misc fixes (#69)

* Add a test for german case folding.

* Add a function to copy a string with a string with a larger allocation
  (to be used by the case folding routines)
* Add printf attributes to the printf-like functions and fix one format
  warning
* Cleanup the tempfree macro
* make more functions static
* rename fp to frp (FRame Pointer) to avoid shadowing with fp (File Pointer).
* add more const
* fix indent in UPLUS case
* add locale-aware case folding
* make nfiles size_t
* fix bugs in file closing:
    - compare fclose to EOF and pclose to -1
    - use nfiles instead of FOPEN_MAX in closeall
    - don't close files we did not open (0,1,2) fpurge/fflush instead

* - use NUL instead of 0 for char comparisons
- add ISWS() macro
- use continue; instead of ;

* Check for existance of the german locale before using it.

* Add missing parentheses, thanks Arnold.

1 files changed, 7 insertions, 3 deletions

diff --git a/proto.h b/proto.h
index 6918e1f..aac2547 100644
--- a/proto.h
+++ b/proto.h
@@ -111,6 +111,7 @@ extern	double	getfval(Cell *);
 extern	char	*getsval(Cell *);
 extern	char	*getpssval(Cell *);     /* for print */
 extern	char	*tostring(const char *);
+extern	char	*tostringN(const char *, size_t);
 extern	char	*qstring(const char *, int);
 extern	Cell	*catstr(Cell *, Cell *);
 
@@ -135,9 +136,12 @@ extern	void	yyerror(const char *);
 extern	void	fpecatch(int);
 extern	void	bracecheck(void);
 extern	void	bcheck2(int, int, int);
-extern	void	SYNTAX(const char *, ...);
-extern	void	FATAL(const char *, ...) __attribute__((__noreturn__));
-extern	void	WARNING(const char *, ...);
+extern	void	SYNTAX(const char *, ...)
+    __attribute__((__format__(__printf__, 1, 2)));
+extern	void	FATAL(const char *, ...)
+    __attribute__((__format__(__printf__, 1, 2), __noreturn__));
+extern	void	WARNING(const char *, ...)
+    __attribute__((__format__(__printf__, 1, 2)));
 extern	void	error(void);
 extern	void	eprint(void);
 extern	void	bclass(int);