All the distribution functions, though they're untested.

[pspp] / src / libpspp / str.c

diff --git a/src/libpspp/str.c b/src/libpspp/str.c
index 99602fba681e699146f2ddb4922b2e90ac1caadc..b40cb4b4ab8f07ac662965e70ae88adebfea90d0 100644 (file)
--- a/src/libpspp/str.c
+++ b/src/libpspp/str.c
@@ -26,6 +26,7 @@
 #include <unistr.h>
 
 #include "libpspp/cast.h"
+#include "libpspp/i18n.h"
 #include "libpspp/message.h"
 #include "libpspp/pool.h"
 
@@ -425,6 +426,15 @@ ss_dealloc (struct substring *ss)
   free (ss->string);
 }
 
+/* Exchanges the contents of A and B. */
+void
+ss_swap (struct substring *a, struct substring *b)
+{
+  struct substring tmp = *a;
+  *a = *b;
+  *b = tmp;
+}
+
 /* Truncates SS to at most CNT bytes in length. */
 void
 ss_truncate (struct substring *ss, size_t cnt)
@@ -919,6 +929,22 @@ ss_at_mblen (struct substring s, size_t ofs)
   else
     return 0;
 }
+
+size_t
+ss_utf8_count_columns (struct substring s)
+{
+  return utf8_count_columns (s.string, s.length);
+}
+
+/* Returns a substring of S starting at 0-based display column START and
+   running for N display columns. */
+struct substring
+ss_utf8_columns (struct substring s, size_t start, size_t n)
+{
+  ss_advance (&s, utf8_columns_to_bytes (s.string, s.length, start));
+  s.length = utf8_columns_to_bytes (s.string, s.length, n);
+  return s;
+}
 \f
 /* Initializes ST as an empty string. */
 void