X-Git-Url: https://git.llucax.com/z.facultad/75.06/emufs.git/blobdiff_plain/75973af27108786afc7a63cbb2efa6a33ae386dc..6f3b2503934631cf86101ede3d356f5868cae46d:/emufs/fsc.c

diff --git a/emufs/fsc.c b/emufs/fsc.c
index e71d13d..17a7244 100644
--- a/emufs/fsc.c
+++ b/emufs/fsc.c
@@ -46,7 +46,7 @@ int emufs_fsc_crear(EMUFS* efs)
 }
 
 /* Agrega un registro al archivo de espacio libre en bloque. */
-int emufs_fsc_agregar(EMUFS *emu, EMUFS_BLOCK_ID n_marker, EMUFS_FREE n_freespace)
+int emufs_fsc_agregar(EMUFS *emu, EMUFS_BLOCK_ID marker, EMUFS_FREE freespace)
 {
 	FILE *f_fsc;
 	EMUFS_FSC reg;
@@ -56,8 +56,8 @@ int emufs_fsc_agregar(EMUFS *emu, EMUFS_BLOCK_ID n_marker, EMUFS_FREE n_freespac
 	strcat(name_f_fsc, EMUFS_FSC_EXT);
 	
 	/* Cargo el registro */
-	reg.n_marker = n_marker;
-	reg.n_freespace = n_freespace;
+	reg.marker = marker;
+	reg.freespace = freespace;
 
 	/* Lo guardo en el archivo al final "a+"*/
 	if ( (f_fsc = fopen(name_f_fsc,"a+"))==NULL ) return -1;
@@ -67,19 +67,19 @@ int emufs_fsc_agregar(EMUFS *emu, EMUFS_BLOCK_ID n_marker, EMUFS_FREE n_freespac
 }
 
 /* Agrega un GAP en el archivo de Gaps para Filetype 2 */
-int emufs_fsc_agregar_gap(EMUFS *emu, EMUFS_OFFSET n_marker, EMUFS_FREE n_freespace)
+int emufs_fsc_agregar_gap(EMUFS *emu, EMUFS_OFFSET marker, EMUFS_FREE freespace)
 {
   	FILE *f_fsc;
 	EMUFS_FSC gap_aux,gap_before,gap_after,gap_new;
 	char name_f_fsc[255];
-	EMUFS_REG_ID n_gap_before = 0, n_gap_after = 0;
-	unsigned long n_source,n_destination,n_filesize,n_reg_count = 0,n_moved = 0;
+	EMUFS_REG_ID pos_gap_before = 0, pos_gap_after = 0;
+	unsigned long source,destination,file_size,reg_count = 0,cant_moved = 0;
 		
 	strcpy(name_f_fsc,emu->nombre);
 	strcat(name_f_fsc, EMUFS_FSC_EXT);
 	
-	gap_before.n_marker = -1;
-	gap_after.n_marker = -1;
+	gap_before.marker = -1;
+	gap_after.marker = -1;
 	
 	/* Busco si hay un GAP por delante y/o por detras del que se esta por crear */
 	/* para en dicho caso realizar un merge! */
@@ -88,108 +88,100 @@ int emufs_fsc_agregar_gap(EMUFS *emu, EMUFS_OFFSET n_marker, EMUFS_FREE n_freesp
 		if ( fread(&gap_aux,sizeof(EMUFS_FSC),1,f_fsc) != 1) continue;
 		
 		/* Chequeo si es un gap justo anterior al nuestro */
-		if (gap_aux.n_marker+gap_aux.n_freespace == n_marker) {
-			gap_before.n_marker = gap_aux.n_marker;
-			gap_before.n_freespace = gap_aux.n_freespace;
-			n_gap_before = n_reg_count;
+		if (gap_aux.marker+gap_aux.freespace == marker) {
+			gap_before.marker = gap_aux.marker;
+			gap_before.freespace = gap_aux.freespace;
+			pos_gap_before = reg_count;
 		}
 		
 		/* Chequeo si es un gap justo posterior al nuestro */		
-		if (gap_aux.n_marker == n_marker+n_freespace) {
-			gap_after.n_marker = gap_aux.n_marker;
-			gap_after.n_freespace = gap_aux.n_freespace;
-			n_gap_after = n_reg_count;
+		if (gap_aux.marker == marker+freespace) {
+			gap_after.marker = gap_aux.marker;
+			gap_after.freespace = gap_aux.freespace;
+			pos_gap_after = reg_count;
 		}		
-		n_reg_count += 1;
+		reg_count += 1;
 	}
 	
 	/* Si no encontre gaps ni por delante ni por detras */
-	if ((gap_before.n_marker == -1) && (gap_after.n_marker == -1)) {
+	if ((gap_before.marker == -1) && (gap_after.marker == -1)) {
 		/* Lo guardo en el archivo al final */
-		gap_new.n_marker = n_marker;
-		gap_new.n_freespace = n_freespace;
+		gap_new.marker = marker;
+		gap_new.freespace = freespace;
 		fseek(f_fsc,0,SEEK_END);
 		fwrite(&gap_new,sizeof(EMUFS_FSC),1,f_fsc);
 		fclose(f_fsc);		
 	}
 	
 	/* Si encuentro un GAP Justo por delante pero no por detras */
-	if ((gap_before.n_marker != -1) && (gap_after.n_marker == -1))
+	if ((gap_before.marker != -1) && (gap_after.marker == -1))
 	{
-	  printf("fsc.c >> Found GAP justo por Delante pero no por Detras!!\n");
-	  printf("fsc.c >> Gap found is reg number %lu in .fsc file\n",n_gap_before);
 	  /* Me posiciono en el registro que indica dicho gap y lo reescribo con */
 	  /* la suma de los espacios libres */	  
-	  fseek(f_fsc,sizeof(EMUFS_FSC)*n_gap_before,0);
-      gap_new.n_marker = gap_before.n_marker;
-	  gap_new.n_freespace = gap_before.n_freespace + n_freespace;
+	  fseek(f_fsc,sizeof(EMUFS_FSC)*pos_gap_before,0);
+      gap_new.marker = gap_before.marker;
+	  gap_new.freespace = gap_before.freespace + freespace;
 	  fwrite(&gap_new,sizeof(EMUFS_FSC),1,f_fsc);
 	  fclose(f_fsc);
 	}
 	
 	/* Si encuentro un GAP Justo por detras pero no por delante */
-	if ((gap_before.n_marker == -1) && (gap_after.n_marker != -1))
-	{
-	  printf("fsc.c >> Found GAP justo por Detras pero no por Delante!!\n");
-      printf("fsc.c >> Gap found is reg number %lu in .fsc file\n",n_gap_after);		
+	if ((gap_before.marker == -1) && (gap_after.marker != -1))
+	{  
 	  /* Me posiciono en el registro que indica dicho gap y lo reescribo con */
 	  /* los datos actualizados de offset y espacio */
-	  fseek(f_fsc,sizeof(EMUFS_FSC)*n_gap_after,0);
-      gap_new.n_marker = gap_after.n_marker - n_freespace;
-	  gap_new.n_freespace = gap_after.n_freespace + n_freespace;
+	  fseek(f_fsc,sizeof(EMUFS_FSC)*pos_gap_after,0);
+      gap_new.marker = gap_after.marker - freespace;
+	  gap_new.freespace = gap_after.freespace + freespace;
 	  fwrite(&gap_new,sizeof(EMUFS_FSC),1,f_fsc);
 	  fclose(f_fsc);
 	}
 	
 	/* Finalmente, si encuentro Justo por delante y por detras..*/
-	if ((gap_before.n_marker != -1) && (gap_after.n_marker != -1))
-	{
-	  printf("fsc.c >> Found GAP justo por Delante y por Detras!!\n");
-	  printf("fsc.c >> Pre Gap found is reg number %lu in .fsc file\n",n_gap_before);	
-	  printf("fsc.c >> Post Gap found is reg number %lu in .fsc file\n",n_gap_after);		
+	if ((gap_before.marker != -1) && (gap_after.marker != -1))
+	{ 
 	  /* Guardo el nuevo GAP que posee los tres espacios sumados */
-	  if (n_gap_before < n_gap_after) {
-		fseek(f_fsc,sizeof(EMUFS_FSC)*n_gap_before,0);
-		n_destination = sizeof(EMUFS_FSC)*n_gap_after;
+	  if (pos_gap_before < pos_gap_after) {
+		fseek(f_fsc,sizeof(EMUFS_FSC)*pos_gap_before,0);
+		destination = sizeof(EMUFS_FSC)*pos_gap_after;
 	  }
 	  else {
-	  	fseek(f_fsc,sizeof(EMUFS_FSC)*n_gap_after,0);
-		n_destination = sizeof(EMUFS_FSC)*n_gap_before;
+	  	fseek(f_fsc,sizeof(EMUFS_FSC)*pos_gap_after,0);
+		destination = sizeof(EMUFS_FSC)*pos_gap_before;
 	  }
-      gap_new.n_marker = gap_before.n_marker;
-	  gap_new.n_freespace = gap_before.n_freespace + n_freespace + gap_after.n_freespace;
+      gap_new.marker = gap_before.marker;
+	  gap_new.freespace = gap_before.freespace + freespace + gap_after.freespace;
 	  fwrite(&gap_new,sizeof(EMUFS_FSC),1,f_fsc);
 		
 	  /* Preparo el escenario para la movida de registros */
-	  n_source = n_destination+sizeof(EMUFS_FSC); /* Salteo el gap que elimino! */
+	  source = destination+sizeof(EMUFS_FSC); /* Salteo el gap que elimino! */
 	  fseek(f_fsc,0,SEEK_END);
-	  n_filesize = ftell(f_fsc);
-	  n_reg_count = (n_filesize - n_source) / sizeof(EMUFS_FSC);
-	  printf("Destination: %lu  Source: %lu  Cant Regs a Mover: %lu\n",n_destination,n_source,n_reg_count);
-		
+	  file_size = ftell(f_fsc);
+	  reg_count = (file_size - source) / sizeof(EMUFS_FSC);
+	  
 	  /* Comienzo a mover */
-	  while (n_moved < n_reg_count) {
-        fseek(f_fsc,n_source,0);
+	  while (cant_moved < reg_count) {
+        fseek(f_fsc,source,0);
         fread(&gap_new,sizeof(EMUFS_FSC),1,f_fsc);
 		fseek(f_fsc,-sizeof(EMUFS_FSC)*2,SEEK_CUR);
 		fwrite(&gap_new,sizeof(EMUFS_FSC),1,f_fsc);
-		n_source += sizeof(EMUFS_FSC);		
-		++n_moved;
+		source += sizeof(EMUFS_FSC);		
+		++cant_moved;
 	  }
 	  fclose(f_fsc);
-	  truncate(name_f_fsc, n_filesize - sizeof(EMUFS_FSC));
+	  truncate(name_f_fsc, file_size - sizeof(EMUFS_FSC));
 	}	
 	
     return 0;
 }
 
 /* Elimina un registro GAP del archivo de espacios libres (gaps) */
-int emufs_fsc_remove_gap(EMUFS *emu, EMUFS_OFFSET n_marker)
+int emufs_fsc_remove_gap(EMUFS *emu, EMUFS_OFFSET marker)
 {
   	FILE *f_fsc;
 	EMUFS_FSC gap_aux;
 	char name_f_fsc[255];
-    unsigned long n_source,n_destination,n_filesize,n_reg_count = 0,n_moved = 0;	
+    unsigned long source,destination,file_size,reg_count = 0,cant_moved = 0;	
 		
 	strcpy(name_f_fsc,emu->nombre);
 	strcat(name_f_fsc, EMUFS_FSC_EXT);
@@ -198,35 +190,34 @@ int emufs_fsc_remove_gap(EMUFS *emu, EMUFS_OFFSET n_marker)
     if ((f_fsc = fopen(name_f_fsc,"r+")) == NULL) return -1; 
 	while ( !feof(f_fsc) ){
 		if ( fread(&gap_aux,sizeof(EMUFS_FSC),1,f_fsc) != 1) continue;
-		if ( gap_aux.n_marker == n_marker ) break;
+		if ( gap_aux.marker == marker ) break;
 	}
 	
 	/* Preparo el escenario para la movida de registros */
 	fseek(f_fsc,-sizeof(EMUFS_FSC),SEEK_CUR);
-	n_destination = ftell(f_fsc);
-	n_source = n_destination+sizeof(EMUFS_FSC); /* Salteo el gap a eliminar! */
+	destination = ftell(f_fsc);
+	source = destination+sizeof(EMUFS_FSC); /* Salteo el gap a eliminar! */
 	fseek(f_fsc,0,SEEK_END);
-	n_filesize = ftell(f_fsc);
-	n_reg_count = (n_filesize - n_source) / sizeof(EMUFS_FSC);
-	printf("Destination: %lu  Source: %lu  Cant Regs a Mover: %lu\n",n_destination,n_source,n_reg_count);
+	file_size = ftell(f_fsc);
+	reg_count = (file_size - source) / sizeof(EMUFS_FSC);
 		
 	/* Comienzo a mover */
-	while (n_moved < n_reg_count) {
-	  fseek(f_fsc,n_source,0);
+	while (cant_moved < reg_count) {
+	  fseek(f_fsc,source,0);
       fread(&gap_aux,sizeof(EMUFS_FSC),1,f_fsc);
 	  fseek(f_fsc,-sizeof(EMUFS_FSC)*2,SEEK_CUR);
 	  fwrite(&gap_aux,sizeof(EMUFS_FSC),1,f_fsc);
-	  n_source += sizeof(EMUFS_FSC);		
-	  ++n_moved;
+	  source += sizeof(EMUFS_FSC);		
+	  ++cant_moved;
 	}
 	fclose(f_fsc);
-	truncate(name_f_fsc, n_filesize - sizeof(EMUFS_FSC));
+	truncate(name_f_fsc, file_size - sizeof(EMUFS_FSC));
 	
 	return 0;
 }
 
 /* Objetivo: Actualiza un registro de espacio libre de acorde al FType */
-int emufs_fsc_actualizar(EMUFS *emu, EMUFS_BLOCK_ID n_marker, EMUFS_FREE n_freespace)
+int emufs_fsc_actualizar(EMUFS *emu, EMUFS_BLOCK_ID marker, EMUFS_FREE freespace)
 {
 	FILE *f_fsc;
 	EMUFS_FSC reg;
@@ -239,8 +230,8 @@ int emufs_fsc_actualizar(EMUFS *emu, EMUFS_BLOCK_ID n_marker, EMUFS_FREE n_frees
 	if ( (f_fsc = fopen(name_f_fsc,"r+")) == NULL) return -1; 
 	while ( !feof(f_fsc) ){
 		if ( fread(&reg,sizeof(EMUFS_FSC),1,f_fsc) != 1) continue;
-		if ( reg.n_marker == n_marker ){
-			reg.n_freespace = n_freespace;
+		if ( reg.marker == marker ){
+			reg.freespace = freespace;
 			fseek(f_fsc,-sizeof(EMUFS_FSC),SEEK_CUR);
 			fwrite(&reg,sizeof(EMUFS_FSC),1,f_fsc);
 			break;
@@ -251,7 +242,7 @@ int emufs_fsc_actualizar(EMUFS *emu, EMUFS_BLOCK_ID n_marker, EMUFS_FREE n_frees
 }
 
 /* Actualiza un registro de gap, en el archivo de Gaps en Disco */
-int emufs_fsc_actualizar_gap(EMUFS *emu, EMUFS_OFFSET n_marker, EMUFS_FREE n_freespace)
+int emufs_fsc_actualizar_gap(EMUFS *emu, EMUFS_OFFSET marker, EMUFS_FREE freespace)
 {
 	FILE *f_fsc;
 	EMUFS_FSC gap_aux;
@@ -264,9 +255,9 @@ int emufs_fsc_actualizar_gap(EMUFS *emu, EMUFS_OFFSET n_marker, EMUFS_FREE n_fre
 	if ( (f_fsc = fopen(name_f_fsc,"r+")) == NULL) return -1; 
 	while ( !feof(f_fsc) ){
 		if ( fread(&gap_aux,sizeof(EMUFS_FSC),1,f_fsc) != 1) continue;
-		if ( gap_aux.n_marker == n_marker ){
-			gap_aux.n_marker = n_marker + gap_aux.n_freespace - n_freespace;
-			gap_aux.n_freespace = n_freespace;
+		if ( gap_aux.marker == marker ){
+			gap_aux.marker = marker + gap_aux.freespace - freespace;
+			gap_aux.freespace = freespace;
 			fseek(f_fsc,-sizeof(EMUFS_FSC),SEEK_CUR);
 			fwrite(&gap_aux,sizeof(EMUFS_FSC),1,f_fsc);
 			break;
@@ -277,7 +268,7 @@ int emufs_fsc_actualizar_gap(EMUFS *emu, EMUFS_OFFSET n_marker, EMUFS_FREE n_fre
 }
 
 /* Me devuelve el ID del bloque u Offset del Gap donde quepa un registro, y guarda en n_freespace el espacio libre actualizado */
-EMUFS_BLOCK_ID emufs_fsc_buscar_lugar(EMUFS *emu, EMUFS_FREE n_regsize, EMUFS_FREE *n_freespace)
+EMUFS_BLOCK_ID emufs_fsc_buscar_lugar(EMUFS *emu, EMUFS_FREE reg_size, EMUFS_FREE *freespace)
 {
 	FILE *f_fsc;
 	EMUFS_FSC reg;
@@ -293,7 +284,7 @@ EMUFS_BLOCK_ID emufs_fsc_buscar_lugar(EMUFS *emu, EMUFS_FREE n_regsize, EMUFS_FR
 	/* en caso de que no se halle un espacio libre apropiado */
 	while(!feof(f_fsc)){
 		if (fread(&reg,sizeof(EMUFS_FSC),1,f_fsc) != 1) continue;
-		if (reg.n_freespace >= n_regsize) {
+		if (reg.freespace >= reg_size) {
 			found = 1;
 			break;
 		}
@@ -301,17 +292,17 @@ EMUFS_BLOCK_ID emufs_fsc_buscar_lugar(EMUFS *emu, EMUFS_FREE n_regsize, EMUFS_FR
 	
 	/* Si salio por error o por fin de archivo y no encontro space... */
 	if (!found) {
-	  reg.n_marker = EMUFS_NOT_FOUND;
-	  *n_freespace = emu->tam_bloque; 
+	  reg.marker = EMUFS_NOT_FOUND;
+	  *freespace = emu->tam_bloque; 
 	}
-	else *n_freespace = reg.n_freespace;
+	else *freespace = reg.freespace;
 	
 	fclose(f_fsc);
-	return reg.n_marker;
+	return reg.marker;
 }
 
 /* Devuelve el espacio libre de un Bloque o Gap dado */
-EMUFS_FREE emufs_fsc_get_fs(EMUFS *emu, EMUFS_BLOCK_ID n_marker)
+EMUFS_FREE emufs_fsc_get_fs(EMUFS *emu, EMUFS_BLOCK_ID marker)
 {
 	FILE *f_fsc;
 	EMUFS_FSC reg;
@@ -324,12 +315,12 @@ EMUFS_FREE emufs_fsc_get_fs(EMUFS *emu, EMUFS_BLOCK_ID n_marker)
 	if ( (f_fsc = fopen(name_f_fsc,"r"))==NULL ) return -1;
 	while ( !feof(f_fsc) ){
 		if ( fread(&reg,sizeof(EMUFS_FSC),1,f_fsc) != 1 ) continue;
-		if ( reg.n_marker == n_marker )
+		if ( reg.marker == marker )
 			break;
 	}
 		
 	fclose(f_fsc);
-	return reg.n_freespace;
+	return reg.freespace;
 }
 
 EMUFS_FREE emufs_fsc_get_total_fs(EMUFS *emu)
@@ -346,8 +337,34 @@ EMUFS_FREE emufs_fsc_get_total_fs(EMUFS *emu)
 	total = 0;
 	while ( !feof(f_fsc) ){
 		if ( fread(&reg, sizeof(EMUFS_FSC), 1, f_fsc) != 1) continue;
-		total += reg.n_freespace;
+		total += reg.freespace;
 	}
 	fclose(f_fsc);
 	return total;
 }
+/*
+EMUFS_FREE emufs_fsc_get_max_min_fs(EMUFS *emu, int *min, int *max)
+{
+	FILE *f_fsc;
+	EMUFS_FSC reg;
+	char name_f_fsc[255];
+	
+	strcpy(name_f_fsc,emu->nombre);
+	strcat(name_f_fsc, EMUFS_FSC_EXT);
+
+	*min = emu->tam_bloque;
+	*max = 0;
+	if ( (f_fsc = fopen(name_f_fsc,"r"))==NULL ) return -1;
+	
+	while ( !feof(f_fsc) ){
+		fread(&reg, sizeof(EMUFS_FSC), 1, f_fsc);
+		if (  reg.freespace < *min )
+			*min = reg.freespace;
+		if ( reg.freespace > *max )
+			*max = reg.freespace;
+	}
+
+	fclose(f_fsc);
+	return 0;
+}
+*/