1 files changed, 124 insertions, 0 deletions
diff --git a/libmailutils/base/coord.c b/libmailutils/base/coord.c
new file mode 100644
index 000000000..535cc6fac
--- /dev/null
+++ b/libmailutils/base/coord.c
@@ -0,0 +1,124 @@
+/* GNU Mailutils -- a suite of utilities for electronic mail
+   Copyright (C) 2020-2024 Free Software Foundation, Inc.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 3 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General
+   Public License along with this library.  If not, see 
+   <http://www.gnu.org/licenses/>. */
+
+/*
+ * Functions for dealing with message part coordinates.
+ */
+
+#include <config.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <mailutils/message.h>
+
+int
+mu_coord_alloc (mu_coord_t *ptr, size_t n)
+{
+  mu_coord_t p = calloc (n + 1, sizeof (p[0]));
+  if (!p)
+    return errno;
+  p[0] = n;
+  *ptr = p;
+  return 0;
+}
+
+int
+mu_coord_realloc (mu_coord_t *ptr, size_t n)
+{
+  if (!ptr)
+    return EINVAL;
+  if (!*ptr)
+    return mu_coord_alloc (ptr, n);
+  else
+    {
+      size_t i = mu_coord_length (*ptr);
+      if (i != n)
+	{
+	  mu_coord_t nc = realloc (*ptr, (n + 1) * sizeof (nc[0]));
+	  if (nc == NULL)
+	    return ENOMEM;
+	  while (++i <= n)
+	    nc[i] = 0;
+	  nc[0] = n;
+	  *ptr = nc;
+	}
+    }
+  return 0;
+}      
+
+int
+mu_coord_dup (mu_coord_t orig, mu_coord_t *copy)
+{
+  size_t i, n = mu_coord_length (orig);
+  int rc = mu_coord_alloc (copy, n);
+  if (rc)
+    return rc;
+  for (i = 1; i <= n; i++)
+    (*copy)[i] = orig[i];
+  return 0;
+}
+
+static void
+revstr (char *s, char *e)
+{
+  while (s < e)
+    {
+      char t = *s;
+      *s++ = *--e;
+      *e = t;
+    }
+}
+
+char *
+mu_coord_part_string (mu_coord_t c, size_t dim)
+{
+  size_t len = 0;
+  size_t i;
+  char *result, *p;
+  
+  for (i = 1; i <= dim; i++)
+    {
+      size_t n = c[i];
+      do
+	len++;
+      while (n /= 10);
+      len++;
+    }
+
+  result = malloc (len);
+  if (!result)
+    return NULL;
+  p = result;
+  
+  for (i = 1; i <= dim; i++)
+    {
+      char *s;
+      size_t n = c[i];
+      if (i > 1)
+	*p++ = '.';
+      s = p;
+      do
+	{
+	  unsigned x = n % 10;
+	  *p++ = x + '0';
+	}
+      while (n /= 10);
+      revstr(s, p);
+    }
+  *p = 0;
+
+  return result;
+}