src/msgdump.c

   1 // Copyright (C) 2021-2023 Harry Godden (hgn) - All Rights Reserved
   2
   3 #define VG_TOOLS
   4 #include "vg/vg.h"
   5 #include "vg/vg_msg.h"
   6
   7 #define CHUNK_SIZE 4096
   8
   9 int main( int argc, char *argv[] ){
  10    assert(argc);
  11
  12         if( argc < 2 ){
  13                 vg_error( "Usage: %s <file>\n", argv[0] );
  14                 return 0;
  15         }
  16
  17    FILE *f = fopen( argv[1], "rb" );
  18         if( !f ){
  19       vg_error( "vg_disk_open_read: %s\n", strerror(errno) );
  20    }
  21
  22    void *buffer = NULL;
  23    u64 current = 0;
  24
  25    /* read in chunks */
  26    for( u32 i=0; 1; i++ ){
  27       buffer = realloc( buffer, current + CHUNK_SIZE );
  28       u64 l = fread( buffer + current, 1, CHUNK_SIZE, f );
  29       current += l;
  30
  31       if( l != CHUNK_SIZE ){
  32          if( feof( f ) ){
  33             break;
  34          }
  35          else{
  36             if( ferror( f ) ){
  37                fclose(f);
  38                vg_fatal_error( "read error" );
  39             }
  40             else{
  41                fclose(f);
  42                vg_fatal_error( "unknown error codition" );
  43             }
  44          }
  45       }
  46    }
  47
  48    fclose( f );
  49
  50    vg_msg msg;
  51    vg_msg_init( &msg, buffer, current );
  52    vg_msg_print( &msg, current );
  53
  54    free( buffer );
  55 }