X-Git-Url: https://git.llucax.com/z.facultad/75.06/jacu.git/blobdiff_plain/4ad9731a41bc40873fc68a278d2b708d23003638..d53cc94464bba53e0be1297ca0cc746901ec113b:/src/jacu.c diff --git a/src/jacu.c b/src/jacu.c index 18c4424..8f9beb0 100644 --- a/src/jacu.c +++ b/src/jacu.c @@ -20,10 +20,11 @@ typedef struct _flags_ { int qflag; int sflag; int mflag; + int rflag; /* Richard Dictionary :-) */ } t_Flags; int comprimir(char *src, char *dst, Uint32 pagesize, Uint32 volumesize, t_Flags *flags, char *staticmodel); -int descomprimir(char *src, char *dst); +int descomprimir(char *src, char *dst, t_Flags *flags); int main(int argc, char* argv[]) { @@ -35,7 +36,7 @@ int main(int argc, char* argv[]) memset(&flags, 0, sizeof(t_Flags)); - while ((ch = getopt(argc, argv, "scdzm:t:q:")) != -1) { + while ((ch = getopt(argc, argv, "rscdzm:t:q:")) != -1) { switch (ch) { case 'c': flags.cflag = 1; @@ -58,6 +59,8 @@ int main(int argc, char* argv[]) volumesize = atol(optarg); break; + case 'r': flags.rflag = 1; + break; case 'q': flags.qflag = 1; switch (atoi(optarg)) { @@ -85,13 +88,13 @@ int main(int argc, char* argv[]) } break; - default: fprintf(stderr, "Usage: %s [-cdzs][-q blksize][-t volsize][-m modeldumpfile] source target\n", argv[0]); + default: fprintf(stderr, "Usage: %s [-cdzsr][-q blksize][-t volsize][-m modeldumpfile] source target\n", argv[0]); return(2); } } 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]); + fprintf(stderr, "Usage: %s [-cdzsr][-q compressionquality][-t volsize][-m modeldumpfile] source target\n", argv[0]); return (3); } if ((flags.tflag) && (volumesize <= 0l)) { @@ -108,7 +111,7 @@ int main(int argc, char* argv[]) } if (flags.dflag == 1) { - return descomprimir(argv[optind], argv[optind+1]); + return descomprimir(argv[optind], argv[optind+1], &flags); } return 0; @@ -137,6 +140,9 @@ int comprimir(char *src, char *dst, Uint32 pagesize, Uint32 volumesize, t_Flags 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); @@ -146,9 +152,6 @@ int comprimir(char *src, char *dst, Uint32 pagesize, Uint32 volumesize, t_Flags salida = malloc(sizeof(unsigned char)*pagesize+sizeof(Uint32)); bs = bs_create(pagesize); - /* Abrimos el archivo a comprimir y encodeamos bloques */ - fp = fopen(src, "rb"); - /* Guardamos el pagesize como header (huffencoded) */ shuff_scanfreq_chunk(shuff,(char*)&pagesize,sizeof(Uint32)); @@ -161,7 +164,7 @@ int comprimir(char *src, char *dst, Uint32 pagesize, Uint32 volumesize, t_Flags total = 0; while (!feof(fp)) { i = 0; - i = bs_readblock(fp, data, pagesize); + i = bs_readblock(fp, data, pagesize, flags->rflag); total += i; @@ -180,8 +183,8 @@ int comprimir(char *src, char *dst, Uint32 pagesize, Uint32 volumesize, t_Flags Uint32 len; unsigned char buff[2]; Uint32 total_size = i + sizeof(Uint32); - ZG zg; - /* Guardo la salida del MTF con ceros agrupados (ZG) */ + 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]))) @@ -189,10 +192,10 @@ int comprimir(char *src, char *dst, Uint32 pagesize, Uint32 volumesize, t_Flags /* Flusheo ultimo zgrouping */ if ((len = zg_group_finish(&zg,buff))) - shuff_scanfreq_chunk(shuff, buff, len); + shuff_scanfreq_chunk(shuff, buff, len); } else { - /* Comprimo la salida del MTF */ - shuff_scanfreq_chunk(shuff,mtf,i+sizeof(Uint32)); + /* Comprimo la salida del MTF */ + shuff_scanfreq_chunk(shuff,mtf,i+sizeof(Uint32)); } free(mtf); free(z); @@ -216,17 +219,16 @@ int comprimir(char *src, char *dst, Uint32 pagesize, Uint32 volumesize, t_Flags return 0; } -int descomprimir(char *src, char *dst) +int descomprimir(char *src, char *dst, t_Flags *flags) { /* Descomprimo */ FILE *fp_out; - Uint32 block_size = 0,zgungrouped = 0, k; + Uint32 block_size = 0, k; unsigned char *block, *mtf, *orig; - unsigned char *z, *zgbuffer; - int zgmoved = 0,z_len=0,moredata = 0,decoded = 0; - unsigned char use_zg = 0,zgbyte = 0,retbytes = 0; + unsigned char *z; + Uint32 z_len=0,moredata = 0,decoded = 0; + unsigned char use_zg = 0,retbytes = 0; HUFF_STATE *shuff; - ZG zg; /* Inicializo el descompresor */ if ((shuff = shuff_init_decoder(src, NULL)) == NULL) return 1; @@ -239,10 +241,8 @@ int descomprimir(char *src, char *dst) /* Descomprimo byte que indica si se usa ZG */ if (!(moredata = shuff_decode_chunk(shuff, &use_zg, 1, &decoded))) return 1; - if (use_zg) zg_init(&zg); /* Creo buffers */ - zgbuffer = malloc(sizeof(unsigned char)*256); block = malloc(block_size*sizeof(unsigned char)+sizeof(Uint32)); orig = malloc(block_size*sizeof(unsigned char)); @@ -255,17 +255,22 @@ int descomprimir(char *src, char *dst) moredata = shuff_decode_chunk(shuff,z,z_len,&decoded); /* Veo si se uso Zero Grouping para comprimir */ - if (use_zg) { + 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 */ - zgungrouped = 0; - do { + 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); + 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++]; + /* 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))); @@ -274,17 +279,17 @@ int descomprimir(char *src, char *dst) /* 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; + 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 */ + /* 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 */ @@ -293,22 +298,24 @@ int descomprimir(char *src, char *dst) /* 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); + /* XXX AHORA METO EL FLAG EN EL ARCHIVO; DON'T WORRRRRYYYYYYY XXX */ + if (flags->rflag == 1) + orig = bs_finalblock(orig, decoded-sizeof(Uint32), &decoded); + + fwrite(orig, decoded, sizeof(unsigned char), fp_out); free(mtf); - free(z); + free(z); } else return 1; - } while (moredata); + } while (moredata); /* Close up files and free mem */ fclose(fp_out); free(block); free(orig); - free(zgbuffer); - + /* Shutdown Huffman */ shuff_deinit_decoder(shuff); free(shuff); return 0; } -