X-Git-Url: https://git.llucax.com/z.facultad/75.06/emufs.git/blobdiff_plain/80aa04fe7756cf1670b51e01238b166d95eb43e4..681f9d807b6f486e251e49401abe40c09b7855c1:/emufs/idx.c?ds=inline

diff --git a/emufs/idx.c b/emufs/idx.c
index cb2ff78..35ebcf4 100644
--- a/emufs/idx.c
+++ b/emufs/idx.c
@@ -131,7 +131,6 @@ EMUFS_BLOCK_ID emufs_idx_buscar_registro(EMUFS *emu, EMUFS_REG_ID reg_id)
 	return EMUFS_NOT_FOUND;
 }
 
-/* agrega un registro al final del archivo */
 int emufs_idx_agregar(EMUFS *emu, EMUFS_REG_ID id_reg, EMUFS_BLOCK_ID location)
 {
 	FILE *f_idx;
@@ -141,7 +140,7 @@ int emufs_idx_agregar(EMUFS *emu, EMUFS_REG_ID id_reg, EMUFS_BLOCK_ID location)
 	strcpy(name_f_idx,emu->nombre);
 	strcat(name_f_idx, EMUFS_IDX_EXT);
 
-	if ( (f_idx = fopen(name_f_idx,"a+b"))==NULL ) return -1;
+	if ( (f_idx = fopen(name_f_idx,"r+"))==NULL ) return -1;
 
 	fseek(f_idx, sizeof(EMUFS_IDX)*id_reg, SEEK_SET); 
 	reg.id_reg = id_reg;
@@ -239,7 +238,7 @@ int emufs_idx_existe_id(EMUFS *emu, int ID)
 		PERR("No se pudo abrir el archivo");
 		return -1;
 	}
-
+	
 	if (fseek(f_idx, sizeof(EMUFS_IDX)*ID, SEEK_SET) == 0) {
 		fread(&reg, sizeof(EMUFS_IDX), 1, f_idx);
 		if (reg.location != EMUFS_NOT_FOUND) {
@@ -247,7 +246,29 @@ int emufs_idx_existe_id(EMUFS *emu, int ID)
 			return 0;
 		}
 	}
+	fclose(f_idx);
+	return -1;/*no existe el id*/
+}
+
+int emufs_idx_actualizar(EMUFS *emu, int ID, EMUFS_BLOCK_ID bloque)
+{
+	FILE *f_idx;
+	char name_f_idx[255];
+	EMUFS_IDX reg;
+	
+	strcpy(name_f_idx,emu->nombre);
+	strcat(name_f_idx, EMUFS_IDX_EXT);
 
+	if ( (f_idx = fopen(name_f_idx, "r+")) == NULL){
+		PERR("No se pudo abrir el archivo");
+		return -1;
+	}
+	fseek(f_idx,0,SEEK_SET);
+	fseek(f_idx,ID*sizeof(EMUFS_IDX),SEEK_SET);
+	fread(&reg,sizeof(EMUFS_IDX),1,f_idx);
+	reg.location = bloque;
+	fseek(f_idx,-sizeof(EMUFS_IDX),SEEK_CUR);
+	fwrite(&reg,sizeof(EMUFS_IDX),1,f_idx);
 	fclose(f_idx);
-	return -1;
+	return 0;
 }