Use restrict on pointers where it makes sense. (requires C99 support,

which we already assume)

src/dstr.c

@@ -106,7 +106,7 @@ char *uc_dstr_put(struct DStr *str, size_t len)
     return start;
 }
 
-size_t uc_dstr_put_str_filter(struct DStr *str, const char *s, int (*is_x)(int c))
+size_t uc_dstr_put_str_filter(struct DStr *str, const char *restrict s, int (*is_x)(int c))
 {
     size_t len = strlen(s);
     size_t i;
@@ -128,7 +128,7 @@ size_t uc_dstr_put_str_filter(struct DStr *str, const char *s, int (*is_x)(int c
     return idx;
 }
 
-int uc_dstr_put_str_sz(struct DStr *str, const char *s, size_t len)
+int uc_dstr_put_str_sz(struct DStr *str, const char *restrict s, size_t len)
 {
     char *start = uc_dstr_put(str, len);
 
@@ -140,7 +140,7 @@ int uc_dstr_put_str_sz(struct DStr *str, const char *s, size_t len)
     return 0;
 }
 
-int uc_dstr_put_str(struct DStr *str, const char *s)
+int uc_dstr_put_str(struct DStr *str, const char *restrict s)
 {
     size_t len = strlen(s);
 
@@ -159,7 +159,7 @@ int uc_dstr_put_char(struct DStr *str, char c)
     return 0;
 }
 
-void uc_dstr_own(struct DStr *str, char *s)
+void uc_dstr_own(struct DStr *str, char *restrict s)
 {
     size_t len = strlen(s);
 
@@ -181,7 +181,7 @@ char *uc_dstr_steal(struct DStr *str)
     return s;
 }
 
-void uc_str_swap(struct DStr *a, struct DStr *b)
+void uc_str_swap(struct DStr *restrict a, struct DStr *restrict b)
 {
     struct DStr tmp;
 
@@ -236,7 +236,7 @@ void uc_dstr_trim(struct DStr *str)
     }
 }
 
-int uc_dstr_sprintf(struct DStr *str, const char *fmt, ...)
+int uc_dstr_sprintf(struct DStr *str, const char *restrict fmt, ...)
 {
     va_list ap;
     int rc;
@@ -248,7 +248,7 @@ int uc_dstr_sprintf(struct DStr *str, const char *fmt, ...)
     return rc;
 }
 
-int uc_dstr_vsprintf(struct DStr *str, const char *fmt, va_list ap_)
+int uc_dstr_vsprintf(struct DStr *str, const char *restrict fmt, va_list ap_)
 {
     va_list ap;
     int rc;