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[parseopt] Add parse_timeout()

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Parsing a timeout value (specified in milliseconds) into an internal
timeout value measured in timer ticks is a common operation.  Provide
a parse_timeout() value to carry out this conversion automatically.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2013-11-01 02:22:12 +00:00
parent b15dbc9cc6
commit 5e1fa5cd40
12 changed files with 46 additions and 27 deletions
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22
src/core/parseopt.c
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@@ -30,6 +30,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
#include <ipxe/menu.h>
#include <ipxe/settings.h>
#include <ipxe/params.h>
#include <ipxe/timer.h>
#include <ipxe/parseopt.h>
/** @file
@@ -95,6 +96,27 @@ int parse_integer ( char *text, unsigned int *value ) {
return 0;
}
/**
* Parse timeout value (in ms)
*
* @v text Text
* @ret value Integer value
* @ret rc Return status code
*/
int parse_timeout ( char *text, unsigned long *value ) {
unsigned int value_ms;
int rc;
/* Parse raw integer value */
if ( ( rc = parse_integer ( text, &value_ms ) ) != 0 )
return rc;
/* Convert to a number of timer ticks */
*value = ( ( value_ms * TICKS_PER_SEC ) / 1000 );
return 0;
}
/**
* Parse network device name
*