Merging upstream version 1.3.

Signed-off-by: Daniel Baumann <mail@daniel-baumann.ch>

1 files changed, 234 insertions, 0 deletions

diff --git a/lzcheck.c b/lzcheck.c
new file mode 100644
index 0000000..19a1887
--- /dev/null
+++ b/lzcheck.c
@@ -0,0 +1,234 @@
+/*  Lzcheck - A test program for the lzlib library
+    Copyright (C) 2009, 2010, 2011, 2012 Antonio Diaz Diaz.
+
+    This program is free software: you have unlimited permission
+    to copy, distribute and modify it.
+
+    Usage is:
+      lzcheck filename.txt
+
+    This program reads the specified text file and then compresses it,
+    line by line, to test the flushing mechanism and the member
+    restart/reset/sync functions.
+*/
+
+#define _FILE_OFFSET_BITS 64
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "lzlib.h"
+
+#ifndef LLONG_MAX
+#define LLONG_MAX  0x7FFFFFFFFFFFFFFFLL
+#endif
+#ifndef LLONG_MIN
+#define LLONG_MIN  (-LLONG_MAX - 1LL)
+#endif
+#ifndef ULLONG_MAX
+#define ULLONG_MAX 0xFFFFFFFFFFFFFFFFULL
+#endif
+
+#ifndef min
+  #define min(x,y) ((x) <= (y) ? (x) : (y))
+#endif
+
+enum { buffer_size = 32768 };
+uint8_t in_buffer[buffer_size];
+uint8_t mid_buffer[buffer_size];
+uint8_t out_buffer[buffer_size];
+
+
+int main( const int argc, const char * const argv[] )
+  {
+  if( argc < 2 )
+    {
+    fprintf( stderr, "Usage: lzcheck filename.txt\n" );
+    return 1;
+    }
+
+  FILE *file = fopen( argv[1], "rb" );
+  if( !file )
+    {
+    fprintf( stderr, "lzcheck: Can't open file '%s' for reading\n", argv[1] );
+    return 1;
+    }
+/*  fprintf( stderr, "lzcheck: Testing file '%s'\n", argv[1] ); */
+
+  const int dictionary_size = 1 << 20;
+  const int match_len_limit = 36;
+  const long long member_size = LLONG_MAX;
+  struct LZ_Encoder * const encoder =
+    LZ_compress_open( dictionary_size, match_len_limit, member_size );
+  if( !encoder || LZ_compress_errno( encoder ) != LZ_ok )
+    {
+    const bool mem_error = ( LZ_compress_errno( encoder ) == LZ_mem_error );
+    LZ_compress_close( encoder );
+    if( mem_error )
+      {
+      fprintf( stderr, "lzcheck: Not enough memory.\n" );
+      return 1;
+      }
+    fprintf( stderr, "lzcheck: internal error: Invalid argument to encoder.\n" );
+    return 3;
+    }
+
+  struct LZ_Decoder * const decoder = LZ_decompress_open();
+  if( !decoder || LZ_decompress_errno( decoder ) != LZ_ok )
+    {
+    LZ_decompress_close( decoder );
+    fprintf( stderr, "lzcheck: Not enough memory.\n" );
+    return 1;
+    }
+
+  int retval = 0;
+  while( retval <= 1 )
+    {
+    int i, l, r;
+    const int read_size = fread( in_buffer, 1, buffer_size, file );
+    if( read_size <= 0 ) break;			/* end of file */
+
+    for( l = 0, r = 1; r <= read_size; l = r, ++r )
+      {
+      while( r < read_size && in_buffer[r-1] != '\n' ) ++r;
+      const int in_size = LZ_compress_write( encoder, in_buffer + l, r - l );
+      if( in_size < r - l ) r = l + in_size;
+      LZ_compress_sync_flush( encoder );
+      const int mid_size = LZ_compress_read( encoder, mid_buffer, buffer_size );
+      if( mid_size < 0 )
+        {
+        fprintf( stderr, "lzcheck: LZ_compress_read error: %s.\n",
+                 LZ_strerror( LZ_compress_errno( encoder ) ) );
+        retval = 3; break;
+        }
+      LZ_decompress_write( decoder, mid_buffer, mid_size );
+      const int out_size = LZ_decompress_read( decoder, out_buffer, buffer_size );
+      if( out_size < 0 )
+        {
+        fprintf( stderr, "lzcheck: LZ_decompress_read error: %s.\n",
+                 LZ_strerror( LZ_decompress_errno( decoder ) ) );
+        retval = 3; break;
+        }
+
+      if( out_size != in_size || memcmp( in_buffer + l, out_buffer, out_size ) )
+        {
+        fprintf( stderr, "lzcheck: Sync error at pos %d. in_size = %d, out_size = %d\n",
+                 l, in_size, out_size );
+        for( i = 0; i < in_size; ++i )
+          fputc( in_buffer[l+i], stderr );
+        if( in_buffer[l+in_size-1] != '\n' )
+          fputc( '\n', stderr );
+        for( i = 0; i < out_size; ++i )
+          fputc( out_buffer[i], stderr );
+        fputc( '\n', stderr );
+        retval = 1;
+        }
+      }
+    }
+
+  if( retval <= 1 )
+    {
+    rewind( file );
+    if( LZ_compress_finish( encoder ) < 0 ||
+        LZ_decompress_write( decoder, mid_buffer, LZ_compress_read( encoder, mid_buffer, buffer_size ) ) < 0 ||
+        LZ_decompress_read( decoder, out_buffer, buffer_size ) != 0 ||
+        LZ_compress_restart_member( encoder, member_size ) < 0 )
+      {
+      fprintf( stderr, "lzcheck: Can't finish member: %s.\n",
+               LZ_strerror( LZ_decompress_errno( decoder ) ) );
+      retval = 3;
+      }
+    }
+
+  while( retval <= 1 )
+    {
+    int i, l, r;
+    const int read_size = fread( in_buffer, 1, buffer_size / 2, file );
+    if( read_size <= 0 ) break;			/* end of file */
+
+    for( l = 0, r = 1; r <= read_size; l = r, ++r )
+      {
+      while( r < read_size && in_buffer[r-1] != '\n' ) ++r;
+      const int leading_garbage = (l == 0) ? min( r, read_size / 2 ) : 0;
+      const int in_size = LZ_compress_write( encoder, in_buffer + l, r - l );
+      if( in_size < r - l ) r = l + in_size;
+      LZ_compress_sync_flush( encoder );
+      if( leading_garbage )
+        memset( mid_buffer, in_buffer[0], leading_garbage );
+      const int mid_size = LZ_compress_read( encoder,
+                                             mid_buffer + leading_garbage,
+                                             buffer_size - leading_garbage );
+      if( mid_size < 0 )
+        {
+        fprintf( stderr, "lzcheck: LZ_compress_read error: %s.\n",
+                 LZ_strerror( LZ_compress_errno( encoder ) ) );
+        retval = 3; break;
+        }
+      LZ_decompress_write( decoder, mid_buffer, mid_size + leading_garbage );
+      int out_size = LZ_decompress_read( decoder, out_buffer, buffer_size );
+      if( out_size < 0 )
+        {
+        if( LZ_decompress_errno( decoder ) == LZ_header_error ||
+            LZ_decompress_errno( decoder ) == LZ_data_error )
+          {
+          LZ_decompress_sync_to_member( decoder );  /* remove leading garbage */
+          out_size = LZ_decompress_read( decoder, out_buffer, buffer_size );
+          }
+        if( out_size < 0 )
+          {
+          fprintf( stderr, "lzcheck: LZ_decompress_read error: %s.\n",
+                   LZ_strerror( LZ_decompress_errno( decoder ) ) );
+          retval = 3; break;
+          }
+        }
+
+      if( out_size != in_size || memcmp( in_buffer + l, out_buffer, out_size ) )
+        {
+        fprintf( stderr, "lzcheck: Sync error at pos %d. in_size = %d, out_size = %d\n",
+                 l, in_size, out_size );
+        for( i = 0; i < in_size; ++i )
+          fputc( in_buffer[l+i], stderr );
+        if( in_buffer[l+in_size-1] != '\n' )
+          fputc( '\n', stderr );
+        for( i = 0; i < out_size; ++i )
+          fputc( out_buffer[i], stderr );
+        fputc( '\n', stderr );
+        retval = 1;
+        }
+      }
+    if( retval >= 3 ) break;
+
+    if( LZ_compress_finish( encoder ) < 0 ||
+        LZ_decompress_write( decoder, mid_buffer, LZ_compress_read( encoder, mid_buffer, buffer_size ) ) < 0 ||
+        LZ_decompress_read( decoder, out_buffer, buffer_size ) != 0 ||
+        LZ_decompress_reset( decoder ) < 0 ||
+        LZ_compress_restart_member( encoder, member_size ) < 0 )
+      {
+      fprintf( stderr, "lzcheck: Can't restart member: %s.\n",
+               LZ_strerror( LZ_decompress_errno( decoder ) ) );
+      retval = 3; break;
+      }
+
+    const int size = min( 100, read_size );
+    if( LZ_compress_write( encoder, in_buffer, size ) != size ||
+        LZ_compress_finish( encoder ) < 0 ||
+        LZ_decompress_write( decoder, mid_buffer, LZ_compress_read( encoder, mid_buffer, buffer_size ) ) < 0 ||
+        LZ_decompress_read( decoder, out_buffer, 0 ) != 0 ||
+        LZ_decompress_sync_to_member( decoder ) < 0 ||
+        LZ_compress_restart_member( encoder, member_size ) < 0 )
+      {
+      fprintf( stderr, "lzcheck: Can't seek to next member: %s.\n",
+               LZ_strerror( LZ_decompress_errno( decoder ) ) );
+      retval = 3; break;
+      }
+    }
+
+  LZ_decompress_close( decoder );
+  LZ_compress_close( encoder );
+  fclose( file );
+  return retval;
+  }