1 | /********************************************************** |
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2 | Pipe params class |
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3 | **********************************************************/ |
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4 | |
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5 | struct sqpipe_params { |
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6 | struct params super; |
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7 | |
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8 | double g; |
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9 | double h0; |
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10 | double bulk_modulus; |
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11 | }; |
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12 | |
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13 | // Construction |
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14 | void sqpipe_params_init(struct sqpipe_params *q); |
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15 | struct sqpipe_params* sqpipe_params_new(); |
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16 | |
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17 | // Destruction |
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18 | struct params* sqpipe_params_destroy(struct params *q); |
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19 | |
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20 | // Methods |
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21 | |
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22 | // Implementation |
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23 | void sqpipe_params_init(struct sqpipe_params *q) { |
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24 | static struct params_vtable vtable = { |
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25 | &sqpipe_params_destroy |
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26 | }; |
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27 | q->super.vtable = &vtable; |
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28 | |
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29 | ((struct params *)q)->cfl = 0.0; |
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30 | ((struct params *)q)->epsilon = 0.0; |
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31 | q->g = 0.0; |
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32 | q->h0 = 0.0; |
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33 | } |
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34 | |
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35 | struct sqpipe_params* sqpipe_params_new() { |
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36 | struct sqpipe_params *p = malloc(sizeof(struct sqpipe_params)); |
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37 | |
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38 | sqpipe_params_init(p); |
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39 | |
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40 | return p; |
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41 | } |
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42 | |
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43 | struct params* sqpipe_params_destroy(struct params *q) { |
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44 | free(q); |
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45 | q = NULL; |
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46 | |
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47 | return q; |
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48 | } |
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49 | /**********************************************************/ |
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50 | |
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51 | |
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52 | /********************************************************** |
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53 | Pipe quantity class |
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54 | This is a virtual class and should never be created. |
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55 | The inherting class needs to implement |
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56 | init, new, flux_formula0, flux_formula1, sound_speed, |
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57 | get_conserved |
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58 | **********************************************************/ |
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59 | |
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60 | struct sqpipe_quantity { |
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61 | struct quantity super; |
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62 | |
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63 | double a; |
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64 | double d; |
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65 | double w; |
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66 | double h; |
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67 | double u; |
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68 | double z; |
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69 | double b; |
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70 | double t; |
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71 | long state; |
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72 | }; |
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73 | |
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74 | // Construction |
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75 | void sqpipe_quantity_init(struct sqpipe_quantity *q); |
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76 | struct sqpipe_quantity* sqpipe_quantity_new(); |
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77 | |
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78 | // Destruction |
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79 | struct quantity* sqpipe_quantity_destroy(struct quantity *q); |
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80 | |
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81 | // Methods |
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82 | double* sqpipe_quantity_flux_formula (struct quantity *q, double normal, struct params *p, double *quantityflux); |
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83 | double sqpipe_quantity_sound_speed (struct quantity *q, struct params *p); |
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84 | double sqpipe_quantity_get_conserved (struct quantity *q, int k, double normal); |
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85 | |
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86 | // Helper methods |
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87 | double* sqpipe_quantity_free_surface_flux_formula (struct quantity *q, double normal, struct params *p, double *quantityflux); |
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88 | double* sqpipe_quantity_pressurised_flux_formula (struct quantity *q, double normal, struct params *p, double *quantityflux); |
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89 | double sqpipe_quantity_free_surface_sound_speed (struct quantity *q, struct params *p); |
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90 | double sqpipe_quantity_pressurised_sound_speed (struct quantity *q, struct params *p); |
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91 | |
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92 | // Implementation |
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93 | double* sqpipe_quantity_flux_formula (struct quantity *q, double normal, struct params *p, double *quantityflux) { |
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94 | if (((struct sqpipe_quantity *)q)->state == 0) { |
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95 | return sqpipe_quantity_free_surface_flux_formula(q, normal, p, quantityflux); |
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96 | } else { |
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97 | return sqpipe_quantity_pressurised_flux_formula(q, normal, p, quantityflux); |
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98 | } |
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99 | } |
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100 | |
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101 | double sqpipe_quantity_sound_speed (struct quantity *q, struct params *p) { |
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102 | if (((struct sqpipe_quantity *)q)->state == 0) { |
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103 | return sqpipe_quantity_free_surface_sound_speed(q, p); |
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104 | } else { |
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105 | return sqpipe_quantity_pressurised_sound_speed(q, p); |
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106 | } |
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107 | } |
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108 | |
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109 | double sqpipe_quantity_get_conserved (struct quantity *q, int k, double normal) { |
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110 | struct sqpipe_quantity *p = (struct sqpipe_quantity*) q; |
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111 | double c; |
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112 | |
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113 | switch (k) { |
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114 | case 0: |
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115 | c = p->a; |
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116 | break; |
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117 | case 1: |
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118 | // This should be normal^2 p->d and normal is +/- 1 |
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119 | c = p->d; |
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120 | break; |
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121 | default: |
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122 | c = 0; |
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123 | } |
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124 | return c; |
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125 | } |
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126 | |
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127 | |
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128 | // Flux formula taking into account the normal |
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129 | // Note u, d should be normal*u, normal*d but since normal is +/- 1 |
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130 | // (normal*u) * (normal*d) = u*d |
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131 | double* sqpipe_quantity_free_surface_flux_formula (struct quantity *q, double normal, struct params *p, double *quantityflux) { |
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132 | struct sqpipe_quantity *pq = (struct sqpipe_quantity*) q; |
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133 | struct sqpipe_params *sp = (struct sqpipe_params *) p; |
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134 | |
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135 | quantityflux[0] = (normal * pq->u) * quantity_get_conserved(q, 0, normal); |
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136 | quantityflux[1] = normal * (pq->u * quantity_get_conserved(q, 1, normal) + 0.5 * sp->g * pq->h *pq->h); |
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137 | |
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138 | return quantityflux; |
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139 | } |
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140 | |
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141 | double* sqpipe_quantity_pressurised_flux_formula (struct quantity *q, double normal, struct params *p, double *quantityflux) { |
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142 | struct sqpipe_quantity *pq = (struct sqpipe_quantity*) q; |
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143 | struct sqpipe_params *sp = (struct sqpipe_params *) p; |
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144 | |
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145 | quantityflux[0] = (normal * pq->u) * pq->a; |
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146 | quantityflux[1] = normal * (pq->u * pq->d + sp->bulk_modulus*(pq->h - pq->t) + 0.5 * sp->g * pq->t * pq->t); |
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147 | |
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148 | return quantityflux; |
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149 | } |
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150 | |
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151 | double sqpipe_quantity_free_surface_sound_speed (struct quantity *q, struct params *p) { |
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152 | struct sqpipe_quantity *sq = (struct sqpipe_quantity*) q; |
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153 | struct sqpipe_params *sp = (struct sqpipe_params*) p; |
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154 | |
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155 | return sqrt(sp->g * sq->h); |
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156 | } |
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157 | |
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158 | double sqpipe_quantity_pressurised_sound_speed (struct quantity *q, struct params *p) { |
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159 | return ((struct sqpipe_params *)p)->bulk_modulus; |
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160 | } |
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161 | |
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162 | void sqpipe_quantity_init(struct sqpipe_quantity *q) { |
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163 | static struct quantity_vtable vtable = { |
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164 | &sqpipe_quantity_flux_formula, |
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165 | &sqpipe_quantity_sound_speed, |
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166 | &sqpipe_quantity_get_conserved, |
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167 | &sqpipe_quantity_destroy |
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168 | }; |
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169 | q->super.vtable = &vtable; |
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170 | |
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171 | q->a = 0.0; |
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172 | q->d = 0.0; |
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173 | q->w = 0.0; |
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174 | q->h = 0.0; |
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175 | q->u = 0.0; |
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176 | q->z = 0.0; |
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177 | q->b = 0.0; |
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178 | q->t = 0.0; |
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179 | q->state = 0; |
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180 | } |
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181 | |
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182 | struct sqpipe_quantity* sqpipe_quantity_new() { |
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183 | struct sqpipe_quantity *p = malloc(sizeof(struct sqpipe_quantity)); |
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184 | |
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185 | return p; |
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186 | } |
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187 | |
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188 | struct quantity* sqpipe_quantity_destroy(struct quantity *q) { |
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189 | free(q); |
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190 | q = NULL; |
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191 | |
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192 | return q; |
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193 | } |
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194 | /**********************************************************/ |
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195 | |
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196 | |
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197 | /********************************************************** |
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198 | Pipe edge class |
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199 | This is a virtual class and should never be created. |
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200 | The inherting class needs to implement |
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201 | init, new, flux_function |
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202 | **********************************************************/ |
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203 | struct sqpipe_edge { |
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204 | struct edge super; |
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205 | }; |
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206 | |
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207 | // Construction |
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208 | void sqpipe_edge_init(struct sqpipe_edge *e); |
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209 | struct sqpipe_edge* sqpipe_edge_new(); |
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210 | |
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211 | // Destruction |
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212 | struct edge* sqpipe_edge_destroy(struct edge *e); |
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213 | |
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214 | // Methods |
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215 | double sqpipe_edge_extreme_sound_speeds (struct edge *e, struct params *p); |
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216 | |
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217 | // Implementation |
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218 | double sqpipe_edge_extreme_sound_speeds (struct edge *e, struct params *p) { |
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219 | double soundspeed_left, soundspeed_right, max_speed; |
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220 | struct sqpipe_quantity *qin = (struct sqpipe_quantity*) e->qin; |
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221 | struct sqpipe_quantity *qout = (struct sqpipe_quantity*) e->qout; |
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222 | |
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223 | soundspeed_left = quantity_sound_speed(e->qin, p); |
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224 | soundspeed_right = quantity_sound_speed(e->qout, p); |
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225 | |
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226 | e->smax = max(e->normal * qin->u + soundspeed_left, e->normal * qout->u + soundspeed_right); |
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227 | if (e->smax < 0.0) e->smax = 0.0; |
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228 | |
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229 | e->smin = min(e->normal * qin->u - soundspeed_left, e->normal * qout->u - soundspeed_right); |
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230 | if (e->smin > 0.0) e->smin = 0.0; |
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231 | |
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232 | if (e->smax - e->smin < p->epsilon) { |
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233 | max_speed = 0.0; |
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234 | } else { |
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235 | max_speed = max(fabs(e->smin), fabs(e->smax)); |
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236 | } |
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237 | |
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238 | return max_speed; |
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239 | } |
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240 | |
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241 | void sqpipe_edge_init(struct sqpipe_edge *e) { |
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242 | static struct edge_vtable vtable = { |
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243 | &edge_flux_function_godunov, |
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244 | &sqpipe_edge_extreme_sound_speeds, |
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245 | &sqpipe_edge_destroy |
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246 | }; |
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247 | e->super.vtable = &vtable; |
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248 | |
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249 | ((struct edge *)e)->qin = NULL; |
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250 | ((struct edge *)e)->qout = NULL; |
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251 | ((struct edge *)e)->normal = 0.0; |
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252 | ((struct edge *)e)->smax = 0.0; |
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253 | ((struct edge *)e)->smin = 0.0; |
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254 | } |
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255 | |
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256 | struct sqpipe_edge* sqpipe_edge_new() { |
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257 | struct sqpipe_edge *p = malloc(sizeof(struct sqpipe_edge)); |
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258 | |
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259 | return p; |
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260 | } |
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261 | |
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262 | struct edge* sqpipe_edge_destroy(struct edge *e) { |
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263 | e->qin = quantity_destroy(e->qin); |
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264 | e->qout = quantity_destroy(e->qout); |
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265 | |
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266 | free(e); |
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267 | e = NULL; |
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268 | |
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269 | return e; |
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270 | } |
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271 | /**********************************************************/ |
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272 | |
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273 | /********************************************************** |
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274 | Pipe cell class |
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275 | This is a virtual class and should never be created. |
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276 | The inherting class needs to implement |
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277 | init, new, flux_function, forcing_terms |
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278 | **********************************************************/ |
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279 | struct sqpipe_cell { |
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280 | struct cell super; |
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281 | |
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282 | long state; |
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283 | }; |
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284 | |
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285 | // Construction |
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286 | void sqpipe_cell_init(struct sqpipe_cell *e); |
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287 | struct sqpipe_cell* sqpipe_cell_new(); |
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288 | |
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289 | // Destruction |
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290 | struct cell* sqpipe_cell_destroy(struct cell *c); |
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291 | |
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292 | // Methods |
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293 | double sqpipe_cell_extreme_sound_speeds (struct cell *c, struct params *p); |
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294 | double* sqpipe_cell_forcing_terms (struct cell *c, struct params *p, double *cellforce); |
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295 | |
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296 | // Helper methods |
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297 | double* sqpipe_cell_free_surface_forcing_terms (struct cell *c, struct params *p, double *cellforce); |
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298 | double* sqpipe_cell_pressurised_forcing_terms (struct cell *c, struct params *p, double *cellforce); |
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299 | |
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300 | // Implementation |
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301 | double sqpipe_cell_extreme_sound_speeds (struct cell *c, struct params *p) { |
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302 | int i; |
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303 | // The compiler doesn't know c->num_edges is positive hence whether the |
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304 | // loop will run. This throws the warning: |
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305 | // âmax_speedâ may be used uninitialized in this function |
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306 | // and the same for tmp_max_speed |
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307 | // We initiallise them to avoid the warning since we know nothing could |
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308 | // possibly go wrong... |
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309 | double max_speed = 0.0, tmp_max_speed = 0.0; |
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310 | |
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311 | for (i=0; i<c->num_edges; i++) { |
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312 | tmp_max_speed = edge_extreme_sound_speeds(c->edges[i], p); |
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313 | max_speed = max(max_speed, tmp_max_speed); |
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314 | } |
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315 | |
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316 | return max_speed; |
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317 | } |
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318 | |
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319 | double* sqpipe_cell_forcing_terms (struct cell *c, struct params *p, double *cellforce) { |
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320 | if (((struct sqpipe_cell *)c)->state == 0) { |
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321 | return sqpipe_cell_free_surface_forcing_terms(c, p, cellforce); |
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322 | } else { |
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323 | return sqpipe_cell_pressurised_forcing_terms(c, p, cellforce); |
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324 | } |
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325 | } |
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326 | |
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327 | double* sqpipe_cell_free_surface_forcing_terms (struct cell *c, struct params *p, double *cellforce) { |
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328 | struct sqpipe_quantity *qin = (struct sqpipe_quantity *) c->edges[0]->qout; |
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329 | struct sqpipe_quantity *qout = (struct sqpipe_quantity *) c->edges[1]->qin; |
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330 | struct sqpipe_params *sp = (struct sqpipe_params *) p; |
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331 | |
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332 | cellforce[0] = 0.0; |
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333 | cellforce[1] = 0.5 * sp->g * (qout->h + qin->h) * (qout->z - qin->z); |
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334 | |
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335 | return cellforce; |
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336 | } |
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337 | |
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338 | double* sqpipe_cell_pressurised_forcing_terms (struct cell *c, struct params *p, double *cellforce) { |
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339 | struct sqpipe_quantity *qin = (struct sqpipe_quantity *) c->edges[0]->qout; |
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340 | struct sqpipe_quantity *qout = (struct sqpipe_quantity *) c->edges[1]->qin; |
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341 | struct sqpipe_params *sp = (struct sqpipe_params *) p; |
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342 | |
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343 | cellforce[0] = 0.0; |
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344 | cellforce[1] = sp->bulk_modulus * (sp->g * (0.5*(qout->h + qin->h) - 0.5*(qout->t + qin->t)) * (qout->b - qin->b) + sp->g * (0.5*(qout->h + qin->h) - 0.5*(qout->t + qin->t)) * 0.5*(qout->b + qin->b) * (qout->t - qin->t) * 1/(0.5*(qout->t + qin->t))); |
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345 | |
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346 | return cellforce; |
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347 | } |
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348 | |
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349 | |
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350 | void sqpipe_cell_init(struct sqpipe_cell *c) { |
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351 | static struct cell_vtable vtable = { |
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352 | &cell_flux_function_generic, |
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353 | &sqpipe_cell_extreme_sound_speeds, |
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354 | &sqpipe_cell_forcing_terms, |
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355 | &sqpipe_cell_destroy |
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356 | }; |
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357 | c->super.vtable = &vtable; |
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358 | |
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359 | // Can't set edges to NULL here since sqpipe_cell_new() has allocated memory |
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360 | // If a cell is created without using cell_new(), then edges will be an |
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361 | // unitialised pointer. |
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362 | // Can't allocate memory here since init should not allocate memory |
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363 | // The moral: Use cell_new() to create cells! |
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364 | |
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365 | c->super.num_edges = 2; |
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366 | ((struct sqpipe_cell *)c)->state = 0; |
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367 | } |
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368 | |
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369 | struct sqpipe_cell* sqpipe_cell_new() { |
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370 | struct sqpipe_cell *c = malloc(sizeof(struct sqpipe_cell)); |
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371 | |
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372 | // Allocate memory for a length 2 array of pointers to edges |
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373 | ((struct cell *)c)->edges = (struct edge **) malloc(2 * sizeof(struct sqpipe_edge *)); |
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374 | |
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375 | return c; |
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376 | } |
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377 | |
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378 | struct cell* sqpipe_cell_destroy(struct cell *c) { |
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379 | int i; |
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380 | |
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381 | for (i=0; i<c->num_edges; i++) { |
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382 | c->edges[i] = edge_destroy(c->edges[i]); |
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383 | } |
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384 | |
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385 | free(c->edges); |
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386 | c->edges = NULL; |
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387 | free(c); |
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388 | c = NULL; |
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389 | |
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390 | return c; |
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391 | } |
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392 | /**********************************************************/ |
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393 | |
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394 | |
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395 | /********************************************************** |
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396 | Pipe quantities class |
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397 | This is a virtual class and should never be created. |
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398 | The inherting class needs to implement: |
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399 | init, new, get_quantities |
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400 | **********************************************************/ |
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401 | struct sqpipe_quantities { |
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402 | struct quantities super; |
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403 | |
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404 | double *a; |
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405 | double *d; |
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406 | double *w; |
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407 | double *h; |
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408 | double *u; |
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409 | double *z; |
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410 | double *b; |
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411 | double *t; |
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412 | }; |
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413 | |
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414 | // Construction |
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415 | void sqpipe_quantities_init(struct sqpipe_quantities *q); |
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416 | struct sqpipe_quantities* sqpipe_quantities_new(); |
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417 | |
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418 | // Destruction |
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419 | struct quantities* sqpipe_quantities_destroy(struct quantities *qs); |
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420 | |
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421 | // Methods |
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422 | struct quantity* sqpipe_quantities_get_quantity(struct quantities *qs, int i, struct quantity *q); |
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423 | void sqpipe_quantities_update (struct quantities *qs, double *flux, int k); |
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424 | |
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425 | // Implementation |
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426 | struct quantity* sqpipe_quantities_get_quantity(struct quantities *qs, int i, struct quantity *q) { |
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427 | struct sqpipe_quantities *ps = (struct sqpipe_quantities *) qs; |
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428 | struct sqpipe_quantity *p = (struct sqpipe_quantity *) q; |
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429 | |
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430 | p->a = ps->a[i]; |
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431 | p->d = ps->d[i]; |
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432 | p->w = ps->w[i]; |
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433 | p->h = ps->h[i]; |
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434 | p->u = ps->u[i]; |
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435 | p->z = ps->z[i]; |
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436 | p->b = ps->b[i]; |
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437 | p->t = ps->t[i]; |
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438 | |
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439 | return q; |
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440 | } |
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441 | |
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442 | void sqpipe_quantities_update (struct quantities *qs, double *flux, int k) { |
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443 | struct sqpipe_quantities *ps = (struct sqpipe_quantities *) qs; |
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444 | ps->a[k] = flux[0]; |
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445 | ps->d[k] = flux[1]; |
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446 | } |
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447 | |
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448 | |
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449 | void sqpipe_quantities_init(struct sqpipe_quantities *q) { |
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450 | static struct quantities_vtable vtable = { |
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451 | &sqpipe_quantities_get_quantity, |
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452 | &sqpipe_quantities_update, |
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453 | &sqpipe_quantities_destroy |
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454 | }; |
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455 | q->super.vtable = &vtable; |
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456 | |
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457 | |
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458 | q->a = NULL; |
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459 | q->d = NULL; |
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460 | q->w = NULL; |
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461 | q->h = NULL; |
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462 | q->u = NULL; |
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463 | q->z = NULL; |
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464 | q->b = NULL; |
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465 | q->t = NULL; |
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466 | } |
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467 | |
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468 | struct sqpipe_quantities* sqpipe_quantities_new() { |
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469 | struct sqpipe_quantities *p = malloc(sizeof(struct sqpipe_quantities)); |
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470 | |
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471 | return p; |
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472 | } |
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473 | |
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474 | |
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475 | struct quantities* sqpipe_quantities_destroy(struct quantities *qs) { |
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476 | free(qs); |
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477 | qs = NULL; |
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478 | |
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479 | return qs; |
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480 | } |
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481 | /**********************************************************/ |
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482 | |
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483 | |
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484 | /********************************************************** |
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485 | Pipe domain class |
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486 | This is a virtual class and should never be created. |
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487 | The inheriting class needs to implement: |
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488 | init, new, compute_fluxes |
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489 | **********************************************************/ |
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490 | struct sqpipe_domain { |
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491 | struct domain super; |
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492 | long *state; |
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493 | }; |
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494 | |
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495 | // Construction |
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496 | void sqpipe_domain_init(struct sqpipe_domain *d); |
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497 | struct sqpipe_domain* sqpipe_domain_new(); |
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498 | |
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499 | // Destruction |
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500 | struct domain* sqpipe_domain_destroy(struct domain *d); |
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501 | |
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502 | // Methods |
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503 | struct cell* sqpipe_domain_get_cell(struct domain *D, int k, struct cell *c); |
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504 | |
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505 | // Implementation |
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506 | struct cell* sqpipe_domain_get_cell(struct domain *D, int k, struct cell *c) { |
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507 | struct sqpipe_cell *sc = (struct sqpipe_cell *) c; |
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508 | struct sqpipe_domain *sD = (struct sqpipe_domain *) D; |
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509 | int i, ki, n; |
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510 | long state_in, state_out, state; |
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511 | |
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512 | // First get a generic cell |
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513 | c = domain_get_cell_generic(D, k, c); |
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514 | |
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515 | // Set state |
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516 | // The state should be set to state_in for qin and state_out for qout |
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517 | // Temporarily, I set the state of the edge, aribtrarily choosing |
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518 | // pressurised for transition points |
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519 | // This will be fixed when the flux is computed at the edge rather than |
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520 | // at the quantity |
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521 | sc->state = sD->state[k]; |
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522 | for (i = 0; i<c->num_edges; i++) { |
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523 | // The inner state is that of this cell |
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524 | state_in = sc->state; |
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525 | // The outer state is that of the corresponding neighbour cell |
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526 | ki = k*(c->num_edges) + i; |
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527 | n = D->neighbours[ki]; |
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528 | state_out = sD->state[n]; |
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529 | |
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530 | // If both in and out state are the same, choose that state |
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531 | // Otherwise, choose pressurised |
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532 | if (state_in == state_out) { |
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533 | state = state_in; |
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534 | } else { |
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535 | state = 1; |
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536 | } |
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537 | ((struct sqpipe_quantity *)(c->edges[i]->qin))->state = state; |
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538 | ((struct sqpipe_quantity *)(c->edges[i]->qout))->state = state; |
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539 | } |
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540 | |
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541 | return c; |
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542 | } |
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543 | |
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544 | |
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545 | void sqpipe_domain_init(struct sqpipe_domain *d) { |
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546 | static struct domain_vtable vtable = { |
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547 | NULL, |
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548 | NULL, |
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549 | &domain_compute_fluxes_cells_generic, |
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550 | &sqpipe_domain_get_cell, |
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551 | &sqpipe_domain_destroy |
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552 | }; |
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553 | d->super.vtable = &vtable; |
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554 | |
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555 | ((struct domain *)d)->number_of_equations = 2; |
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556 | |
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557 | ((struct domain *)d)->vertex_values = NULL; |
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558 | ((struct domain *)d)->boundary_values = NULL; |
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559 | ((struct domain *)d)->explicit_update = NULL; |
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560 | ((struct domain *)d)->neighbours = NULL; |
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561 | ((struct domain *)d)->neighbour_vertices = NULL; |
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562 | ((struct domain *)d)->normals = NULL; |
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563 | ((struct domain *)d)->areas = NULL; |
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564 | ((struct domain *)d)->number_of_elements = 0; |
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565 | |
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566 | ((struct domain *)d)->timestep = 0.0; |
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567 | ((struct domain *)d)->max_speed_array = NULL; |
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568 | |
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569 | d->state = NULL; |
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570 | // Can't set params to NULL here since sqpipe_domain_new() has allocated |
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571 | // memory |
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572 | // If a domain is created without using domain_new(), then params will be an |
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573 | // unitialised pointer. |
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574 | |
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575 | // Can't allocate memory here since init should not allocate memory |
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576 | // The moral: Use domain_new() to create domains! |
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577 | } |
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578 | |
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579 | struct sqpipe_domain* sqpipe_domain_new() { |
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580 | struct sqpipe_domain *p = malloc(sizeof(struct sqpipe_domain)); |
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581 | |
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582 | ((struct domain *)p)->params = (struct params *) sqpipe_params_new(); |
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583 | |
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584 | return p; |
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585 | } |
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586 | |
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587 | |
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588 | struct domain* sqpipe_domain_destroy(struct domain *D) { |
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589 | D->vertex_values = quantities_destroy(D->vertex_values); |
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590 | D->boundary_values = quantities_destroy(D->boundary_values); |
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591 | D->explicit_update = quantities_destroy(D->explicit_update); |
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592 | D->params = params_destroy(D->params); |
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593 | free(D); |
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594 | D = NULL; |
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595 | |
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596 | return D; |
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597 | } |
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598 | /**********************************************************/ |
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599 | |
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600 | |
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