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

diff --git a/src/jacu.c b/src/jacu.c
index ab4c79d7e8330f74df6d111f0cb728bdb59d7732..75ca87ccadfeccf070a53fdaf7b7194be5ed85f3 100644 (file)
--- a/src/jacu.c
+++ b/src/jacu.c
@@ -10,48 +10,55 @@
 #include <stdio.h>
 #include <unistd.h>
 
 #include <stdio.h>
 #include <unistd.h>
 

-long get_file_size(const char* filename);
+long fsize(const char* filename);
+
+typedef struct _flags_ {
+       int cflag;
+       int dflag;
+       int zflag;
+       int tflag;
+       int qflag;
+       int sflag;
+       int mflag;
+} t_Flags;
+
+int comprimir(char *src, char *dst, Uint32 pagesize, Uint32 volumesize, t_Flags *flags, char *staticmodel);
+int descomprimir(char *src, char *dst);

 
 int main(int argc, char* argv[])
 {      
 
 int main(int argc, char* argv[])
 {      

-       int cflag = 0;
-       int dflag = 0;
-       int zflag = 0;
-       int tflag = 0;
-       int qflag = 0;
-       int sflag = 0;
-       int mflag = 0;

        long int volumesize = 0;
        long int volumesize = 0;

-       size_t pagesize = 32768; /* 32KB */
+       Uint32 pagesize = 32768; /* 32KB */

        int ch;
        int ch;

-       t_BlockSort *bs;
-       HUFF_STATE *shuff;
+       t_Flags flags;

        char *staticmodel = NULL;
                        
        char *staticmodel = NULL;
                        

+       memset(&flags, 0, sizeof(t_Flags));
+

        while ((ch = getopt(argc, argv, "scdzm:t:q:")) != -1) { 
                 
                switch (ch) { 
        while ((ch = getopt(argc, argv, "scdzm:t:q:")) != -1) { 
                 
                switch (ch) { 

-                       case 'c': cflag = 1; 
+                       case 'c': flags.cflag = 1; 

                                          break;
 
                                          break;
 

-                       case 'd': dflag = 1; 
+                       case 'd': flags.dflag = 1; 

                                          break; 
 
                                          break; 
 

-                       case 'z': zflag = 1; 
+                       case 'z': flags.zflag = 1; 

                                          break; 
                        
                                          break; 
                        

-                       case 'm': mflag = 1;
+                       case 'm': flags.mflag = 1;

                                          staticmodel = optarg;
                                          break; 
                        
                                          staticmodel = optarg;
                                          break; 
                        

-                       case 's': sflag = 1;                                      
+                       case 's': flags.sflag = 1;                                        

                                          break;
 
                                          break;
 

-                       case 't': tflag = 1; 
+                       case 't': flags.tflag = 1; 

                                volumesize = atol(optarg);
                                break; 
 
                                volumesize = atol(optarg);
                                break; 
 

-                       case 'q': qflag = 1; 
+                       case 'q': flags.qflag = 1; 

                                switch (atoi(optarg))
                                {
                                        case 0: pagesize = 1024; /* 1K */
                                switch (atoi(optarg))
                                {
                                        case 0: pagesize = 1024; /* 1K */


@@ -83,162 +90,225 @@ 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]); 
+       if ( (argc == 1) || (flags.cflag & flags.dflag) || !(flags.cflag | flags.dflag) || ((argc - optind) < 2) || (flags.mflag & flags.sflag)) {
+               fprintf(stderr, "Usage: %s [-cdzs][-q compressionquality][-t volsize][-m modeldumpfile] source target\n", argv[0]); 

                return (3);
        }
                return (3);
        }

-       if ((tflag) && (volumesize <= 0l)) {
+       if ((flags.tflag) && (volumesize <= 0l)) {

                fprintf(stderr,"Error: The volume size must be a non-zero value\n");
                return (4);
        }
                fprintf(stderr,"Error: The volume size must be a non-zero value\n");
                return (4);
        }

-       if ((qflag) && (pagesize <= 1u)) {
+       if ((flags.qflag) && (pagesize <= 1u)) {

                fprintf(stderr,"Error: El nivel de compresión debe ser entre 0 (menor) y 9 (mayor).\n");
                return (5);
        }
                
                fprintf(stderr,"Error: El nivel de compresión debe ser entre 0 (menor) y 9 (mayor).\n");
                return (5);
        }
                

-       if (cflag == 1) {
-               /* Comprimo */          
-               FILE *fp;
-               Uint32 i, j, total, k;
-               unsigned char *mtf;
-               unsigned char *salida, *data;
-               unsigned char *z;
-               int z_len;
-               
-               /* Preparo el compresor huffman */
-               if ((shuff = shuff_init_encoder_bychunk(argv[optind+1],volumesize*1024)) == NULL) return 1;
-               if (mflag == 1) shuff_loadmodel(shuff,staticmodel);
-               
-               /* Preparo el BS alocando mem para la Salida: V(vector) + K(colnum) */
-               data = malloc(sizeof(unsigned char)*pagesize);
-               salida = malloc(sizeof(unsigned char)*pagesize+sizeof(Uint32));
-               bs = bs_create(pagesize);
-
-               /* Abrimos el archivo a comprimir y encodeamos bloques */
-               fp = fopen(argv[optind], "rb");
-
-               /* Guardamos el pagesize como header (huffencoded) */
-               shuff_scanfreq_chunk(shuff,(char*)&pagesize,sizeof(size_t));
-
-               total = 0;
-               while (!feof(fp)) {
-                       i = 0;
-                       while ((!feof(fp)) && (i < pagesize)) {
-                               data[i++] = fgetc(fp);
-                               total++;
-                       }
+       if (flags.cflag == 1) {
+               return comprimir(argv[optind], argv[optind+1], pagesize, volumesize, &flags, staticmodel);
+       }
+       
+       if (flags.dflag == 1) { 
+               return descomprimir(argv[optind], argv[optind+1]);
+       }

 
 

-                       /* Saco un EOF que lee de mas */
-                       if (i<pagesize) i--;
+       return 0;
+}

 
 

-                       /* Aplico BS guardando su resultado + el K en salida */
-                       bs_solve(data, salida, bs, &k, i);
+long fsize(const char* filename)
+{
+       FILE* file;
+       long  file_size;

 
 

-                       /* Le aplico el MTF a salida */
-                       mtf = jacu_mtf(salida, i+sizeof(Uint32), &z, &z_len);
-                       
-                       /* Si me lo piden, aplico ZG. */
-                       if (zflag) {
-                               size_t len;
-                               char buff[2];
-                               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);                                                            
-
-                               /* Comprimo la salida del MTF */                                
-                               shuff_scanfreq_chunk(shuff,mtf,i+sizeof(Uint32));                               
-                       }
-                       free(mtf);
-                       free(z);
-               }
+       if (!(file = fopen(filename, "ab"))) return -1;
+       file_size = ftell(file);
+       fclose(file);
+       return file_size;
+}

 
 

-               /* Limpiando */
-               fclose(fp);             
-               bs_destroy(bs);
+int comprimir(char *src, char *dst, Uint32 pagesize, Uint32 volumesize, t_Flags *flags, char *staticmodel)
+{
+       /* Comprimo */          
+       t_BlockSort *bs;
+       HUFF_STATE *shuff;
+       FILE *fp;
+       Uint32 i, j, total, k;
+       unsigned char *mtf;
+       unsigned char *salida, *data;
+       unsigned char *z;
+       int z_len;
+       
+       /* Abrimos el archivo a comprimir y encodeamos bloques */
+       if ((fp = fopen(src, "rb")) == NULL) return 1;
+       
+       /* Preparo el compresor huffman */
+       if ((shuff = shuff_init_encoder_bychunk(dst, volumesize*1024)) == NULL) return 1;
+       if (flags->mflag == 1) shuff_loadmodel(shuff, staticmodel);
+       
+       /* Preparo el BS alocando mem para la Salida: V(vector) + K(colnum) */
+       data = malloc(sizeof(unsigned char)*pagesize);
+       salida = malloc(sizeof(unsigned char)*pagesize+sizeof(Uint32));
+       bs = bs_create(pagesize);

 
 

-               /* Comprimo con Huffman */              
-               shuff_encode_file(shuff);
-               if (sflag == 1) shuff_savemodel(shuff);
-               /* Shutdown Huffman */
-               shuff_deinit_encoder(shuff);
-               free(shuff);
+       /* Guardamos el pagesize como header (huffencoded) */
+       shuff_scanfreq_chunk(shuff,(char*)&pagesize,sizeof(Uint32));

 
 

-               /* Muestro bpb */
-               printf("Comprimido a %.04f bpb.\n", get_file_size(argv[optind+1])*8.0/get_file_size(argv[optind]));
-               return 0;
-       }
-       
-       if (dflag == 1) { 
-               /* Descomprimo */
-               FILE *fp_out;
-               /*FILE *fp_in;*/
-               Uint32 block_size = 0, k;
-               unsigned char *block, *mtf, *orig;
-               unsigned char *z;
-               int z_len,moredata = 0,decoded = 0;
-
-               /* Inicializo el descompresor */
-               if ((shuff = shuff_init_decoder(argv[optind],NULL)) == NULL) return 1;
-                               
-               /* Abrimos el archivo de salida */
-               fp_out = fopen(argv[optind+1], "wb");
-               
-               /* Descomprimo primero que nada el pagesize utilizado para comprimir */
-               if (!(moredata = shuff_decode_chunk(shuff,(char*)&block_size,sizeof(Uint32),&decoded))) return 1;
-               block = malloc(block_size*sizeof(unsigned char)+sizeof(Uint32));
-               orig = malloc(block_size*sizeof(unsigned char));
-
-               /* Descomprimimos de a chunks segun convenga */
-               do {                    
-                       if (block_size > 0) {
-                               /* Descomprimo el Zlen y el Z del MTF */
-                               moredata = shuff_decode_chunk(shuff,(char*)&z_len,sizeof(int),&decoded);                                
-                               z = malloc(sizeof(unsigned char)*z_len);
-                               moredata = shuff_decode_chunk(shuff,z,z_len,&decoded);
-                               
-                               /* Levanto una salida de MTF y le aplico MTF Inverso */
-                               moredata = shuff_decode_chunk(shuff,block,block_size+sizeof(Uint32),&decoded);                          
-                               mtf = jacu_mtf_inv(z, block, decoded);
+       /* Guardamos cabecera para indicar si usamos ZG (huffencoded) */
+       if (flags->zflag)
+               shuff_scanfreq_chunk(shuff, "\001", 1);
+       else
+               shuff_scanfreq_chunk(shuff, "\000", 1);

 
 

-                               /* Ya tengo la salida del BS, tonces levanto su K */
-                               memcpy(&k, mtf, sizeof(Uint32));
+       total = 0;
+       while (!feof(fp)) {
+               i = 0;
+               i = bs_readblock(fp, data, pagesize);
+               total += i;

 
 

-                               /* Obtengo el chunk original aplicando BS Inverso */
-                               bs_restore(orig, mtf+sizeof(Uint32), k, decoded - sizeof(Uint32));

 
 

-                               fwrite(orig, decoded - sizeof(Uint32), sizeof(unsigned char), fp_out);
-                               free(mtf);
-                               free(z);
-                       }
-                       else return 1;
-               } while (moredata);             
-               
-               /* Close up files and free mem */
-               fclose(fp_out);
-               free(block);
-               free(orig);
+               /* Aplico BS guardando su resultado + el K en salida */
+               bs_solve(data, salida, bs, &k, i);
+
+               /* 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);                    

                
                

-               /* Shutdown Huffman */
-               shuff_deinit_decoder(shuff);
-               free(shuff);
+               /* Si me lo piden, aplico ZG. */
+               if (flags->zflag) {
+                       Uint32 len;
+                       unsigned char buff[2];
+                       Uint32 total_size = i + sizeof(Uint32);
+                       ZG zg;
+                       /* Guardo la salida del MTF con ceros agrupados (ZG) */
+                       zg_init(&zg);
+                       for (j = 0; j < total_size; ++j)
+                               if ((len = zg_group(&zg, buff, mtf[j])))
+                                       shuff_scanfreq_chunk(shuff, buff, len);
+
+                               /* Flusheo ultimo zgrouping */
+                               if ((len = zg_group_finish(&zg,buff)))
+                                       shuff_scanfreq_chunk(shuff, buff, len);
+               } else {
+                       /* Comprimo la salida del MTF */
+                       shuff_scanfreq_chunk(shuff,mtf,i+sizeof(Uint32));
+               }
+               free(mtf);
+               free(z);

        }
 
        }
 

+       /* Limpiando */
+       if (fclose(fp)) fprintf(stderr, "Error al cerrar archivo de entrada!\n");
+       bs_destroy(bs);
+       free(data);
+       free(salida);
+
+       /* Comprimo con Huffman */              
+       shuff_encode_file(shuff);
+       if (flags->sflag == 1) shuff_savemodel(shuff);
+       /* Shutdown Huffman */
+       shuff_deinit_encoder(shuff);
+       free(shuff);
+
+       /* Muestro bpb */
+       printf("%s: %.04f bits/byte.\n", dst, vfsize(dst)*8.0f/fsize(src));

        return 0;
 }
 
        return 0;
 }
 

-long get_file_size(const char* filename)
+int descomprimir(char *src, char *dst)

 {
 {

-       FILE* file;
-       long  file_size;
+       /* Descomprimo */
+       FILE *fp_out;
+       Uint32 block_size = 0, k;
+       unsigned char *block, *mtf, *orig;
+       unsigned char *z;
+       int z_len=0,moredata = 0,decoded = 0;
+       unsigned char use_zg = 0,retbytes = 0;
+       HUFF_STATE *shuff;

 
 

-       if (!(file = fopen(filename, "ab"))) return -1;
-       file_size = ftell(file);
-       fclose(file);
-       return file_size;
+       /* Inicializo el descompresor */
+       if ((shuff = shuff_init_decoder(src, NULL)) == NULL) return 1;
+                       
+       /* Abrimos el archivo de salida */
+       fp_out = fopen(dst, "wb");
+       
+       /* 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));
+
+       /* Descomprimimos de a chunks segun convenga */
+       do {                    
+               if (block_size > 0) {
+                       /* Descomprimo el Zlen y el Z del MTF*/
+                       moredata = shuff_decode_chunk(shuff,(char*)&z_len,sizeof(int),&decoded);                                        
+                       z = malloc(sizeof(unsigned char)*z_len);
+                       moredata = shuff_decode_chunk(shuff,z,z_len,&decoded);                          
+                       
+                       /* Veo si se uso Zero Grouping para comprimir */
+                       if (use_zg) {
+                               ZG zg;
+                               unsigned char zgbuffer[255];
+                               unsigned char zgbyte = 0;
+                               int zgmoved = 0;
+                               Uint32 zgungrouped = 0;
+                               /* Desagrupo bytes hasta completar la pagina or End of Source File */
+                               zg_init(&zg);
+                               do {
+                                       /* Levanto un byte zerogrouped y lo paso por el zg_ungroup */
+                                       zgmoved = 0;
+                                       moredata = shuff_decode_chunk(shuff,&zgbyte,1,&decoded);
+                                       retbytes = zg_ungroup(&zg,zgbuffer,zgbyte);
+                                       /* Muevo del zgbuffer a mi bloque lo que corresponda */
+                                       while ((zgmoved < retbytes) && (zgungrouped < block_size+sizeof(Uint32))) {
+                                               block[zgungrouped++] = zgbuffer[zgmoved++];
+                                       }
+                               } while ((moredata) && (zgungrouped < block_size+sizeof(Uint32)));
+
+                               /* Me fijo si el ultimo byte procesado que me completo la pagina fue un 0 */
+                               if (zgbyte == 0) {
+                                       /* Leo un byte mas (un 0 seguro) y zg_ungroup cambiara su estado */
+                                       moredata = shuff_decode_chunk(shuff,&zgbyte,1,&decoded);
+                                       zg_ungroup(&zg,zgbuffer,zgbyte);
+                               }
+
+                               /* Normalizo variables para continuar en common code */
+                               decoded = zgungrouped;
+                       }
+                       else {
+                               /* Levanto una salida de MTF */
+                               moredata = shuff_decode_chunk(shuff,block,block_size+sizeof(Uint32),&decoded);
+                       }
+                       
+                       /* Le aplico MTF inverso a la salida de MTF levantada previamente */
+                       mtf = jacu_mtf_inv(z, block, decoded);
+
+                       /* Ya tengo la salida del BS, tonces levanto su K */
+                       memcpy(&k, mtf, sizeof(Uint32));
+
+                       /* Obtengo el chunk original aplicando BS Inverso */
+                       bs_restore(orig, mtf+sizeof(Uint32), k, decoded - sizeof(Uint32));
+
+                       fwrite(orig, decoded - sizeof(Uint32), sizeof(unsigned char), fp_out);
+                       free(mtf);
+                       free(z);
+               }
+               else return 1;
+       } while (moredata);
+       
+       /* Close up files and free mem */
+       fclose(fp_out);
+       free(block);
+       free(orig);
+
+       /* Shutdown Huffman */
+       shuff_deinit_decoder(shuff);
+       free(shuff);
+       return 0;

 }
 }