diff options
Diffstat (limited to 'include/safe-ctype.h')
| -rw-r--r-- | include/safe-ctype.h | 39 |
1 files changed, 4 insertions, 35 deletions
diff --git a/include/safe-ctype.h b/include/safe-ctype.h index 0266bf1aa..e59b357cc 100644 --- a/include/safe-ctype.h +++ b/include/safe-ctype.h @@ -35,6 +35,10 @@ 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 @@ -112,39 +116,4 @@ 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). - So we include ctype.h here and then immediately redefine its macros. */ - -#include <ctype.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 */ |