X-Git-Url: https://git.llucax.com/z.facultad/75.06/jacu.git/blobdiff_plain/0768f357f8e01a0baedfbb0ae1adf0e6fd4d4261..HEAD:/src/jacu.c

diff --git a/src/jacu.c b/src/jacu.c
index d31c648..d8f6de3 100644
--- a/src/jacu.c
+++ b/src/jacu.c
@@ -1,3 +1,23 @@
+/*----------------------------------------------------------------------------
+ *                   jacu - Just Another Compression Utility
+ *----------------------------------------------------------------------------
+ * This file is part of jacu.
+ *
+ * jacu is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any later
+ * version.
+ *
+ * jacu is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with jacu; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place, Suite 330, Boston, MA  02111-1307  USA
+ *----------------------------------------------------------------------------
+ */
 
 #include "blocksorting/bs.h"
 #include "mtf/mtf.h"
@@ -9,37 +29,83 @@
 #include <stdio.h>
 #include <unistd.h>
 
-long get_file_size(const char* filename);
+long fsize(const char* filename);
+
+/* Flags del archivo comprimido */
+#define FLAGS_ZG 0x1
+#define FLAGS_WS 0x2
+#define FLAGS_RESERVED_1 0x4
+#define FLAGS_RESERVED_2 0x8
+#define FLAGS_RESERVED_3 0x16
+#define FLAGS_RESERVED_4 0x64
+#define FLAGS_RESERVED_5 0x128
+#define FLAGS_RESERVED_6 0x255
+
+typedef struct _flags_ {
+	int cflag;
+	int dflag;
+	int zflag;
+	int tflag;
+	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);
+
+char is_flags_on(unsigned char flags, unsigned char flag)
+{
+	return (flags & flag);
+}
+
+char flag_on(unsigned char flags, unsigned char flag)
+{
+	return (flags | flag);
+}
+
+char flag_off(unsigned char flags, unsigned char flag)
+{
+	return (flags & (~flag));
+}
 
 int main(int argc, char* argv[])
 {	
-	int cflag = 0;
-	int dflag = 0;
-	int zflag = 0;
-	int tflag = 0;
-	int qflag = 0;
 	long int volumesize = 0;
-	size_t pagesize = 32768; /* 32KB */
+	Uint32 pagesize = 32768; /* 32KB */
 	int ch;
-	t_BlockSort *bs;
+	t_Flags flags;
+	char *staticmodel = NULL;
 			
-	while ((ch = getopt(argc, argv, "cdzt:q:")) != -1) { 
+	memset(&flags, 0, sizeof(t_Flags));
+
+	while ((ch = getopt(argc, argv, "rscdzm:t:q:")) != -1) { 
 		 
 		switch (ch) { 
-			case 'c': cflag = 1; 
+			case 'c': flags.cflag = 1; 
 					  break;
 
-			case 'd': dflag = 1; 
+			case 'd': flags.dflag = 1; 
 					  break; 
 
-			case 'z': zflag = 1; 
+			case 'z': flags.zflag = 1; 
 					  break; 
+			
+			case 'm': flags.mflag = 1;
+					  staticmodel = optarg;
+					  break; 
+			
+			case 's': flags.sflag = 1; 					  
+					  break;
 
-			case 't': tflag = 1; 
+			case 't': flags.tflag = 1; 
 				volumesize = atol(optarg);
 				break; 
 
-			case 'q': qflag = 1; 
+			case 'r': flags.rflag = 1;
+				break;
+			case 'q': flags.qflag = 1; 
 				switch (atoi(optarg))
 				{
 					case 0: pagesize = 1024; /* 1K */
@@ -66,170 +132,36 @@ int main(int argc, char* argv[])
 				}
 				break; 
 
-			default: fprintf(stderr, "Usage: %s [-cdpt] sourcefile targetfile\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) || (cflag & dflag) || !(cflag | dflag) || ((argc - optind) < 2) ) {
-		fprintf(stderr, "Usage: %s [-cdt] sourcefile targetfile\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 [-cdzsr][-q compressionquality][-t volsize][-m modeldumpfile] source target\n", argv[0]); 
 		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);
 	}
-	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);
 	}
 		
-	if (cflag == 1) {
-		/* Comprimo */
-		/* No me gusta el tmpfile ... es para probar como anda todo junto */
-		FILE *fp, *fp_out;
-		Uint32 i, j, total, k;
-		char *mtf;
-		char *salida, *data, c;
-		char *z;
-		int z_len;
-
-		data = malloc(sizeof(char)*pagesize);
-		/* Reservo lugar tambien para guardar el k y el tamaño  */
-		salida = malloc(sizeof(char)*(pagesize)+sizeof(Uint32)*2);
-		bs = bs_create(pagesize);
-
-		fp = fopen(argv[optind], "rb");
-		fp_out = fopen("tmp.comp", "wb");
-
-		c = fgetc(fp);
-		total = 0;
-		while (!feof(fp)) {
-			i = 0;
-			while ((!feof(fp)) && (i < pagesize)) {
-				data[i++] = c;
-				c = fgetc(fp);
-				total++;
-			}
-
-			/* Hago el BS */
-			bs_solve(data, salida, bs, &k, i);
-
-			printf("BS k=%ld\n", k);
-			printf("PageSize = %ld\n", i);
-
-			/* Le aplico el MTF, salteo el tamaño del bloque para que no se pierda. */
-			mtf = jacu_mtf(salida+sizeof(Uint32), i+sizeof(Uint32), &z, &z_len);
-
-			printf("MTF Z (len=%d) = [", z_len);
-			{
-				int ii;
-				for(ii=0; ii<z_len; ii++)
-					printf("%c", z[ii]);
-				printf("]\n");
-
-			}
-			/* 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]))) fwrite(buff, 1, len, fp_out);
-			} else {
-				/* Guardo el PageSize */
-				//for(j=0; j<sizeof(Uint32); j++)
-				//	fputc(mtf[j], fp_out);
-				fwrite(&i, sizeof(Uint32), 1, fp_out);
-
-				/* Guardo el Z len y el Z */
-				fwrite(&z_len, sizeof(int), 1, fp_out);
-				fwrite(z, z_len, sizeof(char), fp_out);
-
-				/* Guardo la salida del MTF */
-				for(j=sizeof(Uint32); j<i; j++)
-					fputc(mtf[j], fp_out);
-			}
-			free(mtf);
-			free(z);
-		}
-
-		/* 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 */
-		remove("tmp.comp");
-
-		/* Muestro bpb */
-		printf("Comprimido a %.04f bpb.\n", get_file_size(argv[optind+1])*8.0/get_file_size(argv[optind]));
-		return i;
+	if (flags.cflag == 1) {
+		return comprimir(argv[optind], argv[optind+1], pagesize, volumesize, &flags, staticmodel);
 	}
 	
-	if (dflag == 1) { 
-		/* Descomprimo */
-		FILE *fp_out;
-		FILE *fp_in;
-		Uint32 block_size, k;
-		char *block, *mtf, *orig;
-		char *z;
-		int z_len;
-
-		shuff_decode_file(argv[optind], "tmp.comp"); /*argv[optind+1]);*/
-		fp_in = fopen("tmp.comp", "rb");
-		fp_out = fopen(argv[optind+1], "wb");
-
-		while (!feof(fp_in)) {
-			block_size = 0;
-			PERR("Leo bloque");
-			fread(&block_size, sizeof(Uint32), 1, fp_in);
-			printf("PageSize = %ld\n", block_size);
-			fread(&z_len, sizeof(int), 1, fp_in);
-			z = malloc(sizeof(char)*z_len);
-			fread(z, z_len, sizeof(char), fp_in);
-
-			printf("MTF Z (len=%d) = [", z_len);
-			{
-				int ii;
-				for(ii=0; ii<z_len; ii++)
-					printf("%c", z[ii]);
-				printf("]\n");
-
-			}
-			if (block_size > 0) {
-				block = malloc(block_size*sizeof(char)+sizeof(Uint32));
-				orig = malloc(block_size*sizeof(char));
-				fread(block, block_size, sizeof(char), fp_in);
-
-				/* Hago el MTF inverso */
-				mtf = jacu_mtf_inv(z, block, block_size);
-
-				/* Luego de hacer el MTF inverso ya puedo recuperar el k */
-				memcpy(&k, block, sizeof(Uint32));
-
-				printf("Restored : k=%ld\n", k);
-				bs_restore(orig, block+sizeof(Uint32), k, block_size);
-
-				fwrite(orig, block_size, sizeof(char), fp_out);
-				free(block);
-				free(orig);
-				free(mtf);
-			}
-		}
-		fclose(fp_in);
-		fclose(fp_out);
+	if (flags.dflag == 1) { 
+		return descomprimir(argv[optind], argv[optind+1]);
 	}
 
 	return 0;
 }
 
-long get_file_size(const char* filename)
+long fsize(const char* filename)
 {
 	FILE* file;
 	long  file_size;
@@ -240,3 +172,198 @@ long get_file_size(const char* filename)
 	return file_size;
 }
 
+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;
+	unsigned char file_flags = 0;
+	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);
+
+	/* Guardamos el pagesize como header (huffencoded) */
+	shuff_scanfreq_chunk(shuff,(char*)&pagesize,sizeof(Uint32));
+
+	/* Guardamos cabecera para indicar si usamos ZG (huffencoded) */
+	if (flags->zflag)
+		file_flags = flag_on(file_flags, FLAGS_ZG);
+	if (flags->rflag)
+		file_flags = flag_on(file_flags, FLAGS_WS);
+
+	shuff_scanfreq_chunk(shuff, &file_flags, 1);
+
+	total = 0;
+	while (!feof(fp)) {
+		i = 0;
+		i = bs_readblock(fp, data, pagesize, flags->rflag);
+		total += i;
+
+
+		/* 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);			
+		
+		/* 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;
+}
+
+int descomprimir(char *src, char *dst)
+{
+	/* Descomprimo */
+	FILE *fp_out;
+	Uint32 block_size = 0, k;
+	unsigned char *block, *mtf, *orig;
+	unsigned char *z;
+	Uint32 z_len=0,moredata = 0,decoded = 0;
+	unsigned char file_flags = 0,retbytes = 0;
+	HUFF_STATE *shuff;
+
+	/* 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, &file_flags, 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 (is_flags_on(file_flags, FLAGS_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));
+
+			decoded -= sizeof(Uint32);
+			if (is_flags_on(file_flags, FLAGS_WS)) {
+				orig = bs_finalblock(orig, decoded, &decoded);
+			}
+
+			fwrite(orig, decoded, 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;
+}