X-Git-Url: https://git.llucax.com/z.facultad/75.06/emufs.git/blobdiff_plain/80aa04fe7756cf1670b51e01238b166d95eb43e4..dea2e663e8a5afc489e331721832c3dbfb4d2f09:/emufs/idx.c

diff --git a/emufs/idx.c b/emufs/idx.c
index cb2ff78..ec86966 100644
--- a/emufs/idx.c
+++ b/emufs/idx.c
@@ -37,6 +37,8 @@
 
 #include "idx.h"
 #include "did.h"
+#include "error.h"
+#include "common.h"
 #include <stdlib.h>
 #include <strings.h>
 #include <unistd.h>
@@ -50,7 +52,6 @@ FILE* emufs_idx_abrir(EMUFS* efs, const char* mode)
 	filename = (char*) malloc(sizeof(char) * (strlen(efs->nombre)
 				+ strlen(EMUFS_IDX_EXT) + 1));
 	if (filename == NULL) {
-		/* TODO Manejo de errores */
 		return NULL;
 	}
 	strcpy(filename, efs->nombre);
@@ -80,7 +81,7 @@ EMUFS_REG_ID emufs_idx_buscar_mayor_id_libre(EMUFS* emu, int* err)
 
 	if ((f_idx = fopen(name_f_idx, "rb")) == NULL) {
 		PERR("No se puede abrir archivo");
-		*err = 4; /* EMUFS_ERROR_CANT_OPEN_FILE */
+		*err = EMUFS_ERROR_CANT_OPEN_FILE;
 		return EMUFS_NOT_FOUND;
 	}
 
@@ -115,7 +116,7 @@ EMUFS_BLOCK_ID emufs_idx_buscar_registro(EMUFS *emu, EMUFS_REG_ID reg_id)
 	
 	if ((f_idx = fopen(name_f_idx, "rb")) == NULL) {
 		PERR("No se puede abrir archivo");
-		/*    *err = 4; * EMUFS_ERROR_CANT_OPEN_FILE */
+		/* *err = EMUFS_ERROR_CANT_OPEN_FILE; */
 		return EMUFS_NOT_FOUND;
 	}
 
@@ -131,7 +132,6 @@ 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 +141,7 @@ 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;
@@ -215,10 +215,11 @@ EMUFS_REG_ID *emufs_idx_get(EMUFS *emu, EMUFS_REG_ID *cant)
 	count = 0;
 	while (!feof(f_idx)) {
 		if (fread(&reg, sizeof(EMUFS_IDX), 1, f_idx) != 1) continue;
-		count++;
-		/* TODO : Verificar errores :-D */
-		tmp = realloc(tmp, count);
-		tmp[count-1] = reg.id_reg;
+		if (reg.location != EMUFS_NOT_FOUND) {
+			count++;
+			tmp = realloc(tmp, count*sizeof(EMUFS_REG_ID));
+			tmp[count-1] = reg.id_reg;
+		}
 	}
 	fclose(f_idx);
 
@@ -226,6 +227,10 @@ EMUFS_REG_ID *emufs_idx_get(EMUFS *emu, EMUFS_REG_ID *cant)
 	return tmp;
 }
 
+/** @todo FIXME borrar cuando se cambie emufs_gui/registros.c que es el unico
+ * que lo usa.
+ * @deprecated Usar emufs_idx_buscar_registro.
+ */
 int emufs_idx_existe_id(EMUFS *emu, int ID)
 {
 	FILE *f_idx;
@@ -239,7 +244,7 @@ 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 +252,37 @@ 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;
+}
+
+long emufs_idx_get_file_size(EMUFS* efs, int* err)
+{
+	char name[255];
+	strcpy(name, efs->nombre);
+	strcat(name, EMUFS_IDX_EXT);
+	return emufs_common_get_file_size(name, err);
 }