Check for buffer and string overflow more precisely.

[bpt/emacs.git] / src / ChangeLog

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 2011-06-06  Paul Eggert  <eggert@cs.ucla.edu>
 
+       Check for buffer and string overflow more precisely.
+       * buffer.h (BUF_BYTES_MAX): New macro.
+       * lisp.h (STRING_BYTES_MAX): New macro.
+       * alloc.c (Fmake_string):
+       * character.c (string_escape_byte8):
+       * coding.c (coding_alloc_by_realloc):
+       * doprnt.c (doprnt):
+       * editfns.c (Fformat):
+       * eval.c (verror):
+       Use STRING_BYTES_MAX, not MOST_POSITIVE_FIXNUM,
+       since they may not be the same number.
+       * editfns.c (Finsert_char):
+       * fileio.c (Finsert_file_contents):
+       Likewise for BUF_BYTES_MAX.
+
        * image.c: Use ptrdiff_t, not int, for sizes.
        (slurp_file): Switch from int to ptrdiff_t.
        All uses changed.