- Autosize POLARSSL_MPI_RW_BUFFER_SIZE at compile time
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1 changed files with 12 additions and 1 deletions
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@ -77,8 +77,19 @@
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*
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*
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* By default we assume at least a 10 char label, a minimum radix of 10
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* By default we assume at least a 10 char label, a minimum radix of 10
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* (decimal) and a maximum of 4096 bit numbers (1234 decimal chars).
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* (decimal) and a maximum of 4096 bit numbers (1234 decimal chars).
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* Autosized at compile time for at least a 10 char label, a minimum radix
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* of 10 (decimal) for a number of POLARSSL_MPI_MAX_BITS size.
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*
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* This used to be statically sized to 1250 for a maximum of 4096 bit
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* numbers (1234 decimal chars).
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*
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* Calculate using the formula:
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* POLARSSL_MPI_RW_BUFFER_SIZE = ceil(POLARSSL_MPI_MAX_BITS / ln(10) * ln(2)) +
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* LabelSize + 6
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*/
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*/
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#define POLARSSL_MPI_RW_BUFFER_SIZE 1250
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#define POLARSSL_MPI_MAX_BITS_SCALE100 ( 100 * POLARSSL_MPI_MAX_BITS )
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#define LN_2_DIV_LN_10_SCALE100 332
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#define POLARSSL_MPI_RW_BUFFER_SIZE ( ((POLARSSL_MPI_MAX_BITS_SCALE100 + LN_2_DIV_LN_10_SCALE100 - 1) / LN_2_DIV_LN_10_SCALE100) + 10 + 6 )
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/*
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/*
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* Define the base integer type, architecture-wise
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* Define the base integer type, architecture-wise
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