Agrego descompresor. No funciona porque me esta faltando el vector "pos" del MTF...

[z.facultad/75.06/jacu.git] / src / jacu.c

diff --git a/src/jacu.c b/src/jacu.c
index 8e748122f4e123061de97246fabb8d3aa1a18b23..3d18ed3be44af85c1c97ae75db13ec99fe6283ff 100644 (file)
--- a/src/jacu.c
+++ b/src/jacu.c
@@ -58,14 +58,16 @@ int main(int argc, char* argv[])
                /* No me gusta el tmpfile ... es para probar como anda todo junto */
                FILE *fp, *fp_out;
                unsigned long int i, j, total, k;
-               int *mtf;
+               char *mtf;
                char *salida, *data, c;
                data = malloc(sizeof(char)*pagesize);
-               /* Reservo lugar tambien para guardar el k */
+               /* Reservo lugar tambien para guardar el k y el tamaño  */
                salida = malloc(sizeof(char)*(pagesize)+sizeof(unsigned long int)*2);
                bs = bs_create(pagesize);
+
                fp = fopen(argv[optind], "rb");
                fp_out = fopen("tmp.comp", "wb");
+
                c = fgetc(fp);
                total = 0;
                while (!feof(fp)) {
@@ -75,17 +77,25 @@ int main(int argc, char* argv[])
                                c = fgetc(fp);
                                total++;
                        }
+
                        /* Hago el BS */
                        bs_solve(data, salida, bs, &k, i);
-                       /* Le aplico el MTF */
-                       mtf = jacu_mtf(salida, i+sizeof(unsigned long int)*2);
+
+                       /* Le aplico el MTF, salteo el tamaño del bloque para que no se pierda. */
+                       mtf = jacu_mtf(salida+sizeof(unsigned long int), i+sizeof(unsigned long int));
                        for(j=0; j<i; j++)
                                fputc(mtf[j], fp_out);
+                       free(mtf);
                }
+
+               /* Limpiando */
                fclose(fp);
                fclose(fp_out);
                bs_destroy(bs);
+
+               /* Comprimo con huffman */
                i = shuff_encode_file("tmp.comp",argv[optind+1], volumesize);
+
                /* borro el temporal */
                unlink("tmp.comp");
                return i;
@@ -93,8 +103,39 @@ int main(int argc, char* argv[])
        
        if (dflag == 1) { 
                /* Descomprimo */
-               return shuff_decode_file(argv[optind],argv[optind+1]);
+               FILE *fp_out;
+               VFILE *fp_in;
+               unsigned long int block_size, k;
+               char *block, *mtf, *orig;
+               int *pos;
+
+               shuff_decode_file(argv[optind], "tmp.comp"); /*argv[optind+1]);*/
+               fp_in = vfopen("tmp.comp", "r", 0);
+               fp_out = fopen(argv[optind+1], "wb");
+
+               while (!vfeof(fp_in)) {
+                       block_size = 0;
+                       vfread(&block_size, sizeof(unsigned long int), 1, fp_in);
+                       if (block_size > 0) {
+                               block = malloc((block_size+sizeof(unsigned long int))*sizeof(char));
+                               orig = malloc(block_size*sizeof(char));
+                               vfread(block, block_size, sizeof(char), fp_in);
+
+                               mtf = jacu_mtf_inv(block, /*XXX NO LO TENGO XXX */pos, block_size);
+
+                               memcpy(&k, block, sizeof(unsigned long int));
+
+                               bs_restore(orig, block+sizeof(unsigned long int), k, block_size);
+
+                               fwrite(orig, block_size, sizeof(char), fp_out);
+                               free(block);
+                               free(orig);
+                               free(mtf);
+                       }
+               }
+               vfclose(fp_in);
+               fclose(fp_out);
        }
-               
+
        return 0;
 }