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Addition of a version of printf that can print to a DCB

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This commit is contained in:
Mark Riddoch 2013-06-15 12:12:21 +01:00
parent fad37adfbf
commit 939d2bf46c
2 changed files with 25 additions and 0 deletions
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24
core/dcb.c
View File

@ -26,6 +26,7 @@
*
*/
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <dcb.h>
@ -216,3 +217,26 @@ gw_dcb_state2string (int state) {
return "DCB (unknown)";
}
}
/*
* A DCB based wrapper for printf. Allows formattign printing to
* a descritor control block.
*
* @param dcb Descriptor to write to
* @param fmt A printf format string
* @param ... Variable arguments for the print format
*/
void
dcb_printf(DCB *dcb, const char *fmt, ...)
{
GWBUF *buf;
va_list args;
if ((buf = gwbuf_alloc(10240)) == NULL)
return;
va_start(args, fmt);
vsnprintf(GWBUF_DATA(buf), 10240, fmt, args);
va_end(args);
dcb->func.write(dcb, buf);
}

1
include/dcb.h
View File

@ -106,5 +106,6 @@ extern DCB *connect_dcb(struct server *, struct session *, const char *);
extern void printAllDCBs(); /* Debug to print all DCB in the system */
extern void printDCB(DCB *); /* Debug print routine */
extern const char *gw_dcb_state2string(int); /* DCB state to string */
extern void dcb_printf(DCB *, const char *, ...); /* DCB version of printf */
#endif