io.c

一个编译器修改的例子

#include "error.h"
#include "io.h"
#include "lex.h"
#include "statement.h"
#include <stdlib.h>


List	   *search_path;
FILE	   *c_out, *h_out;
const char *input_file_name = "<stdin>";


void open_input_file(const char *file_name)
{
    if (file_name != 0)
    {
	input_file_name = file_name;

	if ((yyin = fopen(file_name, "r")) == 0)
	{
	    perror("Error opening input file (fatal)");
	    exit(1);
	}
    }
}


void open_output_files(void)
{
    if ((h_out = fopen("cb.h", "w")) == 0 || (c_out = fopen("cb.c", "w")) == 0)
    {
	perror("Error opening output file (fatal)");
	exit(1);
    }

    fprintf(h_out,"#include \"rts.h\"\n");
	fprintf(c_out,"#include \"cb.h\"\n");

#ifdef DEBUG
	printf("#include \"rts.h\"\n");
	printf("#include \"cb.h\"\n");
#endif
}


void close_files(void)
{
    fclose(yyin);
    fclose(c_out);
    fclose(h_out);
}