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Trigger gcc warning if isFoo macros are called with plain char. 

* libc/include/ctype.h (isalpha, isupper, islower, isdigit)
(isxdigit, isspace, ispunct, isalnum, isprint, isgraph)
(iscntrl, isblank, toupper, tolower): Rewrite to let 'gcc -Wall'
warn when user calls macro with a char argument.
This commit is contained in:
Eric Blake 2009-04-24 12:20:07 +00:00
parent 5921804481
commit 1335bf3c5d
2 changed files with 53 additions and 39 deletions
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8
newlib/ChangeLog
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@ -1,3 +1,11 @@
2009-04-24 Eric Blake <ebb9@byu.net>
Trigger gcc warning if isFoo macros are called with plain char.
* libc/include/ctype.h (isalpha, isupper, islower, isdigit)
(isxdigit, isspace, ispunct, isalnum, isprint, isgraph)
(iscntrl, isblank, toupper, tolower): Rewrite to let 'gcc -Wall'
warn when user calls macro with a char argument.
2009-04-23 Mike Burgess <wizardsguild@earthlink.net>
* libc/string/strcasecmp.c: Optimized rewrite.

34
newlib/libc/include/ctype.h
View File

@ -45,22 +45,26 @@ _CONST
extern __IMPORT char *__ctype_ptr__;
#ifndef __cplusplus
#define isalpha(c) ((__ctype_ptr__)[(unsigned)((c)+1)]&(_U|_L))
#define isupper(c) (((__ctype_ptr__)[(unsigned)((c)+1)]&(_U|_L))==_U)
#define islower(c) (((__ctype_ptr__)[(unsigned)((c)+1)]&(_U|_L))==_L)
#define isdigit(c) ((__ctype_ptr__)[(unsigned)((c)+1)]&_N)
#define isxdigit(c) ((__ctype_ptr__)[(unsigned)((c)+1)]&(_X|_N))
#define isspace(c) ((__ctype_ptr__)[(unsigned)((c)+1)]&_S)
#define ispunct(c) ((__ctype_ptr__)[(unsigned)((c)+1)]&_P)
#define isalnum(c) ((__ctype_ptr__)[(unsigned)((c)+1)]&(_U|_L|_N))
#define isprint(c) ((__ctype_ptr__)[(unsigned)((c)+1)]&(_P|_U|_L|_N|_B))
#define isgraph(c) ((__ctype_ptr__)[(unsigned)((c)+1)]&(_P|_U|_L|_N))
#define iscntrl(c) ((__ctype_ptr__)[(unsigned)((c)+1)]&_C)
/* These macros are intentionally written in a manner that will trigger
a gcc -Wall warning if the user mistakenly passes a 'char' instead
of an int containing an 'unsigned char'. */
#define isalpha(c) ((__ctype_ptr__+1)[c]&(_U|_L))
#define isupper(c) (((__ctype_ptr__+1)[c]&(_U|_L))==_U)
#define islower(c) (((__ctype_ptr__+1)[c]&(_U|_L))==_L)
#define isdigit(c) ((__ctype_ptr__+1)[c]&_N)
#define isxdigit(c) ((__ctype_ptr__+1)[c]&(_X|_N))
#define isspace(c) ((__ctype_ptr__+1)[c]&_S)
#define ispunct(c) ((__ctype_ptr__+1)[c]&_P)
#define isalnum(c) ((__ctype_ptr__+1)[c]&(_U|_L|_N))
#define isprint(c) ((__ctype_ptr__+1)[c]&(_P|_U|_L|_N|_B))
#define isgraph(c) ((__ctype_ptr__+1)[c]&(_P|_U|_L|_N))
#define iscntrl(c) ((__ctype_ptr__+1)[c]&_C)
#if defined(__GNUC__) && \
(!defined(__STRICT_ANSI__) || __STDC_VERSION__ >= 199901L)
#define isblank(c) \
__extension__ ({ int __c = (c); ((__ctype_ptr__)[(unsigned)((__c)+1)]&_B) || (__c) == '\t';})
__extension__ ({ __typeof__ (c) __c = (c); \
((__ctype_ptr__+1)[__c]&_B) || (__c) == '\t';})
#endif
@ -69,9 +73,11 @@ extern __IMPORT char *__ctype_ptr__;
disabled if the system supports the extended character sets. */
# if defined(__GNUC__) && !defined (_MB_EXTENDED_CHARSETS_ISO) && !defined (_MB_EXTENDED_CHARSETS_WINDOWS)
# define toupper(c) \
__extension__ ({ int __x = (c); islower(__x) ? (__x - 'a' + 'A') : __x;})
__extension__ ({ __typeof__ (c) __x = (c); \
islower(__x) ? (__x - 'a' + 'A') : __x;})
# define tolower(c) \
__extension__ ({ int __x = (c); isupper(__x) ? (__x - 'A' + 'a') : __x;})
__extension__ ({ __typeof__ (c) __x = (c); \
isupper(__x) ? (__x - 'A' + 'a') : __x;})
#endif
#endif /* !__cplusplus */