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110 lines
3.8 KiB
C
110 lines
3.8 KiB
C
#include "cli/argparse.h"
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#include "mapping/mappers.h"
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#include "lib/mlrutil.h"
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#include "containers/sllv.h"
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typedef struct _mapper_cat_state_t {
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ap_state_t* pargp;
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char* counter_field_name;
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unsigned long long counter;
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} mapper_cat_state_t;
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#define DEFAULT_COUNTER_FIELD_NAME "n"
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static void mapper_cat_usage(FILE* o, char* argv0, char* verb);
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static mapper_t* mapper_cat_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_cat_alloc(ap_state_t* pargp, int do_counters, char* counter_field_name);
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static void mapper_cat_free(mapper_t* pmapper);
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static sllv_t* mapper_cat_process(lrec_t* pinrec, context_t* pctx, void* pvstate);
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static sllv_t* mapper_catn_process(lrec_t* pinrec, context_t* pctx, void* pvstate);
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// ----------------------------------------------------------------
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mapper_setup_t mapper_cat_setup = {
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.verb = "cat",
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.pusage_func = mapper_cat_usage,
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.pparse_func = mapper_cat_parse_cli,
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.ignores_input = FALSE,
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};
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// ----------------------------------------------------------------
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static mapper_t* mapper_cat_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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char* default_counter_field_name = DEFAULT_COUNTER_FIELD_NAME;
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char* counter_field_name = NULL;
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int do_counters = FALSE;
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if ((argc - *pargi) < 1) {
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mapper_cat_usage(stderr, argv[0], argv[*pargi]);
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return NULL;
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}
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char* verb = argv[*pargi];
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*pargi += 1;
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ap_state_t* pstate = ap_alloc();
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ap_define_true_flag(pstate, "-n", &do_counters);
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ap_define_string_flag(pstate, "-N", &counter_field_name);
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if (!ap_parse(pstate, verb, pargi, argc, argv)) {
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mapper_cat_usage(stderr, argv[0], verb);
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return NULL;
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}
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if (counter_field_name != NULL) {
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do_counters = TRUE;
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} else if (do_counters) {
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counter_field_name = default_counter_field_name;
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}
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mapper_t* pmapper = mapper_cat_alloc(pstate, do_counters, counter_field_name);
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return pmapper;
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}
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static void mapper_cat_usage(FILE* o, char* argv0, char* verb) {
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fprintf(o, "Usage: %s %s [options]\n", argv0, verb);
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fprintf(o, "Passes input records directly to output. Most useful for format conversion.\n");
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fprintf(o, "Options:\n");
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fprintf(o, "-n Prepend field \"%s\" to each record with record-counter starting at 1\n",
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DEFAULT_COUNTER_FIELD_NAME);
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fprintf(o, "-N {name} Prepend field {name} to each record with record-counter starting at 1\n");
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}
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// ----------------------------------------------------------------
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static mapper_t* mapper_cat_alloc(ap_state_t* pargp, int do_counters, char* counter_field_name) {
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mapper_t* pmapper = mlr_malloc_or_die(sizeof(mapper_t));
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mapper_cat_state_t* pstate = mlr_malloc_or_die(sizeof(mapper_cat_state_t));
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pstate->pargp = pargp;
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pstate->counter_field_name = counter_field_name;
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pstate->counter = 0LL;
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pmapper->pvstate = pstate;
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pmapper->pprocess_func = do_counters ? mapper_catn_process : mapper_cat_process;
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pmapper->pfree_func = mapper_cat_free;
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return pmapper;
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}
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static void mapper_cat_free(mapper_t* pmapper) {
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mapper_cat_state_t* pstate = pmapper->pvstate;
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ap_free(pstate->pargp);
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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_cat_process(lrec_t* pinrec, context_t* pctx, void* pvstate) {
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if (pinrec != NULL)
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return sllv_single(pinrec);
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else
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return sllv_single(NULL);
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}
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// ----------------------------------------------------------------
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static sllv_t* mapper_catn_process(lrec_t* pinrec, context_t* pctx, void* pvstate) {
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mapper_cat_state_t* pstate = (mapper_cat_state_t*)pvstate;
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if (pinrec != NULL) {
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char* counter_field_value = mlr_alloc_string_from_ull(++pstate->counter);
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lrec_prepend(pinrec, pstate->counter_field_name, counter_field_value, FREE_ENTRY_VALUE);
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return sllv_single(pinrec);
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} else {
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return sllv_single(NULL);
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}
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}
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