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1
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1 // utils.cc -*- C++ -*- |
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2 /* |
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3 |
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296
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4 Copyright (C) 1992, 1993, 1994 John W. Eaton |
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1
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 |
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22 */ |
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23 |
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24 /* |
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25 |
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400
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26 The 12 functions listed below were adapted from a similar functions |
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27 from GNU Bash, the Bourne Again SHell, copyright (C) 1987, 1989, 1991 |
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28 Free Software Foundation, Inc. |
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29 |
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30 polite_directory_format absolute_pathname |
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31 absolute_program base_pathname |
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32 read_octal sub_append_string |
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33 decode_prompt_string pathname_backup |
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34 make_absolute get_working_directory |
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320
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35 change_to_directory gethostname |
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1
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36 |
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37 */ |
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38 |
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240
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39 #ifdef HAVE_CONFIG_H |
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40 #include "config.h" |
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1
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41 #endif |
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42 |
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43 #include <sys/types.h> |
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44 #ifdef HAVE_UNISTD_H |
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45 #include <unistd.h> |
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46 #endif |
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47 #include <sys/param.h> |
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48 #include <setjmp.h> |
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49 #include <string.h> |
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50 #include <limits.h> |
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51 #include <iostream.h> |
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52 #include <strstream.h> |
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53 #include <fstream.h> |
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367
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54 |
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526
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55 #include <Complex.h> |
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287
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56 |
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57 #ifndef HAVE_STRNCASECMP |
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58 extern "C" |
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59 { |
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60 extern int strncasecmp (const char*, const char*, size_t); |
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61 } |
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62 #endif |
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63 |
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138
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64 extern "C" |
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65 { |
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66 #if defined (HAVE_TERMIOS_H) |
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67 #include <termios.h> |
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68 #elif defined (HAVE_TERMIO_H) |
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1
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69 #include <termio.h> |
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138
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70 #elif defined (HAVE_SGTTY_H) |
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1
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71 #include <sgtty.h> |
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72 #else |
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73 LOSE! LOSE! |
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74 #endif |
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75 |
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581
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76 #include <readline/tilde.h> |
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1
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77 } |
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78 |
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526
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79 // This mess suggested by the autoconf manual. |
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80 // unistd.h defines _POSIX_VERSION on POSIX.1 systems. |
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81 #if defined(DIRENT) || defined(_POSIX_VERSION) |
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82 #include <dirent.h> |
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83 #define NLENGTH(dirent) (strlen((dirent)->d_name)) |
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84 #else /* not (DIRENT or _POSIX_VERSION) */ |
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85 #define dirent direct |
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86 #define NLENGTH(dirent) ((dirent)->d_namlen) |
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87 #ifdef SYSNDIR |
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88 #include <sys/ndir.h> |
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89 #endif /* SYSNDIR */ |
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90 #ifdef SYSDIR |
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91 #include <sys/dir.h> |
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92 #endif /* SYSDIR */ |
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93 #ifdef NDIR |
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94 #include <ndir.h> |
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95 #endif /* NDIR */ |
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96 #endif /* not (DIRENT or _POSIX_VERSION) */ |
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97 |
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1
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98 #include "SLStack.h" |
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99 |
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100 #include "procstream.h" |
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101 #include "user-prefs.h" |
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102 #include "variables.h" |
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526
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103 #include "dirfns.h" |
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1
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104 #include "error.h" |
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628
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105 #include "gripes.h" |
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526
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106 #include "pager.h" |
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1
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107 #include "utils.h" |
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175
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108 #include "input.h" |
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1
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109 #include "octave.h" |
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526
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110 #include "oct-obj.h" |
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1
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111 #include "mappers.h" |
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112 #include "version.h" |
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113 #include "tree-const.h" |
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114 #include "unwind-prot.h" |
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115 #include "octave-hist.h" |
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116 |
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117 // Top level context (?) |
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118 extern jmp_buf toplevel; |
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119 |
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581
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120 // Save a string. |
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121 |
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1
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122 char * |
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123 strsave (const char *s) |
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124 { |
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526
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125 if (! s) |
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126 return 0; |
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1
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127 |
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128 int len = strlen (s); |
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129 char *tmp = new char [len+1]; |
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130 tmp = strcpy (tmp, s); |
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131 return tmp; |
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132 } |
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133 |
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581
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134 // Concatenate two strings. |
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135 |
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1
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136 char * |
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137 strconcat (const char *s, const char *t) |
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138 { |
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139 int len = strlen (s) + strlen (t); |
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140 char *tmp = new char [len+1]; |
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141 strcpy (tmp, s); |
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142 return strcat (tmp, t); |
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143 } |
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144 |
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581
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145 // Throw away input until a given character is read. |
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146 |
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1
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147 void |
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148 discard_until (istream& stream, char character) |
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149 { |
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150 int c; |
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151 for (;;) |
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152 { |
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153 stream >> c; |
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154 if (c == EOF || c == character) |
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155 break; |
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156 } |
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157 if (c != EOF) |
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158 stream.putback ((char) c); |
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159 } |
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160 |
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607
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161 #if 0 |
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162 |
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163 // XXX UNTESTED XXX |
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164 |
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165 // Read input until a given character is read. Returns characters |
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166 // read in a new string that must be freed by the caller. |
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167 |
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168 char * |
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169 read_until (istream& stream, char character) |
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170 { |
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171 int grow_size = 8; |
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172 int limit = grow_size; |
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173 char *buf = new char [limit]; |
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174 char *bp = buf; |
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175 |
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176 get_more: |
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177 is.getline (bp, limit, character); |
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178 |
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179 if (is.gcount () == 0) |
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180 { |
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181 delete [] buf; |
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182 return 0; |
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183 } |
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184 |
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185 if (is.gcount () == limit && buf[limit-1] != '\0') |
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186 { |
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187 char *tmp = new char [limit + grow_size]; |
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188 strcpy (tmp, buf); |
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189 delete [] buf; |
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190 buf = tmp; |
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191 bp = tmp + limit - 1; |
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192 limit += grow_size; |
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193 grow_size *= 2; |
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194 goto get_more; |
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195 } |
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196 |
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197 return buf; |
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198 } |
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199 #endif |
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200 |
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1
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201 char ** |
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202 pathstring_to_vector (char *pathstring) |
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203 { |
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526
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204 static char **path = 0; |
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1
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205 |
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526
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206 if (pathstring) |
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1
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207 { |
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208 int nelem = 0; |
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240
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209 char *tmp_path = strsave (pathstring); |
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210 if (*tmp_path != '\0') |
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1
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211 { |
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212 nelem++; |
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240
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213 char *ptr = tmp_path; |
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1
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214 while (*ptr != '\0') |
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215 { |
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216 if (*ptr == ':') |
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217 nelem++; |
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218 ptr++; |
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219 } |
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220 } |
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221 |
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240
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222 char **foo = path; |
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223 while (foo && *foo) |
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244
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224 delete [] *foo++; |
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1
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225 delete [] path; |
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244
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226 |
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1
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227 path = new char * [nelem+1]; |
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526
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228 path[nelem] = 0; |
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1
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229 |
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230 int i = 0; |
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240
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231 char *ptr = tmp_path; |
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1
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232 while (i < nelem) |
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233 { |
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234 char *end = strchr (ptr, ':'); |
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526
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235 if (end) |
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1
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236 *end = '\0'; |
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237 char *result = tilde_expand (ptr); |
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238 path[i] = strsave (result); |
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239 free (result); |
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240 ptr = end + 1; |
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241 i++; |
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242 } |
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243 |
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240
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244 delete [] tmp_path; |
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1
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245 } |
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246 |
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247 return path; |
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248 } |
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249 |
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581
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250 // Return to the main command loop in octave.cc. |
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251 |
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189
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252 void |
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1
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253 jump_to_top_level (void) |
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254 { |
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255 run_all_unwind_protects (); |
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256 |
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257 longjmp (toplevel, 1); |
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258 } |
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259 |
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260 int |
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526
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261 almost_match (const char *std, const char *s, int min_match_len, |
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262 int case_sens) |
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1
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263 { |
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264 int stdlen = strlen (std); |
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265 int slen = strlen (s); |
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266 |
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267 return (slen <= stdlen |
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268 && slen >= min_match_len |
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287
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269 && (case_sens |
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270 ? (strncmp (std, s, slen) == 0) |
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271 : (strncasecmp (std, s, slen) == 0))); |
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272 } |
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273 |
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581
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274 // Ugh. |
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275 |
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287
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276 int |
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277 keyword_almost_match (const char **std, int *min_len, const char *s, |
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278 int min_toks_to_match, int max_toks) |
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279 { |
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280 int status = 0; |
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281 int tok_count = 0; |
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282 int toks_matched = 0; |
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283 |
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526
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284 if (! s || *s == '\0' || max_toks < 1) |
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287
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285 return status; |
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286 |
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287 char *kw = strsave (s); |
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288 |
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289 char *t = kw; |
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290 while (*t != '\0') |
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291 { |
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292 if (*t == '\t') |
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293 *t = ' '; |
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294 t++; |
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295 } |
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296 |
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297 char *beg = kw; |
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298 while (*beg == ' ') |
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299 beg++; |
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300 |
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301 if (*beg == '\0') |
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302 return status; |
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303 |
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304 |
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305 char **to_match = new char * [max_toks + 1]; |
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526
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306 const char **s1 = std; |
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287
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307 char **s2 = to_match; |
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308 |
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526
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309 if (! s1 || ! s2) |
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287
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310 goto done; |
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311 |
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312 s2[tok_count] = beg; |
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313 char *end; |
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526
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314 while ((end = strchr (beg, ' ')) != 0) |
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287
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315 { |
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316 *end = '\0'; |
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317 beg = end + 1; |
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318 |
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319 while (*beg == ' ') |
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320 beg++; |
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321 |
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322 if (*beg == '\0') |
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323 break; |
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324 |
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325 tok_count++; |
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326 if (tok_count >= max_toks) |
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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 } |
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526
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331 s2[tok_count+1] = 0; |
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287
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332 |
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333 s2 = to_match; |
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334 |
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335 for (;;) |
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336 { |
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337 if (! almost_match (*s1, *s2, min_len[toks_matched], 0)) |
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338 goto done; |
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339 |
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340 toks_matched++; |
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341 |
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342 s1++; |
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343 s2++; |
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344 |
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345 if (! *s2) |
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346 { |
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347 status = (toks_matched >= min_toks_to_match); |
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348 goto done; |
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349 } |
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350 |
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351 if (! *s1) |
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352 goto done; |
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353 } |
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354 |
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355 done: |
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356 |
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357 delete [] kw; |
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358 delete [] to_match; |
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359 |
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360 return status; |
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1
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361 } |
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362 |
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363 char ** |
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338
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364 get_fcn_file_names (int& num, const char *dir, int no_suffix) |
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1
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365 { |
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366 static int num_max = 256; |
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367 char **retval = new char * [num_max]; |
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368 int i = 0; |
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369 |
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370 DIR *dirp = opendir (dir); |
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526
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371 if (dirp) |
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1
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372 { |
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373 struct dirent *entry; |
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526
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374 while ((entry = readdir (dirp)) != 0) |
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1
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375 { |
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376 int len = NLENGTH (entry); |
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377 if (len > 2 |
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378 && entry->d_name[len-2] == '.' |
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379 && entry->d_name[len-1] == 'm') |
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380 { |
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381 retval[i] = strsave (entry->d_name); |
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382 if (no_suffix) |
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383 retval[i][len-2] = '\0'; |
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384 |
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385 i++; |
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386 |
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387 if (i == num_max - 1) |
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388 { |
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244
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389 // Reallocate the array. Only copy pointers, not the strings they |
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390 // point to, then only delete the original array of pointers, and not |
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391 // the strings they point to. |
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392 |
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1
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393 num_max += 256; |
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394 char **tmp = new char * [num_max]; |
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395 for (int j = 0; j < i; j++) |
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396 tmp[j] = retval[j]; |
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397 |
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244
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398 delete [] retval; |
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399 |
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1
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400 retval = tmp; |
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401 } |
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402 } |
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403 } |
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106
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404 closedir (dirp); |
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1
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405 } |
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406 |
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526
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407 retval[i] = 0; |
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1
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408 num = i; |
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409 |
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410 return retval; |
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411 } |
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412 |
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413 char ** |
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338
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414 get_fcn_file_names (int& num, int no_suffix) |
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1
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415 { |
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416 static int num_max = 1024; |
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417 char **retval = new char * [num_max]; |
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418 int i = 0; |
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419 |
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420 char **path = pathstring_to_vector (user_pref.loadpath); |
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421 |
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422 char **ptr = path; |
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526
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423 if (ptr) |
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1
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424 { |
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526
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425 while (*ptr) |
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1
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426 { |
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427 int tmp_num; |
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338
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428 char **names = get_fcn_file_names (tmp_num, *ptr, no_suffix); |
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1
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429 |
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430 if (i + tmp_num >= num_max - 1) |
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431 { |
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244
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432 // Reallocate the array. Only copy pointers, not the strings they |
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433 // point to, then only delete the original array of pointers, and not |
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434 // the strings they point to. |
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435 |
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1
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436 num_max += 1024; |
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437 char **tmp = new char * [num_max]; |
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438 for (int j = 0; j < i; j++) |
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439 tmp[j] = retval[j]; |
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440 |
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244
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441 delete [] retval; |
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442 |
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1
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443 retval = tmp; |
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444 } |
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445 |
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446 int k = 0; |
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447 while (k < tmp_num) |
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448 retval[i++] = names[k++]; |
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449 |
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450 ptr++; |
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451 } |
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452 } |
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453 |
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526
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454 retval[i] = 0; |
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1
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455 num = i; |
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456 |
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457 return retval; |
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458 } |
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459 |
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460 int |
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461 NINT (double x) |
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462 { |
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463 if (x > INT_MAX) |
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464 return INT_MAX; |
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465 else if (x < INT_MIN) |
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466 return INT_MIN; |
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467 else |
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468 return (x > 0) ? ((int) (x + 0.5)) : ((int) (x - 0.5)); |
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469 } |
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470 |
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471 double |
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472 D_NINT (double x) |
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473 { |
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474 if (xisinf (x) || xisnan (x)) |
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475 return x; |
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476 else |
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477 return floor (x + 0.5); |
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478 } |
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479 |
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526
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480 // XXX FIXME XXX -- put these in some file, and make them extern. |
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481 |
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482 static int |
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483 all_strings (const Octave_object& args) |
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|
484 { |
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485 int n = args.length (); |
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486 for (int i = 1; i < n; i++) |
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610
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487 if (! args(i).is_string ()) |
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526
|
488 return 0; |
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489 return 1; |
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490 } |
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491 |
|
|
492 char ** |
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578
|
493 make_argv (const Octave_object& args, const char *fcn_name) |
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526
|
494 { |
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495 char **argv = 0; |
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|
496 if (all_strings (args)) |
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|
497 { |
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|
498 int n = args.length (); |
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|
499 argv = new char * [n + 1]; |
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578
|
500 argv[0] = strsave (fcn_name); |
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526
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501 for (int i = 1; i < n; i++) |
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502 argv[i] = strsave (args(i).string_value ()); |
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503 } |
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504 else |
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578
|
505 error ("%s: expecting all arguments to be strings", fcn_name); |
|
526
|
506 |
|
|
507 return argv; |
|
|
508 } |
|
|
509 |
|
628
|
510 int |
|
|
511 empty_arg (const char *name, int nr, int nc) |
|
|
512 { |
|
|
513 int is_empty = 0; |
|
|
514 |
|
|
515 if (nr == 0 || nc == 0) |
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|
516 { |
|
|
517 is_empty = 0; |
|
|
518 |
|
|
519 int flag = user_pref.propagate_empty_matrices; |
|
|
520 |
|
|
521 if (flag < 0) |
|
|
522 gripe_empty_arg (name, 0); |
|
|
523 else if (flag > 0) |
|
|
524 gripe_empty_arg (name, 1); |
|
|
525 } |
|
|
526 |
|
|
527 return is_empty; |
|
|
528 } |
|
|
529 |
|
581
|
530 // Format a list in neat columns. Mostly stolen from GNU ls. This |
|
|
531 // should maybe be in utils.cc. |
|
|
532 |
|
526
|
533 ostrstream& |
|
|
534 list_in_columns (ostrstream& os, char **list) |
|
|
535 { |
|
|
536 // Compute the maximum name length. |
|
|
537 |
|
|
538 int max_name_length = 0; |
|
|
539 int total_names = 0; |
|
|
540 for (char **names = list; *names; names++) |
|
|
541 { |
|
|
542 total_names++; |
|
|
543 int name_length = strlen (*names); |
|
|
544 if (name_length > max_name_length) |
|
|
545 max_name_length = name_length; |
|
|
546 } |
|
|
547 |
|
|
548 // Allow at least two spaces between names. |
|
|
549 |
|
|
550 max_name_length += 2; |
|
|
551 |
|
|
552 // Calculate the maximum number of columns that will fit. |
|
|
553 |
|
|
554 int line_length = terminal_columns (); |
|
|
555 int cols = line_length / max_name_length; |
|
|
556 if (cols == 0) |
|
|
557 cols = 1; |
|
|
558 |
|
|
559 // Calculate the number of rows that will be in each column except |
|
|
560 // possibly for a short column on the right. |
|
|
561 |
|
|
562 int rows = total_names / cols + (total_names % cols != 0); |
|
|
563 |
|
|
564 // Recalculate columns based on rows. |
|
|
565 |
|
|
566 cols = total_names / rows + (total_names % rows != 0); |
|
|
567 |
|
|
568 names = list; |
|
|
569 int count; |
|
|
570 for (int row = 0; row < rows; row++) |
|
|
571 { |
|
|
572 count = row; |
|
|
573 int pos = 0; |
|
|
574 |
|
|
575 // Print the next row. |
|
|
576 |
|
|
577 while (1) |
|
|
578 { |
|
|
579 os << *(names + count); |
|
|
580 int name_length = strlen (*(names + count)); |
|
|
581 |
|
|
582 count += rows; |
|
|
583 if (count >= total_names) |
|
|
584 break; |
|
|
585 |
|
|
586 int spaces_to_pad = max_name_length - name_length; |
|
|
587 for (int i = 0; i < spaces_to_pad; i++) |
|
|
588 os << " "; |
|
|
589 pos += max_name_length; |
|
|
590 } |
|
|
591 os << "\n"; |
|
|
592 } |
|
|
593 |
|
|
594 return os; |
|
|
595 } |
|
|
596 |
|
581
|
597 // See if the given file is in the path. |
|
|
598 |
|
526
|
599 char * |
|
|
600 file_in_path (const char *name, const char *suffix) |
|
|
601 { |
|
|
602 char *retval = 0; |
|
|
603 |
|
|
604 char *nm = strconcat ("/", name); |
|
|
605 if (suffix) |
|
|
606 { |
|
|
607 char *tmp = nm; |
|
|
608 nm = strconcat (tmp, suffix); |
|
|
609 delete [] tmp; |
|
|
610 } |
|
|
611 |
|
|
612 if (! the_current_working_directory) |
|
|
613 get_working_directory ("file_in_path"); |
|
|
614 |
|
|
615 char **path = pathstring_to_vector (user_pref.loadpath); |
|
|
616 |
|
|
617 char **ptr = path; |
|
|
618 if (ptr) |
|
|
619 { |
|
|
620 while (*ptr) |
|
|
621 { |
|
|
622 char *tmp = strconcat (*ptr, nm); |
|
|
623 char *p = make_absolute (tmp, the_current_working_directory); |
|
|
624 delete [] tmp; |
|
|
625 ifstream in_file (p); |
|
|
626 if (in_file) |
|
|
627 { |
|
|
628 in_file.close (); |
|
|
629 retval = p; |
|
|
630 goto done; |
|
|
631 } |
|
|
632 delete [] p; |
|
|
633 ptr++; |
|
|
634 } |
|
|
635 } |
|
|
636 |
|
|
637 done: |
|
|
638 delete [] nm; |
|
|
639 return retval; |
|
|
640 } |
|
|
641 |
|
581
|
642 // See if there is an function file in the path. If so, return the |
|
|
643 // full path to the file. |
|
|
644 |
|
526
|
645 char * |
|
|
646 fcn_file_in_path (const char *name) |
|
|
647 { |
|
|
648 return file_in_path (name, ".m"); |
|
|
649 } |
|
|
650 |
|
581
|
651 // See if there is an octave file in the path. If so, return the |
|
|
652 // full path to the file. |
|
|
653 |
|
572
|
654 char * |
|
|
655 oct_file_in_path (const char *name) |
|
|
656 { |
|
|
657 return file_in_path (name, ".oct"); |
|
|
658 } |
|
|
659 |
|
|
660 /* |
|
1
|
661 ;;; Local Variables: *** |
|
|
662 ;;; mode: C++ *** |
|
|
663 ;;; page-delimiter: "^/\\*" *** |
|
|
664 ;;; End: *** |
|
|
665 */ |
