1 | /* |
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2 | gcc -fPIC -c urs_ext.c -I/usr/include/python2.5 -o urs_ext.o -Wall -O |
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3 | gcc -shared urs_ext.o -o urs_ext.so |
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4 | */ |
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5 | |
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6 | #include "Python.h" |
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7 | #include "numpy/arrayobject.h" |
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8 | #include "structure.h" |
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9 | #include "math.h" |
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10 | #include <stdio.h> |
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11 | #include <float.h> |
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12 | #include <time.h> |
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13 | |
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14 | #define MAX_FILE_NAME_LENGTH 128 |
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15 | #define NODATA 99.0 |
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16 | #define EPSILON 0.00001 |
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17 | |
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18 | #define DEBUG 0 |
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19 | |
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20 | #define POFFSET 5 //Number of site_params |
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21 | |
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22 | static int *fros=NULL; // First recorded output step |
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23 | static int *lros=NULL; // Last recorded output step |
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24 | static struct tgsrwg* mytgs0=NULL; |
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25 | |
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26 | static long numDataMax=0; |
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27 | |
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28 | |
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29 | /*The MUX file format |
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30 | |
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31 | |
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32 | */ |
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33 | |
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34 | |
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35 | |
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36 | ///////////////////////////////////////////////////////////////////////// |
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37 | //Auxiliary functions |
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38 | void fillDataArray(int ista, int total_number_of_stations, int nt, int ig, int *nst, |
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39 | int *nft, float *data, int *istart_p, |
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40 | int *istop_p, float *muxData) |
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41 | { |
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42 | int it, last_it, jsta; |
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43 | long int offset=0; |
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44 | |
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45 | |
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46 | last_it = -1; |
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47 | /* Make arrays of starting and finishing time steps for the tide gauges */ |
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48 | /* and fill them from the file */ |
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49 | |
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50 | /* Update start and stop timesteps for this gauge */ |
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51 | if (nst[ista]!= -1) |
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52 | { |
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53 | if(*istart_p == -1) |
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54 | { |
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55 | *istart_p = nst[ista]; |
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56 | } |
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57 | else |
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58 | { |
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59 | *istart_p = ((nst[ista] < *istart_p) ? nst[ista] : *istart_p); |
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60 | } |
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61 | } |
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62 | |
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63 | if (nft[ista] != -1) |
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64 | { |
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65 | if (*istop_p == -1) |
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66 | { |
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67 | *istop_p = nft[ista]; |
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68 | } |
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69 | else |
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70 | { |
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71 | *istop_p = ((nft[ista] < *istop_p) ? nft[ista] : *istop_p); |
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72 | } |
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73 | } |
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74 | |
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75 | if (ig == -1 || nst[ista] == -1) /* currently ig==-1 => nst[ista]==-1 */ |
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76 | { |
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77 | /* gauge never started recording, or was outside of all grids, |
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78 | fill array with 0 */ |
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79 | for(it = 0; it < nt; it++) |
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80 | { |
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81 | data[it] = 0.0; |
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82 | } |
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83 | } |
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84 | else |
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85 | { |
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86 | for(it = 0; it < nt; it++) |
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87 | { |
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88 | last_it = it; |
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89 | /* skip t record of data block */ |
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90 | offset++; |
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91 | /* skip records from earlier tide gauges */ |
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92 | for(jsta = 0; jsta < ista; jsta++) |
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93 | if(it + 1 >= nst[jsta] && it + 1 <= nft[jsta]) |
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94 | offset++; |
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95 | |
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96 | /* deal with the tide gauge at hand */ |
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97 | if(it + 1 >= nst[ista] && it + 1 <= nft[ista]) |
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98 | { |
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99 | /* gauge is recording at this time */ |
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100 | memcpy(data + it, muxData + offset, sizeof(float)); |
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101 | |
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102 | //printf("%d: muxdata=%f\n", it, muxData[offset]); |
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103 | //printf("data[%d]=%f, offset=%d\n", it, data[it], offset); |
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104 | offset++; |
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105 | } |
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106 | else if (it + 1 < nst[ista]) |
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107 | { |
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108 | /* gauge has not yet started recording */ |
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109 | data[it] = 0.0; |
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110 | } |
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111 | else |
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112 | /* gauge has finished recording */ |
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113 | { |
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114 | data[it] = NODATA; |
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115 | break; |
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116 | } |
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117 | |
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118 | /* skip records from later tide gauges */ |
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119 | for(jsta = ista + 1; jsta < total_number_of_stations; jsta++) |
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120 | if(it + 1 >= nst[jsta] && it+1 <= nft[jsta]) |
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121 | offset++; |
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122 | } |
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123 | |
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124 | if(last_it < nt - 1) |
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125 | /* the loop was exited early because the gauge had |
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126 | finished recording */ |
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127 | for(it = last_it+1; it < nt; it++) |
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128 | data[it] = NODATA; |
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129 | } |
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130 | } |
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131 | |
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132 | |
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133 | char isdata(float x) |
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134 | { |
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135 | if(x < NODATA + EPSILON && NODATA < x + EPSILON) |
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136 | { |
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137 | return 0; |
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138 | } |
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139 | else |
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140 | { |
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141 | return 1; |
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142 | } |
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143 | } |
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144 | |
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145 | |
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146 | long getNumData(const int *fros, const int *lros, const int total_number_of_stations) |
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147 | /* calculates the number of data in the data block of a mux file */ |
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148 | /* based on the first and last recorded output steps for each gauge */ |
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149 | { |
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150 | int ista, last_output_step; |
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151 | long numData = 0; |
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152 | |
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153 | last_output_step = 0; |
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154 | for(ista = 0; ista < total_number_of_stations; ista++) |
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155 | if(*(fros + ista) != -1) |
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156 | { |
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157 | numData += *(lros + ista) - *(fros + ista) + 1; |
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158 | last_output_step = (last_output_step < *(lros+ista) ? |
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159 | *(lros+ista):last_output_step); |
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160 | } |
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161 | numData += last_output_step*total_number_of_stations; /* these are the t records */ |
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162 | return numData; |
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163 | } |
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164 | |
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165 | ///////////////////////////////////////////////////////////////////////// |
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166 | //Internal Functions |
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167 | int _read_mux2_headers(int numSrc, |
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168 | char **muxFileNameArray, |
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169 | int* total_number_of_stations, |
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170 | int* number_of_time_steps, |
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171 | double* delta_t, |
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172 | //long* numDataMax, |
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173 | int verbose) |
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174 | { |
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175 | FILE *fp; |
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176 | int numsta, i, j; |
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177 | struct tgsrwg *mytgs=0; |
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178 | char *muxFileName; |
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179 | char susMuxFileName; |
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180 | long numData; |
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181 | size_t elements_read; // fread return value |
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182 | int block_size; |
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183 | |
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184 | /* Allocate space for the names and the weights and pointers to the data*/ |
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185 | |
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186 | /* Check that the input files have mux2 extension*/ |
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187 | susMuxFileName = 0; |
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188 | for(i = 0; i < numSrc; i++) |
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189 | { |
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190 | muxFileName = muxFileNameArray[i]; |
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191 | if(!susMuxFileName && strcmp(muxFileName + strlen(muxFileName) - 4, |
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192 | "mux2") != 0) |
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193 | { |
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194 | susMuxFileName = 1; |
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195 | break; |
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196 | } |
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197 | } |
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198 | |
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199 | if(susMuxFileName) |
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200 | { |
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201 | printf("\n**************************************************************************\n"); |
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202 | printf(" WARNING: This program operates only on multiplexed files in mux2 format\n"); |
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203 | printf(" At least one input file name does not end with mux2\n"); |
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204 | printf(" Check your results carefully!\n"); |
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205 | printf("**************************************************************************\n\n"); |
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206 | } |
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207 | |
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208 | if (verbose) |
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209 | { |
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210 | printf("Reading mux header information\n"); |
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211 | } |
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212 | |
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213 | // Loop over all sources, read headers and check compatibility |
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214 | for (i = 0; i < numSrc; i++) |
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215 | { |
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216 | muxFileName = muxFileNameArray[i]; |
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217 | |
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218 | // Open the mux file |
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219 | if((fp = fopen(muxFileName, "r")) == NULL) |
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220 | { |
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221 | fprintf(stderr, "cannot open file %s\n", muxFileName); |
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222 | return -1; |
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223 | } |
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224 | |
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225 | if (!i) |
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226 | { |
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227 | elements_read = fread(total_number_of_stations, sizeof(int), 1, fp); |
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228 | if ((int) elements_read == 0 && ferror(fp)){ |
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229 | fprintf(stderr, "Error reading total number of stations\n"); |
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230 | return -2; |
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231 | } |
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232 | |
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233 | fros = (int*) malloc(*total_number_of_stations*numSrc*sizeof(int)); |
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234 | lros = (int*) malloc(*total_number_of_stations*numSrc*sizeof(int)); |
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235 | |
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236 | mytgs0 = (struct tgsrwg*) malloc(*total_number_of_stations*sizeof(struct tgsrwg)); |
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237 | mytgs = (struct tgsrwg*) malloc(*total_number_of_stations*sizeof(struct tgsrwg)); |
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238 | |
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239 | block_size = *total_number_of_stations*sizeof(struct tgsrwg); |
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240 | elements_read = fread(mytgs0, block_size , 1, fp); |
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241 | if ((int) elements_read == 0 && ferror(fp)){ |
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242 | fprintf(stderr, "Error reading mytgs0\n"); |
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243 | return -2; |
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244 | } |
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245 | } |
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246 | else |
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247 | { |
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248 | // Check that the mux files are compatible |
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249 | elements_read = fread(&numsta, sizeof(int), 1, fp); |
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250 | if ((int) elements_read == 0 && ferror(fp)){ |
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251 | fprintf(stderr, "Error reading numsta\n"); |
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252 | return -2; |
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253 | } |
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254 | |
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255 | if(numsta != *total_number_of_stations) |
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256 | { |
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257 | fprintf(stderr,"%s has different number of stations to %s\n", |
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258 | muxFileName, |
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259 | muxFileNameArray[0]); |
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260 | fclose(fp); |
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261 | return -1; |
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262 | } |
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263 | |
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264 | block_size = numsta*sizeof(struct tgsrwg); |
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265 | elements_read = fread(mytgs, block_size, 1, fp); |
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266 | if ((int) elements_read == 0 && ferror(fp)){ |
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267 | fprintf(stderr, "Error reading mgtgs\n"); |
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268 | return -2; |
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269 | } |
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270 | |
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271 | |
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272 | for (j = 0; j < numsta; j++) |
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273 | { |
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274 | if (mytgs[j].dt != mytgs0[j].dt) |
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275 | { |
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276 | fprintf(stderr, "%s has different sampling rate to %s\n", |
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277 | muxFileName, |
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278 | muxFileNameArray[0]); |
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279 | fclose(fp); |
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280 | return -1; |
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281 | } |
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282 | if (mytgs[j].nt != mytgs0[j].nt) |
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283 | { |
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284 | fprintf(stderr, "%s has different series length to %s\n", |
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285 | muxFileName, |
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286 | muxFileNameArray[0]); |
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287 | fclose(fp); |
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288 | return -1; |
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289 | } |
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290 | |
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291 | if (mytgs[j].nt != mytgs0[0].nt) |
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292 | { |
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293 | printf("Station 0 has different series length to Station %d\n", j); |
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294 | } |
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295 | } |
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296 | } |
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297 | |
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298 | /* Read the start and stop times for this source */ |
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299 | elements_read = fread(fros + i*(*total_number_of_stations), |
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300 | *total_number_of_stations*sizeof(int), 1, fp); |
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301 | if ((int) elements_read == 0 && ferror(fp)){ |
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302 | fprintf(stderr, "Error reading start times\n"); |
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303 | return -3; |
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304 | } |
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305 | |
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306 | |
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307 | elements_read = fread(lros + i*(*total_number_of_stations), |
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308 | *total_number_of_stations*sizeof(int), 1, fp); |
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309 | if ((int) elements_read == 0 && ferror(fp)){ |
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310 | fprintf(stderr, "Error reading stop times\n"); |
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311 | return -3; |
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312 | } |
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313 | |
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314 | /* Compute the size of the data block for this source */ |
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315 | numData = getNumData(fros + i*(*total_number_of_stations), |
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316 | lros + i*(*total_number_of_stations), |
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317 | (*total_number_of_stations)); |
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318 | |
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319 | /* Sanity check */ |
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320 | if (numData < 0) |
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321 | { |
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322 | fprintf(stderr,"Size of data block appears to be negative!\n"); |
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323 | return -1; |
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324 | } |
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325 | |
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326 | if (numDataMax < numData) |
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327 | { |
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328 | numDataMax = numData; |
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329 | } |
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330 | |
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331 | fclose(fp); |
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332 | } |
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333 | |
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334 | |
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335 | // Store time resolution and number of timesteps |
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336 | // These are the same for all stations as tested above, so |
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337 | // we take the first one. |
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338 | *delta_t = (double)mytgs0[0].dt; |
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339 | *number_of_time_steps = mytgs0[0].nt; |
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340 | |
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341 | free(mytgs); |
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342 | |
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343 | return 0; // Succesful execution |
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344 | } |
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345 | |
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346 | |
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347 | float** _read_mux2(int numSrc, |
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348 | char **muxFileNameArray, |
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349 | float *weights, |
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350 | double *params, |
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351 | int *number_of_stations, |
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352 | long *permutation, |
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353 | int verbose) |
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354 | { |
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355 | FILE *fp; |
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356 | int total_number_of_stations, i, isrc, ista, k; |
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357 | char *muxFileName; |
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358 | int istart=-1, istop=-1; |
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359 | int number_of_selected_stations; |
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360 | float *muxData=NULL; // Suppress warning |
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361 | long numData; |
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362 | |
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363 | int len_sts_data, error_code; |
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364 | float **sts_data; |
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365 | float *temp_sts_data; |
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366 | |
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367 | long int offset; |
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368 | |
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369 | int number_of_time_steps, N; |
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370 | double delta_t; |
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371 | |
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372 | size_t elements_read; |
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373 | |
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374 | // Shorthands pointing to memory blocks for each source |
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375 | int *fros_per_source=NULL; |
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376 | int *lros_per_source=NULL; |
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377 | |
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378 | |
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379 | error_code = _read_mux2_headers(numSrc, |
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380 | muxFileNameArray, |
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381 | &total_number_of_stations, |
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382 | &number_of_time_steps, |
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383 | &delta_t, |
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384 | verbose); |
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385 | if (error_code != 0) { |
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386 | printf("urs_ext.c: Internal function _read_mux2_headers failed: Error code = %d\n", |
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387 | error_code); |
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388 | |
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389 | return NULL; |
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390 | } |
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391 | |
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392 | |
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393 | // Apply rule that an empty permutation file means 'take all stations' |
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394 | // We could change this later by passing in None instead of the empty |
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395 | // permutation. |
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396 | number_of_selected_stations = *number_of_stations; |
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397 | if (number_of_selected_stations == 0) |
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398 | { |
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399 | number_of_selected_stations = total_number_of_stations; |
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400 | |
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401 | // Return possibly updated number of stations |
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402 | *number_of_stations = total_number_of_stations; |
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403 | |
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404 | // Create the Identity permutation vector |
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405 | permutation = (long *) malloc(number_of_selected_stations*sizeof(long)); |
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406 | for (i = 0; i < number_of_selected_stations; i++) |
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407 | { |
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408 | permutation[i] = (long) i; |
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409 | } |
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410 | } |
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411 | |
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412 | // The params array is used only for passing data back to Python. |
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413 | params[0] = (double) number_of_selected_stations; |
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414 | params[1] = (double) delta_t; |
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415 | params[2] = (double) number_of_time_steps; |
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416 | |
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417 | |
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418 | |
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419 | // Make array(s) to hold demuxed data for stations given in the |
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420 | // permutation file |
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421 | sts_data = (float**) malloc(number_of_selected_stations*sizeof(float*)); |
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422 | if (sts_data == NULL) |
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423 | { |
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424 | printf("ERROR: Memory for sts_data could not be allocated.\n"); |
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425 | return NULL; |
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426 | } |
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427 | |
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428 | // For each selected station, allocate space for its data |
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429 | len_sts_data = number_of_time_steps + POFFSET; // Max length of each timeseries? |
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430 | for (i = 0; i < number_of_selected_stations; i++) |
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431 | { |
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432 | // Initialise sts_data to zero |
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433 | sts_data[i] = (float*) calloc(len_sts_data, sizeof(float)); |
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434 | if (sts_data[i] == NULL) |
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435 | { |
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436 | printf("ERROR: Memory for sts_data could not be allocated.\n"); |
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437 | return NULL; |
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438 | } |
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439 | } |
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440 | |
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441 | temp_sts_data = (float*) calloc(len_sts_data, sizeof(float)); |
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442 | |
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443 | muxData = (float*) malloc(numDataMax*sizeof(float)); |
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444 | |
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445 | // Loop over all sources |
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446 | for (isrc = 0; isrc < numSrc; isrc++) |
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447 | { |
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448 | |
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449 | // Shorthands to local memory |
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450 | fros_per_source = (int*) fros + isrc*total_number_of_stations; |
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451 | lros_per_source = (int*) lros + isrc*total_number_of_stations; |
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452 | |
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453 | |
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454 | // Read in data block from mux2 file |
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455 | muxFileName = muxFileNameArray[isrc]; |
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456 | if((fp = fopen(muxFileName, "r")) == NULL) |
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457 | { |
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458 | fprintf(stderr, "cannot open file %s\n", muxFileName); |
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459 | return NULL; |
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460 | } |
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461 | |
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462 | if (verbose){ |
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463 | printf("Reading mux file %s\n", muxFileName); |
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464 | } |
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465 | |
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466 | offset = sizeof(int) + total_number_of_stations*(sizeof(struct tgsrwg) + 2*sizeof(int)); |
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467 | fseek(fp, offset, 0); |
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468 | |
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469 | numData = getNumData(fros_per_source, |
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470 | lros_per_source, |
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471 | total_number_of_stations); |
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472 | |
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473 | |
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474 | |
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475 | elements_read = fread(muxData, ((int) numData)*sizeof(float), 1, fp); |
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476 | if ((int) elements_read == 0 && ferror(fp)) { |
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477 | fprintf(stderr, "Error reading mux data\n"); |
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478 | return NULL; |
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479 | } |
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480 | |
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481 | fclose(fp); |
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482 | |
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483 | |
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484 | // FIXME (Ole): This is where Nariman and Ole traced the platform dependent |
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485 | // difference on 11 November 2008. We don't think the problem lies in the |
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486 | // C code. Maybe it is a problem with the MUX files written by the unit test |
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487 | // that fails on Windows but works OK on Linux. JJ's test on 17th November shows |
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488 | // that as far as Python is concerned this file should be OK on both platforms. |
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489 | |
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490 | |
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491 | |
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492 | // These printouts are enough to show the problem when compared |
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493 | // on the two platforms |
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494 | //printf("\nRead %d elements, ", (int) numData); |
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495 | //printf("muxdata[%d]=%f\n", 39, muxData[39]); |
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496 | |
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497 | |
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498 | /* |
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499 | In Windows we get |
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500 | |
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501 | Read 85 elements, muxdata[39]=0.999574 |
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502 | Read 85 elements, muxdata[39]=-0.087599 |
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503 | Read 85 elements, muxdata[39]=-0.087599 |
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504 | |
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505 | |
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506 | In Linux we get (the correct) |
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507 | |
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508 | Read 85 elements, muxdata[39]=0.999574 |
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509 | Read 85 elements, muxdata[39]=-0.087599 |
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510 | Read 85 elements, muxdata[39]=1.490349 |
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511 | */ |
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512 | |
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513 | |
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514 | |
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515 | |
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516 | |
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517 | // loop over stations present in the permutation array |
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518 | // use ista with mux data |
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519 | // use i with the processed data to be returned |
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520 | for(i = 0; i < number_of_selected_stations; i++) |
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521 | { |
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522 | |
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523 | ista = (int) permutation[i]; // Get global index into mux data |
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524 | |
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525 | // fill the data0 array from the mux file, and weight it |
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526 | fillDataArray(ista, |
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527 | total_number_of_stations, |
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528 | number_of_time_steps, |
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529 | mytgs0[ista].ig, // Grid number (if -1 fill with zeros) |
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530 | fros_per_source, |
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531 | lros_per_source, |
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532 | temp_sts_data, |
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533 | &istart, |
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534 | &istop, |
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535 | muxData); |
---|
536 | |
---|
537 | // Weight appropriately and add |
---|
538 | for(k = 0; k < mytgs0[ista].nt; k++) |
---|
539 | { |
---|
540 | if((isdata(sts_data[i][k])) && isdata(temp_sts_data[k])) |
---|
541 | { |
---|
542 | sts_data[i][k] += temp_sts_data[k] * weights[isrc]; |
---|
543 | } |
---|
544 | else |
---|
545 | { |
---|
546 | sts_data[i][k] = NODATA; |
---|
547 | } |
---|
548 | //printf("%d: temp_sts_data[%d]=%f\n", i, k, temp_sts_data[k]); |
---|
549 | |
---|
550 | } |
---|
551 | |
---|
552 | |
---|
553 | // Update metadata (e.g. start time and end time) |
---|
554 | N = number_of_time_steps; |
---|
555 | |
---|
556 | if (isrc == 0) { |
---|
557 | // Assign values for first source |
---|
558 | sts_data[i][N] = (float)mytgs0[ista].geolat; |
---|
559 | sts_data[i][N+1] = (float)mytgs0[ista].geolon; |
---|
560 | sts_data[i][N+2] = (float)mytgs0[ista].z; |
---|
561 | sts_data[i][N+3] = (float)fros_per_source[ista]; |
---|
562 | sts_data[i][N+4] = (float)lros_per_source[ista]; |
---|
563 | } else { |
---|
564 | // Update first and last timesteps for subsequent sources |
---|
565 | if (sts_data[i][N+3] > (float)fros_per_source[ista]) { |
---|
566 | if (verbose) { |
---|
567 | printf("Adjusting start time for station %d and source %d", |
---|
568 | ista, isrc); |
---|
569 | printf(" from %f to %f\n", |
---|
570 | sts_data[i][N+3], |
---|
571 | (float) fros_per_source[ista]); |
---|
572 | } |
---|
573 | sts_data[i][N+3] = (float) fros_per_source[ista]; |
---|
574 | } |
---|
575 | |
---|
576 | if (sts_data[i][N+4] < (float) lros_per_source[ista]) { |
---|
577 | if (verbose) { |
---|
578 | printf("Adjusting end time for station %d and source %d", |
---|
579 | ista, isrc); |
---|
580 | printf(" from %f to %f\n", |
---|
581 | sts_data[i][N+4], |
---|
582 | (float) lros_per_source[ista]); |
---|
583 | } |
---|
584 | sts_data[i][N+4] = (float) lros_per_source[ista]; |
---|
585 | } |
---|
586 | } |
---|
587 | } |
---|
588 | } |
---|
589 | |
---|
590 | //printf("sts_data[1,8]=%f\n", sts_data[1][8]); |
---|
591 | |
---|
592 | free(muxData); |
---|
593 | free(temp_sts_data); |
---|
594 | free(fros); |
---|
595 | free(lros); |
---|
596 | free(mytgs0); |
---|
597 | |
---|
598 | return sts_data; |
---|
599 | } |
---|
600 | |
---|
601 | ///////////////////////////////////////////////////////////////////////// |
---|
602 | //Python gateways |
---|
603 | PyObject *read_mux2(PyObject *self, PyObject *args) |
---|
604 | { |
---|
605 | /*Read in mux 2 file |
---|
606 | |
---|
607 | Python call: |
---|
608 | read_mux2(numSrc,filenames,weights,file_params,permutation,verbose) |
---|
609 | |
---|
610 | NOTE: |
---|
611 | A Python int is equivalent to a C long |
---|
612 | (this becomes really important on 64 bit architectures) |
---|
613 | |
---|
614 | A Python double corresponds to a C double |
---|
615 | */ |
---|
616 | |
---|
617 | PyObject *filenames; |
---|
618 | PyArrayObject *pyweights; |
---|
619 | PyArrayObject *file_params; |
---|
620 | PyArrayObject *permutation; // Ordering of selected stations |
---|
621 | PyArrayObject *pydata; |
---|
622 | PyObject *fname; |
---|
623 | |
---|
624 | char **muxFileNameArray; |
---|
625 | float **cdata; |
---|
626 | float *weights; |
---|
627 | int dimensions[2]; |
---|
628 | int numSrc; |
---|
629 | int verbose; |
---|
630 | int total_number_of_stations; |
---|
631 | int number_of_selected_stations; |
---|
632 | int nt; |
---|
633 | double dt; |
---|
634 | int i; |
---|
635 | int j; |
---|
636 | int start_tstep; |
---|
637 | int finish_tstep; |
---|
638 | int it; |
---|
639 | int time; |
---|
640 | int num_ts; |
---|
641 | |
---|
642 | // Convert Python arguments to C |
---|
643 | if (!PyArg_ParseTuple(args, "iOOOOi", |
---|
644 | &numSrc, &filenames, &pyweights, &file_params, |
---|
645 | &permutation, &verbose)) |
---|
646 | { |
---|
647 | PyErr_SetString(PyExc_RuntimeError, |
---|
648 | "Input arguments to read_mux2 failed"); |
---|
649 | return NULL; |
---|
650 | } |
---|
651 | |
---|
652 | if(!PyList_Check(filenames)) |
---|
653 | { |
---|
654 | PyErr_SetString(PyExc_TypeError, "get_first_elem expects a list"); |
---|
655 | return NULL; |
---|
656 | } |
---|
657 | |
---|
658 | if(PyList_Size(filenames) == 0) |
---|
659 | { |
---|
660 | PyErr_SetString(PyExc_ValueError, "empty lists not allowed"); |
---|
661 | return NULL; |
---|
662 | } |
---|
663 | |
---|
664 | if (pyweights->nd != 1 || pyweights->descr->type_num != PyArray_DOUBLE) |
---|
665 | { |
---|
666 | PyErr_SetString(PyExc_ValueError, |
---|
667 | "pyweights must be one-dimensional and of type double"); |
---|
668 | return NULL; |
---|
669 | } |
---|
670 | |
---|
671 | if(PyList_Size(filenames) != pyweights->dimensions[0]) |
---|
672 | { |
---|
673 | PyErr_SetString(PyExc_ValueError, |
---|
674 | "Must specify one weight for each filename"); |
---|
675 | return NULL; |
---|
676 | } |
---|
677 | |
---|
678 | muxFileNameArray = (char**)malloc(numSrc*sizeof(char*)); |
---|
679 | if (muxFileNameArray == NULL) |
---|
680 | { |
---|
681 | PyErr_SetString(PyExc_ValueError, |
---|
682 | "ERROR: Memory for muxFileNameArray could not be allocated."); |
---|
683 | return NULL; |
---|
684 | } |
---|
685 | |
---|
686 | for (i = 0; i < numSrc; i++) |
---|
687 | { |
---|
688 | |
---|
689 | fname = PyList_GetItem(filenames, i); |
---|
690 | if (!fname) |
---|
691 | { |
---|
692 | PyErr_SetString(PyExc_ValueError, "filename not a string"); |
---|
693 | return NULL; |
---|
694 | } |
---|
695 | |
---|
696 | muxFileNameArray[i] = PyString_AsString(fname); |
---|
697 | if (muxFileNameArray[i] == NULL) |
---|
698 | { |
---|
699 | PyErr_SetString(PyExc_ValueError, |
---|
700 | "ERROR: Memory for muxFileNameArray could not be allocated.\n"); |
---|
701 | return NULL; |
---|
702 | } |
---|
703 | } |
---|
704 | |
---|
705 | if (file_params->nd != 1 || file_params->descr->type_num != PyArray_DOUBLE) |
---|
706 | { |
---|
707 | PyErr_SetString(PyExc_ValueError, |
---|
708 | "file_params must be one-dimensional and of type double"); |
---|
709 | return NULL; |
---|
710 | } |
---|
711 | |
---|
712 | |
---|
713 | // Create array for weights which are passed to read_mux2 |
---|
714 | weights = (float*) malloc(numSrc*sizeof(float)); |
---|
715 | for (i = 0; i < numSrc; i++) |
---|
716 | { |
---|
717 | weights[i] = (float)(*(double*)(pyweights->data + i*pyweights->strides[0])); |
---|
718 | } |
---|
719 | |
---|
720 | // Desired number of stations |
---|
721 | number_of_selected_stations = (int) permutation->dimensions[0]; |
---|
722 | |
---|
723 | // Read in mux2 data from file |
---|
724 | cdata = _read_mux2(numSrc, |
---|
725 | muxFileNameArray, |
---|
726 | weights, |
---|
727 | (double*)file_params->data, |
---|
728 | &number_of_selected_stations, |
---|
729 | (long*) permutation->data, |
---|
730 | verbose); |
---|
731 | |
---|
732 | if (!cdata) |
---|
733 | { |
---|
734 | PyErr_SetString(PyExc_ValueError, "No STS_DATA returned"); |
---|
735 | return NULL; |
---|
736 | } |
---|
737 | |
---|
738 | |
---|
739 | // Allocate space for return vector |
---|
740 | total_number_of_stations = (int)*(double*)(file_params->data + 0*file_params->strides[0]); |
---|
741 | dt = *(double*)(file_params->data + 1*file_params->strides[0]); |
---|
742 | nt = (int)*(double*)(file_params->data + 2*file_params->strides[0]); |
---|
743 | |
---|
744 | |
---|
745 | // Find min and max start times of all gauges |
---|
746 | start_tstep = nt + 1; |
---|
747 | finish_tstep = -1; |
---|
748 | for (i = 0; i < number_of_selected_stations; i++) |
---|
749 | { |
---|
750 | //printf("cdata[%d] start = %f\n", i, (double) cdata[i][nt+3]); |
---|
751 | // printf("cdata[%d] finish = %f\n", i, (double) cdata[i][nt+4]); |
---|
752 | |
---|
753 | if ((int)cdata[i][nt + 3] < start_tstep) |
---|
754 | { |
---|
755 | start_tstep = (int)cdata[i][nt + 3]; |
---|
756 | } |
---|
757 | if ((int)cdata[i][nt + 4] > finish_tstep) |
---|
758 | { |
---|
759 | finish_tstep = (int)cdata[i][nt + 4]; |
---|
760 | } |
---|
761 | } |
---|
762 | |
---|
763 | if ((start_tstep > nt) | (finish_tstep < 0)) |
---|
764 | { |
---|
765 | printf("ERROR: Gauge data has incorrect start and finish times:\n"); |
---|
766 | printf(" start_tstep = %d, max_number_of_steps = %d\n", |
---|
767 | start_tstep, nt); |
---|
768 | printf(" finish_tstep = %d, min_number_of_steps = %d\n", |
---|
769 | finish_tstep, 0); |
---|
770 | |
---|
771 | PyErr_SetString(PyExc_ValueError, "Incorrect start and finish times"); |
---|
772 | return NULL; |
---|
773 | } |
---|
774 | |
---|
775 | if (start_tstep >= finish_tstep) |
---|
776 | { |
---|
777 | PyErr_SetString(PyExc_ValueError, |
---|
778 | "ERROR: Gauge data has non-postive_length"); |
---|
779 | return NULL; |
---|
780 | } |
---|
781 | |
---|
782 | num_ts = finish_tstep - start_tstep + 1; |
---|
783 | dimensions[0] = number_of_selected_stations; |
---|
784 | dimensions[1] = num_ts + POFFSET; |
---|
785 | |
---|
786 | pydata = (PyArrayObject*) PyArray_FromDims(2, dimensions, PyArray_DOUBLE); |
---|
787 | if(pydata == NULL) |
---|
788 | { |
---|
789 | PyErr_SetString(PyExc_ValueError, |
---|
790 | "ERROR: Memory for pydata array could not be allocated."); |
---|
791 | return NULL; |
---|
792 | } |
---|
793 | |
---|
794 | |
---|
795 | // Each gauge begins and ends recording at different times. When a gauge is |
---|
796 | // not recording but at least one other gauge is. |
---|
797 | // Pad the non-recording gauge array with zeros. |
---|
798 | //printf("\nData put into the cdata array from C code\n"); |
---|
799 | for (i = 0; i < number_of_selected_stations; i++) |
---|
800 | { |
---|
801 | time = 0; |
---|
802 | for (it = 0; it < finish_tstep; it++) |
---|
803 | { |
---|
804 | if ((it + 1 >= start_tstep) && (it + 1 <= finish_tstep)) |
---|
805 | { |
---|
806 | if (it + 1 > (int)cdata[i][nt + 4]) |
---|
807 | { |
---|
808 | // This gauge has stopped recording but others are |
---|
809 | // still recording |
---|
810 | *(double*)(pydata->data + i*pydata->strides[0] |
---|
811 | + time*pydata->strides[1]) = |
---|
812 | 0.0; |
---|
813 | } |
---|
814 | else |
---|
815 | { |
---|
816 | //printf("cdata[%d][%d] = %f\n", i, it, cdata[i][it]); |
---|
817 | |
---|
818 | *(double*)(pydata->data + i*pydata->strides[0] |
---|
819 | + time*pydata->strides[1]) = |
---|
820 | cdata[i][it]; |
---|
821 | } |
---|
822 | time++; |
---|
823 | } |
---|
824 | } |
---|
825 | // Pass back lat,lon,elevation |
---|
826 | for (j = 0; j < POFFSET; j++) |
---|
827 | { |
---|
828 | *(double*)(pydata->data + i*pydata->strides[0] |
---|
829 | + (num_ts + j)*pydata->strides[1]) = |
---|
830 | cdata[i][nt + j]; |
---|
831 | } |
---|
832 | } |
---|
833 | |
---|
834 | free(weights); |
---|
835 | |
---|
836 | // Free filename array, but not independent Python strings |
---|
837 | // FIXME(Ole): Do we need to update a reference counter in this case? |
---|
838 | free(muxFileNameArray); |
---|
839 | |
---|
840 | for (i = 0; i < number_of_selected_stations; ++i) |
---|
841 | { |
---|
842 | free(cdata[i]); |
---|
843 | } |
---|
844 | free(cdata); |
---|
845 | |
---|
846 | return PyArray_Return(pydata); |
---|
847 | } |
---|
848 | |
---|
849 | //------------------------------- |
---|
850 | // Method table for python module |
---|
851 | //------------------------------- |
---|
852 | static struct PyMethodDef MethodTable[] = { |
---|
853 | {"read_mux2", read_mux2, METH_VARARGS, "Print out"}, |
---|
854 | {NULL, NULL} |
---|
855 | }; |
---|
856 | |
---|
857 | // Module initialisation |
---|
858 | void initurs_ext(void){ |
---|
859 | Py_InitModule("urs_ext", MethodTable); |
---|
860 | |
---|
861 | import_array(); // Necessary for handling of NumPY structures |
---|
862 | } |
---|