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[mirrors/Programs.git] / misc / BinCracking / hexcmp.c

#include <stdio.h>\r
#include <stdlib.h>\r
\r
int main(int argc, char *argv[])\r
{\r
  printf("HEXCMP 0.3\nHexadecimal Comparator\n<-Harvie 2oo7\n\n");\r
  if(argc < 3) {\r
          printf("Usage: hexcmp oldfile newfile [decimal_offset_to_start_at]\n");\r
          printf("This will show what is new in \"newfile\",\n");\r
          printf("this can be useful, when making binary patchers.\n\n");\r
          system("pause");\r
          return 0;\r
          }\r
    \r
  printf("Comparing old \"%s\" with new \"%s\"\n", argv[1], argv[2]); \r
  \r
  FILE *forig, *fcrac;\r
  forig = fopen(argv[1], "rb");\r
    if(forig == NULL) { printf("Error while opening %s\n", argv[1]); return 0; }\r
  fcrac = fopen(argv[2], "rb");\r
    if(fcrac == NULL) { printf("Error while opening %s\n", argv[2]); return 0; }\r
  \r
  short found = 0;\r
  unsigned long int offset = 0, last = 0, end = 0, dlen = 0;\r
  int corig = 0, ccrac = 0;\r
  \r
  if(argc > 3) {\r
          offset = atof(argv[3]);\r
          printf("Comparing from offset D: %d H: 0x%x\n", offset, offset);\r
          }\r
  printf("\n");\r
  \r
  //Seek\r
  fseek(forig, offset, SEEK_SET);\r
  fseek(fcrac, offset, SEEK_SET);\r
  \r
  while((ccrac = fgetc(fcrac)) != EOF) {\r
    if( (corig = fgetc(forig)) == EOF ) {\r
       corig == -9999;\r
       if(end == 0) {\r
         end = 1;   \r
       }\r
    }\r
    if(corig != ccrac) {\r
      \r
      if(end == 1) {\r
        if(dlen != 0) {\r
                printf("\nLenght: %d Bytes", dlen);\r
                dlen = 0;\r
                }\r
        printf("\n\n--- END OF OLDER FILE ---\n\n"); \r
        end = 2;\r
      }\r
      \r
      if(offset != (last+1)) {\r
        if(dlen != 0) {\r
          printf("\nLenght: %d Bytes", dlen);\r
          dlen = 0;\r
          printf("\n\n");\r
        }\r
        printf("Difference @ D: %d H: 0x%x\n", offset, offset);\r
      }\r
        \r
      printf("\\x%x", ccrac);\r
      \r
      dlen++;\r
      last = offset;\r
      found = 1;\r
    }\r
    \r
    offset++;\r
  }\r
  \r
   if(dlen != 0) {\r
          printf("\nLenght: %d Bytes", dlen);\r
        }\r
  \r
  fclose(forig);\r
  fclose(fcrac);\r
  \r
  if(found == 0) {\r
           printf("No difference found!!!");\r
           }\r
  printf("\n");\r
  //system("PAUSE"); //Debug\r
  return 0;\r
}\r