vendored/double-conversion/fixed-dtoa.h

0001 // Copyright 2010 the V8 project authors. All rights reserved.
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0003 // modification, are permitted provided that the following conditions are
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0027
0028 #ifndef DOUBLE_CONVERSION_FIXED_DTOA_H_
0029 #define DOUBLE_CONVERSION_FIXED_DTOA_H_
0030
0031 #include "utils.h"
0032
0033 namespace arrow_vendored {
0034 namespace double_conversion {
0035
0036 // Produces digits necessary to print a given number with
0037 // 'fractional_count' digits after the decimal point.
0038 // The buffer must be big enough to hold the result plus one terminating null
0039 // character.
0040 //
0041 // The produced digits might be too short in which case the caller has to fill
0042 // the gaps with '0's.
0043 // Example: FastFixedDtoa(0.001, 5, ...) is allowed to return buffer = "1", and
0044 // decimal_point = -2.
0045 // Halfway cases are rounded towards +/-Infinity (away from 0). The call
0046 // FastFixedDtoa(0.15, 2, ...) thus returns buffer = "2", decimal_point = 0.
0047 // The returned buffer may contain digits that would be truncated from the
0048 // shortest representation of the input.
0049 //
0050 // This method only works for some parameters. If it can't handle the input it
0051 // returns false. The output is null-terminated when the function succeeds.
0052 bool FastFixedDtoa(double v, int fractional_count,
0053                    Vector<char> buffer, int* length, int* decimal_point);
0054
0055 }  // namespace double_conversion
0056 }  // namespace arrow_vendored
0057
0058 #endif  // DOUBLE_CONVERSION_FIXED_DTOA_H_