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85 lines
2.7 KiB
C
85 lines
2.7 KiB
C
#include "lib/mlrutil.h"
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#include "containers/lhmss.h"
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#include "containers/sllv.h"
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#include "mapping/mappers.h"
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typedef struct _mapper_rename_state_t {
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lhmss_t* pold_to_new;
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} mapper_rename_state_t;
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static sllv_t* mapper_rename_process(lrec_t* pinrec, context_t* pctx, void* pvstate);
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static void mapper_rename_free(void* pvstate);
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static mapper_t* mapper_rename_alloc(lhmss_t* pold_to_new);
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static void mapper_rename_usage(FILE* o, char* argv0, char* verb);
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static mapper_t* mapper_rename_parse_cli(int* pargi, int argc, char** argv);
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// ----------------------------------------------------------------
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mapper_setup_t mapper_rename_setup = {
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.verb = "rename",
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.pusage_func = mapper_rename_usage,
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.pparse_func = mapper_rename_parse_cli
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};
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// ----------------------------------------------------------------
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static sllv_t* mapper_rename_process(lrec_t* pinrec, context_t* pctx, void* pvstate) {
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if (pinrec != NULL) {
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mapper_rename_state_t* pstate = (mapper_rename_state_t*)pvstate;
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for (lhmsse_t* pe = pstate->pold_to_new->phead; pe != NULL; pe = pe->pnext) {
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char* old_name = pe->key;
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char* new_name = pe->value;
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char* value = lrec_get(pinrec, old_name);
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if (value != NULL) {
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lrec_rename(pinrec, old_name, new_name);
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}
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}
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return sllv_single(pinrec);
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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_rename_free(void* pvstate) {
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mapper_rename_state_t* pstate = (mapper_rename_state_t*)pvstate;
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lhmss_free(pstate->pold_to_new);
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}
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static mapper_t* mapper_rename_alloc(lhmss_t* pold_to_new) {
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mapper_t* pmapper = mlr_malloc_or_die(sizeof(mapper_t));
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mapper_rename_state_t* pstate = mlr_malloc_or_die(sizeof(mapper_rename_state_t));
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pstate->pold_to_new = pold_to_new;
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pmapper->pvstate = (void*)pstate;
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pmapper->pprocess_func = mapper_rename_process;
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pmapper->pfree_func = mapper_rename_free;
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return pmapper;
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}
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// ----------------------------------------------------------------
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static void mapper_rename_usage(FILE* o, char* argv0, char* verb) {
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fprintf(o, "Usage: %s %s {old1,new1,old2,new2,...}\n", argv0, verb);
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fprintf(o, "Renames specified fields.\n");
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}
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static mapper_t* mapper_rename_parse_cli(int* pargi, int argc, char** argv) {
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if ((argc - *pargi) < 2) {
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mapper_rename_usage(stderr, argv[0], argv[*pargi]);
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return NULL;
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}
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slls_t* pnames = slls_from_line(argv[*pargi+1], ',', FALSE);
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if ((pnames->length % 2) != 0) {
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mapper_rename_usage(stderr, argv[0], argv[*pargi]);
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return NULL;
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}
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lhmss_t* pold_to_new = lhmss_alloc();
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for (sllse_t* pe = pnames->phead; pe != NULL; pe = pe->pnext->pnext) {
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lhmss_put(pold_to_new, pe->value, pe->pnext->value);
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}
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*pargi += 2;
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return mapper_rename_alloc(pold_to_new);
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}
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