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annotate src/shared-fcns.h @ 21213:f7d1050b9b53

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maint: Clean up various usages of #ifdef. * randmtzig.c: Use #ifdef rather than just #if. * EditControl.h : Use '#if ! defined' rather than '#ifndef' in guard block to match Octave style. * dialog.cc, settings-dialog.cc: Add FIXME notes about questionable use of #if mechanism. * file-editor-tab.cc, Array-b.cc, Array-ch.cc, Array-d.cc, Array-f.cc, Array-i.cc, Array-s.cc, MatrixType.h, quit.h, lo-sysdep.cc, lo-cutils.c, oct-alloc.h, oct-shlib.cc, sparse-sort.h: #define HAVE_XXX macros to 1, not just empty but defined. * octave-txt-lexer.h, octave-cmd.h, octave-preserve-stream-state.h, txt-eng.h, zfstream.h, oct-conf-features.h, oct-conf.h: Use octave_ namespace prefix on name of #define used to prevent multiple inclusion of headers. * parser.h, webinfo.h, ov-oncleanup.h, op-int.h, display-available.h, shared-fcns.h: Add #define guard to prevent multiple inclusion. * quadcc.cc: use all capitals for #define MIN_CQUAD_HEAPSIZE. * ov-intx.h: Add note that this file must not use guard #define. * eigs-base.h, randmtzig.h: Write '! defined' rather than '!defined'. * file-ops.cc, oct-sparse.h: Use parentheses around complex #if tests. * oct-syscalls.cc, oct-base64.cc, statdefs.h: Indent #ifdef blocks correctly. * oct-conf-post.in.h: Use "! defined". Define macros to 1, not just empty but defined.
author Rik <rik@octave.org>
date Sat, 06 Feb 2016 18:22:32 -0800
parents f7121e111991
children aba2e6293dd8
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1 /*
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2
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3 Copyright (C) 2008-2015 Michael Goffioul
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #if ! defined (octave_shared_fcns_h)
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24 #define octave_shared_fcns_h 1
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25
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26 #if defined (__WIN32__) && ! defined (_POSIX_VERSION)
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27
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28 #include <windows.h>
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29 #include <tlhelp32.h>
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30
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31 #ifdef _MSC_VER
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32 # define popen _popen
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33 # define pclose _pclose
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34 #endif
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35
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36 static std::string
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37 w32_get_octave_home (void)
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38 {
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39 std::string retval;
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40
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41 std::string bin_dir;
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42
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43 HANDLE h = CreateToolhelp32Snapshot (TH32CS_SNAPMODULE
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44 #ifdef TH32CS_SNAPMODULE32
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45 | TH32CS_SNAPMODULE32
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46 #endif
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47 , 0);
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48
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49 if (h != INVALID_HANDLE_VALUE)
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50 {
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51 MODULEENTRY32 mod_info;
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52
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53 ZeroMemory (&mod_info, sizeof (mod_info));
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54 mod_info.dwSize = sizeof (mod_info);
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55
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56 if (Module32First (h, &mod_info))
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57 {
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58 do
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59 {
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60 std::string mod_name (mod_info.szModule);
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61
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62 if (mod_name.find ("octave") != std::string::npos)
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63 {
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64 bin_dir = mod_info.szExePath;
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65
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66 if (bin_dir[bin_dir.length () - 1] != '\\')
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67 bin_dir.append (1, '\\');
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68
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69 break;
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70 }
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71 }
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72 while (Module32Next (h, &mod_info));
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73 }
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74
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75 CloseHandle (h);
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76 }
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77
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78 if (! bin_dir.empty ())
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79 {
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80 size_t pos = bin_dir.rfind ("\\bin\\");
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81
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82 if (pos != std::string::npos)
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83 retval = bin_dir.substr (0, pos);
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84 }
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85
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86 return retval;
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87 }
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88
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89 #endif
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90
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91 // Find the directory where the octave binary is supposed to be
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92 // installed.
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93
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94 #if (defined (OCTAVE_HAVE_WINDOWS_FILESYSTEM) \
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95 && ! defined (OCTAVE_HAVE_POSIX_FILESYSTEM))
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96 static const char dir_sep_char = '\\';
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97 #else
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98 static const char dir_sep_char = '/';
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99 #endif
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100
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101 static std::string
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102 octave_getenv (const std::string& name)
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103 {
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104 char *value = ::getenv (name.c_str ());
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105
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106 return value ? value : "";
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107 }
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108
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109 static std::string
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110 get_octave_home (void)
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111 {
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112 std::string oh = octave_getenv ("OCTAVE_HOME");
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113
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114 #if defined (__WIN32__) && ! defined (_POSIX_VERSION)
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115 if (oh.empty ())
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116 oh = w32_get_octave_home ();
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117 #endif
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118
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119 return oh.empty () ? std::string (OCTAVE_PREFIX) : oh;
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120 }
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121
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122 static std::string
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123 subst_octave_home (const std::string& s)
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124 {
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125 std::string retval;
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126
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127 std::string octave_home = get_octave_home ();
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128
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129 std::string prefix = OCTAVE_PREFIX;
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130
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131 retval = s;
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132
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133 if (octave_home != prefix)
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134 {
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135 octave_idx_type len = prefix.length ();
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136
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137 if (s.substr (0, len) == prefix)
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138 retval.replace (0, len, octave_home);
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139 }
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140
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141 if (dir_sep_char != '/')
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142 std::replace (retval.begin (), retval.end (), '/', dir_sep_char);
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143
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144 return retval;
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145 }
21213
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146
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147 #endif