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759bd017da
The following functions return immediately if a null pointer was passed. * hss_free * lhmsi_free * lhmslv_free * lhmsv_free * lrec_free It is therefore not needed that a function caller repeats a corresponding check. This issue was fixed by using the software Coccinelle 1.0.1. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
74 lines
2.8 KiB
C
74 lines
2.8 KiB
C
#include "lib/mlrutil.h"
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#include "containers/lhmslv.h"
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#include "containers/sllv.h"
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#include "containers/mixutil.h"
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#include "mapping/mappers.h"
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typedef struct _mapper_regularize_state_t {
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lhmslv_t* psorted_to_original;
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} mapper_regularize_state_t;
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// ----------------------------------------------------------------
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static sllv_t* mapper_regularize_process(lrec_t* pinrec, context_t* pctx, void* pvstate) {
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if (pinrec != NULL) {
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mapper_regularize_state_t* pstate = (mapper_regularize_state_t*)pvstate;
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slls_t* current_sorted_field_names = mlr_reference_keys_from_record(pinrec);
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slls_sort(current_sorted_field_names);
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slls_t* previous_sorted_field_names = lhmslv_get(pstate->psorted_to_original, current_sorted_field_names);
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if (previous_sorted_field_names == NULL) {
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previous_sorted_field_names = slls_copy(current_sorted_field_names);
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lhmslv_put(pstate->psorted_to_original, previous_sorted_field_names, mlr_copy_keys_from_record(pinrec));
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return sllv_single(pinrec);
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} else {
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lrec_t* poutrec = lrec_unbacked_alloc();
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for (sllse_t* pe = previous_sorted_field_names->phead; pe != NULL; pe = pe->pnext) {
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lrec_put(poutrec, pe->value, strdup(lrec_get(pinrec, pe->value)), LREC_FREE_ENTRY_VALUE);
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}
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lrec_free(pinrec);
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return sllv_single(poutrec);
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}
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}
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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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// ----------------------------------------------------------------
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static void mapper_regularize_free(void* pvstate) {
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mapper_regularize_state_t* pstate = (mapper_regularize_state_t*)pvstate;
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lhmslv_free(pstate->psorted_to_original);
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}
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static mapper_t* mapper_regularize_alloc() {
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mapper_t* pmapper = mlr_malloc_or_die(sizeof(mapper_t));
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mapper_regularize_state_t* pstate = mlr_malloc_or_die(sizeof(mapper_regularize_state_t));
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pstate->psorted_to_original = lhmslv_alloc();
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pmapper->pvstate = (void*)pstate;
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pmapper->pprocess_func = mapper_regularize_process;
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pmapper->pfree_func = mapper_regularize_free;
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return pmapper;
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}
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// ----------------------------------------------------------------
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static void mapper_regularize_usage(char* argv0, char* verb) {
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fprintf(stdout, "Usage: %s %s\n", argv0, verb);
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fprintf(stdout, "For records seen earlier in the data stream with same field names in a different order,\n");
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fprintf(stdout, "outputs them with field names in the previously encountered order.\n");
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fprintf(stdout, "Example: input records a=1,c=2,b=3, then e=4,d=5, then c=7,a=6,b=8\n");
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fprintf(stdout, "output as a=1,c=2,b=3, then e=4,d=5, then a=6,c=7,b=8\n");
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}
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static mapper_t* mapper_regularize_parse_cli(int* pargi, int argc, char** argv) {
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*pargi += 1;
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return mapper_regularize_alloc();
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}
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// ----------------------------------------------------------------
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mapper_setup_t mapper_regularize_setup = {
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.verb = "regularize",
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.pusage_func = mapper_regularize_usage,
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.pparse_func = mapper_regularize_parse_cli
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};
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