hex conversion bug fix.

fmt/fmt_xlong.c

@@ -1,7 +1,7 @@
 #include "fmt.h"
 
 static inline char tohex(char c) {
-  return c>10?c-10+'a':c+'0';
+  return c>=10?c-10+'a':c+'0';
 }
 
 unsigned int fmt_xlong(char *dest,unsigned long i) {

socket/fmt_ip6_flat.c

@@ -1,12 +1,7 @@
 #include "ip6.h"
 
-static char tohex(char num) {
-  if (num<10)
-    return num+'0';
-  else if (num<16)
-    return num-10+'a';
-  else
-    return -1;
+static inline char tohex(char c) {
+  return c>=10?c-10+'a':c+'0';
 }
 
 unsigned int fmt_ip6_flat(char *s,const char ip[16])

t.c

@@ -20,11 +20,13 @@ int main(int argc,char* argv[]) {
   buffer_flush(buffer_1small);
 #endif
 
+  buf[fmt_xlong(buf,0)]=0;
+  puts(buf);
   rdtscl(a);
   c=str_len(buf);
   rdtscl(b);
   /*byte_zero_djb(buf,j); */
-  printf("\n%lu %d\n",b-a,c);
+//  printf("\n%lu %d\n",b-a,c);
 #if 0
   buffer_puts(buffer_1small,"hello, world\n");
   buffer_flush(buffer_1small);