Intento de poner a andar el ZG.

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

diff --git a/src/jacu.c b/src/jacu.c
index ab4c79d7e8330f74df6d111f0cb728bdb59d7732..599d63630d8a06067a2c3d0eb47ee80bce4a7e9b 100644 (file)
--- a/src/jacu.c
+++ b/src/jacu.c
@@ -84,7 +84,7 @@ int main(int argc, char* argv[])
        }
                
        if ( (argc == 1) || (cflag & dflag) || !(cflag | dflag) || ((argc - optind) < 2) || (mflag & sflag)) {
-               fprintf(stderr, "Usage: %s [-cdzs][-q blksize][-t volsize][-m modeldumpfile] source target\n", argv[0]); 
+               fprintf(stderr, "Usage: %s [-cdzs][-q compressionquality][-t volsize][-m modeldumpfile] source target\n", argv[0]); 
                return (3);
        }
        if ((tflag) && (volumesize <= 0l)) {
@@ -120,6 +120,10 @@ int main(int argc, char* argv[])
                /* Guardamos el pagesize como header (huffencoded) */
                shuff_scanfreq_chunk(shuff,(char*)&pagesize,sizeof(size_t));
 
+               /* Guardamos cabecera para indicar si usamos ZG (huffencoded) */
+               if (zflag) shuff_scanfreq_chunk(shuff, "\001", 1);
+               else       shuff_scanfreq_chunk(shuff, "\000", 1);
+
                total = 0;
                while (!feof(fp)) {
                        i = 0;
@@ -136,23 +140,25 @@ int main(int argc, char* argv[])
 
                        /* Le aplico el MTF a salida */
                        mtf = jacu_mtf(salida, i+sizeof(Uint32), &z, &z_len);
+
+                       /* Guardo el z_len y el Z */
+                       shuff_scanfreq_chunk(shuff,(char*)&z_len,sizeof(int));
+                       shuff_scanfreq_chunk(shuff,z,z_len);
                        
                        /* Si me lo piden, aplico ZG. */
                        if (zflag) {
                                size_t len;
                                char buff[2];
+                               Uint32 total_size = i + sizeof(Uint32);
                                ZG zg;
                                zg_init(&zg);
-                               /* TODO HACER LO MISMO QUE EN EL ELSE XXX */
-                               for (j = 0; j < i; ++j)
-                                       if ((len = zg_group(&zg, buff, mtf[j]))) shuff_scanfreq_chunk(shuff,buff,len);
-                       } else {                        
-                               /* Comprimo el Z len y el Z */
-                               shuff_scanfreq_chunk(shuff,(char*)&z_len,sizeof(int));
-                               shuff_scanfreq_chunk(shuff,z,z_len);                                                            
-
+                               /* Guardo la salida del MTF con ceros agrupados (ZG) */
+                               for (j = 0; j < total_size; ++j)
+                                       if ((len = zg_group(&zg, buff, mtf[j])))
+                                               shuff_scanfreq_chunk(shuff, buff, len);
+                       } else {
                                /* Comprimo la salida del MTF */                                
-                               shuff_scanfreq_chunk(shuff,mtf,i+sizeof(Uint32));                               
+                               shuff_scanfreq_chunk(shuff,mtf,i+sizeof(Uint32));
                        }
                        free(mtf);
                        free(z);
@@ -182,6 +188,7 @@ int main(int argc, char* argv[])
                unsigned char *block, *mtf, *orig;
                unsigned char *z;
                int z_len,moredata = 0,decoded = 0;
+               char use_zg;
 
                /* Inicializo el descompresor */
                if ((shuff = shuff_init_decoder(argv[optind],NULL)) == NULL) return 1;
@@ -191,6 +198,11 @@ int main(int argc, char* argv[])
                
                /* Descomprimo primero que nada el pagesize utilizado para comprimir */
                if (!(moredata = shuff_decode_chunk(shuff,(char*)&block_size,sizeof(Uint32),&decoded))) return 1;
+
+               /* Descomprimo byte que indica si se usa ZG */
+               if (!(moredata = shuff_decode_chunk(shuff, &use_zg, 1, &decoded))) return 1;
+
+               /* Creo buffers */
                block = malloc(block_size*sizeof(unsigned char)+sizeof(Uint32));
                orig = malloc(block_size*sizeof(unsigned char));