Import backup from 2005-01-31

kernel/lang/lang.c

@@ -44,6 +44,25 @@ int	strncmp(char *str1, char *str2, int n)
 }
 
 
+/* str_change changes a certain character in a string
+ *  to a different character
+ * Returns: how many characters were changed
+ */
+int str_change(char *str, char ch1, char ch2)
+{
+  int count = 0;
+  while (*str)
+    {
+      if (*str == ch1)
+	{
+	  *str = ch2;
+	  count++;
+	}
+      str++;
+    }
+  return count;
+}
+
 // counts the occurrences of lookfor in str
 int	str_count(char *str, char lookfor)
 {
@@ -60,6 +79,8 @@ int	str_count(char *str, char lookfor)
 // split the string into substrings by the splitchar, return number of substrings
 int	str_split(char *str, char splitchar)
 {
+  if (!(*str))
+    return 0;
 	int subs = 1;
 	while (*str)
 	{

kernel/lang/lang.h

@@ -29,6 +29,7 @@ void invlpg_(u32_t addr);
 /* lang.c */
 int	strcmp(char *str1, char *str2);
 int	strncmp(char *str1, char *str2, int n);
+int	str_change(char *str, char ch1, char ch2);
 int	str_count(char *str, char lookfor);
 int	str_split(char *str, char splitchar);
 char	*str_advance(char *str);