X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fsrc%2Fstring.c;h=e169a9f057076ff42995949f7b87f76ee2f9eff6;hb=5a886ce7f82d5add6fdbf17a6ed698f13abb748d;hp=f4e44cabb6023d30ec3f2d9ac0f7d247d4270552;hpb=00ba27c5ad34cee612cb8fdf1ee69f414ed2fb36;p=user%2Fhenk%2Fcode%2Fexim.git

diff --git a/src/src/string.c b/src/src/string.c
index f4e44cabb..e169a9f05 100644
--- a/src/src/string.c
+++ b/src/src/string.c
@@ -224,13 +224,13 @@ Returns:   the value of the character escape
 */
 
 int
-string_interpret_escape(uschar **pp)
+string_interpret_escape(const uschar **pp)
 {
 #ifdef COMPILE_UTILITY
 const uschar *hex_digits= CUS"0123456789abcdef";
 #endif
 int ch;
-uschar *p = *pp;
+const uschar *p = *pp;
 ch = *(++p);
 if (isdigit(ch) && ch != '8' && ch != '9')
   {
@@ -284,12 +284,12 @@ Arguments:
 Returns:        string with non-printers encoded as printing sequences
 */
 
-uschar *
-string_printing2(uschar *s, BOOL allow_tab)
+const uschar *
+string_printing2(const uschar *s, BOOL allow_tab)
 {
 int nonprintcount = 0;
 int length = 0;
-uschar *t = s;
+const uschar *t = s;
 uschar *ss, *tt;
 
 while (*t != 0)
@@ -374,7 +374,7 @@ while (*p)
   {
   if (*p == '\\')
     {
-    *q++ = string_interpret_escape(&p);
+    *q++ = string_interpret_escape((const uschar **)&p);
     p++;
     }
   else
@@ -437,7 +437,7 @@ Returns:  copy of string in new store
 */
 
 uschar *
-string_copy_malloc(uschar *s)
+string_copy_malloc(const uschar *s)
 {
 int len = Ustrlen(s) + 1;
 uschar *ss = store_malloc(len);
@@ -639,9 +639,9 @@ Returns:   the new string
 */
 
 uschar *
-string_dequote(uschar **sptr)
+string_dequote(const uschar **sptr)
 {
-uschar *s = *sptr;
+const uschar *s = *sptr;
 uschar *t, *yield;
 
 /* First find the end of the string */
@@ -868,10 +868,10 @@ Returns:     pointer to buffer, containing the next substring,
 */
 
 uschar *
-string_nextinlist(uschar **listptr, int *separator, uschar *buffer, int buflen)
+string_nextinlist(const uschar **listptr, int *separator, uschar *buffer, int buflen)
 {
-register int sep = *separator;
-register uschar *s = *listptr;
+int sep = *separator;
+const uschar *s = *listptr;
 BOOL sep_is_special;
 
 if (s == NULL) return NULL;
@@ -928,7 +928,7 @@ else
   {
   int size = 0;
   int ptr = 0;
-  uschar *ss;
+  const uschar *ss;
 
   /* We know that *s != 0 at this point. However, it might be pointing to a
   separator, which could indicate an empty string, or (if an ispunct()
@@ -1013,12 +1013,17 @@ return new;
 static const uschar *
 Ustrnchr(const uschar * s, int c, unsigned * len)
 {
-while (*len)
+unsigned siz = *len;
+while (siz)
   {
   if (!*s) return NULL;
-  if (*s == c) return s;
+  if (*s == c)
+    {
+    *len = siz;
+    return s;
+    }
   s++;
-  *len--;
+  siz--;
   }
 return NULL;
 }