X-Git-Url: https://git.llucax.com/z.facultad/75.06/emufs.git/blobdiff_plain/720b9cc2195c640096b5461399fe142fa987c5e4..67c6b07f6bd9d779f3314b5ce3de40ea4aa9dd51:/emufs/idx.c

diff --git a/emufs/idx.c b/emufs/idx.c
index 1ae3190..f465d20 100644
--- a/emufs/idx.c
+++ b/emufs/idx.c
@@ -78,7 +78,6 @@ EMUFS_REG_ID emufs_idx_buscar_mayor_id_libre(EMUFS* emu, int* err)
 	strcpy(name_f_idx, emu->nombre);
 	strcat(name_f_idx, EMUFS_IDX_EXT);
 
-	(*err) = 0;
 	if ((f_idx = fopen(name_f_idx, "rb")) == NULL) {
 		PERR("No se puede abrir archivo");
 		*err = 4; /* EMUFS_ERROR_CANT_OPEN_FILE */
@@ -92,8 +91,8 @@ 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 +128,9 @@ 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 +139,7 @@ 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 +151,8 @@ 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;
@@ -175,7 +174,7 @@ int emufs_idx_borrar(EMUFS *emu, EMUFS_REG_ID idreg)
 	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;
 		}
 	}
@@ -210,9 +209,12 @@ 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) {
+		if (*err) {
+			PERR("error al obtener ultimo id");
+			return id;
+		}
 		id = emufs_idx_buscar_mayor_id_libre(efs, err);
 		if (*err) {
 			PERR("error al obtener id mayor");
@@ -221,3 +223,41 @@ EMUFS_REG_ID emufs_idx_get_new_id(EMUFS* efs, int* err)
 	}
 	return id;	
 }
+
+EMUFS_REG_ID emufs_idx_get_count(EMUFS *emu)
+{
+	FILE *fp;
+	char name_f_idx[255];
+	EMUFS_REG_ID tam;
+	
+	strcpy(name_f_idx,emu->nombre);
+	strcat(name_f_idx, EMUFS_IDX_EXT);
+
+	fp = fopen(name_f_idx, "rb");
+	if (fp == NULL) return 0;
+
+	fseek(fp, 0l, SEEK_END);
+	tam = ftell(fp);
+	fclose(fp);
+
+	return tam/sizeof(EMUFS_IDX);
+}
+
+EMUFS_REG_ID emufs_idx_get_id_at(EMUFS *emu, long 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, "rb");
+	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;
+}