mirror of
https://github.com/johnkerl/miller.git
synced 2026-07-22 07:30:43 +00:00
98 lines
3.3 KiB
C
98 lines
3.3 KiB
C
#include "lib/mlrutil.h"
|
|
#include "containers/lrec.h"
|
|
#include "containers/slls.h"
|
|
#include "containers/mixutil.h"
|
|
#include "mapping/mappers.h"
|
|
|
|
typedef struct _mapper_sec2gmt_state_t {
|
|
slls_t* pfield_names;
|
|
} mapper_sec2gmt_state_t;
|
|
|
|
static sllv_t* mapper_sec2gmt_process(lrec_t* pinrec, context_t* pctx, void* pvstate);
|
|
static void mapper_sec2gmt_free(void* pvstate);
|
|
static mapper_t* mapper_sec2gmt_alloc(slls_t* pfield_names);
|
|
static void mapper_sec2gmt_usage(FILE* o, char* argv0, char* verb);
|
|
static mapper_t* mapper_sec2gmt_parse_cli(int* pargi, int argc, char** argv);
|
|
|
|
// ----------------------------------------------------------------
|
|
mapper_setup_t mapper_sec2gmt_setup = {
|
|
.verb = "sec2gmt",
|
|
.pusage_func = mapper_sec2gmt_usage,
|
|
.pparse_func = mapper_sec2gmt_parse_cli,
|
|
};
|
|
|
|
// ----------------------------------------------------------------
|
|
static void mapper_sec2gmt_usage(FILE* o, char* argv0, char* verb) {
|
|
fprintf(o, "Usage: %s %s {comma-separated list of field names}\n", argv0, verb);
|
|
fprintf(o, "Replaces a numeric field representing seconds since the epoch with the\n");
|
|
fprintf(o, "corresponding GMT timestamp. This is nothing more than a keystroke-saver for\n");
|
|
fprintf(o, "the sec2gmt function:\n");
|
|
fprintf(o, " %s %s time1,time2\n", argv0, verb);
|
|
fprintf(o, "is the same as\n");
|
|
fprintf(o, " %s put '$time1=sec2gmt($time1);$time2=sec2gmt($time2)'\n", argv0);
|
|
}
|
|
|
|
// ----------------------------------------------------------------
|
|
static mapper_t* mapper_sec2gmt_parse_cli(int* pargi, int argc, char** argv) {
|
|
if ((argc - *pargi) < 2) {
|
|
mapper_sec2gmt_usage(stderr, argv[0], argv[*pargi]);
|
|
return NULL;
|
|
}
|
|
// verb:
|
|
(*pargi)++;
|
|
// field names:
|
|
char* field_names_string = argv[(*pargi)++];
|
|
slls_t* pfield_names = slls_from_line(field_names_string, ',', FALSE);
|
|
|
|
return mapper_sec2gmt_alloc(pfield_names);
|
|
}
|
|
|
|
// ----------------------------------------------------------------
|
|
static mapper_t* mapper_sec2gmt_alloc(slls_t* pfield_names)
|
|
{
|
|
mapper_t* pmapper = mlr_malloc_or_die(sizeof(mapper_t));
|
|
|
|
mapper_sec2gmt_state_t* pstate = mlr_malloc_or_die(sizeof(mapper_sec2gmt_state_t));
|
|
pstate->pfield_names = pfield_names;
|
|
pmapper->pprocess_func = mapper_sec2gmt_process;
|
|
pmapper->pvstate = (void*)pstate;
|
|
pmapper->pfree_func = mapper_sec2gmt_free;
|
|
|
|
return pmapper;
|
|
}
|
|
|
|
static void mapper_sec2gmt_free(void* pvstate) {
|
|
mapper_sec2gmt_state_t* pstate = (mapper_sec2gmt_state_t*)pvstate;
|
|
slls_free(pstate->pfield_names);
|
|
}
|
|
|
|
// ----------------------------------------------------------------
|
|
static sllv_t* mapper_sec2gmt_process(lrec_t* pinrec, context_t* pctx, void* pvstate) {
|
|
if (pinrec == NULL) // end of stream
|
|
return sllv_single(NULL);
|
|
|
|
mapper_sec2gmt_state_t* pstate = (mapper_sec2gmt_state_t*)pvstate;
|
|
|
|
for (sllse_t* pe = pstate->pfield_names->phead; pe != NULL; pe = pe->pnext) {
|
|
char* name = pe->value;
|
|
char* sval = lrec_get(pinrec, name);
|
|
if (sval == NULL)
|
|
continue;
|
|
|
|
if (*sval == 0) {
|
|
lrec_put_no_free(pinrec, name, "");
|
|
} else {
|
|
double dval = mlr_double_from_string_or_die(sval);
|
|
|
|
// xxx make mlrutil func
|
|
time_t clock = (time_t) dval;
|
|
struct tm tm;
|
|
struct tm *ptm = gmtime_r(&clock, &tm);
|
|
char* stamp = mlr_malloc_or_die(32);
|
|
(void)strftime(stamp, 32, "%Y-%m-%dT%H:%M:%SZ", ptm);
|
|
|
|
lrec_put(pinrec, name, stamp, LREC_FREE_ENTRY_VALUE);
|
|
}
|
|
}
|
|
return sllv_single(pinrec);
|
|
}
|