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101 lines
3.6 KiB
C
101 lines
3.6 KiB
C
#include "lib/mlrutil.h"
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#include "containers/lrec.h"
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#include "lib/mvfuncs.h"
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#include "containers/slls.h"
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#include "containers/mixutil.h"
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#include "mapping/mappers.h"
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typedef struct _mapper_sec2gmtdate_state_t {
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slls_t* pfield_names;
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} mapper_sec2gmtdate_state_t;
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static void mapper_sec2gmtdate_usage(FILE* o, char* argv0, char* verb);
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static mapper_t* mapper_sec2gmtdate_parse_cli(int* pargi, int argc, char** argv,
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cli_reader_opts_t* _, cli_writer_opts_t* __);
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static mapper_t* mapper_sec2gmtdate_alloc(slls_t* pfield_names);
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static void mapper_sec2gmtdate_free(mapper_t* pmapper, context_t* _);
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static sllv_t* mapper_sec2gmtdate_process(lrec_t* pinrec, context_t* pctx, void* pvstate);
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// ----------------------------------------------------------------
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mapper_setup_t mapper_sec2gmtdate_setup = {
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.verb = "sec2gmtdate",
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.pusage_func = mapper_sec2gmtdate_usage,
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.pparse_func = mapper_sec2gmtdate_parse_cli,
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.ignores_input = FALSE,
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};
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// ----------------------------------------------------------------
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static void mapper_sec2gmtdate_usage(FILE* o, char* argv0, char* verb) {
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fprintf(o, "Usage: %s %s {comma-separated list of field names}\n", argv0, verb);
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fprintf(o, "Replaces a numeric field representing seconds since the epoch with the\n");
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fprintf(o, "corresponding GMT year-month-day timestamp; leaves non-numbers as-is.\n");
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fprintf(o, "This is nothing more than a keystroke-saver for the sec2gmtdate function:\n");
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fprintf(o, " %s %s time1,time2\n", argv0, verb);
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fprintf(o, "is the same as\n");
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fprintf(o, " %s put '$time1=sec2gmtdate($time1);$time2=sec2gmtdate($time2)'\n", argv0);
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}
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// ----------------------------------------------------------------
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static mapper_t* mapper_sec2gmtdate_parse_cli(int* pargi, int argc, char** argv,
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cli_reader_opts_t* _, cli_writer_opts_t* __)
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{
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if ((argc - *pargi) < 2) {
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mapper_sec2gmtdate_usage(stderr, argv[0], argv[*pargi]);
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return NULL;
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}
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// verb:
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(*pargi)++;
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// field names:
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char* field_names_string = argv[(*pargi)++];
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slls_t* pfield_names = slls_from_line(field_names_string, ',', FALSE);
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return mapper_sec2gmtdate_alloc(pfield_names);
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}
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// ----------------------------------------------------------------
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static mapper_t* mapper_sec2gmtdate_alloc(slls_t* pfield_names)
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{
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mapper_t* pmapper = mlr_malloc_or_die(sizeof(mapper_t));
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mapper_sec2gmtdate_state_t* pstate = mlr_malloc_or_die(sizeof(mapper_sec2gmtdate_state_t));
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pstate->pfield_names = pfield_names;
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pmapper->pprocess_func = mapper_sec2gmtdate_process;
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pmapper->pvstate = (void*)pstate;
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pmapper->pfree_func = mapper_sec2gmtdate_free;
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return pmapper;
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}
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static void mapper_sec2gmtdate_free(mapper_t* pmapper, context_t* _) {
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mapper_sec2gmtdate_state_t* pstate = pmapper->pvstate;
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slls_free(pstate->pfield_names);
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free(pstate);
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free(pmapper);
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}
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// ----------------------------------------------------------------
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static sllv_t* mapper_sec2gmtdate_process(lrec_t* pinrec, context_t* pctx, void* pvstate) {
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if (pinrec == NULL) // end of stream
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return sllv_single(NULL);
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mapper_sec2gmtdate_state_t* pstate = (mapper_sec2gmtdate_state_t*)pvstate;
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for (sllse_t* pe = pstate->pfield_names->phead; pe != NULL; pe = pe->pnext) {
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char* name = pe->value;
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char* sval = lrec_get(pinrec, name);
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if (sval == NULL)
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continue;
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if (*sval == 0) {
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lrec_put(pinrec, name, "", NO_FREE);
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} else {
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mv_t mval = mv_scan_number_nullable(sval);
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if (!mv_is_error(&mval)) {
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mv_t stamp = time_string_from_seconds(&mval, ISO8601_DATE_FORMAT,
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TIMEZONE_HANDLING_GMT);
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lrec_put(pinrec, name, stamp.u.strv, FREE_ENTRY_VALUE);
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}
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}
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}
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return sllv_single(pinrec);
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}
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