Added option to not write to restore file and fixed a lot of restore file issues

include/cmd.h

@@ -29,6 +29,9 @@
 #define OP_VERSION 254
 #define OP_USAGE   255
 
+#define ARG_FLAG_NONE    0
+#define ARG_FLAG_NO_SAVE 1
+
 struct cmd_arg{
 	const char* lopt;
 	const char* sopt;
@@ -48,7 +51,11 @@ struct arg_values{
 	//NULL means all devices
 	const char* device;
 
-	//What value to put in the backlight file
+	//starting brightness
+	int act_start;
+	//value to write in backlight file
+	int act_delta;
+	//output percentage
 	float delta;
 
 	//How many seconds to transition
@@ -60,6 +67,7 @@ struct arg_values{
 		int operation;
 		int num_values;
 	};
+	int flags;
 };
 
 

include/restore.h

@@ -24,8 +24,8 @@
 #include "common.h"
 #include "cmd.h"
 
-void save_restore_file(struct string_array* devices);
+void save_restore_file(struct string_array* devices, struct arg_values* args);
-int restore_to_delta(struct arg_values* curr, RJP_value** root, int* try_restore);
+int restore_to_delta(struct arg_values* curr);
 void prep_restore(struct arg_values* a);
 RJP_value* find_matching_json_device(const char* name, RJP_value* root);
 RJP_value* read_restore_file(const char* file);

src/cmd.c

@@ -58,6 +58,9 @@
 #define RESTORE_LONG_OPT  "--restore"
 #define RESTORE_SHORT_OPT "-R"
 #define RESTORE_XBACK_OPT NO_OPT
+#define NO_SAVE_LONG_OPT  "--no-save"
+#define NO_SAVE_SHORT_OPT "-N"
+#define NO_SAVE_XBACK_OPT NO_OPT
 
 #define DEVICE_DESC  "select which device to control"
 #define FADE_DESC    "change brightness over time interval"
@@ -70,6 +73,7 @@
 #define INC_DESC     "increase backlight device by specified value"
 #define DEC_DESC     "decrease backlight device by specified value"
 #define RESTORE_DESC "reassign previously saved device values"
+#define NO_SAVE_DESC "do not write any data to the restore file"
 
 static inline int strcmp_handle_null(const char* one, const char* two){
 	if(!one)
@@ -102,13 +106,14 @@ struct cmd_arg rexbacklight_args[] = {
 	OPTION(LIST),
 #ifdef ENABLE_RESTORE_FILE
 	OPTION(RESTORE),
+	OPTION(NO_SAVE),
 #endif
 	OPTION(HELP),
 	OPTION(VERSION)
 };
 
 int rexbacklight_args_length = sizeof(rexbacklight_args) / sizeof(rexbacklight_args[0]);
-
+\
 //Clean up a cmd_arg struct
 void free_cmd_args(struct arg_values* a){
 	if(!a->next)
@@ -135,7 +140,7 @@ void free_cmd_args(struct arg_values* a){
 	}while(0);
 
 struct arg_values init_arg_values(void){
-	return (struct arg_values){.next = NULL, .device = NULL, .delta = 0, .fade_duration = 0, .fade_steps = 20, .operation = 0};
+	return (struct arg_values){.next = NULL, .device = NULL, .delta = 0, .fade_duration = 0, .fade_steps = 20, .operation = 0, .flags = 0};
 }
 
 //Convert command line arguments to flags
@@ -191,14 +196,14 @@ struct arg_values process_cmd_args(int argc, char** argv){
 		}
 
 		else if(CHECK_OPTION(LIST, argv[i])){
-			free_cmd_args(&ret);
+			curr->operation = OP_LIST;
-			ret.operation = OP_LIST;
-			ret.next = NULL;
-			return ret;
 		}
 #ifdef ENABLE_RESTORE_FILE
 		else if(CHECK_OPTION(RESTORE, argv[i])){
-			ret.operation = OP_RESTORE;
+			curr->operation = OP_RESTORE;
+		}
+		else if(CHECK_OPTION(NO_SAVE, argv[i])){
+			curr->flags |= ARG_FLAG_NO_SAVE;
 		}
 #endif
 		else if(!strcmp(argv[i], "max")){
@@ -290,7 +295,9 @@ struct arg_values process_cmd_args(int argc, char** argv){
 				curr->operation = ret.operation;
 				if(!curr->delta)
 					curr->delta = ret.delta;
-
+			}
+			if(curr->flags == ARG_FLAG_NONE){
+				curr->flags = ret.flags;
 			}
 		}
 	}

src/restore.c

@@ -66,7 +66,6 @@ RJP_value* read_restore_file(const char* file){
 	int i;
 	FILE* fp = fopen(file, "r");
 	if(!fp){
-		fprintf(stderr, "Could not restore! No restore file found!\n");
 		return NULL;
 	}
 
@@ -83,6 +82,16 @@ RJP_value* read_restore_file(const char* file){
 	return root;
 }
 
+static RJP_value* restore_file_handle(void){
+	static RJP_value* rf = NULL;
+	if(!rf){
+		char* f = restore_file();
+		rf = read_restore_file(f);
+		free(f);
+	}
+	return rf;
+}
+
 RJP_value* find_matching_json_device(const char* name, RJP_value* root){
 	for(RJP_value* curr = rjp_get_member(root);curr;curr = rjp_next_member(curr)){
 		if(!strcmp(rjp_member_name(curr), name)){
@@ -93,17 +102,13 @@ RJP_value* find_matching_json_device(const char* name, RJP_value* root){
 }
 
 //convert a restoration operation to a set operation
-int restore_to_delta(struct arg_values* curr, RJP_value** root, int* try_restore){
+int restore_to_delta(struct arg_values* curr){
-	if(!*root && *try_restore){
+	RJP_value* root = restore_file_handle();
-		char* tmp = restore_file();
+	if(!root){
-		*root = read_restore_file(tmp);
+		fprintf(stderr, "Could not restore! No restore file found!\n");
-		free(tmp);
-		if(!*root){
-			*try_restore = 0;
 		return 0;
 	}
-	}
+	RJP_value* match = find_matching_json_device(curr->device, root);
-	RJP_value* match = find_matching_json_device(curr->device, *root);
 	if(!match){
 		fprintf(stderr, "No matching device '%s' in restore file!\n", curr->device);
 		return 0;
@@ -113,43 +118,38 @@ int restore_to_delta(struct arg_values* curr, RJP_value** root, int* try_restore
 	return 1;
 }
 void prep_restore(struct arg_values* a){
-	RJP_value* root = 0;
-	int try_restore = 1;
 	for(struct arg_values* curr = a;curr;curr = curr->next){
-		restore_to_delta(curr, &root, &try_restore);
+		restore_to_delta(curr);
 	}
-	rjp_free_value(root);
 }
 
-void save_restore_file(struct string_array* devices){
+void save_restore_file(struct string_array* devices, struct arg_values* args){
- 	RJP_value* root = rjp_init_json();
+	RJP_value* rf = restore_file_handle();
-	for(size_t i = 0;i < devices->size;++i){
+	if(!rf)
-		if(chdir(devices->list[i])){
+		rf = rjp_init_json();
-			io_error_2(IO_ERROR_OPEN, IO_ERROR_DIR, device_dir(), devices->list[i]);
+	for(RJP_value* mem = rjp_get_member(rf);mem;mem = rjp_next_member(mem)){
-			return_value = RETVAL_INVALID_DIR;
+		for(struct arg_values* curr = args->next, *prev = args;curr;prev = curr, curr = curr->next){
+			if(curr->operation != OP_SET || curr->flags & ARG_FLAG_NO_SAVE){
+				prev->next = curr->next;
+				free(curr);
+				curr = prev;
 				continue;
 			}
-		size_t esc_name_len = rjp_escape_strlen(devices->list[i]);
+			if(!strcmp(rjp_member_name(mem), curr->device)){
-		char* esc_str = rjp_alloc(esc_name_len + 1);
+				rjp_set_value(mem, rjp_dfloat(curr->delta));
-		rjp_escape_strcpy(esc_str, devices->list[i]);
+				prev->next = curr->next;
+				free(curr);
+				break;
+			}
+		}
+	}
+	for(struct arg_values* curr = args->next;curr;curr = curr->next){
+		if(curr->operation == OP_SET)
+			rjp_add_member(rf, curr->device, 0, rjp_dfloat(curr->delta));
+	}
+	free_cmd_args(args);
 
-		float curr = get_brightness(brightness_file());
+	char* tmp = rjp_to_json(rf);
-		float max = get_brightness(max_brightness_file());
-		if(return_value == RETVAL_INVALID_FILE && (!curr || !max)){
-			rjp_add_member(root, 0, esc_str, 0, rjp_null());
-		}else{
-			rjp_add_member(root, 0, esc_str, 0, rjp_dfloat(curr/max*100));
-		}
-
-		if(chdir(device_dir())){
-			io_error(IO_ERROR_OPEN, IO_ERROR_DIR, device_dir());
-			return_value = RETVAL_INVALID_DIR;
-			rjp_free_value(root);
-			free(esc_str);
-			return;
-		}
-	}
-	char* tmp = rjp_to_json(root);
 	char* rfil = restore_file();
 	FILE* restf = fopen(rfil, "w");
 	if(!restf){
@@ -160,7 +160,7 @@ void save_restore_file(struct string_array* devices){
 	}
 	free(rfil);
 	rjp_free(tmp);
-	rjp_free_value(root);
+	rjp_free_value(rf);
 }
 
 

src/rexbacklight.c

@@ -163,14 +163,14 @@ void sleep_for(double time){
 }
 
 //update brightness incrementally over requested millisecond time interval
-void fade_out(struct arg_values* arg, int iv, int fv){
+void fade_out(struct arg_values* arg){
 	FILE* fd;
 	double start, end;
 	double tdelta = 0;       //amount of time that has passed in ms
-	float value = iv;        //current value to write to file
+	float value = arg->act_start;        //current value to write to file
 	double step_delta = (double)arg->fade_duration / arg->fade_steps;
 	double step_inc = step_delta;
-	float brdelta = (float)(fv - iv) / arg->fade_steps; //amount brightness needs to change per iteration
+	float brdelta = (float)(arg->act_delta - arg->act_start) / arg->fade_steps; //amount brightness needs to change per iteration
 
 	while(arg->fade_duration > tdelta){
 		//write
@@ -205,38 +205,45 @@ void fade_out(struct arg_values* arg, int iv, int fv){
 		return_value = RETVAL_INVALID_FILE;
 		return;
 	}
-	fprintf(fd, "%d", fv);
+	fprintf(fd, "%d", arg->act_delta);
 
 	fclose(fd);
-}
-
-//Write value to device files
-int do_assignment(struct arg_values* args){
-	for(;args;args = args->next){
-		if(chdir(args->device)){
-			io_error_2(IO_ERROR_OPEN, IO_ERROR_DIR, device_dir(), args->device);
-			return_value = RETVAL_INVALID_DIR;
-			continue;
-		}
-		int start = get_brightness(brightness_file());
-		int out = process_op(args, 0, start, get_brightness(max_brightness_file()));
-		fade_out(args, start, out);
 	if(chdir(device_dir())){
 		io_error(IO_ERROR_OPEN, IO_ERROR_DIR, device_dir());
+		return_value = RETVAL_INVALID_DIR;
+		return;
+	}
+}
+
+int prep_offset(struct arg_values* args){
+	if(chdir(args->device)){
+		io_error_2(IO_ERROR_OPEN, IO_ERROR_DIR, device_dir(), args->device);
 		return RETVAL_INVALID_DIR;
 	}
+	args->act_start = get_brightness(brightness_file());
+	float act_max = get_brightness(max_brightness_file());
+	args->act_delta = process_op(args, 0, args->act_start, act_max);
+	float start_pec = (args->act_start / act_max) * 100.0;
+	if(args->operation == OP_INC){
+		args->delta = start_pec + args->delta;
+	}else if(args->operation == OP_DEC){
+		args->delta = start_pec - args->delta;
 	}
-	return return_value;
+	if(args->delta > 100)
+		args->delta = 100;
+	else if(args->delta < 0)
+		args->delta = 0;
+	args->operation = OP_SET;
+	//chdir back in do_assignment
+	return 0;
 }
 
 //Run get operation
 int do_get(struct arg_values* args){
-	for(;args;args = args->next){
 	float curr, max;
 	if(chdir(args->device)){
 		io_error_2(IO_ERROR_OPEN, IO_ERROR_DIR, device_dir(), args->device);
-			return_value = RETVAL_INVALID_DIR;
+		return RETVAL_INVALID_DIR;
-			continue;
 	}
 	curr = get_brightness(brightness_file());
 	max = get_brightness(max_brightness_file());
@@ -249,62 +256,38 @@ int do_get(struct arg_values* args){
 		io_error(IO_ERROR_OPEN, IO_ERROR_DIR, device_dir());
 		return RETVAL_INVALID_DIR;
 	}
-	}
 	return return_value;
 }
 //Run list operation
 void do_list(struct arg_values* args){
-	for(;args;args = args->next){
 	printf("%s\n", args->device);
 }
-}
-
-//move next arg in src list to next arg in dest list
-void extract_next_arg(struct arg_values* dest, struct arg_values* src){
-	dest->next = src->next;
-	src->next = src->next->next;
-	dest->next->next = NULL;
-}
-
-//remove all args in src which have the specified operation and append them to dest
-struct arg_values* extract_operation(int operation, struct arg_values* dest, struct arg_values* src){
-	struct arg_values* curr_dest = dest;
-	dest->next = NULL;
-	for(struct arg_values* curr_src = src;curr_src->next;){
-		if(curr_src->next->operation & operation){
-			extract_next_arg(curr_dest, curr_src);
-			curr_dest = curr_dest->next;
-		}else{
-			curr_src = curr_src->next;
-		}
-	}
-	return curr_dest;
-}
 
 //Run requested operation on a per device basis
 void run_device_operations(struct arg_values* a){
-	struct arg_values* curr;
+	for(a = a->next;a;a = a->next){
-	struct arg_values current_op_args = {0};
+		switch(a->operation){
-
+		case OP_LIST:
-	//list
+			do_list(a);
-	extract_operation(OP_LIST, &current_op_args, a);
+			break;
-	do_list(current_op_args.next);
+		case OP_GET:
-	free_cmd_args(&current_op_args);
+			return_value = do_get(a);
-
+			break;
-	//get
-	extract_operation(OP_GET, &current_op_args, a);
-	return_value = do_get(current_op_args.next);
-	free_cmd_args(&current_op_args);
-
-	//assignment
 #ifdef ENABLE_RESTORE_FILE
-	curr = extract_operation(OP_RESTORE, &current_op_args, a);
+		case OP_RESTORE:
-	prep_restore(current_op_args.next);
+			if(!restore_to_delta(a)){
+				continue;
+			}
 #endif
-	extract_operation(OP_SET | OP_INC | OP_DEC, curr, a);
+		case OP_INC:
-	return_value = do_assignment(current_op_args.next);
+		case OP_DEC:
-	free_cmd_args(&current_op_args);
+		case OP_SET:
-
+			if(prep_offset(a))
+				break;
+			fade_out(a);
+			break;
+		};
+	}
 }
 
 //If a global operation is requested, run this to fill arg with all devices, each with the global operation
@@ -317,6 +300,7 @@ void populate_args(struct arg_values* arg, struct string_array* devices){
 		curr->next->fade_duration = arg->fade_duration;
 		curr->next->fade_steps = arg->fade_steps;
 		curr->next->operation = arg->operation;
+		curr->next->flags = arg->flags;
 		curr = curr->next;
 	}
 	curr->next = NULL;
@@ -378,10 +362,9 @@ int main(int argc, char** argv){
 	}
 	run_device_operations(&args);
 #ifdef ENABLE_RESTORE_FILE
-	save_restore_file(&device_names);
+	save_restore_file(&device_names, &args); //performs cleanup on args
 #endif
 
 	free_string_array(&device_names);
-	free_cmd_args(&args);
 	return return_value;
 }