X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=error.h;h=4a885ec9e4b7078d43cd3cdb67507a1a0a39b754;hp=4bc9f1555e274049d041e2895d31c1263469845f;hb=36df09fbcf3f6e80cc0990bad92ec16a0d1b2a00;hpb=f0380a05616524b149fa34f4a0873d9063ca2a95

diff --git a/error.h b/error.h
index 4bc9f155..4a885ec9 100644
--- a/error.h
+++ b/error.h
@@ -446,27 +446,48 @@ extern const char **para_errlist[];
  */
 #define ERRNUM_TO_INDEX(num) (((1 << SS_SHIFT) - 1) & (num))
 
+/**
+ * This bit indicates whether a number is considered a system error number
+ * If yes, the system errno is just the result of clearing this bit from
+ * the given number.
+ */
 #define SYSTEM_ERROR_BIT 30
 
+/** Check whether the system error bit is set. */
 #define IS_SYSTEM_ERROR(num) (!!((num) & (1 << SYSTEM_ERROR_BIT)))
 
+/** Set the system error bit for the given number. */
 #define ERRNO_TO_PARA_ERROR(num) ((num) | (1 << SYSTEM_ERROR_BIT))
 
-static inline int is_errno(int val, int _errno)
+/** Check whether a given number is a system error number.
+ *
+ * \param num The value to be checked.
+ * \param _errno The system error number.
+ *
+ * \return True if \a num is paraslash's representation of the system
+ * error identified by \a _errno.
+ */
+_static_inline_ int is_errno(int num, int _errno)
 {
-	assert(val > 0 && _errno > 0);
-	return ERRNO_TO_PARA_ERROR(_errno) == val;
+	assert(num > 0 && _errno > 0);
+	return ERRNO_TO_PARA_ERROR(_errno) == num;
 }
 
 /**
  * Paraslash's version of strerror(3).
  *
- * Expands to the error text of \a num (a string constant).
+ * \param num The error number.
+ *
+ * \return The error text of \a num.
  */
-#define PARA_STRERROR(num) IS_SYSTEM_ERROR(num)? \
-	strerror((num) & ((1 << SYSTEM_ERROR_BIT) - 1)) : \
-	para_errlist[ERRNUM_TO_SS(num)] [ERRNUM_TO_INDEX(num)]
-
+_static_inline_ const char *para_strerror(int num)
+{
+	assert(num > 0);
+	if (IS_SYSTEM_ERROR(num))
+		return strerror((num) & ((1 << SYSTEM_ERROR_BIT) - 1));
+	else
+		return para_errlist[ERRNUM_TO_SS(num)][ERRNUM_TO_INDEX(num)];
+}
 /**
  * Define the error list for one subsystem.
  #