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Fix count variable calculation in typedarray copyWithin (#3158)

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Fixes #3130

JerryScript-DCO-1.0-Signed-off-by: Adam Szilagyi aszilagy@inf.u-szeged.hu
This commit is contained in:
Szilagyi Adam 2019-10-07 11:31:44 +02:00 committed by Robert Fancsik
parent 3e23a3b62f
commit 0f754ff33c
1 changed files with 4 additions and 4 deletions
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8
jerry-core/ecma/builtin-objects/typedarray/ecma-builtin-typedarray-prototype.c
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@ -1873,16 +1873,16 @@ ecma_builtin_typedarray_prototype_copy_within (ecma_value_t this_arg, /**< this
} }
} }
int32_t distance = (int32_t) (end - start);
int32_t offset = (int32_t) (info.typedarray_length - target);
int32_t count = JERRY_MIN (distance, offset);
if (target >= info.typedarray_length || start >= end || end == 0) if (target >= info.typedarray_length || start >= end || end == 0)
{ {
return ecma_copy_value (this_arg); return ecma_copy_value (this_arg);
} }
else else
{ {
uint32_t distance = end - start;
uint32_t offset = info.typedarray_length - target;
uint32_t count = JERRY_MIN (distance, offset);
memmove (info.buffer_p + (target * info.element_size), memmove (info.buffer_p + (target * info.element_size),
info.buffer_p + (start * info.element_size), info.buffer_p + (start * info.element_size),
(size_t) (count * info.element_size)); (size_t) (count * info.element_size));