update rsp-low comments

[deliverable/binutils-gdb.git] / gdb / common / rsp-low.h

diff --git a/gdb/common/rsp-low.h b/gdb/common/rsp-low.h
index e1944cf92a8f6b75621a529a99c7c2538752df55..31162c69776393892ab0097d8be04e4d8caaf1ac 100644 (file)
--- a/gdb/common/rsp-low.h
+++ b/gdb/common/rsp-low.h
@@ -28,17 +28,34 @@ extern int fromhex (int a);
 
 extern int tohex (int nib);
 
+/* Write a character representing the low order four bits of NIBBLE in
+   hex to *BUF.  Returns BUF+1.  */
+
 extern char *pack_nibble (char *buf, int nibble);
 
+/* Write the low byte of BYTE in hex to *BUF.  Returns BUF+2.  */
+
 extern char *pack_hex_byte (char *pkt, int byte);
 
+/* Read hex digits from BUFF and convert to a number, which is stored
+   in RESULT.  Reads until a non-hex digit is seen.  Returns a pointer
+   to the terminating character.  */
+
 extern char *unpack_varlen_hex (char *buff, ULONGEST *result);
 
-extern int hex2bin (const char *hex, gdb_byte *bin, int count);
+/* HEX is a string of characters representing hexadecimal digits.
+   Convert pairs of hex digits to bytes and store sequentially into
+   BIN.  COUNT is the maximum number of characters to convert.  This
+   will convert fewer characters if the number of hex characters
+   actually seen is odd, or if HEX terminates before COUNT characters.
+   Returns the number of characters actually converted.  */
 
-extern int unhexify (char *bin, const char *hex, int count);
+extern int hex2bin (const char *hex, gdb_byte *bin, int count);
 
-extern void convert_ascii_to_int (const char *from, unsigned char *to, int n);
+/* Convert some bytes to a hexadecimal representation.  BIN holds the
+   bytes to convert.  COUNT says how many bytes to convert.  The
+   resulting characters are stored in HEX, followed by a NUL
+   character.  Returns the number of bytes actually converted.  */
 
 extern int bin2hex (const gdb_byte *bin, char *hex, int count);