%{

#include <stdio.h>

FILE* outfile1 = NULL;
FILE* outfile2 = NULL;
FILE* interface_file = NULL;

%}

%option noyywrap
%option nounput
%option noinput

%x LEX_STATE_EXPORT
%x LEX_STATE_EXPORT_FUNCTION

%%

<INITIAL,LEX_STATE_EXPORT>. fprintf(outfile1, "%s", yytext); fprintf(outfile2, "%s", yytext);
<INITIAL>\n fprintf(outfile1, "%s", yytext); fprintf(outfile2, "%s", yytext);
<INITIAL>"$export_split" BEGIN(LEX_STATE_EXPORT);

<LEX_STATE_EXPORT>"function" fprintf(outfile1, "function"); fprintf(outfile2, "function"); fprintf(interface_file, "function"); BEGIN(LEX_STATE_EXPORT_FUNCTION);
<LEX_STATE_EXPORT_FUNCTION>"{" fprintf(outfile1, "{"); fprintf(outfile2, "{"); fprintf(interface_file, "{return 0;}"); BEGIN(INITIAL);
<LEX_STATE_EXPORT_FUNCTION>(.|\n) fprintf(outfile1, "%s", yytext); fprintf(outfile2, "%s", yytext); fprintf(interface_file, "%s", yytext);
<LEX_STATE_EXPORT>\n fprintf(outfile1, "\n"); fprintf(outfile2, "\n"); fprintf(interface_file, "\n"); BEGIN(INITIAL);

%%

int main(int argn, char** argv)
{
	if(argn < 4)
	{
		printf("Give output file as argument.\n");
		return 1;
	}

	outfile1 = fopen(argv[1], "w");
	outfile2 = fopen(argv[2], "w");
	interface_file = fopen(argv[3], "w");

	yylex();

	fclose(outfile1);
	fclose(outfile2);
	fclose(interface_file);

	return 0;
}