1 | /* |
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2 | * Copyright (c) 2011-2014, Chris Johns <chrisj@rtems.org> |
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3 | * |
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4 | * Permission to use, copy, modify, and/or distribute this software for any |
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5 | * purpose with or without fee is hereby granted, provided that the above |
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6 | * copyright notice and this permission notice appear in all copies. |
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7 | * |
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8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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15 | */ |
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16 | |
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17 | #include <algorithm> |
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18 | #include <fstream> |
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19 | #include <string> |
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20 | |
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21 | #include <rld.h> |
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22 | #include <pkgconfig.h> |
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23 | |
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24 | namespace pkgconfig |
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25 | { |
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26 | package::package (const std::string& name) |
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27 | { |
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28 | load (name); |
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29 | } |
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30 | |
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31 | package::package () |
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32 | { |
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33 | } |
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34 | |
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35 | void |
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36 | package::load (const std::string& name) |
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37 | { |
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38 | std::ifstream in (name.c_str (), std::ios::in); |
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39 | |
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40 | while (!in.eof ()) |
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41 | { |
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42 | char buffer[1024]; |
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43 | |
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44 | in.getline (buffer, sizeof (buffer)); |
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45 | |
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46 | std::string line (buffer); |
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47 | size_t hash; |
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48 | |
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49 | hash = line.find ('#'); |
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50 | if (hash != std::string::npos) |
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51 | line.erase(hash); |
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52 | |
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53 | if (line.size () > 0) |
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54 | { |
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55 | size_t eq = line.find_first_of ('='); |
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56 | size_t dd = line.find_first_of (':'); |
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57 | |
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58 | size_t d = std::string::npos; |
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59 | bool def = false; |
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60 | |
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61 | if ((eq != std::string::npos) && (dd != std::string::npos)) |
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62 | { |
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63 | if (eq < dd) |
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64 | { |
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65 | d = eq; |
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66 | def = true; |
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67 | } |
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68 | else |
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69 | { |
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70 | d = dd; |
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71 | def = false; |
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72 | } |
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73 | } |
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74 | else if (eq != std::string::npos) |
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75 | { |
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76 | d = eq; |
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77 | def = true; |
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78 | } |
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79 | else if (dd != std::string::npos) |
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80 | { |
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81 | d = dd; |
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82 | def = false; |
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83 | } |
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84 | |
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85 | if (d != std::string::npos) |
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86 | { |
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87 | std::string lhs = rld::tolower (line.substr (0, d)); |
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88 | std::string rhs = line.substr (d + 1); |
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89 | if (def) |
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90 | defines[lhs] = rhs; |
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91 | else |
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92 | fields[lhs] = rhs; |
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93 | } |
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94 | } |
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95 | } |
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96 | |
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97 | in.close (); |
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98 | } |
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99 | |
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100 | bool |
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101 | package::get (const std::string& label, std::string& result) |
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102 | { |
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103 | result.erase (); |
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104 | |
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105 | std::string ll = rld::tolower (label); |
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106 | table::iterator ti = fields.find (ll); |
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107 | |
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108 | if (ti == fields.end ()) |
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109 | return false; |
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110 | |
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111 | /* |
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112 | * Take a copy so we can expand the macros in it. |
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113 | */ |
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114 | std::string s = ti->second; |
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115 | |
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116 | /* |
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117 | * Loop until there is nothing more to expand. |
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118 | */ |
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119 | bool expanded = true; |
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120 | while (expanded) |
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121 | { |
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122 | /* |
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123 | * Need to perform a regular expression search for '\$\{[^\}]+\}'. This |
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124 | * means look for every '${' then accept any character that is not a '}' |
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125 | * and finish with a '}'. |
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126 | */ |
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127 | expanded = false; |
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128 | size_t p = 0; |
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129 | while (p < s.length ()) |
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130 | { |
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131 | /* |
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132 | * Find the start and end of the label. |
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133 | */ |
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134 | size_t ms = s.find ("${", p); |
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135 | if (ms != std::string::npos) |
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136 | { |
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137 | size_t me = s.find ('}', ms); |
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138 | if (me != std::string::npos) |
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139 | { |
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140 | std::string ml = rld::tolower(s.substr (ms + 2, me - ms - 2)); |
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141 | table::iterator di = defines.find (ml); |
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142 | if (di != defines.end ()) |
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143 | { |
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144 | s = rld::find_replace (s, s.substr (ms, me - ms + 1), di->second); |
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145 | expanded = true; |
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146 | } |
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147 | p = me + 1; |
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148 | } |
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149 | else |
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150 | { |
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151 | p = ms + 2; |
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152 | } |
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153 | } |
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154 | else |
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155 | { |
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156 | p = s.length (); |
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157 | } |
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158 | } |
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159 | } |
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160 | |
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161 | result = rld::trim (s); |
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162 | |
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163 | return true; |
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164 | } |
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165 | } |
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