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-rw-r--r--glcdgraphics/common.c68
1 files changed, 66 insertions, 2 deletions
diff --git a/glcdgraphics/common.c b/glcdgraphics/common.c
index 8942424..0fd78b8 100644
--- a/glcdgraphics/common.c
+++ b/glcdgraphics/common.c
@@ -6,10 +6,12 @@
* This file is released under the GNU General Public License. Refer
* to the COPYING file distributed with this package.
*
- * (c) 2004 Andreas Regel <andreas.regel AT powarman.de>
+ * (c) 2004 Andreas Regel <andreas.regel AT powarman.de>
+ * (c) 2010-2012 Wolfgang Astleitner <mrwastl AT users sourceforge net>
*/
#include <ctype.h>
+#include <syslog.h>
#include "common.h"
@@ -48,7 +50,7 @@ std::string trim(const std::string & s)
start++;
}
end = s.length() - 1;
- while (end >= 0)
+ while (end > start)
{
if (!isspace(s[end]))
break;
@@ -57,4 +59,66 @@ std::string trim(const std::string & s)
return s.substr(start, end - start + 1);
}
+
+bool encodedCharAdjustCounter(const bool isutf8, const std::string & str, uint32_t & c, unsigned int & i, const uint32_t errChar)
+{
+ bool rv = false;
+
+ if (i >= str.length())
+ return rv;
+
+ if ( isutf8 ) {
+ uint8_t c0,c1,c2,c3;
+ c = str[i];
+ c0 = str[i];
+ c1 = (i+1 < str.length()) ? str[i+1] : 0;
+ c2 = (i+2 < str.length()) ? str[i+2] : 0;
+ c3 = (i+3 < str.length()) ? str[i+3] : 0;
+
+ if ( (c0 & 0x80) == 0x00) {
+ // one byte: 0xxxxxxx
+ c = c0;
+ rv = true;
+ } else if ( (c0 & 0xE0) == 0xC0 ) {
+ // two byte utf8: 110yyyyy 10xxxxxx -> 00000yyy yyxxxxxx
+ if ( (c1 & 0xC0) == 0x80 ) {
+ c = ( (c0 & 0x1F) << 6 ) | ( (c1 & 0x3F) );
+ rv = true;
+ } else {
+ //syslog(LOG_INFO, "GraphLCD: illegal 2-byte UTF-8 sequence found: %02x %02x, pos=%d, str: %s\n", c0,c1,i,str.c_str());
+ c = errChar;
+ }
+ i += 1;
+ } else if ( (c0 & 0xF0) == 0xE0 ) {
+ // three byte utf8: 1110zzzz 10yyyyyy 10xxxxxx -> zzzzyyyy yyxxxxxx
+ if ( ((c1 & 0xC0) == 0x80) && ((c2 & 0xC0) == 0x80) ) {
+ c = ( (c0 & 0x0F) << 12 ) | ( (c1 & 0x3F) << 6 ) | ( c2 & 0x3F );
+ rv = true;
+ } else {
+ //syslog(LOG_INFO, "GraphLCD: illegal 3-byte UTF-8 sequence found: %02x %02x %02x, pos=%d, str: %s\n", c0,c1,c2,i,str.c_str());
+ c = errChar;
+ }
+ i += 2;
+ } else if ( (c0 & 0xF8) == 0xF0 ) {
+ // four byte utf8: 11110www 10zzzzzz 10yyyyyy 10xxxxxx -> 000wwwzz zzzzyyyy yyxxxxxx
+ if ( ((c1 & 0xC0) == 0x80) && ((c2 & 0xC0) == 0x80) && ((c3 & 0xC0) == 0x80) ) {
+ c = ( (c0 & 0x07) << 18 ) | ( (c1 & 0x3F) << 12 ) | ( (c2 & 0x3F) << 6 ) | (c3 & 0x3F);
+ rv = true;
+ } else {
+ //syslog(LOG_INFO, "GraphLCD: illegal 4-byte UTF-8 sequence found: %02x %02x %02x %02x, pos=%d, str: %s\n", c0,c1,c2,c3,i,str.c_str());
+ c = errChar;
+ }
+ i += 3;
+ } else {
+ // 1xxxxxxx is invalid!
+ //syslog(LOG_INFO, "GraphLCD: illegal 1-byte UTF-8 char found: %02x, pos=%d, str: %s\n", c0,i,str.c_str());
+ c = errChar;
+ }
+ } else {
+ c = str[i];
+ rv = true;
+ }
+ return rv;
+}
+
} // end of namespace