Reemplazo printf() por fprintf(stderr) para hacer pruebas.

[z.facultad/75.06/jacu.git] / otros / blocksorting / bs.c

diff --git a/otros/blocksorting/bs.c b/otros/blocksorting/bs.c
index 61dfb78d6a51e38f8d798abea2f61675849a2e29..bf39971012a9e72b11718c2fe7b923d792104700 100644 (file)
--- a/otros/blocksorting/bs.c
+++ b/otros/blocksorting/bs.c
@@ -1,22 +1,21 @@
 
+#include "bs.h"
+
 /* Block Sorting Optimizado en memoria! */
 
-#include <string.h>
-#include <stdlib.h>
-#include <stdio.h>
+typedef struct _bs_decode_t_ {
+       char c;
+       unsigned long int pos;
+} t_BlockSortDecode;
+
+int _compare(const void *d1, const void *d2) {
+       t_BlockSortDecode *s1, *s2;
 
-typedef struct _bs_data_t_ {
-       unsigned long int pos_inicial;
-       unsigned long int pos_final;
-       unsigned long int pos_orden;
-       char ord; /* indice si esta ordenada */
-} t_BlockSortData;
+       s1 = (t_BlockSortDecode *)d1;
+       s2 = (t_BlockSortDecode *)d2;
 
-typedef struct _bs_t_ {
-       t_BlockSortData *array;
-       unsigned long int *ord;
-       unsigned long int len;
-} t_BlockSort;
+       return (s1->c - s2->c);
+}
 
 char es_menor(char *data, t_BlockSort *bs, int i, int j)
 {
@@ -88,7 +87,30 @@ void bs_solve(char *in, char *out, t_BlockSort *bs, unsigned long int *k, unsign
        bs->len = l;
 }
 
-t_BlockSort *bs_create(unsigned int len)
+void bs_restore(char *dst, char *c, unsigned long int k, unsigned long int len)
+{
+       unsigned long int i, current;
+       t_BlockSortDecode *in;
+
+       in = malloc(sizeof(t_BlockSortDecode)*len);
+
+       for(i=0; i<len; i++) {
+               in[i].c = c[i];
+               in[i].pos = i;
+       }
+
+       qsort(in, len, sizeof(t_BlockSortDecode), _compare);
+       
+       current = k;
+       i=0;
+       do {
+               dst[i++] = in[current].c;
+               current = in[current].pos;
+       } while (current != k);
+       free(in);
+}
+
+t_BlockSort *bs_create(unsigned long int len)
 {
        t_BlockSort *tmp;
 
@@ -108,44 +130,3 @@ void bs_destroy(t_BlockSort *bs)
        free(bs);
 }
 
-int main(int argc, char *argv[])
-{
-       char *data; 
-       char *salida;
-       unsigned long int len, i, k;
-       FILE *fp;
-       char c;
-       t_BlockSort *bs;
-
-       if (argc != 3) {
-               printf("Modo de uso : %s <archivo datos> <tamaño pagina>\n", argv[0]);
-               return 0;
-       }
-
-       fp = fopen(argv[1], "r");
-       len = atoi(argv[2]);
-
-       data = malloc(sizeof(char)*len);
-       salida = malloc(sizeof(char)*len);
-
-       bs = bs_create(len);
-
-       while ((c = fgetc(fp)) != EOF) {
-               i = 0;
-               while ((c!=EOF) && (i < len)) {
-                       data[i++] = c;
-                       c = fgetc(fp);
-               }
-               bs_solve(data, salida, bs, &k, i);
-
-               /* XXX ACA SALIDA DEBERIA PASAR A LA SIGUIENTE ETAPA XXX */
-       }
-       fclose(fp);
-       bs_destroy(bs);
-
-       free(data);
-       free(salida);
-       return 0;
-}
-
-