diff options
Diffstat (limited to 'contrib/binutils/libiberty/safe-ctype.c')
| -rw-r--r-- | contrib/binutils/libiberty/safe-ctype.c | 147 |
1 files changed, 119 insertions, 28 deletions
diff --git a/contrib/binutils/libiberty/safe-ctype.c b/contrib/binutils/libiberty/safe-ctype.c index 0c2be3e..91a0e9a 100644 --- a/contrib/binutils/libiberty/safe-ctype.c +++ b/contrib/binutils/libiberty/safe-ctype.c @@ -19,20 +19,109 @@ License along with libiberty; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -/* This is a compatible replacement of the standard C library's <ctype.h> - with the following properties: - - - Implements all isxxx() macros required by C99. - - Also implements some character classes useful when - parsing C-like languages. - - Does not change behavior depending on the current locale. - - Behaves properly for all values in the range of a signed or - unsigned char. */ +/* + +@defvr Extension HOST_CHARSET +This macro indicates the basic character set and encoding used by the +host: more precisely, the encoding used for character constants in +preprocessor @samp{#if} statements (the C "execution character set"). +It is defined by @file{safe-ctype.h}, and will be an integer constant +with one of the following values: + +@ftable @code +@item HOST_CHARSET_UNKNOWN +The host character set is unknown - that is, not one of the next two +possibilities. + +@item HOST_CHARSET_ASCII +The host character set is ASCII. + +@item HOST_CHARSET_EBCDIC +The host character set is some variant of EBCDIC. (Only one of the +nineteen EBCDIC varying characters is tested; exercise caution.) +@end ftable +@end defvr + +@deffn Extension ISALPHA (@var{c}) +@deffnx Extension ISALNUM (@var{c}) +@deffnx Extension ISBLANK (@var{c}) +@deffnx Extension ISCNTRL (@var{c}) +@deffnx Extension ISDIGIT (@var{c}) +@deffnx Extension ISGRAPH (@var{c}) +@deffnx Extension ISLOWER (@var{c}) +@deffnx Extension ISPRINT (@var{c}) +@deffnx Extension ISPUNCT (@var{c}) +@deffnx Extension ISSPACE (@var{c}) +@deffnx Extension ISUPPER (@var{c}) +@deffnx Extension ISXDIGIT (@var{c}) + +These twelve macros are defined by @file{safe-ctype.h}. Each has the +same meaning as the corresponding macro (with name in lowercase) +defined by the standard header @file{ctype.h}. For example, +@code{ISALPHA} returns true for alphabetic characters and false for +others. However, there are two differences between these macros and +those provided by @file{ctype.h}: + +@itemize @bullet +@item These macros are guaranteed to have well-defined behavior for all +values representable by @code{signed char} and @code{unsigned char}, and +for @code{EOF}. + +@item These macros ignore the current locale; they are true for these +fixed sets of characters: +@multitable {@code{XDIGIT}} {yada yada yada yada yada yada yada yada} +@item @code{ALPHA} @tab @kbd{A-Za-z} +@item @code{ALNUM} @tab @kbd{A-Za-z0-9} +@item @code{BLANK} @tab @kbd{space tab} +@item @code{CNTRL} @tab @code{!PRINT} +@item @code{DIGIT} @tab @kbd{0-9} +@item @code{GRAPH} @tab @code{ALNUM || PUNCT} +@item @code{LOWER} @tab @kbd{a-z} +@item @code{PRINT} @tab @code{GRAPH ||} @kbd{space} +@item @code{PUNCT} @tab @kbd{`~!@@#$%^&*()_-=+[@{]@}\|;:'",<.>/?} +@item @code{SPACE} @tab @kbd{space tab \n \r \f \v} +@item @code{UPPER} @tab @kbd{A-Z} +@item @code{XDIGIT} @tab @kbd{0-9A-Fa-f} +@end multitable + +Note that, if the host character set is ASCII or a superset thereof, +all these macros will return false for all values of @code{char} outside +the range of 7-bit ASCII. In particular, both ISPRINT and ISCNTRL return +false for characters with numeric values from 128 to 255. +@end itemize +@end deffn + +@deffn Extension ISIDNUM (@var{c}) +@deffnx Extension ISIDST (@var{c}) +@deffnx Extension IS_VSPACE (@var{c}) +@deffnx Extension IS_NVSPACE (@var{c}) +@deffnx Extension IS_SPACE_OR_NUL (@var{c}) +@deffnx Extension IS_ISOBASIC (@var{c}) +These six macros are defined by @file{safe-ctype.h} and provide +additional character classes which are useful when doing lexical +analysis of C or similar languages. They are true for the following +sets of characters: + +@multitable {@code{SPACE_OR_NUL}} {yada yada yada yada yada yada yada yada} +@item @code{IDNUM} @tab @kbd{A-Za-z0-9_} +@item @code{IDST} @tab @kbd{A-Za-z_} +@item @code{VSPACE} @tab @kbd{\r \n} +@item @code{NVSPACE} @tab @kbd{space tab \f \v \0} +@item @code{SPACE_OR_NUL} @tab @code{VSPACE || NVSPACE} +@item @code{ISOBASIC} @tab @code{VSPACE || NVSPACE || PRINT} +@end multitable +@end deffn + +*/ #include "ansidecl.h" #include <safe-ctype.h> #include <stdio.h> /* for EOF */ +#if EOF != -1 + #error "<safe-ctype.h> requires EOF == -1" +#endif + /* Shorthand */ #define bl _sch_isblank #define cn _sch_iscntrl @@ -48,25 +137,23 @@ Boston, MA 02111-1307, USA. */ #define xd _sch_isxdigit /* Masks. */ -#define L lo|is |pr /* lower case letter */ -#define XL lo|is|xd|pr /* lowercase hex digit */ -#define U up|is |pr /* upper case letter */ -#define XU up|is|xd|pr /* uppercase hex digit */ -#define D di |xd|pr /* decimal digit */ -#define P pn |pr /* punctuation */ -#define _ pn|is |pr /* underscore */ - -#define C cn /* control character */ -#define Z nv |cn /* NUL */ -#define M nv|sp |cn /* cursor movement: \f \v */ -#define V vs|sp |cn /* vertical space: \r \n */ -#define T nv|sp|bl|cn /* tab */ -#define S nv|sp|bl|pr /* space */ +#define L (const unsigned short) (lo|is |pr) /* lower case letter */ +#define XL (const unsigned short) (lo|is|xd|pr) /* lowercase hex digit */ +#define U (const unsigned short) (up|is |pr) /* upper case letter */ +#define XU (const unsigned short) (up|is|xd|pr) /* uppercase hex digit */ +#define D (const unsigned short) (di |xd|pr) /* decimal digit */ +#define P (const unsigned short) (pn |pr) /* punctuation */ +#define _ (const unsigned short) (pn|is |pr) /* underscore */ + +#define C (const unsigned short) ( cn) /* control character */ +#define Z (const unsigned short) (nv |cn) /* NUL */ +#define M (const unsigned short) (nv|sp |cn) /* cursor movement: \f \v */ +#define V (const unsigned short) (vs|sp |cn) /* vertical space: \r \n */ +#define T (const unsigned short) (nv|sp|bl|cn) /* tab */ +#define S (const unsigned short) (nv|sp|bl|pr) /* space */ /* Are we ASCII? */ -#if '\n' == 0x0A && ' ' == 0x20 && '0' == 0x30 \ - && 'A' == 0x41 && 'a' == 0x61 && '!' == 0x21 \ - && EOF == -1 +#if HOST_CHARSET == HOST_CHARSET_ASCII const unsigned short _sch_istable[256] = { @@ -159,5 +246,9 @@ const unsigned char _sch_toupper[256] = }; #else - #error "Unsupported host character set" -#endif /* not ASCII */ +# if HOST_CHARSET == HOST_CHARSET_EBCDIC + #error "FIXME: write tables for EBCDIC" +# else + #error "Unrecognized host character set" +# endif +#endif |
