seq: Removed zero-padding of string when parsing with parse_exponent_no_decimal#6185
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sylvestre merged 5 commits intouutils:mainfrom Apr 8, 2024
maxer137:main
Merged
seq: Removed zero-padding of string when parsing with parse_exponent_no_decimal#6185sylvestre merged 5 commits intouutils:mainfrom maxer137:main
sylvestre merged 5 commits intouutils:mainfrom
maxer137:main
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When exponent is greater than 0 we previously created a new string causing us to create a new string with a much larger size. This would the get passed to the BigDecimal crate which would get stuck.
I had made the mistake of not running all the tests. This is indeed needed. However, you still need to add the exponent if it's positive for 0 numbers. This way, 0 numbers (such as 0e+5) will be counted as having a width of 5. This change also removes the memory allocation needed for the previous implementation. Where the string itself would be padded with zeros on the right side. Creating large numbers this method would cause large allocations in memory. This does not seem to fix issue #6182.
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This adds the same fix applied to `parse_exponent_no_decimal`. This way we don't need to create large strings
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This relates to #6182, but does not close the issue.
I looked into how seq parsed the width and found that we were padding the string with zeroes based on the exponent. This would mean that numbers with large exponents would generate a string with the same number of characters.
This PR removes the generation of the string.
Instead, the num_integral_digits is calculated directly. No new strings are generated now when parsing an exponent without decimals.