1 files changed, 65 insertions, 10 deletions

diff --git a/misc/efgcvt.c b/misc/efgcvt.c
index 24d63176d0..8c92766c63 100644
--- a/misc/efgcvt.c
+++ b/misc/efgcvt.c
@@ -20,28 +20,60 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <float.h>
+#include <bits/libc-lock.h>
 
 #ifndef FLOAT_TYPE
-#define FLOAT_TYPE double
-#define FUNC_PREFIX
-#define FLOAT_FMT_FLAG
-#define MAXDIG (DBL_DIG + DBL_MAX_10_EXP)
+# define FLOAT_TYPE double
+# define FUNC_PREFIX
+# define FLOAT_FMT_FLAG
+/* Actually we have to write (DBL_DIG + log10 (DBL_MAX_10_EXP)) but we
+   don't have log10 available in the preprocessor.  */
+# define MAXDIG (DBL_DIG + 3)
 #endif
 
 #define APPEND(a, b) APPEND2 (a, b)
 #define APPEND2(a, b) a##b
 
 
+#define FCVT_BUFFER APPEND (FUNC_PREFIX, fcvt_buffer)
+#define ECVT_BUFFER APPEND (FUNC_PREFIX, ecvt_buffer)
+
+
+static char *FCVT_BUFFER;
+static char *ECVT_BUFFER;
+
+
+static void
+APPEND (FUNC_PREFIX, fcvt_allocate) (void)
+{
+  FCVT_BUFFER = (char *) malloc (MAXDIG);
+}
+
 char *
 APPEND (FUNC_PREFIX, fcvt) (value, ndigit, decpt, sign)
      FLOAT_TYPE value;
      int ndigit, *decpt, *sign;
 {
-  static char buf[MAXDIG];
+  __libc_once_define (static, once);
+  __libc_once (once, APPEND (FUNC_PREFIX, fcvt_allocate));
 
-  (void) fcvt_r (value, ndigit, decpt, sign, buf, sizeof buf);
+  if (FCVT_BUFFER == NULL)
+    /* If no core is available we don't have a chance to run the
+       program successfully and so returning NULL is an acceptable
+       result.  */
+    return NULL;
 
-  return buf;
+  (void) APPEND (FUNC_PREFIX, fcvt_r) (value, ndigit, decpt, sign,
+				       FCVT_BUFFER, MAXDIG);
+
+  return FCVT_BUFFER;
+}
+
+
+static void
+APPEND (FUNC_PREFIX, ecvt_allocate) (void)
+{
+  ECVT_BUFFER = (char *) malloc (MAXDIG);
 }
 
 char *
@@ -49,11 +81,19 @@ APPEND (FUNC_PREFIX, ecvt) (value, ndigit, decpt, sign)
      FLOAT_TYPE value;
      int ndigit, *decpt, *sign;
 {
-  static char buf[MAXDIG];
+  __libc_once_define (static, once);
+  __libc_once (once, APPEND (FUNC_PREFIX, ecvt_allocate));
 
-  (void) ecvt_r (value, ndigit, decpt, sign, buf, sizeof buf);
+  if (ECVT_BUFFER == NULL)
+    /* If no core is available we don't have a chance to run the
+       program successfully and so returning NULL is an acceptable
+       result.  */
+    return NULL;
 
-  return buf;
+  (void) APPEND (FUNC_PREFIX, ecvt_r) (value, ndigit, decpt, sign,
+				       ECVT_BUFFER, MAXDIG);
+
+  return ECVT_BUFFER;
 }
 
 char *
@@ -65,3 +105,18 @@ APPEND (FUNC_PREFIX, gcvt) (value, ndigit, buf)
   sprintf (buf, "%.*" FLOAT_FMT_FLAG "g", ndigit, value);
   return buf;
 }
+
+
+/* Make sure the memory is freed if the programs ends while in
+   memory-debugging mode and something actually was allocated.  */
+static void
+__attribute__ ((unused))
+free_mem (void)
+{
+  if (FCVT_BUFFER != NULL)
+    free (FCVT_BUFFER);
+  if (ECVT_BUFFER != NULL)
+    free (ECVT_BUFFER);
+}
+
+text_set_element (__libc_subfreeres, free_mem);