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1 /* glphbm.c */ |
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2 |
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3 /*********************************************************************** |
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4 * This code is part of GLPK (GNU Linear Programming Kit). |
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5 * |
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6 * Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, |
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7 * 2009, 2010 Andrew Makhorin, Department for Applied Informatics, |
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8 * Moscow Aviation Institute, Moscow, Russia. All rights reserved. |
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9 * E-mail: <mao@gnu.org>. |
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10 * |
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11 * GLPK is free software: you can redistribute it and/or modify it |
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12 * under the terms of the GNU General Public License as published by |
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13 * the Free Software Foundation, either version 3 of the License, or |
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14 * (at your option) any later version. |
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15 * |
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16 * GLPK is distributed in the hope that it will be useful, but WITHOUT |
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17 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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18 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
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19 * License for more details. |
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20 * |
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21 * You should have received a copy of the GNU General Public License |
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22 * along with GLPK. If not, see <http://www.gnu.org/licenses/>. |
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23 ***********************************************************************/ |
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24 |
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25 #define _GLPSTD_ERRNO |
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26 #define _GLPSTD_STDIO |
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27 #include "glphbm.h" |
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28 #include "glpenv.h" |
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29 |
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30 /*********************************************************************** |
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31 * NAME |
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32 * |
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33 * hbm_read_mat - read sparse matrix in Harwell-Boeing format |
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34 * |
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35 * SYNOPSIS |
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36 * |
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37 * #include "glphbm.h" |
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38 * HBM *hbm_read_mat(const char *fname); |
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39 * |
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40 * DESCRIPTION |
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41 * |
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42 * The routine hbm_read_mat reads a sparse matrix in the Harwell-Boeing |
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43 * format from a text file whose name is the character string fname. |
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44 * |
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45 * Detailed description of the Harwell-Boeing format recognised by this |
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46 * routine is given in the following report: |
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47 * |
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48 * I.S.Duff, R.G.Grimes, J.G.Lewis. User's Guide for the Harwell-Boeing |
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49 * Sparse Matrix Collection (Release I), TR/PA/92/86, October 1992. |
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50 * |
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51 * RETURNS |
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52 * |
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53 * If no error occured, the routine hbm_read_mat returns a pointer to |
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54 * a data structure containing the matrix. In case of error the routine |
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55 * prints an appropriate error message and returns NULL. */ |
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56 |
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57 struct dsa |
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58 { /* working area used by routine hbm_read_mat */ |
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59 const char *fname; |
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60 /* name of input text file */ |
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61 FILE *fp; |
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62 /* stream assigned to input text file */ |
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63 int seqn; |
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64 /* card sequential number */ |
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65 char card[80+1]; |
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66 /* card image buffer */ |
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67 int fmt_p; |
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68 /* scale factor */ |
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69 int fmt_k; |
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70 /* iterator */ |
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71 int fmt_f; |
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72 /* format code */ |
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73 int fmt_w; |
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74 /* field width */ |
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75 int fmt_d; |
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76 /* number of decimal places after point */ |
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77 }; |
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78 |
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79 /*********************************************************************** |
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80 * read_card - read next data card |
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81 * |
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82 * This routine reads the next 80-column card from the input text file |
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83 * and stores its image into the character string card. If the card was |
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84 * read successfully, the routine returns zero, otherwise non-zero. */ |
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85 |
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86 static int read_card(struct dsa *dsa) |
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87 { int k, c; |
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88 dsa->seqn++; |
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89 memset(dsa->card, ' ', 80), dsa->card[80] = '\0'; |
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90 k = 0; |
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91 for (;;) |
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92 { c = fgetc(dsa->fp); |
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93 if (ferror(dsa->fp)) |
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94 { xprintf("%s:%d: read error - %s\n", dsa->fname, dsa->seqn, |
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95 strerror(errno)); |
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96 return 1; |
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97 } |
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98 if (feof(dsa->fp)) |
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99 { if (k == 0) |
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100 xprintf("%s:%d: unexpected EOF\n", dsa->fname, |
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101 dsa->seqn); |
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102 else |
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103 xprintf("%s:%d: missing final LF\n", dsa->fname, |
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104 dsa->seqn); |
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105 return 1; |
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106 } |
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107 if (c == '\r') continue; |
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108 if (c == '\n') break; |
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109 if (iscntrl(c)) |
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110 { xprintf("%s:%d: invalid control character 0x%02X\n", |
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111 dsa->fname, dsa->seqn, c); |
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112 return 1; |
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113 } |
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114 if (k == 80) |
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115 { xprintf("%s:%d: card image too long\n", dsa->fname, |
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116 dsa->seqn); |
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117 return 1; |
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118 } |
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119 dsa->card[k++] = (char)c; |
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120 } |
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121 return 0; |
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122 } |
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123 |
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124 /*********************************************************************** |
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125 * scan_int - scan integer value from the current card |
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126 * |
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127 * This routine scans an integer value from the current card, where fld |
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128 * is the name of the field, pos is the position of the field, width is |
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129 * the width of the field, val points to a location to which the scanned |
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130 * value should be stored. If the value was scanned successfully, the |
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131 * routine returns zero, otherwise non-zero. */ |
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132 |
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133 static int scan_int(struct dsa *dsa, char *fld, int pos, int width, |
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134 int *val) |
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135 { char str[80+1]; |
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136 xassert(1 <= width && width <= 80); |
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137 memcpy(str, dsa->card + pos, width), str[width] = '\0'; |
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138 if (str2int(strspx(str), val)) |
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139 { xprintf("%s:%d: field `%s' contains invalid value `%s'\n", |
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140 dsa->fname, dsa->seqn, fld, str); |
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141 return 1; |
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142 } |
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143 return 0; |
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144 } |
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145 |
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146 /*********************************************************************** |
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147 * parse_fmt - parse Fortran format specification |
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148 * |
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149 * This routine parses the Fortran format specification represented as |
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150 * character string which fmt points to and stores format elements into |
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151 * appropriate static locations. Should note that not all valid Fortran |
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152 * format specifications may be recognised. If the format specification |
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153 * was recognised, the routine returns zero, otherwise non-zero. */ |
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154 |
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155 static int parse_fmt(struct dsa *dsa, char *fmt) |
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156 { int k, s, val; |
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157 char str[80+1]; |
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158 /* first character should be left parenthesis */ |
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159 if (fmt[0] != '(') |
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160 fail: { xprintf("hbm_read_mat: format `%s' not recognised\n", fmt); |
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161 return 1; |
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162 } |
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163 k = 1; |
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164 /* optional scale factor */ |
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165 dsa->fmt_p = 0; |
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166 if (isdigit((unsigned char)fmt[k])) |
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167 { s = 0; |
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168 while (isdigit((unsigned char)fmt[k])) |
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169 { if (s == 80) goto fail; |
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170 str[s++] = fmt[k++]; |
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171 } |
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172 str[s] = '\0'; |
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173 if (str2int(str, &val)) goto fail; |
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174 if (toupper((unsigned char)fmt[k]) != 'P') goto iter; |
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175 dsa->fmt_p = val, k++; |
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176 if (!(0 <= dsa->fmt_p && dsa->fmt_p <= 255)) goto fail; |
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177 /* optional comma may follow scale factor */ |
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178 if (fmt[k] == ',') k++; |
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179 } |
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180 /* optional iterator */ |
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181 dsa->fmt_k = 1; |
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182 if (isdigit((unsigned char)fmt[k])) |
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183 { s = 0; |
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184 while (isdigit((unsigned char)fmt[k])) |
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185 { if (s == 80) goto fail; |
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186 str[s++] = fmt[k++]; |
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187 } |
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188 str[s] = '\0'; |
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189 if (str2int(str, &val)) goto fail; |
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190 iter: dsa->fmt_k = val; |
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191 if (!(1 <= dsa->fmt_k && dsa->fmt_k <= 255)) goto fail; |
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192 } |
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193 /* format code */ |
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194 dsa->fmt_f = toupper((unsigned char)fmt[k++]); |
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195 if (!(dsa->fmt_f == 'D' || dsa->fmt_f == 'E' || |
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196 dsa->fmt_f == 'F' || dsa->fmt_f == 'G' || |
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197 dsa->fmt_f == 'I')) goto fail; |
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198 /* field width */ |
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199 if (!isdigit((unsigned char)fmt[k])) goto fail; |
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200 s = 0; |
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201 while (isdigit((unsigned char)fmt[k])) |
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202 { if (s == 80) goto fail; |
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203 str[s++] = fmt[k++]; |
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204 } |
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205 str[s] = '\0'; |
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206 if (str2int(str, &dsa->fmt_w)) goto fail; |
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207 if (!(1 <= dsa->fmt_w && dsa->fmt_w <= 255)) goto fail; |
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208 /* optional number of decimal places after point */ |
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209 dsa->fmt_d = 0; |
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210 if (fmt[k] == '.') |
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211 { k++; |
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212 if (!isdigit((unsigned char)fmt[k])) goto fail; |
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213 s = 0; |
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214 while (isdigit((unsigned char)fmt[k])) |
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215 { if (s == 80) goto fail; |
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216 str[s++] = fmt[k++]; |
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217 } |
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218 str[s] = '\0'; |
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219 if (str2int(str, &dsa->fmt_d)) goto fail; |
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220 if (!(0 <= dsa->fmt_d && dsa->fmt_d <= 255)) goto fail; |
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221 } |
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222 /* last character should be right parenthesis */ |
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223 if (!(fmt[k] == ')' && fmt[k+1] == '\0')) goto fail; |
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224 return 0; |
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225 } |
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226 |
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227 /*********************************************************************** |
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228 * read_int_array - read array of integer type |
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229 * |
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230 * This routine reads an integer array from the input text file, where |
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231 * name is array name, fmt is Fortran format specification that controls |
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232 * reading, n is number of array elements, val is array of integer type. |
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233 * If the array was read successful, the routine returns zero, otherwise |
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234 * non-zero. */ |
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235 |
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236 static int read_int_array(struct dsa *dsa, char *name, char *fmt, |
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237 int n, int val[]) |
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238 { int k, pos; |
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239 char str[80+1]; |
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240 if (parse_fmt(dsa, fmt)) return 1; |
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241 if (!(dsa->fmt_f == 'I' && dsa->fmt_w <= 80 && |
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242 dsa->fmt_k * dsa->fmt_w <= 80)) |
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243 { xprintf( |
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244 "%s:%d: can't read array `%s' - invalid format `%s'\n", |
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245 dsa->fname, dsa->seqn, name, fmt); |
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246 return 1; |
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247 } |
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248 for (k = 1, pos = INT_MAX; k <= n; k++, pos++) |
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249 { if (pos >= dsa->fmt_k) |
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250 { if (read_card(dsa)) return 1; |
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251 pos = 0; |
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252 } |
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253 memcpy(str, dsa->card + dsa->fmt_w * pos, dsa->fmt_w); |
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254 str[dsa->fmt_w] = '\0'; |
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255 strspx(str); |
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256 if (str2int(str, &val[k])) |
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257 { xprintf( |
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258 "%s:%d: can't read array `%s' - invalid value `%s'\n", |
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259 dsa->fname, dsa->seqn, name, str); |
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260 return 1; |
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261 } |
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262 } |
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263 return 0; |
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264 } |
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265 |
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266 /*********************************************************************** |
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267 * read_real_array - read array of real type |
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268 * |
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269 * This routine reads a real array from the input text file, where name |
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270 * is array name, fmt is Fortran format specification that controls |
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271 * reading, n is number of array elements, val is array of real type. |
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272 * If the array was read successful, the routine returns zero, otherwise |
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273 * non-zero. */ |
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274 |
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275 static int read_real_array(struct dsa *dsa, char *name, char *fmt, |
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276 int n, double val[]) |
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277 { int k, pos; |
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278 char str[80+1], *ptr; |
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279 if (parse_fmt(dsa, fmt)) return 1; |
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280 if (!(dsa->fmt_f != 'I' && dsa->fmt_w <= 80 && |
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281 dsa->fmt_k * dsa->fmt_w <= 80)) |
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282 { xprintf( |
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283 "%s:%d: can't read array `%s' - invalid format `%s'\n", |
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284 dsa->fname, dsa->seqn, name, fmt); |
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285 return 1; |
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286 } |
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287 for (k = 1, pos = INT_MAX; k <= n; k++, pos++) |
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288 { if (pos >= dsa->fmt_k) |
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289 { if (read_card(dsa)) return 1; |
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290 pos = 0; |
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291 } |
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292 memcpy(str, dsa->card + dsa->fmt_w * pos, dsa->fmt_w); |
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293 str[dsa->fmt_w] = '\0'; |
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294 strspx(str); |
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295 if (strchr(str, '.') == NULL && strcmp(str, "0")) |
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296 { xprintf("%s(%d): can't read array `%s' - value `%s' has no " |
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297 "decimal point\n", dsa->fname, dsa->seqn, name, str); |
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298 return 1; |
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299 } |
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300 /* sometimes lower case letters appear */ |
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301 for (ptr = str; *ptr; ptr++) |
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302 *ptr = (char)toupper((unsigned char)*ptr); |
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303 ptr = strchr(str, 'D'); |
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304 if (ptr != NULL) *ptr = 'E'; |
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305 /* value may appear with decimal exponent but without letters |
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306 E or D (for example, -123.456-012), so missing letter should |
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307 be inserted */ |
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308 ptr = strchr(str+1, '+'); |
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309 if (ptr == NULL) ptr = strchr(str+1, '-'); |
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310 if (ptr != NULL && *(ptr-1) != 'E') |
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311 { xassert(strlen(str) < 80); |
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312 memmove(ptr+1, ptr, strlen(ptr)+1); |
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313 *ptr = 'E'; |
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314 } |
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315 if (str2num(str, &val[k])) |
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316 { xprintf( |
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317 "%s:%d: can't read array `%s' - invalid value `%s'\n", |
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318 dsa->fname, dsa->seqn, name, str); |
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319 return 1; |
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320 } |
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321 } |
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322 return 0; |
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323 } |
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324 |
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325 HBM *hbm_read_mat(const char *fname) |
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326 { struct dsa _dsa, *dsa = &_dsa; |
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327 HBM *hbm = NULL; |
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328 dsa->fname = fname; |
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329 xprintf("hbm_read_mat: reading matrix from `%s'...\n", |
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330 dsa->fname); |
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331 dsa->fp = fopen(dsa->fname, "r"); |
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332 if (dsa->fp == NULL) |
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333 { xprintf("hbm_read_mat: unable to open `%s' - %s\n", |
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334 dsa->fname, strerror(errno)); |
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335 goto fail; |
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336 } |
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337 dsa->seqn = 0; |
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338 hbm = xmalloc(sizeof(HBM)); |
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339 memset(hbm, 0, sizeof(HBM)); |
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340 /* read the first heading card */ |
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341 if (read_card(dsa)) goto fail; |
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342 memcpy(hbm->title, dsa->card, 72), hbm->title[72] = '\0'; |
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343 strtrim(hbm->title); |
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344 xprintf("%s\n", hbm->title); |
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345 memcpy(hbm->key, dsa->card+72, 8), hbm->key[8] = '\0'; |
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346 strspx(hbm->key); |
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347 xprintf("key = %s\n", hbm->key); |
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348 /* read the second heading card */ |
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349 if (read_card(dsa)) goto fail; |
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350 if (scan_int(dsa, "totcrd", 0, 14, &hbm->totcrd)) goto fail; |
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351 if (scan_int(dsa, "ptrcrd", 14, 14, &hbm->ptrcrd)) goto fail; |
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352 if (scan_int(dsa, "indcrd", 28, 14, &hbm->indcrd)) goto fail; |
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353 if (scan_int(dsa, "valcrd", 42, 14, &hbm->valcrd)) goto fail; |
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354 if (scan_int(dsa, "rhscrd", 56, 14, &hbm->rhscrd)) goto fail; |
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355 xprintf("totcrd = %d; ptrcrd = %d; indcrd = %d; valcrd = %d; rhsc" |
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356 "rd = %d\n", hbm->totcrd, hbm->ptrcrd, hbm->indcrd, |
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357 hbm->valcrd, hbm->rhscrd); |
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358 /* read the third heading card */ |
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359 if (read_card(dsa)) goto fail; |
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360 memcpy(hbm->mxtype, dsa->card, 3), hbm->mxtype[3] = '\0'; |
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361 if (strchr("RCP", hbm->mxtype[0]) == NULL || |
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362 strchr("SUHZR", hbm->mxtype[1]) == NULL || |
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363 strchr("AE", hbm->mxtype[2]) == NULL) |
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364 { xprintf("%s:%d: matrix type `%s' not recognised\n", |
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365 dsa->fname, dsa->seqn, hbm->mxtype); |
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366 goto fail; |
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367 } |
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368 if (scan_int(dsa, "nrow", 14, 14, &hbm->nrow)) goto fail; |
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369 if (scan_int(dsa, "ncol", 28, 14, &hbm->ncol)) goto fail; |
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370 if (scan_int(dsa, "nnzero", 42, 14, &hbm->nnzero)) goto fail; |
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371 if (scan_int(dsa, "neltvl", 56, 14, &hbm->neltvl)) goto fail; |
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372 xprintf("mxtype = %s; nrow = %d; ncol = %d; nnzero = %d; neltvl =" |
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373 " %d\n", hbm->mxtype, hbm->nrow, hbm->ncol, hbm->nnzero, |
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374 hbm->neltvl); |
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375 /* read the fourth heading card */ |
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376 if (read_card(dsa)) goto fail; |
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377 memcpy(hbm->ptrfmt, dsa->card, 16), hbm->ptrfmt[16] = '\0'; |
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378 strspx(hbm->ptrfmt); |
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379 memcpy(hbm->indfmt, dsa->card+16, 16), hbm->indfmt[16] = '\0'; |
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380 strspx(hbm->indfmt); |
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381 memcpy(hbm->valfmt, dsa->card+32, 20), hbm->valfmt[20] = '\0'; |
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382 strspx(hbm->valfmt); |
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383 memcpy(hbm->rhsfmt, dsa->card+52, 20), hbm->rhsfmt[20] = '\0'; |
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384 strspx(hbm->rhsfmt); |
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385 xprintf("ptrfmt = %s; indfmt = %s; valfmt = %s; rhsfmt = %s\n", |
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386 hbm->ptrfmt, hbm->indfmt, hbm->valfmt, hbm->rhsfmt); |
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387 /* read the fifth heading card (optional) */ |
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388 if (hbm->rhscrd <= 0) |
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389 { strcpy(hbm->rhstyp, "???"); |
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390 hbm->nrhs = 0; |
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391 hbm->nrhsix = 0; |
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392 } |
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393 else |
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394 { if (read_card(dsa)) goto fail; |
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395 memcpy(hbm->rhstyp, dsa->card, 3), hbm->rhstyp[3] = '\0'; |
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396 if (scan_int(dsa, "nrhs", 14, 14, &hbm->nrhs)) goto fail; |
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397 if (scan_int(dsa, "nrhsix", 28, 14, &hbm->nrhsix)) goto fail; |
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398 xprintf("rhstyp = `%s'; nrhs = %d; nrhsix = %d\n", |
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399 hbm->rhstyp, hbm->nrhs, hbm->nrhsix); |
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400 } |
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401 /* read matrix structure */ |
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402 hbm->colptr = xcalloc(1+hbm->ncol+1, sizeof(int)); |
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403 if (read_int_array(dsa, "colptr", hbm->ptrfmt, hbm->ncol+1, |
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404 hbm->colptr)) goto fail; |
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405 hbm->rowind = xcalloc(1+hbm->nnzero, sizeof(int)); |
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406 if (read_int_array(dsa, "rowind", hbm->indfmt, hbm->nnzero, |
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407 hbm->rowind)) goto fail; |
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408 /* read matrix values */ |
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409 if (hbm->valcrd <= 0) goto done; |
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410 if (hbm->mxtype[2] == 'A') |
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411 { /* assembled matrix */ |
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412 hbm->values = xcalloc(1+hbm->nnzero, sizeof(double)); |
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413 if (read_real_array(dsa, "values", hbm->valfmt, hbm->nnzero, |
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414 hbm->values)) goto fail; |
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415 } |
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416 else |
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417 { /* elemental (unassembled) matrix */ |
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418 hbm->values = xcalloc(1+hbm->neltvl, sizeof(double)); |
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419 if (read_real_array(dsa, "values", hbm->valfmt, hbm->neltvl, |
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420 hbm->values)) goto fail; |
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421 } |
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422 /* read right-hand sides */ |
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423 if (hbm->nrhs <= 0) goto done; |
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424 if (hbm->rhstyp[0] == 'F') |
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425 { /* dense format */ |
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426 hbm->nrhsvl = hbm->nrow * hbm->nrhs; |
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427 hbm->rhsval = xcalloc(1+hbm->nrhsvl, sizeof(double)); |
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428 if (read_real_array(dsa, "rhsval", hbm->rhsfmt, hbm->nrhsvl, |
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429 hbm->rhsval)) goto fail; |
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430 } |
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431 else if (hbm->rhstyp[0] == 'M' && hbm->mxtype[2] == 'A') |
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432 { /* sparse format */ |
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433 /* read pointers */ |
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434 hbm->rhsptr = xcalloc(1+hbm->nrhs+1, sizeof(int)); |
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435 if (read_int_array(dsa, "rhsptr", hbm->ptrfmt, hbm->nrhs+1, |
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436 hbm->rhsptr)) goto fail; |
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437 /* read sparsity pattern */ |
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438 hbm->rhsind = xcalloc(1+hbm->nrhsix, sizeof(int)); |
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439 if (read_int_array(dsa, "rhsind", hbm->indfmt, hbm->nrhsix, |
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440 hbm->rhsind)) goto fail; |
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441 /* read values */ |
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442 hbm->rhsval = xcalloc(1+hbm->nrhsix, sizeof(double)); |
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443 if (read_real_array(dsa, "rhsval", hbm->rhsfmt, hbm->nrhsix, |
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444 hbm->rhsval)) goto fail; |
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445 } |
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446 else if (hbm->rhstyp[0] == 'M' && hbm->mxtype[2] == 'E') |
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447 { /* elemental format */ |
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448 hbm->rhsval = xcalloc(1+hbm->nrhsvl, sizeof(double)); |
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449 if (read_real_array(dsa, "rhsval", hbm->rhsfmt, hbm->nrhsvl, |
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450 hbm->rhsval)) goto fail; |
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451 } |
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452 else |
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453 { xprintf("%s:%d: right-hand side type `%c' not recognised\n", |
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454 dsa->fname, dsa->seqn, hbm->rhstyp[0]); |
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455 goto fail; |
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456 } |
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457 /* read starting guesses */ |
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458 if (hbm->rhstyp[1] == 'G') |
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459 { hbm->nguess = hbm->nrow * hbm->nrhs; |
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460 hbm->sguess = xcalloc(1+hbm->nguess, sizeof(double)); |
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461 if (read_real_array(dsa, "sguess", hbm->rhsfmt, hbm->nguess, |
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462 hbm->sguess)) goto fail; |
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463 } |
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464 /* read solution vectors */ |
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465 if (hbm->rhstyp[2] == 'X') |
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466 { hbm->nexact = hbm->nrow * hbm->nrhs; |
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467 hbm->xexact = xcalloc(1+hbm->nexact, sizeof(double)); |
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468 if (read_real_array(dsa, "xexact", hbm->rhsfmt, hbm->nexact, |
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469 hbm->xexact)) goto fail; |
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470 } |
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471 done: /* reading has been completed */ |
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472 xprintf("hbm_read_mat: %d cards were read\n", dsa->seqn); |
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473 fclose(dsa->fp); |
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474 return hbm; |
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475 fail: /* something wrong in Danish kingdom */ |
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476 if (hbm != NULL) |
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477 { if (hbm->colptr != NULL) xfree(hbm->colptr); |
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478 if (hbm->rowind != NULL) xfree(hbm->rowind); |
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479 if (hbm->rhsptr != NULL) xfree(hbm->rhsptr); |
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480 if (hbm->rhsind != NULL) xfree(hbm->rhsind); |
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481 if (hbm->values != NULL) xfree(hbm->values); |
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482 if (hbm->rhsval != NULL) xfree(hbm->rhsval); |
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483 if (hbm->sguess != NULL) xfree(hbm->sguess); |
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484 if (hbm->xexact != NULL) xfree(hbm->xexact); |
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485 xfree(hbm); |
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486 } |
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487 if (dsa->fp != NULL) fclose(dsa->fp); |
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488 return NULL; |
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489 } |
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490 |
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491 /*********************************************************************** |
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492 * NAME |
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493 * |
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494 * hbm_free_mat - free sparse matrix in Harwell-Boeing format |
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495 * |
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496 * SYNOPSIS |
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497 * |
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498 * #include "glphbm.h" |
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499 * void hbm_free_mat(HBM *hbm); |
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500 * |
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501 * DESCRIPTION |
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502 * |
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503 * The hbm_free_mat routine frees all the memory allocated to the data |
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504 * structure containing a sparse matrix in the Harwell-Boeing format. */ |
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505 |
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506 void hbm_free_mat(HBM *hbm) |
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507 { if (hbm->colptr != NULL) xfree(hbm->colptr); |
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508 if (hbm->rowind != NULL) xfree(hbm->rowind); |
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509 if (hbm->rhsptr != NULL) xfree(hbm->rhsptr); |
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510 if (hbm->rhsind != NULL) xfree(hbm->rhsind); |
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511 if (hbm->values != NULL) xfree(hbm->values); |
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512 if (hbm->rhsval != NULL) xfree(hbm->rhsval); |
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513 if (hbm->sguess != NULL) xfree(hbm->sguess); |
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514 if (hbm->xexact != NULL) xfree(hbm->xexact); |
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515 xfree(hbm); |
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516 return; |
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517 } |
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518 |
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519 /* eof */ |