fix uhub_itoa() and uhub_ulltoa()

src/system.h

@@ -73,6 +73,7 @@
 #include <time.h>
 
 #if !defined(WIN32)
+#include <inttypes.h>
 #include <unistd.h>
 #include <grp.h>
 #include <pwd.h>

src/util/misc.c

@@ -303,47 +303,19 @@ int is_number(const char* value, int* num)
 }
 
 
-/*
- * FIXME: -INTMIN is wrong!
- */
 const char* uhub_itoa(int val)
 {
-	size_t i;
-	int value;
 	static char buf[22];
-	memset(buf, 0, sizeof(buf));
-	if (!val)
-	{
-		buf[0] = '0';
-		buf[1] = '\0';
-		return buf;
-	}
-	i = sizeof(buf) - 1;
-	for (value = abs(val); value && i > 0; value /= 10)
-		buf[--i] = "0123456789"[value % 10];
 
-	if (val < 0 && i > 0)
+	return snprintf(buf, sizeof(buf), "%d", val) < 0 ? NULL : buf;
-		buf[--i] = '-';
-	return buf+i;
 }
 
 
 const char* uhub_ulltoa(uint64_t val)
 {
-	size_t i;
+	static char buf[22];
-	static char buf[22] = { 0, };
+
-	memset(buf, 0, sizeof(buf));
+	return snprintf(buf, sizeof(buf), "%"PRIu64, val) < 0 ? NULL : buf;
-	
-	if (!val)
-	{
-		buf[0] = '0';
-		buf[1] = '\0';
-		return buf;
-	}
-	i = sizeof(buf) - 1;
-	for (; val && i > 0; val /= 10)
-		buf[--i] = "0123456789"[val % 10];
-	return buf+i;
 }
 
 

src/util/misc.h

@@ -53,7 +53,11 @@ extern int file_read_lines(const char* file, void* data, file_line_handler_t han
  */
 extern int string_to_boolean(const char* str, int* boolean);
 
-
+/**
+ * Convert number to string.
+ * Note: these functions are neither thread-safe nor reentrant.
+ * @return pointer to the resulting string, NULL on error
+ */
 extern const char* uhub_itoa(int val);
 extern const char* uhub_ulltoa(uint64_t val);