# include <config.h>
#endif
-#include <stddef.h>
+#if HAVE_STDDEF_H
+# include <stddef.h>
+#endif
+
#include <stdio.h>
-#include <string.h>
+#if HAVE_STRING_H
+# include <string.h>
+#else
+# include <strings.h>
+#endif
#if HAVE_STDLIB_H
# include <stdlib.h>
#endif
# endif
#endif
+#include "path-concat.h"
+
char *xmalloc ();
char *xrealloc ();
+/* The following static variable is declared 'volatile' to avoid a
+ possible multithread problem in the function get_charset_aliases. If we
+ are running in a threaded environment, and if two threads initialize
+ 'charset_aliases' simultaneously, both will produce the same value,
+ and everything will be ok if the two assignments to 'charset_aliases'
+ are atomic. But I don't know what will happen if the two assignments mix. */
/* Pointer to the contents of the charset.alias file, if it has already been
read, else NULL. Its format is:
ALIAS_1 '\0' CANONICAL_1 '\0' ... ALIAS_n '\0' CANONICAL_n '\0' '\0' */
if (cp == NULL)
{
FILE *fp;
+ char *file_name = path_concat (LIBDIR, "charset.alias", NULL);
- fp = fopen (LIBDIR "/" "charset.alias", "r");
- if (fp == NULL)
- /* File not found, treat it as empty. */
+ if (file_name == NULL || (fp = fopen (file_name, "r")) == NULL)
+ /* Out of memory or file not found, treat it as empty. */
cp = "";
else
{
}
charset_aliases = cp;
+ if (file_name != NULL)
+ free (file_name);
}
return cp;