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#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"
"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"
" 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"
" 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"
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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;
/* 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]);
}
/* Open an RBU handle. If nStep is less than or equal to zero, call
/* 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);
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