[svn] Applied Philipp Thomas's safe-ctype patch. Published in

[wget] / src / safe-ctype.h

diff --git a/src/safe-ctype.h b/src/safe-ctype.h
new file mode 100644 (file)
index 0000000..d5fc649
--- /dev/null
+++ b/src/safe-ctype.h
@@ -0,0 +1,100 @@
+/* <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 */
+};
+
+/* Character classification.  */
+extern const unsigned short _sch_istable[256];
+
+#define _sch_test(c, bit) (_sch_istable[(c) & 0xff] & (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[(c) & 0xff]
+#define TOLOWER(c) _sch_tolower[(c) & 0xff]
+
+#endif /* no ctype.h */
+#endif /* SAFE_CTYPE_H */