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* safe-ctype.h: Remove #error when detecting that ctype.h has been

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included. Redefine the various macros provided by ctype.h as
        undefined variables.
This commit is contained in:
Joel Brobecker 2008-07-04 17:11:29 +00:00
parent d62f07d07d
commit d5721fa7de
2 changed files with 38 additions and 4 deletions
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6
include/ChangeLog
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@ -1,3 +1,9 @@
2008-07-04 Joel Brobecker <brobecker@adacore.com>
* safe-ctype.h: Remove #error when detecting that ctype.h has been
included. Redefine the various macros provided by ctype.h as
undefined variables.
2008-06-23 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* libiberty.h (XALLOCA, XDUP, XALLOCAVEC, XDUPVEC, XALLOCAVAR,

36
include/safe-ctype.h
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@ -35,10 +35,6 @@ Boston, MA 02110-1301, USA. */
#ifndef SAFE_CTYPE_H
#define SAFE_CTYPE_H
#ifdef isalpha
#error "safe-ctype.h and ctype.h may not be used simultaneously"
#endif
/* Determine host character set. */
#define HOST_CHARSET_UNKNOWN 0
#define HOST_CHARSET_ASCII 1
@ -116,4 +112,36 @@ extern const unsigned char _sch_tolower[256];
#define TOUPPER(c) _sch_toupper[(c) & 0xff]
#define TOLOWER(c) _sch_tolower[(c) & 0xff]
/* Prevent the users of safe-ctype.h from accidently using the routines
from ctype.h. Initially, the approach was to produce an error when
detecting that ctype.h has been included. But this was causing
trouble as ctype.h might get indirectly included as a result of
including another system header (for instance gnulib's stdint.h). */
#undef isalpha
#define isalpha(c) do_not_use_isalpha_with_safe_ctype
#undef isalnum
#define isalnum(c) do_not_use_isalnum_with_safe_ctype
#undef iscntrl
#define iscntrl(c) do_not_use_iscntrl_with_safe_ctype
#undef isdigit
#define isdigit(c) do_not_use_isdigit_with_safe_ctype
#undef isgraph
#define isgraph(c) do_not_use_isgraph_with_safe_ctype
#undef islower
#define islower(c) do_not_use_islower_with_safe_ctype
#undef isprint
#define isprint(c) do_not_use_isprint_with_safe_ctype
#undef ispunct
#define ispunct(c) do_not_use_ispunct_with_safe_ctype
#undef isspace
#define isspace(c) do_not_use_isspace_with_safe_ctype
#undef isupper
#define isupper(c) do_not_use_isupper_with_safe_ctype
#undef isxdigit
#define isxdigit(c) do_not_use_isxdigit_with_safe_ctype
#undef toupper
#define toupper(c) do_not_use_toupper_with_safe_ctype
#undef tolower
#define tolower(c) do_not_use_tolower_with_safe_ctype
#endif /* SAFE_CTYPE_H */