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1 /* |
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2 |
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3 Copyright (C) 2000 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_c_file_ptr_stream_h) |
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25 #define octave_c_file_ptr_stream_h 1 |
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26 |
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27 #include <iostream> |
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28 #include <cstdio> |
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29 |
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30 class |
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31 c_file_ptr_buf : public std::streambuf |
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32 { |
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33 public: |
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34 |
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35 #if !defined (CXX_ISO_COMPLIANT_LIBRARY) |
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36 typedef int int_type; |
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37 #else |
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38 typedef std::streambuf::int_type int_type; |
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39 #endif |
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40 |
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41 typedef int (*close_fcn) (FILE *); |
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42 |
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43 FILE* stdiofile (void) { return f; } |
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44 |
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45 c_file_ptr_buf (FILE *f_arg, close_fcn cf_arg = fclose) |
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46 : std::streambuf (), f (f_arg), cf (cf_arg) |
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47 { } |
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48 |
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49 ~c_file_ptr_buf (void); |
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50 |
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51 int_type overflow (int_type); |
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52 |
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53 int_type underflow (void) { return underflow_common (false); } |
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54 |
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55 int_type uflow (void) { return underflow_common (true); } |
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56 |
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57 int_type pbackfail (int_type); |
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58 |
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59 std::streamsize xsputn (const char*, std::streamsize); |
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60 |
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61 std::streamsize xsgetn (char *, std::streamsize); |
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62 |
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63 std::streampos seekoff (std::streamoff, std::ios::seekdir, |
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64 std::ios::openmode = std::ios::in | std::ios::out); |
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65 |
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66 std::streampos seekpos (std::streampos, |
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67 std::ios::openmode = std::ios::in | std::ios::out); |
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68 |
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69 int sync (void); |
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70 |
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71 int flush (void); |
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72 |
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73 int close (void); |
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74 |
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75 int file_number () const { return f ? fileno (f) : -1; } |
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76 |
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77 int seek (long offset, int origin) |
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78 { return f ? fseek (f, offset, origin) : -1; } |
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79 |
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80 long tell (void) { return f ? ftell (f) : -1; } |
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81 |
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82 void clear (void) { if (f) clearerr (f); } |
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83 |
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84 static int fclose (FILE *f) { return ::fclose (f); } |
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85 |
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86 protected: |
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87 |
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88 FILE *f; |
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89 |
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90 close_fcn cf; |
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91 |
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92 private: |
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93 |
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94 int_type underflow_common (bool); |
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95 }; |
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96 |
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97 class |
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98 i_c_file_ptr_stream : public std::istream |
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99 { |
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100 public: |
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101 |
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102 i_c_file_ptr_stream (FILE* f, |
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103 c_file_ptr_buf::close_fcn cf = c_file_ptr_buf::fclose) |
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104 : std::istream (0), buf (new c_file_ptr_buf (f, cf)) { init (buf); } |
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105 |
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106 ~i_c_file_ptr_stream (void) { delete buf; buf = 0; } |
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107 |
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108 c_file_ptr_buf *rdbuf (void) { return buf; } |
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109 |
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110 void close (void) { if (buf) buf->close (); } |
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111 |
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112 int seek (long offset, int origin) |
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113 { return buf ? buf->seek (offset, origin) : -1; } |
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114 |
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115 long tell (void) { return buf ? buf->tell () : -1; } |
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116 |
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117 void clear (void) { if (buf) buf->clear (); std::istream::clear (); } |
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118 |
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119 private: |
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120 |
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121 c_file_ptr_buf *buf; |
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122 }; |
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123 |
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124 class |
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125 o_c_file_ptr_stream : public std::ostream |
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126 { |
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127 public: |
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128 |
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129 o_c_file_ptr_stream (FILE* f, |
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130 c_file_ptr_buf::close_fcn cf = c_file_ptr_buf::fclose) |
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131 : std::ostream (0), buf (new c_file_ptr_buf (f, cf)) { init (buf); } |
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132 |
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133 ~o_c_file_ptr_stream (void) { delete buf; buf = 0; } |
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134 |
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135 c_file_ptr_buf *rdbuf (void) { return buf; } |
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136 |
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137 void close (void) { if (buf) buf->close (); } |
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138 |
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139 int seek (long offset, int origin) |
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140 { return buf ? buf->seek (offset, origin) : -1; } |
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141 |
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142 long tell (void) { return buf ? buf->tell () : -1; } |
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143 |
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144 void clear (void) { if (buf) buf->clear (); std::ostream::clear (); } |
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145 |
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146 private: |
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147 |
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148 c_file_ptr_buf *buf; |
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149 }; |
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150 |
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151 class |
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152 io_c_file_ptr_stream : public std::iostream |
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153 { |
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154 public: |
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155 |
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156 io_c_file_ptr_stream (FILE* f, |
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157 c_file_ptr_buf::close_fcn cf = c_file_ptr_buf::fclose) |
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158 : std::iostream (0), buf (new c_file_ptr_buf (f, cf)) { init (buf); } |
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159 |
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160 ~io_c_file_ptr_stream (void) { delete buf; buf = 0; } |
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161 |
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162 c_file_ptr_buf *rdbuf (void) { return buf; } |
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163 |
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164 void close (void) { if (buf) buf->close (); } |
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165 |
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166 int seek (long offset, int origin) |
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167 { return buf ? buf->seek (offset, origin) : -1; } |
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168 |
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169 long tell (void) { return buf ? buf->tell () : -1; } |
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170 |
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171 void clear (void) { if (buf) buf->clear (); std::iostream::clear (); } |
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172 |
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173 private: |
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174 |
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175 c_file_ptr_buf *buf; |
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176 }; |
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177 |
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178 #endif |
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179 |
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180 /* |
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181 ;;; Local Variables: *** |
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182 ;;; mode: C++ *** |
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183 ;;; End: *** |
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184 */ |
