[VAR_NAME_LEN 09/17] VECTOR: Eliminate VAR_NAME_LEN limit for variable names.

[Ben Pfaff]

Most uses of VAR_NAME_LEN within PSPP are wrong due to encoding issues:
the limit applies to variable names in the encoding used by the data
set, but most uses of VAR_NAME_LEN actually limit the length of a name
in UTF-8.  The UTF-8 representation of a name can be longer or shorter
than its representation in the data set encoding, so it seems best to
eliminate references to VAR_NAME_LEN entirely.
---
 src/language/dictionary/vector.c |   12 +++++++-----
 1 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/language/dictionary/vector.c b/src/language/dictionary/vector.c
index 3be0723..8eb7ef1 100644
--- a/src/language/dictionary/vector.c
+++ b/src/language/dictionary/vector.c
@@ -1,5 +1,5 @@
 /* PSPP - a program for statistical analysis.
-   Copyright (C) 1997-9, 2000, 2010 Free Software Foundation, Inc.
+   Copyright (C) 1997-9, 2000, 2010, 2011 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -159,18 +159,20 @@ cmd_vector (struct lexer *lexer, struct dataset *ds)
               int j;
              for (j = 0; j < var_cnt; j++)
                {
-                  char name[VAR_NAME_LEN + INT_STRLEN_BOUND (int) + 1];
-                 sprintf (name, "%s%d", vectors[i], j + 1);
+                  char *name = xasprintf ("%s%d", vectors[i], j + 1);
                   if (strlen (name) > VAR_NAME_LEN)
                     {
+                      free (name);
                       msg (SE, _("%s is too long for a variable name."), name);
                       goto fail;
                     }
                   if (dict_lookup_var (dict, name))
                    {
+                      free (name);
                      msg (SE, _("%s is an existing variable name."), name);
                      goto fail;
                    }
+                  free (name);
                }
            }
 
@@ -181,10 +183,10 @@ cmd_vector (struct lexer *lexer, struct dataset *ds)
               int j;
              for (j = 0; j < var_cnt; j++)
                {
-                  char name[VAR_NAME_LEN + 1];
-                 sprintf (name, "%s%d", vectors[i], j + 1);
+                  char *name = xasprintf ("%s%d", vectors[i], j + 1);
                  vars[j] = dict_create_var_assert (dict, name, 0);
                   var_set_both_formats (vars[j], &format);
+                  free (name);
                }
               dict_create_vector_assert (dict, vectors[i], vars, var_cnt);
            }
-- 
1.7.1