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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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296
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4 Copyright (C) 1992, 1993, 1994 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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20 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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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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25 #include "config.h" |
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1
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26 #endif |
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27 |
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28 #include <sys/types.h> |
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29 #ifdef HAVE_UNISTD_H |
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30 #include <unistd.h> |
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31 #endif |
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32 #include <sys/param.h> |
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33 #include <string.h> |
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34 #include <limits.h> |
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35 #include <iostream.h> |
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36 #include <strstream.h> |
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37 #include <fstream.h> |
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367
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38 |
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526
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39 #include <Complex.h> |
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287
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40 |
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41 extern "C" |
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42 { |
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636
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43 #include <setjmp.h> |
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44 |
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45 #ifndef HAVE_STRNCASECMP |
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287
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46 extern int strncasecmp (const char*, const char*, size_t); |
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636
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47 #endif |
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287
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48 |
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679
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49 #define boolean kpathsea_boolean |
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50 #define false kpathsea_false |
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51 #define true kpathsea_true |
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52 #include <kpathsea/pathsearch.h> |
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53 |
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138
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54 #if defined (HAVE_TERMIOS_H) |
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55 #include <termios.h> |
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56 #elif defined (HAVE_TERMIO_H) |
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1
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57 #include <termio.h> |
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138
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58 #elif defined (HAVE_SGTTY_H) |
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1
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59 #include <sgtty.h> |
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60 #else |
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61 LOSE! LOSE! |
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62 #endif |
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63 |
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581
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64 #include <readline/tilde.h> |
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1
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65 } |
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66 |
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526
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67 // This mess suggested by the autoconf manual. |
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68 // unistd.h defines _POSIX_VERSION on POSIX.1 systems. |
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69 #if defined(DIRENT) || defined(_POSIX_VERSION) |
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70 #include <dirent.h> |
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71 #define NLENGTH(dirent) (strlen((dirent)->d_name)) |
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72 #else /* not (DIRENT or _POSIX_VERSION) */ |
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73 #define dirent direct |
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74 #define NLENGTH(dirent) ((dirent)->d_namlen) |
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75 #ifdef SYSNDIR |
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76 #include <sys/ndir.h> |
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77 #endif /* SYSNDIR */ |
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78 #ifdef SYSDIR |
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79 #include <sys/dir.h> |
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80 #endif /* SYSDIR */ |
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81 #ifdef NDIR |
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82 #include <ndir.h> |
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83 #endif /* NDIR */ |
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84 #endif /* not (DIRENT or _POSIX_VERSION) */ |
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85 |
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1
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86 #include "SLStack.h" |
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87 |
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88 #include "procstream.h" |
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89 #include "user-prefs.h" |
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90 #include "variables.h" |
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526
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91 #include "dirfns.h" |
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686
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92 #include "defun.h" |
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1
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93 #include "error.h" |
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686
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94 #include "help.h" |
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628
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95 #include "gripes.h" |
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526
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96 #include "pager.h" |
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1
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97 #include "utils.h" |
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175
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98 #include "input.h" |
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1
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99 #include "octave.h" |
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526
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100 #include "oct-obj.h" |
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1
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101 #include "mappers.h" |
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102 #include "tree-const.h" |
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103 #include "unwind-prot.h" |
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104 #include "octave-hist.h" |
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105 |
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106 // Top level context (?) |
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107 extern jmp_buf toplevel; |
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108 |
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581
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109 // Save a string. |
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110 |
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1
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111 char * |
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112 strsave (const char *s) |
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113 { |
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526
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114 if (! s) |
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115 return 0; |
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1
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116 |
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117 int len = strlen (s); |
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118 char *tmp = new char [len+1]; |
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119 tmp = strcpy (tmp, s); |
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120 return tmp; |
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121 } |
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122 |
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581
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123 // Concatenate two strings. |
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124 |
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1
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125 char * |
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126 strconcat (const char *s, const char *t) |
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127 { |
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128 int len = strlen (s) + strlen (t); |
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129 char *tmp = new char [len+1]; |
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130 strcpy (tmp, s); |
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131 return strcat (tmp, t); |
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132 } |
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133 |
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581
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134 // Throw away input until a given character is read. |
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135 |
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1
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136 void |
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137 discard_until (istream& stream, char character) |
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138 { |
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139 int c; |
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140 for (;;) |
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141 { |
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142 stream >> c; |
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143 if (c == EOF || c == character) |
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144 break; |
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145 } |
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146 if (c != EOF) |
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147 stream.putback ((char) c); |
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148 } |
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149 |
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607
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150 #if 0 |
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151 |
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152 // XXX UNTESTED XXX |
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153 |
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154 // Read input until a given character is read. Returns characters |
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155 // read in a new string that must be freed by the caller. |
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156 |
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157 char * |
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158 read_until (istream& stream, char character) |
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159 { |
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160 int grow_size = 8; |
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161 int limit = grow_size; |
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162 char *buf = new char [limit]; |
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163 char *bp = buf; |
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164 |
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165 get_more: |
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166 is.getline (bp, limit, character); |
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167 |
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168 if (is.gcount () == 0) |
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169 { |
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170 delete [] buf; |
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171 return 0; |
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172 } |
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173 |
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174 if (is.gcount () == limit && buf[limit-1] != '\0') |
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175 { |
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176 char *tmp = new char [limit + grow_size]; |
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177 strcpy (tmp, buf); |
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178 delete [] buf; |
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179 buf = tmp; |
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180 bp = tmp + limit - 1; |
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181 limit += grow_size; |
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182 grow_size *= 2; |
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183 goto get_more; |
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184 } |
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185 |
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186 return buf; |
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187 } |
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188 #endif |
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189 |
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661
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190 // Get a temporary file name. |
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643
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191 |
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192 char * |
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193 octave_tmp_file_name (void) |
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194 { |
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662
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195 static char *retval = 0; |
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196 |
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197 if (retval) |
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198 free (retval); |
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199 |
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200 retval = tempnam (0, "oct-"); |
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201 |
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661
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202 if (! retval) |
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203 error ("can't open temporary file!"); |
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662
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204 |
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661
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205 return retval; |
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643
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206 } |
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207 |
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801
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208 DEFUN ("octave_tmp_file_name", Foctave_tmp_file_name, |
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209 Soctave_tmp_file_name, 0, 1, |
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210 "octave_tmp_file_name ()") |
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211 { |
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212 tree_constant retval; |
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213 |
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214 if (args.length () == 0) |
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215 retval = octave_tmp_file_name (); |
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216 else |
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217 print_usage ("octave_tmp_file_name"); |
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218 |
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219 return retval; |
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220 } |
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221 |
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1
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222 char ** |
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223 pathstring_to_vector (char *pathstring) |
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224 { |
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526
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225 static char **path = 0; |
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1
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226 |
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526
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227 if (pathstring) |
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1
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228 { |
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229 int nelem = 0; |
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240
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230 char *tmp_path = strsave (pathstring); |
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231 if (*tmp_path != '\0') |
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1
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232 { |
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233 nelem++; |
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240
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234 char *ptr = tmp_path; |
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1
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235 while (*ptr != '\0') |
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236 { |
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237 if (*ptr == ':') |
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238 nelem++; |
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239 ptr++; |
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240 } |
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241 } |
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242 |
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240
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243 char **foo = path; |
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244 while (foo && *foo) |
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244
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245 delete [] *foo++; |
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1
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246 delete [] path; |
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244
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247 |
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1
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248 path = new char * [nelem+1]; |
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526
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249 path[nelem] = 0; |
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1
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250 |
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251 int i = 0; |
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240
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252 char *ptr = tmp_path; |
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1
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253 while (i < nelem) |
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254 { |
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255 char *end = strchr (ptr, ':'); |
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526
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256 if (end) |
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1
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257 *end = '\0'; |
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258 char *result = tilde_expand (ptr); |
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259 path[i] = strsave (result); |
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260 free (result); |
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261 ptr = end + 1; |
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262 i++; |
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263 } |
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264 |
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240
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265 delete [] tmp_path; |
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1
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266 } |
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267 |
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268 return path; |
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269 } |
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270 |
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581
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271 // Return to the main command loop in octave.cc. |
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272 |
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189
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273 void |
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1
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274 jump_to_top_level (void) |
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275 { |
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276 run_all_unwind_protects (); |
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277 |
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278 longjmp (toplevel, 1); |
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279 } |
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280 |
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281 int |
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526
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282 almost_match (const char *std, const char *s, int min_match_len, |
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283 int case_sens) |
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1
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284 { |
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285 int stdlen = strlen (std); |
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286 int slen = strlen (s); |
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287 |
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288 return (slen <= stdlen |
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289 && slen >= min_match_len |
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287
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290 && (case_sens |
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291 ? (strncmp (std, s, slen) == 0) |
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292 : (strncasecmp (std, s, slen) == 0))); |
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293 } |
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294 |
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581
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295 // Ugh. |
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296 |
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287
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297 int |
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298 keyword_almost_match (const char **std, int *min_len, const char *s, |
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299 int min_toks_to_match, int max_toks) |
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300 { |
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301 int status = 0; |
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302 int tok_count = 0; |
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303 int toks_matched = 0; |
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304 |
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526
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305 if (! s || *s == '\0' || max_toks < 1) |
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287
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306 return status; |
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307 |
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308 char *kw = strsave (s); |
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309 |
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310 char *t = kw; |
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311 while (*t != '\0') |
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312 { |
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313 if (*t == '\t') |
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314 *t = ' '; |
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315 t++; |
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316 } |
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317 |
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318 char *beg = kw; |
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319 while (*beg == ' ') |
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320 beg++; |
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321 |
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322 if (*beg == '\0') |
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323 return status; |
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324 |
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325 |
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326 char **to_match = new char * [max_toks + 1]; |
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526
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327 const char **s1 = std; |
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287
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328 char **s2 = to_match; |
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329 |
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526
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330 if (! s1 || ! s2) |
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287
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331 goto done; |
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332 |
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333 s2[tok_count] = beg; |
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334 char *end; |
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526
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335 while ((end = strchr (beg, ' ')) != 0) |
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287
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336 { |
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337 *end = '\0'; |
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338 beg = end + 1; |
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339 |
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340 while (*beg == ' ') |
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341 beg++; |
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342 |
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343 if (*beg == '\0') |
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344 break; |
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345 |
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346 tok_count++; |
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347 if (tok_count >= max_toks) |
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348 goto done; |
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349 |
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350 s2[tok_count] = beg; |
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351 } |
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526
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352 s2[tok_count+1] = 0; |
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287
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353 |
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354 s2 = to_match; |
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355 |
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356 for (;;) |
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357 { |
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358 if (! almost_match (*s1, *s2, min_len[toks_matched], 0)) |
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359 goto done; |
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360 |
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361 toks_matched++; |
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362 |
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363 s1++; |
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364 s2++; |
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365 |
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366 if (! *s2) |
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367 { |
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368 status = (toks_matched >= min_toks_to_match); |
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369 goto done; |
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370 } |
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371 |
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372 if (! *s1) |
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373 goto done; |
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374 } |
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375 |
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376 done: |
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377 |
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378 delete [] kw; |
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379 delete [] to_match; |
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380 |
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381 return status; |
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1
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382 } |
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383 |
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384 char ** |
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338
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385 get_fcn_file_names (int& num, const char *dir, int no_suffix) |
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1
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386 { |
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387 static int num_max = 256; |
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388 char **retval = new char * [num_max]; |
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389 int i = 0; |
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390 |
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391 DIR *dirp = opendir (dir); |
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526
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392 if (dirp) |
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1
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393 { |
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394 struct dirent *entry; |
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526
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395 while ((entry = readdir (dirp)) != 0) |
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1
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396 { |
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397 int len = NLENGTH (entry); |
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826
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398 #ifdef WITH_DLD |
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399 if ((len > 2 |
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400 && entry->d_name[len-2] == '.' |
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401 && entry->d_name[len-1] == 'm') |
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402 || (len > 4 |
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403 && entry->d_name[len-4] == '.' |
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404 && entry->d_name[len-3] == 'o' |
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405 && entry->d_name[len-2] == 'c' |
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406 && entry->d_name[len-1] == 't')) |
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407 #else |
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1
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408 if (len > 2 |
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409 && entry->d_name[len-2] == '.' |
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410 && entry->d_name[len-1] == 'm') |
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826
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411 #endif |
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1
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412 { |
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413 retval[i] = strsave (entry->d_name); |
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414 if (no_suffix) |
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826
|
415 { |
|
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416 if (retval[i][len-1] == 'm') |
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417 retval[i][len-2] = '\0'; |
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418 else |
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419 retval[i][len-4] = '\0'; |
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420 } |
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1
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421 |
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422 i++; |
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423 |
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424 if (i == num_max - 1) |
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425 { |
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244
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426 // Reallocate the array. Only copy pointers, not the strings they |
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427 // point to, then only delete the original array of pointers, and not |
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428 // the strings they point to. |
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429 |
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1
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430 num_max += 256; |
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431 char **tmp = new char * [num_max]; |
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432 for (int j = 0; j < i; j++) |
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433 tmp[j] = retval[j]; |
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434 |
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244
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435 delete [] retval; |
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436 |
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1
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437 retval = tmp; |
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|
438 } |
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439 } |
|
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440 } |
|
106
|
441 closedir (dirp); |
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1
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442 } |
|
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443 |
|
526
|
444 retval[i] = 0; |
|
1
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445 num = i; |
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446 |
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447 return retval; |
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448 } |
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449 |
|
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450 char ** |
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338
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451 get_fcn_file_names (int& num, int no_suffix) |
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1
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452 { |
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453 static int num_max = 1024; |
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454 char **retval = new char * [num_max]; |
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455 int i = 0; |
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456 |
|
679
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457 char *path_elt = kpse_path_element (user_pref.loadpath); |
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1
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458 |
|
679
|
459 while (path_elt) |
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1
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460 { |
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679
|
461 str_llist_type *elt_dirs = kpse_element_dirs (path_elt); |
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462 |
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463 str_llist_elt_type *dir; |
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464 for (dir = *elt_dirs; dir; dir = STR_LLIST_NEXT (*dir)) |
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1
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465 { |
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679
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466 char *elt_dir = STR_LLIST (*dir); |
|
1
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467 |
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679
|
468 if (elt_dir) |
|
1
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469 { |
|
679
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470 int tmp_num; |
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471 char **names = get_fcn_file_names (tmp_num, elt_dir, no_suffix); |
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|
472 |
|
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473 if (i + tmp_num >= num_max - 1) |
|
|
474 { |
|
244
|
475 // Reallocate the array. Only copy pointers, not the strings they |
|
|
476 // point to, then only delete the original array of pointers, and not |
|
|
477 // the strings they point to. |
|
|
478 |
|
679
|
479 num_max += 1024; |
|
|
480 char **tmp = new char * [num_max]; |
|
|
481 for (int j = 0; j < i; j++) |
|
|
482 tmp[j] = retval[j]; |
|
1
|
483 |
|
679
|
484 delete [] retval; |
|
244
|
485 |
|
679
|
486 retval = tmp; |
|
|
487 } |
|
1
|
488 |
|
679
|
489 int k = 0; |
|
|
490 while (k < tmp_num) |
|
|
491 retval[i++] = names[k++]; |
|
|
492 } |
|
|
493 } |
|
1
|
494 |
|
679
|
495 path_elt = kpse_path_element (0); |
|
1
|
496 } |
|
|
497 |
|
526
|
498 retval[i] = 0; |
|
1
|
499 num = i; |
|
|
500 |
|
|
501 return retval; |
|
|
502 } |
|
|
503 |
|
|
504 int |
|
|
505 NINT (double x) |
|
|
506 { |
|
|
507 if (x > INT_MAX) |
|
|
508 return INT_MAX; |
|
|
509 else if (x < INT_MIN) |
|
|
510 return INT_MIN; |
|
|
511 else |
|
|
512 return (x > 0) ? ((int) (x + 0.5)) : ((int) (x - 0.5)); |
|
|
513 } |
|
|
514 |
|
|
515 double |
|
|
516 D_NINT (double x) |
|
|
517 { |
|
|
518 if (xisinf (x) || xisnan (x)) |
|
|
519 return x; |
|
|
520 else |
|
|
521 return floor (x + 0.5); |
|
|
522 } |
|
|
523 |
|
526
|
524 // XXX FIXME XXX -- put these in some file, and make them extern. |
|
|
525 |
|
|
526 static int |
|
|
527 all_strings (const Octave_object& args) |
|
|
528 { |
|
|
529 int n = args.length (); |
|
712
|
530 for (int i = 0; i < n; i++) |
|
610
|
531 if (! args(i).is_string ()) |
|
526
|
532 return 0; |
|
|
533 return 1; |
|
|
534 } |
|
|
535 |
|
|
536 char ** |
|
578
|
537 make_argv (const Octave_object& args, const char *fcn_name) |
|
526
|
538 { |
|
|
539 char **argv = 0; |
|
|
540 if (all_strings (args)) |
|
|
541 { |
|
|
542 int n = args.length (); |
|
|
543 argv = new char * [n + 1]; |
|
578
|
544 argv[0] = strsave (fcn_name); |
|
712
|
545 for (int i = 0; i < n; i++) |
|
|
546 argv[i+1] = strsave (args(i).string_value ()); |
|
526
|
547 } |
|
|
548 else |
|
578
|
549 error ("%s: expecting all arguments to be strings", fcn_name); |
|
526
|
550 |
|
|
551 return argv; |
|
|
552 } |
|
|
553 |
|
719
|
554 // Return non-zero if either NR or NC is zero. Return -1 if this |
|
|
555 // should be considered fatal; return 1 if this is ok. |
|
|
556 |
|
628
|
557 int |
|
|
558 empty_arg (const char *name, int nr, int nc) |
|
|
559 { |
|
|
560 int is_empty = 0; |
|
|
561 |
|
|
562 if (nr == 0 || nc == 0) |
|
|
563 { |
|
|
564 int flag = user_pref.propagate_empty_matrices; |
|
|
565 |
|
|
566 if (flag < 0) |
|
636
|
567 { |
|
|
568 gripe_empty_arg (name, 0); |
|
|
569 is_empty = 1; |
|
|
570 } |
|
673
|
571 else if (flag == 0) |
|
636
|
572 { |
|
|
573 gripe_empty_arg (name, 1); |
|
|
574 is_empty = -1; |
|
|
575 } |
|
719
|
576 else |
|
|
577 is_empty = 1; |
|
628
|
578 } |
|
|
579 |
|
|
580 return is_empty; |
|
|
581 } |
|
|
582 |
|
581
|
583 // Format a list in neat columns. Mostly stolen from GNU ls. This |
|
|
584 // should maybe be in utils.cc. |
|
|
585 |
|
526
|
586 ostrstream& |
|
|
587 list_in_columns (ostrstream& os, char **list) |
|
|
588 { |
|
|
589 // Compute the maximum name length. |
|
|
590 |
|
|
591 int max_name_length = 0; |
|
|
592 int total_names = 0; |
|
|
593 for (char **names = list; *names; names++) |
|
|
594 { |
|
|
595 total_names++; |
|
|
596 int name_length = strlen (*names); |
|
|
597 if (name_length > max_name_length) |
|
|
598 max_name_length = name_length; |
|
|
599 } |
|
|
600 |
|
|
601 // Allow at least two spaces between names. |
|
|
602 |
|
|
603 max_name_length += 2; |
|
|
604 |
|
|
605 // Calculate the maximum number of columns that will fit. |
|
|
606 |
|
|
607 int line_length = terminal_columns (); |
|
|
608 int cols = line_length / max_name_length; |
|
|
609 if (cols == 0) |
|
|
610 cols = 1; |
|
|
611 |
|
|
612 // Calculate the number of rows that will be in each column except |
|
|
613 // possibly for a short column on the right. |
|
|
614 |
|
|
615 int rows = total_names / cols + (total_names % cols != 0); |
|
|
616 |
|
|
617 // Recalculate columns based on rows. |
|
|
618 |
|
|
619 cols = total_names / rows + (total_names % rows != 0); |
|
|
620 |
|
|
621 names = list; |
|
|
622 int count; |
|
|
623 for (int row = 0; row < rows; row++) |
|
|
624 { |
|
|
625 count = row; |
|
|
626 int pos = 0; |
|
|
627 |
|
|
628 // Print the next row. |
|
|
629 |
|
|
630 while (1) |
|
|
631 { |
|
|
632 os << *(names + count); |
|
|
633 int name_length = strlen (*(names + count)); |
|
|
634 |
|
|
635 count += rows; |
|
|
636 if (count >= total_names) |
|
|
637 break; |
|
|
638 |
|
|
639 int spaces_to_pad = max_name_length - name_length; |
|
|
640 for (int i = 0; i < spaces_to_pad; i++) |
|
|
641 os << " "; |
|
|
642 pos += max_name_length; |
|
|
643 } |
|
|
644 os << "\n"; |
|
|
645 } |
|
|
646 |
|
|
647 return os; |
|
|
648 } |
|
|
649 |
|
581
|
650 // See if the given file is in the path. |
|
|
651 |
|
526
|
652 char * |
|
686
|
653 search_path_for_file (const char *path, const char *name) |
|
|
654 { |
|
|
655 char *retval = 0; |
|
|
656 |
|
|
657 char *tmp = kpse_path_search (path, name, kpathsea_true); |
|
|
658 |
|
|
659 if (tmp) |
|
|
660 { |
|
|
661 retval = make_absolute (tmp, the_current_working_directory); |
|
|
662 free (tmp); |
|
|
663 } |
|
|
664 |
|
|
665 return retval; |
|
|
666 } |
|
|
667 |
|
|
668 DEFUN ("file_in_path", Ffile_in_pat, Sfile_in_path, 3, 1, |
|
|
669 "file_in_path (PATH, NAME)") |
|
|
670 { |
|
|
671 Octave_object retval; |
|
|
672 |
|
|
673 DEFINE_ARGV("file_in_path"); |
|
|
674 |
|
|
675 if (argc == 3) |
|
|
676 { |
|
|
677 char *fname = search_path_for_file (argv[1], argv[2]); |
|
|
678 |
|
|
679 if (fname) |
|
|
680 retval = fname; |
|
|
681 else |
|
|
682 retval = Matrix (); |
|
|
683 } |
|
|
684 else |
|
|
685 print_usage ("file_in_path"); |
|
|
686 |
|
|
687 DELETE_ARGV; |
|
|
688 |
|
|
689 return retval; |
|
|
690 } |
|
|
691 |
|
|
692 |
|
|
693 char * |
|
526
|
694 file_in_path (const char *name, const char *suffix) |
|
|
695 { |
|
|
696 char *retval = 0; |
|
|
697 |
|
679
|
698 char *nm = strsave (name); |
|
686
|
699 |
|
526
|
700 if (suffix) |
|
|
701 { |
|
|
702 char *tmp = nm; |
|
|
703 nm = strconcat (tmp, suffix); |
|
|
704 delete [] tmp; |
|
|
705 } |
|
|
706 |
|
|
707 if (! the_current_working_directory) |
|
|
708 get_working_directory ("file_in_path"); |
|
|
709 |
|
686
|
710 retval = search_path_for_file (user_pref.loadpath, nm); |
|
526
|
711 |
|
686
|
712 delete [] nm; |
|
526
|
713 |
|
|
714 return retval; |
|
|
715 } |
|
|
716 |
|
581
|
717 // See if there is an function file in the path. If so, return the |
|
|
718 // full path to the file. |
|
|
719 |
|
526
|
720 char * |
|
|
721 fcn_file_in_path (const char *name) |
|
|
722 { |
|
908
|
723 if (name) |
|
|
724 { |
|
|
725 int len = strlen (name); |
|
|
726 |
|
|
727 if (name [len - 2] == '.' && name [len - 1] == 'm') |
|
|
728 return file_in_path (name, ""); |
|
|
729 else |
|
|
730 return file_in_path (name, ".m"); |
|
|
731 } |
|
|
732 else |
|
|
733 return 0; |
|
526
|
734 } |
|
|
735 |
|
581
|
736 // See if there is an octave file in the path. If so, return the |
|
|
737 // full path to the file. |
|
|
738 |
|
572
|
739 char * |
|
|
740 oct_file_in_path (const char *name) |
|
|
741 { |
|
908
|
742 if (name) |
|
|
743 { |
|
|
744 int len = strlen (name); |
|
|
745 |
|
|
746 if (name [len - 4] == '.' && name [len - 3] == 'o' |
|
|
747 && name [len - 2] == 'c' && name [len - 1] == 't') |
|
|
748 return file_in_path (name, ""); |
|
|
749 else |
|
|
750 return file_in_path (name, ".oct"); |
|
|
751 } |
|
|
752 else |
|
|
753 return 0; |
|
572
|
754 } |
|
|
755 |
|
801
|
756 char * |
|
|
757 undo_string_escape (char c) |
|
|
758 { |
|
|
759 static char retval[2]; |
|
|
760 retval[1] = '\0'; |
|
|
761 |
|
|
762 if (! c) |
|
|
763 return 0; |
|
|
764 |
|
|
765 switch (c) |
|
|
766 { |
|
|
767 case '\a': |
|
|
768 return "\\a"; |
|
|
769 |
|
|
770 case '\b': // backspace |
|
|
771 return "\\b"; |
|
|
772 |
|
|
773 case '\f': // formfeed |
|
|
774 return "\\f"; |
|
|
775 |
|
|
776 case '\n': // newline |
|
|
777 return "\\n"; |
|
|
778 |
|
|
779 case '\r': // carriage return |
|
|
780 return "\\r"; |
|
|
781 |
|
|
782 case '\t': // horizontal tab |
|
|
783 return "\\t"; |
|
|
784 |
|
|
785 case '\v': // vertical tab |
|
|
786 return "\\v"; |
|
|
787 |
|
|
788 case '\\': // backslash |
|
|
789 return "\\\\"; |
|
|
790 |
|
|
791 case '"': // double quote |
|
|
792 return "\\\""; |
|
|
793 |
|
|
794 default: |
|
|
795 retval[0] = c; |
|
|
796 return retval; |
|
|
797 } |
|
|
798 } |
|
|
799 |
|
|
800 char * |
|
|
801 undo_string_escapes (char *s) |
|
|
802 { |
|
|
803 ostrstream buf; |
|
|
804 |
|
|
805 char *t; |
|
|
806 while (t = undo_string_escape (*s++)) |
|
|
807 buf << t; |
|
|
808 buf << ends; |
|
|
809 |
|
|
810 return buf.str (); |
|
|
811 } |
|
|
812 |
|
|
813 DEFUN ("undo_string_escapes", Fundo_string_escapes, |
|
|
814 Sundo_string_escapes, 1, 1, |
|
|
815 "undo_string_escapes (STRING)") |
|
|
816 { |
|
|
817 tree_constant retval; |
|
|
818 |
|
|
819 int nargin = args.length (); |
|
|
820 |
|
|
821 if (nargin == 1 && args(0).is_string ()) |
|
|
822 { |
|
|
823 char *str = undo_string_escapes (args(0).string_value ()); |
|
|
824 retval = str; |
|
|
825 delete [] str; |
|
|
826 } |
|
|
827 else |
|
|
828 print_usage ("undo_string_escapaes"); |
|
|
829 |
|
|
830 return retval; |
|
|
831 } |
|
|
832 |
|
572
|
833 /* |
|
1
|
834 ;;; Local Variables: *** |
|
|
835 ;;; mode: C++ *** |
|
|
836 ;;; page-delimiter: "^/\\*" *** |
|
|
837 ;;; End: *** |
|
|
838 */ |
