From 1d513f05bae4ba8a3ff5d609806be9161b1b9d73 Mon Sep 17 00:00:00 2001
From: parkrrrr <parkrrrr@f51c46e8-681c-474f-0cfe-069cfd0219fb>
Date: Fri, 16 Apr 2004 15:37:30 +0000
Subject: [PATCH] Add 'encrypt' option to text, html outputs to keep the hint
 at least a little secret.

---
 gpsbabel/defs.h |  2 ++
 gpsbabel/html.c | 11 ++++++++++-
 gpsbabel/text.c | 11 ++++++++++-
 gpsbabel/util.c | 24 +++++++++++++++++++++++-
 4 files changed, 45 insertions(+), 3 deletions(-)

diff --git a/gpsbabel/defs.h b/gpsbabel/defs.h
index d08d71146..50e540fe8 100644
--- a/gpsbabel/defs.h
+++ b/gpsbabel/defs.h
@@ -422,6 +422,8 @@ char * strip_nastyhtml(const char * in);
 char * str_utf8_to_cp1252( const char * str );
 char * str_utf8_to_ascii( const char * str );
 
+char * rot13( const char *str );
+
 /*
  * PalmOS records like fixed-point numbers, which should be rounded
  * to deal with possible floating-point representation errors.
diff --git a/gpsbabel/html.c b/gpsbabel/html.c
index 8a128bb5c..8b32e5448 100644
--- a/gpsbabel/html.c
+++ b/gpsbabel/html.c
@@ -28,6 +28,7 @@ static FILE *file_out;
 static void *mkshort_handle;
 
 static char *stylesheet = NULL;
+static char *encrypt = NULL;
 
 #define MYNAME "HTML"
 
@@ -35,6 +36,8 @@ static
 arglist_t html_args[] = {
 	{ "stylesheet", &stylesheet, 
 		"Path to HTML style sheet", ARGTYPE_STRING },
+	{ "encrypt", &encrypt,
+		"Encrypt hints using ROT13", ARGTYPE_BOOL },
 	{0, 0, 0, 0}
 };
 
@@ -104,7 +107,13 @@ html_disp(const waypoint *wpt)
 			fprintf (file_out, "<p class=\"desclong\">%s</p>\n", strip_nastyhtml(wpt->gc_data.desc_long.utfstring));
        		}
 		if (wpt->gc_data.hint) {
-			fprintf (file_out, "<p class=\"hint\"><strong>Hint:</strong> %s</p>\n", wpt->gc_data.hint);
+			char *hint = NULL;
+			if ( encrypt )
+				hint = rot13( wpt->gc_data.hint );
+			else 
+				hint = xstrdup( wpt->gc_data.hint );
+			fprintf (file_out, "<p class=\"hint\"><strong>Hint:</strong> %s</p>\n", hint);
+			xfree( hint );
 		}
 	}
 	else if (strcmp(wpt->notes,wpt->description)) {
diff --git a/gpsbabel/text.c b/gpsbabel/text.c
index cebd5a835..180a9b977 100644
--- a/gpsbabel/text.c
+++ b/gpsbabel/text.c
@@ -28,6 +28,7 @@ static FILE *file_out;
 static void *mkshort_handle;
 
 static char *suppresssep = NULL;
+static char *encrypt = NULL;
 
 #define MYNAME "TEXT"
 
@@ -35,6 +36,8 @@ static
 arglist_t text_args[] = {
 	{ "nosep", &suppresssep, 
 		"Suppress separator lines between waypoints", ARGTYPE_BOOL },
+	{ "encrypt", &encrypt,
+		"Encrypt hints using ROT13", ARGTYPE_BOOL },
 	{0, 0, 0, 0}
 };
 
@@ -97,7 +100,13 @@ text_disp(const waypoint *wpt)
                 	xfree(stripped_html);
        		}
 		if (wpt->gc_data.hint) {
-			fprintf (file_out, "\nHint: %s\n", wpt->gc_data.hint);
+			char *hint = NULL;
+			if ( encrypt ) 
+				hint = rot13( wpt->gc_data.hint );
+			else
+				hint = xstrdup( wpt->gc_data.hint );
+			fprintf (file_out, "\nHint: %s\n", hint);
+			xfree( hint );
 		}
 	}
 	else if (strcmp(wpt->notes,wpt->description)) {
diff --git a/gpsbabel/util.c b/gpsbabel/util.c
index 010684d8a..0d3505c9f 100644
--- a/gpsbabel/util.c
+++ b/gpsbabel/util.c
@@ -628,7 +628,29 @@ strsub(char *s, char *search, char *replace)
        strcat(d, p + slen);
        return d;
 }
-			
+
+char *
+rot13( const char *s )
+{
+	char *result = xstrdup( s );
+	char *cur = result;
+	int flip = 1;
+	while (cur && *cur ) {
+		if ( flip ) {
+			if (*cur == '[') flip = 0;
+			else if ( *cur >= 'A' && *cur <= 'Z' ) {
+				*cur = 'A' + ((*cur-'A')+13)%26;
+			}
+			else if ( *cur >= 'a' && *cur <= 'z' ) {
+				*cur = 'a' + ((*cur-'a')+13)%26;
+			}
+		}
+		else if ( *cur == ']' ) flip = 1;
+		cur++;
+	}
+	return result;
+}
+
 void utf8_to_int( const char *cp, int *bytes, int *value ) 
 {
 	if ( (*cp & 0xe0) == 0xc0 ) {
-- 
2.30.2