main.c

#include <stdio.h>

#include "preoop.h"
#include "exception.h"

#define objects(a, b) objectList(a,\
	objectEntry(fileReader, b)\
)

object(fileReader,
	members {
		FILE *handle;
		size_t size;
		char *buffer;
	};
	
	fileReader *method(fileReader, init, char *filename) {
		enum {
			NO_ERROR,
			ERROR_FOPEN,
			ERROR_MALLOC,
			errorCount,
		};
		
		char *errors[errorCount] = {
			[ERROR_FOPEN] = "Could not open file",
			[ERROR_MALLOC] = "Could not allocate memory",
		};
		
		try(
			self->handle = fopen(filename, "rb");
			if(!self->handle) throw(ERROR_FOPEN);
			
			fseek(self->handle, 0, SEEK_END);
			self->size = ftell(self->handle);
			
			self->buffer = malloc(self->size);
			if(!self->buffer) throw(ERROR_MALLOC);
		);
		
		catch(ERROR_FOPEN || ERROR_MALLOC) {
			printf("%s!\n", errors[e]);
			
			free(self);
			return NULL;
		}
		
		rewind(self->handle);
		fread(self->buffer, self->size, 1, self->handle);
		
		fclose(self->handle);
		
		return self;
	}
)

int main(void) {
	fileReader *input = new(fileReader, "main.c");
	if(!input) return 0;
	
	printf("%.*s\n", input->size, input->buffer);
	
	free(input->buffer);
	free(input);
	
	return 0;
}