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1
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1 /* |
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2 |
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2847
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3 Copyright (C) 1996, 1997 John W. Eaton |
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1
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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1315
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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1
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20 |
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21 */ |
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22 |
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240
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23 #ifdef HAVE_CONFIG_H |
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1192
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24 #include <config.h> |
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1
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25 #endif |
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26 |
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1343
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27 #include <climits> |
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1346
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28 #include <cstring> |
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1343
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29 |
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3503
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30 #include <fstream> |
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31 #include <iostream> |
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32 #include <strstream> |
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1728
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33 #include <string> |
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34 |
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1350
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35 #ifdef HAVE_UNISTD_H |
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2442
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36 #ifdef HAVE_SYS_TYPES_H |
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1
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37 #include <sys/types.h> |
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2442
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38 #endif |
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1
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39 #include <unistd.h> |
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40 #endif |
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367
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41 |
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3566
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42 // Include setjmp.h, not csetjmp since the latter might only define |
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43 // the ANSI standard C interface. |
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44 |
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45 #include <setjmp.h> |
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46 |
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138
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47 #if defined (HAVE_TERMIOS_H) |
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48 #include <termios.h> |
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49 #elif defined (HAVE_TERMIO_H) |
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1
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50 #include <termio.h> |
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138
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51 #elif defined (HAVE_SGTTY_H) |
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1
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52 #include <sgtty.h> |
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53 #else |
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54 LOSE! LOSE! |
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55 #endif |
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56 |
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57 #include "SLStack.h" |
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58 |
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3040
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59 #include "dir-ops.h" |
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60 #include "file-ops.h" |
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2926
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61 #include "file-stat.h" |
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1651
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62 #include "oct-cmplx.h" |
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2926
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63 #include "oct-env.h" |
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3040
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64 #include "pathsearch.h" |
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1755
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65 #include "str-vec.h" |
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1651
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66 |
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2492
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67 #include <defaults.h> |
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1352
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68 #include "defun.h" |
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69 #include "dirfns.h" |
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70 #include "error.h" |
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71 #include "gripes.h" |
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72 #include "input.h" |
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1742
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73 #include "oct-hist.h" |
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1750
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74 #include "oct-obj.h" |
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1352
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75 #include "pager.h" |
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1690
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76 #include "sysdep.h" |
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1750
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77 #include "toplev.h" |
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1
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78 #include "unwind-prot.h" |
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1352
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79 #include "utils.h" |
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80 #include "variables.h" |
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1
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81 |
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3354
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82 // Should expressions like ones (-1, 5) result in an empty matrix or |
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83 // an error? A positive value means yes. A negative value means |
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84 // yes, but print a warning message. Zero means it should be |
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85 // considered an error. |
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86 static int Vtreat_neg_dim_as_zero; |
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87 |
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1
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88 // Top level context (?) |
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89 extern jmp_buf toplevel; |
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90 |
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581
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91 // Return to the main command loop in octave.cc. |
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92 |
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3350
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93 void |
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1
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94 jump_to_top_level (void) |
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95 { |
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2985
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96 unwind_protect::run_all (); |
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1
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97 |
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98 longjmp (toplevel, 1); |
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99 } |
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100 |
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101 int |
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3523
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102 almost_match (const std::string& std, const std::string& s, int min_match_len, |
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526
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103 int case_sens) |
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1
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104 { |
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1755
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105 int stdlen = std.length (); |
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106 int slen = s.length (); |
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1
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107 |
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108 return (slen <= stdlen |
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109 && slen >= min_match_len |
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287
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110 && (case_sens |
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1755
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111 ? (strncmp (std.c_str (), s.c_str (), slen) == 0) |
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3350
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112 : (octave_strncasecmp (std.c_str (), s.c_str (), slen) == 0))); |
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287
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113 } |
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114 |
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581
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115 // Ugh. |
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116 |
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287
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117 int |
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3523
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118 keyword_almost_match (const char * const *std, int *min_len, const std::string& s, |
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287
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119 int min_toks_to_match, int max_toks) |
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120 { |
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121 int status = 0; |
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122 int tok_count = 0; |
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123 int toks_matched = 0; |
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124 |
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1755
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125 if (s.empty () || max_toks < 1) |
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287
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126 return status; |
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127 |
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1755
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128 char *kw = strsave (s.c_str ()); |
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287
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129 |
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130 char *t = kw; |
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131 while (*t != '\0') |
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132 { |
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133 if (*t == '\t') |
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134 *t = ' '; |
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135 t++; |
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136 } |
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137 |
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138 char *beg = kw; |
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139 while (*beg == ' ') |
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140 beg++; |
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141 |
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142 if (*beg == '\0') |
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143 return status; |
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144 |
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145 |
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3072
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146 const char **to_match = new const char * [max_toks + 1]; |
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147 const char * const *s1 = std; |
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148 const char **s2 = to_match; |
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287
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149 |
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526
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150 if (! s1 || ! s2) |
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287
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151 goto done; |
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152 |
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153 s2[tok_count] = beg; |
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154 char *end; |
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526
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155 while ((end = strchr (beg, ' ')) != 0) |
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287
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156 { |
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157 *end = '\0'; |
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158 beg = end + 1; |
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159 |
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160 while (*beg == ' ') |
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161 beg++; |
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162 |
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163 if (*beg == '\0') |
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164 break; |
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165 |
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166 tok_count++; |
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167 if (tok_count >= max_toks) |
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168 goto done; |
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169 |
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170 s2[tok_count] = beg; |
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171 } |
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526
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172 s2[tok_count+1] = 0; |
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287
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173 |
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174 s2 = to_match; |
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175 |
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176 for (;;) |
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177 { |
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178 if (! almost_match (*s1, *s2, min_len[toks_matched], 0)) |
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179 goto done; |
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180 |
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181 toks_matched++; |
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182 |
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183 s1++; |
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184 s2++; |
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185 |
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186 if (! *s2) |
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187 { |
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188 status = (toks_matched >= min_toks_to_match); |
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189 goto done; |
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190 } |
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191 |
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192 if (! *s1) |
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193 goto done; |
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194 } |
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195 |
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196 done: |
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197 |
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198 delete [] kw; |
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199 delete [] to_match; |
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200 |
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201 return status; |
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1
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202 } |
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203 |
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2234
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204 // Return non-zero if either NR or NC is zero. Return -1 if this |
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205 // should be considered fatal; return 1 if this is ok. |
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206 |
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207 int |
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208 empty_arg (const char *name, int nr, int nc) |
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209 { |
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210 int is_empty = 0; |
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211 |
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212 if (nr == 0 || nc == 0) |
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213 { |
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214 int flag = Vpropagate_empty_matrices; |
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215 |
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216 if (flag < 0) |
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217 { |
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218 gripe_empty_arg (name, 0); |
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219 is_empty = 1; |
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220 } |
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221 else if (flag == 0) |
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222 { |
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223 gripe_empty_arg (name, 1); |
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224 is_empty = -1; |
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225 } |
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226 else |
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227 is_empty = 1; |
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228 } |
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229 |
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230 return is_empty; |
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231 } |
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232 |
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581
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233 // See if the given file is in the path. |
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234 |
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3536
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235 std::string |
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3523
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236 search_path_for_file (const std::string& path, const std::string& name) |
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686
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237 { |
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3174
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238 dir_path p (path); |
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686
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239 |
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2926
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240 return octave_env::make_absolute (p.find (name), octave_env::getcwd ()); |
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686
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241 } |
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242 |
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3195
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243 DEFUN (file_in_loadpath, args, , |
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3446
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244 "-*- texinfo -*-\n\ |
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245 @deftypefn {Built-in Function} {} file_in_loadpath (@var{name})\n\ |
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3195
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246 \n\ |
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3446
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247 Look up @var{name} in Octave's @code{LOADPATH}.\n\ |
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248 @end deftypefn\n\ |
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249 @seealso{file_in_path}") |
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3195
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250 { |
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251 octave_value_list retval; |
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252 |
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253 int argc = args.length () + 1; |
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254 |
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255 string_vector argv = args.make_argv ("file_in_loadpath"); |
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256 |
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257 if (error_state) |
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258 return retval; |
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259 |
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3225
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260 if (argc == 2) |
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3195
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261 retval = octave_env::make_absolute (Vload_path_dir_path.find (argv[1]), |
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262 octave_env::getcwd ()); |
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263 else |
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264 print_usage ("file_in_loadpath"); |
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265 |
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266 return retval; |
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267 } |
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268 |
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1957
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269 DEFUN (file_in_path, args, , |
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3301
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270 "-*- texinfo -*-\n\ |
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271 @deftypefn {Built-in Function} {} file_in_path (@var{path}, @var{file})\n\ |
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272 Return the absolute name name of @var{file} if it can be found in\n\ |
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273 @var{path}. The value of @var{path} should be a colon-separated list of\n\ |
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274 directories in the format described for the built-in variable\n\ |
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275 @code{LOADPATH}.\n\ |
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276 \n\ |
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277 If the file cannot be found in the path, an empty matrix is returned.\n\ |
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278 For example,\n\ |
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279 \n\ |
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280 @example\n\ |
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281 file_in_path (LOADPATH, \"nargchk.m\")\n\ |
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282 @result{} \"@value{OCTAVEHOME}/share/octave/2.0/m/general/nargchk.m\"\n\ |
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283 @end example\n\ |
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284 @end deftypefn") |
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686
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285 { |
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2086
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286 octave_value_list retval; |
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686
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287 |
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1755
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288 int argc = args.length () + 1; |
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289 |
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1968
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290 string_vector argv = args.make_argv ("file_in_path"); |
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1755
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291 |
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292 if (error_state) |
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293 return retval; |
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686
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294 |
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295 if (argc == 3) |
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296 { |
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3523
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297 std::string fname = search_path_for_file (argv[1], argv[2]); |
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686
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298 |
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1755
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299 if (fname.empty ()) |
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300 retval = Matrix (); |
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301 else |
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686
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302 retval = fname; |
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303 } |
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304 else |
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305 print_usage ("file_in_path"); |
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306 |
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307 return retval; |
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308 } |
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309 |
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3536
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310 std::string |
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3523
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311 file_in_path (const std::string& name, const std::string& suffix) |
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526
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312 { |
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3523
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313 std::string nm = name; |
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526
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314 |
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1755
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315 if (! suffix.empty ()) |
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316 nm.append (suffix); |
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686
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317 |
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3174
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318 return octave_env::make_absolute (Vload_path_dir_path.find (nm), |
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319 octave_env::getcwd ()); |
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526
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320 } |
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321 |
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581
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322 // See if there is an function file in the path. If so, return the |
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323 // full path to the file. |
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324 |
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3536
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325 std::string |
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3523
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326 fcn_file_in_path (const std::string& name) |
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526
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327 { |
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3523
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328 std::string retval; |
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908
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329 |
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1755
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330 int len = name.length (); |
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331 |
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332 if (len > 0) |
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333 { |
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334 if (len > 2 && name [len - 2] == '.' && name [len - 1] == 'm') |
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335 retval = file_in_path (name, ""); |
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908
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336 else |
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1755
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337 retval = file_in_path (name, ".m"); |
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908
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338 } |
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1755
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339 |
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340 return retval; |
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526
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341 } |
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342 |
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581
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343 // See if there is an octave file in the path. If so, return the |
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344 // full path to the file. |
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345 |
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3536
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346 std::string |
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3523
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347 oct_file_in_path (const std::string& name) |
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572
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348 { |
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3523
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349 std::string retval; |
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908
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350 |
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1755
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351 int len = name.length (); |
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352 |
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353 if (len > 0) |
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354 { |
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355 if (len > 2 && name [len - 4] == '.' && name [len - 3] == 'o' |
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908
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356 && name [len - 2] == 'c' && name [len - 1] == 't') |
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1755
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357 retval = file_in_path (name, ""); |
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908
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358 else |
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1755
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359 retval = file_in_path (name, ".oct"); |
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908
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360 } |
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1755
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361 |
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362 return retval; |
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572
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363 } |
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364 |
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3103
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365 // Replace backslash escapes in a string with the real values. |
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366 |
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3536
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367 std::string |
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3523
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368 do_string_escapes (const std::string& s) |
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3103
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369 { |
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3523
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370 std::string retval; |
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3103
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371 |
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372 size_t i = 0; |
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373 size_t j = 0; |
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374 size_t len = s.length (); |
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375 |
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376 retval.resize (len); |
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377 |
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378 while (j < len) |
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379 { |
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380 if (s[j] == '\\' && j+1 < len) |
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381 { |
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382 switch (s[++j]) |
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383 { |
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384 case 'a': |
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385 retval[i] = '\a'; |
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386 break; |
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387 |
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388 case 'b': // backspace |
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389 retval[i] = '\b'; |
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390 break; |
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391 |
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392 case 'f': // formfeed |
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393 retval[i] = '\f'; |
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394 break; |
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395 |
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396 case 'n': // newline |
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397 retval[i] = '\n'; |
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398 break; |
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399 |
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400 case 'r': // carriage return |
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401 retval[i] = '\r'; |
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402 break; |
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403 |
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404 case 't': // horizontal tab |
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405 retval[i] = '\t'; |
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406 break; |
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407 |
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408 case 'v': // vertical tab |
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409 retval[i] = '\v'; |
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410 break; |
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411 |
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412 case '\\': // backslash |
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413 retval[i] = '\\'; |
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414 break; |
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415 |
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416 case '\'': // quote |
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417 retval[i] = '\''; |
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418 break; |
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419 |
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420 case '"': // double quote |
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421 retval[i] = '"'; |
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422 break; |
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423 |
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424 default: |
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425 warning ("unrecognized escape sequence `\\%c' --\ |
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426 converting to `%c'", s[j], s[j]); |
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427 retval[i] = s[j]; |
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428 break; |
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429 } |
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430 } |
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431 else |
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432 { |
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433 retval[i] = s[j]; |
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434 } |
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435 |
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436 i++; |
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437 j++; |
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438 } |
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439 |
|
3105
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440 retval.resize (i); |
|
3103
|
441 |
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442 return retval; |
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443 } |
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444 |
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445 DEFUN (do_string_escapes, args, , |
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3446
|
446 "-*- texinfo -*-\n\ |
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|
447 @deftypefn {Built-in Function} {} do_string_escapes (@var{string})\n\ |
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|
448 Convert special characters in @var{string} to their escaped forms.\n\ |
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449 @end deftypefn") |
|
3103
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450 { |
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451 octave_value retval; |
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452 |
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453 int nargin = args.length (); |
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454 |
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455 if (nargin == 1) |
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456 { |
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457 if (args(0).is_string ()) |
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458 retval = do_string_escapes (args(0).string_value ()); |
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459 else |
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|
460 error ("do_string_escapes: argument must be a string"); |
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461 } |
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462 else |
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463 print_usage ("do_string_escapes"); |
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|
464 |
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465 return retval; |
|
|
466 } |
|
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467 |
|
1755
|
468 const char * |
|
801
|
469 undo_string_escape (char c) |
|
|
470 { |
|
|
471 if (! c) |
|
1755
|
472 return ""; |
|
801
|
473 |
|
|
474 switch (c) |
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|
475 { |
|
|
476 case '\a': |
|
|
477 return "\\a"; |
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|
478 |
|
|
479 case '\b': // backspace |
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|
480 return "\\b"; |
|
|
481 |
|
|
482 case '\f': // formfeed |
|
|
483 return "\\f"; |
|
|
484 |
|
|
485 case '\n': // newline |
|
|
486 return "\\n"; |
|
|
487 |
|
|
488 case '\r': // carriage return |
|
|
489 return "\\r"; |
|
|
490 |
|
|
491 case '\t': // horizontal tab |
|
|
492 return "\\t"; |
|
|
493 |
|
|
494 case '\v': // vertical tab |
|
|
495 return "\\v"; |
|
|
496 |
|
|
497 case '\\': // backslash |
|
|
498 return "\\\\"; |
|
|
499 |
|
|
500 case '"': // double quote |
|
|
501 return "\\\""; |
|
|
502 |
|
|
503 default: |
|
1755
|
504 { |
|
|
505 static char retval[2]; |
|
|
506 retval[0] = c; |
|
|
507 retval[1] = '\0'; |
|
|
508 return retval; |
|
|
509 } |
|
801
|
510 } |
|
|
511 } |
|
|
512 |
|
3536
|
513 std::string |
|
3523
|
514 undo_string_escapes (const std::string& s) |
|
801
|
515 { |
|
3523
|
516 std::string retval; |
|
801
|
517 |
|
1755
|
518 for (size_t i = 0; i < s.length (); i++) |
|
|
519 retval.append (undo_string_escape (s[i])); |
|
801
|
520 |
|
1755
|
521 return retval; |
|
801
|
522 } |
|
|
523 |
|
1957
|
524 DEFUN (undo_string_escapes, args, , |
|
3361
|
525 "-*- texinfo -*-\n\ |
|
|
526 @deftypefn {Built-in Function} {} undo_string_escapes (@var{s})\n\ |
|
|
527 Converts special characters in strings back to their escaped forms. For\n\ |
|
|
528 example, the expression\n\ |
|
|
529 \n\ |
|
|
530 @example\n\ |
|
|
531 bell = \"\\a\";\n\ |
|
|
532 @end example\n\ |
|
|
533 \n\ |
|
|
534 @noindent\n\ |
|
|
535 assigns the value of the alert character (control-g, ASCII code 7) to\n\ |
|
|
536 the string variable @code{bell}. If this string is printed, the\n\ |
|
|
537 system will ring the terminal bell (if it is possible). This is\n\ |
|
|
538 normally the desired outcome. However, sometimes it is useful to be\n\ |
|
|
539 able to print the original representation of the string, with the\n\ |
|
|
540 special characters replaced by their escape sequences. For example,\n\ |
|
|
541 \n\ |
|
|
542 @example\n\ |
|
|
543 octave:13> undo_string_escapes (bell)\n\ |
|
|
544 ans = \\a\n\ |
|
|
545 @end example\n\ |
|
|
546 \n\ |
|
|
547 @noindent\n\ |
|
|
548 replaces the unprintable alert character with its printable\n\ |
|
|
549 representation.\n\ |
|
|
550 @end deftypefn") |
|
801
|
551 { |
|
2086
|
552 octave_value retval; |
|
801
|
553 |
|
|
554 int nargin = args.length (); |
|
|
555 |
|
3103
|
556 if (nargin == 1) |
|
|
557 { |
|
|
558 if (args(0).is_string ()) |
|
|
559 retval = undo_string_escapes (args(0).string_value ()); |
|
|
560 else |
|
|
561 error ("undo_string_escapes: argument must be a string"); |
|
|
562 } |
|
801
|
563 else |
|
1023
|
564 print_usage ("undo_string_escapes"); |
|
801
|
565 |
|
|
566 return retval; |
|
|
567 } |
|
|
568 |
|
2285
|
569 static void |
|
3523
|
570 warn_old_style_preference (bool val, const std::string& sval) |
|
2285
|
571 { |
|
|
572 warning |
|
|
573 ("preference of \"%s\" is obsolete -- use numeric value of %d instead", |
|
|
574 sval.c_str (), (val ? 1 : 0)); |
|
|
575 } |
|
|
576 |
|
2204
|
577 // Check the value of a string variable to see if it it's ok to do |
|
|
578 // something. |
|
|
579 // |
|
|
580 // return of 1 => always ok. |
|
|
581 // return of 0 => never ok. |
|
|
582 // return of -1 => ok, but give me warning (default). |
|
|
583 |
|
|
584 int |
|
3523
|
585 check_preference (const std::string& var) |
|
2204
|
586 { |
|
|
587 int pref = -1; |
|
|
588 |
|
3523
|
589 std::string val = builtin_string_variable (var); |
|
2204
|
590 |
|
|
591 if (val.empty ()) |
|
|
592 { |
|
|
593 double dval = 0; |
|
|
594 if (builtin_real_scalar_variable (var, dval)) |
|
|
595 pref = NINT (dval); |
|
|
596 } |
|
|
597 else |
|
|
598 { |
|
3565
|
599 if (val == "yes" || val == "true") |
|
2285
|
600 { |
|
|
601 warn_old_style_preference (true, val); |
|
|
602 pref = 1; |
|
|
603 } |
|
3565
|
604 else if (val == "never" || val == "no" || val == "false") |
|
2285
|
605 { |
|
|
606 warn_old_style_preference (false, val); |
|
|
607 pref = 0; |
|
|
608 } |
|
2204
|
609 } |
|
|
610 |
|
|
611 return pref; |
|
|
612 } |
|
|
613 |
|
3354
|
614 static void |
|
|
615 check_dimensions (int& nr, int& nc, const char *warnfor) |
|
|
616 { |
|
|
617 if (nr < 0 || nc < 0) |
|
|
618 { |
|
|
619 if (Vtreat_neg_dim_as_zero) |
|
|
620 { |
|
|
621 nr = (nr < 0) ? 0 : nr; |
|
|
622 nc = (nc < 0) ? 0 : nc; |
|
|
623 |
|
|
624 if (Vtreat_neg_dim_as_zero < 0) |
|
|
625 warning ("%s: converting negative dimension to zero", |
|
|
626 warnfor); |
|
|
627 } |
|
|
628 else |
|
|
629 error ("%s: can't create a matrix with negative dimensions", |
|
|
630 warnfor); |
|
|
631 } |
|
|
632 } |
|
|
633 |
|
|
634 void |
|
|
635 get_dimensions (const octave_value& a, const char *warn_for, |
|
|
636 int& nr, int& nc) |
|
|
637 { |
|
|
638 if (a.is_scalar_type ()) |
|
|
639 { |
|
|
640 nr = nc = a.nint_value (); |
|
|
641 } |
|
|
642 else |
|
|
643 { |
|
|
644 nr = a.rows (); |
|
|
645 nc = a.columns (); |
|
|
646 |
|
|
647 if ((nr == 1 && nc == 2) || (nr == 2 && nc == 1)) |
|
|
648 { |
|
3419
|
649 Array<double> v = a.vector_value (); |
|
3354
|
650 |
|
|
651 if (error_state) |
|
|
652 return; |
|
|
653 |
|
|
654 nr = NINT (v (0)); |
|
|
655 nc = NINT (v (1)); |
|
|
656 } |
|
|
657 else |
|
|
658 warning ("%s (A): use %s (size (A)) instead", warn_for, warn_for); |
|
|
659 } |
|
|
660 |
|
|
661 check_dimensions (nr, nc, warn_for); // May set error_state. |
|
|
662 } |
|
|
663 |
|
|
664 void |
|
|
665 get_dimensions (const octave_value& a, const octave_value& b, |
|
|
666 const char *warn_for, int& nr, int& nc) |
|
|
667 { |
|
|
668 nr = a.is_empty () ? 0 : a.nint_value (); |
|
|
669 nc = b.is_empty () ? 0 : b.nint_value (); |
|
|
670 |
|
|
671 if (error_state) |
|
|
672 error ("%s: expecting two scalar arguments", warn_for); |
|
|
673 else |
|
|
674 check_dimensions (nr, nc, warn_for); // May set error_state. |
|
|
675 } |
|
|
676 |
|
3620
|
677 extern int |
|
3622
|
678 octave_format (std::ostream& os, const char *fmt, ...) |
|
3620
|
679 { |
|
|
680 int retval = -1; |
|
|
681 |
|
|
682 va_list args; |
|
|
683 va_start (args, fmt); |
|
|
684 |
|
|
685 retval = octave_vformat (os, fmt, args); |
|
|
686 |
|
|
687 va_end (args); |
|
|
688 |
|
|
689 return retval; |
|
|
690 } |
|
|
691 |
|
|
692 extern int |
|
3622
|
693 octave_vformat (std::ostream& os, const char *fmt, va_list args) |
|
3620
|
694 { |
|
|
695 int retval = -1; |
|
|
696 |
|
|
697 #if defined (__GNUG__) |
|
|
698 |
|
|
699 ostrstream buf; |
|
|
700 |
|
|
701 buf.vform (fmt, args); |
|
|
702 |
|
|
703 buf << ends; |
|
|
704 |
|
|
705 char *s = buf.str (); |
|
|
706 |
|
3621
|
707 os << s; |
|
|
708 |
|
3620
|
709 retval = strlen (s); |
|
|
710 |
|
3621
|
711 delete [] s; |
|
3620
|
712 |
|
|
713 #else |
|
|
714 |
|
|
715 char *s = octave_vsnprintf (fmt, args); |
|
|
716 |
|
|
717 if (s) |
|
|
718 { |
|
|
719 os << s; |
|
|
720 |
|
|
721 retval = strlen (s); |
|
3621
|
722 |
|
|
723 free (s); |
|
3620
|
724 } |
|
|
725 |
|
|
726 #endif |
|
|
727 |
|
|
728 return retval; |
|
|
729 } |
|
|
730 |
|
3354
|
731 static int |
|
|
732 treat_neg_dim_as_zero (void) |
|
|
733 { |
|
|
734 Vtreat_neg_dim_as_zero = check_preference ("treat_neg_dim_as_zero"); |
|
|
735 |
|
|
736 return 0; |
|
|
737 } |
|
|
738 |
|
|
739 void |
|
|
740 symbols_of_utils (void) |
|
|
741 { |
|
|
742 DEFVAR (treat_neg_dim_as_zero, 0.0, treat_neg_dim_as_zero, |
|
3369
|
743 "-*- texinfo -*-\n\ |
|
|
744 @defvr {Built-in Variable} treat_neg_dim_as_zero\n\ |
|
|
745 If the value of @code{treat_neg_dim_as_zero} is nonzero, expressions\n\ |
|
|
746 like\n\ |
|
|
747 \n\ |
|
|
748 @example\n\ |
|
|
749 eye (-1)\n\ |
|
|
750 @end example\n\ |
|
|
751 \n\ |
|
|
752 @noindent\n\ |
|
|
753 produce an empty matrix (i.e., row and column dimensions are zero).\n\ |
|
|
754 Otherwise, an error message is printed and control is returned to the\n\ |
|
|
755 top level. The default value is 0.\n\ |
|
|
756 @end defvr"); |
|
3354
|
757 } |
|
|
758 |
|
572
|
759 /* |
|
1
|
760 ;;; Local Variables: *** |
|
|
761 ;;; mode: C++ *** |
|
|
762 ;;; End: *** |
|
|
763 */ |
