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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 #ifdef HAVE_CONFIG_H |
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25 #include <config.h> |
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26 #endif |
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27 |
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28 #include "c-file-ptr-stream.h" |
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29 |
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30 #ifndef SEEK_SET |
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31 #define SEEK_SET 0 |
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32 #endif |
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33 |
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34 #ifndef SEEK_CUR |
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35 #define SEEK_CUR 1 |
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36 #endif |
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37 |
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38 #ifndef SEEK_END |
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39 #define SEEK_END 2 |
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40 #endif |
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41 |
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42 c_file_ptr_buf::~c_file_ptr_buf (void) |
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43 { |
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44 close (); |
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45 } |
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46 |
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47 // XXX FIXME XXX -- I'm sure there is room for improvement here... |
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48 |
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49 c_file_ptr_buf::int_type |
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50 c_file_ptr_buf::overflow (int_type c) |
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51 { |
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52 #if defined (CXX_ISO_COMPLIANT_LIBRARY) |
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53 if (f) |
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54 return (c != traits_type::eof ()) ? fputc (c, f) : flush (); |
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55 else |
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56 return traits_type::not_eof (c); |
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57 #else |
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58 if (f) |
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59 return (c != EOF) ? fputc (c, f) : flush (); |
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60 else |
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61 return EOF; |
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62 #endif |
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63 } |
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64 |
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65 c_file_ptr_buf::int_type |
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66 c_file_ptr_buf::underflow_common (bool bump) |
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67 { |
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68 if (f) |
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69 { |
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70 int_type c = fgetc (f); |
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71 |
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72 if (! bump |
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73 #if defined (CXX_ISO_COMPLIANT_LIBRARY) |
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74 && c != traits_type::eof ()) |
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75 #else |
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76 && c != EOF) |
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77 #endif |
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78 ungetc (c, f); |
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79 |
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80 return c; |
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81 } |
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82 else |
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83 #if defined (CXX_ISO_COMPLIANT_LIBRARY) |
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84 return traits_type::eof (); |
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85 #else |
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86 return EOF; |
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87 #endif |
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88 } |
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89 |
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90 c_file_ptr_buf::int_type |
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91 c_file_ptr_buf::pbackfail (int_type c) |
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92 { |
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93 #if defined (CXX_ISO_COMPLIANT_LIBRARY) |
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94 return (c != traits_type::eof () && f) ? ungetc (c, f) : |
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95 traits_type::not_eof (c); |
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96 #else |
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97 return (c != EOF && f) ? ungetc (c, f) : EOF; |
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98 #endif |
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99 } |
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100 |
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101 std::streamsize |
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102 c_file_ptr_buf::xsputn (const char* s, std::streamsize n) |
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103 { |
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104 if (f) |
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105 return fwrite (s, 1, n, f); |
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106 else |
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107 return 0; |
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108 } |
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109 |
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110 std::streamsize |
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111 c_file_ptr_buf::xsgetn (char *s, std::streamsize n) |
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112 { |
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113 if (f) |
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114 return fread (s, 1, n, f); |
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115 else |
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116 return 0; |
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117 } |
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118 |
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119 static inline int |
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120 seekdir_to_whence (std::ios::seekdir dir) |
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121 { |
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122 return ((dir == std::ios::beg) ? SEEK_SET : |
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123 (dir == std::ios::cur) ? SEEK_CUR : |
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124 (dir == std::ios::end) ? SEEK_END : |
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125 dir); |
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126 } |
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127 |
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128 std::streampos |
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129 c_file_ptr_buf::seekoff (std::streamoff offset, std::ios::seekdir dir, |
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130 std::ios::openmode) |
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131 { |
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132 // XXX FIXME XXX |
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133 #if 0 |
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134 if (f) |
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135 { |
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136 fseek (f, offset, seekdir_to_whence (dir)); |
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137 |
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138 return ftell (f); |
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139 } |
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140 else |
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141 return 0; |
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142 #endif |
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143 return -1; |
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144 } |
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145 |
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146 std::streampos |
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147 c_file_ptr_buf::seekpos (std::streampos offset, std::ios::openmode) |
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148 { |
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149 // XXX FIXME XXX |
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150 #if 0 |
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151 if (f) |
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152 { |
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153 fseek (f, offset, SEEK_SET); |
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154 |
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155 return ftell (f); |
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156 } |
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157 else |
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158 return 0; |
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159 #endif |
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160 return -1; |
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161 } |
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162 |
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163 int |
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164 c_file_ptr_buf::sync (void) |
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165 { |
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166 flush (); |
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167 |
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168 return 0; |
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169 } |
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170 |
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171 int |
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172 c_file_ptr_buf::flush (void) |
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173 { |
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174 return f ? fflush (f) : EOF; |
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175 } |
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176 |
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177 int |
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178 c_file_ptr_buf::close (void) |
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179 { |
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180 int retval = -1; |
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181 |
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182 flush (); |
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183 |
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184 if (f) |
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185 { |
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186 retval = cf (f); |
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187 f = 0; |
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188 } |
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189 |
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190 return retval; |
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191 } |
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192 |
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193 #ifdef HAVE_ZLIB |
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194 |
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195 c_zfile_ptr_buf::~c_zfile_ptr_buf (void) |
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196 { |
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197 close (); |
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198 } |
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199 |
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200 // XXX FIXME XXX -- I'm sure there is room for improvement here... |
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201 |
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202 c_zfile_ptr_buf::int_type |
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203 c_zfile_ptr_buf::overflow (int_type c) |
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204 { |
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205 #if defined (CXX_ISO_COMPLIANT_LIBRARY) |
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206 if (f) |
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207 return (c != traits_type::eof ()) ? gzputc (f, c) : flush (); |
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208 else |
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209 return traits_type::not_eof (c); |
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210 #else |
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211 if (f) |
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212 return (c != EOF) ? gzputc (f, c) : flush (); |
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213 else |
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214 return EOF; |
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215 #endif |
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216 } |
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217 |
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218 c_zfile_ptr_buf::int_type |
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219 c_zfile_ptr_buf::underflow_common (bool bump) |
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220 { |
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221 if (f) |
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222 { |
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223 int_type c = gzgetc (f); |
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224 |
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225 if (! bump |
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226 #if defined (CXX_ISO_COMPLIANT_LIBRARY) |
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227 && c != traits_type::eof ()) |
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228 #else |
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229 && c != EOF) |
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230 #endif |
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231 gzungetc (c, f); |
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232 |
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233 return c; |
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234 } |
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235 else |
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236 #if defined (CXX_ISO_COMPLIANT_LIBRARY) |
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237 return traits_type::eof (); |
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238 #else |
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239 return EOF; |
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240 #endif |
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241 } |
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242 |
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243 c_zfile_ptr_buf::int_type |
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244 c_zfile_ptr_buf::pbackfail (int_type c) |
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245 { |
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246 #if defined (CXX_ISO_COMPLIANT_LIBRARY) |
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247 return (c != traits_type::eof () && f) ? gzungetc (c, f) : |
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248 traits_type::not_eof (c); |
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249 #else |
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250 return (c != EOF && f) ? gzungetc (c, f) : EOF; |
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251 #endif |
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252 } |
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253 |
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254 std::streamsize |
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255 c_zfile_ptr_buf::xsputn (const char* s, std::streamsize n) |
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256 { |
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257 if (f) |
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258 return gzwrite (f, s, n); |
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259 else |
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260 return 0; |
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261 } |
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262 |
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263 std::streamsize |
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264 c_zfile_ptr_buf::xsgetn (char *s, std::streamsize n) |
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265 { |
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266 if (f) |
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267 return gzread (f, s, n); |
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268 else |
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269 return 0; |
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270 } |
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271 |
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272 std::streampos |
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273 c_zfile_ptr_buf::seekoff (std::streamoff offset, std::ios::seekdir dir, |
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274 std::ios::openmode) |
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275 { |
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276 // XXX FIXME XXX |
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277 #if 0 |
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278 if (f) |
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279 { |
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280 gzseek (f, offset, seekdir_to_whence (dir)); |
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281 |
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282 return gztell (f); |
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283 } |
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284 else |
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285 return 0; |
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286 #endif |
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287 return -1; |
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288 } |
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289 |
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290 std::streampos |
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291 c_zfile_ptr_buf::seekpos (std::streampos offset, std::ios::openmode) |
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292 { |
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293 // XXX FIXME XXX |
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294 #if 0 |
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295 if (f) |
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296 { |
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297 gzseek (f, offset, SEEK_SET); |
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298 |
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299 return gztell (f); |
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300 } |
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301 else |
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302 return 0; |
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303 #endif |
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304 return -1; |
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305 } |
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306 |
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307 int |
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308 c_zfile_ptr_buf::sync (void) |
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309 { |
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310 flush (); |
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311 |
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312 return 0; |
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313 } |
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314 |
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315 int |
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316 c_zfile_ptr_buf::flush (void) |
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317 { |
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318 // XXX FIXME XXX -- do we need something more complex here, passing |
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319 // something other than 0 for the second argument to gzflush and |
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320 // checking the return value, etc.? |
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321 |
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322 return f ? gzflush (f, 0) : EOF; |
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323 } |
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324 |
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325 int |
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326 c_zfile_ptr_buf::close (void) |
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327 { |
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328 int retval = -1; |
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329 |
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330 flush (); |
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331 |
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332 if (f) |
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333 { |
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334 retval = cf (f); |
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335 f = 0; |
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336 } |
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337 |
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338 return retval; |
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339 } |
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340 |
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341 #endif |
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342 |
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343 /* |
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344 ;;; Local Variables: *** |
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345 ;;; mode: C++ *** |
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346 ;;; End: *** |
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347 */ |
