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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 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 #ifdef HAVE_CONFIG_H |
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24 #include <config.h> |
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25 #endif |
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26 |
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27 #include "c-file-ptr-stream.h" |
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28 |
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29 #ifndef SEEK_SET |
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30 #define SEEK_SET 0 |
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31 #endif |
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32 |
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33 #ifndef SEEK_CUR |
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34 #define SEEK_CUR 1 |
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35 #endif |
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36 |
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37 #ifndef SEEK_END |
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38 #define SEEK_END 2 |
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39 #endif |
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40 |
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41 c_file_ptr_buf::~c_file_ptr_buf (void) |
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42 { |
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43 close (); |
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44 } |
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45 |
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46 // FIXME -- I'm sure there is room for improvement here... |
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47 |
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48 c_file_ptr_buf::int_type |
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49 c_file_ptr_buf::overflow (int_type c) |
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50 { |
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51 #if defined (CXX_ISO_COMPLIANT_LIBRARY) |
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52 if (f) |
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53 return (c != traits_type::eof ()) ? fputc (c, f) : flush (); |
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54 else |
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55 return traits_type::not_eof (c); |
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56 #else |
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57 if (f) |
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58 return (c != EOF) ? fputc (c, f) : flush (); |
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59 else |
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60 return EOF; |
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61 #endif |
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62 } |
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63 |
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64 c_file_ptr_buf::int_type |
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65 c_file_ptr_buf::underflow_common (bool bump) |
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66 { |
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67 if (f) |
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68 { |
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69 int_type c = fgetc (f); |
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70 |
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71 if (! bump |
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72 #if defined (CXX_ISO_COMPLIANT_LIBRARY) |
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73 && c != traits_type::eof ()) |
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74 #else |
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75 && c != EOF) |
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76 #endif |
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77 ungetc (c, f); |
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78 |
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79 return c; |
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80 } |
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81 else |
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82 #if defined (CXX_ISO_COMPLIANT_LIBRARY) |
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83 return traits_type::eof (); |
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84 #else |
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85 return EOF; |
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86 #endif |
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87 } |
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88 |
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89 c_file_ptr_buf::int_type |
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90 c_file_ptr_buf::pbackfail (int_type c) |
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91 { |
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92 #if defined (CXX_ISO_COMPLIANT_LIBRARY) |
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93 return (c != traits_type::eof () && f) ? ungetc (c, f) : |
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94 traits_type::not_eof (c); |
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95 #else |
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96 return (c != EOF && f) ? ungetc (c, f) : EOF; |
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97 #endif |
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98 } |
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99 |
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100 std::streamsize |
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101 c_file_ptr_buf::xsputn (const char* s, std::streamsize n) |
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102 { |
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103 if (f) |
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104 return fwrite (s, 1, n, f); |
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105 else |
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106 return 0; |
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107 } |
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108 |
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109 std::streamsize |
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110 c_file_ptr_buf::xsgetn (char *s, std::streamsize n) |
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111 { |
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112 if (f) |
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113 return fread (s, 1, n, f); |
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114 else |
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115 return 0; |
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116 } |
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117 |
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118 static inline int |
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119 seekdir_to_whence (std::ios::seekdir dir) |
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120 { |
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121 return ((dir == std::ios::beg) ? SEEK_SET : |
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122 (dir == std::ios::cur) ? SEEK_CUR : |
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123 (dir == std::ios::end) ? SEEK_END : |
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124 dir); |
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125 } |
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126 |
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127 std::streampos |
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128 c_file_ptr_buf::seekoff (std::streamoff offset, std::ios::seekdir dir, |
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129 std::ios::openmode) |
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130 { |
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131 // FIXME |
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132 #if 0 |
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133 if (f) |
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134 { |
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135 fseek (f, offset, seekdir_to_whence (dir)); |
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136 |
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137 return ftell (f); |
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138 } |
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139 else |
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140 return 0; |
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141 #endif |
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142 return -1; |
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143 } |
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144 |
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145 std::streampos |
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146 c_file_ptr_buf::seekpos (std::streampos offset, std::ios::openmode) |
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147 { |
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148 // FIXME |
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149 #if 0 |
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150 if (f) |
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151 { |
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152 fseek (f, offset, SEEK_SET); |
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153 |
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154 return ftell (f); |
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155 } |
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156 else |
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157 return 0; |
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158 #endif |
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159 return -1; |
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160 } |
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161 |
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162 int |
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163 c_file_ptr_buf::sync (void) |
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164 { |
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165 flush (); |
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166 |
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167 return 0; |
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168 } |
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169 |
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170 int |
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171 c_file_ptr_buf::flush (void) |
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172 { |
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173 return f ? fflush (f) : EOF; |
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174 } |
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175 |
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176 int |
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177 c_file_ptr_buf::close (void) |
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178 { |
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179 int retval = -1; |
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180 |
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181 flush (); |
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182 |
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183 if (f) |
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184 { |
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185 retval = cf (f); |
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186 f = 0; |
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187 } |
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188 |
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189 return retval; |
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190 } |
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191 |
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192 #ifdef HAVE_ZLIB |
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193 |
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194 c_zfile_ptr_buf::~c_zfile_ptr_buf (void) |
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195 { |
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196 close (); |
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197 } |
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198 |
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199 // FIXME -- I'm sure there is room for improvement here... |
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200 |
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201 c_zfile_ptr_buf::int_type |
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202 c_zfile_ptr_buf::overflow (int_type c) |
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203 { |
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204 #if defined (CXX_ISO_COMPLIANT_LIBRARY) |
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205 if (f) |
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206 return (c != traits_type::eof ()) ? gzputc (f, c) : flush (); |
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207 else |
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208 return traits_type::not_eof (c); |
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209 #else |
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210 if (f) |
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211 return (c != EOF) ? gzputc (f, c) : flush (); |
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212 else |
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213 return EOF; |
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214 #endif |
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215 } |
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216 |
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217 c_zfile_ptr_buf::int_type |
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218 c_zfile_ptr_buf::underflow_common (bool bump) |
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219 { |
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220 if (f) |
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221 { |
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222 int_type c = gzgetc (f); |
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223 |
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224 if (! bump |
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225 #if defined (CXX_ISO_COMPLIANT_LIBRARY) |
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226 && c != traits_type::eof ()) |
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227 #else |
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228 && c != EOF) |
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229 #endif |
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230 gzungetc (c, f); |
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231 |
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232 return c; |
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233 } |
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234 else |
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235 #if defined (CXX_ISO_COMPLIANT_LIBRARY) |
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236 return traits_type::eof (); |
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237 #else |
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238 return EOF; |
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239 #endif |
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240 } |
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241 |
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242 c_zfile_ptr_buf::int_type |
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243 c_zfile_ptr_buf::pbackfail (int_type c) |
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244 { |
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245 #if defined (CXX_ISO_COMPLIANT_LIBRARY) |
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246 return (c != traits_type::eof () && f) ? gzungetc (c, f) : |
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247 traits_type::not_eof (c); |
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248 #else |
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249 return (c != EOF && f) ? gzungetc (c, f) : EOF; |
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250 #endif |
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251 } |
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252 |
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253 std::streamsize |
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254 c_zfile_ptr_buf::xsputn (const char* s, std::streamsize n) |
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255 { |
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256 if (f) |
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257 return gzwrite (f, s, n); |
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258 else |
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259 return 0; |
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260 } |
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261 |
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262 std::streamsize |
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263 c_zfile_ptr_buf::xsgetn (char *s, std::streamsize n) |
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264 { |
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265 if (f) |
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266 return gzread (f, s, n); |
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267 else |
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268 return 0; |
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269 } |
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270 |
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271 std::streampos |
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272 c_zfile_ptr_buf::seekoff (std::streamoff offset, std::ios::seekdir dir, |
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273 std::ios::openmode) |
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274 { |
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275 // FIXME |
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276 #if 0 |
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277 if (f) |
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278 { |
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279 gzseek (f, offset, seekdir_to_whence (dir)); |
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280 |
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281 return gztell (f); |
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282 } |
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283 else |
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284 return 0; |
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285 #endif |
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286 return -1; |
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287 } |
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288 |
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289 std::streampos |
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290 c_zfile_ptr_buf::seekpos (std::streampos offset, std::ios::openmode) |
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291 { |
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292 // FIXME |
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293 #if 0 |
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294 if (f) |
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295 { |
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296 gzseek (f, offset, SEEK_SET); |
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297 |
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298 return gztell (f); |
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299 } |
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300 else |
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301 return 0; |
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302 #endif |
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303 return -1; |
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304 } |
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305 |
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306 int |
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307 c_zfile_ptr_buf::sync (void) |
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308 { |
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309 flush (); |
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310 |
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311 return 0; |
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312 } |
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313 |
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314 int |
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315 c_zfile_ptr_buf::flush (void) |
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316 { |
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317 // FIXME -- do we need something more complex here, passing |
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318 // something other than 0 for the second argument to gzflush and |
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319 // checking the return value, etc.? |
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320 |
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321 return f ? gzflush (f, 0) : EOF; |
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322 } |
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323 |
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324 int |
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325 c_zfile_ptr_buf::close (void) |
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326 { |
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327 int retval = -1; |
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328 |
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329 flush (); |
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330 |
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331 if (f) |
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332 { |
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333 retval = cf (f); |
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334 f = 0; |
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335 } |
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336 |
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337 return retval; |
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338 } |
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339 |
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340 #endif |
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341 |
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342 /* |
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343 ;;; Local Variables: *** |
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344 ;;; mode: C++ *** |
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345 ;;; End: *** |
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346 */ |
