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/* Source file current line is coming from. */
extern char *input_filename;
/* Top-level source file. */
extern char *main_input_filename;
/* Line number in current source file. */
extern int lineno;
/* Stream for reading from input file. */
extern FILE *finput;
struct file_stack
{
char *name;
struct file_stack *next;
int line;
};
/* Stack of currently pending input files.
The line member is not accurate for the innermost file on the stack. */
extern struct file_stack *input_file_stack;
/* Incremented on each change to input_file_stack. */
extern int input_file_stack_tick;
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