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Added string processing capability to cron code.

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This commit is contained in:
Adam Sutton 2012-06-01 10:33:58 +01:00
parent ba9edf7287
commit 3eacec0e63
2 changed files with 99 additions and 4 deletions
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88
src/cron.c
View file

@ -1,5 +1,93 @@
#include "cron.h"
#include <time.h>
#include <stdio.h>
static int _field_to_string
( char *out, uint64_t field, uint64_t mask, int offset )
{
int i, cnt = 0, first = 1, start = -1;
field &= mask;
/* Star */
if ( field == mask )
return sprintf(out, "*");
for ( i = 0; i < 64; i++ ) {
int b = (field >> i) & 0x1;
if ( !b & start != -1 ) {
if (!first)
cnt += sprintf(out+cnt, ",");
first = 0;
cnt += sprintf(out+cnt, "%d", start + offset);
if (i != (start+1))
cnt += sprintf(out+cnt, "-%d", (i - 1) + offset);
start = -1;
} else if ( b & start == -1 )
start = i;
}
return cnt;
}
static int _field_from_string
( const char *str, uint64_t *field, uint64_t mask, int offset )
{
int i = 0, j = 0, sn = -1, en = -1;
*field = 0;
while ( str[i] != '\0' ) {
if ( str[i] == '*' ) *field = mask;
else if ( str[i] == ',' || str[i] == ' ' ) {
sscanf(str+j, "%d", sn == -1 ? &sn : &en);
if (en == -1) en = sn;
while (sn <= en) {
*field |= (0x1LL << (sn - offset));
sn++;
}
j = i+1;
sn = -1;
en = -1;
if (str[i] == ' ') break;
} else if ( str[i] == '-' ) {
sscanf(str+j, "%d", &sn);
j = i+1;
en = 64;
}
i++;
}
if (str[i] == ' ') i++;
*field &= mask;
return i;
}
void cron_to_string ( cron_t *cron, char *str )
{
int i = 0;
i += _field_to_string(str+i, cron->min, CRON_MIN_MASK, 0);
i += sprintf(str+i, " ");
i += _field_to_string(str+i, cron->hour, CRON_HOUR_MASK, 0);
i += sprintf(str+i, " ");
i += _field_to_string(str+i, cron->dom, CRON_DOM_MASK, 1);
i += sprintf(str+i, " ");
i += _field_to_string(str+i, cron->mon, CRON_MON_MASK, 1);
i += sprintf(str+i, " ");
i += _field_to_string(str+i, cron->dow, CRON_DOW_MASK, 0);
}
void cron_from_string ( cron_t *cron, const char *str )
{
int i = 0;
uint64_t u64;
i += _field_from_string(str+i, &u64, CRON_MIN_MASK, 0);
cron->min = u64;
i += _field_from_string(str+i, &u64, CRON_HOUR_MASK, 0);
cron->hour = (uint32_t)u64;
i += _field_from_string(str+i, &u64, CRON_DOM_MASK, 1);
cron->dom = (uint32_t)u64;
i += _field_from_string(str+i, &u64, CRON_MON_MASK, 1);
cron->mon = (uint16_t)u64;
i += _field_from_string(str+i, &u64, CRON_DOW_MASK, 0);
cron->dow = (uint8_t)u64;
}
int cron_is_time ( cron_t *cron )
{

15
src/cron.h
View file

@ -5,6 +5,12 @@
#include <sys/types.h>
#include "htsmsg.h"
#define CRON_MIN_MASK 0x0FFFFFFFFFFFFFFFLL // 60 bits
#define CRON_HOUR_MASK 0x00FFFFFF // 24 bits
#define CRON_DOM_MASK 0x7FFFFFFF // 31 bits
#define CRON_MON_MASK 0x0FFF // 12 bits
#define CRON_DOW_MASK 0xFF // 8 bits (allow 0/7 for sunday)
typedef struct cron
{
uint64_t min; ///< Minutes
@ -14,9 +20,10 @@ typedef struct cron
uint8_t dow; ///< Day of week
} cron_t;
void cron_set_string ( cron_t *cron, const char *str );
int cron_is_time ( cron_t *cron );
void cron_pack ( cron_t *cron, htsmsg_t *msg );
void cron_unpack ( cron_t *cron, htsmsg_t *msg );
void cron_to_string ( cron_t *cron, char *str );
void cron_from_string ( cron_t *cron, const char *str );
int cron_is_time ( cron_t *cron );
void cron_pack ( cron_t *cron, htsmsg_t *msg );
void cron_unpack ( cron_t *cron, htsmsg_t *msg );
#endif /* __CRON_H__ */