X-Git-Url: https://git.llucax.com/z.facultad/75.06/emufs.git/blobdiff_plain/dab746f5bcfd9154d9a8656071d6a2436fd8a765..1251aa5beb1ae288e30468141c763d56e04a6bab:/emufs/idx.c?ds=sidebyside

diff --git a/emufs/idx.c b/emufs/idx.c
index 5fcec35..6db15a3 100644
--- a/emufs/idx.c
+++ b/emufs/idx.c
@@ -92,8 +92,8 @@ EMUFS_REG_ID emufs_idx_buscar_mayor_id_libre(EMUFS* emu, int* err)
 			*err = 3; /* EMUFS_ERROR_FILE_READ */
 			return EMUFS_NOT_FOUND;
 		}
-		if (reg.n_idreg >= max) {
-			max = reg.n_idreg;
+		if (reg.id_reg >= max) {
+			max = reg.id_reg;
 			found = 1;
 		}
 	}
@@ -129,9 +129,9 @@ EMUFS_BLOCK_ID emufs_idx_buscar_registro(EMUFS *emu, EMUFS_REG_ID reg_id)
 			/*   *err = 3; * EMUFS_ERROR_FILE_READ */
 			return EMUFS_NOT_FOUND;
 		}
-		if (reg.n_idreg == reg_id) {
+		if (reg.id_reg == reg_id) {
 			fclose(f_idx);
-			return reg.n_location;
+			return reg.location;
 		}
 	}
 	fclose(f_idx);
@@ -140,7 +140,7 @@ EMUFS_BLOCK_ID emufs_idx_buscar_registro(EMUFS *emu, EMUFS_REG_ID reg_id)
 }
 
 /* agrega un registro al final del archivo */
-int emufs_idx_agregar(EMUFS *emu, EMUFS_REG_ID n_idreg, EMUFS_BLOCK_ID n_location)
+int emufs_idx_agregar(EMUFS *emu, EMUFS_REG_ID id_reg, EMUFS_BLOCK_ID location)
 {
 	FILE *f_idx;
 	EMUFS_IDX reg;
@@ -152,8 +152,8 @@ int emufs_idx_agregar(EMUFS *emu, EMUFS_REG_ID n_idreg, EMUFS_BLOCK_ID n_locatio
 	if ( (f_idx = fopen(name_f_idx,"a+"))==NULL ) return -1;
 		
     /* Note: Location = Bloque para Tipo 1 y 3, Offset para Tipo 2 */
-    reg.n_idreg = n_idreg;
-	reg.n_location = n_location;
+	reg.id_reg = id_reg;
+	reg.location = location;
 	fwrite(&reg,sizeof(EMUFS_IDX),1,f_idx); 
 	fclose(f_idx);
 	return 0;
@@ -165,25 +165,24 @@ int emufs_idx_borrar(EMUFS *emu, EMUFS_REG_ID idreg)
 	FILE *f_idx;
 	EMUFS_IDX reg;
 	char name_f_idx[255];
-	long actual, final, cant, i, tam, a;
+	long actual, final, cant, i, tam;
 	
 	strcpy(name_f_idx,emu->nombre);
 	strcat(name_f_idx, EMUFS_IDX_EXT);
 
-	if ( (f_idx = fopen(name_f_idx,"a+"))==NULL ) return -1;
-		
-	
+	if ( (f_idx = fopen(name_f_idx,"r+"))==NULL ) return -1;
+
 	while ( !feof(f_idx) ){
 		/*busco cual tengo que borrar*/
 		if ( fread(&reg, sizeof(EMUFS_IDX), 1, f_idx) != 1 ) continue;
-		if ( reg.n_idreg == idreg )
+		if ( reg.id_reg == idreg ) {
 			break;
+		}
 	}
 
 	/* me paro en el que tengo que borrar */
 	fseek(f_idx, -sizeof(EMUFS_IDX), SEEK_CUR);	
 	actual = ftell(f_idx); /* Guardo la posicion actual */
-	printf(" actual  = %ld\n",actual);
 	fseek(f_idx, 0, SEEK_END); /* me voy al final */
 	final = ftell(f_idx); /* veo cuando ocupa el archivo */
 	fseek(f_idx, actual, SEEK_SET);/* vuelvo al lugar desde donde quiero justificar */
@@ -202,9 +201,7 @@ int emufs_idx_borrar(EMUFS *emu, EMUFS_REG_ID idreg)
 	/* Aca deberia estar al final del archivo , no hago seek */	
 	tam = ftell(f_idx);
 	fclose(f_idx);
-	if ( truncate(name_f_idx, tam-sizeof(EMUFS_IDX))!= 0) 
-		printf("no pude truncar\n");
-	else printf("TRUNKE!!!!\n");
+	truncate(name_f_idx, tam-sizeof(EMUFS_IDX));
 	
 	return 0;
 }
@@ -213,14 +210,53 @@ EMUFS_REG_ID emufs_idx_get_new_id(EMUFS* efs, int* err)
 {
 	EMUFS_REG_ID id;
 
+	(*err) = 0;
 	id = emufs_did_get_last(efs, err);
 	if (id == EMUFS_NOT_FOUND) {
 		id = emufs_idx_buscar_mayor_id_libre(efs, err);
 		if (*err) {
 			PERR("error al obtener id mayor");
-			return id;
+			return EMUFS_NOT_FOUND;
 		}
 	}
 	return id;	
 }
 
+unsigned int emufs_idx_get_count(EMUFS *emu)
+{
+	FILE *fp;
+	char name_f_idx[255];
+	long tam;
+	
+	strcpy(name_f_idx,emu->nombre);
+	strcat(name_f_idx, EMUFS_IDX_EXT);
+
+	fp = fopen(name_f_idx, "r");
+	if (fp == NULL) return 0;
+
+	fseek(fp, 0, SEEK_END);
+	tam = ftell(fp);
+	fclose(fp);
+
+	return tam/sizeof(EMUFS_IDX);
+}
+
+unsigned long emufs_idx_get_id_at(EMUFS *emu, unsigned int pos)
+{
+	FILE *fp;
+	char name_f_idx[255];
+	EMUFS_IDX id;
+	
+	strcpy(name_f_idx,emu->nombre);
+	strcat(name_f_idx, EMUFS_IDX_EXT);
+
+	fp = fopen(name_f_idx, "r");
+	if (fp == NULL) return EMUFS_NOT_FOUND;
+
+	fseek(fp, pos*sizeof(EMUFS_IDX), SEEK_SET);
+	fread(&id, sizeof(EMUFS_IDX), 1, fp);
+	fclose(fp);
+
+	return id.id_reg;
+}
+