/**
* @interface_method_impl{DBGCCMDHLP,pfnHlpExec}
*/
static DECLCALLBACK(int) dbgcHlpExec(PDBGCCMDHLP pCmdHlp, const char *pszExpr, ...)
{
PDBGC pDbgc = DBGC_CMDHLP2DBGC(pCmdHlp);
/* Save the scratch state. */
char *pszScratch = pDbgc->pszScratch;
unsigned iArg = pDbgc->iArg;
/*
* Format the expression.
*/
va_list args;
va_start(args, pszExpr);
size_t cbScratch = sizeof(pDbgc->achScratch) - (pDbgc->pszScratch - &pDbgc->achScratch[0]);
size_t cb = RTStrPrintfExV(dbgcStringFormatter, pDbgc, pDbgc->pszScratch, cbScratch, pszExpr, args);
va_end(args);
if (cb >= cbScratch)
return VERR_BUFFER_OVERFLOW;
/*
* Execute the command.
* We save and restore the arg index and scratch buffer pointer.
*/
pDbgc->pszScratch = pDbgc->pszScratch + cb + 1;
int rc = dbgcEvalCommand(pDbgc, pszScratch, cb, false /* fNoExecute */);
/* Restore the scratch state. */
pDbgc->iArg = iArg;
pDbgc->pszScratch = pszScratch;
return rc;
}
/**
* Process all commands currently in the buffer.
*
* @returns VBox status code. Any error indicates the termination of the console session.
* @param pDbgc Debugger console instance data.
* @param fNoExecute Indicates that no commands should actually be executed.
*/
static int dbgcProcessCommands(PDBGC pDbgc, bool fNoExecute)
{
/** @todo Replace this with a sh/ksh/csh/rexx like toplevel language that
* allows doing function, loops, if, cases, and such. */
int rc = VINF_SUCCESS;
while (pDbgc->cInputLines)
{
/*
* Empty the log buffer if we're hooking the log.
*/
if (pDbgc->fLog)
{
rc = dbgcProcessLog(pDbgc);
if (RT_FAILURE(rc))
break;
}
if (pDbgc->iRead == pDbgc->iWrite)
{
AssertMsgFailed(("The input buffer is empty while cInputLines=%d!\n", pDbgc->cInputLines));
pDbgc->cInputLines = 0;
return 0;
}
/*
* Copy the command to the parse buffer.
*/
char ch;
char *psz = &pDbgc->achInput[pDbgc->iRead];
char *pszTrg = &pDbgc->achScratch[0];
while ((*pszTrg = ch = *psz++) != ';' && ch != '\n' )
{
if (psz == &pDbgc->achInput[sizeof(pDbgc->achInput)])
psz = &pDbgc->achInput[0];
if (psz == &pDbgc->achInput[pDbgc->iWrite])
{
AssertMsgFailed(("The buffer contains no commands while cInputLines=%d!\n", pDbgc->cInputLines));
pDbgc->cInputLines = 0;
return 0;
}
pszTrg++;
}
*pszTrg = '\0';
/*
* Advance the buffer.
*/
pDbgc->iRead = psz - &pDbgc->achInput[0];
if (ch == '\n')
pDbgc->cInputLines--;
/*
* Parse and execute this command.
*/
pDbgc->pszScratch = pszTrg + 1;
pDbgc->iArg = 0;
rc = dbgcEvalCommand(pDbgc, &pDbgc->achScratch[0], pszTrg - &pDbgc->achScratch[0] - 1, fNoExecute);
if ( rc == VERR_DBGC_QUIT
|| rc == VWRN_DBGC_CMD_PENDING)
break;
rc = VINF_SUCCESS; /* ignore other statuses */
}
return rc;
}