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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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526
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105 #include "pager.h" |
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1
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106 #include "utils.h" |
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175
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107 #include "input.h" |
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1
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108 #include "octave.h" |
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526
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109 #include "oct-obj.h" |
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1
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110 #include "mappers.h" |
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111 #include "version.h" |
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112 #include "tree-const.h" |
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113 #include "unwind-prot.h" |
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114 #include "octave-hist.h" |
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115 |
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116 // Top level context (?) |
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117 extern jmp_buf toplevel; |
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118 |
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581
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119 // Save a string. |
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120 |
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1
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121 char * |
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122 strsave (const char *s) |
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123 { |
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526
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124 if (! s) |
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125 return 0; |
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1
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126 |
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127 int len = strlen (s); |
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128 char *tmp = new char [len+1]; |
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129 tmp = strcpy (tmp, s); |
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130 return tmp; |
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131 } |
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132 |
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581
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133 // Concatenate two strings. |
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134 |
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1
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135 char * |
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136 strconcat (const char *s, const char *t) |
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137 { |
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138 int len = strlen (s) + strlen (t); |
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139 char *tmp = new char [len+1]; |
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140 strcpy (tmp, s); |
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141 return strcat (tmp, t); |
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142 } |
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143 |
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581
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144 // Throw away input until a given character is read. |
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145 |
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1
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146 void |
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147 discard_until (istream& stream, char character) |
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148 { |
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149 int c; |
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150 for (;;) |
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151 { |
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152 stream >> c; |
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153 if (c == EOF || c == character) |
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154 break; |
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155 } |
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156 if (c != EOF) |
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157 stream.putback ((char) c); |
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158 } |
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159 |
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607
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160 #if 0 |
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161 |
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162 // XXX UNTESTED XXX |
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163 |
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164 // Read input until a given character is read. Returns characters |
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165 // read in a new string that must be freed by the caller. |
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166 |
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167 char * |
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168 read_until (istream& stream, char character) |
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169 { |
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170 int grow_size = 8; |
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171 int limit = grow_size; |
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172 char *buf = new char [limit]; |
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173 char *bp = buf; |
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174 |
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175 get_more: |
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176 is.getline (bp, limit, character); |
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177 |
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178 if (is.gcount () == 0) |
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179 { |
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180 delete [] buf; |
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181 return 0; |
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182 } |
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183 |
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184 if (is.gcount () == limit && buf[limit-1] != '\0') |
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185 { |
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186 char *tmp = new char [limit + grow_size]; |
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187 strcpy (tmp, buf); |
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188 delete [] buf; |
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189 buf = tmp; |
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190 bp = tmp + limit - 1; |
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191 limit += grow_size; |
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192 grow_size *= 2; |
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193 goto get_more; |
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194 } |
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195 |
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196 return buf; |
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197 } |
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198 #endif |
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199 |
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1
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200 char ** |
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201 pathstring_to_vector (char *pathstring) |
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202 { |
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526
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203 static char **path = 0; |
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1
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204 |
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526
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205 if (pathstring) |
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1
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206 { |
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207 int nelem = 0; |
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240
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208 char *tmp_path = strsave (pathstring); |
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209 if (*tmp_path != '\0') |
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1
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210 { |
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211 nelem++; |
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240
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212 char *ptr = tmp_path; |
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1
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213 while (*ptr != '\0') |
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214 { |
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215 if (*ptr == ':') |
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216 nelem++; |
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217 ptr++; |
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218 } |
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219 } |
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220 |
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240
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221 char **foo = path; |
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222 while (foo && *foo) |
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244
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223 delete [] *foo++; |
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1
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224 delete [] path; |
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244
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225 |
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1
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226 path = new char * [nelem+1]; |
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526
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227 path[nelem] = 0; |
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1
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228 |
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229 int i = 0; |
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240
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230 char *ptr = tmp_path; |
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1
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231 while (i < nelem) |
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232 { |
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233 char *end = strchr (ptr, ':'); |
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526
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234 if (end) |
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1
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235 *end = '\0'; |
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236 char *result = tilde_expand (ptr); |
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237 path[i] = strsave (result); |
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238 free (result); |
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239 ptr = end + 1; |
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240 i++; |
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241 } |
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242 |
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240
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243 delete [] tmp_path; |
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1
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244 } |
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245 |
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246 return path; |
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247 } |
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248 |
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581
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249 // Return to the main command loop in octave.cc. |
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250 |
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189
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251 void |
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1
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252 jump_to_top_level (void) |
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253 { |
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254 run_all_unwind_protects (); |
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255 |
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256 longjmp (toplevel, 1); |
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257 } |
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258 |
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259 int |
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526
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260 almost_match (const char *std, const char *s, int min_match_len, |
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261 int case_sens) |
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1
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262 { |
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263 int stdlen = strlen (std); |
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264 int slen = strlen (s); |
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265 |
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266 return (slen <= stdlen |
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267 && slen >= min_match_len |
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287
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268 && (case_sens |
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269 ? (strncmp (std, s, slen) == 0) |
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270 : (strncasecmp (std, s, slen) == 0))); |
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271 } |
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272 |
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581
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273 // Ugh. |
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274 |
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287
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275 int |
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276 keyword_almost_match (const char **std, int *min_len, const char *s, |
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277 int min_toks_to_match, int max_toks) |
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278 { |
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279 int status = 0; |
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280 int tok_count = 0; |
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281 int toks_matched = 0; |
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282 |
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526
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283 if (! s || *s == '\0' || max_toks < 1) |
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287
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284 return status; |
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285 |
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286 char *kw = strsave (s); |
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287 |
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288 char *t = kw; |
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289 while (*t != '\0') |
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290 { |
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291 if (*t == '\t') |
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292 *t = ' '; |
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293 t++; |
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294 } |
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295 |
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296 char *beg = kw; |
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297 while (*beg == ' ') |
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298 beg++; |
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299 |
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300 if (*beg == '\0') |
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301 return status; |
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302 |
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303 |
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304 char **to_match = new char * [max_toks + 1]; |
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526
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305 const char **s1 = std; |
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287
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306 char **s2 = to_match; |
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307 |
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526
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308 if (! s1 || ! s2) |
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287
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309 goto done; |
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310 |
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311 s2[tok_count] = beg; |
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312 char *end; |
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526
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313 while ((end = strchr (beg, ' ')) != 0) |
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287
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314 { |
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315 *end = '\0'; |
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316 beg = end + 1; |
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317 |
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318 while (*beg == ' ') |
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319 beg++; |
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320 |
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321 if (*beg == '\0') |
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322 break; |
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323 |
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324 tok_count++; |
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325 if (tok_count >= max_toks) |
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326 goto done; |
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327 |
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328 s2[tok_count] = beg; |
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329 } |
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526
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330 s2[tok_count+1] = 0; |
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287
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331 |
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332 s2 = to_match; |
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333 |
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334 for (;;) |
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335 { |
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336 if (! almost_match (*s1, *s2, min_len[toks_matched], 0)) |
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337 goto done; |
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338 |
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339 toks_matched++; |
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340 |
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341 s1++; |
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342 s2++; |
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343 |
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344 if (! *s2) |
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345 { |
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346 status = (toks_matched >= min_toks_to_match); |
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347 goto done; |
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348 } |
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349 |
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350 if (! *s1) |
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351 goto done; |
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352 } |
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353 |
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354 done: |
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355 |
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356 delete [] kw; |
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357 delete [] to_match; |
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358 |
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359 return status; |
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1
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360 } |
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361 |
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362 char ** |
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338
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363 get_fcn_file_names (int& num, const char *dir, int no_suffix) |
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1
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364 { |
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365 static int num_max = 256; |
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366 char **retval = new char * [num_max]; |
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367 int i = 0; |
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368 |
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369 DIR *dirp = opendir (dir); |
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526
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370 if (dirp) |
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1
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371 { |
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372 struct dirent *entry; |
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526
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373 while ((entry = readdir (dirp)) != 0) |
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1
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374 { |
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375 int len = NLENGTH (entry); |
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376 if (len > 2 |
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377 && entry->d_name[len-2] == '.' |
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378 && entry->d_name[len-1] == 'm') |
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379 { |
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380 retval[i] = strsave (entry->d_name); |
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381 if (no_suffix) |
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382 retval[i][len-2] = '\0'; |
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383 |
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384 i++; |
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385 |
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386 if (i == num_max - 1) |
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387 { |
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244
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388 // Reallocate the array. Only copy pointers, not the strings they |
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389 // point to, then only delete the original array of pointers, and not |
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390 // the strings they point to. |
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391 |
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1
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392 num_max += 256; |
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393 char **tmp = new char * [num_max]; |
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394 for (int j = 0; j < i; j++) |
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395 tmp[j] = retval[j]; |
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396 |
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244
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397 delete [] retval; |
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398 |
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1
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399 retval = tmp; |
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400 } |
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401 } |
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402 } |
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106
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403 closedir (dirp); |
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1
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404 } |
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405 |
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526
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406 retval[i] = 0; |
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1
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407 num = i; |
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408 |
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409 return retval; |
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410 } |
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411 |
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412 char ** |
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338
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413 get_fcn_file_names (int& num, int no_suffix) |
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1
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414 { |
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415 static int num_max = 1024; |
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416 char **retval = new char * [num_max]; |
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417 int i = 0; |
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418 |
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419 char **path = pathstring_to_vector (user_pref.loadpath); |
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420 |
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421 char **ptr = path; |
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526
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422 if (ptr) |
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1
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423 { |
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526
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424 while (*ptr) |
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1
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425 { |
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426 int tmp_num; |
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338
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427 char **names = get_fcn_file_names (tmp_num, *ptr, no_suffix); |
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1
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428 |
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429 if (i + tmp_num >= num_max - 1) |
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430 { |
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244
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431 // Reallocate the array. Only copy pointers, not the strings they |
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432 // point to, then only delete the original array of pointers, and not |
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433 // the strings they point to. |
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434 |
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1
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435 num_max += 1024; |
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436 char **tmp = new char * [num_max]; |
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437 for (int j = 0; j < i; j++) |
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438 tmp[j] = retval[j]; |
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439 |
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244
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440 delete [] retval; |
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441 |
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1
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442 retval = tmp; |
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443 } |
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444 |
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445 int k = 0; |
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446 while (k < tmp_num) |
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447 retval[i++] = names[k++]; |
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448 |
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449 ptr++; |
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450 } |
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451 } |
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452 |
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526
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453 retval[i] = 0; |
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1
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454 num = i; |
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455 |
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456 return retval; |
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457 } |
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458 |
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459 int |
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460 NINT (double x) |
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461 { |
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462 if (x > INT_MAX) |
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463 return INT_MAX; |
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464 else if (x < INT_MIN) |
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465 return INT_MIN; |
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466 else |
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467 return (x > 0) ? ((int) (x + 0.5)) : ((int) (x - 0.5)); |
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468 } |
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469 |
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470 double |
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471 D_NINT (double x) |
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472 { |
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473 if (xisinf (x) || xisnan (x)) |
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474 return x; |
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475 else |
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476 return floor (x + 0.5); |
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477 } |
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478 |
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526
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479 // XXX FIXME XXX -- put these in some file, and make them extern. |
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480 |
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481 static int |
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482 all_strings (const Octave_object& args) |
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483 { |
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484 int n = args.length (); |
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485 for (int i = 1; i < n; i++) |
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486 if (! args(i).is_string_type ()) |
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487 return 0; |
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488 return 1; |
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489 } |
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490 |
|
|
491 char ** |
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578
|
492 make_argv (const Octave_object& args, const char *fcn_name) |
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526
|
493 { |
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494 char **argv = 0; |
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|
495 if (all_strings (args)) |
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496 { |
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497 int n = args.length (); |
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|
498 argv = new char * [n + 1]; |
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578
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499 argv[0] = strsave (fcn_name); |
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526
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500 for (int i = 1; i < n; i++) |
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501 argv[i] = strsave (args(i).string_value ()); |
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502 } |
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503 else |
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578
|
504 error ("%s: expecting all arguments to be strings", fcn_name); |
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526
|
505 |
|
|
506 return argv; |
|
|
507 } |
|
|
508 |
|
581
|
509 // Format a list in neat columns. Mostly stolen from GNU ls. This |
|
|
510 // should maybe be in utils.cc. |
|
|
511 |
|
526
|
512 ostrstream& |
|
|
513 list_in_columns (ostrstream& os, char **list) |
|
|
514 { |
|
|
515 // Compute the maximum name length. |
|
|
516 |
|
|
517 int max_name_length = 0; |
|
|
518 int total_names = 0; |
|
|
519 for (char **names = list; *names; names++) |
|
|
520 { |
|
|
521 total_names++; |
|
|
522 int name_length = strlen (*names); |
|
|
523 if (name_length > max_name_length) |
|
|
524 max_name_length = name_length; |
|
|
525 } |
|
|
526 |
|
|
527 // Allow at least two spaces between names. |
|
|
528 |
|
|
529 max_name_length += 2; |
|
|
530 |
|
|
531 // Calculate the maximum number of columns that will fit. |
|
|
532 |
|
|
533 int line_length = terminal_columns (); |
|
|
534 int cols = line_length / max_name_length; |
|
|
535 if (cols == 0) |
|
|
536 cols = 1; |
|
|
537 |
|
|
538 // Calculate the number of rows that will be in each column except |
|
|
539 // possibly for a short column on the right. |
|
|
540 |
|
|
541 int rows = total_names / cols + (total_names % cols != 0); |
|
|
542 |
|
|
543 // Recalculate columns based on rows. |
|
|
544 |
|
|
545 cols = total_names / rows + (total_names % rows != 0); |
|
|
546 |
|
|
547 names = list; |
|
|
548 int count; |
|
|
549 for (int row = 0; row < rows; row++) |
|
|
550 { |
|
|
551 count = row; |
|
|
552 int pos = 0; |
|
|
553 |
|
|
554 // Print the next row. |
|
|
555 |
|
|
556 while (1) |
|
|
557 { |
|
|
558 os << *(names + count); |
|
|
559 int name_length = strlen (*(names + count)); |
|
|
560 |
|
|
561 count += rows; |
|
|
562 if (count >= total_names) |
|
|
563 break; |
|
|
564 |
|
|
565 int spaces_to_pad = max_name_length - name_length; |
|
|
566 for (int i = 0; i < spaces_to_pad; i++) |
|
|
567 os << " "; |
|
|
568 pos += max_name_length; |
|
|
569 } |
|
|
570 os << "\n"; |
|
|
571 } |
|
|
572 |
|
|
573 return os; |
|
|
574 } |
|
|
575 |
|
581
|
576 // See if the given file is in the path. |
|
|
577 |
|
526
|
578 char * |
|
|
579 file_in_path (const char *name, const char *suffix) |
|
|
580 { |
|
|
581 char *retval = 0; |
|
|
582 |
|
|
583 char *nm = strconcat ("/", name); |
|
|
584 if (suffix) |
|
|
585 { |
|
|
586 char *tmp = nm; |
|
|
587 nm = strconcat (tmp, suffix); |
|
|
588 delete [] tmp; |
|
|
589 } |
|
|
590 |
|
|
591 if (! the_current_working_directory) |
|
|
592 get_working_directory ("file_in_path"); |
|
|
593 |
|
|
594 char **path = pathstring_to_vector (user_pref.loadpath); |
|
|
595 |
|
|
596 char **ptr = path; |
|
|
597 if (ptr) |
|
|
598 { |
|
|
599 while (*ptr) |
|
|
600 { |
|
|
601 char *tmp = strconcat (*ptr, nm); |
|
|
602 char *p = make_absolute (tmp, the_current_working_directory); |
|
|
603 delete [] tmp; |
|
|
604 ifstream in_file (p); |
|
|
605 if (in_file) |
|
|
606 { |
|
|
607 in_file.close (); |
|
|
608 retval = p; |
|
|
609 goto done; |
|
|
610 } |
|
|
611 delete [] p; |
|
|
612 ptr++; |
|
|
613 } |
|
|
614 } |
|
|
615 |
|
|
616 done: |
|
|
617 delete [] nm; |
|
|
618 return retval; |
|
|
619 } |
|
|
620 |
|
581
|
621 // See if there is an function file in the path. If so, return the |
|
|
622 // full path to the file. |
|
|
623 |
|
526
|
624 char * |
|
|
625 fcn_file_in_path (const char *name) |
|
|
626 { |
|
|
627 return file_in_path (name, ".m"); |
|
|
628 } |
|
|
629 |
|
581
|
630 // See if there is an octave file in the path. If so, return the |
|
|
631 // full path to the file. |
|
|
632 |
|
572
|
633 char * |
|
|
634 oct_file_in_path (const char *name) |
|
|
635 { |
|
|
636 return file_in_path (name, ".oct"); |
|
|
637 } |
|
|
638 |
|
|
639 /* |
|
1
|
640 ;;; Local Variables: *** |
|
|
641 ;;; mode: C++ *** |
|
|
642 ;;; page-delimiter: "^/\\*" *** |
|
|
643 ;;; End: *** |
|
|
644 */ |
