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+/* $Id$ */
+/* 
+ * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
+ * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+ */
+#ifndef __PJ_CTYPE_H__
+#define __PJ_CTYPE_H__
+
+/**
+ * @file ctype.h
+ * @brief C type helper macros.
+ */
+
+#include <pj/types.h>
+#include <pj/compat/ctype.h>
+
+PJ_BEGIN_DECL
+
+/**
+ * @defgroup pj_ctype ctype - Character Type
+ * @ingroup PJ_MISC
+ * @{
+ *
+ * This module contains several inline functions/macros for testing or
+ * manipulating character types. It is provided in PJLIB because PJLIB
+ * must not depend to LIBC.
+ */
+
+/** 
+ * Returns a non-zero value if either isalpha or isdigit is true for c.
+ * @param c     The integer character to test.
+ * @return      Non-zero value if either isalpha or isdigit is true for c.
+ */
+PJ_INLINE(int) pj_isalnum(unsigned char c) { return isalnum(c); }
+
+/** 
+ * Returns a non-zero value if c is a particular representation of an 
+ * alphabetic character.
+ * @param c     The integer character to test.
+ * @return      Non-zero value if c is a particular representation of an 
+ *              alphabetic character.
+ */
+PJ_INLINE(int) pj_isalpha(unsigned char c) { return isalpha(c); }
+
+/** 
+ * Returns a non-zero value if c is a particular representation of an 
+ * ASCII character.
+ * @param c     The integer character to test.
+ * @return      Non-zero value if c is a particular representation of 
+ *              an ASCII character.
+ */
+PJ_INLINE(int) pj_isascii(unsigned char c) { return c<128; }
+
+/** 
+ * Returns a non-zero value if c is a particular representation of 
+ * a decimal-digit character.
+ * @param c     The integer character to test.
+ * @return      Non-zero value if c is a particular representation of 
+ *              a decimal-digit character.
+ */
+PJ_INLINE(int) pj_isdigit(unsigned char c) { return isdigit(c); }
+
+/** 
+ * Returns a non-zero value if c is a particular representation of 
+ * a space character (0x09 - 0x0D or 0x20).
+ * @param c     The integer character to test.
+ * @return      Non-zero value if c is a particular representation of 
+ *              a space character (0x09 - 0x0D or 0x20).
+ */
+PJ_INLINE(int) pj_isspace(unsigned char c) { return isspace(c); }
+
+/** 
+ * Returns a non-zero value if c is a particular representation of 
+ * a lowercase character.
+ * @param c     The integer character to test.
+ * @return      Non-zero value if c is a particular representation of 
+ *              a lowercase character.
+ */
+PJ_INLINE(int) pj_islower(unsigned char c) { return islower(c); }
+
+
+/** 
+ * Returns a non-zero value if c is a particular representation of 
+ * a uppercase character.
+ * @param c     The integer character to test.
+ * @return      Non-zero value if c is a particular representation of 
+ *              a uppercase character.
+ */
+PJ_INLINE(int) pj_isupper(unsigned char c) { return isupper(c); }
+
+/**
+ * Returns a non-zero value if c is a either a space (' ') or horizontal
+ * tab ('\\t') character.
+ * @param c     The integer character to test.
+ * @return      Non-zero value if c is a either a space (' ') or horizontal
+ *              tab ('\\t') character.
+ */
+PJ_INLINE(int) pj_isblank(unsigned char c) { return isblank(c); }
+
+/**
+ * Converts character to lowercase.
+ * @param c     The integer character to convert.
+ * @return      Lowercase character of c.
+ */
+PJ_INLINE(int) pj_tolower(unsigned char c) { return tolower(c); }
+
+/**
+ * Converts character to uppercase.
+ * @param c     The integer character to convert.
+ * @return      Uppercase character of c.
+ */
+PJ_INLINE(int) pj_toupper(unsigned char c) { return toupper(c); }
+
+/**
+ * Returns a non-zero value if c is a particular representation of 
+ * an hexadecimal digit character.
+ * @param c     The integer character to test.
+ * @return      Non-zero value if c is a particular representation of 
+ *              an hexadecimal digit character.
+ */
+PJ_INLINE(int) pj_isxdigit(unsigned char c){ return isxdigit(c); }
+
+/**
+ * Array of hex digits, in lowerspace.
+ */
+/*extern char pj_hex_digits[];*/
+#define pj_hex_digits	"0123456789abcdef"
+
+/**
+ * Convert a value to hex representation.
+ * @param value	    Integral value to convert.
+ * @param p	    Buffer to hold the hex representation, which must be
+ *		    at least two bytes length.
+ */
+PJ_INLINE(void) pj_val_to_hex_digit(unsigned value, char *p)
+{
+    *p++ = pj_hex_digits[ (value & 0xF0) >> 4 ];
+    *p   = pj_hex_digits[ (value & 0x0F) ];
+}
+
+/**
+ * Convert hex digit c to integral value.
+ * @param c	The hex digit character.
+ * @return	The integral value between 0 and 15.
+ */
+PJ_INLINE(unsigned) pj_hex_digit_to_val(unsigned char c)
+{
+    if (c <= '9')
+	return (c-'0') & 0x0F;
+    else if (c <= 'F')
+	return  (c-'A'+10) & 0x0F;
+    else
+	return (c-'a'+10) & 0x0F;
+}
+
+/** @} */
+
+PJ_END_DECL
+
+#endif	/* __PJ_CTYPE_H__ */
+