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
  27 {
  28 namespace tools
  29 {
  30
  31 Options::Options (char const * program)
  32     : m_program (program)
  33 {}
  34
  35 Options::~Options()
  36 {}
  37
  38 // static
  39 bool Options::checkArgument(std::vector< std::string> & rArgs, char const * arg, size_t len)
  40 {
  41     bool result = ((arg != nullptr) && (len > 0));
  42     OSL_PRECOND(result, "registry::tools::Options::checkArgument(): invalid arguments");
  43     if (result)
  44     {
  45         switch (arg[0])
  46         {
  47         case '@':
  48             result = len > 1;
  49             if (result)
  50             {
  51                 // "@<cmdfile>"
  52                 result = Options::checkCommandFile(rArgs, &(arg[1]));
  53             }
  54             break;
  55         case '-':
  56             result = len > 1;
  57             if (result)
  58             {
  59                 // "-<option>"
  60                 std::string option (&(arg[0]), 2);
  61                 rArgs.push_back(option);
  62                 if (len > 2)
  63                 {
  64                     // "-<option><param>"
  65                     std::string param(&(arg[2]), len - 2);
  66                     rArgs.push_back(param);
  67                 }
  68             }
  69             break;
  70         default:
  71             rArgs.push_back(std::string(arg, len));
  72             break;
  73         }
  74     }
  75     return result;
  76 }
  77
  78 // static
  79 bool Options::checkCommandFile(std::vector< std::string > & rArgs, char const * filename)
  80 {
  81     FILE * fp = fopen(filename, "r");
  82     if (fp == nullptr)
  83     {
  84         fprintf(stderr, "ERROR: Can't open command file \"%s\"\n", filename);
  85         return false;
  86     }
  87
  88     std::string buffer;
  89     buffer.reserve(256);
  90
  91     bool quoted = false;
  92     int  c = EOF;
  93     while ((c = fgetc(fp)) != EOF)
  94     {
  95         switch(c)
  96         {
  97         case '\"':
  98             quoted = !quoted;
  99             break;
 100         case ' ':
 101         case '\t':
 102         case '\r':
 103         case '\n':
 104             if (!quoted)
 105             {
 106                 if (!buffer.empty())
 107                 {
 108                     if (!checkArgument(rArgs, buffer.c_str(), buffer.size()))
 109                     {
 110                         // failure.
 111                         (void) fclose(fp);
 112                         return false;
 113                     }
 114                     buffer.clear();
 115                 }
 116                 break;
 117             }
 118             [[fallthrough]];
 119         default:
 120             buffer.push_back(sal::static_int_cast<char>(c));
 121             break;
 122         }
 123     }
 124     return fclose(fp) == 0;
 125 }
 126
 127 bool Options::initOptions (std::vector< std::string > & rArgs)
 128 {
 129     return initOptions_Impl (rArgs);
 130 }
 131
 132 bool Options::badOption (char const * reason, char const * option) const
 133 {
 134     (void) fprintf(stderr, "%s: %s option '%s'\n", m_program.c_str(), reason, option);
 135     return printUsage();
 136 }
 137
 138 bool Options::printUsage() const
 139 {
 140     printUsage_Impl();
 141     return false;
 142 }
 143
 144 } // namespace tools
 145 } // namespace registry
 146
 147 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */