Strtok delimited behavior
Below is a code snippet.
#define TABLE_DELIMITER "::"
int parse_n_store ( char *line )
{
int i = 0;
char *p = NULL;
CPTR sensor_number = NULL , event_catagory = NULL, sensor_type = NULL, event_state= NULL, assertion = NULL, message_number = NULL, short_text = NULL;
for (p = strtok(line,TABLE_DELIMITER); p != NULL; p = strtok(NULL, TABLE_DELIMITER), i++ )
{
if ( i == 0 )
sensor_number=p;
else if ( i == 1 )
sensor_type = p;
else if ( i == 2 )
event_catagory = p;
else if ( i == 3 )
event_state = p;
else if ( i == 4 )
assertion = p;
else if ( i == 5 )
message_number = p;
else if ( i == 6 )
short_text = p;
}
printf ("%s %s %s %s %s %s %s\n", sensor_number, event_catagory, sensor_type, event_state, assertion, message_number, short_text);
}
This works great. But, when the argument "string" is "Front Panel Memory Status: Recoverable ECC Patch / Other Patch Error Detected, Sensor (70, Memory)"
The output will be
70 SENSOR_SPECIFIC MEMORY STATE_00 True 8543 Front panel memory status
where the variable short_text contains only "Front panel memory status" instead of "Front panel memory status: detected Fixed ECC patch / other correctable memory error, sensor (70, Memory)"
Why does strtok treat a single colon as a separator? Can anyone solve this problem.
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Why does strtok treat a single colon as a separator?
Because it is specified in the standard (C11):
7.24.5.8 strtok function
[...]
- The sequence of calls to the strtok function interrupts the string pointed to by s1 into a sequence of tokens, each delimited by a character from the string pointed to by s2. The first call in the sequence has a nonzero first argument; subsequent calls to Sequence have a zero first argument. The delimiter string pointed to by s2 can be different from call to call.
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You can try strstr
to iterate through a string as it can search for a substring.
You can define (beware of unverified):
char *strmtok(char *s, char *delim) {
static char *current = NULL;
char *ix, *cr;
if (s != NULL) {
current = s;
}
ix = strstr(current, delim);
if (ix == NULL) return NULL;
cr = current;
current = ix + strlen(delim);
*ix = '\0';
return cr;
}
and use that as a replacement for the original strtok.
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