X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Flibpspp%2Fstr.c;h=3c094902509426266cf97eb1caef393dc976451f;hb=8b4ecb31c06866aae734a8a4fa2201e5d333181d;hp=99602fba681e699146f2ddb4922b2e90ac1caadc;hpb=0408dbc8812c0bc845f55934a7e7f9fb74b3c4aa;p=pspp

diff --git a/src/libpspp/str.c b/src/libpspp/str.c
index 99602fba68..3c09490250 100644
--- 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"
 
@@ -143,9 +144,9 @@ buf_copy_str_lpad (char *dst, size_t dst_size, const char *src, char pad)
     memcpy (dst, src, dst_size);
   else
     {
-      size_t pad_cnt = dst_size - src_len;
-      memset (&dst[0], pad, pad_cnt);
-      memcpy (dst + pad_cnt, src, src_len);
+      size_t n_pad = dst_size - src_len;
+      memset (&dst[0], pad, n_pad);
+      memcpy (dst + n_pad, src, src_len);
     }
 }
 
@@ -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;
+}
 
 /* Initializes ST as an empty string. */
 void