Merging upstream version 1.20.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 123 insertions, 0 deletions

diff --git a/main_common.cc b/main_common.cc
new file mode 100644
index 0000000..3b9f677
--- /dev/null
+++ b/main_common.cc
@@ -0,0 +1,123 @@
+/*  Lziprecover - Data recovery tool for the lzip format
+    Copyright (C) 2009-2018 Antonio Diaz Diaz.
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+namespace {
+
+const char * const program_year = "2018";
+
+
+void show_version()
+  {
+  std::printf( "%s %s\n", program_name, PROGVERSION );
+  std::printf( "Copyright (C) %s Antonio Diaz Diaz.\n", program_year );
+  std::printf( "License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>\n"
+               "This is free software: you are free to change and redistribute it.\n"
+               "There is NO WARRANTY, to the extent permitted by law.\n" );
+  }
+
+
+// Recognized formats: <num>[YZEPTGM][i][Bs], <num>k[Bs], <num>Ki[Bs]
+//
+long long getnum( const char * const ptr, const int hardbs,
+                  const long long llimit = -LLONG_MAX,
+                  const long long ulimit = LLONG_MAX,
+                  const char ** const tailp = 0 )
+  {
+  char * tail;
+  errno = 0;
+  long long result = strtoll( ptr, &tail, 0 );
+  if( tail == ptr )
+    {
+    show_error( "Bad or missing numerical argument.", 0, true );
+    std::exit( 1 );
+    }
+
+  if( !errno && tail[0] )
+    {
+    char * const p = tail++;
+    int factor = 1000;				// default factor
+    int exponent = -1;				// -1 = bad multiplier
+    char usuf = 0;			// 'B' or 's' unit suffix is present
+    switch( *p )
+      {
+      case 'Y': exponent = 8; break;
+      case 'Z': exponent = 7; break;
+      case 'E': exponent = 6; break;
+      case 'P': exponent = 5; break;
+      case 'T': exponent = 4; break;
+      case 'G': exponent = 3; break;
+      case 'M': exponent = 2; break;
+      case 'K': if( tail[0] == 'i' ) { ++tail; factor = 1024; exponent = 1; } break;
+      case 'k': if( tail[0] != 'i' ) exponent = 1; break;
+      case 'B':
+      case 's': usuf = *p; exponent = 0; break;
+      default : if( tailp ) { tail = p; exponent = 0; } break;
+      }
+    if( exponent > 1 && tail[0] == 'i' ) { ++tail; factor = 1024; }
+    if( exponent > 0 && usuf == 0 && ( tail[0] == 'B' || tail[0] == 's' ) )
+      { usuf = tail[0]; ++tail; }
+    if( exponent < 0 || ( usuf == 's' && hardbs <= 0 ) ||
+        ( !tailp && tail[0] != 0 ) )
+      {
+      show_error( "Bad multiplier in numerical argument.", 0, true );
+      std::exit( 1 );
+      }
+    for( int i = 0; i < exponent; ++i )
+      {
+      if( LLONG_MAX / factor >= llabs( result ) ) result *= factor;
+      else { errno = ERANGE; break; }
+      }
+    if( usuf == 's' )
+      {
+      if( LLONG_MAX / hardbs >= llabs( result ) ) result *= hardbs;
+      else errno = ERANGE;
+      }
+    }
+  if( !errno && ( result < llimit || result > ulimit ) ) errno = ERANGE;
+  if( errno )
+    {
+    show_error( "Numerical argument out of limits." );
+    std::exit( 1 );
+    }
+  if( tailp ) *tailp = tail;
+  return result;
+  }
+
+} // end namespace
+
+
+void show_error( const char * const msg, const int errcode, const bool help )
+  {
+  if( verbosity < 0 ) return;
+  if( msg && msg[0] )
+    {
+    std::fprintf( stderr, "%s: %s", program_name, msg );
+    if( errcode > 0 ) std::fprintf( stderr, ": %s", std::strerror( errcode ) );
+    std::fputc( '\n', stderr );
+    }
+  if( help )
+    std::fprintf( stderr, "Try '%s --help' for more information.\n",
+                  invocation_name );
+  }
+
+
+void internal_error( const char * const msg )
+  {
+  if( verbosity >= 0 )
+    std::fprintf( stderr, "%s: internal error: %s\n", program_name, msg );
+  std::exit( 3 );
+  }