan2(y, x)\n\nReturn the arc tangent (measured in radians) of y/x.\n"
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109 "Unlike atan(y/x), the signs of both x and y are considered.")
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110 FUNC1(ceil, ceil,
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111 "ceil(x)\n\nReturn the ceiling of x as a float.\n"
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112 "This is the smallest integral value >= x.")
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113 FUNC1(cos, cos,
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114 "cos(x)\n\nReturn the cosine of x (measured in radians).")
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115 FUNC1(cosh, cosh,
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116 "cosh(x)\n\nReturn the hyperbolic cosine of x.")
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117
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118 #ifdef MS_WINDOWS
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119 # define copysign _copysign
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120 # define HAVE_COPYSIGN 1
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121 #endif
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122 #ifdef HAVE_COPYSIGN
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123 FUNC2(copysign, copysign,
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124 "copysign(x,y)\n\nReturn x with the sign of y.");
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125 #endif
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126
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127 FUNC1(exp, exp,
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128 "exp(x)\n\nReturn e raised to the power of x.")
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129 FUNC1(fabs, fabs,
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130 "fabs(x)\n\nReturn the absolute value of the float x.")
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131 FUNC1(floor, floor,
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parents: 44453
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132 "floor(x)\n\nReturn the floor of x as a float.\n"
94eeaeeb3ce9 Continue rolling back pep-3141 changes that changed behavior from 2.5. This
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44453
diff changeset
133 "This is the largest integral value <= x.")
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Peter Schneider-Kamp <nowonder@nowonder.de>
parents: 15181
diff changeset
134 FUNC2(fmod, fmod,
14616
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Tim Peters <tim.peters@gmail.com>
parents: 14375
diff changeset
135 "fmod(x,y)\n\nReturn fmod(x, y), according to platform C."
284508c653c7 Fixed legit gripe from c.l.py that math.fmod docs aren't confusing enough.
Tim Peters <tim.peters@gmail.com>
parents: 14375
diff changeset
136 " x % y may differ.")
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Fred Drake <fdrake@acm.org>
parents: 13309
diff changeset
137 FUNC2(hypot, hypot,
9593
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Guido van Rossum <guido@python.org>
parents: 9588
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138 "hypot(x,y)\n\nReturn the Euclidean distance, sqrt(x*x + y*y).")
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parents: 13309
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139 FUNC2(pow, pow,
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parents: 18066
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140 "pow(x,y)\n\nReturn x**y (x to the power of y).")
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parents: 13309
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141 FUNC1(sin, sin,
19048
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Tim Peters <tim.peters@gmail.com>
parents: 18066
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142 "sin(x)\n\nReturn the sine of x (measured in radians).")
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parents: 13309
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143 FUNC1(sinh, sinh,
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parents: 9588
diff changeset
144 "sinh(x)\n\nReturn the hyperbolic sine of x.")
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Fred Drake <fdrake@acm.org>
parents: 13309
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145 FUNC1(sqrt, sqrt,
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Guido van Rossum <guido@python.org>
parents: 9588
diff changeset
146 "sqrt(x)\n\nReturn the square root of x.")
13326
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parents: 13309
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147 FUNC1(tan, tan,
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parents: 18066
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148 "tan(x)\n\nReturn the tangent of x (measured in radians).")
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parents: 13309
diff changeset
149 FUNC1(tanh, tanh,
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Guido van Rossum <guido@python.org>
parents: 9588
diff changeset
150 "tanh(x)\n\nReturn the hyperbolic tangent of x.")
6
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Guido van Rossum <guido@python.org>
parents:
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151
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Barry Warsaw <barry@python.org>
parents: 4503
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152 static PyObject *
40362
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diff changeset
153 math_frexp(PyObject *self, PyObject *arg)
407
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Guido van Rossum <guido@python.org>
parents: 320
diff changeset
154 {
9b3d557665a9 Added frexp, ldexp, modf, fmod.
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diff changeset
155 int i;
40362
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156 double x = PyFloat_AsDouble(arg);
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parents: 38491
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157 if (x == -1.0 && PyErr_Occurred())
407
9b3d557665a9 Added frexp, ldexp, modf, fmod.
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158 return NULL;
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diff changeset
159 errno = 0;
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160 x = frexp(x, &i);
31763
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Hye-Shik Chang <hyeshik@gmail.com>
parents: 30968
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161 Py_SET_ERRNO_ON_MATH_ERROR(x);
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parents: 14616
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162 if (errno && is_error(x))
09c7ac188ce2 Stop raising OverflowError on underflows reported by libm (errno==ERANGE and
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163 return NULL;
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parents: 14616
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164 else
09c7ac188ce2 Stop raising OverflowError on underflows reported by libm (errno==ERANGE and
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165 return Py_BuildValue("(di)", x, i);
407
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166 }
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167
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Martin v. Löwis <martin@v.loewis.de>
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168 PyDoc_STRVAR(math_frexp_doc,
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parents: 19048
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169 "frexp(x)\n"
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Tim Peters <tim.peters@gmail.com>
parents: 19048
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170 "\n"
b4521436e8f8 Mechanical fiddling to make this easier to work with in my editor.
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parents: 19048
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171 "Return the mantissa and exponent of x, as pair (m, e).\n"
b4521436e8f8 Mechanical fiddling to make this easier to work with in my editor.
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parents: 19048
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172 "m is a float and e is an int, such that x = m * 2.**e.\n"
23832
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Martin v. Löwis <martin@v.loewis.de>
parents: 23427
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173 "If x is 0, m and e are both 0. Else 0.5 <= abs(m) < 1.0.");
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174
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Barry Warsaw <barry@python.org>
parents: 4503
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175 static PyObject *
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parents: 13309
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176 math_ldexp(PyObject *self, PyObject *args)
407
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diff changeset
177 {
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178 double x;
cc4350b1b91f Trent Mick:
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179 int exp;
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180 if (! PyArg_ParseTuple(args, "di:ldexp", &x, &exp))
407
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diff changeset
181 return NULL;
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diff changeset
182 errno = 0;
5120
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Guido van Rossum <guido@python.org>
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183 PyFPE_START_PROTECT("ldexp", return 0)
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184 x = ldexp(x, exp);
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185 PyFPE_END_PROTECT(x)
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Hye-Shik Chang <hyeshik@gmail.com>
parents: 30968
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186 Py_SET_ERRNO_ON_MATH_ERROR(x);
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parents: 14616
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187 if (errno && is_error(x))
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188 return NULL;
407
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diff changeset
189 else
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190 return PyFloat_FromDouble(x);
407
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191 }
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diff changeset
192
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193 PyDoc_STRVAR(math_ldexp_doc,
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194 "ldexp(x, i) -> x * (2**i)");
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195
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196 static PyObject *
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197 math_modf(PyObject *self, PyObject *arg)
407
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198 {
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199 double y, x = PyFloat_AsDouble(arg);
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200 if (x == -1.0 && PyErr_Occurred())
407
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201 return NULL;
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diff changeset
202 errno = 0;
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diff changeset
203 x = modf(x, &y);
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204 Py_SET_ERRNO_ON_MATH_ERROR(x);
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parents: 14616
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205 if (errno && is_error(x))
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206 return NULL;
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diff changeset
207 else
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208 return Py_BuildValue("(dd)", x, y);
407
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diff changeset
209 }
6
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diff changeset
210
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211 PyDoc_STRVAR(math_modf_doc,
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212 "modf(x)\n"
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213 "\n"
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214 "Return the fractional and integer parts of x. Both results carry the sign\n"
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215 "of x. The integer part is returned as a real.");
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216
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217 /* A decent logarithm is easy to compute even for huge longs, but libm can't
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parents: 19712
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218 do that by itself -- loghelper can. func is log or log10, and name is
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parents: 19712
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219 "log" or "log10". Note that overflow isn't possible: a long can contain
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220 no more than INT_MAX * SHIFT bits, so has value certainly less than
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221 2**(2**64 * 2**16) == 2**2**80, and log2 of that is 2**80, which is
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parents: 19712
diff changeset
222 small enough to fit in an IEEE single. log and log10 are even smaller.
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223 */
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224
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225 static PyObject*
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226 loghelper(PyObject* arg, double (*func)(double), char *funcname)
19713
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parents: 19712
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227 {
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diff changeset
228 /* If it is long, do it ourselves. */
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229 if (PyLong_Check(arg)) {
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diff changeset
230 double x;
9433dd3c197e Return reasonable results for math.log(long) and math.log10(long) (we were
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diff changeset
231 int e;
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232 x = _PyLong_AsScaledDouble(arg, &e);
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233 if (x <= 0.0) {
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diff changeset
234 PyErr_SetString(PyExc_ValueError,
9433dd3c197e Return reasonable results for math.log(long) and math.log10(long) (we were
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diff changeset
235 "math domain error");
9433dd3c197e Return reasonable results for math.log(long) and math.log10(long) (we were
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diff changeset
236 return NULL;
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diff changeset
237 }
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diff changeset
238 /* Value is ~= x * 2**(e*SHIFT), so the log ~=
9433dd3c197e Return reasonable results for math.log(long) and math.log10(long) (we were
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parents: 19712
diff changeset
239 log(x) + log(2) * e * SHIFT.
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diff changeset
240 CAUTION: e*SHIFT may overflow using int arithmetic,
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parents: 19712
diff changeset
241 so force use of double. */
19716
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Tim Peters <tim.peters@gmail.com>
parents: 19713
diff changeset
242 x = func(x) + (e * (double)SHIFT) * func(2.0);
19713
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243 return PyFloat_FromDouble(x);
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diff changeset
244 }
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diff changeset
245
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diff changeset
246 /* Else let libm handle it by itself. */
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247 return math_1(arg, func);
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248 }
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249
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250 static PyObject *
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diff changeset
251 math_log(PyObject *self, PyObject *args)
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parents: 19712
diff changeset
252 {
26661
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diff changeset
253 PyObject *arg;
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diff changeset
254 PyObject *base = NULL;
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parents: 24471
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255 PyObject *num, *den;
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parents: 24471
diff changeset
256 PyObject *ans;
b12e326b4ea2 Apply SF patch 652930: Add optional base argument to math.log(x[, base]).
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parents: 24471
diff changeset
257
26818
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parents: 26661
diff changeset
258 if (!PyArg_UnpackTuple(args, "log", 1, 2, &arg, &base))
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259 return NULL;
b12e326b4ea2 Apply SF patch 652930: Add optional base argument to math.log(x[, base]).
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diff changeset
260
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261 num = loghelper(arg, log, "log");
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diff changeset
262 if (num == NULL || base == NULL)
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diff changeset
263 return num;
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diff changeset
264
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diff changeset
265 den = loghelper(base, log, "log");
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parents: 24471
diff changeset
266 if (den == NULL) {
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parents: 24471
diff changeset
267 Py_DECREF(num);
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diff changeset
268 return NULL;
b12e326b4ea2 Apply SF patch 652930: Add optional base argument to math.log(x[, base]).
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parents: 24471
diff changeset
269 }
b12e326b4ea2 Apply SF patch 652930: Add optional base argument to math.log(x[, base]).
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parents: 24471
diff changeset
270
b12e326b4ea2 Apply SF patch 652930: Add optional base argument to math.log(x[, base]).
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parents: 24471
diff changeset
271 ans = PyNumber_Divide(num, den);
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parents: 24471
diff changeset
272 Py_DECREF(num);
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parents: 24471
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273 Py_DECREF(den);
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274 return ans;
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parents: 19712
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275 }
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parents: 19712
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276
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Martin v. Löwis <martin@v.loewis.de>
parents: 23427
diff changeset
277 PyDoc_STRVAR(math_log_doc,
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parents: 24471
diff changeset
278 "log(x[, base]) -> the logarithm of x to the given base.\n\
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parents: 24471
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279 If the base not specified, returns the natural logarithm (base e) of x.");
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parents: 19712
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280
9433dd3c197e Return reasonable results for math.log(long) and math.log10(long) (we were
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parents: 19712
diff changeset
281 static PyObject *
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diff changeset
282 math_log10(PyObject *self, PyObject *arg)
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parents: 19712
diff changeset
283 {
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diff changeset
284 return loghelper(arg, log10, "log10");
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parents: 19712
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285 }
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parents: 19712
diff changeset
286
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parents: 23427
diff changeset
287 PyDoc_STRVAR(math_log10_doc,
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parents: 23427
diff changeset
288 "log10(x) -> the base 10 logarithm of x.");
19713
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parents: 19712
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289
44437
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diff changeset
290 static const double degToRad = Py_MATH_PI / 180.0;
968bda81e6c8 Added math.isinf() and math.isnan()
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parents: 44432
diff changeset
291 static const double radToDeg = 180.0 / Py_MATH_PI;
23427
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parents: 19758
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292
a4d675b8b53c Added degrees() and radians() to mathmodule. Closes patch 552452 and
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parents: 19758
diff changeset
293 static PyObject *
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diff changeset
294 math_degrees(PyObject *self, PyObject *arg)
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parents: 19758
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295 {
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diff changeset
296 double x = PyFloat_AsDouble(arg);
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parents: 38491
diff changeset
297 if (x == -1.0 && PyErr_Occurred())
23427
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298 return NULL;
44437
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parents: 44432
diff changeset
299 return PyFloat_FromDouble(x * radToDeg);
23427
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Raymond Hettinger <python@rcn.com>
parents: 19758
diff changeset
300 }
a4d675b8b53c Added degrees() and radians() to mathmodule. Closes patch 552452 and
Raymond Hettinger <python@rcn.com>
parents: 19758
diff changeset
301
23832
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diff changeset
302 PyDoc_STRVAR(math_degrees_doc,
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parents: 23427
diff changeset
303 "degrees(x) -> converts angle x from radians to degrees");
23427
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parents: 19758
diff changeset
304
a4d675b8b53c Added degrees() and radians() to mathmodule. Closes patch 552452 and
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parents: 19758
diff changeset
305 static PyObject *
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diff changeset
306 math_radians(PyObject *self, PyObject *arg)
23427
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parents: 19758
diff changeset
307 {
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parents: 38491
diff changeset
308 double x = PyFloat_AsDouble(arg);
271133981e63 Speed up function calls into the math module by using METH_O.
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parents: 38491
diff changeset
309 if (x == -1.0 && PyErr_Occurred())
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diff changeset
310 return NULL;
a4d675b8b53c Added degrees() and radians() to mathmodule. Closes patch 552452 and
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parents: 19758
diff changeset
311 return PyFloat_FromDouble(x * degToRad);
a4d675b8b53c Added degrees() and radians() to mathmodule. Closes patch 552452 and
Raymond Hettinger <python@rcn.com>
parents: 19758
diff changeset
312 }
a4d675b8b53c Added degrees() and radians() to mathmodule. Closes patch 552452 and
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parents: 19758
diff changeset
313
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parents: 23427
diff changeset
314 PyDoc_STRVAR(math_radians_doc,
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parents: 23427
diff changeset
315 "radians(x) -> converts angle x from degrees to radians");
19713
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Tim Peters <tim.peters@gmail.com>
parents: 19712
diff changeset
316
44437
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Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
317 static PyObject *
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
318 math_isnan(PyObject *self, PyObject *arg)
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
319 {
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
320 double x = PyFloat_AsDouble(arg);
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
321 if (x == -1.0 && PyErr_Occurred())
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
322 return NULL;
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
323 return PyBool_FromLong((long)Py_IS_NAN(x));
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
324 }
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
325
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
326 PyDoc_STRVAR(math_isnan_doc,
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
327 "isnan(x) -> bool\n\
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
328 Checks if float x is not a number (NaN)");
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
329
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
330 static PyObject *
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
331 math_isinf(PyObject *self, PyObject *arg)
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
332 {
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
333 double x = PyFloat_AsDouble(arg);
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
334 if (x == -1.0 && PyErr_Occurred())
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
335 return NULL;
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
336 return PyBool_FromLong((long)Py_IS_INFINITY(x));
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
337 }
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
338
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
339 PyDoc_STRVAR(math_isinf_doc,
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
340 "isinf(x) -> bool\n\
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
341 Checks if float x is infinite (positive or negative)");
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
342
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
343
4635
49745ddb4f69 Renamed
Barry Warsaw <barry@python.org>
parents: 4503
diff changeset
344 static PyMethodDef math_methods[] = {
40362
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Neal Norwitz <nnorwitz@gmail.com>
parents: 38491
diff changeset
345 {"acos", math_acos, METH_O, math_acos_doc},
271133981e63 Speed up function calls into the math module by using METH_O.
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parents: 38491
diff changeset
346 {"asin", math_asin, METH_O, math_asin_doc},
271133981e63 Speed up function calls into the math module by using METH_O.
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parents: 38491
diff changeset
347 {"atan", math_atan, METH_O, math_atan_doc},
13326
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Fred Drake <fdrake@acm.org>
parents: 13309
diff changeset
348 {"atan2", math_atan2, METH_VARARGS, math_atan2_doc},
40362
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parents: 38491
diff changeset
349 {"ceil", math_ceil, METH_O, math_ceil_doc},
44453
cba9ff760430 Fixed math.copysign() on Windows
Christian Heimes <christian@cheimes.de>
parents: 44440
diff changeset
350 #ifdef HAVE_COPYSIGN
44440
6208b17d0dbe Added copysign(x, y) function to the math module
Christian Heimes <christian@cheimes.de>
parents: 44437
diff changeset
351 {"copysign", math_copysign, METH_VARARGS, math_copysign_doc},
6208b17d0dbe Added copysign(x, y) function to the math module
Christian Heimes <christian@cheimes.de>
parents: 44437
diff changeset
352 #endif
40362
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diff changeset
353 {"cos", math_cos, METH_O, math_cos_doc},
271133981e63 Speed up function calls into the math module by using METH_O.
Neal Norwitz <nnorwitz@gmail.com>
parents: 38491
diff changeset
354 {"cosh", math_cosh, METH_O, math_cosh_doc},
271133981e63 Speed up function calls into the math module by using METH_O.
Neal Norwitz <nnorwitz@gmail.com>
parents: 38491
diff changeset
355 {"degrees", math_degrees, METH_O, math_degrees_doc},
271133981e63 Speed up function calls into the math module by using METH_O.
Neal Norwitz <nnorwitz@gmail.com>
parents: 38491
diff changeset
356 {"exp", math_exp, METH_O, math_exp_doc},
271133981e63 Speed up function calls into the math module by using METH_O.
Neal Norwitz <nnorwitz@gmail.com>
parents: 38491
diff changeset
357 {"fabs", math_fabs, METH_O, math_fabs_doc},
271133981e63 Speed up function calls into the math module by using METH_O.
Neal Norwitz <nnorwitz@gmail.com>
parents: 38491
diff changeset
358 {"floor", math_floor, METH_O, math_floor_doc},
13326
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Fred Drake <fdrake@acm.org>
parents: 13309
diff changeset
359 {"fmod", math_fmod, METH_VARARGS, math_fmod_doc},
40362
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parents: 38491
diff changeset
360 {"frexp", math_frexp, METH_O, math_frexp_doc},
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Fred Drake <fdrake@acm.org>
parents: 13309
diff changeset
361 {"hypot", math_hypot, METH_VARARGS, math_hypot_doc},
44437
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
362 {"isinf", math_isinf, METH_O, math_isinf_doc},
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
363 {"isnan", math_isnan, METH_O, math_isnan_doc},
13326
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Fred Drake <fdrake@acm.org>
parents: 13309
diff changeset
364 {"ldexp", math_ldexp, METH_VARARGS, math_ldexp_doc},
24717405dd89 ANSI-fication, remove Py_PROTO, etc.
Fred Drake <fdrake@acm.org>
parents: 13309
diff changeset
365 {"log", math_log, METH_VARARGS, math_log_doc},
40362
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Neal Norwitz <nnorwitz@gmail.com>
parents: 38491
diff changeset
366 {"log10", math_log10, METH_O, math_log10_doc},
271133981e63 Speed up function calls into the math module by using METH_O.
Neal Norwitz <nnorwitz@gmail.com>
parents: 38491
diff changeset
367 {"modf", math_modf, METH_O, math_modf_doc},
13326
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parents: 13309
diff changeset
368 {"pow", math_pow, METH_VARARGS, math_pow_doc},
40362
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Neal Norwitz <nnorwitz@gmail.com>
parents: 38491
diff changeset
369 {"radians", math_radians, METH_O, math_radians_doc},
271133981e63 Speed up function calls into the math module by using METH_O.
Neal Norwitz <nnorwitz@gmail.com>
parents: 38491
diff changeset
370 {"sin", math_sin, METH_O, math_sin_doc},
271133981e63 Speed up function calls into the math module by using METH_O.
Neal Norwitz <nnorwitz@gmail.com>
parents: 38491
diff changeset
371 {"sinh", math_sinh, METH_O, math_sinh_doc},
271133981e63 Speed up function calls into the math module by using METH_O.
Neal Norwitz <nnorwitz@gmail.com>
parents: 38491
diff changeset
372 {"sqrt", math_sqrt, METH_O, math_sqrt_doc},
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parents: 38491
diff changeset
373 {"tan", math_tan, METH_O, math_tan_doc},
271133981e63 Speed up function calls into the math module by using METH_O.
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parents: 38491
diff changeset
374 {"tanh", math_tanh, METH_O, math_tanh_doc},
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
375 {NULL, NULL} /* sentinel */
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
376 };
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
377
9593
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Guido van Rossum <guido@python.org>
parents: 9588
diff changeset
378
23832
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Martin v. Löwis <martin@v.loewis.de>
parents: 23427
diff changeset
379 PyDoc_STRVAR(module_doc,
19712
b4521436e8f8 Mechanical fiddling to make this easier to work with in my editor.
Tim Peters <tim.peters@gmail.com>
parents: 19048
diff changeset
380 "This module is always available. It provides access to the\n"
23832
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Martin v. Löwis <martin@v.loewis.de>
parents: 23427
diff changeset
381 "mathematical functions defined by the C standard.");
9593
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Guido van Rossum <guido@python.org>
parents: 9588
diff changeset
382
24471
f66b3a3509c7 Excise DL_EXPORT/DL_IMPORT from Modules/*. Required adding a prototype
Mark Hammond <mhammond@skippinet.com.au>
parents: 23832
diff changeset
383 PyMODINIT_FUNC
13651
8a063423e0b7 Bunch of minor ANSIfications: 'void initfunc()' -> 'void initfunc(void)',
Thomas Wouters <thomas@python.org>
parents: 13331
diff changeset
384 initmath(void)
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
385 {
4635
49745ddb4f69 Renamed
Barry Warsaw <barry@python.org>
parents: 4503
diff changeset
386 PyObject *m, *d, *v;
19048
e282d6b2b758 Part of SF patch [#431848] mathmodule.c: doc strings & conversion, from
Tim Peters <tim.peters@gmail.com>
parents: 18066
diff changeset
387
9593
f22f769bf3d9 Added Doc strings -- by Chris Petrilli.
Guido van Rossum <guido@python.org>
parents: 9588
diff changeset
388 m = Py_InitModule3("math", math_methods, module_doc);
36324
1af7f719ed28 Check return result from Py_InitModule*(). This API can fail.
Neal Norwitz <nnorwitz@gmail.com>
parents: 34872
diff changeset
389 if (m == NULL)
1af7f719ed28 Check return result from Py_InitModule*(). This API can fail.
Neal Norwitz <nnorwitz@gmail.com>
parents: 34872
diff changeset
390 goto finally;
4635
49745ddb4f69 Renamed
Barry Warsaw <barry@python.org>
parents: 4503
diff changeset
391 d = PyModule_GetDict(m);
40362
271133981e63 Speed up function calls into the math module by using METH_O.
Neal Norwitz <nnorwitz@gmail.com>
parents: 38491
diff changeset
392 if (d == NULL)
271133981e63 Speed up function calls into the math module by using METH_O.
Neal Norwitz <nnorwitz@gmail.com>
parents: 38491
diff changeset
393 goto finally;
4752
7367fb107108 Better error checking in initmath().
Barry Warsaw <barry@python.org>
parents: 4635
diff changeset
394
44437
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
395 if (!(v = PyFloat_FromDouble(Py_MATH_PI)))
4752
7367fb107108 Better error checking in initmath().
Barry Warsaw <barry@python.org>
parents: 4635
diff changeset
396 goto finally;
7367fb107108 Better error checking in initmath().
Barry Warsaw <barry@python.org>
parents: 4635
diff changeset
397 if (PyDict_SetItemString(d, "pi", v) < 0)
7367fb107108 Better error checking in initmath().
Barry Warsaw <barry@python.org>
parents: 4635
diff changeset
398 goto finally;
4635
49745ddb4f69 Renamed
Barry Warsaw <barry@python.org>
parents: 4503
diff changeset
399 Py_DECREF(v);
4752
7367fb107108 Better error checking in initmath().
Barry Warsaw <barry@python.org>
parents: 4635
diff changeset
400
44437
968bda81e6c8 Added math.isinf() and math.isnan()
Christian Heimes <christian@cheimes.de>
parents: 44432
diff changeset
401 if (!(v = PyFloat_FromDouble(Py_MATH_E)))
4752
7367fb107108 Better error checking in initmath().
Barry Warsaw <barry@python.org>
parents: 4635
diff changeset
402 goto finally;
4765
f8b36c0ec114 Correct 1-char typo / syntax error.
Guido van Rossum <guido@python.org>
parents: 4752
diff changeset
403 if (PyDict_SetItemString(d, "e", v) < 0)
4752
7367fb107108 Better error checking in initmath().
Barry Warsaw <barry@python.org>
parents: 4635
diff changeset
404 goto finally;
4635
49745ddb4f69 Renamed
Barry Warsaw <barry@python.org>
parents: 4503
diff changeset
405 Py_DECREF(v);
4752
7367fb107108 Better error checking in initmath().
Barry Warsaw <barry@python.org>
parents: 4635
diff changeset
406
7367fb107108 Better error checking in initmath().
Barry Warsaw <barry@python.org>
parents: 4635
diff changeset
407 finally:
14346
5397fdf88ec2 Do the absolute minimal amount of modifications to eradicate
Barry Warsaw <barry@python.org>
parents: 13912
diff changeset
408 return;
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
409 }