Fix invert flag not being zero initialized

CMakeLists.txt

@@ -1,6 +1,7 @@
-include(CMakeDependentOption)
-cmake_minimum_required(VERSION 3.1)
 project(roflcat)
+cmake_minimum_required(VERSION 3.1)
+include(CMakeDependentOption)
+include(GNUInstallDirs)
 
 #c++17 without compiler extensions
 set(CMAKE_CXX_STANDARD 17)

TODO

@@ -1 +1,2 @@
 move GNU cat logic out of printer class to make it more modular
+fix ^` not printing

src/cmd.cpp

@@ -25,7 +25,7 @@
 #include <cstdlib> //atol
 
 cmd_args::cmd_args(void)noexcept:
-	truecol(0), color(0), number(0), ends(0), squeeze(0), tabs(0), nonprinting(0), error(0), usage(0), version(0){}
+	truecol(0), color(0), invert(0), number(0), ends(0), squeeze(0), tabs(0), nonprinting(0), treatbinary(0), error(0), usage(0), version(0){}
 void cmd_args::clear_gnu_options(void){
 	number = PRINT_LINE_NEVER;
 	ends = squeeze = tabs = nonprinting = 0;

src/roflcat.cpp

@@ -141,16 +141,25 @@ void nonprinting_notation(int in, char* dest){
 bool is_directory(const char* file){
 	struct stat st;
 	if(stat(file, &st) != 0){
-		return true;
+		return false;
 	}
 	return S_ISDIR(st.st_mode);
 }
+bool file_exists(const char* file){
+	struct stat st;
+	return stat(file, &st) == 0;
+}
 FILE* open_file(const char* file, const char* mode){
 	if(is_directory(file)){
 		fflush(stdout);
 		fprintf(stderr, "Unable to open file \"%s\": Is a directory \n", file);
 		return nullptr;
 	}
+	if(!file_exists(file)){
+		fflush(stdout);
+		fprintf(stderr, "Unable to open file \"%s\": No such file\n", file);
+		return nullptr;
+	}
 	FILE* fp = fopen(file, mode);
 	if(!fp){
 		fflush(stdout);
@@ -178,7 +187,7 @@ int real_print_files(const cmd_args& args){
 
 			if(args.treatbinary){
 				//Don't check if buf is empty because that's not how GNU cat handles Ctrl+D in middle of line
-				for(int in;(in = fgetc(stdin)) != WEOF;){
+				for(int in;(in = fgetc(stdin)) != EOF;){
 					p.print(static_cast<char>(in));
 					if(in == L'\n') //Only reset on newline to save print overhead
 						p.reset();
@@ -201,13 +210,13 @@ int real_print_files(const cmd_args& args){
 			}
 			if(args.treatbinary){
 				if(args.nonprinting){
-					for(int in;(in = fgetc(fp)) != WEOF;){
+					for(int in;(in = fgetc(fp)) != EOF;){
 						char tmp[5];
 						nonprinting_notation(in, tmp);
 						p.print(tmp);
 					}
 				}else{
-					for(int in;(in = fgetc(fp)) != WEOF;)
+					for(int in;(in = fgetc(fp)) != EOF;)
 						p.print(static_cast<char>(in));
 				}
 			}else{
@@ -267,6 +276,5 @@ int main(int argc, char** argv){
 	}else if(avail_colors == 256){
 		return print_files<basic_color_printer<256>>(args);
 	}
-
 	return 0;
 }