From 581c6c4f1d70b1928ae2946aa0482a4d36ea56d9 Mon Sep 17 00:00:00 2001
From: Ricardo Markiewicz <gazer.arg@gmail.com>
Date: Mon, 28 Jun 2004 04:43:21 +0000
Subject: [PATCH]  Agrego manejo de flags en el header, en total se puden usar
 hasta 8 flahs. 2 usadas  actualmente y 6 RESERVED

---
 src/blocksorting/bs.c | 13 ++++-------
 src/jacu.c            | 53 +++++++++++++++++++++++++++++++++----------
 2 files changed, 46 insertions(+), 20 deletions(-)

diff --git a/src/blocksorting/bs.c b/src/blocksorting/bs.c
index 1b7c0e3..a71e261 100644
--- a/src/blocksorting/bs.c
+++ b/src/blocksorting/bs.c
@@ -313,6 +313,11 @@ int bs_readblock(FILE *fp, char *data, Uint32 pagesize, int usar_dic)
 	while ((!feof(fp)) && ((i+buffer_pos) < pagesize)) {
 		c = fgetc(fp);
 		
+		if (usar_dic != 1) {
+			data[i++] = c;
+			continue;
+		}
+
 		if (c == ESCAPE_CHARACTER) {
 			data[i++] = c;
 			data[i++] = 0xF;
@@ -322,11 +327,6 @@ int bs_readblock(FILE *fp, char *data, Uint32 pagesize, int usar_dic)
 
 		hint = check_hint(c);
 
-		if (usar_dic != 1) {
-			data[i++] = c;
-			continue;
-		}
-
 		switch (hint) {
 			case -1:
 				/* No hay hints, vacio el buffer y luego saco el c */
@@ -382,14 +382,11 @@ char *bs_finalblock(char *data, Uint32 len, Uint32 *new_size)
 			} else {
 				/* Va una palabra!! */
 				tmp = data[i];
-				printf("%d\n", data[i]);
 				size += dic[(size_t)tmp].len;
 				out = (char *)realloc(out, size*sizeof(char));
 				for(j=0; j<dic[(size_t)tmp].len; j++) {
-					printf("%c", dic[(size_t)tmp].word[j]);
 					out[size-dic[(size_t)tmp].len+j] = dic[(size_t)tmp].word[j];
 				}
-				printf("\n");
 				/* Salteo el caracter siguiente al de escape */
 			}
 		} else {
diff --git a/src/jacu.c b/src/jacu.c
index 8f9beb0..042a332 100644
--- a/src/jacu.c
+++ b/src/jacu.c
@@ -12,6 +12,16 @@
 
 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;
@@ -24,7 +34,22 @@ typedef struct _flags_ {
 } t_Flags;
 
 int comprimir(char *src, char *dst, Uint32 pagesize, Uint32 volumesize, t_Flags *flags, char *staticmodel);
-int descomprimir(char *src, char *dst, t_Flags *flags);
+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[])
 {	
@@ -111,7 +136,7 @@ int main(int argc, char* argv[])
 	}
 	
 	if (flags.dflag == 1) { 
-		return descomprimir(argv[optind], argv[optind+1], &flags);
+		return descomprimir(argv[optind], argv[optind+1]);
 	}
 
 	return 0;
@@ -138,6 +163,7 @@ int comprimir(char *src, char *dst, Uint32 pagesize, Uint32 volumesize, t_Flags
 	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 */
@@ -157,9 +183,11 @@ int comprimir(char *src, char *dst, Uint32 pagesize, Uint32 volumesize, t_Flags
 
 	/* Guardamos cabecera para indicar si usamos ZG (huffencoded) */
 	if (flags->zflag)
-		shuff_scanfreq_chunk(shuff, "\001", 1);
-	else
-		shuff_scanfreq_chunk(shuff, "\000", 1);
+		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)) {
@@ -219,7 +247,7 @@ int comprimir(char *src, char *dst, Uint32 pagesize, Uint32 volumesize, t_Flags
 	return 0;
 }
 
-int descomprimir(char *src, char *dst, t_Flags *flags)
+int descomprimir(char *src, char *dst)
 {
 	/* Descomprimo */
 	FILE *fp_out;
@@ -227,7 +255,7 @@ int descomprimir(char *src, char *dst, t_Flags *flags)
 	unsigned char *block, *mtf, *orig;
 	unsigned char *z;
 	Uint32 z_len=0,moredata = 0,decoded = 0;
-	unsigned char use_zg = 0,retbytes = 0;
+	unsigned char file_flags = 0,retbytes = 0;
 	HUFF_STATE *shuff;
 
 	/* Inicializo el descompresor */
@@ -240,7 +268,7 @@ int descomprimir(char *src, char *dst, t_Flags *flags)
 	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 (!(moredata = shuff_decode_chunk(shuff, &file_flags, 1, &decoded))) return 1;
 
 	/* Creo buffers */
 	block = malloc(block_size*sizeof(unsigned char)+sizeof(Uint32));
@@ -255,7 +283,7 @@ int descomprimir(char *src, char *dst, t_Flags *flags)
 			moredata = shuff_decode_chunk(shuff,z,z_len,&decoded);				
 			
 			/* Veo si se uso Zero Grouping para comprimir */
-			if (use_zg) {
+			if (is_flags_on(file_flags, FLAGS_ZG)) {
 				ZG zg;
 				unsigned char zgbuffer[255];
 				unsigned char zgbyte = 0;
@@ -298,9 +326,10 @@ int descomprimir(char *src, char *dst, t_Flags *flags)
 			/* Obtengo el chunk original aplicando BS Inverso */
 			bs_restore(orig, mtf+sizeof(Uint32), k, decoded - sizeof(Uint32));
 
-			/* XXX AHORA METO EL FLAG EN EL ARCHIVO; DON'T WORRRRRYYYYYYY XXX */
-			if (flags->rflag == 1)
-				orig = bs_finalblock(orig, decoded-sizeof(Uint32), &decoded);
+			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);
-- 
2.43.0