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1 /* |
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2 |
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3 Copyright (C) 2003 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 02110-1301, USA. |
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21 |
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22 */ |
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23 |
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24 #if !defined (octave_ls_hdf5_h) |
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25 #define octave_ls_hdf5_h 1 |
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26 |
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27 #if defined (HAVE_HDF5) |
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28 |
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29 // first, we need to define our own dummy stream subclass, since |
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30 // HDF5 needs to do its own file i/o |
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31 |
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32 // hdf5_fstreambase is used for both input and output streams, modeled |
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33 // on the fstreambase class in <fstream.h> |
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34 |
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35 class hdf5_fstreambase : virtual public std::ios |
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36 { |
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37 public: |
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38 |
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39 // HDF5 uses an "id" to refer to an open file |
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40 hid_t file_id; |
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41 |
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42 // keep track of current item index in the file |
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43 int current_item; |
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44 |
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45 hdf5_fstreambase () { file_id = -1; } |
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46 |
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47 ~hdf5_fstreambase () { close (); } |
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48 |
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49 hdf5_fstreambase (const char *name, int mode, int /* prot */ = 0) |
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50 { |
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51 if (mode & std::ios::in) |
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52 file_id = H5Fopen (name, H5F_ACC_RDONLY, H5P_DEFAULT); |
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53 else if (mode & std::ios::out) |
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54 { |
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55 if (mode & std::ios::app && H5Fis_hdf5 (name) > 0) |
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56 file_id = H5Fopen (name, H5F_ACC_RDWR, H5P_DEFAULT); |
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57 else |
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58 file_id = H5Fcreate (name, H5F_ACC_TRUNC, H5P_DEFAULT, |
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59 H5P_DEFAULT); |
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60 } |
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61 if (file_id < 0) |
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62 std::ios::setstate (std::ios::badbit); |
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63 |
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64 current_item = 0; |
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65 } |
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66 |
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67 void close () |
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68 { |
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69 if (file_id >= 0) |
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70 { |
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71 if (H5Fclose (file_id) < 0) |
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72 std::ios::setstate (std::ios::badbit); |
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73 file_id = -1; |
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74 } |
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75 } |
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76 |
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77 void open (const char *name, int mode, int) |
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78 { |
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79 clear (); |
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80 |
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81 if (mode & std::ios::in) |
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82 file_id = H5Fopen (name, H5F_ACC_RDONLY, H5P_DEFAULT); |
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83 else if (mode & std::ios::out) |
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84 { |
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85 if (mode & std::ios::app && H5Fis_hdf5 (name) > 0) |
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86 file_id = H5Fopen (name, H5F_ACC_RDWR, H5P_DEFAULT); |
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87 else |
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88 file_id = H5Fcreate (name, H5F_ACC_TRUNC, H5P_DEFAULT, |
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89 H5P_DEFAULT); |
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90 } |
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91 if (file_id < 0) |
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92 std::ios::setstate (std::ios::badbit); |
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93 |
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94 current_item = 0; |
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95 } |
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96 }; |
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97 |
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98 // input and output streams, subclassing istream and ostream |
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99 // so that we can pass them for stream parameters in the functions below. |
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100 |
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101 class hdf5_ifstream : public hdf5_fstreambase, public std::istream |
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102 { |
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103 public: |
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104 |
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105 hdf5_ifstream () : hdf5_fstreambase (), std::istream (0) { } |
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106 |
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107 hdf5_ifstream (const char *name, int mode = std::ios::in|std::ios::binary, |
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108 int prot = 0) |
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109 : hdf5_fstreambase (name, mode, prot), std::istream (0) { } |
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110 |
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111 void open (const char *name, int mode = std::ios::in|std::ios::binary, |
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112 int prot = 0) |
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113 { hdf5_fstreambase::open (name, mode, prot); } |
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114 }; |
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115 |
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116 class hdf5_ofstream : public hdf5_fstreambase, public std::ostream |
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117 { |
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118 public: |
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119 |
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120 hdf5_ofstream () : hdf5_fstreambase (), std::ostream (0) { } |
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121 |
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122 hdf5_ofstream (const char *name, int mode = std::ios::out|std::ios::binary, |
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123 int prot = 0) |
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124 : hdf5_fstreambase (name, mode, prot), std::ostream (0) { } |
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125 |
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126 void open (const char *name, int mode = std::ios::out|std::ios::binary, |
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127 int prot = 0) |
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128 { hdf5_fstreambase::open (name, mode, prot); } |
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129 }; |
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130 |
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131 // Callback data structure for passing data to hdf5_read_next_data, below. |
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132 |
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133 struct |
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134 hdf5_callback_data |
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135 { |
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136 hdf5_callback_data (void) |
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137 : name (), global (false), tc (), doc () { } |
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138 |
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139 // the following fields are set by hdf5_read_data on successful return: |
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140 |
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141 // the name of the variable |
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142 std::string name; |
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143 |
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144 // whether it is global |
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145 bool global; |
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146 |
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147 // the value of the variable, in Octave form |
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148 octave_value tc; |
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149 |
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150 // a documentation string (NULL if none) |
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151 std::string doc; |
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152 }; |
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153 |
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154 #if HAVE_HDF5_INT2FLOAT_CONVERSIONS |
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155 extern OCTINTERP_API hid_t |
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156 save_type_to_hdf5 (save_type st) |
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157 #endif |
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158 |
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159 extern OCTINTERP_API hid_t |
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160 hdf5_make_complex_type (hid_t num_type); |
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161 |
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162 extern OCTINTERP_API bool |
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163 hdf5_types_compatible (hid_t t1, hid_t t2); |
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164 |
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165 extern OCTINTERP_API herr_t |
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166 hdf5_read_next_data (hid_t group_id, const char *name, void *dv); |
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167 |
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168 extern OCTINTERP_API bool |
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169 add_hdf5_data (hid_t loc_id, const octave_value& tc, |
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170 const std::string& name, const std::string& doc, |
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171 bool mark_as_global, bool save_as_floats); |
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172 |
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173 extern OCTINTERP_API int |
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174 save_hdf5_empty (hid_t loc_id, const char *name, const dim_vector d); |
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175 |
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176 extern OCTINTERP_API int |
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177 load_hdf5_empty (hid_t loc_id, const char *name, dim_vector &d); |
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178 |
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179 extern OCTINTERP_API std::string |
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180 read_hdf5_data (std::istream& is, const std::string& filename, bool& global, |
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181 octave_value& tc, std::string& doc); |
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182 |
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183 extern OCTINTERP_API bool |
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184 save_hdf5_data (std::ostream& os, const octave_value& tc, |
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185 const std::string& name, const std::string& doc, |
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186 bool mark_as_global, bool save_as_floats); |
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187 |
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188 #ifdef IDX_TYPE_LONG |
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189 #define H5T_NATIVE_IDX H5T_NATIVE_LONG |
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190 #else |
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191 #define H5T_NATIVE_IDX H5T_NATIVE_INT |
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192 #endif |
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193 |
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194 #endif |
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195 |
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196 #endif |
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197 |
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198 /* |
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199 ;;; Local Variables: *** |
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200 ;;; mode: C++ *** |
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201 ;;; End: *** |
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202 */ |
