From 00184d655a72ed5a71aa80449250255fb8ac2caa Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Tue, 23 Jan 2024 06:36:41 +0100
Subject: Merging upstream version 1.14~rc1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 decoder.c | 62 +++++++++++++++++++++++++++-----------------------------------
 1 file changed, 27 insertions(+), 35 deletions(-)

(limited to 'decoder.c')

diff --git a/decoder.c b/decoder.c
index b52b35f..ab6a259 100644
--- a/decoder.c
+++ b/decoder.c
@@ -1,5 +1,5 @@
 /* Lunzip - Decompressor for the lzip format
-   Copyright (C) 2010-2022 Antonio Diaz Diaz.
+   Copyright (C) 2010-2023 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
@@ -111,24 +111,21 @@ void LZd_flush_data( struct LZ_decoder * const d )
   }
 
 
-static bool LZd_verify_trailer( struct LZ_decoder * const d,
-                                struct Pretty_print * const pp )
+static int LZd_check_trailer( struct LZ_decoder * const d,
+                              struct Pretty_print * const pp,
+                              const bool ignore_empty )
   {
   Lzip_trailer trailer;
   int size = Rd_read_data( d->rdec, trailer, Lt_size );
-  const unsigned long long data_size = LZd_data_position( d );
-  const unsigned long long member_size = Rd_member_position( d->rdec );
   bool error = false;
 
   if( size < Lt_size )
     {
     error = true;
     if( verbosity >= 0 )
-      {
-      Pp_show_msg( pp, 0 );
-      fprintf( stderr, "Trailer truncated at trailer position %d;"
-                       " some checks may fail.\n", size );
-      }
+      { Pp_show_msg( pp, 0 );
+        fprintf( stderr, "Trailer truncated at trailer position %d;"
+                         " some checks may fail.\n", size ); }
     while( size < Lt_size ) trailer[size++] = 0;
     }
 
@@ -137,35 +134,32 @@ static bool LZd_verify_trailer( struct LZ_decoder * const d,
     {
     error = true;
     if( verbosity >= 0 )
-      {
-      Pp_show_msg( pp, 0 );
-      fprintf( stderr, "CRC mismatch; stored %08X, computed %08X\n",
-               td_crc, LZd_crc( d ) );
-      }
+      { Pp_show_msg( pp, 0 );
+        fprintf( stderr, "CRC mismatch; stored %08X, computed %08X\n",
+                 td_crc, LZd_crc( d ) ); }
     }
+  const unsigned long long data_size = LZd_data_position( d );
   const unsigned long long td_size = Lt_get_data_size( trailer );
   if( td_size != data_size )
     {
     error = true;
     if( verbosity >= 0 )
-      {
-      Pp_show_msg( pp, 0 );
-      fprintf( stderr, "Data size mismatch; stored %llu (0x%llX), computed %llu (0x%llX)\n",
-               td_size, td_size, data_size, data_size );
-      }
+      { Pp_show_msg( pp, 0 );
+        fprintf( stderr, "Data size mismatch; stored %llu (0x%llX), computed %llu (0x%llX)\n",
+                 td_size, td_size, data_size, data_size ); }
     }
+  const unsigned long long member_size = Rd_member_position( d->rdec );
   const unsigned long long tm_size = Lt_get_member_size( trailer );
   if( tm_size != member_size )
     {
     error = true;
     if( verbosity >= 0 )
-      {
-      Pp_show_msg( pp, 0 );
-      fprintf( stderr, "Member size mismatch; stored %llu (0x%llX), computed %llu (0x%llX)\n",
-               tm_size, tm_size, member_size, member_size );
-      }
+      { Pp_show_msg( pp, 0 );
+        fprintf( stderr, "Member size mismatch; stored %llu (0x%llX), computed %llu (0x%llX)\n",
+                 tm_size, tm_size, member_size, member_size ); }
     }
-  if( error ) return false;
+  if( error ) return 3;
+  if( !ignore_empty && data_size == 0 ) return 5;
   if( verbosity >= 2 )
     {
     if( verbosity >= 4 ) show_header( d->dictionary_size );
@@ -180,13 +174,15 @@ static bool LZd_verify_trailer( struct LZ_decoder * const d,
     if( verbosity >= 3 )
       fprintf( stderr, "%9llu out, %8llu in. ", data_size, member_size );
     }
-  return true;
+  return 0;
   }
 
 
 /* Return value: 0 = OK, 1 = decoder error, 2 = unexpected EOF,
-                 3 = trailer error, 4 = unknown marker found. */
+                 3 = trailer error, 4 = unknown marker found,
+                 5 = empty member found, 6 = marked member found. */
 int LZd_decode_member( struct LZ_decoder * const d,
+                       const struct Cl_options * const cl_opts,
                        struct Pretty_print * const pp )
   {
   struct Range_decoder * const rdec = d->rdec;
@@ -222,7 +218,7 @@ int LZd_decode_member( struct LZ_decoder * const d,
   Lm_init( &match_len_model );
   Lm_init( &rep_len_model );
 
-  Rd_load( rdec );
+  if( !Rd_load( rdec, cl_opts->ignore_marking ) ) return 6;
   while( !Rd_finished( rdec ) )
     {
     const int pos_state = LZd_data_position( d ) & pos_state_mask;
@@ -287,13 +283,9 @@ int LZd_decode_member( struct LZ_decoder * const d,
             Rd_normalize( rdec );
             LZd_flush_data( d );
             if( len == min_match_len )		/* End Of Stream marker */
-              {
-              if( LZd_verify_trailer( d, pp ) ) return 0; else return 3;
-              }
+              return LZd_check_trailer( d, pp, cl_opts->ignore_empty );
             if( len == min_match_len + 1 )	/* Sync Flush marker */
-              {
-              Rd_load( rdec ); continue;
-              }
+              { Rd_load( rdec, true ); continue; }
             if( verbosity >= 0 )
               {
               Pp_show_msg( pp, 0 );
-- 
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