#include <string.h>

/*
** Print a usage message and exit.
*/
void usage(const char *zArgv0){
  fprintf(stderr, 
"Usage: %s [-step NSTEP] TARGET-DB RBU-DB\n"
"\n"






"  Argument RBU-DB must be an RBU database containing an update suitable for\n"




"  target database TARGET-DB. If NSTEP is set to less than or equal to zero\n"
"  (the default value), this program attempts to apply the entire update to\n"
"  the target database.\n"


"\n"
"  If NSTEP is greater than zero, then a maximum of NSTEP calls are made\n"
"  to sqlite3rbu_step(). If the RBU update has not been completely applied\n"
"  after the NSTEP'th call is made, the state is saved in the database RBU-DB\n"
"  and the program exits. Subsequent invocations of this (or any other RBU)\n"
"  application will use this state to resume applying the RBU update to the\n"
"  target db.\n"
................................................................................
  int i;
  const char *zTarget;            /* Target database to apply RBU to */
  const char *zRbu;               /* Database containing RBU */
  char zBuf[200];                 /* Buffer for printf() */
  char *zErrmsg;                  /* Error message, if any */
  sqlite3rbu *pRbu;               /* RBU handle */
  int nStep = 0;                  /* Maximum number of step() calls */

  int rc;
  sqlite3_int64 nProgress = 0;


  /* Process command line arguments. Following this block local variables 
  ** zTarget, zRbu and nStep are all set. */
  if( argc==5 ){
    size_t nArg1 = strlen(argv[1]);
    if( nArg1>5 || nArg1<2 || memcmp("-step", argv[1], nArg1) ) usage(argv[0]);





    nStep = atoi(argv[2]);
  }else if( argc!=3 ){
    usage(argv[0]);
  }


  zTarget = argv[argc-2];
  zRbu = argv[argc-1];

  report_default_vfs();










  /* Open an RBU handle. If nStep is less than or equal to zero, call
  ** sqlite3rbu_step() until either the RBU has been completely applied
  ** or an error occurs. Or, if nStep is greater than zero, call
  ** sqlite3rbu_step() a maximum of nStep times.  */
  pRbu = sqlite3rbu_open(zTarget, zRbu, 0);
  report_rbu_vfs(pRbu);
  for(i=0; (nStep<=0 || i<nStep) && sqlite3rbu_step(pRbu)==SQLITE_OK; i++);
  nProgress = sqlite3rbu_progress(pRbu);
  rc = sqlite3rbu_close(pRbu, &zErrmsg);

  /* Let the user know what happened. */
  switch( rc ){
    case SQLITE_OK:

#include <string.h>

/*
** Print a usage message and exit.
*/
void usage(const char *zArgv0){
  fprintf(stderr, 
"Usage: %s ?OPTIONS? TARGET-DB RBU-DB\n"
"\n"
"Where options are:\n"
"\n"
"    -step NSTEP\n"
"    -vacuum\n"
"\n"
"  If the -vacuum switch is not present, argument RBU-DB must be an RBU\n"
"  database containing an update suitable for target database TARGET-DB.\n"
"  Or, if -vacuum is specified, then TARGET-DB is a database to vacuum using\n"
"  RBU, and RBU-DB is used as the state database for the vacuum (refer to\n"
"  API documentation for details).\n"
"\n"
"  If NSTEP is set to less than or equal to zero (the default value), this \n"


"  program attempts to perform the entire update or vacuum operation before\n"
"  exiting\n"
"\n"
"  If NSTEP is greater than zero, then a maximum of NSTEP calls are made\n"
"  to sqlite3rbu_step(). If the RBU update has not been completely applied\n"
"  after the NSTEP'th call is made, the state is saved in the database RBU-DB\n"
"  and the program exits. Subsequent invocations of this (or any other RBU)\n"
"  application will use this state to resume applying the RBU update to the\n"
"  target db.\n"
................................................................................
  int i;
  const char *zTarget;            /* Target database to apply RBU to */
  const char *zRbu;               /* Database containing RBU */
  char zBuf[200];                 /* Buffer for printf() */
  char *zErrmsg;                  /* Error message, if any */
  sqlite3rbu *pRbu;               /* RBU handle */
  int nStep = 0;                  /* Maximum number of step() calls */
  int bVacuum = 0;
  int rc;
  sqlite3_int64 nProgress = 0;
  int nArg = argc-2;



  if( argc<3 ) usage(argv[0]);
  for(i=1; i<nArg; i++){
    const char *zArg = argv[i];
    int nArg = strlen(zArg);
    if( nArg>1 && nArg<=8 && 0==memcmp(zArg, "-vacuum", nArg) ){
      bVacuum = 1;
    }else if( nArg>1 && nArg<=5 && 0==memcmp(zArg, "-step", nArg) && i<nArg-1 ){
      i++;
      nStep = atoi(argv[i]);
    }else{
      usage(argv[0]);
    }
  }

  zTarget = argv[argc-2];
  zRbu = argv[argc-1];

  report_default_vfs();

  /* Open an RBU handle. A vacuum handle if -vacuum was specified, or a
  ** regular RBU update handle otherwise.  */
  if( bVacuum ){
    pRbu = sqlite3rbu_vacuum(zTarget, zRbu);
  }else{
    pRbu = sqlite3rbu_open(zTarget, zRbu, 0);
  }
  report_rbu_vfs(pRbu);

  /* If nStep is less than or equal to zero, call
  ** sqlite3rbu_step() until either the RBU has been completely applied
  ** or an error occurs. Or, if nStep is greater than zero, call
  ** sqlite3rbu_step() a maximum of nStep times.  */


  for(i=0; (nStep<=0 || i<nStep) && sqlite3rbu_step(pRbu)==SQLITE_OK; i++);
  nProgress = sqlite3rbu_progress(pRbu);
  rc = sqlite3rbu_close(pRbu, &zErrmsg);

  /* Let the user know what happened. */
  switch( rc ){
    case SQLITE_OK: