Cygwin: Clarify some code in environ.cc
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@ -545,6 +545,7 @@ _getenv_r (struct _reent *, const char *name)
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return findenv_func (name, &offset);
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}
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/* Return size of environment block, including terminating NULL. */
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static int __stdcall
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envsize (const char * const *in_envp)
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{
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@ -582,11 +583,16 @@ _addenv (const char *name, const char *value, int overwrite)
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else
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{ /* Create new slot. */
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int sz = envsize (cur_environ ());
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/* Allocate space for two new slots even though only one is needed.
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According to the commit message for commit ebd645e
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(2001-10-03), this is done to "work around problems with some
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buggy applications." */
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int allocsz = sz + (2 * sizeof (char *));
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offset = (sz - 1) / sizeof (char *);
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/* Allocate space for additional element plus terminating NULL. */
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/* Allocate space for additional element. */
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if (cur_environ () == lastenviron)
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lastenviron = __cygwin_environ = (char **) realloc (cur_environ (),
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allocsz);
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