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authorChristopher Faylor <me+cygwin@cgf.cx>2000-12-08 03:28:41 +0000
committerChristopher Faylor <me+cygwin@cgf.cx>2000-12-08 03:28:41 +0000
commit39cd2525463aab63af6a9b111a01fb2b37e1733a (patch)
tree176fdb4a8838a563bbf6b7ac88c4835e4451e891 /include
parent2c6c60181272363057d71b8179af1db734ce27d3 (diff)
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Actually add safe-ctype.h
Diffstat (limited to 'include')
-rw-r--r--include/safe-ctype.h105
1 files changed, 105 insertions, 0 deletions
diff --git a/include/safe-ctype.h b/include/safe-ctype.h
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--- /dev/null
+++ b/include/safe-ctype.h
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+/* <ctype.h> replacement macros.
+
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ Contributed by Zack Weinberg <zackw@stanford.edu>.
+
+This file is part of the libiberty library.
+Libiberty is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+Libiberty is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+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.
+
+ To avoid conflicts, this header defines the isxxx functions in upper
+ case, e.g. ISALPHA not isalpha. */
+
+#ifndef SAFE_CTYPE_H
+#define SAFE_CTYPE_H
+
+#ifdef isalpha
+ #error "safe-ctype.h and ctype.h may not be used simultaneously"
+#else
+
+/* Categories. */
+
+enum {
+ /* In C99 */
+ _sch_isblank = 0x0001, /* space \t */
+ _sch_iscntrl = 0x0002, /* nonprinting characters */
+ _sch_isdigit = 0x0004, /* 0-9 */
+ _sch_islower = 0x0008, /* a-z */
+ _sch_isprint = 0x0010, /* any printing character including ' ' */
+ _sch_ispunct = 0x0020, /* all punctuation */
+ _sch_isspace = 0x0040, /* space \t \n \r \f \v */
+ _sch_isupper = 0x0080, /* A-Z */
+ _sch_isxdigit = 0x0100, /* 0-9A-Fa-f */
+
+ /* Extra categories useful to cpplib. */
+ _sch_isidst = 0x0200, /* A-Za-z_ */
+ _sch_isvsp = 0x0400, /* \n \r */
+ _sch_isnvsp = 0x0800, /* space \t \f \v \0 */
+
+ /* Combinations of the above. */
+ _sch_isalpha = _sch_isupper|_sch_islower, /* A-Za-z */
+ _sch_isalnum = _sch_isalpha|_sch_isdigit, /* A-Za-z0-9 */
+ _sch_isidnum = _sch_isidst|_sch_isdigit, /* A-Za-z0-9_ */
+ _sch_isgraph = _sch_isalnum|_sch_ispunct, /* isprint and not space */
+ _sch_iscppsp = _sch_isvsp|_sch_isnvsp /* isspace + \0 */
+};
+
+/* This code fundamentally assumes that a byte is 8 bits. Test this
+ at compile time. */
+
+extern int a_byte_isnt_eight_bits[(unsigned char)256 == 0 ? 1 : -1];
+
+/* Character classification. */
+extern const unsigned short _sch_istable[256];
+
+#define _sch_test(c, bit) (_sch_istable[(int)(unsigned char)(c)] & (bit))
+
+#define ISALPHA(c) _sch_test(c, _sch_isalpha)
+#define ISALNUM(c) _sch_test(c, _sch_isalnum)
+#define ISBLANK(c) _sch_test(c, _sch_isblank)
+#define ISCNTRL(c) _sch_test(c, _sch_iscntrl)
+#define ISDIGIT(c) _sch_test(c, _sch_isdigit)
+#define ISGRAPH(c) _sch_test(c, _sch_isgraph)
+#define ISLOWER(c) _sch_test(c, _sch_islower)
+#define ISPRINT(c) _sch_test(c, _sch_isprint)
+#define ISPUNCT(c) _sch_test(c, _sch_ispunct)
+#define ISSPACE(c) _sch_test(c, _sch_isspace)
+#define ISUPPER(c) _sch_test(c, _sch_isupper)
+#define ISXDIGIT(c) _sch_test(c, _sch_isxdigit)
+
+#define ISIDNUM(c) _sch_test(c, _sch_isidnum)
+#define ISIDST(c) _sch_test(c, _sch_isidst)
+#define IS_VSPACE(c) _sch_test(c, _sch_isvsp)
+#define IS_NVSPACE(c) _sch_test(c, _sch_isnvsp)
+#define IS_SPACE_OR_NUL(c) _sch_test(c, _sch_iscppsp)
+
+/* Character transformation. */
+extern const unsigned char _sch_toupper[256];
+extern const unsigned char _sch_tolower[256];
+#define TOUPPER(c) _sch_toupper[(int)(unsigned char)(c)]
+#define TOLOWER(c) _sch_tolower[(int)(unsigned char)(c)]
+
+#endif /* no ctype.h */
+#endif /* SAFE_CTYPE_H */