registry/tools/options.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include "options.hxx"
  21
  22 #include <osl/diagnose.h>
  23
  24 #include <stdio.h>
  25
  26 namespace registry::tools
  27 {
  28
  29 Options::Options (char const * program)
  30     : m_program (program)
  31 {}
  32
  33 Options::~Options()
  34 {}
  35
  36 // static
  37 bool Options::checkArgument(std::vector< std::string> & rArgs, char const * arg, size_t len)
  38 {
  39     bool result = ((arg != nullptr) && (len > 0));
  40     OSL_PRECOND(result, "registry::tools::Options::checkArgument(): invalid arguments");
  41     if (result)
  42     {
  43         switch (arg[0])
  44         {
  45         case '@':
  46             result = len > 1;
  47             if (result)
  48             {
  49                 // "@<cmdfile>"
  50                 result = Options::checkCommandFile(rArgs, &(arg[1]));
  51             }
  52             break;
  53         case '-':
  54             result = len > 1;
  55             if (result)
  56             {
  57                 // "-<option>"
  58                 std::string option (&(arg[0]), 2);
  59                 rArgs.push_back(option);
  60                 if (len > 2)
  61                 {
  62                     // "-<option><param>"
  63                     std::string param(&(arg[2]), len - 2);
  64                     rArgs.push_back(param);
  65                 }
  66             }
  67             break;
  68         default:
  69             rArgs.push_back(std::string(arg, len));
  70             break;
  71         }
  72     }
  73     return result;
  74 }
  75
  76 // static
  77 bool Options::checkCommandFile(std::vector< std::string > & rArgs, char const * filename)
  78 {
  79     FILE * fp = fopen(filename, "r");
  80     if (fp == nullptr)
  81     {
  82         fprintf(stderr, "ERROR: Can't open command file \"%s\"\n", filename);
  83         return false;
  84     }
  85
  86     std::string buffer;
  87     buffer.reserve(256);
  88
  89     bool quoted = false;
  90     int  c = EOF;
  91     while ((c = fgetc(fp)) != EOF)
  92     {
  93         switch(c)
  94         {
  95         case '\"':
  96             quoted = !quoted;
  97             break;
  98         case ' ':
  99         case '\t':
 100         case '\r':
 101         case '\n':
 102             if (!quoted)
 103             {
 104                 if (!buffer.empty())
 105                 {
 106                     if (!checkArgument(rArgs, buffer.c_str(), buffer.size()))
 107                     {
 108                         // failure.
 109                         (void) fclose(fp);
 110                         return false;
 111                     }
 112                     buffer.clear();
 113                 }
 114                 break;
 115             }
 116             [[fallthrough]];
 117         default:
 118             buffer.push_back(sal::static_int_cast<char>(c));
 119             break;
 120         }
 121     }
 122     return fclose(fp) == 0;
 123 }
 124
 125 bool Options::initOptions (std::vector< std::string > & rArgs)
 126 {
 127     return initOptions_Impl (rArgs);
 128 }
 129
 130 bool Options::badOption (char const * reason, char const * option) const
 131 {
 132     (void) fprintf(stderr, "%s: %s option '%s'\n", m_program.c_str(), reason, option);
 133     return printUsage();
 134 }
 135
 136 bool Options::printUsage() const
 137 {
 138     printUsage_Impl();
 139     return false;
 140 }
 141
 142 } // namespace registry::tools
 143
 144 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */