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libbb/xrealloc_vector.c: better comment

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Denys Vlasenko 2009-10-27 10:01:01 +01:00
parent 12450dbeef
commit 1502a8b4ce
1 changed files with 3 additions and 2 deletions
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5
libbb/xrealloc_vector.c
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@ -20,8 +20,9 @@
* idx step, plus one: if idx == 0x20, vector[] is resized to 0x31,
* thus last usable element is vector[0x30].
*
* In other words: after xrealloc_vector(v, 4, idx) it's ok to use
* at least v[idx] and v[idx+1], for all idx values.
* In other words: after xrealloc_vector(v, 4, idx), with any idx,
* it's ok to use at least v[idx] and v[idx+1].
* v[idx+2] etc generally are not ok.
*
* New elements are zeroed out, but only if realloc was done
* (not on every call). You can depend on v[idx] and v[idx+1] being