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More cleanup: sprinkled some const, removed ugly EXTERN/INTERN.h,
some rewriting of code to make it more readable and more KNF.

ok millert@ tedu@ deraadt@

/*	$OpenBSD: pch.h,v 1.7 2003/07/28 18:35:36 otto Exp $	*/

void		re_patch(void);
void		open_patch_file(const char *);
void		set_hunkmax(void);
bool		there_is_another_patch(void);
bool		another_hunk(void);
bool		pch_swap(void);
char		*pfetch(LINENUM);
short		pch_line_len(LINENUM);
LINENUM		pch_first(void);
LINENUM		pch_ptrn_lines(void);
LINENUM		pch_newfirst(void);
LINENUM		pch_repl_lines(void);
LINENUM		pch_end(void);
LINENUM		pch_context(void);
LINENUM		pch_hunk_beg(void);
char		pch_char(LINENUM);
char		*pfetch(LINENUM);
void		do_ed_script(void);