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1 /* |
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2 |
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3 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 |
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4 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 3 of the License, or (at your |
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11 option) any later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, see |
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20 <http://www.gnu.org/licenses/>. |
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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 // FIXME -- the following three classes could probably share |
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98 // some code... |
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99 |
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100 template <typename STREAM_T, typename FILE_T, typename BUF_T> |
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101 class |
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102 c_file_ptr_stream : public STREAM_T |
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103 { |
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104 public: |
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105 |
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106 c_file_ptr_stream (FILE_T f, typename BUF_T::close_fcn cf = BUF_T::fclose) |
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107 : STREAM_T (0), buf (new BUF_T (f, cf)) { STREAM_T::init (buf); } |
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108 |
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109 ~c_file_ptr_stream (void) { delete buf; buf = 0; } |
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110 |
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111 BUF_T *rdbuf (void) { return buf; } |
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112 |
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113 void close (void) { if (buf) buf->close (); } |
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114 |
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115 int seek (long offset, int origin) |
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116 { return buf ? buf->seek (offset, origin) : -1; } |
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117 |
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118 long tell (void) { return buf ? buf->tell () : -1; } |
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119 |
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120 void clear (void) { if (buf) buf->clear (); STREAM_T::clear (); } |
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121 |
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122 private: |
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123 |
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124 BUF_T *buf; |
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125 }; |
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126 |
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127 typedef c_file_ptr_stream<std::istream, FILE *, c_file_ptr_buf> i_c_file_ptr_stream; |
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128 typedef c_file_ptr_stream<std::ostream, FILE *, c_file_ptr_buf> o_c_file_ptr_stream; |
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129 typedef c_file_ptr_stream<std::iostream, FILE *, c_file_ptr_buf> io_c_file_ptr_stream; |
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130 |
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131 #ifdef HAVE_ZLIB |
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132 |
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133 #ifdef HAVE_ZLIB_H |
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134 #include <zlib.h> |
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135 #endif |
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136 |
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137 class |
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138 c_zfile_ptr_buf : public std::streambuf |
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139 { |
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140 public: |
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141 |
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142 #if !defined (CXX_ISO_COMPLIANT_LIBRARY) |
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143 typedef int int_type; |
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144 #else |
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145 typedef std::streambuf::int_type int_type; |
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146 #endif |
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147 |
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148 typedef int (*close_fcn) (gzFile); |
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149 |
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150 gzFile stdiofile (void) { return f; } |
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151 |
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152 c_zfile_ptr_buf (gzFile f_arg, close_fcn cf_arg = fclose) |
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153 : std::streambuf (), f (f_arg), cf (cf_arg) |
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154 { } |
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155 |
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156 ~c_zfile_ptr_buf (void); |
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157 |
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158 int_type overflow (int_type); |
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159 |
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160 int_type underflow (void) { return underflow_common (false); } |
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161 |
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162 int_type uflow (void) { return underflow_common (true); } |
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163 |
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164 int_type pbackfail (int_type); |
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165 |
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166 std::streamsize xsputn (const char*, std::streamsize); |
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167 |
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168 std::streamsize xsgetn (char *, std::streamsize); |
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169 |
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170 std::streampos seekoff (std::streamoff, std::ios::seekdir, |
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171 std::ios::openmode = std::ios::in | std::ios::out); |
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172 |
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173 std::streampos seekpos (std::streampos, |
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174 std::ios::openmode = std::ios::in | std::ios::out); |
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175 |
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176 int sync (void); |
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177 |
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178 int flush (void); |
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179 |
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180 int close (void); |
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181 |
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182 int file_number () const { return -1; } |
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183 |
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184 int seek (long offset, int origin) |
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185 { return f ? gzseek (f, offset, origin) : -1; } |
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186 |
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187 long tell (void) { return f ? gztell (f) : -1; } |
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188 |
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189 void clear (void) { if (f) gzclearerr (f); } |
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190 |
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191 static int fclose (gzFile f) { return ::gzclose (f); } |
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192 |
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193 protected: |
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194 |
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195 gzFile f; |
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196 |
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197 close_fcn cf; |
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198 |
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199 private: |
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200 |
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201 int_type underflow_common (bool); |
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202 }; |
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203 |
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204 typedef c_file_ptr_stream<std::istream, gzFile, c_zfile_ptr_buf> i_c_zfile_ptr_stream; |
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205 typedef c_file_ptr_stream<std::ostream, gzFile, c_zfile_ptr_buf> o_c_zfile_ptr_stream; |
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206 typedef c_file_ptr_stream<std::iostream, gzFile, c_zfile_ptr_buf> io_c_zfile_ptr_stream; |
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207 |
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208 #endif |
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209 |
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210 #endif |
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211 |
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212 /* |
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213 ;;; Local Variables: *** |
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214 ;;; mode: C++ *** |
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215 ;;; End: *** |
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216 */ |
