X-Git-Url: https://git.llucax.com/z.facultad/75.06/jacu.git/blobdiff_plain/0aa658449bef68a63ecc6ba2960f93810a8a8341..841370154c046cd57a75408f463e94c8296e8c7f:/src/jacu.c

diff --git a/src/jacu.c b/src/jacu.c
index 2982b0f..ce801b4 100644
--- a/src/jacu.c
+++ b/src/jacu.c
@@ -1,100 +1,315 @@
 
-#include "statichuff/statichuff.h"
+/* Jacu Team - GPL */
 #include "blocksorting/bs.h"
 #include "mtf/mtf.h"
+#include "zerogrouping/zerogrouping.h"
+#include "statichuff/statichuff.h"
 #include "vfile/vfile.h"
+#include "vfile/common.h"
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
 
+long get_file_size(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 volumensize, t_Flags *flags, char *staticmodel);
+int descomprimir(char *src, char *dst);
+
 int main(int argc, char* argv[])
 {	
-	int cflag = 0;
-	int dflag = 0;
-	int tflag = 0;
-	int pflag = 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, "cdt:p:")) != -1) { 
+	memset(&flags, 0, sizeof(t_Flags));
+
+	while ((ch = getopt(argc, argv, "scdzm: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 't': tflag = 1; 
-					  volumesize = atol(optarg);
+			case 'z': flags.zflag = 1; 
 					  break; 
-
-			case 'p': pflag = 1; 
-					  pagesize = atoi(optarg);
+			
+			case 'm': flags.mflag = 1;
+					  staticmodel = optarg;
 					  break; 
+			
+			case 's': flags.sflag = 1; 					  
+					  break;
+
+			case 't': flags.tflag = 1; 
+				volumesize = atol(optarg);
+				break; 
 
-			default: fprintf(stderr, "Usage: %s [-cdpt] sourcefile targetfile\n", argv[0]); 
+			case 'q': flags.qflag = 1; 
+				switch (atoi(optarg))
+				{
+					case 0: pagesize = 1024; /* 1K */
+						break;
+					case 1: pagesize = 2048; /* 2K */
+						break;
+					case 2: pagesize = 4096; /* 4K */
+						break;
+					case 3: pagesize = 8192; /* 8K */
+						break;
+					case 4: pagesize = 16384; /* 16K */
+						break;
+					case 5: pagesize = 32768; /* 32K */
+						break;
+					case 6: pagesize = 65536; /* 64K */
+						break;
+					case 7: pagesize = 131072; /* 128K */
+						break;
+					case 8: pagesize = 262144; /* 256K */
+						break;
+					case 9: pagesize = 524288; /* 512K */
+						break;
+					default: pagesize = 0; /* error */
+				}
+				break; 
+
+			default: fprintf(stderr, "Usage: %s [-cdzs][-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 [-cdzs][-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 ((pflag) && (pagesize <= 1u)) {
-		fprintf(stderr,"Error: El tamaño de página debe ser mayor a 1 byte.\n");
+	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;
-		unsigned long int i, j, total, k;
-		int *mtf;
-		char *salida, *data, c;
-		data = malloc(sizeof(char)*pagesize);
-		/* Reservo lugar tambien para guardar el k */
-		salida = malloc(sizeof(char)*(pagesize)+sizeof(unsigned long int));
-		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);
-			/* Le aplico el MTF */
-			mtf = jacu_mtf(salida, i+sizeof(unsigned long int));
-			for(j=0; j<i; j++)
-				fputc(mtf[j], fp_out);
-		}
-		fclose(fp);
-		fclose(fp_out);
-		bs_destroy(bs);
-		i = shuff_encode_file("tmp.comp",argv[optind+1], volumesize);
-		/* borro el temporal */
-		unlink("tmp.comp");
-		return i;
+	if (flags.cflag == 1) {
+		return comprimir(argv[optind], argv[optind+1], pagesize, volumesize, &flags, staticmodel);
 	}
 	
-	if (dflag == 1) { 
-		/* Descomprimo */
-		return shuff_decode_file(argv[optind],argv[optind+1]);
+	if (flags.dflag == 1) { 
+		return descomprimir(argv[optind], argv[optind+1]);
 	}
+
+	return 0;
+}
+
+long get_file_size(const char* filename)
+{
+	FILE* file;
+	long  file_size;
+
+	if (!(file = fopen(filename, "ab"))) return -1;
+	file_size = ftell(file);
+	fclose(file);
+	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;
+	int z_len;
+	
+	/* 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);
+
+	/* 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));
+
+	/* Guardamos cabecera para indicar si usamos ZG (huffencoded) */
+	if (flags->zflag)
+		shuff_scanfreq_chunk(shuff, "\001", 1);
+	else
+		shuff_scanfreq_chunk(shuff, "\000", 1);
+
+	total = 0;
+	while (!feof(fp)) {
+		i = 0;
+		while ((!feof(fp)) && (i < pagesize)) {
+			data[i++] = fgetc(fp);
+			total++;
+		}
+
+		/* Saco un EOF que lee de mas */
+		if (i<pagesize) 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 */
+	fclose(fp);		
+	bs_destroy(bs);
+
+	/* 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, get_file_size(dst)*8.0f/get_file_size(src));
+	return 0;
+}
+
+int descomprimir(char *src, char *dst)
+{
+	/* Descomprimo */
+	FILE *fp_out;
+	Uint32 block_size = 0,zgungrouped = 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;
+	HUFF_STATE *shuff;
+	ZG zg;
+
+	/* 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;
+	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));
+
+	/* 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) {																				
+				/* Desagrupo bytes hasta completar la pagina or End of Source File */
+				zgungrouped = 0;					
+				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);
+	free(zgbuffer);
+	
+	/* Shutdown Huffman */
+	shuff_deinit_decoder(shuff);
+	free(shuff);
 	return 0;
 }