can-utils/lib: fix build issues introduced with sprintf_can_error_frame()

[sojka/can-utils.git] / lib.h

diff --git a/lib.h b/lib.h
index 80dbf457f4bf2626b258b7a47927b884633d0ad7..7a9d5f19010f93f53f3a4c418079104f4ef4be20 100644 (file)
--- a/lib.h
+++ b/lib.h
@@ -45,6 +45,34 @@
  *
  */
 
+unsigned char asc2nibble(char c);
+/*
+ * Returns the decimal value of a given ASCII hex character.
+ *
+ * While 0..9, a..f, A..F are valid ASCII hex characters.
+ * On invalid characters the value 16 is returned for error handling.
+ */
+
+int hexstring2candata(char *arg, struct can_frame *cf);
+/*
+ * Converts a given ASCII hex string to values in the can_frame data[].
+ *
+ * A valid ASCII hex string consists of an even number of up to 16 chars.
+ * Leading zeros '00' in the ASCII hex string are interpreted.
+ *
+ * Examples:
+ *
+ * "1234"   => data[0] = 0x12, data[1] = 0x34
+ * "001234" => data[0] = 0x00, data[1] = 0x12, data[2] = 0x34
+ *
+ * Return values:
+ * 0 = success
+ * 1 = error (in length or the given characters are no ASCII hex characters)
+ *
+ * Remark: The not written data[] elements remain unchanged.
+ *
+ */
+
 int parse_canframe(char *cs, struct can_frame *cf);
 /*
  * Transfers a valid ASCII string decribing a CAN frame into struct can_frame.
@@ -59,7 +87,7 @@ int parse_canframe(char *cs, struct can_frame *cf);
  * Examples:
  *
  * 123# -> standard CAN-Id = 0x123, dlc = 0
- * 12345678# -> exended CAN-Id = 0x12345678, dlc = 0
+ * 12345678# -> extended CAN-Id = 0x12345678, dlc = 0
  * 123#R -> standard CAN-Id = 0x123, dlc = 0, RTR-frame
  * 7A1#r -> standard CAN-Id = 0x7A1, dlc = 0, RTR-frame
  *
@@ -98,6 +126,10 @@ void sprint_canframe(char *buf , struct can_frame *cf, int sep);
 
 #define CANLIB_VIEW_ASCII      0x1
 #define CANLIB_VIEW_BINARY     0x2
+#define CANLIB_VIEW_SWAP       0x4
+#define CANLIB_VIEW_ERROR      0x8
+
+#define SWAP_DELIMITER '`'
 
 void fprint_long_canframe(FILE *stream , struct can_frame *cf, char *eol, int view);
 void sprint_long_canframe(char *buf , struct can_frame *cf, int view);
@@ -115,3 +147,9 @@ void sprint_long_canframe(char *buf , struct can_frame *cf, int view);
  * fprint_long_canframe(stderr, &frame, NULL, 0); // no eol to STDERR
  *
  */
+
+void snprintf_can_error_frame(char *buf, size_t len, struct can_frame *cf,
+                             char *sep);
+/*
+ * Creates a CAN error frame output in user readable format.
+ */