1 | #include "Python.h" |
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2 | #include "numpy/arrayobject.h" |
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3 | #include "math.h" |
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4 | #include <stdio.h> |
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5 | const double pi = 3.14159265358979; |
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6 | |
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7 | |
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8 | // Shared code snippets |
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9 | #include "util_ext.h" |
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10 | |
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11 | |
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12 | |
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13 | |
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14 | |
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15 | |
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16 | |
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17 | |
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18 | //========================================================================= |
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19 | // Python Glue |
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20 | //========================================================================= |
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21 | |
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22 | PyObject *limit_minmod_ext(PyObject *self, PyObject *args) { |
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23 | |
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24 | PyObject |
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25 | *domain, |
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26 | *quantity; |
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27 | |
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28 | PyArrayObject |
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29 | *qco, |
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30 | *qvo, |
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31 | *xco, |
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32 | *xvo; |
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33 | |
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34 | double *qc, |
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35 | *qv, |
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36 | *xc, |
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37 | *xv; |
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38 | |
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39 | double a, b; |
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40 | double phi, dx0, dx1; |
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41 | int N, k, k2; |
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42 | |
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43 | |
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44 | // Convert Python arguments to C |
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45 | if (!PyArg_ParseTuple(args, "O", &quantity)) { |
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46 | PyErr_SetString(PyExc_RuntimeError, "quantity_ext.c: limit_minmod_ext could not parse input"); |
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47 | return NULL; |
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48 | } |
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49 | |
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50 | |
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51 | domain = PyObject_GetAttrString(quantity, "domain"); |
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52 | |
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53 | //printf("B = %p\n",(void*)domain); |
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54 | if (!domain) { |
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55 | printf("quantity_ext.c: Could not obtain python object"); |
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56 | fflush(stdout); |
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57 | PyErr_SetString(PyExc_RuntimeError, "quantity_ext.c: Could not obtain python object domain"); |
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58 | return NULL; |
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59 | } |
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60 | |
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61 | |
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62 | |
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63 | N = get_python_integer(quantity,"N"); |
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64 | |
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65 | qco = get_consecutive_array(quantity, "centroid_values"); |
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66 | qvo = get_consecutive_array(quantity, "vertex_values"); |
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67 | xco = get_consecutive_array(domain, "centroids"); |
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68 | xvo = get_consecutive_array(domain, "vertices"); |
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69 | |
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70 | qc = (double *) qco -> data; |
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71 | qv = (double *) qvo -> data; |
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72 | xc = (double *) xco -> data; |
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73 | xv = (double *) xvo -> data; |
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74 | |
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75 | |
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76 | for (k=0; k<N; k++) { |
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77 | k2 = 2*k; |
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78 | if (k == 0) { |
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79 | phi = (qc[1]-qc[0])/(xc[1] - xc[0]); |
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80 | } |
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81 | else if (k==N-1) { |
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82 | phi = (qc[N-1] - qc[N-2])/(xc[N-1] - xc[N-2]); |
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83 | } |
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84 | else { |
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85 | a = (qc[k]-qc[k-1])/(xc[k]-xc[k-1]); |
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86 | b = (qc[k+1]-qc[k])/(xc[k+1]-xc[k]); |
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87 | //c = (qc[K+1]-qc[k-1])/(xc[k+1]-xc[k-1]); |
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88 | |
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89 | phi = 0.0; |
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90 | if ((fabs(a) < fabs(b)) & (a*b > 0.0 )) { |
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91 | phi = a; |
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92 | } |
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93 | if ((fabs(b) < fabs(a)) & (a*b > 0.0 )) { |
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94 | phi = b; |
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95 | } |
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96 | |
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97 | } |
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98 | |
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99 | dx0 = xv[k2] - xc[k]; |
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100 | dx1 = xv[k2+1] - xc[k]; |
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101 | |
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102 | |
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103 | qv[k2] = qc[k] + phi*dx0; |
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104 | qv[k2+1] = qc[k] + phi*dx1; |
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105 | } |
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106 | |
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107 | |
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108 | Py_DECREF(qco); |
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109 | Py_DECREF(qvo); |
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110 | Py_DECREF(xco); |
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111 | Py_DECREF(xvo); |
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112 | |
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113 | // Return updated flux timestep |
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114 | return Py_BuildValue(""); |
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115 | } |
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116 | |
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117 | |
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118 | //==================================================================== |
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119 | PyObject *limit_minmod_kurganov_ext(PyObject *self, PyObject *args) { |
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120 | |
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121 | PyObject |
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122 | *domain, |
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123 | *quantity; |
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124 | |
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125 | PyArrayObject |
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126 | *qco, |
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127 | *qvo, |
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128 | *xco, |
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129 | *xvo; |
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130 | |
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131 | double *qc, |
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132 | *qv, |
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133 | *xc, |
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134 | *xv; |
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135 | |
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136 | double a, b, c; |
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137 | double phi, dx0, dx1; |
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138 | double theta; |
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139 | int N, k, k2; |
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140 | |
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141 | |
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142 | // Convert Python arguments to C |
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143 | if (!PyArg_ParseTuple(args, "O", &quantity)) { |
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144 | PyErr_SetString(PyExc_RuntimeError, "quantity_ext.c: limit_ minmod_kurganov_ext could not parse input"); |
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145 | return NULL; |
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146 | } |
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147 | |
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148 | |
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149 | domain = PyObject_GetAttrString(quantity, "domain"); |
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150 | |
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151 | //printf("B = %p\n",(void*)domain); |
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152 | if (!domain) { |
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153 | printf("quantity_ext.c: Could not obtain python object"); |
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154 | fflush(stdout); |
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155 | PyErr_SetString(PyExc_RuntimeError, "quantity_ext.c: Could not obtain python object domain"); |
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156 | return NULL; |
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157 | } |
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158 | |
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159 | |
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160 | |
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161 | N = get_python_integer(quantity,"N"); |
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162 | theta = get_python_double(quantity,"beta"); |
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163 | |
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164 | |
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165 | //printf("beta = %f",theta); |
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166 | //fflush(stdout); |
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167 | |
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168 | qco = get_consecutive_array(quantity, "centroid_values"); |
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169 | qvo = get_consecutive_array(quantity, "vertex_values"); |
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170 | xco = get_consecutive_array(domain, "centroids"); |
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171 | xvo = get_consecutive_array(domain, "vertices"); |
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172 | |
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173 | qc = (double *) qco -> data; |
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174 | qv = (double *) qvo -> data; |
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175 | xc = (double *) xco -> data; |
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176 | xv = (double *) xvo -> data; |
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177 | |
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178 | |
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179 | for (k=0; k<N; k++) { |
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180 | k2 = 2*k; |
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181 | if (k == 0) { |
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182 | phi = (qc[1]-qc[0])/(xc[1] - xc[0]); |
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183 | } |
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184 | else if (k==N-1) { |
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185 | phi = (qc[N-1] - qc[N-2])/(xc[N-1] - xc[N-2]); |
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186 | } |
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187 | else { |
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188 | a = (qc[k]-qc[k-1])/(xc[k]-xc[k-1]); |
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189 | b = (qc[k+1]-qc[k])/(xc[k+1]-xc[k]); |
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190 | c = (qc[k+1]-qc[k-1])/(xc[k+1]-xc[k-1]); |
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191 | |
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192 | phi = 0.0; |
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193 | if ((sign(a)*sign(b) > 0.0) & (sign(a)*sign(c) > 0.0 )) { |
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194 | phi = sign(a)*min(theta*min(fabs(a),fabs(b)),fabs(c)); |
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195 | } |
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196 | |
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197 | |
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198 | } |
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199 | |
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200 | dx0 = xv[k2] - xc[k]; |
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201 | dx1 = xv[k2+1] - xc[k]; |
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202 | |
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203 | |
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204 | qv[k2] = qc[k] + phi*dx0; |
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205 | qv[k2+1] = qc[k] + phi*dx1; |
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206 | } |
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207 | |
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208 | |
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209 | Py_DECREF(qco); |
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210 | Py_DECREF(qvo); |
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211 | Py_DECREF(xco); |
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212 | Py_DECREF(xvo); |
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213 | |
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214 | // Return updated flux timestep |
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215 | return Py_BuildValue(""); |
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216 | } |
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217 | |
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218 | |
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219 | //==================================================================== |
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220 | PyObject *limit_vanleer_ext(PyObject *self, PyObject *args) { |
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221 | |
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222 | PyObject |
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223 | *domain, |
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224 | *quantity; |
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225 | |
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226 | PyArrayObject |
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227 | *qco, |
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228 | *qvo, |
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229 | *xco, |
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230 | *xvo; |
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231 | |
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232 | double *qc, |
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233 | *qv, |
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234 | *xc, |
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235 | *xv; |
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236 | |
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237 | double a, b; |
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238 | double phi, dx0, dx1; |
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239 | double theta; |
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240 | int N, k, k2; |
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241 | |
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242 | |
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243 | // Convert Python arguments to C |
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244 | if (!PyArg_ParseTuple(args, "O", &quantity)) { |
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245 | PyErr_SetString(PyExc_RuntimeError, "quantity_ext.c: limit_vanleer_ext could not parse input"); |
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246 | return NULL; |
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247 | } |
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248 | |
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249 | |
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250 | domain = PyObject_GetAttrString(quantity, "domain"); |
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251 | |
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252 | //printf("B = %p\n",(void*)domain); |
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253 | if (!domain) { |
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254 | printf("quantity_ext.c: Could not obtain python object"); |
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255 | fflush(stdout); |
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256 | PyErr_SetString(PyExc_RuntimeError, "quantity_ext.c: Could not obtain python object domain"); |
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257 | return NULL; |
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258 | } |
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259 | |
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260 | |
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261 | |
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262 | N = get_python_integer(quantity,"N"); |
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263 | theta = get_python_double(quantity,"beta"); |
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264 | |
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265 | |
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266 | //printf("beta = %f",theta); |
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267 | //fflush(stdout); |
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268 | |
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269 | qco = get_consecutive_array(quantity, "centroid_values"); |
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270 | qvo = get_consecutive_array(quantity, "vertex_values"); |
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271 | xco = get_consecutive_array(domain, "centroids"); |
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272 | xvo = get_consecutive_array(domain, "vertices"); |
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273 | |
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274 | qc = (double *) qco -> data; |
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275 | qv = (double *) qvo -> data; |
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276 | xc = (double *) xco -> data; |
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277 | xv = (double *) xvo -> data; |
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278 | |
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279 | |
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280 | for (k=0; k<N; k++) { |
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281 | k2 = 2*k; |
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282 | if (k == 0) { |
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283 | phi = (qc[1]-qc[0])/(xc[1] - xc[0]); |
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284 | } |
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285 | else if (k==N-1) { |
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286 | phi = (qc[N-1] - qc[N-2])/(xc[N-1] - xc[N-2]); |
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287 | } |
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288 | else { |
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289 | a = (qc[k]-qc[k-1])/(xc[k]-xc[k-1]); |
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290 | b = (qc[k+1]-qc[k])/(xc[k+1]-xc[k]); |
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291 | //c = (qc[k+1]-qc[k-1])/(xc[k+1]-xc[k-1]); |
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292 | |
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293 | |
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294 | phi = 0.0; |
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295 | if ((fabs(a)+fabs(b)) > 1.0e-12) { |
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296 | phi = (a*fabs(b)+fabs(a)*b)/(fabs(a)+fabs(b)); |
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297 | } |
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298 | //printf("phi = %f",phi); |
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299 | //fflush(stdout); |
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300 | |
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301 | } |
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302 | |
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303 | dx0 = xv[k2] - xc[k]; |
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304 | dx1 = xv[k2+1] - xc[k]; |
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305 | |
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306 | |
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307 | qv[k2] = qc[k] + phi*dx0; |
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308 | qv[k2+1] = qc[k] + phi*dx1; |
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309 | } |
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310 | |
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311 | |
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312 | Py_DECREF(qco); |
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313 | Py_DECREF(qvo); |
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314 | Py_DECREF(xco); |
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315 | Py_DECREF(xvo); |
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316 | |
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317 | // Return updated flux timestep |
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318 | return Py_BuildValue(""); |
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319 | } |
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320 | |
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321 | |
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322 | |
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323 | |
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324 | //------------------------------- |
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325 | // Method table for python module |
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326 | //------------------------------- |
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327 | |
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328 | static struct PyMethodDef MethodTable[] = { |
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329 | {"limit_minmod_ext", limit_minmod_ext, METH_VARARGS, "Print out"}, |
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330 | {"limit_minmod_kurganov_ext", limit_minmod_kurganov_ext, METH_VARARGS, "Print out"}, |
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331 | {"limit_vanleer_ext", limit_vanleer_ext, METH_VARARGS, "Print out"}, |
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332 | {NULL, NULL} |
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333 | }; |
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334 | |
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335 | // Module initialisation |
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336 | void initquantity_ext(void){ |
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337 | Py_InitModule("quantity_ext", MethodTable); |
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338 | import_array(); |
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339 | } |
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