Address first round of review for generic blocks

common/readline.c

@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 200809L
 #include "readline.h"
 #include "log.h"
 #include <stdlib.h>
@@ -48,15 +49,21 @@ char *read_line(FILE *file) {
 	return string;
 }
 
-char *peek_line(FILE *file, int offset) {
-	int pos = ftell(file);
-	char *line = NULL;
+char *peek_line(FILE *file, int offset, long *position) {
+	long pos = ftell(file);
+	size_t length = 1;
+	char *line = calloc(1, length);
 	for (int i = 0; i <= offset; i++) {
-		free(line);
-		line = read_line(file);
-		if (!line) {
+		ssize_t read = getline(&line, &length, file);
+		if (read < 0) {
 			break;
 		}
+		if (line[read - 1] == '\n') {
+			line[read - 1] = '\0';
+		}
+	}
+	if (position) {
+		*position = ftell(file);
 	}
 	fseek(file, pos, SEEK_SET);
 	return line;

include/readline.h

@@ -4,7 +4,7 @@
 #include <stdio.h>
 
 char *read_line(FILE *file);
-char *peek_line(FILE *file, int offset);
+char *peek_line(FILE *file, int offset, long *position);
 char *read_line_buffer(FILE *file, char *string, size_t string_len);
 
 #endif

include/sway/commands.h

@@ -60,8 +60,8 @@ struct cmd_results *config_command(char *command);
 /**
  * Parse and handle a sub command
  */
-struct cmd_results *subcommand(char **argv, int argc,
-		struct cmd_handler *handlers, int handlers_size);
+struct cmd_results *config_subcommand(char **argv, int argc,
+		struct cmd_handler *handlers, size_t handlers_size);
 /*
  * Parses a command policy rule.
  */

sway/commands.c

@@ -376,8 +376,8 @@ cleanup:
 	return results;
 }
 
-struct cmd_results *subcommand(char **argv, int argc,
-		struct cmd_handler *handlers, int handlers_size) {
+struct cmd_results *config_subcommand(char **argv, int argc,
+		struct cmd_handler *handlers, size_t handlers_size) {
 	char *command = join_args(argv, argc);
 	wlr_log(L_DEBUG, "Subcommand: %s", command);
 	free(command);

sway/commands/bar.c

@@ -52,7 +52,7 @@ struct cmd_results *cmd_bar(int argc, char **argv) {
 			return cmd_results_new(CMD_FAILURE, "bar",
 					"Can only be used in config file.");
 		}
-		return subcommand(argv, argc, bar_config_handlers,
+		return config_subcommand(argv, argc, bar_config_handlers,
 				sizeof(bar_config_handlers));
 	}
 
@@ -111,5 +111,5 @@ struct cmd_results *cmd_bar(int argc, char **argv) {
 		wlr_log(L_DEBUG, "Creating bar %s", bar->id);
 	}
 
-	return subcommand(argv, argc, bar_handlers, sizeof(bar_handlers));
+	return config_subcommand(argv, argc, bar_handlers, sizeof(bar_handlers));
 }

sway/commands/bar/colors.c

@@ -52,7 +52,7 @@ static struct cmd_results *parse_three_colors(char ***colors,
 }
 
 struct cmd_results *bar_cmd_colors(int argc, char **argv) {
-	return subcommand(argv, argc, bar_colors_handlers,
+	return config_subcommand(argv, argc, bar_colors_handlers,
 			sizeof(bar_colors_handlers));
 }
 

sway/commands/input.c

@@ -42,8 +42,8 @@ struct cmd_results *cmd_input(int argc, char **argv) {
 		return cmd_results_new(CMD_FAILURE, NULL, "Couldn't allocate config");
 	}
 
-	struct cmd_results *res = subcommand(argv + 1, argc - 1, input_handlers,
-			sizeof(input_handlers));
+	struct cmd_results *res = config_subcommand(argv + 1, argc - 1,
+			input_handlers, sizeof(input_handlers));
 
 	free_input_config(config->handler_context.input_config);
 	config->handler_context.input_config = NULL;

sway/commands/mode.c

@@ -65,8 +65,8 @@ struct cmd_results *cmd_mode(int argc, char **argv) {
 	}
 
 	// Create binding
-	struct cmd_results *result = subcommand(argv + 1, argc - 1, mode_handlers,
-			sizeof(mode_handlers));
+	struct cmd_results *result = config_subcommand(argv + 1, argc - 1,
+			mode_handlers, sizeof(mode_handlers));
 	config->current_mode = config->modes->items[0];
 
 	return result;

sway/commands/seat.c

@@ -24,8 +24,8 @@ struct cmd_results *cmd_seat(int argc, char **argv) {
 				"Couldn't allocate config");
 	}
 
-	struct cmd_results *res = subcommand(argv + 1, argc - 1, seat_handlers,
-			sizeof(seat_handlers));
+	struct cmd_results *res = config_subcommand(argv + 1, argc - 1,
+			seat_handlers, sizeof(seat_handlers));
 
 	free_seat_config(config->handler_context.seat_config);
 	config->handler_context.seat_config = NULL;

sway/config.c

@@ -518,21 +518,20 @@ static int detect_brace_on_following_line(FILE *file, char *line,
 	int lines = 0;
 	if (line[strlen(line) - 1] != '{' && line[strlen(line) - 1] != '}') {
 		char *peeked = NULL;
+		long position = 0;
 		do {
 			wlr_log(L_DEBUG, "Peeking line %d", line_number + lines + 1);
 			free(peeked);
-			peeked = peek_line(file, lines);
+			peeked = peek_line(file, lines, &position);
 			if (peeked) {
 				peeked = strip_whitespace(peeked);
 			}
+			wlr_log(L_DEBUG, "Peeked line: `%s`", peeked);
 			lines++;
 		} while (peeked && strlen(peeked) == 0);
 
 		if (peeked && strlen(peeked) == 1 && peeked[0] == '{') {
-			for (int i = 0; i < lines; i++) {
-				free(peeked);
-				peeked = read_line(file);
-			}
+			fseek(file, position, SEEK_SET); 
 		} else {
 			lines = 0;
 		}
@@ -541,7 +540,7 @@ static int detect_brace_on_following_line(FILE *file, char *line,
 	return lines;
 }
 
-static char *expand_line(char *block, char *line, bool add_brace) {
+static char *expand_line(const char *block, const char *line, bool add_brace) {
 	int size = (block ? strlen(block) + 1 : 0) + strlen(line)
 		+ (add_brace ? 2 : 0) + 1;
 	char *expanded = calloc(1, size);
@@ -549,10 +548,8 @@ static char *expand_line(char *block, char *line, bool add_brace) {
 		wlr_log(L_ERROR, "Cannot allocate expanded line buffer");
 		return NULL;
 	}
-	strcat(expanded, block ? block : "");
-	strcat(expanded, block ? " " : "");
-	strcat(expanded, line);
-	strcat(expanded, add_brace ? " {" : "");
+	snprintf(expanded, size, "%s%s%s%s", block ? block : "",
+			block ? " " : "", line, add_brace ? " {" : "");
 	return expanded;
 }
 
@@ -594,9 +591,7 @@ bool read_config(FILE *file, struct sway_config *config) {
 			// Special case
 			res = config_commands_command(expanded);
 		} else {
-			wlr_log(L_DEBUG, "Entering c_c");
 			res = config_command(expanded);
-			wlr_log(L_DEBUG, "Exiting c_c");
 		}
 		free(expanded);
 		switch(res->status) {