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1
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1 // utils.cc -*- C++ -*- |
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2 /* |
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3 |
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1009
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4 Copyright (C) 1992, 1993, 1994, 1995 John W. Eaton |
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1
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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 2, or (at your option) any |
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11 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, write to the Free |
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1315
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20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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1
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21 |
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22 */ |
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23 |
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240
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24 #ifdef HAVE_CONFIG_H |
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1192
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25 #include <config.h> |
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1
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26 #endif |
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27 |
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1343
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28 #include <climits> |
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1345
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29 #include <csetjmp> |
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1346
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30 #include <cstring> |
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1343
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31 |
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1728
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32 #include <string> |
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33 |
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1349
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34 #include <fstream.h> |
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35 #include <iostream.h> |
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36 #include <strstream.h> |
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37 |
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1350
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38 #ifdef HAVE_UNISTD_H |
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1
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39 #include <sys/types.h> |
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40 #include <unistd.h> |
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41 #endif |
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367
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42 |
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138
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43 #if defined (HAVE_TERMIOS_H) |
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44 #include <termios.h> |
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45 #elif defined (HAVE_TERMIO_H) |
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1
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46 #include <termio.h> |
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138
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47 #elif defined (HAVE_SGTTY_H) |
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1
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48 #include <sgtty.h> |
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49 #else |
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50 LOSE! LOSE! |
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51 #endif |
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52 |
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1465
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53 #ifndef HAVE_STRNCASECMP |
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54 extern "C" int strncasecmp (const char*, const char*, size_t); |
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55 #endif |
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1
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56 |
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57 #include "SLStack.h" |
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58 |
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1651
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59 #include "oct-cmplx.h" |
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60 |
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1352
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61 #include "defun.h" |
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62 #include "dirfns.h" |
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63 #include "error.h" |
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64 #include "gripes.h" |
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65 #include "help.h" |
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66 #include "input.h" |
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67 #include "mappers.h" |
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1742
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68 #include "oct-hist.h" |
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1750
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69 #include "oct-obj.h" |
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1352
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70 #include "pager.h" |
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1155
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71 #include "pathsearch.h" |
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1690
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72 #include "sysdep.h" |
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1352
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73 #include "sysdir.h" |
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1750
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74 #include "toplev.h" |
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1
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75 #include "unwind-prot.h" |
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1352
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76 #include "user-prefs.h" |
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77 #include "utils.h" |
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78 #include "variables.h" |
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1
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79 |
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80 // Top level context (?) |
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81 extern jmp_buf toplevel; |
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82 |
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581
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83 // Save a string. |
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84 |
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1
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85 char * |
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86 strsave (const char *s) |
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87 { |
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526
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88 if (! s) |
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89 return 0; |
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1
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90 |
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91 int len = strlen (s); |
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92 char *tmp = new char [len+1]; |
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93 tmp = strcpy (tmp, s); |
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94 return tmp; |
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95 } |
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96 |
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581
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97 // Concatenate two strings. |
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98 |
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1
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99 char * |
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100 strconcat (const char *s, const char *t) |
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101 { |
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102 int len = strlen (s) + strlen (t); |
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103 char *tmp = new char [len+1]; |
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104 strcpy (tmp, s); |
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1266
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105 strcat (tmp, t); |
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106 return tmp; |
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1
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107 } |
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108 |
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581
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109 // Throw away input until a given character is read. |
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110 |
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1
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111 void |
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112 discard_until (istream& stream, char character) |
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113 { |
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114 int c; |
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115 for (;;) |
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116 { |
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117 stream >> c; |
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118 if (c == EOF || c == character) |
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119 break; |
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120 } |
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121 if (c != EOF) |
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122 stream.putback ((char) c); |
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123 } |
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124 |
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607
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125 #if 0 |
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126 |
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127 // XXX UNTESTED XXX |
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128 |
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129 // Read input until a given character is read. Returns characters |
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130 // read in a new string that must be freed by the caller. |
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131 |
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132 char * |
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133 read_until (istream& stream, char character) |
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134 { |
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135 int grow_size = 8; |
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136 int limit = grow_size; |
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137 char *buf = new char [limit]; |
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138 char *bp = buf; |
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139 |
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140 get_more: |
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141 is.getline (bp, limit, character); |
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142 |
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143 if (is.gcount () == 0) |
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144 { |
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145 delete [] buf; |
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146 return 0; |
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147 } |
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148 |
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149 if (is.gcount () == limit && buf[limit-1] != '\0') |
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150 { |
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151 char *tmp = new char [limit + grow_size]; |
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152 strcpy (tmp, buf); |
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153 delete [] buf; |
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154 buf = tmp; |
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155 bp = tmp + limit - 1; |
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156 limit += grow_size; |
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157 grow_size *= 2; |
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158 goto get_more; |
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159 } |
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160 |
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161 return buf; |
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162 } |
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163 #endif |
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164 |
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661
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165 // Get a temporary file name. |
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643
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166 |
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167 char * |
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168 octave_tmp_file_name (void) |
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169 { |
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662
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170 static char *retval = 0; |
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171 |
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172 if (retval) |
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173 free (retval); |
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174 |
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175 retval = tempnam (0, "oct-"); |
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176 |
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661
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177 if (! retval) |
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178 error ("can't open temporary file!"); |
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662
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179 |
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661
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180 return retval; |
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643
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181 } |
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182 |
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801
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183 DEFUN ("octave_tmp_file_name", Foctave_tmp_file_name, |
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1488
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184 Soctave_tmp_file_name, 10, |
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801
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185 "octave_tmp_file_name ()") |
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186 { |
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187 tree_constant retval; |
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188 |
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189 if (args.length () == 0) |
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190 retval = octave_tmp_file_name (); |
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191 else |
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192 print_usage ("octave_tmp_file_name"); |
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193 |
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194 return retval; |
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195 } |
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196 |
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1
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197 char ** |
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198 pathstring_to_vector (char *pathstring) |
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199 { |
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526
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200 static char **path = 0; |
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1
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201 |
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526
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202 if (pathstring) |
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1
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203 { |
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204 int nelem = 0; |
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240
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205 char *tmp_path = strsave (pathstring); |
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206 if (*tmp_path != '\0') |
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1
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207 { |
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208 nelem++; |
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240
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209 char *ptr = tmp_path; |
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1
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210 while (*ptr != '\0') |
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211 { |
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1104
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212 if (*ptr == SEPCHAR) |
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1
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213 nelem++; |
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214 ptr++; |
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215 } |
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216 } |
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217 |
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240
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218 char **foo = path; |
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219 while (foo && *foo) |
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244
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220 delete [] *foo++; |
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1
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221 delete [] path; |
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244
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222 |
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1
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223 path = new char * [nelem+1]; |
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526
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224 path[nelem] = 0; |
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1
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225 |
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226 int i = 0; |
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240
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227 char *ptr = tmp_path; |
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1
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228 while (i < nelem) |
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229 { |
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1104
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230 char *end = strchr (ptr, SEPCHAR); |
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526
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231 if (end) |
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1
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232 *end = '\0'; |
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1750
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233 string result = oct_tilde_expand (ptr); |
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234 path[i] = strsave (result.c_str ()); |
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1
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235 ptr = end + 1; |
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236 i++; |
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237 } |
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238 |
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240
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239 delete [] tmp_path; |
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1
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240 } |
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241 |
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242 return path; |
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243 } |
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244 |
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581
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245 // Return to the main command loop in octave.cc. |
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246 |
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1618
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247 extern "C" void |
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1
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248 jump_to_top_level (void) |
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249 { |
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250 run_all_unwind_protects (); |
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251 |
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252 longjmp (toplevel, 1); |
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253 } |
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254 |
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255 int |
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526
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256 almost_match (const char *std, const char *s, int min_match_len, |
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257 int case_sens) |
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1
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258 { |
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259 int stdlen = strlen (std); |
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260 int slen = strlen (s); |
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261 |
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262 return (slen <= stdlen |
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263 && slen >= min_match_len |
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287
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264 && (case_sens |
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265 ? (strncmp (std, s, slen) == 0) |
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266 : (strncasecmp (std, s, slen) == 0))); |
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267 } |
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268 |
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581
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269 // Ugh. |
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270 |
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287
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271 int |
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272 keyword_almost_match (const char **std, int *min_len, const char *s, |
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273 int min_toks_to_match, int max_toks) |
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274 { |
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275 int status = 0; |
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276 int tok_count = 0; |
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277 int toks_matched = 0; |
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278 |
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526
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279 if (! s || *s == '\0' || max_toks < 1) |
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287
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280 return status; |
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281 |
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282 char *kw = strsave (s); |
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283 |
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284 char *t = kw; |
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285 while (*t != '\0') |
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286 { |
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287 if (*t == '\t') |
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288 *t = ' '; |
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289 t++; |
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290 } |
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291 |
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292 char *beg = kw; |
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293 while (*beg == ' ') |
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294 beg++; |
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295 |
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296 if (*beg == '\0') |
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297 return status; |
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298 |
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299 |
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300 char **to_match = new char * [max_toks + 1]; |
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526
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301 const char **s1 = std; |
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287
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302 char **s2 = to_match; |
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303 |
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526
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304 if (! s1 || ! s2) |
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287
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305 goto done; |
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306 |
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307 s2[tok_count] = beg; |
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308 char *end; |
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526
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309 while ((end = strchr (beg, ' ')) != 0) |
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287
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310 { |
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311 *end = '\0'; |
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312 beg = end + 1; |
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313 |
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314 while (*beg == ' ') |
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315 beg++; |
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316 |
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317 if (*beg == '\0') |
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318 break; |
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319 |
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320 tok_count++; |
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321 if (tok_count >= max_toks) |
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322 goto done; |
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323 |
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324 s2[tok_count] = beg; |
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325 } |
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526
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326 s2[tok_count+1] = 0; |
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287
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327 |
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328 s2 = to_match; |
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329 |
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330 for (;;) |
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331 { |
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332 if (! almost_match (*s1, *s2, min_len[toks_matched], 0)) |
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333 goto done; |
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334 |
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335 toks_matched++; |
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336 |
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337 s1++; |
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338 s2++; |
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339 |
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340 if (! *s2) |
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341 { |
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342 status = (toks_matched >= min_toks_to_match); |
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343 goto done; |
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344 } |
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345 |
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346 if (! *s1) |
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347 goto done; |
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348 } |
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349 |
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350 done: |
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351 |
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352 delete [] kw; |
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353 delete [] to_match; |
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354 |
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355 return status; |
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1
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356 } |
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357 |
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358 char ** |
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338
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359 get_fcn_file_names (int& num, const char *dir, int no_suffix) |
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1
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360 { |
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361 static int num_max = 256; |
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362 char **retval = new char * [num_max]; |
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363 int i = 0; |
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364 |
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365 DIR *dirp = opendir (dir); |
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526
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366 if (dirp) |
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1
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367 { |
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368 struct dirent *entry; |
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526
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369 while ((entry = readdir (dirp)) != 0) |
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1
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370 { |
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371 int len = NLENGTH (entry); |
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1664
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372 #if defined (WITH_DYNAMIC_LINKING) |
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826
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373 if ((len > 2 |
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374 && entry->d_name[len-2] == '.' |
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375 && entry->d_name[len-1] == 'm') |
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376 || (len > 4 |
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377 && entry->d_name[len-4] == '.' |
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378 && entry->d_name[len-3] == 'o' |
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379 && entry->d_name[len-2] == 'c' |
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380 && entry->d_name[len-1] == 't')) |
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381 #else |
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1
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382 if (len > 2 |
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383 && entry->d_name[len-2] == '.' |
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384 && entry->d_name[len-1] == 'm') |
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826
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385 #endif |
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1
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386 { |
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387 retval[i] = strsave (entry->d_name); |
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388 if (no_suffix) |
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826
|
389 { |
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390 if (retval[i][len-1] == 'm') |
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391 retval[i][len-2] = '\0'; |
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392 else |
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393 retval[i][len-4] = '\0'; |
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394 } |
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1
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395 |
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396 i++; |
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397 |
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398 if (i == num_max - 1) |
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399 { |
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1358
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400 // Reallocate the array. Only copy pointers, not |
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401 // the strings they point to, then only delete the |
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402 // original array of pointers, and not the strings |
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403 // they point to. |
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244
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404 |
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1
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405 num_max += 256; |
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406 char **tmp = new char * [num_max]; |
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407 for (int j = 0; j < i; j++) |
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408 tmp[j] = retval[j]; |
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409 |
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244
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410 delete [] retval; |
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411 |
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1
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412 retval = tmp; |
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413 } |
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414 } |
|
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415 } |
|
106
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416 closedir (dirp); |
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1
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417 } |
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418 |
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526
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419 retval[i] = 0; |
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1
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420 num = i; |
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421 |
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422 return retval; |
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423 } |
|
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424 |
|
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425 char ** |
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338
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426 get_fcn_file_names (int& num, int no_suffix) |
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1
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427 { |
|
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428 static int num_max = 1024; |
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429 char **retval = new char * [num_max]; |
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430 int i = 0; |
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431 |
|
679
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432 char *path_elt = kpse_path_element (user_pref.loadpath); |
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1
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433 |
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679
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434 while (path_elt) |
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1
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435 { |
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679
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436 str_llist_type *elt_dirs = kpse_element_dirs (path_elt); |
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437 |
|
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438 str_llist_elt_type *dir; |
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439 for (dir = *elt_dirs; dir; dir = STR_LLIST_NEXT (*dir)) |
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1
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440 { |
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679
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441 char *elt_dir = STR_LLIST (*dir); |
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1
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442 |
|
679
|
443 if (elt_dir) |
|
1
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444 { |
|
679
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445 int tmp_num; |
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446 char **names = get_fcn_file_names (tmp_num, elt_dir, no_suffix); |
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447 |
|
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448 if (i + tmp_num >= num_max - 1) |
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449 { |
|
1358
|
450 // Reallocate the array. Only copy pointers, not |
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|
451 // the strings they point to, then only delete the |
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452 // original array of pointers, and not the strings |
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453 // they point to. |
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244
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454 |
|
679
|
455 num_max += 1024; |
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456 char **tmp = new char * [num_max]; |
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457 for (int j = 0; j < i; j++) |
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458 tmp[j] = retval[j]; |
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1
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459 |
|
679
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460 delete [] retval; |
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244
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461 |
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679
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462 retval = tmp; |
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463 } |
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1
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464 |
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679
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465 int k = 0; |
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466 while (k < tmp_num) |
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467 retval[i++] = names[k++]; |
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468 } |
|
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469 } |
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1
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470 |
|
679
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471 path_elt = kpse_path_element (0); |
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1
|
472 } |
|
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473 |
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526
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474 retval[i] = 0; |
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1
|
475 num = i; |
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476 |
|
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477 return retval; |
|
|
478 } |
|
|
479 |
|
1086
|
480 // Convert X to the nearest integer value. Should not pass NaN to |
|
|
481 // this function. |
|
|
482 |
|
1
|
483 int |
|
|
484 NINT (double x) |
|
|
485 { |
|
|
486 if (x > INT_MAX) |
|
|
487 return INT_MAX; |
|
|
488 else if (x < INT_MIN) |
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|
489 return INT_MIN; |
|
|
490 else |
|
|
491 return (x > 0) ? ((int) (x + 0.5)) : ((int) (x - 0.5)); |
|
|
492 } |
|
|
493 |
|
|
494 double |
|
|
495 D_NINT (double x) |
|
|
496 { |
|
|
497 if (xisinf (x) || xisnan (x)) |
|
|
498 return x; |
|
|
499 else |
|
|
500 return floor (x + 0.5); |
|
|
501 } |
|
|
502 |
|
526
|
503 // XXX FIXME XXX -- put these in some file, and make them extern. |
|
|
504 |
|
|
505 static int |
|
|
506 all_strings (const Octave_object& args) |
|
|
507 { |
|
|
508 int n = args.length (); |
|
712
|
509 for (int i = 0; i < n; i++) |
|
610
|
510 if (! args(i).is_string ()) |
|
526
|
511 return 0; |
|
|
512 return 1; |
|
|
513 } |
|
|
514 |
|
|
515 char ** |
|
578
|
516 make_argv (const Octave_object& args, const char *fcn_name) |
|
526
|
517 { |
|
|
518 char **argv = 0; |
|
|
519 if (all_strings (args)) |
|
|
520 { |
|
|
521 int n = args.length (); |
|
|
522 argv = new char * [n + 1]; |
|
578
|
523 argv[0] = strsave (fcn_name); |
|
712
|
524 for (int i = 0; i < n; i++) |
|
1728
|
525 { |
|
|
526 string tstr = args(i).string_value (); |
|
|
527 argv[i+1] = strsave (tstr.c_str ()); |
|
|
528 } |
|
526
|
529 } |
|
|
530 else |
|
578
|
531 error ("%s: expecting all arguments to be strings", fcn_name); |
|
526
|
532 |
|
|
533 return argv; |
|
|
534 } |
|
|
535 |
|
719
|
536 // Return non-zero if either NR or NC is zero. Return -1 if this |
|
|
537 // should be considered fatal; return 1 if this is ok. |
|
|
538 |
|
628
|
539 int |
|
|
540 empty_arg (const char *name, int nr, int nc) |
|
|
541 { |
|
|
542 int is_empty = 0; |
|
|
543 |
|
|
544 if (nr == 0 || nc == 0) |
|
|
545 { |
|
|
546 int flag = user_pref.propagate_empty_matrices; |
|
|
547 |
|
|
548 if (flag < 0) |
|
636
|
549 { |
|
|
550 gripe_empty_arg (name, 0); |
|
|
551 is_empty = 1; |
|
|
552 } |
|
673
|
553 else if (flag == 0) |
|
636
|
554 { |
|
|
555 gripe_empty_arg (name, 1); |
|
|
556 is_empty = -1; |
|
|
557 } |
|
719
|
558 else |
|
|
559 is_empty = 1; |
|
628
|
560 } |
|
|
561 |
|
|
562 return is_empty; |
|
|
563 } |
|
|
564 |
|
581
|
565 // Format a list in neat columns. Mostly stolen from GNU ls. This |
|
|
566 // should maybe be in utils.cc. |
|
|
567 |
|
526
|
568 ostrstream& |
|
|
569 list_in_columns (ostrstream& os, char **list) |
|
|
570 { |
|
1358
|
571 // Compute the maximum name length. |
|
526
|
572 |
|
|
573 int max_name_length = 0; |
|
|
574 int total_names = 0; |
|
1321
|
575 char **names = 0; |
|
|
576 for (names = list; *names; names++) |
|
526
|
577 { |
|
|
578 total_names++; |
|
|
579 int name_length = strlen (*names); |
|
|
580 if (name_length > max_name_length) |
|
|
581 max_name_length = name_length; |
|
|
582 } |
|
|
583 |
|
1358
|
584 // Allow at least two spaces between names. |
|
526
|
585 |
|
|
586 max_name_length += 2; |
|
|
587 |
|
1358
|
588 // Calculate the maximum number of columns that will fit. |
|
526
|
589 |
|
|
590 int line_length = terminal_columns (); |
|
|
591 int cols = line_length / max_name_length; |
|
|
592 if (cols == 0) |
|
|
593 cols = 1; |
|
|
594 |
|
1358
|
595 // Calculate the number of rows that will be in each column except |
|
|
596 // possibly for a short column on the right. |
|
526
|
597 |
|
|
598 int rows = total_names / cols + (total_names % cols != 0); |
|
|
599 |
|
1358
|
600 // Recalculate columns based on rows. |
|
526
|
601 |
|
|
602 cols = total_names / rows + (total_names % rows != 0); |
|
|
603 |
|
|
604 names = list; |
|
|
605 int count; |
|
|
606 for (int row = 0; row < rows; row++) |
|
|
607 { |
|
|
608 count = row; |
|
|
609 int pos = 0; |
|
|
610 |
|
1358
|
611 // Print the next row. |
|
526
|
612 |
|
|
613 while (1) |
|
|
614 { |
|
|
615 os << *(names + count); |
|
|
616 int name_length = strlen (*(names + count)); |
|
|
617 |
|
|
618 count += rows; |
|
|
619 if (count >= total_names) |
|
|
620 break; |
|
|
621 |
|
|
622 int spaces_to_pad = max_name_length - name_length; |
|
|
623 for (int i = 0; i < spaces_to_pad; i++) |
|
|
624 os << " "; |
|
|
625 pos += max_name_length; |
|
|
626 } |
|
|
627 os << "\n"; |
|
|
628 } |
|
|
629 |
|
|
630 return os; |
|
|
631 } |
|
|
632 |
|
581
|
633 // See if the given file is in the path. |
|
|
634 |
|
526
|
635 char * |
|
686
|
636 search_path_for_file (const char *path, const char *name) |
|
|
637 { |
|
|
638 char *retval = 0; |
|
|
639 |
|
|
640 char *tmp = kpse_path_search (path, name, kpathsea_true); |
|
|
641 |
|
|
642 if (tmp) |
|
|
643 { |
|
|
644 retval = make_absolute (tmp, the_current_working_directory); |
|
|
645 free (tmp); |
|
|
646 } |
|
|
647 |
|
|
648 return retval; |
|
|
649 } |
|
|
650 |
|
1488
|
651 DEFUN ("file_in_path", Ffile_in_path, Sfile_in_path, 10, |
|
686
|
652 "file_in_path (PATH, NAME)") |
|
|
653 { |
|
|
654 Octave_object retval; |
|
|
655 |
|
|
656 DEFINE_ARGV("file_in_path"); |
|
|
657 |
|
|
658 if (argc == 3) |
|
|
659 { |
|
|
660 char *fname = search_path_for_file (argv[1], argv[2]); |
|
|
661 |
|
|
662 if (fname) |
|
|
663 retval = fname; |
|
|
664 else |
|
|
665 retval = Matrix (); |
|
|
666 } |
|
|
667 else |
|
|
668 print_usage ("file_in_path"); |
|
|
669 |
|
|
670 DELETE_ARGV; |
|
|
671 |
|
|
672 return retval; |
|
|
673 } |
|
|
674 |
|
|
675 |
|
|
676 char * |
|
526
|
677 file_in_path (const char *name, const char *suffix) |
|
|
678 { |
|
|
679 char *retval = 0; |
|
|
680 |
|
1266
|
681 char *nm = 0; |
|
686
|
682 |
|
526
|
683 if (suffix) |
|
1266
|
684 nm = strconcat (name, suffix); |
|
|
685 else |
|
|
686 nm = strsave (name); |
|
526
|
687 |
|
|
688 if (! the_current_working_directory) |
|
|
689 get_working_directory ("file_in_path"); |
|
|
690 |
|
686
|
691 retval = search_path_for_file (user_pref.loadpath, nm); |
|
526
|
692 |
|
686
|
693 delete [] nm; |
|
526
|
694 |
|
|
695 return retval; |
|
|
696 } |
|
|
697 |
|
581
|
698 // See if there is an function file in the path. If so, return the |
|
|
699 // full path to the file. |
|
|
700 |
|
526
|
701 char * |
|
|
702 fcn_file_in_path (const char *name) |
|
|
703 { |
|
908
|
704 if (name) |
|
|
705 { |
|
|
706 int len = strlen (name); |
|
|
707 |
|
|
708 if (name [len - 2] == '.' && name [len - 1] == 'm') |
|
|
709 return file_in_path (name, ""); |
|
|
710 else |
|
|
711 return file_in_path (name, ".m"); |
|
|
712 } |
|
|
713 else |
|
|
714 return 0; |
|
526
|
715 } |
|
|
716 |
|
581
|
717 // See if there is an octave file in the path. If so, return the |
|
|
718 // full path to the file. |
|
|
719 |
|
572
|
720 char * |
|
|
721 oct_file_in_path (const char *name) |
|
|
722 { |
|
908
|
723 if (name) |
|
|
724 { |
|
|
725 int len = strlen (name); |
|
|
726 |
|
|
727 if (name [len - 4] == '.' && name [len - 3] == 'o' |
|
|
728 && name [len - 2] == 'c' && name [len - 1] == 't') |
|
|
729 return file_in_path (name, ""); |
|
|
730 else |
|
|
731 return file_in_path (name, ".oct"); |
|
|
732 } |
|
|
733 else |
|
|
734 return 0; |
|
572
|
735 } |
|
|
736 |
|
801
|
737 char * |
|
|
738 undo_string_escape (char c) |
|
|
739 { |
|
|
740 static char retval[2]; |
|
|
741 retval[1] = '\0'; |
|
|
742 |
|
|
743 if (! c) |
|
|
744 return 0; |
|
|
745 |
|
|
746 switch (c) |
|
|
747 { |
|
|
748 case '\a': |
|
|
749 return "\\a"; |
|
|
750 |
|
|
751 case '\b': // backspace |
|
|
752 return "\\b"; |
|
|
753 |
|
|
754 case '\f': // formfeed |
|
|
755 return "\\f"; |
|
|
756 |
|
|
757 case '\n': // newline |
|
|
758 return "\\n"; |
|
|
759 |
|
|
760 case '\r': // carriage return |
|
|
761 return "\\r"; |
|
|
762 |
|
|
763 case '\t': // horizontal tab |
|
|
764 return "\\t"; |
|
|
765 |
|
|
766 case '\v': // vertical tab |
|
|
767 return "\\v"; |
|
|
768 |
|
|
769 case '\\': // backslash |
|
|
770 return "\\\\"; |
|
|
771 |
|
|
772 case '"': // double quote |
|
|
773 return "\\\""; |
|
|
774 |
|
|
775 default: |
|
|
776 retval[0] = c; |
|
|
777 return retval; |
|
|
778 } |
|
|
779 } |
|
|
780 |
|
|
781 char * |
|
1363
|
782 undo_string_escapes (const char *s) |
|
801
|
783 { |
|
|
784 ostrstream buf; |
|
|
785 |
|
|
786 char *t; |
|
1215
|
787 while ((t = undo_string_escape (*s++))) |
|
801
|
788 buf << t; |
|
|
789 buf << ends; |
|
|
790 |
|
|
791 return buf.str (); |
|
|
792 } |
|
|
793 |
|
|
794 DEFUN ("undo_string_escapes", Fundo_string_escapes, |
|
1488
|
795 Sundo_string_escapes, 10, |
|
801
|
796 "undo_string_escapes (STRING)") |
|
|
797 { |
|
|
798 tree_constant retval; |
|
|
799 |
|
|
800 int nargin = args.length (); |
|
|
801 |
|
|
802 if (nargin == 1 && args(0).is_string ()) |
|
|
803 { |
|
1728
|
804 string tstr = args(0).string_value (); |
|
|
805 char *str = undo_string_escapes (tstr.c_str ()); |
|
801
|
806 retval = str; |
|
|
807 delete [] str; |
|
|
808 } |
|
|
809 else |
|
1023
|
810 print_usage ("undo_string_escapes"); |
|
801
|
811 |
|
|
812 return retval; |
|
|
813 } |
|
|
814 |
|
1711
|
815 // This function was adapted from xputenv from Karl Berry's kpathsearch |
|
|
816 // library. |
|
|
817 |
|
|
818 void |
|
|
819 oct_putenv (const char *var_name, const char *value) |
|
|
820 { |
|
|
821 static const char **saved_env_items = 0; |
|
|
822 static unsigned saved_len; |
|
|
823 char *old_item = 0; |
|
|
824 |
|
|
825 int new_len = strlen (var_name) + strlen (value) + 2; |
|
|
826 |
|
|
827 char *new_item = new char [new_len]; |
|
|
828 |
|
|
829 sprintf (new_item, "%s=%s", var_name, value); |
|
|
830 |
|
|
831 #ifndef SMART_PUTENV |
|
|
832 |
|
|
833 // Check if we have saved anything yet. |
|
|
834 |
|
|
835 if (! saved_env_items) |
|
|
836 { |
|
|
837 saved_env_items = new const char * [1]; |
|
|
838 saved_env_items[0] = var_name; |
|
|
839 saved_len = 1; |
|
|
840 } |
|
|
841 else |
|
|
842 { |
|
|
843 // Check if we've assigned VAR_NAME before. |
|
|
844 |
|
|
845 unsigned len = strlen (var_name); |
|
|
846 |
|
|
847 for (unsigned i = 0; i < saved_len && ! old_item; i++) |
|
|
848 { |
|
|
849 if (strcmp (saved_env_items[i], var_name) == 0) |
|
|
850 { |
|
|
851 old_item = getenv (var_name); |
|
|
852 |
|
|
853 assert (old_item); |
|
|
854 |
|
|
855 // Back up to the `NAME=' in the environment before the |
|
|
856 // value that getenv returns. |
|
|
857 |
|
|
858 old_item -= (len + 1); |
|
|
859 } |
|
|
860 } |
|
|
861 |
|
|
862 if (! old_item) |
|
|
863 { |
|
|
864 // If we haven't seen VAR_NAME before, save it. Assume it |
|
|
865 // is in safe storage. |
|
|
866 |
|
|
867 saved_len++; |
|
|
868 |
|
|
869 const char **tmp = new const char * [saved_len]; |
|
|
870 |
|
|
871 for (unsigned i = 0; i < saved_len - 1; i++) |
|
|
872 tmp[i] = saved_env_items[i]; |
|
|
873 |
|
|
874 tmp[saved_len - 1] = var_name; |
|
|
875 |
|
|
876 delete [] saved_env_items; |
|
|
877 |
|
|
878 saved_env_items = tmp; |
|
|
879 } |
|
|
880 } |
|
|
881 |
|
|
882 #endif |
|
|
883 |
|
|
884 // As far as I can see there's no way to distinguish between the |
|
|
885 // various errors; putenv doesn't have errno values. |
|
|
886 |
|
|
887 if (putenv (new_item) < 0) |
|
|
888 error ("putenv (%s) failed", new_item); |
|
|
889 |
|
|
890 #ifndef SMART_PUTENV |
|
|
891 |
|
|
892 // Can't free `new_item' because its contained value is now in |
|
|
893 // `environ', but we can free `old_item', since it's been replaced. |
|
|
894 |
|
|
895 delete [] old_item; |
|
|
896 |
|
|
897 #endif |
|
|
898 } |
|
|
899 |
|
572
|
900 /* |
|
1
|
901 ;;; Local Variables: *** |
|
|
902 ;;; mode: C++ *** |
|
|
903 ;;; page-delimiter: "^/\\*" *** |
|
|
904 ;;; End: *** |
|
|
905 */ |
