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1 /* |
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2 |
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3 Copyright (C) 2003, 2004, 2005, 2006, 2007 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 3 of the License, or (at your |
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10 option) any 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, see |
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19 <http://www.gnu.org/licenses/>. |
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20 |
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21 */ |
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22 |
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23 #if !defined (octave_ls_hdf5_h) |
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24 #define octave_ls_hdf5_h 1 |
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25 |
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26 #if defined (HAVE_HDF5) |
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27 |
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28 // first, we need to define our own dummy stream subclass, since |
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29 // HDF5 needs to do its own file i/o |
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30 |
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31 // hdf5_fstreambase is used for both input and output streams, modeled |
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32 // on the fstreambase class in <fstream.h> |
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33 |
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34 class hdf5_fstreambase : virtual public std::ios |
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35 { |
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36 public: |
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37 |
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38 // HDF5 uses an "id" to refer to an open file |
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39 hid_t file_id; |
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40 |
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41 // keep track of current item index in the file |
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42 int current_item; |
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43 |
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44 hdf5_fstreambase () { file_id = -1; } |
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45 |
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46 ~hdf5_fstreambase () { close (); } |
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47 |
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48 hdf5_fstreambase (const char *name, int mode, int /* prot */ = 0) |
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49 { |
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50 if (mode & std::ios::in) |
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51 file_id = H5Fopen (name, H5F_ACC_RDONLY, H5P_DEFAULT); |
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52 else if (mode & std::ios::out) |
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53 { |
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54 if (mode & std::ios::app && H5Fis_hdf5 (name) > 0) |
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55 file_id = H5Fopen (name, H5F_ACC_RDWR, H5P_DEFAULT); |
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56 else |
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57 file_id = H5Fcreate (name, H5F_ACC_TRUNC, H5P_DEFAULT, |
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58 H5P_DEFAULT); |
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59 } |
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60 if (file_id < 0) |
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61 std::ios::setstate (std::ios::badbit); |
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62 |
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63 current_item = 0; |
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64 } |
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65 |
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66 void close () |
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67 { |
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68 if (file_id >= 0) |
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69 { |
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70 if (H5Fclose (file_id) < 0) |
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71 std::ios::setstate (std::ios::badbit); |
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72 file_id = -1; |
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73 } |
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74 } |
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75 |
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76 void open (const char *name, int mode, int) |
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77 { |
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78 clear (); |
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79 |
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80 if (mode & std::ios::in) |
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81 file_id = H5Fopen (name, H5F_ACC_RDONLY, H5P_DEFAULT); |
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82 else if (mode & std::ios::out) |
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83 { |
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84 if (mode & std::ios::app && H5Fis_hdf5 (name) > 0) |
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85 file_id = H5Fopen (name, H5F_ACC_RDWR, H5P_DEFAULT); |
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86 else |
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87 file_id = H5Fcreate (name, H5F_ACC_TRUNC, H5P_DEFAULT, |
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88 H5P_DEFAULT); |
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89 } |
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90 if (file_id < 0) |
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91 std::ios::setstate (std::ios::badbit); |
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92 |
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93 current_item = 0; |
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94 } |
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95 }; |
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96 |
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97 // input and output streams, subclassing istream and ostream |
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98 // so that we can pass them for stream parameters in the functions below. |
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99 |
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100 class hdf5_ifstream : public hdf5_fstreambase, public std::istream |
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101 { |
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102 public: |
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103 |
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104 hdf5_ifstream () : hdf5_fstreambase (), std::istream (0) { } |
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105 |
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106 hdf5_ifstream (const char *name, int mode = std::ios::in|std::ios::binary, |
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107 int prot = 0) |
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108 : hdf5_fstreambase (name, mode, prot), std::istream (0) { } |
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109 |
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110 void open (const char *name, int mode = std::ios::in|std::ios::binary, |
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111 int prot = 0) |
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112 { hdf5_fstreambase::open (name, mode, prot); } |
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113 }; |
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114 |
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115 class hdf5_ofstream : public hdf5_fstreambase, public std::ostream |
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116 { |
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117 public: |
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118 |
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119 hdf5_ofstream () : hdf5_fstreambase (), std::ostream (0) { } |
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120 |
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121 hdf5_ofstream (const char *name, int mode = std::ios::out|std::ios::binary, |
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122 int prot = 0) |
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123 : hdf5_fstreambase (name, mode, prot), std::ostream (0) { } |
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124 |
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125 void open (const char *name, int mode = std::ios::out|std::ios::binary, |
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126 int prot = 0) |
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127 { hdf5_fstreambase::open (name, mode, prot); } |
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128 }; |
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129 |
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130 // Callback data structure for passing data to hdf5_read_next_data, below. |
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131 |
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132 struct |
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133 hdf5_callback_data |
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134 { |
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135 hdf5_callback_data (void) |
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136 : name (), global (false), tc (), doc () { } |
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137 |
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138 // the following fields are set by hdf5_read_data on successful return: |
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139 |
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140 // the name of the variable |
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141 std::string name; |
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142 |
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143 // whether it is global |
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144 bool global; |
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145 |
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146 // the value of the variable, in Octave form |
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147 octave_value tc; |
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148 |
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149 // a documentation string (NULL if none) |
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150 std::string doc; |
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151 }; |
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152 |
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153 #if HAVE_HDF5_INT2FLOAT_CONVERSIONS |
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154 extern OCTINTERP_API hid_t |
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155 save_type_to_hdf5 (save_type st) |
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156 #endif |
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157 |
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158 extern OCTINTERP_API hid_t |
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159 hdf5_make_complex_type (hid_t num_type); |
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160 |
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161 extern OCTINTERP_API bool |
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162 hdf5_types_compatible (hid_t t1, hid_t t2); |
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163 |
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164 extern OCTINTERP_API herr_t |
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165 hdf5_read_next_data (hid_t group_id, const char *name, void *dv); |
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166 |
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167 extern OCTINTERP_API bool |
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168 add_hdf5_data (hid_t loc_id, const octave_value& tc, |
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169 const std::string& name, const std::string& doc, |
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170 bool mark_as_global, bool save_as_floats); |
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171 |
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172 extern OCTINTERP_API int |
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173 save_hdf5_empty (hid_t loc_id, const char *name, const dim_vector d); |
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174 |
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175 extern OCTINTERP_API int |
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176 load_hdf5_empty (hid_t loc_id, const char *name, dim_vector &d); |
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177 |
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178 extern OCTINTERP_API std::string |
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179 read_hdf5_data (std::istream& is, const std::string& filename, bool& global, |
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180 octave_value& tc, std::string& doc); |
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181 |
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182 extern OCTINTERP_API bool |
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183 save_hdf5_data (std::ostream& os, const octave_value& tc, |
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184 const std::string& name, const std::string& doc, |
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185 bool mark_as_global, bool save_as_floats); |
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186 |
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187 #ifdef IDX_TYPE_LONG |
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188 #define H5T_NATIVE_IDX H5T_NATIVE_LONG |
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189 #else |
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190 #define H5T_NATIVE_IDX H5T_NATIVE_INT |
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191 #endif |
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192 |
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193 #endif |
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194 |
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195 #endif |
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196 |
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197 /* |
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198 ;;; Local Variables: *** |
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199 ;;; mode: C++ *** |
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200 ;;; End: *** |
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201 */ |
