From 6bf6119d76b761cbbca0ca9e5b680f419eaf937b Mon Sep 17 00:00:00 2001
From: Ben Pfaff <blp@cs.stanford.edu>
Date: Fri, 18 Feb 2011 22:30:00 -0800
Subject: [PATCH] data-out: Make each converter responsible for storing null
 terminator.

Until now, every converter has produced output that is exactly as many
bytes long as the format's width.  In upcoming patches this will change,
because in UTF-8 a character that occupies a single display column can
require multiple bytes.  In preparation, this commit requires the
individual converters to write out their own null byte, giving a bit
more flexibility regarding length.
---
 src/data/data-out.c | 36 +++++++++++++++++++++++++++++++++---
 1 file changed, 33 insertions(+), 3 deletions(-)

diff --git a/src/data/data-out.c b/src/data/data-out.c
index ca5fcece..85e8eaae 100644
--- a/src/data/data-out.c
+++ b/src/data/data-out.c
@@ -136,7 +136,6 @@ data_out_pool (const union value *input, const char *encoding,
   assert (fmt_check_output (format));
 
   converters[format->type] (input, format, output);
-  output[format->w] = '\0';
 
   t =  recode_string_pool (UTF8, encoding, output, format->w, pool);
   free (output);
@@ -200,6 +199,8 @@ output_N (const union value *input, const struct fmt_spec *format,
       else
         output_overflow (format, output);
     }
+
+  output[format->w] = '\0';
 }
 
 /* Outputs Z format. */
@@ -223,6 +224,7 @@ output_Z (const union value *input, const struct fmt_spec *format,
           *p = "}JKLMNOPQR"[*p - '0'];
         }
       memcpy (output, buf, format->w);
+      output[format->w] = '\0';
     }
 }
 
@@ -266,6 +268,8 @@ output_IB (const union value *input, const struct fmt_spec *format,
 			     settings_get_output_integer_format (),
                              output);
     }
+
+  output[format->w] = '\0';
 }
 
 /* Outputs PIB format. */
@@ -280,6 +284,8 @@ output_PIB (const union value *input, const struct fmt_spec *format,
   else
     output_binary_integer (number, format->w,
 			   settings_get_output_integer_format (), output);
+
+  output[format->w] = '\0';
 }
 
 /* Outputs PIBHEX format. */
@@ -298,6 +304,7 @@ output_PIBHEX (const union value *input, const struct fmt_spec *format,
       output_binary_integer (number, format->w / 2, INTEGER_MSB_FIRST, tmp);
       output_hex (tmp, format->w / 2, output);
     }
+
 }
 
 /* Outputs RB format. */
@@ -307,6 +314,8 @@ output_RB (const union value *input, const struct fmt_spec *format,
 {
   double d = input->f;
   memcpy (output, &d, format->w);
+
+  output[format->w] = '\0';
 }
 
 /* Outputs RBHEX format. */
@@ -315,6 +324,7 @@ output_RBHEX (const union value *input, const struct fmt_spec *format,
               char *output)
 {
   double d = input->f;
+
   output_hex (&d, format->w / 2, output);
 }
 
@@ -451,6 +461,7 @@ output_date (const union value *input, const struct fmt_spec *format,
     }
 
   buf_copy_lpad (output, format->w, tmp, p - tmp, ' ');
+  output[format->w] = '\0';
   return;
 
  overflow:
@@ -474,13 +485,18 @@ output_WKDAY (const union value *input, const struct fmt_spec *format,
     };
 
   if (input->f >= 1 && input->f < 8)
-    buf_copy_str_rpad (output, format->w, weekdays[(int) input->f - 1], ' ');
+    {
+      buf_copy_str_rpad (output, format->w,
+                         weekdays[(int) input->f - 1], ' ');
+      output[format->w] = '\0';
+    }
   else
     {
       if (input->f != SYSMIS)
         msg (ME, _("Weekday number %f is not between 1 and 7."), input->f);
       output_missing (format, output);
     }
+
 }
 
 /* Outputs MONTH format. */
@@ -495,13 +511,17 @@ output_MONTH (const union value *input, const struct fmt_spec *format,
     };
 
   if (input->f >= 1 && input->f < 13)
-    buf_copy_str_rpad (output, format->w, months[(int) input->f - 1], ' ');
+    {
+      buf_copy_str_rpad (output, format->w, months[(int) input->f - 1], ' ');
+      output[format->w] = '\0';
+    }
   else
     {
       if (input->f != SYSMIS)
         msg (ME, _("Month number %f is not between 1 and 12."), input->f);
       output_missing (format, output);
     }
+
 }
 
 /* Outputs A format. */
@@ -510,6 +530,7 @@ output_A (const union value *input, const struct fmt_spec *format,
           char *output)
 {
   memcpy (output, value_str (input, format->w), format->w);
+  output[format->w] = '\0';
 }
 
 /* Outputs AHEX format. */
@@ -724,6 +745,7 @@ output_scientific (double number, const struct fmt_spec *format,
 
   assert (p == buf + format->w);
   memcpy (output, buf, format->w);
+  output[format->w] = '\0';
 
   return true;
 }
@@ -973,6 +995,8 @@ output_infinite (double number, const struct fmt_spec *format, char *output)
     }
   else
     output_overflow (format, output);
+
+  output[format->w] = '\0';
 }
 
 /* Formats OUTPUT as a missing value for the given FORMAT. */
@@ -990,6 +1014,8 @@ output_missing (const struct fmt_spec *format, char *output)
     }
   else
     output[format->w - 1] = '.';
+
+  output[format->w] = '\0';
 }
 
 /* Formats OUTPUT for overflow given FORMAT. */
@@ -997,6 +1023,7 @@ static void
 output_overflow (const struct fmt_spec *format, char *output)
 {
   memset (output, '*', format->w);
+  output[format->w] = '\0';
 }
 
 /* Converts the integer part of NUMBER to a packed BCD number
@@ -1011,6 +1038,8 @@ output_bcd_integer (double number, int digits, char *output)
   char decimal[64];
 
   assert (digits < sizeof decimal);
+
+  output[DIV_RND_UP (digits, 2)] = '\0';
   if (number != SYSMIS
       && number >= 0.
       && number < power10 (digits)
@@ -1060,4 +1089,5 @@ output_hex (const void *data_, size_t bytes, char *output)
       *output++ = hex_digits[data[i] >> 4];
       *output++ = hex_digits[data[i] & 15];
     }
+  *output = '\0';
 }
-- 
2.30.2