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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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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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138
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49 #if defined (HAVE_TERMIOS_H) |
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50 #include <termios.h> |
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51 #elif defined (HAVE_TERMIO_H) |
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1
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52 #include <termio.h> |
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138
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53 #elif defined (HAVE_SGTTY_H) |
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1
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54 #include <sgtty.h> |
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55 #else |
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56 LOSE! LOSE! |
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57 #endif |
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58 |
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581
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59 #include <readline/tilde.h> |
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1
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60 } |
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61 |
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526
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62 // This mess suggested by the autoconf manual. |
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63 // unistd.h defines _POSIX_VERSION on POSIX.1 systems. |
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958
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64 #if defined (HAVE_DIRENT_H) || defined (_POSIX_VERSION) |
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526
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65 #include <dirent.h> |
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66 #define NLENGTH(dirent) (strlen((dirent)->d_name)) |
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958
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67 #else |
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526
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68 #define dirent direct |
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69 #define NLENGTH(dirent) ((dirent)->d_namlen) |
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958
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70 #if defined (HAVE_SYS_NDIR_H) |
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526
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71 #include <sys/ndir.h> |
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958
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72 #endif |
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73 #if defined (HAVE_SYS_DIR_H) |
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526
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74 #include <sys/dir.h> |
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958
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75 #endif |
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76 #if defined (HAVE_NDIR_H) |
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526
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77 #include <ndir.h> |
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958
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78 #endif |
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79 #endif |
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526
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80 |
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1
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81 #include "SLStack.h" |
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82 |
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1155
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83 #include "pathsearch.h" |
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1
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84 #include "procstream.h" |
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85 #include "user-prefs.h" |
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86 #include "variables.h" |
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526
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87 #include "dirfns.h" |
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686
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88 #include "defun.h" |
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1
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89 #include "error.h" |
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686
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90 #include "help.h" |
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628
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91 #include "gripes.h" |
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526
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92 #include "pager.h" |
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1
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93 #include "utils.h" |
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175
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94 #include "input.h" |
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1
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95 #include "octave.h" |
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526
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96 #include "oct-obj.h" |
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1
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97 #include "mappers.h" |
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98 #include "tree-const.h" |
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99 #include "unwind-prot.h" |
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100 #include "octave-hist.h" |
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101 |
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102 // Top level context (?) |
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103 extern jmp_buf toplevel; |
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104 |
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581
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105 // Save a string. |
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106 |
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1
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107 char * |
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108 strsave (const char *s) |
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109 { |
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526
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110 if (! s) |
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111 return 0; |
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1
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112 |
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113 int len = strlen (s); |
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114 char *tmp = new char [len+1]; |
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115 tmp = strcpy (tmp, s); |
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116 return tmp; |
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117 } |
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118 |
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581
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119 // Concatenate two strings. |
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120 |
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1
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121 char * |
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122 strconcat (const char *s, const char *t) |
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123 { |
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124 int len = strlen (s) + strlen (t); |
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125 char *tmp = new char [len+1]; |
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126 strcpy (tmp, s); |
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127 return strcat (tmp, t); |
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128 } |
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129 |
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581
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130 // Throw away input until a given character is read. |
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131 |
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1
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132 void |
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133 discard_until (istream& stream, char character) |
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134 { |
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135 int c; |
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136 for (;;) |
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137 { |
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138 stream >> c; |
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139 if (c == EOF || c == character) |
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140 break; |
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141 } |
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142 if (c != EOF) |
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143 stream.putback ((char) c); |
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144 } |
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145 |
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607
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146 #if 0 |
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147 |
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148 // XXX UNTESTED XXX |
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149 |
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150 // Read input until a given character is read. Returns characters |
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151 // read in a new string that must be freed by the caller. |
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152 |
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153 char * |
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154 read_until (istream& stream, char character) |
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155 { |
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156 int grow_size = 8; |
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157 int limit = grow_size; |
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158 char *buf = new char [limit]; |
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159 char *bp = buf; |
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160 |
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161 get_more: |
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162 is.getline (bp, limit, character); |
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163 |
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164 if (is.gcount () == 0) |
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165 { |
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166 delete [] buf; |
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167 return 0; |
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168 } |
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169 |
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170 if (is.gcount () == limit && buf[limit-1] != '\0') |
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171 { |
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172 char *tmp = new char [limit + grow_size]; |
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173 strcpy (tmp, buf); |
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174 delete [] buf; |
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175 buf = tmp; |
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176 bp = tmp + limit - 1; |
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177 limit += grow_size; |
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178 grow_size *= 2; |
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179 goto get_more; |
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180 } |
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181 |
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182 return buf; |
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183 } |
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184 #endif |
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185 |
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661
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186 // Get a temporary file name. |
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643
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187 |
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188 char * |
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189 octave_tmp_file_name (void) |
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190 { |
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662
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191 static char *retval = 0; |
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192 |
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193 if (retval) |
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194 free (retval); |
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195 |
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196 retval = tempnam (0, "oct-"); |
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197 |
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661
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198 if (! retval) |
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199 error ("can't open temporary file!"); |
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662
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200 |
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661
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201 return retval; |
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643
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202 } |
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203 |
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801
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204 DEFUN ("octave_tmp_file_name", Foctave_tmp_file_name, |
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205 Soctave_tmp_file_name, 0, 1, |
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206 "octave_tmp_file_name ()") |
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207 { |
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208 tree_constant retval; |
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209 |
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210 if (args.length () == 0) |
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211 retval = octave_tmp_file_name (); |
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212 else |
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213 print_usage ("octave_tmp_file_name"); |
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214 |
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215 return retval; |
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216 } |
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217 |
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1
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218 char ** |
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219 pathstring_to_vector (char *pathstring) |
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220 { |
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526
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221 static char **path = 0; |
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1
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222 |
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526
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223 if (pathstring) |
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1
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224 { |
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225 int nelem = 0; |
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240
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226 char *tmp_path = strsave (pathstring); |
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227 if (*tmp_path != '\0') |
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1
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228 { |
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229 nelem++; |
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240
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230 char *ptr = tmp_path; |
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1
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231 while (*ptr != '\0') |
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232 { |
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1104
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233 if (*ptr == SEPCHAR) |
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1
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234 nelem++; |
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235 ptr++; |
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236 } |
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237 } |
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238 |
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240
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239 char **foo = path; |
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240 while (foo && *foo) |
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244
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241 delete [] *foo++; |
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1
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242 delete [] path; |
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244
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243 |
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1
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244 path = new char * [nelem+1]; |
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526
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245 path[nelem] = 0; |
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1
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246 |
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247 int i = 0; |
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240
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248 char *ptr = tmp_path; |
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1
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249 while (i < nelem) |
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250 { |
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1104
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251 char *end = strchr (ptr, SEPCHAR); |
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526
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252 if (end) |
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1
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253 *end = '\0'; |
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254 char *result = tilde_expand (ptr); |
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255 path[i] = strsave (result); |
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256 free (result); |
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257 ptr = end + 1; |
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258 i++; |
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259 } |
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260 |
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240
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261 delete [] tmp_path; |
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1
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262 } |
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263 |
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264 return path; |
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265 } |
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266 |
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581
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267 // Return to the main command loop in octave.cc. |
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268 |
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189
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269 void |
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1
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270 jump_to_top_level (void) |
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271 { |
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272 run_all_unwind_protects (); |
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273 |
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274 longjmp (toplevel, 1); |
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275 } |
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276 |
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277 int |
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526
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278 almost_match (const char *std, const char *s, int min_match_len, |
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279 int case_sens) |
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1
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280 { |
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281 int stdlen = strlen (std); |
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282 int slen = strlen (s); |
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283 |
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284 return (slen <= stdlen |
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285 && slen >= min_match_len |
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287
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286 && (case_sens |
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287 ? (strncmp (std, s, slen) == 0) |
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288 : (strncasecmp (std, s, slen) == 0))); |
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289 } |
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290 |
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581
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291 // Ugh. |
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292 |
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287
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293 int |
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294 keyword_almost_match (const char **std, int *min_len, const char *s, |
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295 int min_toks_to_match, int max_toks) |
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296 { |
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297 int status = 0; |
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298 int tok_count = 0; |
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299 int toks_matched = 0; |
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300 |
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526
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301 if (! s || *s == '\0' || max_toks < 1) |
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287
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302 return status; |
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303 |
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304 char *kw = strsave (s); |
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305 |
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306 char *t = kw; |
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307 while (*t != '\0') |
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308 { |
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309 if (*t == '\t') |
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310 *t = ' '; |
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311 t++; |
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312 } |
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313 |
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314 char *beg = kw; |
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315 while (*beg == ' ') |
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316 beg++; |
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317 |
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318 if (*beg == '\0') |
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319 return status; |
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320 |
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321 |
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322 char **to_match = new char * [max_toks + 1]; |
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526
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323 const char **s1 = std; |
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287
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324 char **s2 = to_match; |
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325 |
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526
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326 if (! s1 || ! s2) |
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287
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327 goto done; |
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328 |
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329 s2[tok_count] = beg; |
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330 char *end; |
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526
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331 while ((end = strchr (beg, ' ')) != 0) |
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287
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332 { |
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333 *end = '\0'; |
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334 beg = end + 1; |
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335 |
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336 while (*beg == ' ') |
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337 beg++; |
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338 |
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339 if (*beg == '\0') |
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340 break; |
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341 |
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342 tok_count++; |
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343 if (tok_count >= max_toks) |
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344 goto done; |
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345 |
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346 s2[tok_count] = beg; |
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347 } |
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526
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348 s2[tok_count+1] = 0; |
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287
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349 |
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350 s2 = to_match; |
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351 |
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352 for (;;) |
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353 { |
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354 if (! almost_match (*s1, *s2, min_len[toks_matched], 0)) |
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355 goto done; |
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356 |
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357 toks_matched++; |
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358 |
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359 s1++; |
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360 s2++; |
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361 |
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362 if (! *s2) |
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363 { |
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364 status = (toks_matched >= min_toks_to_match); |
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365 goto done; |
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366 } |
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367 |
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368 if (! *s1) |
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369 goto done; |
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370 } |
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371 |
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372 done: |
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373 |
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374 delete [] kw; |
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375 delete [] to_match; |
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376 |
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377 return status; |
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1
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378 } |
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379 |
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380 char ** |
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338
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381 get_fcn_file_names (int& num, const char *dir, int no_suffix) |
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1
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382 { |
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383 static int num_max = 256; |
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384 char **retval = new char * [num_max]; |
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385 int i = 0; |
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386 |
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387 DIR *dirp = opendir (dir); |
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526
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388 if (dirp) |
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1
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389 { |
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390 struct dirent *entry; |
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526
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391 while ((entry = readdir (dirp)) != 0) |
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1
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392 { |
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393 int len = NLENGTH (entry); |
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826
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394 #ifdef WITH_DLD |
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395 if ((len > 2 |
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396 && entry->d_name[len-2] == '.' |
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397 && entry->d_name[len-1] == 'm') |
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398 || (len > 4 |
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399 && entry->d_name[len-4] == '.' |
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400 && entry->d_name[len-3] == 'o' |
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401 && entry->d_name[len-2] == 'c' |
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402 && entry->d_name[len-1] == 't')) |
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403 #else |
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1
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404 if (len > 2 |
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405 && entry->d_name[len-2] == '.' |
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406 && entry->d_name[len-1] == 'm') |
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826
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407 #endif |
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1
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408 { |
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409 retval[i] = strsave (entry->d_name); |
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410 if (no_suffix) |
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826
|
411 { |
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412 if (retval[i][len-1] == 'm') |
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413 retval[i][len-2] = '\0'; |
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414 else |
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415 retval[i][len-4] = '\0'; |
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416 } |
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1
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417 |
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418 i++; |
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419 |
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420 if (i == num_max - 1) |
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421 { |
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244
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422 // Reallocate the array. Only copy pointers, not the strings they |
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|
423 // point to, then only delete the original array of pointers, and not |
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424 // the strings they point to. |
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425 |
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1
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426 num_max += 256; |
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427 char **tmp = new char * [num_max]; |
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428 for (int j = 0; j < i; j++) |
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429 tmp[j] = retval[j]; |
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430 |
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244
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431 delete [] retval; |
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432 |
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1
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433 retval = tmp; |
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434 } |
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435 } |
|
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436 } |
|
106
|
437 closedir (dirp); |
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1
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438 } |
|
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439 |
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526
|
440 retval[i] = 0; |
|
1
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441 num = i; |
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442 |
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443 return retval; |
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444 } |
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445 |
|
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446 char ** |
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338
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447 get_fcn_file_names (int& num, int no_suffix) |
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1
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448 { |
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449 static int num_max = 1024; |
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450 char **retval = new char * [num_max]; |
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451 int i = 0; |
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452 |
|
679
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453 char *path_elt = kpse_path_element (user_pref.loadpath); |
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1
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454 |
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679
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455 while (path_elt) |
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1
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456 { |
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679
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457 str_llist_type *elt_dirs = kpse_element_dirs (path_elt); |
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458 |
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459 str_llist_elt_type *dir; |
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460 for (dir = *elt_dirs; dir; dir = STR_LLIST_NEXT (*dir)) |
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1
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461 { |
|
679
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462 char *elt_dir = STR_LLIST (*dir); |
|
1
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463 |
|
679
|
464 if (elt_dir) |
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1
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465 { |
|
679
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466 int tmp_num; |
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467 char **names = get_fcn_file_names (tmp_num, elt_dir, no_suffix); |
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468 |
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469 if (i + tmp_num >= num_max - 1) |
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470 { |
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244
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471 // Reallocate the array. Only copy pointers, not the strings they |
|
|
472 // point to, then only delete the original array of pointers, and not |
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|
473 // the strings they point to. |
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|
474 |
|
679
|
475 num_max += 1024; |
|
|
476 char **tmp = new char * [num_max]; |
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|
477 for (int j = 0; j < i; j++) |
|
|
478 tmp[j] = retval[j]; |
|
1
|
479 |
|
679
|
480 delete [] retval; |
|
244
|
481 |
|
679
|
482 retval = tmp; |
|
|
483 } |
|
1
|
484 |
|
679
|
485 int k = 0; |
|
|
486 while (k < tmp_num) |
|
|
487 retval[i++] = names[k++]; |
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|
488 } |
|
|
489 } |
|
1
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490 |
|
679
|
491 path_elt = kpse_path_element (0); |
|
1
|
492 } |
|
|
493 |
|
526
|
494 retval[i] = 0; |
|
1
|
495 num = i; |
|
|
496 |
|
|
497 return retval; |
|
|
498 } |
|
|
499 |
|
1086
|
500 // Convert X to the nearest integer value. Should not pass NaN to |
|
|
501 // this function. |
|
|
502 |
|
1
|
503 int |
|
|
504 NINT (double x) |
|
|
505 { |
|
|
506 if (x > INT_MAX) |
|
|
507 return INT_MAX; |
|
|
508 else if (x < INT_MIN) |
|
|
509 return INT_MIN; |
|
|
510 else |
|
|
511 return (x > 0) ? ((int) (x + 0.5)) : ((int) (x - 0.5)); |
|
|
512 } |
|
|
513 |
|
|
514 double |
|
|
515 D_NINT (double x) |
|
|
516 { |
|
|
517 if (xisinf (x) || xisnan (x)) |
|
|
518 return x; |
|
|
519 else |
|
|
520 return floor (x + 0.5); |
|
|
521 } |
|
|
522 |
|
526
|
523 // XXX FIXME XXX -- put these in some file, and make them extern. |
|
|
524 |
|
|
525 static int |
|
|
526 all_strings (const Octave_object& args) |
|
|
527 { |
|
|
528 int n = args.length (); |
|
712
|
529 for (int i = 0; i < n; i++) |
|
610
|
530 if (! args(i).is_string ()) |
|
526
|
531 return 0; |
|
|
532 return 1; |
|
|
533 } |
|
|
534 |
|
|
535 char ** |
|
578
|
536 make_argv (const Octave_object& args, const char *fcn_name) |
|
526
|
537 { |
|
|
538 char **argv = 0; |
|
|
539 if (all_strings (args)) |
|
|
540 { |
|
|
541 int n = args.length (); |
|
|
542 argv = new char * [n + 1]; |
|
578
|
543 argv[0] = strsave (fcn_name); |
|
712
|
544 for (int i = 0; i < n; i++) |
|
|
545 argv[i+1] = strsave (args(i).string_value ()); |
|
526
|
546 } |
|
|
547 else |
|
578
|
548 error ("%s: expecting all arguments to be strings", fcn_name); |
|
526
|
549 |
|
|
550 return argv; |
|
|
551 } |
|
|
552 |
|
719
|
553 // Return non-zero if either NR or NC is zero. Return -1 if this |
|
|
554 // should be considered fatal; return 1 if this is ok. |
|
|
555 |
|
628
|
556 int |
|
|
557 empty_arg (const char *name, int nr, int nc) |
|
|
558 { |
|
|
559 int is_empty = 0; |
|
|
560 |
|
|
561 if (nr == 0 || nc == 0) |
|
|
562 { |
|
|
563 int flag = user_pref.propagate_empty_matrices; |
|
|
564 |
|
|
565 if (flag < 0) |
|
636
|
566 { |
|
|
567 gripe_empty_arg (name, 0); |
|
|
568 is_empty = 1; |
|
|
569 } |
|
673
|
570 else if (flag == 0) |
|
636
|
571 { |
|
|
572 gripe_empty_arg (name, 1); |
|
|
573 is_empty = -1; |
|
|
574 } |
|
719
|
575 else |
|
|
576 is_empty = 1; |
|
628
|
577 } |
|
|
578 |
|
|
579 return is_empty; |
|
|
580 } |
|
|
581 |
|
581
|
582 // Format a list in neat columns. Mostly stolen from GNU ls. This |
|
|
583 // should maybe be in utils.cc. |
|
|
584 |
|
526
|
585 ostrstream& |
|
|
586 list_in_columns (ostrstream& os, char **list) |
|
|
587 { |
|
|
588 // Compute the maximum name length. |
|
|
589 |
|
|
590 int max_name_length = 0; |
|
|
591 int total_names = 0; |
|
|
592 for (char **names = list; *names; names++) |
|
|
593 { |
|
|
594 total_names++; |
|
|
595 int name_length = strlen (*names); |
|
|
596 if (name_length > max_name_length) |
|
|
597 max_name_length = name_length; |
|
|
598 } |
|
|
599 |
|
|
600 // Allow at least two spaces between names. |
|
|
601 |
|
|
602 max_name_length += 2; |
|
|
603 |
|
|
604 // Calculate the maximum number of columns that will fit. |
|
|
605 |
|
|
606 int line_length = terminal_columns (); |
|
|
607 int cols = line_length / max_name_length; |
|
|
608 if (cols == 0) |
|
|
609 cols = 1; |
|
|
610 |
|
|
611 // Calculate the number of rows that will be in each column except |
|
|
612 // possibly for a short column on the right. |
|
|
613 |
|
|
614 int rows = total_names / cols + (total_names % cols != 0); |
|
|
615 |
|
|
616 // Recalculate columns based on rows. |
|
|
617 |
|
|
618 cols = total_names / rows + (total_names % rows != 0); |
|
|
619 |
|
|
620 names = list; |
|
|
621 int count; |
|
|
622 for (int row = 0; row < rows; row++) |
|
|
623 { |
|
|
624 count = row; |
|
|
625 int pos = 0; |
|
|
626 |
|
|
627 // Print the next row. |
|
|
628 |
|
|
629 while (1) |
|
|
630 { |
|
|
631 os << *(names + count); |
|
|
632 int name_length = strlen (*(names + count)); |
|
|
633 |
|
|
634 count += rows; |
|
|
635 if (count >= total_names) |
|
|
636 break; |
|
|
637 |
|
|
638 int spaces_to_pad = max_name_length - name_length; |
|
|
639 for (int i = 0; i < spaces_to_pad; i++) |
|
|
640 os << " "; |
|
|
641 pos += max_name_length; |
|
|
642 } |
|
|
643 os << "\n"; |
|
|
644 } |
|
|
645 |
|
|
646 return os; |
|
|
647 } |
|
|
648 |
|
581
|
649 // See if the given file is in the path. |
|
|
650 |
|
526
|
651 char * |
|
686
|
652 search_path_for_file (const char *path, const char *name) |
|
|
653 { |
|
|
654 char *retval = 0; |
|
|
655 |
|
|
656 char *tmp = kpse_path_search (path, name, kpathsea_true); |
|
|
657 |
|
|
658 if (tmp) |
|
|
659 { |
|
|
660 retval = make_absolute (tmp, the_current_working_directory); |
|
|
661 free (tmp); |
|
|
662 } |
|
|
663 |
|
|
664 return retval; |
|
|
665 } |
|
|
666 |
|
912
|
667 DEFUN ("file_in_path", Ffile_in_path, Sfile_in_path, 3, 1, |
|
686
|
668 "file_in_path (PATH, NAME)") |
|
|
669 { |
|
|
670 Octave_object retval; |
|
|
671 |
|
|
672 DEFINE_ARGV("file_in_path"); |
|
|
673 |
|
|
674 if (argc == 3) |
|
|
675 { |
|
|
676 char *fname = search_path_for_file (argv[1], argv[2]); |
|
|
677 |
|
|
678 if (fname) |
|
|
679 retval = fname; |
|
|
680 else |
|
|
681 retval = Matrix (); |
|
|
682 } |
|
|
683 else |
|
|
684 print_usage ("file_in_path"); |
|
|
685 |
|
|
686 DELETE_ARGV; |
|
|
687 |
|
|
688 return retval; |
|
|
689 } |
|
|
690 |
|
|
691 |
|
|
692 char * |
|
526
|
693 file_in_path (const char *name, const char *suffix) |
|
|
694 { |
|
|
695 char *retval = 0; |
|
|
696 |
|
679
|
697 char *nm = strsave (name); |
|
686
|
698 |
|
526
|
699 if (suffix) |
|
|
700 { |
|
|
701 char *tmp = nm; |
|
|
702 nm = strconcat (tmp, suffix); |
|
|
703 delete [] tmp; |
|
|
704 } |
|
|
705 |
|
|
706 if (! the_current_working_directory) |
|
|
707 get_working_directory ("file_in_path"); |
|
|
708 |
|
686
|
709 retval = search_path_for_file (user_pref.loadpath, nm); |
|
526
|
710 |
|
686
|
711 delete [] nm; |
|
526
|
712 |
|
|
713 return retval; |
|
|
714 } |
|
|
715 |
|
581
|
716 // See if there is an function file in the path. If so, return the |
|
|
717 // full path to the file. |
|
|
718 |
|
526
|
719 char * |
|
|
720 fcn_file_in_path (const char *name) |
|
|
721 { |
|
908
|
722 if (name) |
|
|
723 { |
|
|
724 int len = strlen (name); |
|
|
725 |
|
|
726 if (name [len - 2] == '.' && name [len - 1] == 'm') |
|
|
727 return file_in_path (name, ""); |
|
|
728 else |
|
|
729 return file_in_path (name, ".m"); |
|
|
730 } |
|
|
731 else |
|
|
732 return 0; |
|
526
|
733 } |
|
|
734 |
|
581
|
735 // See if there is an octave file in the path. If so, return the |
|
|
736 // full path to the file. |
|
|
737 |
|
572
|
738 char * |
|
|
739 oct_file_in_path (const char *name) |
|
|
740 { |
|
908
|
741 if (name) |
|
|
742 { |
|
|
743 int len = strlen (name); |
|
|
744 |
|
|
745 if (name [len - 4] == '.' && name [len - 3] == 'o' |
|
|
746 && name [len - 2] == 'c' && name [len - 1] == 't') |
|
|
747 return file_in_path (name, ""); |
|
|
748 else |
|
|
749 return file_in_path (name, ".oct"); |
|
|
750 } |
|
|
751 else |
|
|
752 return 0; |
|
572
|
753 } |
|
|
754 |
|
801
|
755 char * |
|
|
756 undo_string_escape (char c) |
|
|
757 { |
|
|
758 static char retval[2]; |
|
|
759 retval[1] = '\0'; |
|
|
760 |
|
|
761 if (! c) |
|
|
762 return 0; |
|
|
763 |
|
|
764 switch (c) |
|
|
765 { |
|
|
766 case '\a': |
|
|
767 return "\\a"; |
|
|
768 |
|
|
769 case '\b': // backspace |
|
|
770 return "\\b"; |
|
|
771 |
|
|
772 case '\f': // formfeed |
|
|
773 return "\\f"; |
|
|
774 |
|
|
775 case '\n': // newline |
|
|
776 return "\\n"; |
|
|
777 |
|
|
778 case '\r': // carriage return |
|
|
779 return "\\r"; |
|
|
780 |
|
|
781 case '\t': // horizontal tab |
|
|
782 return "\\t"; |
|
|
783 |
|
|
784 case '\v': // vertical tab |
|
|
785 return "\\v"; |
|
|
786 |
|
|
787 case '\\': // backslash |
|
|
788 return "\\\\"; |
|
|
789 |
|
|
790 case '"': // double quote |
|
|
791 return "\\\""; |
|
|
792 |
|
|
793 default: |
|
|
794 retval[0] = c; |
|
|
795 return retval; |
|
|
796 } |
|
|
797 } |
|
|
798 |
|
|
799 char * |
|
|
800 undo_string_escapes (char *s) |
|
|
801 { |
|
|
802 ostrstream buf; |
|
|
803 |
|
|
804 char *t; |
|
|
805 while (t = undo_string_escape (*s++)) |
|
|
806 buf << t; |
|
|
807 buf << ends; |
|
|
808 |
|
|
809 return buf.str (); |
|
|
810 } |
|
|
811 |
|
|
812 DEFUN ("undo_string_escapes", Fundo_string_escapes, |
|
|
813 Sundo_string_escapes, 1, 1, |
|
|
814 "undo_string_escapes (STRING)") |
|
|
815 { |
|
|
816 tree_constant retval; |
|
|
817 |
|
|
818 int nargin = args.length (); |
|
|
819 |
|
|
820 if (nargin == 1 && args(0).is_string ()) |
|
|
821 { |
|
|
822 char *str = undo_string_escapes (args(0).string_value ()); |
|
|
823 retval = str; |
|
|
824 delete [] str; |
|
|
825 } |
|
|
826 else |
|
1023
|
827 print_usage ("undo_string_escapes"); |
|
801
|
828 |
|
|
829 return retval; |
|
|
830 } |
|
|
831 |
|
572
|
832 /* |
|
1
|
833 ;;; Local Variables: *** |
|
|
834 ;;; mode: C++ *** |
|
|
835 ;;; page-delimiter: "^/\\*" *** |
|
|
836 ;;; End: *** |
|
|
837 */ |
