Bug in TDES fixed

[avr-crypto-lib.git] / string-extras.h

diff --git a/string-extras.h b/string-extras.h
index 457f9a7123d2e0dc7573d10bb3e60c3e1bd0d0e7..bf2cbf7fe0019e00d1484181a652381d4f320b49 100644 (file)
--- a/string-extras.h
+++ b/string-extras.h
@@ -1,4 +1,4 @@
-/* string_extras.h */
+/* string-extras.h */
 /*
     This file is part of the AVR-Crypto-Lib.
     Copyright (C) 2008  Daniel Otte (daniel.otte@rub.de)
@@ -17,13 +17,39 @@
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 /**
- * \file       string_extras.h
+ * \file       string-extras.h
  * \author  Daniel Otte 
  * \date    2006-05-16
  * \license    GPLv3 or later
  * 
  */
 
+/** \fn stridentcnt_P(char* a, PGM_P b)
+ * \brief counts the number of identic chars
+ * 
+ * This function compares the supplyed strings and returns the index of the 
+ * first char where the strings differ.
+ * \param a pointer to string in RAM
+ * \param b pointer to string in Flash
+ * \return index of the first char where \c a and \c b differ
+ */
 uint16_t stridentcnt_P(char* a, PGM_P b);
+
+/** \fn firstword_length(char* s)
+ * \brief compute the length of the first word in supllyed string
+ * 
+ * This function searches for the first whitespace in the string and returns the
+ * number of chars before the first whitespace.
+ * \param s string
+ * \return number of chars in first word
+ */
 uint16_t firstword_length(char* s);
-char* strstrip(char*);
+
+/** \fn strstrip(char* str)
+ * \brief removes whitespace at the beginning and the end of a string
+ * 
+ * This function removes whitespaces at the end of a string.
+ * \param str sting
+ * \return pointer to the first non-whitespace char in string
+ */
+char* strstrip(char* str);