From 7f5851d906449063c6cc653e7967549e861a2fea Mon Sep 17 00:00:00 2001
From: "Eric S. Raymond" <esr@thyrsus.com>
Date: Wed, 20 Jun 2012 09:00:33 -0400
Subject: Split gpsd_hexdump() so AIS dumping will be invertible.

---
 hex.c | 47 ++++++++++++++++++++++++++---------------------
 1 file changed, 26 insertions(+), 21 deletions(-)

(limited to 'hex.c')

diff --git a/hex.c b/hex.c
index ef67f06b..c4130a66 100644
--- a/hex.c
+++ b/hex.c
@@ -8,7 +8,7 @@
 
 #include "gpsd.h"
 
-const char /*@ observer @*/ *gpsd_hexdump(char *binbuf, size_t binbuflen)
+const char /*@ observer @*/ *gpsd_packetdump(char *binbuf, size_t binbuflen)
 {
     char *cp;
     bool printable = true;
@@ -19,31 +19,36 @@ const char /*@ observer @*/ *gpsd_hexdump(char *binbuf, size_t binbuflen)
 	    printable = false;
     if (printable)
 	return binbuf;
-    else {
-	static char hexbuf[MAX_PACKET_LENGTH * 2 + 1];
+    else
+	return gpsd_hexdump(binbuf, binbuflen);
+}
+
+const char /*@ observer @*/ *gpsd_hexdump(char *binbuf, size_t binbuflen)
+{
+    /* FIXME: this isn't thead-safe! */
+    static char hexbuf[MAX_PACKET_LENGTH * 2 + 1];
 #ifndef SQUELCH_ENABLE
-	size_t i, j = 0;
-	size_t len =
-	    (size_t) ((binbuflen >
-		       MAX_PACKET_LENGTH) ? MAX_PACKET_LENGTH : binbuflen);
-	const char *ibuf = (const char *)binbuf;
-	const char *hexchar = "0123456789abcdef";
+    size_t i, j = 0;
+    size_t len =
+	(size_t) ((binbuflen >
+		   MAX_PACKET_LENGTH) ? MAX_PACKET_LENGTH : binbuflen);
+    const char *ibuf = (const char *)binbuf;
+    const char *hexchar = "0123456789abcdef";
 
-	if (NULL == binbuf || 0 == binbuflen)
-	    return "";
+    if (NULL == binbuf || 0 == binbuflen)
+	return "";
 
-	/*@ -shiftimplementation @*/
-	for (i = 0; i < len; i++) {
-	    hexbuf[j++] = hexchar[(ibuf[i] & 0xf0) >> 4];
-	    hexbuf[j++] = hexchar[ibuf[i] & 0x0f];
-	}
-	/*@ +shiftimplementation @*/
-	hexbuf[j] = '\0';
+    /*@ -shiftimplementation @*/
+    for (i = 0; i < len; i++) {
+	hexbuf[j++] = hexchar[(ibuf[i] & 0xf0) >> 4];
+	hexbuf[j++] = hexchar[ibuf[i] & 0x0f];
+    }
+    /*@ +shiftimplementation @*/
+    hexbuf[j] = '\0';
 #else /* SQUELCH defined */
-	hexbuf[0] = '\0';
+    hexbuf[0] = '\0';
 #endif /* SQUELCH_ENABLE */
-	return hexbuf;
-    }
+    return hexbuf;
 }
 
 /*@ +charint -shiftimplementation @*/
-- 
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