Changeset 62 for pjproject/trunk/pjlib/include/pj/ctype.h

Timestamp:

Nov 20, 2005 7:55:42 PM (18 years ago)

Author:

bennylp

Message:

Added hex character conversion utility in ctype

File:

• pjproject/trunk/pjlib/include/pj/ctype.h (modified) (3 diffs)

pjproject/trunk/pjlib/include/pj/ctype.h

@@ -25 +25 @@
  */
 
+#include <pj/types.h>
 #include <pj/compat/ctype.h>
+
+PJ_BEGIN_DECL
 
 /**
@@ -100 +103 @@
 
 /**
- * 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(int c){ return isxdigit(c); }
-
-/**
  * Returns a non-zero value if c is a either a space (' ') or horizontal
  * tab ('\\t') character.
@@ -131 +125 @@
 PJ_INLINE(int) pj_toupper(int 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(int c){ return isxdigit(c); }
+
+/**
+ * Array of hex digits, in lowerspace.
+ */
+extern char pj_hex_digits[];
+
+/**
+ * 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 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__ */