X-Git-Url: https://git.llucax.com/z.facultad/75.06/emufs.git/blobdiff_plain/30325d1797a0a3ecaf622c261d07366801040c88..e0748aab538eb09d53d767a305aaccc86489bf23:/tipo3/emufs.c

diff --git a/tipo3/emufs.c b/tipo3/emufs.c
index a19ded7..3d76066 100644
--- a/tipo3/emufs.c
+++ b/tipo3/emufs.c
@@ -1,8 +1,25 @@
-
 #include "emufs.h"
+#include "param_cte.h"
+
+/* Defino las extenciones que usan cada tipo de archivo */
+#define EXT_TIPO3_ID ".idx"
+#define EXT_TIPO3_DATA ".dat"
+#define EXT_TIPO3_DISP ".fsc"
+#define EXT_TIPO3_IDS ".ids"
 
-EMUFS *emufs_crear(const char *filename, int tipo)
+char *str_dup(const char *s)
 {
+	if (s == NULL) return NULL;
+	char *tmp = (char *)malloc(sizeof(char)*(strlen(s)+1));
+	strcpy(tmp, s);
+	return tmp;
+}
+
+
+EMUFS *emufs_crear(const char *filename, char tipo, unsigned int tam_bloque, unsigned int tam_reg)
+{
+	char name[255];
+	FILE *fp;
 	EMUFS *tmp = (EMUFS *)malloc(sizeof(EMUFS));
 
 	switch (tipo) {
@@ -11,6 +28,44 @@ EMUFS *emufs_crear(const char *filename, int tipo)
 		case T2:
 		break;
 		case T3:
+			tmp->tipo = T3;
+			tmp->tam_bloque = tam_bloque;
+			tmp->leer_bloque = leer_bloque;
+			tmp->leer_registro = leer_registro;
+			tmp->grabar_registro = grabar_registro;
+			tmp->borrar_registro = NULL;
+			tmp->nombre = str_dup(filename);
+
+			strcpy(name, filename);
+			strcat(name, EXT_TIPO3_DATA);
+			fp = fopen(name, "w");
+			if (fp == NULL) {
+				/* ERROR */
+				free(tmp->nombre);
+				free(tmp);
+				return NULL;
+			}
+			/* Guardo el Header */
+			fwrite(&tipo, sizeof(char), 1, fp);
+			fwrite(&tam_bloque, sizeof(unsigned int), 1, fp);
+			fwrite(&tam_reg, sizeof(unsigned int), 1, fp);
+			fclose(fp);
+			
+			strcpy(name, filename);
+			strcat(name, EXT_TIPO3_ID);
+			fp = fopen(name, "w");
+			fclose(fp);
+
+			strcpy(name, filename);
+			strcat(name, EXT_TIPO3_DISP);
+			fp = fopen(name, "w");
+			fclose(fp);
+
+			strcpy(name, filename);
+			strcat(name, EXT_TIPO3_IDS);
+			fp = fopen(name, "w");
+			fclose(fp);
+
 		break;
 		default:
 			free(tmp);
@@ -20,4 +75,88 @@ EMUFS *emufs_crear(const char *filename, int tipo)
 	return tmp;
 }
 
+EMUFS *emufs_abrir(const char *filename)
+{
+	EMUFS *tmp;
+	char name[255];
+	char tipo;
+	FILE *fp;
+
+	strcpy(name, filename);
+	strcat(name, EXT_TIPO3_DATA);
+	fp = fopen(name, "r");
+	if (fp == NULL) return NULL;
+	fread(&tipo, sizeof(char), 1, fp);
+	if ((tipo < 0) || (tipo > 2)) {
+		fclose(fp);
+		return NULL;
+	}
+	
+	tmp = (EMUFS *)malloc(sizeof(EMUFS));
+	if (tmp == NULL) return NULL;
 
+	switch (tipo) {
+		case T1:
+		break;
+		case T2:
+		break;
+		case T3:
+			tmp->tipo = tipo;
+			fread(&tmp->tam_bloque, sizeof(int), 1, fp);
+			tmp->leer_bloque = leer_bloque;
+			tmp->leer_registro = leer_registro;
+			tmp->grabar_registro = grabar_registro;
+			tmp->borrar_registro = NULL;
+			tmp->nombre = str_dup(filename);
+	}
+
+	fclose(fp);
+	return tmp;
+}
+
+int emufs_destruir(EMUFS *e)
+{
+	if (e == NULL) return 1;
+	free(e->nombre);
+	free(e);
+	return 0;
+}
+
+int ver_archivo_FS(EMUFS *emu)
+{
+	FILE *f_block_free;
+	BLOCK_FREE_T reg;
+	char name_f_block_free[255];
+	
+	strcpy(name_f_block_free,emu->nombre);
+	strcat(name_f_block_free,".fsc");
+
+	if ( (f_block_free = fopen(name_f_block_free,"r"))==NULL ){
+		printf("no pude abrir el archivo %s\n",name_f_block_free);
+		return -1;
+	}
+	fread(&reg,sizeof(reg),1,f_block_free);
+	while ( !feof(f_block_free) ){
+		printf(" Bloque = %d   Espacio libre = %d\n",reg.block, reg.free_space);
+		fread(&reg,sizeof(reg),1,f_block_free);
+	}
+	
+	fclose(f_block_free);
+
+	/* Imprimo la lista de bloques/registros */
+	strcpy(name_f_block_free,emu->nombre);
+	strcat(name_f_block_free,".fsc");
+	{
+		BLOCK_REG_T r;
+		f_block_free = fopen(name_f_block_free, "r");
+		fread(&r, sizeof(BLOCK_REG_T), 1, f_block_free);
+		while (!feof(f_block_free)) {
+			printf("ID %ld en bloque %d\n", r.id_reg, r.block);
+			fread(&r, sizeof(BLOCK_REG_T), 1, f_block_free);
+		}
+		fclose(f_block_free);
+	}
+	
+	
+	return 0;
+}